Forming method and forming device

An object of the present invention is to provide a forming method and a forming machine in which in forming e.g., a round steel pipe, predetermined forming can be performed with less additional deformation imparted to a workpiece without deteriorating the productivity of the conventional roll forming, thereby manufacturing a high-quality product with high dimension precision. To achieve this object, the present invention provides a forming method and a forming machine, which adopt a rotating unit which rotatably moves on an endless track a die train having dies with outwardly directed and swingable forming passes in a breakdown step at an early forming stage, and in which the forming pass of each die holds the edge of the workpiece to rotatably move the die by changing the die to a predetermined angle, thereby realizing bending, so that problems due to twisting onto forming rolls and high locally-caused contact stress can be greatly reduced.

SQUARE TUBE FORMING METHOD AND SQUARE TUBE FORMING DEVICE

To enhance forming performance enhanced in square tube forming of forming a round tube into a square tube by passing the round tube through a plurality of roll stands arranged in a raw tube forming direction. To give a high degree of multi-usability to a square tube forming device. To suppress the entire length of a roll stand array. A first flat roll stand A and a second flat roll stand B of rolling directions orthogonal to each other are arranged alternately in a forming direction to form a roll stand array Each of the roll stands A and B includes roll gap adjusting means by which a rolling amount is independently settable, and one of the first flat roll stand A and the second flat roll stand B adjacent to each other is driven to rotate by roll driving means A forming rolling amount distribution is allocated individually as a rolling amount at each of the roll stands A and B. The forming rolling amount distribution is determined in advance for stands from a first-stage stand to a final-stage stand in response to the outer diameter, thickness, and material of a forming target raw tube and an intended dimension of a square tube as a product. 1. A square tube forming method of forming a round tube of any diameter as a forming target raw tube into a square tube of any dimension as a product by passing the round tube through a plurality of stages of roll stands arranged in a raw tube forming direction , comprising:using a flat roll stand array in which a first flat roll stand and a second flat roll stand of rolling directions orthogonal to each other are arranged alternately in a forming direction for a tube member and in which a rolling amount at each roll stand is independently settable;allocating a forming rolling amount distribution individually as a rolling amount at each roll stand in the flat roll stand array, the forming rolling amount distribution being determined in advance for the stands from a first-stage stand to a final-stage stand in response to the ...

PIPE CUTTING MACHINE

To provide a pipe cutting machine capable of cutting a pipe even of a large diameter efficiently in a short period of time, and achieving excellent economical efficiency and excellent durability with a simple, compact, and light-weight configuration. 1. A stationary or traveling pipe cutting machine that cuts a pipe at a right angle to the center line of the pipe , comprising:rotary blades in a pair, with a plane at a right angle to the center line of the pipe to be cut defined as an x-y plane and the center of the pipe defined as a coordinate origin, the rotary blades being arranged to face each other on both sides of a y axis in such a manner that blade edges of the rotary blades overlap each other in the direction of an x axis;a straightforward driving mechanism that drives the rotary blades in a pair straightforward in opposite directions of a y-axis direction so as to make the rotary blades in a pair pass each other on the x axis and in the vicinity of the x axis; anda power direction conversion mechanism that changes part of straightforward driving force in the y-axis direction to force in the x-axis direction and moves at least one of the rotary blades in a pair outwardly to get farther from the y axis for avoiding interference between the blade edges when the rotary blades in a pair pass each other on the x axis and in the vicinity of the x axis.2. The pipe cutting machine according to claim 1 , whereinthe power direction conversion mechanism comprises:a blade biasing mechanism that applies biasing force to at least one of the rotary blades in a pair inwardly to get closer to the y axis and holds the biased rotary blade at an inner movement limit; anda guide mechanism that causes the at least one of the rotary blades in a pair to make an outward retreating movement against the biasing force when the rotary blades in a pair pass each other on the x axis and in the vicinity of the x axis.3. The pipe cutting machine according to claim 2 , whereinthe blade ...

WELDED PIPE MANUFACTURING APPARATUS AND WELDED PIPE MANUFACTURING METHOD

To manufacture a high-quality welded pipe, there is provided a welded pipe manufacturing apparatus for manufacturing a welded pipe by bending a metal plate and welding butting end portions of the metal plate. The welded pipe manufacturing apparatus includes a bending unit that bends the metal plate, a light emitter that emits directional light to an inner surface of the metal plate bent by the bending unit, an image capturing unit that captures light emitted by the light emitter and reflected by a surface of the metal plate, and an adjustment assistance unit that assists adjustment of the bending unit in accordance with a shape of the reflected light. 1. A welded pipe manufacturing apparatus for manufacturing a welded pipe by bending a metal plate and welding butting end portions , comprising:a bending unit that includes a pair of bending die arrays that continuously constrain the end portions of the metal plate and a roller group that abuts against a central portion of the metal plate and supports the central portion, and bends the metal plate;a light emitter that emits directional light to an inner surface of the bent metal plate;an image capturing unit that captures light emitted by said light emitter and reflected by the metal plate; andan adjustment assistance unit that assists at least one of position adjustment of the bending die arrays and position adjustment of the roller group in accordance with a shape of the reflected light.2. The welded pipe manufacturing apparatus according to claim 1 , wherein said adjustment assistance unit includes a display unit that displays the shape of the reflected light.3. The welded pipe manufacturing apparatus according to claim 2 , wherein said display unit displays a designed shape of the inner surface of the metal plate together with the shape of the reflected light.4. The welded pipe manufacturing apparatus according to claim 1 , whereinsaid bending unit includes a support roller that supports the metal plate from below, ...

Pipe cutting machine

To provide a pipe cutting machine capable of cutting a pipe even of a large diameter efficiently in a short period of time, and achieving excellent economical efficiency and excellent durability with a simple, compact, and light-weight configuration. A pipe cutting machine cuts a pipe 10 at a right angle to the center line of the pipe 10. The pipe cutting machine comprises: rotary blades 20, 20 in a pair, with a plane at a right angle to the center line of the pipe 10 to be cut defined as an x-y plane and the center of the pipe 10 defined as a coordinate origin, the rotary blades being arranged to face each other on both sides of a y axis in such a manner that blade edges of the rotary blades 20, 20 overlap each other in the direction of an x axis; a straightforward driving mechanism 50 that drives the rotary blades 20, 20 in a pair straightforward in opposite directions of a y-axis direction so as to make the rotary blades 20, 20 in a pair pass each other on the x axis and in the vicinity of the x axis; and a power direction conversion mechanism 46 and a power direction conversion mechanism 47 that change part of straightforward driving force in the y-axis direction to force in the x-axis direction and move the rotary blades 20, 20 in a pair outwardly to get farther from the y axis for avoiding interference between the blade edges when the rotary blades 20, 20 in a pair pass each other on the x axis and in the vicinity of the x axis.

Forming method and forming device

An object of the present invention is to provide a forming method and a forming machine in which in forming e.g., a round steel pipe, predetermined forming can be performed with less additional deformation imparted to a workpiece without deteriorating the productivity of the conventional roll forming, thereby manufacturing a high-quality product with high dimension precision. To achieve this object, the present invention provides a forming method and a forming machine, which adopt a rotating unit which rotatably moves on an endless track a die train having dies with outwardly directed and swingable forming passes in a breakdown step at an early forming stage, and in which the forming pass of each die holds the edge of the workpiece to rotatably move the die by changing the die to a predetermined angle, thereby realizing bending, so that problems due to twisting onto forming rolls and high locally-caused contact stress can be greatly reduced.

Method and device for molding square tube

[Problem to be solved] To enhance forming performance enhanced in square tube forming of forming a round tube into a square tube by passing the round tube through a plurality of roll stands arranged in a raw tube forming direction. To give a high degree of multi-usability to a square tube forming device. To suppress the entire length of a roll stand array.[Solution] A first flat roll stand 20A and a second flat roll stand 20B of rolling directions orthogonal to each other are arranged alternately in a forming direction to form a roll stand array 10. Each of the roll stands 20A and 20B includes roll gap adjusting means by which a rolling amount is independently settable, and one of the first flat roll stand 20A and the second flat roll stand 20B adjacent to each other is driven to rotate by roll driving means 40. A forming rolling amount distribution is allocated individually as a rolling amount at each of the roll stands 20A and 20B. The forming rolling amount distribution is determined in advance for stands from a first-stage stand to a final-stage stand in response to the outer diameter, thickness, and material of a forming target raw tube and an intended dimension of a square tube as a product.

Method and device for producing metal pipe

To improve forming performance in a smart mill allowing implementation of required forming by moving a forming tool arranged in a stand of a pipe mill automatically to a predetermined position.Non-drive type breakdown rolls BD exclusive to bending are arranged in multiple stands. Drive roll DR stands exclusive to driving are arranged in stages in front of and behind each DR stand. The drive roll DR is configured to apply thrust to a central portion of a raw material using an upper flat roll and a lower flat roll, and has thrust control means and driving rotation number control means for applying thrust required for passage through the step using the drive rolls DR in multiple stages entirely and controlling the thrust. Applying the thrust under pressure control to the central portion of the material using the upper and lower flat rolls at the DR stand provides a definite roll reference diameter and feeds the raw material at a constant speed and thrust, making it possible to ensure thrust required for various product diameters or thicknesses.

Metal tube manufacturing method and device

Processing method for optical fibre monitoring data in a wide range of scour pit at the end of the soft raft for bank-revetment

Disclosed is a processing method for optical fibre monitoring data in a wide range of scour pit at the end of the soft raft for bank-revetment, wherein the calculation formula of the scouring deformation form of the soft raft is as follows: r“ | _ \ :=' r cash -] ‚NEW-.a- —- H . rijpt-"‘ k” H ; flâpf The calculation formula of the final tensile elongation after the deformation of the soft raft is as follows: f' . ï+lpf : .„ :zí l— ;…{ÊHAH {hr—2; . ln the equation, Z is the final floating or sinking depth of the soft raft for bank-revetment; H is the tensile strength of the polypropylene woven fabric of the soft raft in the bit width; x is the scouring pit range (The range value is 0 in the middle of the head of the soft raft for bankrevetment); y is the weight (per unit length) of the raft and the ballast (D-type interlocking block) above it; p is the density of water flow; v is the velocity of water flow; I7 is a dimensionless adjustment parameter. The invention can be used for monitoring in real-time the scouring deformation characteristics of the soft raft for bank-revetment.

Processing method for optical fibre monitoring data in a wide range of scour pit at the end of the soft raft for bank-revetment

Disclosed is a processing method for optical fibre monitoring data in a wide range of scour 5 pit at the end of the soft raft for bank-revetment, wherein the calculation formula of the scouring deformation form of the soft raft is as follows: r“ | _ \ :=' r cash -] ‚NEW-.a- —- H . rijpt-"‘ k” H ; flâpf 10 The calculation formula of the final tensile elongation after the deformation of the soft raft is as follows: f' . ï+lpf : .„ :zí l— ;…{ÊHAH {hr—2; . 15 ln the equation, Z is the final floating or sinking depth of the soft raft for bank-revetment; H is the tensile strength of the polypropylene woven fabric of the soft raft in the bit width; x is the scouring pit range (The range value is 0 in the middle of the head of the soft raft for bank- revetment); y is the weight (per unit length) of the raft and the ballast (D-type interlocking block) above it; p is the density of water flow; v is the velocity of water flow; I7 is a dimensionless 20 adjustment parameter. The invention can be used for monitoring in real-time the scouring deformation characteristics of the soft raft for bank-revetment.

Method and device for producing metal pipe

Containers and systems for medical device transportation

A container for medical device transportation is provided. The container may include a body including a cavity for accommodating a medical device; a support for supporting the medical device; and a guiding mechanism for guiding the support to move from an entrance of the body to a target position in the cavity.