Downhole tools having features for reducing balling, methods of forming such tools, and methods of repairing such tools

Downhole tools are provided with a topographical pattern, and anti-balling material is provided over the topographical pattern. The topographical pattern may be defined by at least one of a plurality of recesses extending into a surface of a body of the tool and a plurality of protrusions protruding from the surface. Downhole tools include an insert disposed within a recess in a body, and the insert comprises an anti-balling material having a composition selected to reduce accumulation of formation cuttings on the tools when the tools are used to form or service a wellbore. Downhole tools include anti-balling material disposed over a porous mass provided over the surfaces of the tools. Methods of forming downhole tools include providing anti-balling material over features on and/or in a surface of a body of a tool. Methods of repairing downhole tools include removing an insert therefrom and disposing a replacement insert therein.

Manufacturing of holemaking tools

A process for producing a tool having a main body which extends in a longitudinal direction and at least one blade for machining a workpiece includes providing a base coating on the tool; grinding the at least one blade in a manner that removes the base coating in the region of the at least one blade; and providing a second, fine coating, to the at least one ground blade.

ROUND TOOL BLANK AND METHOD AND DEVICE FOR MAKING THE SAME

The present invention relates to a method and a device for manufacturing a blank for a round tool and to a blank for a round tool, and eventually to a method for manufacturing a round tool and to a round tool obtained. The device comprises a die for extrusion and a sleeve arrangement comprising a sleeve, and an end member for closing the sleeve in one end. Extrusion through the die continuously forms an extruded material comprising chip flutes and optionally internal coolant channels, which is received by the sleeve arrangement. The extruded material received by the sleeve arrangement is reworked and shaped to a shank portion after the interior shape of the sleeve arrangement. A projection of the end member protruding into the sleeve forms a bore in the blank. When the shank portion is finished the end member is released and moved forward as extrusion continues to form a fluted portion to complete the blank. The material waste is minimal in this process and since the internal coolant channels are formed simultaneously with the chip flutes in the fluted portion there is no risk of deforming the internal coolant channels. Moreover, a bore in the round tool removes unnecessary material and provides improved design of internal coolant channels. 1. A method for manufacturing a blank for a round tool , the blank comprising a shank portion and a fluted portion , the method comprising the steps of:providing a feed material;feeding the feed material through a die, thereby forming by extrusion an extruded material with chip flutes defined by an interior flute-forming surface of the die;allowing the extruded material to progress in an extrusion direction into a first end of a sleeve, the sleeve being closed in a second end by an end member including a projection protruding into the sleeve, and to fill the sleeve, thereby forming the shank portion having a shape defined by an interior shank-forming surface of the sleeve and the end member;releasing the end member to allow the ...

GROOVE CUTTER ASSEMBLY AND METHOD FOR FABRICATING SAME

A groove cutter assembly includes a cutter blade and two washers. A shaft through hole is defined in a center of the cutter blade. The cutter blade includes two side surfaces. An engaging groove is defined in each of the two side surfaces around the shaft through hole in the cutter blade. A cutting edge is formed in a distal edge the cutter blade. A shaft through hole is defined in each of the two washers. Each of the two washers is securely engaged in one of the two engaging grooves of the cutter blade. 1. A groove cutter assembly , comprising:a cutter blade defining a shaft through hole in a center thereof, and the cutter blade comprising two side surfaces, wherein an engaging groove is defined in each of the two side surfaces around the shaft through hole, and a cutting edge is formed in a distal edge of the outer edge of the cutter blade; andtwo washers, wherein a shaft through hole is defined in each of the two washers, and each of the two washers is securely engaged in one of the two engaging grooves of the cutter blade.2. The groove cutter assembly of claim 1 , wherein the washer comprises an inner surface attached to the cutter blade; a plurality of radial grooves is defined in the inner surface of the washer claim 1 , and the radial grooves extend along radial directions of the washer.3. The groove cutter assembly of claim 2 , wherein a plurality of annular grooves is defined in the inner surface of the washer; the annular grooves communicate with the radial grooves.4. The groove cutter assembly of claim 1 , wherein the cutter blade is made of tungsten steel.5. The groove cutter assembly of claim 1 , wherein the washer is made of JIS S45C/S48C steel.6. A method for fabricating a groove cutter assembly claim 1 , comprising:providing two washers, wherein a shaft through hole is defined in each of the two washers;providing a cutter blade preform defining a shaft through hole in a center thereof and comprising two side surfaces, wherein an engaging groove is ...

MILL AND METHOD OF USE

A method for plunge milling a workpiece. The method includes rotating a cutting head while advancing the cutting head along a direction towards the workpiece; removing material from the workpiece with frontal teeth disposed on a frontal face of the cutting head; bending a tool holder configured to lead the cutting head inside the workpiece; stopping the advancing of the cutting head along the direction towards the workpiece when the cutting head has reached a predetermined depth inside the workpiece; and retrieving while rotating the cutting head from the inside of the workpiece such that side teeth of the cutting head remove material from the inside of the workpiece due to the bending of the tool holder. 1. A method for plunge milling a workpiece , the method comprising:rotating a cutting head while advancing the cutting head along a direction towards the workpiece;removing material from the workpiece with frontal teeth disposed on a frontal face of the cutting head;bending a tool holder configured to lead the cutting head inside the workpiece;stopping the advancing of the cutting head along the direction towards the workpiece when the cutting head has reached a predetermined depth inside the workpiece; andretrieving while rotating the cutting head from the inside of the workpiece such that side teeth of the cutting head remove material from the inside of the workpiece due to the bending of the tool holder.2. The method of claim 1 , further comprising:maintaining a base of the tool holder on a same axis while advancing and retrieving the cutting head.3. The method of claim 1 , further comprising:bending the tool holder away from a lateral side of a hole that is being acted upon by the cutting head.4. The method of claim 1 , further comprising:acting only with the side teeth on the workpiece while retrieving the cutting head.5. The method of claim 1 , wherein the cutting head comprises claim 1 ,a base surface configured to be connected to the tool holder;a side ...

THRU-TUBING MILL

A thru-tubing mill with an elongate body having an attachment end and a milling end. The attachment end is attached to a tubing string. The milling end has a semi-torroidal surface defined by a two-dimensional curved line rotated about a central point that is spaced from the curve in a direction that is perpendicular to the curved line and a plurality of curved support members attached to the semi-torroidal surface that extend along the semi-torroidal surface, each curved support members having a first curve similar to the two-dimensional curved line in a first dimension and a second curve that is cambered relative to the two-dimensional curved line in a second dimension. A hard coating is installed on at least one side of the curved support members. 1. A thru-tubing mill comprising: a semi-torroidal surface defined by a two-dimensional curved line rotated about a central point that is spaced from the curve in a direction that is perpendicular to the curved line;', 'a plurality of curved support members attached to the semi-torroidal surface that extend along the semi-torroidal surface, each curved support members having a first curve similar to the two-dimensional curved line in a first dimension and a second curve that is cambered relative to the two-dimensional curved line in a second dimension; and', 'a hard coating installed on at least one side of the curved support members., 'an elongate body having an attachment end and a milling end, the attachment end being attached to a tubing string, the milling end comprising2. The thru-tubing mill of claim 1 , further comprising angled flow channels extending along an outer surface of the elongate body from the semi-torroidal surface toward the attachment end3. The thru-tubing mill of claim 1 , wherein the elongate body comprises a central flow channel and the semi-torroidal surface comprises flow ports in communication with the central flow channel.4. The thru-tubing mill of claim 1 , wherein the hard coating ...

Machining tool and method for producing same

A machining tool comprising at least one plate-shaped cutting insert made of impact- and/or wear-resistant cutting material at least in some sections and which is adhesively bonded to a cutter holder directly by means of an adhesive layer in an immovable manner by means of a contact surface arrangement, the cutting insert substantially prism-shaped. A base area of the prism is adhesively bonded to the cutting insert holder substantially over the full area, a jacket surface arrangement of the prism adjacent to the cutting edge for spatially fixing the cutter is drawn to the tool, and a section of the jacket surface arrangement substantially opposite the cutting edge is caught in a fitting groove of the cutting insert holder.

TWIST DRILL ASSEMBLY, COMPONENTS FOR SAME AND METHOD FOR MAKING SAME

A twist drill assembly () comprising a shaft () and a drill tip (); the shaft having a single internal shaft conduit () for a fluid, extending between orifices () formed into the shaft; the drill tip having an internal drill tip conduit () for the fluid, extending between orifices formed into the drill tip; the shaft and the drill tip configured such that the drill tip is connectable to an end of the shaft with the internal drill tip conduit in communication with the internal shaft conduit, allowing the fluid to be capable of flowing from the internal shaft conduit into the internal drill tip conduit; the internal shaft conduit having a spiral form aligned with a central longitudinal axis of the shaft, and configured to complement the arrangement of spiral flutes () formed on the shaft. 1. A twist drill assembly comprising a shaft and a drill tip; the shaft having a single internal shaft conduit for a fluid , extending between orifices formed into the shaft; the drill tip having an internal drill tip conduit for the fluid , extending between orifices formed into the drill tip; the shaft and the drill tip configured such that the drill tip is connectable to an end of the shaft with the internal drill tip conduit in communication with the internal shaft conduit , allowing the fluid to be capable of flowing from the internal shaft conduit into the internal drill tip conduit; the internal shaft conduit having a spiral form aligned with a central longitudinal axis of the shaft , and configured to complement the arrangement of spiral flutes formed on the shaft.2. A twist drill assembly as claimed in claim 1 , in which the internal shaft conduit is configured to have a sufficiently large cross-sectional area to allow a desired predetermined flux of fluid to pass through it claim 1 , and configured within the shaft to maximise the thickness of the wall between the internal shank conduit and the innermost surface of the flutes.3. A twist drill assembly as claimed in claim 1 ...

Bore Cutting Tool and Method of Making the Same

A bore cutting tool, particularly for cutting metal workpieces, includes a tool substrate and a tool coating on a surface of the tool substrate. The bore cutting tool comprises a plurality of pits in the surface of the tool substrate and wherein the tool coating extends over the pits such that the pit surface comprises the tool coating. In this way, the pit dimensions can be retained over prolonged tool life and the pits, with their coated surface, are particularly effective at retaining lubricant so that the thickness of a lubricant film can be increased as compared to a tool without the coated pits. In embodiments the pits are formed by laser etching and are present only on the cylindrical land. Average pit depth is suitably in the range 8 μm to 25 μm, average pit width and pit length is independently selected from 40 μm to 250 μm and average pit density is 20 to 30 pits/mm. 1. A bore cutting tool comprising:a tool substrate; anda tool coating on a surface of the tool substrate wherein the bore cutting tool includes a plurality of pits in the surface of the tool substrate and wherein the tool coating extends over the plurality of pits such that the pit surface comprises the tool coating.2. A bore cutting tool according to claim 1 , wherein an average pit depth of each of the plurality of pits is at least 8 μm.3. A bore cutting tool according to claim 1 , wherein an average pit depth of each of the plurality of pits is about 8 μm to about 25 μm.4. A bore cutting tool according to claim 1 , wherein an average pit cross-sectional area of each of the plurality of pits is about 0.005 mmto about 1 mm.5. A bore cutting tool according to claim 1 , wherein the plurality of pits is an array of pits.6. A bore cutting tool according to claim 1 , wherein the plurality of pits is present only on at least one surface of the bore cutting tool claim 1 , which in use is in frictional contact with a workpiece.7. A bore cutting tool according to claim 1 , wherein the bore cutting ...

METHOD OF MAKING A BIT FOR A ROTARY DRILL

A method of manufacturing a bit for a rotary drill, the bit including a drill tip (), the method including providing a precursor structure () comprising substrate body () and a super-hard structure () joined to an upper surface of the substrate body; cutting a plurality of conformal inserts () from the precursor structure (), each insert () comprising a part of the super-hard structure; providing a drill tip () configured for receiving the insert (); and joining the insert to the drill tip (). 1. A method of manufacturing a bit for a rotary drill , the bit including a drill tip provided with a point angle , the method including providing a precursor structure comprising a substrate body and a super-hard structure joined to an upper surface of the substrate body , the precursor structure having an upper surface defining a central apex extending between opposite ends of the precursor structure , the apex forming an included angle substantially equal to the point angle; cutting a plurality of conformal inserts from the precursor structure , each insert comprising a part of the super-hard structure; providing a drill tip configured for receiving the insert; and joining the insert to the drill tip.2. A method as claimed in claim 1 , in which the plurality of inserts are configured to have conformal side surfaces extending between the upper surface of the substrate body and a bottom end of the substrate body opposite the upper surface of the substrate body.3. A method as claimed in claim 2 , in which the upper surface of the substrate body includes at least two non-parallel regions configured to be suitable for a desired point geometry of the drill.4. A method as claimed in claim 1 , including processing the inserts.5. A method as claimed in claim 4 , in which processing modifies the dimensions of the inserts by at most about 500 microns.6. A method as claimed in claim 1 , including processing the insert after joining the insert to the drill tip.7. A method as claimed in ...

MODULAR CUTTING TOOL BODY AND METHOD FOR MANUFACTURING THE SAME

A cutting tool body includes a first member and a second member, both having a substantially cylindrical shape, and arranged such that a tool body central axis coincides with a central axis of each of the first and the second members. The first member has a tool characteristic of a first magnitude and the second member has the tool characteristic of a second magnitude, different from the first magnitude. The cutting tool body includes a transition member arranged between the first and second members and connected at a first end to the first member and at a second end to the second member. The tool characteristic in the transition member is of the first magnitude at the first end and of the second magnitude at the second end. The transition member has a transition region between the first and the second ends in which the tool characteristic transforms from the first magnitude to the second magnitude. 1. A cutting tool body comprising:a first member and a second member, both the first and second member each having a substantially cylindrical shape, arranged such that a tool body central axis coincides with a central axis of each of the first and the second members, wherein the first member has a tool characteristic of a first magnitude, and the second member has the tool characteristic of a second magnitude, which is different from the first magnitude; anda transition member arranged between the first and second members and connected at a first end to the first member and at a second end to the second member, wherein the tool characteristic in the transition member is of the first magnitude at the first end, and of the second magnitude at the second end, and wherein the transition member includes a transition region between the first and the second ends in which the tool characteristic transforms from the first magnitude to the second magnitude.2. The cutting tool body according to claim 1 , further comprising at least one flute and/or one or more cutting edges.3. The ...

Dust vacuuming drill device with an internal dust passageway and method for producing the same

A dust vacuuming drill device is adapted to be connected with a vacuum suction device by a socket, and includes a drill bit and a driven shank threadedly engaged with each other and cooperatively defining therein an internal dust passageway in communication with the socket for removing the dust generated during a drilling operation. The drill unit can be removed from the driven shank when the drill unit is broken so as to readily replace the drill unit without the need to detach the driven shank from the socket, which results in low operation and material costs.

DRILL BLANK, METHOD FOR MANUFACTURING DRILL BLANK, DRILL, AND METHOD FOR MANUFACTURING DRILL

Provided are a drill blank, a method for manufacturing a blank, a drill, and a method for manufacturing a drill which allow a step of brazing to be easy and allow the brazing to be precise. 1. A drill blank which is in an elongated columnar-shape and is made of cemented carbide ,{'sub': A', 'B', 'A', 'B', 'C', 'A', 'B', 'A', 'C', 'A', 'A', 'B', 'C, 'wherein both dand dare equal to or smaller than 2 mm, d≧d>d, a ratio of the length L to dis equal to or larger than 3, and d/d=0.96 to 1 and d/d=0.9 to 0.995 in a longitudinal direction, where dindicates the diameter of one end A of both ends, dindicates the diameter of the other end B thereof, dindicates the minimum diameter of a central portion C, and L indicates the length in the longitudinal direction.'}2. The drill blank according to claim 1 ,wherein the drill blank is produced by press-molding.3. The drill blank according to claim 1 ,wherein average diameters of WC grains in both the one end A and the other end B are larger than an average diameter of the WC grains in the central portion C.4. A method for manufacturing a drill blank comprising:producing particles of which an average diameter ranges from 100 μm to 150 μm and unevenness in size ranges from 60 μm to 100 μm by preparing base powder including WC powder;producing a molded body by filling a cavity of a die of a press-molding die with the particles, causing an upper punch to be lowered from above and pressurizing the particles which fill the inside of the cavity of the die, adding an additional load onto the upper punch so as to cause a position of the upper punch to be lowered downward from a holding position of the upper punch at the time of pressurizing by 0.1 mm to 2 mm, and removing a load from a lower punch; anda step of firing the molded body.5. A drill comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'the drill blank according to that is brazed to a shank,'}wherein drill bit is grinded on the drill blank.6. A drill comprising:a ...

Method of manufacturing a cutting tool and a cutting tool

The disclosure relates to a method of manufacturing a cutting tool including the steps of: providing a cutting tool blank including a cutting edge, defined by a cross-sectional wedge angle (β). The wedge angle has a variation along the cutting edge, and material is removed from the cutting edge with a constant material removal rate per length unit of the edge, such as to form a corresponding variation of edge rounding along the cutting edge. The disclosure further relates to a cutting tool including the cutting edge defined by the cross-sectional wedge angle having a variation along the cutting edge and wherein the cutting edge has a corresponding variation of edge rounding along the cutting edge.

Manufacturing Process, Tool Stand, and Drill Bit

A method for producing a drill includes cold forming of a rod-shaped blank to form a semifinished product having three or more rectilinear longitudinal ribs extending along a longitudinal axis of the semifinished product, introducing the longitudinal ribs into a first die and a second die in a working direction, where the first die bears against the longitudinal ribs in a direction of rotation about the longitudinal axis and the second die bears against the longitudinal ribs counter to the direction of rotation, pivoting the first die in the direction of rotation in relation to the second die in order to twist the longitudinal ribs between the first and second dies, pulling the longitudinal ribs 31 through the pivoted first die and the second die counter to the working direction in order to twist the longitudinal ribs and apply a drill head to the rear end in the working direction.

Method for producing a cutting tool, and cutting tool

A method for producing a cutting tool is described. This method includes the production of a tool body of the cutting tool by means of a generative production method. At least one coolant cavity that has, at least in segments, an essentially triangular cross section is in this case provided in the tool body. Moreover, a cutting tool produced by means of this method is presented. Also proposed is a cutting tool having at least one coolant cavity running therein, wherein the coolant cavity has, at least in segments, an essentially triangular cross section and the cutting tool is produced, at least in segments, by means of a generative production method.

METHOD FOR PRODUCING A CUTTING HEAD, AND CUTTING HEAD

A method for producing a cutting head is specified. The latter is manufactured from a blank, which in turn is manufactured by means of extrusion. During extrusion, a number of coolant channels as well as a number of flutes are formed, wherein the coolant channels and the flutes are in each case formed helically during extrusion. After extrusion, the flutes have a pitch that is adjusted by grinding the flutes to a finished dimension. The method is particularly material-saving. A corresponding cutting head is moreover specified. 1. A method of producing a cutting head that is manufactured from a blank comprising: extruding the blank , wherein a number of coolant channels as well as a number of flutes are formed during the extrusion , wherein the coolant channels and the flutes are each formed helically during extrusion , and wherein , after extruding , the flutes have a pitch that is adjusted by grinding the flutes to a finished dimension.22. The method according to claim 1 , wherein the flutes have an angle of twist (D) that is adjusted after extrusion by changing the pitch.3. The method according to claim 1 , wherein during extrusion claim 1 , an endless blank is produced from which the blank is parted off.4. The method according to claim 3 , wherein the blank is parted off from the endless blank without any sacrificial allowance.5. The method according to claim 1 , wherein the flutes are formed in an outer region that surrounds a core region claim 1 , and that the coolant channels are formed in the core region.6. The method according to claim 1 , wherein the blank is extruded via an extrusion nozzle with a circular aperture into which a shaping projection protrudes for each of the flutes.7. The method according to claim 1 , wherein the blank is sintered after extrusion.8. The method according to claim 1 , wherein the blank is reworked after extrusion by grinding a number of cutting edges into the blank.9. A cutting head which is produced by a method according to . ...

ROTARY CUTTING TOOL HAVING PCD CUTTING TIP

A method of forming a cutting tool includes: providing a PCD coated nib of material formed in the shape of a rotary cutting tip; brazing the nib onto a generally cylindrical rod member disposed about a central longitudinal axis, the generally cylindrical rod member having a number of coolant passages formed therein at a first helix angle relative to the central longitudinal axis; and grinding a number of differential flutes of varying helix angles with respect to the central longitudinal axis into the brazed cylindrical rod and nib, each differential flute being oriented such that a corresponding coolant passage of the number of coolant passages breaks out within a corresponding flute. 16-. (canceled)7. A method of forming a cutting tool , the method comprising:providing a PCD coated nib of material formed in the shape of a rotary cutting tip;brazing the nib onto a generally cylindrical rod member disposed about a central longitudinal axis, the generally cylindrical rod member having a number of coolant passages formed therein at a first helix angle relative to the central longitudinal axis; andgrinding a number of differential flutes of varying helix angles with respect to the central longitudinal axis into the brazed cylindrical rod and nib, each differential flute being oriented such that a corresponding coolant passage of the number of coolant passages breaks out within a corresponding flute.8. The method of wherein each differential flute includes a first portion disposed at or about the first helix angle with respect to the central longitudinal axis claim 7 , a second portion disposed at a second helix angle with respect to the central longitudinal axis claim 7 , and a third portion disposed at third helix angle with respect to the central longitudinal axis; wherein the third portion is disposed between the first and second portions along the central longitudinal axis; and wherein the third helix angle is greater than the first helix angle.9. The method of ...

CONTOUR RAKE FACE CUTTING TOOL

A contoured rake face cutting tool and method of making is disclosed. A rotary cutting tool with a plurality of teeth can cause damage to a work piece during cutting. By orienting the cutting angle of the teeth relative to the rotational central axis to high shear angle such as 50 or 70 degrees, the tool creates a high compression cut which is cleaner and less damaging to the work piece. The cutting surface itself is profiled, i.e. non-planar, such as concave or convex or other non planar shape, which is preferably formed into an ultra-hard material which is supplied for use in a planar form. 1. A cutting tool comprising:a cylindrical body having a central rotational axis, an outer peripheral surface and a central rotational axis and a central midline;a plurality of cutting tips extending from said surface including a first upper set of tips generally in at least one row oriented at a high shear angle, andat least one cutting tip having a curved non planar cutting edge, said cutting edge being hardened.2. The cutting tool of including at least two row of tips a first upper row on one side of the midline and a second lower row set of tips generally on the other side of the midline;at least one of said tips being oriented at a high shear angle relative to said axis of about 50 degrees or greater, where the upper set of tips teeth are oriented at a downward shear angle and the upper set of teeth are oriented at an upward shear angle.3. The cutting tool of wherein the curved cutting edge is concave.4. The cutting tool of wherein the curved cutting edge is convex.5. The cutting tool of wherein the curved cutting edge is serrated.6. The cutting tool of wherein the curved cutting edge is a non-uniform curve.7. The cutting tool of wherein the curved cutting edge is comprised on a plurality of end to end planar segments which together form a generally concave trough surface.8. The cutting tool of wherein the tips are removable and replaceable.9. The cutting tool of wherein ...

METHOD OF JOINING SINTERED PARTS OF DIFFERENT SIZES AND SHAPES

A method of joining a plurality of parts to form a unitary body. At least two sintered parts are provided. At least one of the sintered parts has at least one internal cavity. Each of the parts is formed of a hard metal composition of material. The at least two sintered parts are assembled into the shape of a unitary body. Each of the at least two sintered parts has a joining surface and when each joining surface is brought into contact the surfaces form a bonding interface therebetween. The assembled parts are subjected to a vacuum or gas atmosphere, without the application of external pressure, and to a temperature sufficient to fuse the at least two sintered parts together at the bonding interface to form the unitary body. 1. (canceled)2. (canceled)3. (canceled)4. (canceled)5. (canceled)6. (canceled)7. (canceled)8. (canceled)9. (canceled)10. (canceled)11. (canceled)12. (canceled)13. (canceled)14. (canceled)15. (canceled)16. (canceled)17. (canceled)18. (canceled)19. (canceled)20. (canceled)21. (canceled)22. (canceled)23. (canceled)24. (canceled)25. (canceled)26. A wear resistant tool comprising:a plurality of sintered parts, each of the plurality of sintered parts being formed of a hard metal composition of material, at least one of the sintered parts having at least one internal cavity, wherein the plurality of sintered parts can be assembled into a shape of a unitary body; anda joining surface disposed on each of the plurality of sintered parts, wherein when the parts are assembled each joining surface is brought into contact to form a bonding interface therebetween, such that when the assembled parts are subject to a vacuum or gas atmosphere, without the application of external pressure, and to a temperature sufficient to fuse the plurality of parts, the plurality of sintered parts are joined together at a respective bonding interface to form the unitary body.27. The wear resistant tool of claim 26 , wherein each of the plurality of sintered parts has a ...

Tool holder having insert receiving pocket with stress relief surfaces

A tool holder has a tool body with at least one pocket for receiving at least one cutting insert. The at least one pocket has a support surface and an abutment surface transverse thereto, and a first stress relief surface located between the support surface and the abutment surface. The first stress relief surface extends along a first axis towards a first pocket peripheral surface. A second stress relief surface is formed between the first stress relief surface and the first pocket peripheral surface. The second stress relief surface has a convex shape in a cross-sectional view taken in a second plane containing the first axis. The convex shape may have a radius greater than 0.3 mm.

CUTTING AND DEBURRING TOOL

A cutting and deburring tool according to some embodiments of the disclosure includes a body portion configured to cut a hole in the workpiece, and a workpiece engaging portion and a shaft extending therefrom. The body portion includes a cutting edge configured to cut a hole in a workpiece and deburring cutting edges configured to deburr a first edge of a hole of a workpiece when the body portion is rotated in a clockwise direction or in a counter-clockwise direction after the hole is cut by the body portion. In some embodiments, a second body portion is provided and includes deburring cutting edges configured to deburr a second, opposite edge of the hole when the body portions are rotated in rotated in the clockwise direction or the counter-clockwise direction after the hole is cut by the first body portion. 1. A cutting and deburring tool comprising:a front end, a rear end, a length defined between the front and rear ends, and a central axis defined therebetween around which the cutting and deburring tool is configured to be rotated;a tip at the front end;a body portion extending from the tip, the body portion having a flute having first and second flute edges extending along the body portion thereby forming a body section, one of the flute edges being configured to cut a hole in the workpiece,the flute further comprising first and second deburring cutting edges extending from rear ends of the flute edges and a deburring guide surface extending between the first and second deburring cutting edges, the deburring cutting edges extending in a generally axial direction and being configured to deburr a first edge of the hole of the workpiece;a workpiece engaging portion comprising a cylindrical portion extending rearwardly from the deburring guide surface; anda shank extending from the workpiece engaging portion.2. The cutting and deburring tool of claim 1 , wherein the deburring guide surface is angled relative to the central axis at an angle of approximately 110 ...

DRILL AND METHOD OF PRODUCING DRILLED PRODUCT

According to one implementation, a drill includes the first cutting edges, the second cutting edges and a deflection reducer. The first cutting edges drill a prepared hole to a workpiece. The first cutting edges are formed in a tip side of the drill. The first point angle and each first relief angle of the first cutting edges continuously or intermittently decrease from the tip side toward a rear end side of the drill. The second cutting edges finish the prepared hole. The second cutting edges are formed at positions away in the rear end side from the first cutting edges. The second cutting edges have the second relief angles at a maximum diameter position. The deflection reducer reduces deflection of the second cutting edges. The deflection reducer is formed between the first cutting edges and the second cutting edges. The deflection reducer is inserted into the prepared hole. 1. A drill comprising:at least one first cutting edge for drilling a prepared hole to a workpiece, the at least one first cutting edge being formed in a tip side of the drill, a first point angle of the at least one first cutting edge at a tip position being more than 0 degrees and less than 180 degrees, the first point angle continuously or intermittently decreasing from the tip side toward a rear end side of the drill, a first relief angle of the at least one first cutting edge continuously or intermittently decreasing from the tip side toward the rear end side;at least one second cutting edge for reaming the prepared hole, the at least one second cutting edge being formed at a position away in the rear end side from the at least one first cutting edge, the at least one second cutting edge having a second relief angle at a maximum diameter position of the at least one second cutting edge; anda deflection reducer for reducing deflection of the at least one second cutting edge, the deflection reducer being formed between the at least one first cutting edge and the at least one second cutting ...

ROTARY CUTTING TOOL

A rotary cutting tool or end mill is provided, the tool comprising a plurality of pairs of diametrically-opposed, symmetrical, helical flutes formed in a cutting portion of the tool body, wherein the pitch between at least one pair of adjacent helical flutes is less than or greater than the pitch of at least one other pair of adjacent helical flutes in at least one radial plane along the axial length of the flutes, a plurality of peripheral cutting edges, wherein at least one of the peripheral cutting edges has a radial rake angle different from radial rake angle of a peripheral cutting edge of a different helical flute. 1. A rotary cutting tool comprising: [ is opposed across the common axis by the paired helical cutting edge,', 'has a helix angle which varies by a first function of axial position,', 'has a radial rake angle that is a function of axial position; and, 'a first pair of helical cutting edges in which each helical cutting edge,'}, is opposed across the common axis by the paired helical cutting edge,', 'has a helix angle which varies by a second function of axial position different from said first function,', 'has a radial rake angle that is a function of axial position., 'a second pair of helical cutting edges in which each helical cutting edge,'}], 'a plurality of helical cutting edges having a common axis and common chirality,'}2. The rotary cutting tool of claim 1 , wherein said tool has a cutting portion terminating in a cutting end.3. The rotary cutting tool of claim 2 , wherein said helix angle which varies by a first function of axial position increases with proximity to said cutting end.4. The rotary cutting tool of claim 2 , wherein said helix angle which varies by a first function of axial position decreases with proximity to said cutting end.5. The rotary cutting tool of claim 1 , wherein at least one helical cutting edge has a radial rake angle at a first axial position different from the radial rake angle of another helical cutting edge at ...

ASYMMETRIC END MILLS AND APPLICATIONS THEREOF

In one aspect, rotationally balanced asymmetric end mills are described herein. An end mill described herein comprises a shank portion extending along a longitudinal axis of the end mill, and a cutting portion extending from the shank portion. The cutting portion comprises a plurality of unequally indexed blades separated by flutes along an axial length of cut, the blades extending onto a cutting end surface of the end mill, wherein at least one of the flutes is of unequal length and the asymmetric end mill has an imbalance of 2.0 gmm or less. 1. An asymmetric end mill comprising:a shank portion extending along a longitudinal axis of the end mill; anda cutting portion extending from the shank portion, the cutting portion comprising a plurality of unequally indexed blades separated by flutes along an axial length of cut, the blades extending onto a cutting end surface of the end mill, wherein at least one of the flutes is of unequal length and the asymmetric end mill has an imbalance of 2.0 gmm or less.2. The asymmetric end mill of claim 1 , wherein the blades are disposed at one or more helical angles from the longitudinal axis along the axial length of cut.3. The asymmetric end mill of claim 2 , wherein the helical angle of one blade changes along the axial length of cut.4. The asymmetric end mill of having at least three flutes.5. The asymmetric end mill of having at least four flutes.6. The asymmetric end mill of having an imbalance of 1.0 gmm or less.7. The asymmetric end mill of claim 1 , wherein the cutting portion is of monolithic construction.8. The asymmetric end mill of claim 7 , wherein the cutting portion is brazed to the shank portion.9. The asymmetric end mill of claim 1 , wherein the end mill is a solid end mill.10. The asymmetric end mill of claim 1 , wherein shank portion and the cutting portion are formed of substantially the same material.11. The asymmetric end mill of claim 1 , wherein the shank portion and the cutting portion are formed of ...

CUTTING TOOL AND MANUFACTURING METHOD THEREOF

A cutting tool according to an aspect of the present disclosure includes a cutting edge portion which contains at least one of cubic boron nitride and polycrystalline diamond. The cutting edge portion includes a rake face, a flank face, and a cutting edge. The flank face is contiguous to the rake face. The cutting edge is provided as a ridge line between the rake face and the flank face. The radius of curvature of the cutting edge is 2 μm or more and 8 μm or less. 1. A cutting tool comprising a cutting edge portion which contains at least one of cubic boron nitride and polycrystalline diamond ,the cutting edge portion including a rake face, a flank face contiguous to the rake face, and a cutting edge provided as a ridgeline between the rake face and the flank face,a radius of curvature of the cutting edge being 2 μm or more and 8 μm or less.210-. (canceled)11. The cutting tool according to claim 1 , wherein the radius of curvature varies along the extending direction of the cutting edge.12. The cutting tool according to claim 1 , wherein the arithmetic average roughness of the surface of the cutting edge is 0.05 μm or more and 2 μm or less.13. The cutting tool according to claim 12 , wherein the arithmetic average roughness varies along the extending direction of the cutting edge.14. The cutting tool according to claim 1 , whereinthe cutting tool is an end mill,the cutting edge extends along a direction from a tip end of the cutting tool toward a shank thereof,the radius of curvature decreases along the direction from the tip end toward the shank.15. A cutting tool comprising a cutting edge portion which contains at least one of cubic boron nitride and polycrystalline diamond claim 1 ,the cutting edge portion including a negative land, a flank face contiguous to the negative land, and a cutting edge provided as a ridgeline between the negative land and the flank face,a radius of curvature of the cutting edge being 2 μm or more and 8 μm or less.16. The cutting tool ...

Solid-lubricated metal cutter and processing method thereof

A solid-lubricated metal cutter and processing method relates to the technical field of metal cutters. A surface texture morphology is worked out on a metal cutter, a solid lubricant is filled into the surface texture morphology, and a convex dam is arranged on the cutter surface on which surface texture morphology is located at a chip flow side. The surface texture morphology has micro-pit and micro-boss features, and can exert antifriction effect of a solid lubricant and anti-adhesion effect of micro-protrusions. The convex dam is arranged at an end of the micro-texture region away from the cutting blade, so that a part of the solid lubricant flows back to the texture region and thereby the utilization efficiency and retentiveness of the solid lubricant are improved.

TWIST DRILL AND PRODUCTION METHOD

The twist drill () has a drilling head (), a continuous two-flute, three-flute to six-flute helix () and an insertion end () that are arranged consecutively on a drill axis (). The helix () has a radial outer dimension () that varies periodically two, three to six times per revolution around the drill axis (). The invention also relates to a production method for such a drill. 111-. (canceled)12. A production method for a twist drill comprising the following steps:milling a plurality of depressions into a circumferential surface of a blank in order to form a network of ribs, first ribs of the ribs being parallel to each other and running along an axis of the blank, while second ribs of the ribs are parallel to each other and run at an angle of inclination slanted relative to the first ribs;milling grooves into sections of the first ribs situated between adjacent second ribs; andforming a drilling head on an end face of the milled blank.13. The production method as recited in wherein the depressions are milled in rows oriented parallel to each other and along the axis.14. The production method as recited in wherein the depressions adjacent to each other along the axis overlap along the axis.15. The production method as recited in wherein the depressions adjacent to each other in a circumferential direction are at a distance from each other in the circumferential direction.16. The production method as recited in wherein a surface of the depressions is concave in every direction.17. The production method as recited in wherein the grooves run parallel to the second ribs.18. The production method as recited in wherein a surface of the grooves is convex in a direction parallel to the second ribs.19. The production method as recited in wherein the grooves are milled at a depth deviating by less than 10% from a depth of the depressions.20. A twist drill comprising:a drilling head; a continuous two-flute, three-flute to six-flute helix; and an insertion end arranged ...

Tool, Method and Machine for Producing a Tooth Profile on a Workpiece by Skiving

A tool, a method and a machine for producing a tooth profile by performing a coupled skiving movement between a skiving tool and the workpiece, by rotating the tool about a tool axis of rotation and rotating the workpiece about a workpiece axis of rotation. The tool includes a crown gear, on the front of which a tooth system with a cutting profile is located, which when in use reproduces the tooth profile on the workpiece.

ROTARY CUTTING TOOL HAVING PCD CUTTING TIP

A rotary cutting tool with an elongate body disposed about a longitudinal axis, the elongate body including a helical flute and a polycrystalline-diamond cutting tip. The cutting tip comprises an inner portion having an inner point angle and an outer portion having an outer point angle different from the inner point angle. 1. A method for forming a rotary cutting tool having a polycrystalline-diamond cutting tip , the method comprising:forming at least two coolant passages in a generally cylindrical tool body;forming at least two coolant passages in a tip portion, the tip portion being separate from the tool body; andcoupling the tip portion to the tool body to form the rotary cutting tool.2. The method according to claim 1 , wherein the tip portion is coupled to the tool body via a brazing process.3. The method according to claim 1 , wherein the at least two coolant passages are formed in the generally cylindrical tool body by an extrusion process.4. The method according to claim 1 , wherein the at least two passages are formed in the tip portion via an EDM drilling process.5. The method according to claim 1 , wherein the generally cylindrical tool body comprises:an elongate body disposed about a longitudinal axis;the elongate body including a helical flute.6. The method according to claim 5 , wherein the tip portion comprises a polycrystalline diamond cutting tip.7. The method according to claim 5 , wherein the elongate body is formed from a carbide material.8. The method according to claim 5 , wherein the elongate body comprises:a first end opposite the cutting tip;wherein each of the at least two coolant passages extends from the first end to the cutting tip.9. The method according to claim 1 , wherein each of the at least two coolant passages of the elongate body is generally helical in shape.10. The method according to claim 9 , wherein each of the at least two coolant passages of the tip portion comprises a straight passageway.11. The method according to ...

REUSING METHOD OF END MILL

A reusing method of an end mill , in which an end mill () has a margin which is a part of a circle having a diameter identical to a diameter of a shank part (), the margin being provided on an outer edge of a cutting part (), a base material of the end mill () is machined in advance so as to have coaxiality having equal accuracy to coaxiality for the cutting part (), the shank part () is an unmachined part left without cutting the base material, the margin is a part of an outer peripheral surface of the base material left without cutting the base material when the outer edge is formed by cutting the base material, and when the cutting part () is worn out, the cutting part () is cut off and a new cutting part is machined on the shank part () while a part of outer peripheral surface of the shank part is left as the margin without cutting, the new cutting part having accuracy of coaxiality and an outer diameter identical to those of the cutting part (). 1. A reusing method of an end mill comprising a columnar shank part and a cutting part integrated with the shank part , whereinthe end mill has a margin which is a part of a circle having a diameter identical to a diameter of the shank part, the margin being provided on an outer edge of the cutting part in cross-section orthogonal to an axial direction;a base material of the end mill is machined in advance so as to have coaxiality having equal accuracy to coaxiality for the cutting part;the shank part is an unmachined part left without cutting the base material;the margin is a part of an outer peripheral surface of the base material left without cutting the base material when the outer edge is formed by cutting the base material; andwhen the cutting part is worn out, the cutting part is cut off and a new cutting part is machined on the shank part while a part of the outer peripheral surface of the shank part is left as the margin without cutting and without additional machining for ensuring formation of a new outer ...

METHOD AND MACHINE EQUIPMENT FOR MANUFACTURING OF A CUTTING TOOL

A method for multistep machining a cutting tool includes defining a data set of the cutting tool, positioning the workpiece in a machining device, determining a data set of the workpiece to be machined, defining at least one machining program based on the defined data set in relation to the determined data set of the workpiece, subjecting the workpiece to the at least one machining program, to obtain intermediate geometries of the workpiece, determining a second data set by measuring means including the intermediate geometries of the workpiece and transferring the machined workpiece to a second machining device. Furthermore, the steps of positioning, determining data set of the workpiece, defining machining program, subjecting the workpiece to the machining program, determining a second data set and transferring to the second machining device are repeated until the workpiece takes on the shape of the target geometries. 1. Method for multistep machining a cutting tool , comprising the steps:a) Defining a data set of the cutting tool comprising target geometries of the cutting tool, parameters of materials of the cutting tool and/or parameters of process operations for machining a workpiece into the cutting tool;b) Positioning the workpiece in a machining device;c) Determining a data set of the positioned workpiece to be machined by a measuring method comprising actual geometries of shape, positional and orientation data of the positioned workpiece;d) Defining at least one machining program for the machining device based on the defined data set of the cutting tool in relation to the determined data set of the workpiece;e) Subjecting the workpiece to the at least one machining program, thereby obtaining intermediate geometries of the workpiece;f) Determining a second data set of the workpiece by measuring means comprising the intermediate geometries of the workpiece;g) Transferring the machined workpiece to a second machining device;h) Repeating steps b) to g) until ...

CUTTING INSERTS AND CUTTING TOOL SYSTEMS HAVING SINUSOIDAL AND HELICAL CUTTING EDGES

A cutting tool system is designed to have a combined sinusoidal-shaped and helical-shaped cutting edge formed by an assembly of aligned common cutting inserts each having a sinusoidal and helical cutting edge. 1. A cutting tool system comprising:a tool holder comprising a plurality of common insert pockets positioned in a helical orientation about a longitudinal axis of the tool holder; anda plurality of common cutting inserts removably attachable to the plurality of common insert pockets in the tool holder to form at least one cutting flute on the tool holder, the at least one cutting flute comprising a helical grouping of common cutting inserts positioned in the insert pockets;wherein the common cutting inserts each comprise at least one sinusoidal and helical cutting edge; andwherein the at least one cutting flute comprises a sinusoidal and helical cutting edge positioned about the longitudinal axis of the tool holder and formed by alignment of the individual sinusoidal and helical cutting edges of the common cutting inserts that comprise the at least one cutting flute.2. The cutting tool system of claim 1 , wherein the at least one sinusoidal and helical cutting edge of the common cutting inserts comprises a shape comprising one sinusoidal wavelength.3. The cutting tool system of claim 1 , wherein the common cutting inserts each comprise two or more sinusoidal and helical cutting edges that are indexable in the insert pockets.4. The cutting tool system of claim 1 , wherein the common cutting inserts each comprise two sinusoidal and helical cutting edges that are indexable in the insert pockets.5. The cutting tool system of claim 1 , wherein the common cutting inserts each comprise four sinusoidal and helical cutting edges that are indexable in the insert pockets.6. The cutting tool system of claim 1 , further comprising an end-face cutting insert removably attachable to an insert pocket positioned at an engaging end of the tool holder claim 1 , the end-face ...

TWIST DRILL AND METHOD OF DRILLING COMPOSITE MATERIALS, USE AND METHOD REGRINDING AND MANUFACTURING THEREOF

A twist drill for drilling composite materials includes a shank; a drill body; a drill tip having a cutting edge, a chisel edge, and a secondary chisel edge, wherein the secondary chisel angle of the drill tip is 145° to 165 and the point angle is 70° to 100°; and a flute extending from the drill tip to the drill body. The flute has a constant helix, and the helix angle of the flute being selected from the range 45° to 55°. A method of drilling a composite material comprising fibres uses the twist drill of the present embodiment. Suitably, the composite material is carbon fibre reinforced plastic or glass fibre reinforced plastic, and optionally being a laminate material such that the method comprises stack drilling. Embodiments achieve a combination of good hole quality, good tool life and good hole size spread. 1. A twist drill for drilling composite materials , the twist drill comprising:a shank;a drill body;a drill tip including a cutting edge, a chisel edge, and a secondary chisel edge, wherein a secondary chisel angle is 145° to 165°, the drill tip also having a point angle of 70° to 100°; anda flute extending from the drill tip to the drill body, the flute having a constant helix, and a helix angle of the flute being selected from the range 45° to 55°.2. The twist drill according to claim 1 , wherein the drill tip has a primary facet extending behind the cutting edge and a secondary facet extending behind the primary facet claim 1 , wherein a relief angle of the primary facet is 15° to 25° claim 1 , and a relief angle of the secondary facet is 15° to 30°.3. The twist drill according to claim 1 , wherein the drill tip has an axial rake angle of 5° to 8°.4. The twist drill according to claim 1 , wherein the drill tip has a point angle of 85° to 88°.5. The twist drill according to claim 1 , wherein the secondary chisel angle is 145° to 155°.6. The twist drill according to claim 1 , wherein the flute has a right hand helix.7. A method of drilling composite ...

Cutting tool and method for manufacturing a cutting tool

A cutting tool, in particular for machining metal, is described. It comprises a tool main body that has at least one interface for receiving a cutting insert that can be attached to the tool main body. At least one cooling duct is provided in the tool main body and has, at its end on the interface side, an outlet section with an elongate outlet cross-section on the interface side. The tool main body is manufactured at least in sections by means of a generative manufacturing process. A method for manufacturing such a cutting tool is also presented.

DRILLING TOOL FOR MACHINE TOOLS AND METHOD FOR THE PRODUCTION THEREOF

The invention relates to a drilling tool for machine tools has a drill body, a cutting head arranged on the front face of the drill body and a shaft arranged at the end thereof, wherein the drill body has two chip flutes, which are delimited at their flanks by ribs and a first chip flute of which is spirally curved. A second chip flute is not spiraled or is spirally curved with a pitch differing from the first chip flute, preferably running in the same direction of rotation. 23234. The method as claimed in claim 1 , characterized in that the first deep-hole bore (′) is incorporated after the introduction of the first straight groove claim 1 , and in that the second deep-hole bore (′) is incorporated after the introduction of the second straight groove.324. The method as claimed in claim 1 , characterized in that the prefabricated blank is twisted in a helical shape in the same rotation direction as the helix of the second chip flute ().424. The method as claimed in claim 1 , characterized in that the prefabricated blank is twisted in a helical claim 1 , shape in the opposite rotation direction to the helix of the second chip flute ().63234. The method as claimed in claim 5 , characterized in that the first deep-hole bore (′) is incorporated after the introduction of the first straight groove claim 5 , and in that the second deep-hole bore (′) is incorporated after the introduction of the second straight groove.82426242626. The method as claimed in claim 7 , characterized in that the two chip flutes ( claim 7 , ) are incorporated helically in opposite senses in the blank claim 7 , and in that the blank that has been produced in this way is then twisted such that the chip flutes ( claim 7 , ) are helical in the same sense claim 7 , or such that one of the chip flutes () is not helical.1032342426. The method as claimed in claim 9 , characterized in that the coolant channels ( claim 9 , ) on the cutting-head side are milled in an untwisted claim 9 , preferably straight ...

BASE MATERIAL FOR HARD SINTERED MATERIAL, HARD SINTERED MATERIAL, AND CUTTING TOOL

A base material for a hard sintered material has a multi-stage columnar shape having a central axis and extending in an axial direction of the central axis. The base material includes a smaller-diameter portion, a larger-diameter portion, a base material end surface located between a one end portion in the axial direction of an outer peripheral surface of the larger-diameter portion and the other end portion in the axial direction of the smaller-diameter portion, and facing toward the one end portion in the axial direction, and a first inclined portion disposed in at least a portion in a circumferential direction of an annular corner portion to which an outer peripheral surface of the larger-diameter portion and the base material end surface are connected. The first inclined portion is located inward in a radial direction toward the one end portion in the axial direction. 1. A base material for a hard sintered material having a multi-stage columnar shape having a central axis and extending in an axial direction of the central axis , the base material comprising:a smaller-diameter portion;a larger-diameter portion having an outer diameter larger than an outer diameter of the smaller-diameter portion;a base material end surface located between a one end portion of an outer peripheral surface of the larger-diameter portion in the axial direction and the other end portion of the smaller-diameter portion in the axial direction, and facing toward the one end portion in the axial direction; anda first inclined portion disposed in at least a portion of an annular corner portion in a circumferential direction where the outer peripheral surface of the larger-diameter portion and the end surface of the base material are connected, whereinthe first inclined portion is located inward in a radial direction toward the one end portion in the axial direction.2. The base material for a hard sintered material according to claim 1 ,wherein in a vertical sectional view along the central ...

TWIST DRILL TIPS, PRECURSOR CONSTRUCTIONS FOR USE IN MAKING SAME, AND METHODS FOR MAKING AND USING SAME

A tip for twist drill, comprising a super-hard structure joined to a substrate at an interface boundary coterminous with an end of the substrate, the super-hard structure comprising sintered polycrystalline material comprising super-hard grains, the super-hard structure defining a super-hard end surface opposite the interface boundary and a plurality of cutting edges configured for boring into a body in use; the super-hard end surface including a centre point or chisel edge, and comprising a plurality of surface regions configured such that respective planes tangential to each of the surface regions are disposed at substantially different angles from the axis of rotation of the tip in use. Precursor constructions for use in manufacturing the tips as well as methods for making the precursor constructions and the tips are disclosed. 1. A tip for twist drill , comprisinga super-hard structure joined to a substrate at an interface boundary coterminous with an end of the substrate, substantially the entire end of the substrate being joined to the super-hard structure, substantially no area of the end of the substrate being exposed;the super-hard structure comprising sintered polycrystalline material comprising super-hard grains, and defining a super-hard end surface opposite the interface boundary and a plurality of cutting edges configured for boring into a body in use;the super-hard end surface comprising a centre point or chisel edge at an apex; a first surface region depending from the apex and a second surface region depending from the first surface region, the first and second surface regions defining an inflection angle between them, and configured such that respective planes tangential to each of the surface regions are disposed at substantially different angles from an axis of rotation of the tip in use and at least 5 degrees with respect to each other.2. A tip as claimed in claim 1 , in which the super-hard structure comprises polycrystalline diamond (PCD) ...

METHOD FOR MANUFACTURING HIGH-TORQUE HEXAGONAL DRILL SHANK

A method for manufacturing a high-torque hexagonal drill shank includes: firstly producing an air module, wherein the lower end of the air module is inserted into a molding cavity of a mold, a high-pressure air is injected into the air module, and the surface of the air module is provided with a plurality of air outlets; evenly mixing metal powder and an organic binder together; injecting obtained particulates in a heating-plasticizing state into the molding cavity by an injection molding machine to solidify and form a hexagonal drill shank blank; forming a non-cylindrical cavity inside the hexagonal drill shank blank under the action of the air module; removing the binder in the hexagonal drill shank blank by thermal decomposition; and, finally, obtaining a high-torque hexagonal drill shank by sintering and densifying. 1. A method for manufacturing a high-torque hexagonal drill shank , comprising the following steps:(1) producing an air module, wherein a lower end of the air module is inserted into a molding cavity of a mold, an axis of the air module and an axis of the molding cavity are collinear, a high-pressure air of 150-180 bar is injected into the air module, and a surface of the air module is provided with a plurality of air outlets;(2) evenly mixing metal powder and an organic binder together to obtain particulates;(3) injecting the particulates in a heating-plasticizing state into the molding cavity by an injection molding machine to solidify to form a hexagonal drill shank blank, wherein an injection pressure is 140 bar;(4) forming a non-cylindrical cavity inside the hexagonal drill shank blank under an action of the air module, wherein a plane is arranged on a lateral side of the non-cylindrical cavity;(5) removing the organic binder in the hexagonal drill shank blank by thermal decomposition;(6) performing surface processing and deburring on the hexagonal drill shank blank; and(7) obtaining a high-torque hexagonal drill shank by sintering and ...

METHOD FOR PRODUCING CUTTING BLADES

Disposable cutting blades and method for producing disposable cutting blades with profiled cross sections for a device for chipping wood. The method includes heating a primary material of a hardenable material in a soft-annealed state having a worked surface to a temperature above room temperature, but below a conversion temperature Ac1, rolling the primary material to form a profile blank with at least one precisely gaged guide path in a base body in cross section and with an increased thickness of at least one edge region, a metal-removing working of at least one edge region in a longitudinal direction of the profile blank to form a cutting edge and to form scratching edges in a spaced manner directed perpendicularly to the cutting edge, and continuously hardening the edge regions of the cutting blade. 1. A method for producing disposable cutting blades with profiled cross sections for a device for chipping wood , the method comprising:heating a primary material of a hardenable material in a soft-annealed state having a worked surface to a temperature above room temperature, but below a conversion temperature Ac1;rolling the primary material to form a profile blank with at least one precisely gaged guide path in a base body in cross section and with an increased thickness of at least one edge region;a metal-removing working of at least one edge region in a longitudinal direction of the profile blank to form a cutting edge and to form scratching edges in a spaced manner directed perpendicularly to the cutting edge; andcontinuously hardening the edge regions of the cutting blade.2. The method according to claim 1 , wherein the hardenable material comprising hardenable steel or a hardenable alloy.3. The method according to claim 1 , wherein the temperature is achieved within a range of a cubic-space-centered atomic structure of the material.4. The method according to claim 1 , wherein the profile blank is rolled with an overfilled groove.5. The method according to ...

ROTARY DRILL BIT AND METHOD FOR DESIGNING A ROTARY DRILL BIT FOR DIRECTIONAL AND HORIZONTAL DRILLING

A multi-layer downhole drilling tool designed for directional and horizontal drilling is disclosed. The drilling tool includes a bit body including a rotational axis extending therethrough. A plurality of primary blades are disposed on exterior portions of the bit body and a plurality of secondary blades are disposed on exterior portions of the bit body between the primary blades. The drilling tool further includes a plurality of first-layer cutting elements disposed on exterior portions of the primary blades and a plurality of second-layer cutting elements disposed on exterior portions of the secondary blades. The second-layer cutting elements are track set with the first-layer cutting elements in an opposite track set configuration. 1. A multi-layer downhole drilling tool designed for directional and horizontal drilling , comprising:a bit body with a rotational axis extending therethrough;a plurality of primary blades disposed on exterior portions of the bit body;a plurality of first-layer cutting elements disposed on exterior portions of the primary blades;a plurality of secondary blades disposed on exterior portions of the bit body between the primary blades; anda plurality of second-layer cutting elements disposed on exterior portions of the secondary blades, the second-layer cutting elements track set with the first-layer cutting elements in an opposite track set configuration.2. The drilling tool of claim 1 , wherein the second-layer cutting elements are under-exposed with respect to the first-layer cutting elements.3. The drilling tool of claim 2 , wherein an amount of under-exposure between the second-layer cutting elements and the first-layer cutting elements is based on a critical depth of cut control curve.4. The drilling tool of claim 2 , further comprising a plurality of third-layer cutting elements disposed on exterior portions of the secondary blades claim 2 , the third-layer cutting elements track set with at least one of the first-layer cutting ...

Method for manufacturing machining tool

A method of manufacturing a machining tool in which an insert holder comprises a first surface, a second surface opposite the first surface, and a first insert tip slot extending between the first surface and the second surface. The first insert tip slot is configured so as to be compressed and densified to support a first insert tip. The insert holder further includes elevated projections extending from the first and second surfaces proximate the first insert tip slot.

INDUCED MATERIAL SEGREGATION METHODS OF MANUFACTURING A POLYCRYSTALLINE DIAMOND TOOL

Induced material segregation methods of manufacturing a polycrystalline diamond compact (PDC) cutter result in formation of a polycrystalline diamond/tungsten carbide (WC) composite material having a smooth compositional gradient from maximum WC concentration at one face to maximum diamond concentration at another face. Because the compositional gradient is smooth, very little or no mismatch of coefficient of thermal expansion occurs, which improves a service lifetime of the PDC cutter. 1. A method of manufacturing a polycrystalline diamond compact (PDC) cutter , the method comprising:introducing a polycrystalline diamond particulate, a substrate particulate, and a binder in a reactor, wherein the binder is a solid phase material at room temperature;performing induced segregation of the polycrystalline diamond particulate and the substrate particulate in the reactor to form a segregated mixture having a continuous compositional gradient of the polycrystalline diamond particulate and the substrate particulate along an axis of the segregated mixture;consolidating the segregated mixture to form a green-state material, including the binder immobilizing the polycrystalline diamond particulate and the substrate particulate in the green-state material;performing a high-temperature high-pressure (HTHP) sintering process on the green-state material to form the PDC cutter, including applying sintering process conditions to eliminate the binder during the HTHP sintering process.2. The method of claim 1 , further comprising:applying the binder prior to introduction into the reactor as a coating to at least one of the polycrystalline diamond particulate and the substrate particulate.3. The method of claim 1 , wherein the binder includes a material that modifies the diffusion of a catalyst used in the HTHP sintering process.4. The method of claim 1 , wherein performing the induced segregation further comprises:using at least one of: a fluidized bed segregation process; a ...

Manufacturing Process, Tool Stand, and Drill Bit

A drill bit includes a drill bit head, a multi-strand helix made up of three or more helix ribs, and a shank end along a drill bit axis. The multi-strand helix is made up of a conveyance area, a helix gradient, and a pitch. The helix ribs extend parallel to the drill bit axis in a first area adjacent to the drill bit head and a second area adjacent to the shank end. 1. A drill bit , comprising:a drill bit head, a multi-strand helix made up of three or more helix ribs, and a shank end along a drill bit axis;wherein the multi-strand helix is made up of a conveyance area, a helix gradient, and a pitch;wherein the helix ribs extend parallel to the drill bit axis in a first area adjacent to the drill bit head and a second area adjacent to the shank end.2. The drill bit according to claim 1 , wherein a cross-section of the multi-strand helix is constant from the drill bit head to the second area adjacent to the shank end.3. The drill bit according to claim 1 , wherein the helix gradient constantly increases in size in a direction of the drill bit head in the first area adjacent to the drill bit head claim 1 , across from the drill bit axis claim 1 , with a rate between 0.25 degrees and 2 degrees per degree in the direction of rotation of the multi-strand helix.4. The drill bit according to claim 1 , wherein the drill bit head has break-off edges parallel to the drill bit axis. This is a divisional application of prior U.S. application Ser. No. 16/062,537, filed Jun. 14, 2018, which claims the priority of International Application No. PCT/EP2016/079815, filed Dec. 6, 2016, and European Patent Document No. 15200036.0, filed Dec. 15, 2015, the disclosures of which are expressly incorporated by reference herein.The present invention involves a production method for drill bits plus a drill bit and a tool stand for carrying out a production method for a drill bit.The inventive production method for a drill bit with a helix has the following steps: cold reshaping of a rod-shaped ...

METHOD FOR DESIGNING A CUTTING EDGE OF A CUTTING TOOL, CUTTING TOOLS COMPRISING THE SAME, AND CUTTING ELEMENTS WITH MULTIPLE SUCH CUTTING PORTIONS

A method for designing a cutting edge of a cutting element configured for removing material from a workpiece to leave therein a desired end profile (B,B,B). The method comprises the steps of modeling a desired end profile (B,B,B) of the workpiece, the profile having a longitudinal axis and being defined by a bottom surface (B), a side surface (B) and an adjustment surface (B) extending therebetween; defining a lead profile plane (RP) and an trail profile plane (RP) spaced therefrom, each of the planes being oriented perpendicular to the longitudinal axis; determining a profile contour defined by the intersection line between the end profile (B,B,B) and the lead profile plane (RP). The contour profile includes a bottom contour, an adjoining contour and a side contour defined as the intersection lines between the lead profile plane (RP) and the bottom surface (B), the adjustment surface (B) and the side surface (B) respectively; designing a rake surface and a relief surface, the intersection line between which defines a cutting edge lying in the adjoining surface (B) and spanning between the lead profile plane (RP) and the trail profile plane (RP). The cutting edge is designed such that in any reference plane (RP; FIG. A) oriented perpendicularly to the cutting edge, the intersection between each of the rake surface and the relief surface with the reference plane (RP) defines a respective rake line (RK; FIG. ) and relief line (RF; FIG. ), the angle (θ) between the lines RK,RF) being equal to or smaller than a similar angle (θ) taken along each of a plurality of similar reference planes (RP) disposed between the reference plane (RP) and the lead profile plane (RP) 1. A method for designing a cutting edge of a cutting element configured for removing material from a workpiece to leave therein a desired end profile , said method comprising:modeling a desired end profile of the workpiece, said profile having a longitudinal axis and being defined by a bottom surface, a side ...

ROTARY CUTTING TOOL WITH COOLANT PASSAGES AND METHOD OF MAKING SAME

A method of manufacturing a rotary cutting tool is described. The rotary cutting tool defines a central longitudinal axis and includes a shank portion and a cutting portion adjoining the shank portion. The shank portion has a shank end and the cutting portion has a cutting end opposite the shank end. One or more blades are separated by a flute. A main, internal coolant passage extends from the shank end, through the shank portion, and into the cutting portion. The method includes forming at least one secondary coolant passage in fluid communication with the main, internal coolant passage in which the at least one secondary coolant passage is formed by using electro-magnetic radiation. 1. A method of manufacturing a rotary cutting tool , the rotary cutting tool defining a central longitudinal axis and comprising a shank portion , a cutting portion adjoining the shank portion , the shank portion has a shank end , the cutting portion has a cutting end opposite the shank end , one or more blades separated by a flute , and a main , internal coolant passage extending from the shank end through the shank portion and into the cutting portion , the method comprising forming at least one secondary coolant passage in fluid communication with the main , internal coolant passage , wherein the at least one secondary coolant passage is formed by using electro-magnetic radiation.230. The method of claim 1 , wherein the at least one secondary coolant passage () is circular in cross-sectional shape.3. The method of claim 1 , wherein the at least one secondary coolant passage is non-circular in cross-sectional shape.42. The method of claim 1 , wherein the at least one secondary coolant passage is formed is formed at an angle claim 1 , A claim 1 , with respect to the central claim 1 , longitudinal axis of the rotary cutting tool.52. The method of claim 4 , wherein the angle claim 4 , A claim 4 , is equal to 90 degrees.62. The method of claim 4 , wherein the angle claim 4 , A claim 4 , ...

CUTTING TOOL AND METHOD FOR PRODUCING A CUTTING TOOL

The cutting tool (), especially drill or milling cutter, comprises a base () which extends in an axial direction () and has an outer shell () with at least one interior recess () that extends in the axial direction (), a supporting structure () having at least one separating piece () which separates a plurality of recesses () from each other being formed in the supporting structure. The cutting tool () is particularly a solid hard-metal tool. The supporting structure () ensures an efficient use of material. 1. A cutting tool , in particular a drill , comprising a base body extending in an axial direction , having an outer shell with at least one inner recess extending axially ,wherein within the outer shell a support structure is formed with at least one separating web by means of which a plurality of recesses are separated from each other.2. The cutting tool according to claim 1 ,wherein the support structure is grid-like when viewed in cross section.3. The cutting tool according to claim 1 ,wherein the outer shell is approximately annular and surrounds at least one centered central space.4. The cutting tool according to claim 1 ,wherein the supporting structure is designed as a separate insert.5. The cutting tool according to claim 1 ,wherein the supporting structure is formed of a material that is different from the material of the outer shell.6. The cutting tool according to claim 1 ,wherein the base body is a sintered body.7. The cutting tool according to claim 1 ,wherein the base body has a clamping shank and a cutting element, wherein at least a plurality of recesses are continued in the cutting element in the axial direction and a total cross-sectional area of the recesses in the cutting element is less than a total cross-sectional area of the recesses in the clamping shaft.8. The cutting tool according to claim 1 ,wherein the base body has a clamping shank and a cutting element and the outer shell and the support structure in the clamping shank have a ...

METHOD OF MANUFACTURING CEMENTED CARBIDE CUTTING TOOL AND CUTTING TOOL MANUFACTURED BY THE METHOD

Method of manufacturing a cemented carbide cutting tool, includes a) bonding a body part of hot work tool steel and a cutting part of cemented carbides together by heat treatment; b) cooling the bonded body part and cutting part for a preset period of time; c) machining the cutting part to have a predetermined pattern according to its application and forming a cutting tool; d) coating a surface of the machined cutting tool with a film of at least one of metallic oxides, nitrides and carbides; and e) cooling the coated cutting tool for a preset period of time in air, and a cutting tool manufactured by the method. Cracks do not generate even after the coating step, and thus cemented carbide cutting tool having excellent mechanical properties may be manufactured. 1. A method of manufacturing a cemented carbide cutting tool , comprising:a) bonding a body part of hot work tool steel and a cutting part of cemented carbides together by heat treatment;b) cooling slowly the bonded body part and cutting part for 24 hours in a vacuum chamber;c) machining the cutting part to have a predetermined pattern according to its purpose and forming a cutting tool;d) coating a surface of the machined cutting tool with a film of at least one of a metallic oxide, a nitride and a carbide so as to enhance mechanical properties of the cutting tool; ande) cooling the coated cutting tool for a preset period of time in air.2. The method of claim 1 , wherein the hot work tool steel is SKD61 and the step a) comprises bonding the body part and the cutting part at a temperature of 800 to 1200° C. by high-frequency welding or oxygen welding.3. (canceled)4. The method of claim 1 , wherein the step c) comprises grinding the cutting part by a relief grinder so that a plurality of blades having the same cutting relief angle are formed of a curved shape in a circumferential direction of the cutting part.5. The method of claim 1 , wherein the step d) comprises depositing a titanium aluminum nitride (TiAlN) ...

HIGH SHEAR CUTTING TOOL

A high shear angle cutting tool and method of making is disclosed. A rotary cutting tool with a plurality of teeth can cause damage to a work piece during cutting. By orienting the cutting angle of the teeth relative to the rotational central axis to high shear angle such as 50 or 70 degrees, the tool creates a high compression cut which is cleaner and less damaging to the work piece. 1. A cutting device comprising:a cylindrical body having a central rotational axis, an outer peripheral surface and a central rotational axis and a central midline;a plurality of cutting teeth extending from said surface including a first upper set of teeth generally on one side of the midline and a second lower set of teeth generally on the other side of the midline,at least one of said teeth being oriented at a high shear angle relative to said axis of about 50 degrees or greater, where the upper set of teeth are oriented at a downward shear angle and the upper set of teeth are oriented at an upward shear angle.2. The cutting tool of wherein said cutting teeth are all oriented at a high shear angle of 50 degrees or greater.3. The cutting device of wherein at least one of said teeth includesa. a generally vertical leading wall with a cutting edgeb. a first sloping wall abutting said cutting edge and sloping downwardly toward the central axis and away from said cutting edge.4. The cutting device of further including a second sloping wall abutting said first sloping way and sloping downwardly toward the central axis and away from the cutting edge at an angle equal to or greater than the slope of the first wall.5. The cutting device of wherein said first and second sloped walls are discontinuous and separated by a further connecting wall.6. The cutting device of further including a concave section between said second wall and said base.7. A cutting device comprising:a cylindrical body having a central rotational axis, an outer peripheral surface and a central rotational axis and a ...

Cutting Tool

A cutting tool may include a cutter body, and a cutting insert group coupled to the cutter body, wherein the cutter body includes a working length, wherein the cutting insert group forms a continuous cutting edge, and wherein the continuous cutting edge extends continuously through the working length of the cutter body. 1. A cutting tool comprising:a cutter body; anda cutting insert group coupled to said cutter body,wherein said cutter body comprises a working length,wherein said cutting insert group forms a continuous cutting edge, andwherein said continuous cutting edge extends continuously through said working length of said cutter body.2. The cutting tool of wherein said continuous cutting edge is precision-ground.3. The cutting tool of wherein said continuous cutting edge is helical.4. The cutting tool of wherein said cutting insert group comprises a plurality of cutting inserts arranged in an end-to-end orientation claim 1 , and wherein said cutting inserts comprise metal carbide5. The cutting tool of further comprising a flute formed in said cutter body claim 1 , wherein said flute extends through said working length of said cutter body claim 1 , and wherein said cutting insert group is coupled to said cutter body within said flute.6. The cutting tool of wherein said flute is helical.7. The cutting tool of wherein said cutting insert group comprises a plurality of cutting inserts arranged in an end-to-end orientation along said flute.8. The cutting tool of wherein said cutting inserts comprise metal carbide.9. The cutting tool of further comprising a plurality of pockets formed in said cutter body along said flute claim 7 , wherein said plurality of cutting inserts is removably coupled to said cutter body within said plurality of pockets.10. The cutting tool of wherein each pocket defines cutting insert support surfaces supporting a cutting insert.11. A cutting tool comprising:a cutter body comprising a longitudinal axis and a working length;a flute formed in ...

CUTTING INSERT WITH INTERNAL COOLANT PASSAGES AND METHOD OF MAKING SAME

A cutting insert () includes a body () having a top face (), a bottom face () opposite the top face (), and at least one flank face (). A coolant inlet aperture (), a coolant outlet aperture (), and an internal coolant passage () in fluid communication with the coolant inlet aperture () and the coolant outlet aperture () are formed using electro-magnetic radiation. The coolant inlet aperture () can be formed in the top face (), the bottom face () and/or the flank face (), and the coolant outlet aperture () can be formed in any different face (). A method of forming the internal coolant passages () is described. 1. A toolholder assembly comprising:a body portion and a cutting end portion extending from the body portion, the cutting end portion including a pocket having a bottom support surface and at least one side support surface;a cutting insert mounted in the pocket, the cutting insert having a top face, a bottom face opposite the top face, at least one flank face, a coolant inlet aperture formed in one of the top face, the bottom face, and the at least one flank face, a coolant outlet aperture formed in a different one of the top face, the bottom face and the at least one of the flank face, and an internal coolant passage in fluid communication with the coolant inlet aperture and the coolant outlet aperture,wherein the coolant inlet aperture, the at least one internal coolant passage and the coolant outlet aperture are formed by using electro-magnetic radiation; andwherein the cutting insert has a cutting edge, and the coolant outlet aperture is formed proximate the cutting edge and is directed towards the cutting edge.2. The toolholder assembly of claim 1 , wherein one of the coolant inlet aperture claim 1 , the at least one internal coolant passage claim 1 , and the coolant outlet aperture are circular in cross-sectional shape.3. The toolholder assembly of claim 1 , wherein one of the coolant inlet aperture claim 1 , the at least one internal coolant passage ...

CERAMIC CUTTING INSERT AND METHOD OF MAKING SAME

A cutting insert includes a body made of a ceramic material. The body has a first surface, a second surface and at least one flank surface extending between the first surface and the second surface. The first surface includes a chip forming feature extending in a radially outwardly direction to a cutting edge and extending in a radially inwardly direction to an inner edge. The chip forming feature includes a front wall that slopes downward from the cutting edge radially inward toward a rounded bottom surface and a back wall that slopes upward from the rounded bottom surface radially inward to the inner edge. The chip forming feature can include an optional land surface between the cutting edge and the front wall. 1. A cutting insert comprising a body made of a ceramic material , the body having a first surface , a second surface and at least one flank surface extending between the first surface and the second surface , the first surface including a chip forming feature extending in a radially outwardly direction to a cutting edge and extending in a radially inwardly direction to an inner edge , the chip forming feature including a front wall that slopes downward from the cutting edge radially inward toward a rounded bottom surface , and a back wall that slopes upward from the rounded bottom surface radially inward to the inner edge.2. The cutting insert according to claim 1 , wherein the front wall slopes downward at a rake angle of between about ten degrees and about twenty-five degrees with respect to a plane that is substantially perpendicular to a central claim 1 , longitudinal axis of the cutting insert.3. The cutting insert according to claim 1 , wherein the rounded bottom surface is formed with a radius claim 1 , R claim 1 , of between about 0.02 inches (0.508 mm) to about 0.08 inches (2.032 mm) and a depth of between about 0.006 inches (0.1524 mm) to about 0.025 inches (0.635 mm) with respect to the cutting edge of the cutting insert.4. The cutting insert ...

ADZER BIT WITH CUTTING SEGMENTS

An adzer bit includes a support member that defines a through hole that is configured to receive a fastener. The support member includes a cutting segment cap portion and a base portion. The support member also defines an annular slot that is axially disposed between the cutting segment cap portion and the base portion. A plurality of cutting segments are received and secured in the annular slot. The material of the plurality of cutting segments is harder than the material of the support member. 1. An adzer bit , comprising:a base member;a cutting segment cap coupled to the base member and formed of a first material; anda plurality of cutting segments axially disposed between the base member and the cutting segment cap and formed of a second material, the second material being harder than the first material.2. The adzer bit of wherein the plurality of cutting segments forms an annulus.3. The adzer bit of wherein a segment support boss is axially disposed between the base member and the cutting segment cap and the plurality of cutting segments being peripherally disposed around the segment support boss.4. The adzer bit of wherein one of the plurality of cutting segments is abutted to an adjacent cutting segment.5. The adzer bit of wherein the second material comprises tungsten carbide.6. The adzer bit of wherein the base member and the cutting segment cap define a through hole configured to receive a fastener to couple the adzer bit to an adzer head.7. The adzer bit of wherein the first material comprises steel.8. The adzer bit of wherein the plurality of cutting segments comprises four cutting segments.9. The adzer bit of wherein each one of the plurality of cutting segments is defined by an outer arcuate surface claim 1 , an inner arcuate surface claim 1 , and a plurality of opposed end surfaces claim 1 , an end surface of one cutting segment abutting an end surface of an adjacent cutting segment.10. The adzer bit of wherein the plurality of cutting segments ...

CUTTING TOOL PRODUCTION METHOD AND CUTTING TOOL

A method for manufacturing a cutting tool includes a rake face forming of forming a rake face in a substrate serving as a base of the cutting tool, a flank face forming of forming a flank face in the substrate serving as the base of the cutting tool, a rounded face forming of forming a rounded face between the rake face and the flank face, and an R-value calculating of calculating an R-value which is a value of a radius of the rounded face to be formed in the rounded face forming. 115-. (canceled)16. A method for manufacturing a cutting tool , comprising:a rake face forming of forming a rake face in a substrate serving as a base of the cutting tool;a flank face forming of forming a flank face in the substrate serving as the base of the cutting tool;a rounded face forming of forming a rounded face between the rake face and the flank face; andan R-value calculating of calculating an R-value which is a value of a radius of the rounded face to be formed in the rounded face forming.17. The method for manufacturing a cutting tool according to claim 16 ,wherein in the R-value calculating, the R-value is calculated by performing a preliminary cutting test, andwherein in the preliminary cutting test, a cutting tool in which the rounded face has not been formed yet is used.18. The method for manufacturing a cutting tool according to claim 16 ,wherein, in the rounded face forming, the rounded face is formed by using an injection lapping apparatus.19. The method for manufacturing a cutting tool according to claim 16 , further comprising claim 16 , after the rounded face forming claim 16 , a film forming treatment of applying a surface treatment to the cutting tool.20. The method for manufacturing a cutting tool according to claim 17 , further comprising claim 17 , after the rounded face forming claim 17 , a film forming treatment of applying a surface treatment to the cutting tool.21. The method for manufacturing a cutting tool according to claim 18 , further comprising claim ...

Drill Bit and Production Method

A drill bit has, along a drill bit axis, a drilling head, a multi-start helix made of two or more helical coils, and an insertion end. The helix has a helix slope and a pitch in a delivery region. In an outlet region of the helix, the outlet region being directed towards the insertion end, the helical coils merge continuously, within a first portion, from an orientation in alignment with the helix slope into an orientation parallel to the drill bit axis. A length of the first portion is at least one quarter of the pitch of the delivery region. The helical coils, in a second portion, are oriented parallel to the drill bit axis. 112.-. (canceled)13. A drill bit , comprising:a drilling head, a helix made of two or more helical coils, and an insertion end disposed along a drill bit axis, wherein the helix, in a delivery region, has a slope and a pitch;wherein in an outlet region of the helix, the outlet region is directed toward the insertion end and the two or more helical coils merge continuously, within a first portion of the outlet region, from an orientation in alignment with the slope into an orientation parallel to the drill bit axis;wherein a length of the first portion is at least one quarter of the pitch;wherein the two or more helical coils are, in a second portion of the outlet region, oriented parallel to the drill-bit axis.14. The drill bit according to claim 13 , wherein the delivery region and the first portion have a cross-section that is constant.15. The drill bit according to claim 13 , wherein helical grooves claim 13 , defined by respectively adjacent helical coils of the two or more helical coils claim 13 , in the delivery region and the first portion have a constant depth.16. The drill bit according to claim 13 , wherein in the first portion claim 13 , the slope decreases with respect to the drill bit axis at a rate of between 0.25 degrees and 2 degrees for each degree in a direction of rotation of the helix.17. The drill bit according to claim 16 ...

METHODS OF FORMING AND REPAIRING DOWNHOLE TOOLS HAVING FEATURES FOR REDUCING BALLING

Downhole tools are provided with a topographical pattern, and anti-balling material is provided over the topographical pattern. The topographical pattern may be defined by at least one of a plurality of recesses extending into a surface of a body of the tool and a plurality of protrusions protruding from the surface. Downhole tools include an insert disposed within a recess in a body, and the insert comprises an anti-balling material having a composition selected to reduce accumulation of formation cuttings on the tools when the tools are used to form or service a wellbore. Downhole tools include anti-balling material disposed over a porous mass provided over the surfaces of the tools. Methods of forming downhole tools include providing anti-balling material over features on and/or in a surface of a body of a tool. Methods of repairing downhole tools include removing an insert therefrom and disposing a replacement insert therein. 1. A method of forming a downhole tool , comprising:forming a topographical pattern on a bottom surface of a fluid course located between a rotationally leading surface of a first blade and a rotationally trailing surface of a second, adjacent blade, the topographical pattern comprising at least one of a plurality of recesses extending into the bottom surface and a plurality of protrusions protruding from the bottom surface, the topographical pattern disposed between the first blade carrying a first plurality of cutting elements and the second blade carrying a second plurality of cutting elements; andproviding an anti-balling material on at least a portion of the topographical pattern, the topographical pattern configured to improve retention of the anti-balling material on the bit body during drilling, wherein the anti-balling material has a composition selected to reduce accumulation of formation cuttings thereon when the downhole tool is used to remove formation material from a subterranean formation.2. The method of claim 1 , wherein ...

METHOD OF JOINING SINTERED PARTS OF DIFFERENT SIZES AND SHAPES

A method of joining a plurality of parts to form a unitary body. At least two sintered parts are provided. At least one of the sintered parts has at least one internal channel. Each of the parts is formed of a hard metal composition of material. The at least two sintered parts are assembled into the shape of a unitary body. Each of the at least two sintered parts has a joining surface and when each joining surface is brought into contact the surfaces form a bonding interface therebetween. The assembled parts are subjected to a vacuum or gas atmosphere, without the application of external pressure, and to a temperature sufficient to fuse the at least two sintered parts together at the bonding interface to form the unitary body. 1. A method of joining a plurality of parts to form a unitary body comprising the steps of:providing at least two sintered parts, each of the parts being formed of a cemented carbide or cermet, at least one of the sintered parts having at least one internal channel;assembling the at least two sintered parts into a shape of a unitary body, wherein each of the at least two parts has a joining surface and when each joining surface is brought into contact the joined surfaces form a bonding interface therebetween; andsubjecting the assembled at least two parts to a vacuum or gas atmosphere, without the application of external pressure, and to a temperature sufficient to fuse the at least two sintered parts together at the bonding interface to form the unitary body.2. The method of claim 1 , wherein the hard metal composition of material is cemented carbide.3. The method of claim 2 , wherein the cemented carbide has a hard phase of tungsten carbide and of one or more carbides claim 2 , nitrides or carbonitrides selected from the group of titanium claim 2 , chromium claim 2 , vanadium claim 2 , tantalum claim 2 , niobium bonded by a metal phase selected from the group of cobalt claim 2 , nickel claim 2 , iron and combinations thereof.4. The method of ...

METHOD OF JOINING SINTERED PARTS OF DIFFERENT SIZES AND SHAPES

A method of joining a plurality of parts to form a unitary body includes providing at least two sintered parts. Each of the parts is formed of a hard metal composition of material. The sintered parts are assembled into the shape of a unitary body. Each of the sintered parts has a joining surface and when each joining surface is brought into contact the surfaces form a bonding interface therebetween. The assembled sintered parts are subjected to a temperature sufficient to fuse the sintered parts together at the bonding interface to form the unitary body. A wear resistant tool includes a plurality of sintered parts, each of the sintered parts is formed of a hard metal composition of material, wherein the plurality of sintered parts can be assembled into a unitary body, wherein the assembled parts are fused together at a respective bonding interface to form the unitary body. 1. A method of joining a plurality of parts to form a unitary body comprising the steps of:providing at least two sintered parts, each of the parts being formed of a hard metal composition of material;assembling the at least two sintered parts into a shape of a unitary body, wherein each of the at least two parts has a joining surface and when each joining surface is brought into contact the joined surfaces form a bonding interface therebetween; andsubjecting the assembled parts to a vacuum or gas atmosphere, without the application of external pressure, and to a temperature sufficient to fuse the at least two sintered parts together at the bonding interface to form the unitary body.2. The method of claim 1 , wherein the hard metal composition of material is cemented carbide.3. The method of claim 2 , wherein the cemented carbide has a hard phase of tungsten carbide and of one or more carbides claim 2 , nitrides or carbonitrides selected from the group of titanium claim 2 , chromium claim 2 , vanadium claim 2 , tantalum claim 2 , niobium bonded by a metal phase selected from the group of cobalt ...

Veined tool blank and drill

A tool blank is substantially cylindrical and includes a front end, a rear end and a central longitudinal axis extending therebetween. At least one vein of a superhard material is formed in the blank at the front end. The vein has a depth in the axial direction and a bottom surface, a first side surface and a second side surface. Each vein has an extension in an inward direction from the periphery of the blank. For each vein, the first side surface forms an inclination angle with respect to the longitudinal axis that varies with the radial distance to the longitudinal axis of the blank over at least a major part of the extension. The inclination angle corresponds to a desired axial rake angle of a drill to be manufactured from the tool blank. A drill manufactured from such tool blank and a method for manufacturing a drill is provided.

Clad Hardfacing Application on Downhole Cutting Tools

A downhole milling tool for cutting non-geological materials in a well includes a body having an elongated and substantially cylindrical wall defining an inner passage extending through a portion of the body. The body includes a coupling end capable of being coupled to a working string to rotate the body. A plurality of blades extends radially outward from the body, and each blade extends along a length of the body. Each blade is oriented substantially parallel to a longitudinal axis of the body or is arranged in a spiral or helical configuration on the body. A laser-deposited cladding material is coupled to the plurality of blades. 1. A downhole milling tool comprising:a mill body;a plurality of mill blades radially extending from the mill body; anda cladding material coupled to at least one of the mill blades.2. The downhole milling tool of claim 1 , wherein the cladding material has a hardness of approximately 60 HRC.3. The downhole milling tool of claim 1 , wherein the coupling between the cladding material and the at least one of the mill blades includes a metallurgical bond.4. The downhole milling tool of further comprising:a plurality of cutting inserts coupled to the cladding material.5. The downhole milling tool of claim 4 , wherein the coupling between the plurality of cutting inserts and the cladding material includes a metallurgical bond.6. The downhole milling tool of claim 1 , wherein a hardness of the cutting inserts is greater than a hardness of the cladding material.7. The downhole milling tool of claim 1 , wherein the cutting inserts have a hardness of approximately 60 HRC.8. The downhole milling tool of further comprising:a plurality of cutting inserts coupled to the cladding material;wherein each cutting insert is substantially cylindrical in shape and includes a scalloped cutting surface.9. The downhole milling tool of further comprising:a plurality of cutting inserts coupled to the cladding material;wherein each cutting insert is substantially ...

Roller cone drill bit journal with asymmetric ball race and extended friction race

The present disclosure relates to roller cone drill bit journals with asymmetric ball races and extended friction races. The disclosure also relates to methods of forming such journals, and methods of finishing these journals to produce finished journals with symmetric ball races.

ENDODONTIC INSTRUMENT WITH ROUGH SURFACES AND METHOD FOR PRODUCING SUCH AN INSTRUMENT

An endodontic instrument includes a handle to be secured to an instrument holder and an active part to be introduced into a root canal. The active part includes a plurality of faces and at least one edge formed by the intersection of two adjacent faces. At least two of the adjacent faces have a surface with a roughness characterized by an arithmetic mean deviation with respect to the mean line Ra, chosen so that 0.5 μm Подробнее

ROTARY CUTTING TOOL

A rotary cutting tool or end mill is provided, the tool comprising a plurality of pairs of diametrically-opposed, symmetrical, helical flutes formed in a cutting portion of the tool body, wherein the pitch between at least one pair of adjacent helical flutes is less than or greater than the pitch of at least one other pair of adjacent helical flutes in at least one radial plane along the axial length of the flutes, a plurality of peripheral cutting edges, wherein at least one of the peripheral cutting edges has a radial rake angle different from radial rake angle of a peripheral cutting edge of a different helical flute. 1. A rotary cutting tool comprising: [ is opposed across the common axis by the paired helical cutting edge,', 'has a helix angle which varies by a first function of axial position,', 'has a radial rake angle that is a function of axial position; and, 'a first pair of helical cutting edges in which each helical cutting edge,'}, is opposed across the common axis by the paired helical cutting edge,', 'has a helix angle which varies by a second function of axial position different from said first function,', 'has a radial rake angle that is a function of axial position., 'a second pair of helical cutting edges in which each helical cutting edge,'}], 'a plurality of helical cutting edges having a common axis and common chirality,'}2. The rotary cutting tool of claim 1 , wherein said tool has a cutting portion terminating in a cutting end.3. The rotary cutting tool of claim 2 , wherein said helix angle which varies by a first function of axial position increases with proximity to said cutting end.4. The rotary cutting tool of claim 2 , wherein said helix angle which varies by a first function of axial position decreases with proximity to said cutting end.5. The rotary cutting tool of claim 1 , wherein at least one helical cutting edge has a radial rake angle at a first axial position different from the radial rake angle of another helical cutting edge at ...

Fusible Metal Clay, Structures Formed Therefrom, and Associated Methods

Structures for a tool surface of a downhole tool are constructed from a metal clay molded in a wet state. The wet state clay is a workable combination that can have a braze alloy grain, a tungsten carbide grain, and a binder. Additional cutting inserts can be embedded in the molded clay. Heat treatment applied to the molded metal clay causing the binder to be combusted and consumed. The braze alloy melts and then cools into a fused state with the tungsten carbide grain therein. The structure can affix to the tool surface of the tool by first being fused and then attached by brazing to the tool. Alternatively, the structure can be positioned in a fusible state adjacent the tool surface. When the heat treatment is applied, the structure fuses together and forms a metallurgical bond with the tool surface of the tool. 1. A method of overlaying a downhole tool for engagement downhole , the method comprising:molding a clay in a wet state into a structure, the clay in the wet state being a workable combination comprising a first grain, a second grain, and a binder, the first grain comprising a metal alloy having a first hardness and a first melting point, the second grain comprising a second material, the second material having a second hardness greater than the first hardness of the metal alloy and having a second melting point higher than of the first melting point of the metal alloy, the binder binding the first and second grains into the workable combination and having a combustion temperature at least not greater than the first melting point; and positioning the structure in a fusible state adjacent the downhole tool;', 'applying a heat treatment to the structure at least up to the first melting point;', 'fusing the structure together with the applied heat treatment; and', 'forming a metallurgical bond between the structure with the downhole tool with the applied heat treatment., 'affixing the structure to the downhole tool by2. The method of claim 1 , wherein the ...

CUTTING TOOL AND METHOD OF MANUFACTURING THE SAME

A cutting tool according to an embodiment of the invention includes: a column-like shaped body having a cutting edge located at a front end part thereof and a flute which is located at an outer peripheral part thereof and is continuous with the cutting edge; a front taper connected to a rear end part of the body and having a larger diameter as separating from the body; a column-like shaped step connected to a rear end part of the front taper and having a larger diameter than the body; a rear taper connected to a rear end part of the step and having a larger diameter as separating from the step; a column-like shaped shank connected to a rear end part of the rear taper and having a larger diameter than the step; and a front connection member located in a region including the front taper and the step. 1. A cutting tool , comprising:a column-like shaped body comprising a cutting edge located at a front end part thereof and a flute which is located at an outer peripheral part thereof and is continuous with the cutting edge;a front taper connected to a rear end part of the body and having a larger diameter as separating from the body;a column-like shaped step connected to a rear end part of the front taper and having a larger diameter than the body;a rear taper connected to a rear end part of the step and having a larger diameter as separating from the step;a column-like shaped shank connected to a rear end part of the rear taper and having a larger diameter than the step; anda front connection member located in a region including the front taper and the step.2. The cutting tool according to claim 1 , wherein the front connection member is located between the front taper and the step.3. The cutting tool according to claim 1 , wherein the front connection member is located on a portion of the step located closer to the front taper.4. The cutting tool according to claim 1 , wherein a melting point of a material of the front connection member is lower than both of a melting ...

TOOL WITH RIGHT-HAND AND LEFT-HAND CUTTING FEATURES EXTENDING ALONG THE FULL LENGTH OF THE CUTTING ZONE

Rotatable, solid cutting tool with both right-hand spirals and left-hand spirals, each of which includes an interrupted cutting edge having individual cutting edges. Individual cutting edges of the right hand spirals are axially staggered helically around a circumference of a cutting portion with respect to individual cutting edges of the left hand spirals so that, at each axial position along an axial length of the cutting portion, each radial cross-section includes both at least one individual cutting edge on a right hand spiral and at least one individual cutting edge on a left hand spiral. Individual cutting edges have a length along an outer circumference of the cutting tool that is the same for individual cutting edges of the right hand spiral and individual cutting edges of the left hand spirals. Cutting edges on differently handed spirals are both right handed cutting edges or both left handed cutting edges. 1. A rotatable , solid cutting tool , comprising:a solid body including a cutting portion and a shank portion,wherein the cutting portion and shank portion are sequentially arranged along a longitudinally-extending axis of rotation of the solid body with the cutting portion toward a front end of the cutting tool and the shank portion toward a rear end of the cutting tool,wherein the cutting portion includes a first type of cutting feature and a second type of cutting feature,wherein the first type cutting features include a plurality of right hand spirals and the second type of cutting feature includes a plurality of left hand spirals,wherein each of the plurality of right hand spirals includes an interrupted cutting edge having a plurality of individual cutting edges and each of the plurality of left hand spirals includes an interrupted cutting edge having a plurality of individual cutting edges,wherein a longitudinal length of the cutting portion is defined by a length, in a direction parallel to the longitudinally-extending axis of rotation of the ...

Drilling Tool

Methods of forming a drill bit or boring tool having a cutting edge that includes a pair of generally smooth curvilinear shaped portions that are positioned near the radial outer portions of the cutting edge and connected to one another by a pair of generally linear portions that traverse a longitudinal centerline of the tool. 1. A method of forming a boring tool comprising:providing an elongate body that extends along a longitudinal axis, the elongate body having a first end configured to cooperate with a drive tool and a cutting point formed at a second end of the elongate body opposite the first end;forming a first linear portion and a second linear portion along a distal edge of the cutting point, the first linear portion and the second linear portion being on opposite sides of the longitudinal axis; andforming a first curvilinear contour and a second curvilinear contour in the distal edge of the cutting point, each curvilinear contour being offset in a radial direction from the longitudinal axis of the elongate body and located radially outboard of a respective first linear portion and the second linear portion, such that an only non-tangential discontinuity of the cutting point is defined by a transition between the first linear portion and the second linear portion at an intersection of the longitudinal axis.2. The method of further comprising twisting the elongate body to form a helix that extends along the elongate body and is defined by at least two lands.3. The method of further comprising forming at least one groove in a radially outward facing surface between each of the at least two lands.4. The method of further comprising treating the cutting point for wear resistance after forming the at least one curvilinear contour.5. The method of wherein the treating is further defined as at least one of a honing operation claim 4 , a shot peening process claim 4 , a heat treating process claim 4 , a quenching process claim 4 , a coating process.6. The method of ...

METHOD FOR PRODUCING A DRILL BIT

A method for producing a drill bit includes preparing a metal shank and a metal drill, with the metal shank having a hardness greater than a hardness of the metal drill. Each of the metal shank and a metal drill includes an end having an end face. The metal shank and the metal drill are connected end to end, with the end face of the metal shank coaxially abutting the end face of the metal drill. The ends of the metal shank and the metal drill connected end to end are welded to form a molten pool at the welding area. A surface treatment is conducted on the welding area after welding. The welding area is annealed after the surface treatment. 1. A method for producing a drill bit , comprising:{'b': '1', '(a) preparing a metal shank and a metal drill, with the metal shank having a hardness greater than a hardness of the metal drill, with each of the metal shank and a metal drill including an end having an end face, with the metal shank and the metal drill connected end to end, and with the end face of the metal shank coaxially abutting the end face of the metal drill;'}{'b': '2', '(a) welding the ends of the metal shank and the metal drill connected end to end, forming a molten pool at the welding area;'}{'b': '3', '(a) conducting a surface treatment on the welding area after welding; and'}{'b': '4', '(a) annealing the welding area after the surface treatment.'}22. The method for producing a drill bit as claimed in claim 1 , with the welding in step (a) including coaxial welding around a peripheral contact area between the end faces of the metal bit and the metal shank claim 1 , with the coaxial welding including flash welding and laser welding claim 1 , and with the axial welding operated at a power in range of 5-30 kw to form the molten pool having a depth of 0.1-10 mm claim 1 , achieving binding of the metal shank and the metal bit.32. The method for producing a drill bit as claimed in claim 1 , with the welding in step (a) including friction welding and resistance ...

ROTARY CUTTING TOOL BLANKS AND APPLICATIONS THEREOF

In one aspect, blanks for rotary tooling applications are described herein. Such blanks can employ architectures realizing material efficiencies and temporal efficiencies when processed into rotary cutting tools. For example, a rotary cutting tool blank described herein comprises a plurality of interior channels extending along a longitudinal axis of the blank, the interior channels having radial positioning for external exposure along an axial length of cut of the rotary cutting tool upon introduction flutes to the blank. 1. A blank for a rotary cutting tool comprising:a plurality of interior channels extending along a longitudinal axis of the blank, the interior channels having radial positioning for external exposure along an axial length of cut of the rotary cutting tool upon introduction of flutes to the blank.2. The blank of claim 1 , wherein at least one of the interior channels has a width of 0.2 (d) to 0.45 (d) claim 1 , wherein d is diameter of the blank.3. The blank of claim 1 , wherein at least one of the interior channels has a width of 0.3 (d) to 0.43 (d) claim 1 , wherein d is diameter of the blank.4. The blank of claim 1 , wherein the interior channels extend along the longitudinal axis in a helical manner.5. The blank of claim 1 , wherein the interior channels extend linearly along the longitudinal axis.6. The blank of claim 1 , wherein the at least one of the interior channels is spaced from a circumferential surface of the blank a distance of 0.05 (d) to 0.2 (d) claim 1 , wherein d is diameter of the blank.7. The blank of claim 6 , wherein the interior channels are spaced from one another a distance of 0.1 (d) to 0.4 (d) claim 6 , wherein d is diameter of the blank.8. The blank of claim 1 , further comprising one or more interior fluid transport channels extending along the longitudinal axis of the blank.9. The blank of claim 1 , wherein the blank is formed of at least one of sintered cemented carbide claim 1 , ceramic and alloy.10. The blank of ...

ROTARY CUTTING TOOL

A rotary cutting tool or end mill is provided, the tool comprising a plurality of pairs of diametrically-opposed, symmetrical, helical flutes formed in a cutting portion of the tool body, wherein the pitch between at least one pair of adjacent helical flutes is less than or greater than the pitch of at least one other pair of adjacent helical flutes in at least one radial plane along the axial length of the flutes, a plurality of peripheral cutting edges, wherein at least one of the peripheral cutting edges has a radial rake angle different from radial rake angle of a peripheral cutting edge of a different helical flute. 1. A rotary cutting tool comprising: [ has a helix angle which varies by a first function of axial position,', 'has a radial rake angle that is a function of axial position; and, 'a first pair of helical cutting edges in which each helical cutting edge, is opposed across the common axis by the paired helical cutting edge,'}, has a helix angle which varies by a second function of axial position different from said first function,', 'has a radial rake angle that is a function of axial position., 'a second pair of helical cutting edges in which each helical cutting edge, is opposed across the common axis by the paired helical cutting edge,'}], 'a plurality of helical cutting edges having a common axis and common chirality,'}2. The rotary cutting tool of claim 1 , wherein said tool has a cutting portion terminating in a cutting end.3. The rotary cutting tool of claim 2 , wherein said helix angle which varies by a first function of axial position increases with proximity to said cutting end.4. The rotary cutting tool of claim 2 , wherein said helix angle which varies by a first function of axial position decreases with proximity to said cutting end.5. The rotary cutting tool of claim 1 , wherein at least one helical cutting edge has a radial rake angle at a first axial position different from the radial rake angle of another helical cutting edge at the ...

BI-METAL DRILL BIT

A bi-metal drill bit includes a body defining a cutting end and a shank end. At least a portion of the cutting end is formed of a first metal section and at least a portion of the shank end is formed of a second metal section that is welded to the first metal section. The first metal section has a first metal having a material hardness that is higher than a second material hardness of the second metal section. One of the first and second metal sections is treated either by coating or oxide treating so as to have a recognizable different appearance than the other of the first and second metal sections. A length to diameter ratio of the first metal section has been optimized to allow electrical resistance welding, provide better strength in the rear end after the tip breaks through a workpiece, and to minimize cost. 1. A drill bit , comprising:a first rod-like section having a front cutting tip portion and a rear fluted portion, and composed of a first metal; anda second rod-like section having a front fluted portion and a rear shank portion, and composed of a different second metal,wherein the front fluted portion of the second section is welded to the rear fluted portion of the first section, the first section has a first material hardness that is higher than a second material hardness of the second section, and the first section has a length to diameter ratio between approximately 0.7 and approximately 3.0.2. The drill bit according to claim 1 , wherein said first metal section of said body has a nominal diameter of 3/16″ and a length to diameter ratio of at or between 1.3 and 3.0.3. The drill bit according to claim 1 , wherein said first metal section of said body has a nominal diameter of ¼″ and a length to diameter ratio of at or between 1.0 and 2.3.4. The drill bit according to claim 1 , wherein said first metal section of said body has a nominal diameter of ⅜″ and a length to diameter ratio of at or between 0.8 and 1.8.5. The drill bit according to claim 1 , ...

DRILL AND PRODUCTION METHOD FOR A DRILL

A drill bit has a shank () between a drilling head () and an insertable end () along an axis (). The shank () is provided with at least two first flutes () that run along the axis () and at least a second helical flute (). The first flutes () and the second flute () cross each other at several crossings ().The width () of the first flute steadily decreases over the area between two adjacent crossings () from one of the crossings () all the way to the narrowest place () and subsequently steadily increases all the way to the other crossing (). 16-. (canceled)7. A drill bit comprising:a shank between a drilling head and an insertable end along an axis, the shank having at least two first flutes running along the axis and at least a second helical flute, the first flutes and the second flute crossing each other at several crossings, a width of the first flutes steadily decreasing over an area between two adjacent crossings from one of the crossings all the way to a narrowest place and subsequently steadily increasing all the way to the other crossing.8. The drill bit as recited in wherein a plurality of helical ribs are delimited by the first flutes in the circumferential direction and by the second flutes along the axis claim 7 , and the helical ribs have a convex surface in the circumferential direction.9. The drill bit as recited in wherein the second flutes are wider than the first flutes.10. The drill bit as recited in wherein a radial distance between the first flutes and the axis is equal to or less than 30% smaller than the radial distance between the second flute and the axis.11. A production method for a drill bit comprising the following steps:forming a rod-like blank having a cylindrical core and at least two webs protruding radially from the cylindrical core and running along an axis of the blank, and having first flutes running in the circumferential direction between the webs and exposing the cylindrical core; androlling longitudinally a second helical ...

Bore Cutting Tool and Method of Making the Same

A bore cutting tool for cutting metal workpieces includes a tool substrate and a tool coating on a surface of the tool substrate. The bore cutting tool includes a plurality of pits in the surface of the tool substrate and wherein the tool coating extends over the pits such that the pit surface includes the tool coating. In this way, the pit dimensions can be retained over prolonged tool life and the pits, with their coated surface, are particularly effective at retaining lubricant so that the thickness of a lubricant film can be increased as compared to a tool without the coated pits. In the embodiments, the pits are formed by laser etching and are present only on the cylindrical land. Average pit depth is suitably in the range 8 μm to 25 μm, average pit width and pit length is independently selected from 40 μm to 250 μm and average pit density may be 20 to 30 pits/mm 2 .

Method for laser-based generation of a structure on a rake face of a cutting tool

A method for the laser-based generation of a structure on a rake face of a cutting tool is disclosed, where at least one structure is formed by lines that are generated with a mutual spacing of at most 400 μm with a laser beam at least in areas within a predetermined contour on at least one rake face of the cutting tool. A course of the lines forming the structure is oriented with respect to a profile of at least one cutting edge of the at least one rake face.

Drill body of indexable drill

A drill main body of an indexable drill is disposed first and second spiral flutes on a column-shaped outer circumferential surface with an inner blade tip cutting a hole center side mounted on a tip portion of the first spiral flute and an outer blade tip cutting a hole outer circumferential side mounted on a tip portion of the second spiral flute and the drill main body discharges chips through the first spiral flute and the second spiral flute toward a shank while hole machining is performed with the inner blade tip and the outer blade tip. The drill is a deep hole machining drill having a length of the first spiral flute and the second spiral flute equal to or greater than 4D relative to a drill diameter D that is an outer diameter of the outer blade tip.

COMPOSITE BLANKS AND TOOLING FOR CUTTING APPLICATIONS

In one aspect, composite blanks and tooling are described herein employing composite structures for efficient use of high grade materials, such as high grade sintered cemented carbides and/or ceramics. 1. A composite blank comprising:a hollow shank portion extending along a central longitudinal axis of the blank; anda cutting portion extending from the hollow shank portion, the cutting portion comprising flutes along an axial length of cut and one or more interior coolant channels extending along the central longitudinal axis and terminating at a cutting end surface of the blank, wherein the cutting portion is formed of a first material along the axial length of cut differing in at least one property from a second material forming the hollow shank portion.2. The composite blank of claim 1 , wherein the hollow shank portion and cutting portion are continuous with one another.3. The composite blank of further comprising a braze joint between the hollow shank portion and cutting portion.4. The composite blank of claim 1 , wherein the one or more interior coolant channels extend helically along the longitudinal axis.5. The composite blank of claim 1 , wherein the one or more interior coolant channels extend linearly along the longitudinal axis.6. The composite blank of claim 1 , wherein the first material is a first cemented carbide and the second material is a second cemented carbide.7. The composite blank of claim 6 , wherein the first cemented carbide differs from the second cemented carbide in composition.8. The composite blank of claim 7 , wherein the first cemented carbide comprises cubic carbides in an amount less than 0.3 wt. % claim 7 , and the second cemented carbide comprises cubic carbides in an amount greater than 0.3 wt. %.9. The composite blank of claim 6 , wherein the first cemented carbide and the second cemented carbide differ in average particle size.10. The composite blank of claim 9 , wherein the first cemented carbide has an average particle size ...

SURFACE-COATED CUTTING TOOL AND METHOD OF MANUFACTURING THE SAME

A surface-coated cutting tool includes a base material and a coating formed on the base material. The coating includes an α-AlOlayer containing a plurality of α-AlOcrystal grains. The α-AlOlayer includes: a first region made up of an edge ridgeline, a region A of a rake face, and a region B of a flank face; a second region which is a region of the rake face except for the region A and covered with the coating; and a third region which is a region of the flank face except for the region B. The α-AlOlayer satisfies a relation b−a>0.5, where a is an average value of a TC(006) in the first region in texture coefficient TC(hkl) and b is an average value of the TC(006) in the second region or the third region in texture coefficient TC(hkl). 1. A surface-coated cutting tool having a rake face , a flank face , and an edge ridgeline constituting a boundary between the rake face and the flank face ,the surface-coated cutting tool comprising a base material and a coating formed on the base material,{'sub': 2', '3', '2', '3, 'the coating including an α-AlOlayer containing a plurality of α-AlOcrystal grains,'}{'sub': 2', '3, 'claim-text': a first region made up of the edge ridgeline, a region A of the rake face, and a region B of the flank face;', 'a second region which is a region of the rake face except for the region A and covered with the coating; and', 'a third region which is a region of the flank face except for the region B,, 'the α-AlOlayer includingthe region A being sandwiched between the edge ridgeline and a virtual line in the rake face, the virtual line passing through a point located 1 mm away from the edge ridgeline and extending along the edge ridgeline,the region B being sandwiched between the edge ridgeline and a virtual line in the flank face, the virtual line passing through a point located 1 mm away from the edge ridgeline and extending along the edge ridgeline, and{'sub': 2', '3, 'the α-AlOlayer satisfying a relation b−a>0.5, where a is an average value of ...

METHOD FOR PRODUCING A SEGMENT FOR A DIAMOND TOOL AND SEGMENT FOR A DIAMOND TOOL

A method for producing a segment () for a diamond tool with regard to providing a simple, cost-effective and environmentally friendly production of diamond tools is configured and modified by the following steps: providing at least two solid elements (), putting artificial diamonds () onto a surface of each of the at least two solid elements (), assembling the solid elements () into a mould with the solid elements () being stacked on each other and using a hot pressing machine to hot press the solid elements () in order to form one diamond segment (). A segment () for a diamond tool is also specified and provided. 111. Method for producing a segment () for a diamond tool comprising:{'b': '10', 'providing at least two solid elements (),'}{'b': 26', '10, 'putting artificial diamonds () onto a surface of each of the at least two solid elements (),'}{'b': 10', '30', '10, 'assembling the at least two solid elements () into a mould () with the at least two solid elements () being stacked on each other, and'}{'b': 28', '10', '11, 'using a hot pressing machine () to hot press the at least two solid elements () in order to form one diamond segment ().'}21010. Method according to claim 1 , characterized in that the at least two solid elements () are cut from at least one block of solid material into an individual solid element ().310. Method according to claim 1 , characterized in that the at least two solid elements () have a board-like or prismatic shape.410. Method according to claim 1 , characterized in that the at least two solid elements () and/or the at least one block blocks of solid material consist of copper claim 1 , aluminum claim 1 , nickel or steel.516261026. Method according to claim 1 , characterized in that holes or recesses () for holding the artificial diamonds () are being formed on the at least two solid elements () claim 1 , particularly before putting the artificial diamonds () thereon.61618201022241610. Method according to claim 5 , characterized in ...

MANUFACTURING OF HOLEMAKING TOOLS

A process for producing a tool having a main body which extends in a longitudinal direction and at least one blade for machining a workpiece includes providing a base coating on the tool; grinding the at least one blade in a manner that removes the base coating in the region of the at least one blade; and providing a second, fine coating, to the at least one ground blade. 1. A process for producing a tool having a main body which extends in a longitudinal direction and at least one blade for machining a workpiece , the process comprising:providing a base coating on the tool;grinding the at least one blade in a manner that removes the base coating in the region of the at least one blade;providing a second, fine coating, to the at least one ground blade.2. The process of wherein the at least one blade is formed during the grinding operation after application of the base coating.3. The process of wherein the fine coating has a smaller layer thickness than the base coating.4. The process of wherein the fine coating layer has a layer thickness smaller than the base coating by a factor in the range of 2-10.5. The process of wherein the fine coating layer has a layer thickness in the range of 1-2 μm.6. The process of wherein the fine coating is applied with the aid of a vapor depositing process.7. The process of wherein the tool is a rotational tool.8. The process of wherein the tool is a drilling/reaming tool claim 1 , which has on an end face a drilling tip with at least one main drilling blade claim 1 , formed in particular by grinding claim 1 , and which also has circumferentially at least one reaming blade claim 1 , and in which claim 1 , after the application of the base coating claim 1 , only the at least one reaming blade is ground.9. The process of further comprising: grinding a blank to a desired size, and', 'grinding main drilling blades and assigned main chip flutes in the blank., 'prior to providing a base coating on the tool10. The process of claim 9 , ...

ROTATING TOOL, IN PARTICULAR DRILL, AS WELL AS A METHOD FOR MANUFACTURING A ROTATING TOOL OF THIS TYPE

The rotating tool, in particular a drill, includes a fluted cutting shank made of a resistant material, in particular carbide, extending in an axial direction along a rotational axis. Connecting to the cutting shank in the axial direction is an intermediate shank made of a material of greater elasticity in comparison the resistant material, in particular of tool steel. The intermediate shank includes an insertable cutting insert that may be exchanged. The cutting shank is preferably a cutting shank recycled from a used solid carbide drill. 1. A rotating tool , comprising a cutting shank made of a resistant material extending in an axial direction along a rotational axis and provided with chip flutes , wherein connecting to the cutting shank in the axial direction is an intermediate shank made of a different material in comparison to the resistant material , to which an intermediate shank of a cutting insert is secured.2. The rotating tool as claimed in claim 1 , wherein the cutting insert is secured to the intermediate shank so as to be exchangeable.3. The rotating tool as claimed in claim 2 , wherein the intermediate shank comprises at its end face clamping webs between which the cutting insert is held clamped.4. The rotating tool as claimed in claim 1 , wherein the cutting shank is made from a previously used solid resistant material tool.5. The rotating tool as claimed in claim 1 , wherein the chip flutes run along the cutting shank and continue in the intermediate shank.6. The rotating tool as claimed in claim 1 , wherein the cutting shank is materially bonded to the intermediate shank.7. The rotating too as claimed in claim 1 , wherein the intermediate shank is welded to the cutting shank.8. The rotating tool as claimed in claim 1 , wherein the intermediate shank is formed via selective layer-by-layer laser application.9. The rotating tool as claimed in claim 1 , further comprising a connection surface between the cutting shank and the intermediate shank which ...

MACHINING TOOL AND METHOD FOR MANUFACTURING A MACHINING TOOL

A machining tool, in particular a drill carrier tool, includes a monolithic base body extending in the axial direction which, at least in one section, has a porous or grid-like core structure that is encased in a solid outer jacket. These measures allow less material to be used, while maintaining good mechanical properties. The porous or grid-like core structure is simultaneously used for transporting coolant. The base body is manufactured in particular by means of a 3D printing method. 1. A machining tool comprising a monolithic base body extending in an axial direction wherein the base body , in at least one section , has a non-solid core structure which is encased in a solid outer jacket.2. The machining tool as claimed in claim 1 , wherein the core structure is porous claim 1 , grid-like claim 1 , bionic or a combination thereof.3. The machining tool as claimed in claim 1 , wherein the core structure is a honeycomb-like structure.4. The machining tool as claimed in claim 1 , wherein claim 1 , if the core structure is porous claim 1 , the core structure has a porosity ranging between 5.2% and 90% and claim 1 , wherein claim 1 , if the core structureis grid-like claim 1 , the core structure has a plurality of canals extending in a longitudinal direction and having a canal width (W) less than 0.5 mm.5. The machining tool as claimed in claim 1 , wherein the core structure has a circular cross-section.62. The machining tool as claimed in claim 1 , wherein the core structure covers 5% to 80% of an entire cross-sectional area (A) of the base body.71. The machining tool as claimed in claim 1 , wherein the core structure has different cross-sectional areas (A) in the axial direction.8. The machining tool as claimed in claim 1 , wherein the base body has a shaft part claim 1 , as well as a front cutting part claim 1 , each with a core structure claim 1 , and wherein the core structure extends into the cutting part from the shaft part.9. The machining tool as claimed in ...

LAMINATED FOAM PRODUCT AND METHODS FOR MAKING LAMINATED FOAM PRODUCTS

Thermally laminated foam boards, methods for making thermally laminated foam boards, apparatus for making thermally laminated foam boards, smaller foam pieces made from thermally laminated foam boards, methods for making smaller foam pieces from thermally laminated foam boards, parts made from thermally laminated foam boards, methods for making parts from thermally laminated foam boards, and tools for making parts from thermally laminated foam boards are disclosed. The thermally laminated foam boards are made by thermally bonding at least two polystyrene boards together. 132-. (canceled)33. A rotary cutting tool for shaping insulation products , comprising:an annular support formed from sheetmetal;a plurality of cutting elements secured to the sheetmetal annular support;a base secured to the sheetmetal annular support for rotating the sheetmetal annular support and attached cutting elements.34. The rotary cutting tool of wherein the annular support is made by spin forming.35. The rotary cutting tool of wherein the plurality of cutting elements are carbide.36. The rotary cutting tool of wherein each of the plurality of cutting elements are spaced apart on a tape and the tape is attached to the annular support.37. The rotary cutting tool of wherein the tape is brazed onto the annular support.38. The rotary cutting tool of wherein the plurality of cutting elements are uniformly spaced apart.39. The rotary cutting tool of wherein the insulation product is a foam insulation material and the plurality of cutting elements are spaced apart a sufficient distance that prevents the build-up and retention of foam insulation material on the rotary tool when cutting the foam insulation material.40. The rotary cutting tool of wherein the foam insulation material is polystyrene foam insulation.41. The rotary cutting tool of wherein the annular support and the base form a hollow cutting tool.42. The rotary cutting tool of wherein the annular support is shaped as a hemisphere.43. A ...

ROTARY DRILL BIT AND METHOD FOR DESIGNING A ROTARY DRILL BIT FOR DIRECTIONAL AND HORIZONTAL DRILLING

A multi-layer downhole drilling tool designed for directional and horizontal drilling is disclosed. The drilling tool includes a bit body including a rotational axis extending therethrough. A plurality of primary blades are disposed on exterior portions of the bit body and a plurality of secondary blades are disposed on exterior portions of the bit body between the primary blades. The drilling tool further includes a plurality of first-layer cutting elements disposed on exterior portions of the primary blades and a plurality of second-layer cutting elements disposed on exterior portions of the secondary blades. The second-layer cutting elements are track set with the first-layer cutting elements in an opposite track set configuration. 116.-. (canceled)17. A method of designing a multi-profile layer drill bit to provide directional and horizontal drilling , the method comprising:placing a plurality of first-layer cutting elements on a plurality of primary blades disposed on exterior portions of a bit body;defining a cutting element configuration selected from the group consisting of a front track set configuration and an opposite track set configuration;estimating a weight on bit where a plurality of second-layer cutting elements engage a formation during drilling based on a formation characteristic of a wellbore and a rotation speed of a motor associated with the drill bit;determining an amount of under-exposure between the second-layer cutting elements and the first-layer cutting elements; andplacing the second-layer cutting elements on a plurality of secondary blades according to the defined cutting element configuration and the determined under-exposure in order to prevent the motor from stalling during sliding mode drilling.18. The method of claim 17 , wherein the formation characteristic includes a formation strength.19. The method of claim 17 , wherein placing the first-layer cutting elements on the primary blades comprises adjusting at least one of location ...

SHANKS

A shank comprises a captive portion, comprising a longitudinal central axis, a captive end, a first set of first structures, and a second set of second structure. The second set of the second structures is closer to the captive end than the first set of the first structures. The first set of the first structures has a first axial compliance coefficient along the longitudinal central axis. The second set of the second structures has a second axial compliance coefficient along the longitudinal central axis. The first axial compliance coefficient of the first set of the first structures is greater than the second axial compliance coefficient of the second set of the second structures. 1110. A shank () , comprising:{'b': 116', '112', '118', '117', '120', '119', '120, 'i': a', 'b, 'claim-text': [{'b': 120', '112', '112, 'i': 'a', 'the first structures () extend away from the longitudinal central axis () in a direction normal to the longitudinal central axis ();'}, {'b': 120', '112', '112, 'i': 'b', 'the second structures () extend away from the longitudinal central axis () in a direction normal to the longitudinal central axis ();'}, {'b': 120', '120', '112', '112', '112, 'i': a', 'b, 'ends of the first structures () and the second structures (), farthest away from the longitudinal central axis (), form cylindrical surfaces, parallel to the longitudinal central axis () and equidistant from the longitudinal central axis ();'}, {'b': 117', '120', '119', '120', '112', '116, 'i': a', 'b, 'the first set () of the first structures () and the second set () of the second structures () are each half as long along the longitudinal central axis () as the captive portion ();'}, {'b': 117', '120', '119', '120', '112, 'i': a', 'b, 'the first set () of the first structures () and the second set () of the second structures () do not overlap along the longitudinal central axis ();'}, {'b': 119', '120', '118', '117', '120, 'i': b', 'a, 'the second set () of the second structures () is ...

Machining tool and method for manufacturing a machining tool

A machining tool, in particular a drill carrier tool, includes a monolithic base body extending in the axial direction which, at least in one section, has a porous or grid-like core structure that is encased in a solid outer jacket. These measures allow less material to be used, while maintaining good mechanical properties. The porous or grid-like core structure is simultaneously used for transporting coolant. The base body is manufactured in particular by means of a 3D printing method.

METHOD FOR PRODUCING A MEDICAL INSTRUMENT BY WAY OF AN ADDITIVE METHOD

The invention relates to a method for producing a medical instrument, characterized in that said instrument is produced at least partly by means of an additive production method. 1. A method for producing a medical instrument , characterized in that said instrument is produced at least partly by means of an additive production method.2. The method as claimed in claim 1 , wherein a shaft with a clamping region and/or at least part of a head provided with cutting edges is produced by cutting material from a semi-finished product claim 1 , and in that at least part of a head of the instrument is then generated additively.3. The method as claimed in claim 1 , wherein the instrument is produced additively with its rotation axis in a vertical arrangement.4. The method as claimed in claim 1 , wherein the additive method used is a selective laser application method claim 1 , a selective laser sintering method or an electron beam welding method.5. The method as claimed in claim 1 , wherein at least the additively produced part of the instrument is made of steel claim 1 , ceramic claim 1 , hard metal claim 1 , titanium claim 1 , titanium alloys or plastic.6. The method as claimed in claim 1 , wherein at least part of the head is re-worked by means of a subtractive method.7. The method as claimed in claim 6 , wherein the subtractive method is a laser ablation method and/or a cutting method.8. The method as claimed in claim 6 , wherein the subtractive method is used to sharpen cutting edges or to improve the concentric running of the instrument.9. The method as claimed in claim 1 , wherein the instrument is designed as a dental drill claim 1 , milling cutter claim 1 , grinding instrument claim 1 , sonic tip and/or saw blade. Medical instruments, for example dental drills, milling cutters, grinding instruments, sonic tips or saw blades, are classically produced in the prior art by cutting methods. These methods usually start out from a semi-finished product which is machined by ...

CUTTER BUILD AND TRUING MACHINE

A cutter build and truing machine () comprising a mechanism () to position cutting blades () by moving the blades in either direction in a mounting slot () of a cutter head (). The machine further includes a torque spindle () and driver () to automatically tighten or loosen clamp bolts (). 1. A cutter build and truing machine comprising:a machine base;a cutter head spindle rotatable about a spindle axis B;a build carriage subsystem comprising a pair of blade positioning arms relatively movable toward and away from one another in a linear direction, said blade positioning arms being positionable for contacting a cutting blade at opposite lengthwise ends thereof, said blade positioning arms being further movable so as to position said cutting blade in a blade mounting slot of a cutter head releasably mountable on said cutter head spindle, sad blade mounting slot extending in a lengthwise direction and said blade positioning arms being capable of moving said cutting blade in either direction along said lengthwise slot direction.2. The cutter build and truing machine of further comprising a driver tip in communication with a torque spindle claim 1 , said driver tip being capable of engaging with and disengaging from a blade clamp bolt in said cutter head claim 1 , said driver tip being operable to tighten said blade clamp bolt for securing a cutting blade in said blade mounting slot of said cutter head and also being capable of loosening said clamp bolt whereby said cutting blade is movable in said lengthwise direction of said blade mounting slot.3. The cutter build and truing machine of wherein said driver tip and torque spindle are located in said build carriage subsystem.4. The cutter build and truing machine of wherein said build carriage subsystem is positionable along three mutually perpendicular linear axes (X claim 1 , Y claim 1 , Z).5. The cutter build and truing machine of wherein said blade positioning arms are angularly adjustable about a swivel axis C.6. ...

FLUTED CUTTING TOOL CONFIGURATION AND METHOD THEREFOR

One aspect of the invention provides a cutting tool used for peripheral cutting operations, comprising: a plurality of peripheral cutting edges, and a plurality of flutes disposed between the peripheral cutting edges, wherein each of the flutes includes at least one surface, and at least one depression recessed into the at least one flute surface, wherein each of the depressions defines a depression interior configured to trap cooling liquid during operation of the cutting tool, and wherein at least one of the depressions is dimensioned and disposed to enhance heat dissipation at least one of the peripheral cutting edges. 1. A cutting tool used for peripheral cutting operations , comprising:a plurality of peripheral cutting edges, and a plurality of flutes disposed between said peripheral cutting edges,wherein each of said flutes includes at least one surface, and at least one depression recessed into said at least one flute surface,wherein each of said depressions defines a depression interior configured to trap cooling liquid during operation of said cutting tool, andwherein at least one of said depressions is dimensioned and disposed to enhance heat dissipation at at least one of said peripheral cutting edges.2. The cutting tool according to claim 1 , wherein said fluted cutting tool comprises an end mill.3. The cutting tool according to claim 1 ,wherein said at least one flute surface includes a rake face extending from one of said peripheral cutting edges, in a generally radially inward direction with respect to a longitudinal axis of said cutting tool, andwherein each said rake face has an overall surface area which is interrupted via said at least one depression, thereby reducing a general chip-flute contact area when compared to a rake face without said at least one depression.4. The cutting tool according to claim 3 , wherein an interior of each of said rake face depressions:is completely surrounded by one or more unrecessed ribs to thereby define borders ...

Method for Manufacturing a Continuous Drill Ring for a Core Drill Bit

A method for manufacturing a continuous drill ring for a core drill bit is disclosed. The method includes forming at least two green compacts in layers in a direction of formation between a bottom side and a top side by successively applying powder layers containing a powder mixture and diamond layers containing diamond particles that are arranged in a set pattern. The green compacts are shaped into ring segments under the effect of pressure. The ring segments are joined in a circular manner and they are sintered under the effect of heat so as to obtain a continuous drill ring. 112.-. (canceled)13. A method of manufacturing a continuous drill ring for a core drill bit , comprising the steps of:producing at least two green parts by successive applications of powder layers of a powder mixture and diamond layers with diamond particles disposed in a set pattern;forming the at least two green parts into respective ring segments under pressure; andannularly assembling the ring segments and sintering the ring segments under temperature action to form the continuous drill ring.14. The method according to claim 13 , wherein the continuous drill ring includes n≧1 first green parts which are formed into first ring segments and n second green parts which are formed into second ring segments and wherein the first and the second ring segments are disposed alternately one behind the other along a circumferential direction of the continuous drill ring.15. The method according to claim 13 , wherein the continuous drill ring includes first ring segments and second ring segments claim 13 , wherein the first ring segments include a first powder mixture and first diamond particles claim 13 , and wherein the second ring segments include a second powder mixture and second diamond particles.16. The method according to claim 13 , wherein the continuous drill ring includes a number of 2n claim 13 , n≧1 equal green parts claim 13 , wherein n green parts are formed under pressure action with a ...

DENTAL DRILL AND METHOD FOR PRODUCING SAME

A method produces a dental drill that has a shank and a work section. The shank contains a centrally arranged, continuous first channel. The work section contains one or more continuous, spiral-shaped further channels. The first channel and the further channels open into a common chamber connecting the shank and the work section. The shank is sintered with the work section in order to form a one-piece, sintered component that encloses the chamber connecting the shank and the work section. 1. Method of producing a dental drill having a shank and a work section , wherein the shank has a centrally arranged , continuous first channel and the work section has one or more continuous , helically extending further channels , the first channel and the further channels opening into a common chamber connecting the shank and the work section , comprising the following steps:producing the shank having a centrally arranged, continuous first channel,producing the work section having one or more continuous, helically extending further channels andsintering the shank to the work section to form a one-piece, sintered component which encloses the chamber connecting the shank and the work section.2. Method according to claim 1 , wherein for producing the shank a plastic material is extruded by a first extrusion tool in order to provide a first body claim 1 , which comprises plastic material claim 1 , with a centrally arranged claim 1 , continuous first channel claim 1 , the body leaving the first extrusion tool is cut to a predetermined first length and the cut-to-length body is hardened by drying.3. Method according to claim 1 , wherein for producing the work section a plastic material is extruded by a second extrusion tool in order to provide a second body claim 1 , which comprises plastic material claim 1 , with rectilinearly extending further channels claim 1 , the second body leaving the second extrusion tool is cut to a predetermined second length claim 1 , the cut-to-length ...

METHOD FOR MANUFACTURING A TOOL HEAD

A method for manufacturing a tool head includes forming a first and a second part from a powder composition. The first and the second parts include corresponding joining surfaces, and the parts have outer surface portions configured to form portions of a peripheral envelope surface of the tool head. The method further includes forming corresponding grooves in the corresponding joining surfaces, assembling the parts into a shape of a tool head by bringing the joining surfaces into contact to form an interface, so that each pair of corresponding grooves forms a channel extending in the interface, the channel having an inlet opening in a rear end of the tool head and an outlet opening in a front end or in the peripheral envelope surface of the tool head, and joining the assembled parts in a sintering operation to form the tool head. 1. A method for manufacturing a tool head of a rotary cutting tool , the tool head having a front end and a rear end between which a centre axis of rotation and a peripheral envelope surface extend , the method comprising:forming at least a first part and a second part from a powder composition, wherein the first part comprises has a first joining surface and wherein the second part comprises has a second joining surface, the first joining surface being configured to be brought into contact with the second joining surface, wherein the first part further comprises includes a first outer surface portion configured to form a first portion of the peripheral envelope surface of the tool head, and wherein the second part further comprises includes a second outer surface portion configured to form a second portion of the peripheral envelope surface of the tool head;forming at least one groove in the first joining surface and at least one corresponding groove in the second joining surface, wherein the at least one groove of the first joining surface is configured to face the at least one corresponding groove of the second joining surface when the ...

Drill body of indexable drill and manufacturing method therefor

Because a paired first helical flute (24) and second helical flute (26) that are provided on the drill body (12) of an indexable drill (10) are mirror-finished by machining using ball end mills (30, 32) after being subjected to hardening heat treatment, friction of the inner flute surface is reduced and swarf is favorably evacuated. As a result, abrasion, blade chipping or breakage, etc., which arise from swarf clogging, are limited even in indexable drills (10) with long flute length (L) that are for drilling deep holes and durability (tool life) is improved. Moreover, stable drilling is made possible by a limitation of the increase in cutting resistance due to swarf clogging and the range of possible processing is expanded by a relaxation of the limiting processing conditions under which drilling is possible.

Auger Bit

An auger bit and a method of manufacturing the auger bit it is described. The auger bit has an axially-elongated shank portion, a tool-engaging portion on a first end of the shank, and a work-entering head portion on a second end of the shank. The machined bit is neutral heat treated and the cutting face is locally hardened by induction heat treating.

Drilling tool for machine tools and method of producing the same

PCT No. PCT/EP97/00901 Sec. 371 Date Aug. 27, 1998 Sec. 102(e) Date Aug. 27, 1998 PCT Filed Feb. 26, 1997 PCT Pub. No. WO97/31742 PCT Pub. Date Sep. 4, 1997The invention concerns a drilling tool for machine tools. The drilling tool comprises a drill body with two chip-conveying grooves which are delimited at their flanks by helically curved ribs. Disposed at the end of the drill body is a drill head which comprises two segment parts, which are separated from each other by opposite axially aligned chip spaces, and two cutting plates which are each disposed in a recess in the segment parts in the region of an axially parallel radial chip-guide surface at different radial spacings from the drill axis with mutually partially overlapping working regions. At a transition point, the chip-guide surfaces merge into the flanks of the adjacent chip-conveying grooves. Disposed at at least one of the transition points is a transition surface which is gradually recessed so that it widens the cross-section of the chip space and merges into a flank of the adjacent chip-conveying groove.

可转位式钻头的钻头主体及其制造方法

设置在可转位式钻头（10）的钻头主体（12）上的一对第一螺旋槽（24）及第二螺旋槽（26），在被实施硬化热处理之后，通过由球头立铣刀（30、32）进行的切削加工进行镜面精加工，因此，槽内表面的摩擦减小，切屑良好地被排出。由此，在槽长（L）长的深孔加工用的可转位式钻头（10）中，也能够抑制由切屑堵塞引起的磨损、崩刃、断裂等，耐久性（刀具寿命）提高。另外，能够抑制由切屑堵塞导致的切削阻力的增加，能够进行稳定的钻孔加工，并且能够进行钻孔加工的极限加工条件被放宽，能够扩大可加工区域。

Drill body of indexable drill and manufacturing method thereof

インデキサブル式ドリル１０のドリル本体１２に設けられる一対の第１ねじれ溝２４および第２ねじれ溝２６が、硬化熱処理が施された後にボールエンドミル３０、３２による切削加工で鏡面仕上げされているため、溝内面の摩擦が低減されて切り屑が良好に排出されるようになる。これにより、溝長Ｌが長い深穴加工用のインデキサブル式ドリル１０においても、切り屑詰まりに起因する摩耗や刃欠け、折損等が抑制されて耐久性（工具寿命）が向上する。また、切り屑詰まりによる切削抵抗の増加が抑制されて安定した穴明け加工が可能になるとともに、穴明け加工が可能な限界加工条件が緩和されて加工可能領域が拡大される。 Since the pair of first torsion grooves 24 and second torsion grooves 26 provided on the drill body 12 of the indexable drill 10 are mirror-finished by cutting by the ball end mills 30 and 32 after being subjected to curing heat treatment, the grooves The friction on the inner surface is reduced and chips are discharged well. Thereby, also in the indexable drill 10 for deep hole processing with a long groove length L, wear, blade chipping, breakage, and the like due to chip clogging are suppressed, and durability (tool life) is improved. In addition, an increase in cutting resistance due to chip clogging is suppressed and stable drilling can be performed, and limit machining conditions capable of drilling are relaxed, and a workable region is expanded.

Drill body of indexable drill and manufacturing method therefor

인덱서블식 드릴의 드릴 본체

인덱서블식 드릴 (10) 의 드릴 본체 (12) 에 형성되는 1 쌍의 제 1 비틀림 홈 (24) 및 제 2 비틀림 홈 (26) 이, 경화 열 처리가 실시된 후에 볼엔드밀 (30, 32) 에 의한 절삭 가공으로 경면 마무리되어 있기 때문에, 홈 내면의 마찰이 저감되어 절삭 부스러기가 양호하게 배출되게 된다. 이로써, 홈 길이 (L) 가 긴 심공 가공용 인덱서블식 드릴 (10) 에 있어서도, 절삭 부스러기 막힘에서 기인하는 마모나 치핑, 절손 등이 억제되어 내구성 (공구 수명) 이 향상된다. 또, 절삭 부스러기 막힘에 의한 절삭 저항의 증가가 억제되어 안정적인 천공 가공이 가능해짐과 함께, 천공 가공이 가능한 한계 가공 조건이 완화되어 가공 가능 영역이 확대된다.

Drill body of indexable drill

A drill main body of an indexable drill is disposed first and second spiral flutes on a column-shaped outer circumferential surface with an inner blade tip cutting a hole center side mounted on a tip portion of the first spiral flute and an outer blade tip cutting a hole outer circumferential side mounted on a tip portion of the second spiral flute and the drill main body discharges chips through the first spiral flute and the second spiral flute toward a shank while hole machining is performed with the inner blade tip and the outer blade tip. The drill is a deep hole machining drill having a length of the first spiral flute and the second spiral flute equal to or greater than 4D relative to a drill diameter D that is an outer diameter of the outer blade tip.

一种切削刀具及其刀头结构

本发明涉及精密加工工具技术领域，公开了一种切削刀具及其刀头结构，所述刀头结构包括连接部及设于所述连接部前端的切削刃部，所述切削刃部包括固定在连接部前端的切削主体及若干第一切削刃，所述切削主体的外表面为向外凸起的弧面，所述第一切削刃为螺旋状，所述第一切削刃的刃数S与所述切削主体直径D之间要满足以下关系：4D≤S≤15D；所述切削主体的直径D为0.5～32mm；所述第一切削刃的刃宽L为0.01㎜～0.1㎜。本发明的有益效果为：使用该切削刀具铣削曲面，相同的直径下刀刃分布密度高，表面粗糙度好，且加工效率高；将该切削刀具应用于CNC中以加工3D玻璃石墨模具时，表面粗糙度可达90nm。