Barrel worm-shaped tool

Technical Field

The invention relates to a barrel-shaped worm-shaped tool, the barrel-shaped worm-shaped tool for the internal gear after the heat treatment of the good precision in finishing grinding treatment.

Technical Field

The common gear processing method, first of all, a predetermined gear material through shaping processing to the cutting of the gear shape. Then the gear formed by this heat treatment is carried out, after this, the heat-treated gear for finishing (through grinding processing), in order to remove the heat generated by processing such as the deformation of the. Such as WA superhard grinding wheel and the grinding wheel (for example, diamond grinding wheel and CBN grinding wheel) of the tool of the various conventional types of tooth profile grinding method has been used for the gear tooth surface of the heat treatment the purpose of the fine machining in a high efficiency. For this purpose corresponding to the tool has to be ground of the gear form various shapes. Some examples of these shape of the cutting tool comprises an outer gear shape, the shape of the shape of the internal gear and the worm.

In various types of gear, internal gear is usually used for such as for motor vehicle transmission systems in the apparatus. To improve the precision of the growing demand. In this case, valeant literature 1 discloses a profile grinding method, the method is used for using the barrel-shaped, worm-shaped tool for grinding the tooth face of the gear the purpose of the fine machining. Valeant literature 1 is raised in a barrel-shaped worm-shaped tool for edge of the outline of the calculation method. The calculated edge outline of the tool and the grinding of the final tooth form of the internal matching state.

[Valeant literature 1] of next cyclopentadieneear of room "inner [...][...] co-service [...] shape [...] a [...][...][...] tool", 1996 years 1 month, Japan mechanical Society (arranging C) collection , 62 roll, 593, , section 284-290 page

Content of the invention

The problem solved by the invention

The with reference to Figure 8 and Figure 9 using the above-mentioned generic documents all of the barrel-shaped worm-shaped tool (hereinafter referred to as the grinding wheel 12) to carry out the inner gear (hereinafter referred to as the inner gear 11) of the case of grinding, to provide a described.

Figure 8 shows a proposed by the above-mentioned valeant in the literature of the blade 31 is formed on the grinding wheel 12 in. when emery wheel 12 is used for grinding the internal gear 11, the, , form gear 11 in tooth machining allowance (process margin) 21 prevent the blade 31 and tooth machining allowance 21 proper engagement.

Utilizing the above-mentioned structure, the internal gear 11 tooth and emery wheel of 12 with the edge of the grinding wheel 12 and the inner gear 11 contact the inner peripheral surface. Only the grinding wheel 12 the axial two ends of the blade 31 with the internal gear 11 the machining allowance of tooth 21 phase contact. In other words, as shown in Figure 9, the active face 31b of the cut tooth machining allowance 21 in. The active face 31b located in the position of the grinding wheel 12 the axial two ends of the blade 31 on the outer side of the.

In this sunblade-dentatum matching state grinding processing may be carried out under the produce localized at the beginning of grinding treatment applied to the grinding wheel 12 to the two ends of the axle of the heavy load. May produce heavy load locally some of the results of the load and that the irregularity of the wear of a part.

As to this, as has been described, the barrel-shaped grinding wheel 12 are concerned, is not expected, barrel-shaped grinding wheel 12 to the two ends of the shaft of the inner gear 11 prior to the contact of the grinding wheel 12 at the axial middle of the inner gear 11 of the contact. On the contrary, is desired, the internal gear 11 and the grinding wheel 12 evenly to the entire area of contact, or the inner gear 11 and the grinding wheel 12 at the axial middle of the contact.

Therefore, the aim of the invention is to realize the above-mentioned purpose. More specifically, the purpose of this invention is to provide a barrel-shaped worm-shaped tool, the barrel-shaped worm-shaped tool can reduce processing load and local wear, and contribute to high-precision gear processing.

The technological scheme of problem solving

To achieve the above object, according to the present invention 1st of the barrel-shaped worm-shaped tool used for the internal gear a gear processing barrel shaped worm-shaped tool, and is formed in the: barrel-shaped worm-shaped tool from the axial direction of the two ends of the barrel-shaped worm-shaped tool the middle part in the axial direction, its diameter is gradually increased. In the barrel-shaped worm-shaped tool, the barrel-shaped worm-shaped tool is formed: according to the machining allowance of the internal gear, located in the barrel-shaped worm-shaped tool towards the blade in the middle of the axial direction of the barrel-shaped worm-shaped tool is located at the axial two ends of the blade, blade is gradually reduced.

To achieve the above object, according to the present invention the 2nd the characteristic of the barrel-shaped worm-shaped tool is as follows. According to the present invention the 1st in the barrel-shaped worm-shaped tool, located in axial middle part of the blade is designed to: and of the internal gear after processing of the corresponding to the shape of the tooth-shaped meshing. Furthermore, located in axial two ends of the blade is designed to:of the internal gear with the corresponding to the shape of the serrated engagement machining allowance.

To achieve the above object, according to the present invention the 3rd the characteristic of the barrel-shaped worm-shaped tool is as follows. According to the present invention the 1st in the barrel-shaped worm-shaped tool, the barrel-shaped worm-shaped tool is formed to: the thickness of the blade is gradually reduced.

To achieve the above object, according to the present invention in the 4th the characteristic of the barrel-shaped worm-shaped tool is as follows. According to the present invention the 1st in the barrel-shaped worm-shaped tool, the barrel-shaped worm-shaped tool is formed to: the height of the blade is gradually reduced.

To achieve the above object, according to the present invention the 5th the characteristic of the barrel-shaped worm-shaped tool is as follows. According to the present invention the 1st in the barrel-shaped worm-shaped tool, the barrel-shaped worm-shaped tool is formed to: the height of the bottom surface of the blade is gradually reduced.

The effect of this invention

A barrel of this invention are formed as worm-shaped tool: machining allowance according to the internal gear, of the in the middle of the axial direction from the blade towards the located in axial two ends of the blade, the size of the blade thereof to gradually become smaller. Therefore, processing load can be reduced and the local abrasion, and can carry out high-precision grinding processing.

Description of drawings

Figure 1 is view of the grinding machine shown the internal gear of the inner gear and the grinding wheel support structure;

Figure 2 is view of 1st shown according to the present invention of the embodiment of the shape of the grinding wheel;

Figure 3 is view of 1st shown in the embodiment according to the present invention the grinding wheel for grinding the inner gear;

Figure 4 is view of 2nd shown in the embodiment according to the present invention the grinding wheel for grinding the inner gear;

Figure 5 is view of 3rd shown in the embodiment according to the present invention the grinding wheel for grinding the inner gear;

Figure 6 is view of 4th shown in the embodiment according to the present invention the grinding wheel for grinding the inner gear;

Figure 7 is view of 5th shown in the embodiment according to the present invention the grinding wheel for grinding the inner gear;

Figure 8 is view of shown conventional-type grinding wheel for grinding the inner gear;

Figure 9 is enlarged view of Figure 8 the main portion.

Mode of execution

The below detailed description with reference to the attached diagram according to the present invention, the barrel-shaped worm-shaped tool. In all embodiments, the structure and function similar to the components given the same reference label. Repeated description will be omitted.

Figure 1 is view of the grinding machine shown the internal gear of the inner gear and the supporting structure of the wheel; Figure 2 is view of 1st shown according to the present invention of the embodiment of the shape of the wheel; Figure 3 is view of 1st shown in the embodiment according to the present invention the grinding wheel for grinding the inner gear; Figure 4 is a view of showing 2nd embodiment according to the present invention the grinding wheel for grinding the inner gear; Figure 5 is a view of showing 3rd embodiment according to the present invention the grinding wheel for grinding the inner gear; Figure 6 is view of 4th shown in the embodiment according to the present invention the grinding wheel for grinding the inner gear; Figure 7 is a view of showing the invention according to the 5th embodiment of the grinding wheel for grinding the inner gear.

Figure 1 shows a gear for outside (hereinafter referred to as the inner gear) 11 workpiece and the grinding wheel 12 of the barrel-shaped worm-shaped tool. The inner gear 11 and the grinding wheel 12 can be detachably supported on a not shown the internal gear of the grinding machine. Driving the inner gear grinding machine, the grinding wheel 12 grinding the inner gear 11. Subsequently will be described the details of the grinding treatment.

The inner gear 11 is attached around the vertical workpiece rotation axis can be C1 to rotate. The grinding wheel 12 is attached around the grinding wheel to a rotating shaft of rotating B, the rotating shaft of the grinding wheel rotary shaft relative to a workpiece B C1 into a predetermined shaft (shaft crossing angle) A1. At the same time, supporting the grinding wheel 12 is: along the X axis direction (the feeding direction of the machine) horizontally extending radial and X1; extends vertically along the Z-axis direction of the feed shaft axial direction of the rotation of the workpiece is Z1; and along the Y axis direction (width direction of the machine) horizontally extending horizontal axis Y1, Y axis direction orthogonal to the X axis direction and the Z axis direction. Therefore, by supporting the grinding wheel 12 can move along the X axis, Y axis and Z axis direction.

Subsequently, the with reference to Figure 2 to describe the internal gear 11 and the grinding wheel 12 shape. In the grinding wheel 12 before grinding, by including in the predetermined material used for gear on the drilling processing and cutting processing on the processing of (gear shaping machine; processing) to form the inner gear 11. Hygrothermality formed by this is then heat treatment, and into the inner gear 11. Before the grinding treatment, the internal gear 11 and the inner peripheral surface as having formed therein the machining allowance of processing allowance of the tooth 21. Tooth machining allowance 21 includes top surface 21a, surface 21b and the bottom surface 21c. The top 21a and the tooth surface 21b forming the tooth machining allowance 21 teeth. The use of the grinding wheel 12, gear grinding machining allowance 21 of the final processing after the tooth 22, the tooth 22 comprises a tip 22a, tooth surface 22b and the bottom surface 22c. Tip 22a and tooth surface 22b forming the tooth 22 teeth. Here, tooth 21 can have excess of the value of the arbitrary determined.

The grinding wheel 12 is a barrel-shaped worm, wherein two ends of the shaft to each of the ends of the middle part in the axial direction, its diameter is gradually increased. Spiral blade 31 formed in the grinding wheel 12 in the outer peripheral surface. Although the internal gear 11 the machining allowance of tooth 21 and its tooth 22 of the tooth having a corresponding internal gear specifications, however, blade 31 specifications of the worm (external gear specifications) to allow blade 31 and processing the rest tooth 21 and a gear 22 is meshed with two properly. Furthermore, blade 31 is formed in the: from the grinding wheel 12 of the blade to at the axial middle of the grinding wheel 12 the axial two ends of the blade, the size of the blade is gradually reduced. Blade 31 including belongs 31a, the active face 31b and a bottom surface 31c. Belongs 31a and the active face 31b forming the blade 31 of the blade.

In other words, the grinding wheel 12 of the blade 31 is designed as follows. The abrasive wheel 12 at the axial middle of the, blade 31 with the internal gear 11 of the corresponding tooth 22 is engaged. At the same time, the abrasive wheel 12 to the two ends of the shaft of, blade 31 can and the inner gear 11 the machining allowance of tooth 21 engaged. From the grinding wheel 12 at the axial middle of the blade 31 located in the grinding wheel 12 the axial two ends of the blade 31, blade 31 of both thickness and height is reduced gradually. In order to gradually reduces the edge thickness, from the grinding wheel 12 at the axial middle of the reference blade 31 of the active face 31b corresponding to the position of the, each blade on both sides of the active face 31b must be gradually to the position of the shift.

The grinding wheel 12 grinding the inner gear 11 from causes the emery wheel 12 to move to the processing position, at the same time, the grinding wheel 12 to angle A1 to angle. The radial axle X1, horizontal axis Y1 and the rotation of the workpiece axis direction feed shaft Z1 for causes the emery wheel 12 the purpose of movement. As shown in Figure 1, by the movement of the grinding wheel 12 of the blade and the inner gear 11 is matched with the corresponding tooth. Furthermore, in the internal gear 11 rotating around the work piece C1 to rotate, the grinding wheel 12 B around the grinding wheel at the same time rotation of the rotating shaft, so that the grinding wheel 12 by means of the rotation of the workpiece axis direction feed shaft Z1 in the Z axis direction oscillation.

Grinding treatment started in this way. Allow grinding wheel 12 of the blade 31 tooth grinding machining allowance 21 internal gear 11 of the whole area in the width direction. Here, are engaged with each other the inner gear 11 and the grinding wheel 12 to rotate simultaneously with each other, at the same time, the internal gear 11 axis and emery wheel of the 12 shaft together to form a shaft A1. Therefore, the internal gear 11 and the tooth face of the grinding wheel 12 and the relative sliding between the blade speed increases, and the relative sliding speed is increased and also can increase the grinding speed.

The cooperation of the blade and carried out, so as to be disposed at the grinding wheel 12 at the axial middle of the reference blade 31 can and the inner gear 11 corresponding to the machining allowance of the tooth 21 fit. Therefore, in the middle of the axle direction is located in the reference blade 31 can and the inner gear 11 of the corresponding tooth 22 the shape of the meshed, but reference blade 31 can also be and the inner gear 11 the machining allowance of tooth 21 engaged. Furthermore, as mentioned above, the grinding wheel 12 the axial two ends of the blade 31 with the internal gear 11 corresponding to the machining allowance of the tooth 21 engaged. Moreover, the grinding wheel 12 of the blade 31 is formed in the: from the grinding wheel 12 at the axial middle of the blade 31 to the grinding wheel 12 the axial two ends of the blade, blade 31 of the thickness and height can be gradually reduced. Therefore, blade 31 to the abrasive wheel 12 on the whole area in the axial direction of the inner gear 11 the machining allowance of tooth 21 properly engaged.

Subsequently, when the grinding wheel 12 by means of the radial axle X1 along the X axis direction, inwardly facing gear 11 is increased the amount of feed of, the grinding wheel 12 of the blade 31 gradually grinding the inner gear 11 the machining allowance of tooth 21. Furthermore, on the grinding wheel 12 axial blade 31 of all regional, because the amount of feed is increased, from the grinding wheel 12 to the shaft of the two ends at the axial middle thereof, actual relates to a grinding machining allowance tooth 21 gradually narrowing the area.

Once the grinding wheel 12 has along the X-axis direction of the feed of a predetermined amount, all of the machining allowance has grinding of tooth 21. As a result, form a tooth 22, and finish grinding processing. The grinding wheel 12 at the axial middle of the blade 31 implementation of tooth 22 of the final stage is formed.

Here, blade 31 belongs of 31a gradually grinding and processing allowance tooth 21 of the bottom surface 21c, in order to form the tooth 22 of the bottom surface 22c. Furthermore, blade 31 of the active face 31b gradually grinding and processing allowance tooth 21 of the tooth surface 21b, in order to form the tooth 22 of the tooth surface 22b. Furthermore, blade 31 bottom surface 31c gradually grinding and processing allowance tooth 21 of the tip 21a, in order to form the tooth 22 top surface of the.

An optional structure there are the following possible situation, blade 31 is formed in the: from the grinding wheel 12 at the axial middle of the blade 31 to the grinding wheel 12 the axial two ends of the blade 31, blade 31 of the thickness and the height can be reduced gradually. In an alternative structure, in order to gradually reduces the edge thickness, as shown in Figure 4, only the blade 31 on the outside of the active face 31b can be from the position of the grinding wheel 12 at the axial middle of the reference blade 31 of the active face 31b gradually the corresponding position to the inner shift.

In another optional configuration, blade 31 can be formed as: from the grinding wheel 12 to the shaft in the middle part of the blade 31 located in the grinding wheel 12 the axial two ends of the blade 31, only blade 31 to gradually reduce the thickness of the. In this case, in order to gradually reduces the edge thickness, as shown in Figure 5, only the blade 31 on the outside of the active face 31b can be from the position of the grinding wheel 12 at the axial middle of the reference blade 31 of the active face 31b gradually the corresponding position to the inner shift. In another optional structure, in order to gradually reduces the edge thickness, as shown in Figure 6, blade 31 at the two sides of the active face 31b can be from the position of the grinding wheel 12 at the axial middle of the reference blade 31 of the active face 31b gradually the corresponding position to the inner shift.

The following re-one possible conformation situation can be selected, blade 31 is formed in the: from the grinding wheel 12 at the axial middle of the blade 31 to the grinding wheel 12 the axial two ends of the blade 31, blade 31 of the thickness and the height can be reduced gradually. In a further alternative configuration, as shown in Figure 7, the bottom surface 31c is gradually reduced the height can also be. Although the tooth 21 of the tip 21a and the bottom 31c collision, is meshed with the above-mentioned structure, however, help to reduce the collision occurring at the time.

As to this, as has been described, according to the present invention in the barrel-shaped worm-shaped tool, the grinding wheel 12 of the blade 31 is formed in the: according to the gear 11 the machining allowance of, from the grinding wheel 12 in the middle of the axial direction of the grinding of the blade to the 12 shaft to the two ends of the blade, the size of the blade can be gradually reduced. Therefore, when the blade and the same gear, to the grinding wheel 12 at the axial middle of the blade 31 on the outer side of the blade 31, the grinding wheel 12 to the two ends of the shaft of each blade 31 on the outer side of the active face 31b and processing the rest tooth 21 of the corresponding tooth 21b proper contact. Therefore, blade 31 in the blade 31 in the axial direction of the machining allowance on the whole area of the tooth 21 engaged. As a result, processing load can be reduced and the local abrasion, it is possible to conduct grinding processing with high precision.

Industrial practicability

The invention is suitable for use in the, barrel-shaped worm gear-shaped tool of the cogging.