JP5924798B1 - Gear edge cutting tool and gear edge cutting device - Google Patents

Abstract

A gear edge cutting tool and a gear edge cutting device capable of cutting both a side edge and a bottom edge of a gear are provided. A gear edge cutting tool 10 according to the present invention includes a second cutting blade portion 31 connected to one end portion of a first cutting blade portion 21 capable of cutting a side edge 92B of a gear 90. As the second blade 32 that is the blade of the cutting blade 31 is connected to the first blade 22 that is the blade of the first cutting blade 21 and moves away from the first blade 22, the first blade 21 It has a shape extending gradually away from the reference straight line extended from. The bottom edge 92 </ b> A of the gear 90 can be cut off by the second cutting blade portion 31. [Selection] Figure 10

Description

  The present invention relates to a gear edge cutting tool and a gear edge cutting device for cutting an edge of a gear tooth.

  Conventionally, as this type of gear edge cutting tool, a cutting blade portion that is addressed by crossing a blade line obliquely with respect to a side edge of a gear tooth (an edge formed by intersecting a tooth meshing surface and a gear side surface) is used. What was provided is known (for example, refer patent document 1). In this case, the side edge can be excised from the tooth bottom side toward the tooth tip side by moving the cutting blade portion relative to the tooth in the tooth thickness direction.

Japanese Patent No. 5550187 ([0036], FIG. 7)

  However, the conventional gear edge cutting tool described above has a problem that it cannot cut the bottom edge of the gear where the tooth bottom and the gear side face intersect.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a gear edge cutting tool and a gear edge cutting device capable of cutting both a side edge and a bottom edge of a gear.

  In order to achieve the above object, the invention according to claim 1 is arranged between adjacent teeth of a gear, and is addressed by obliquely intersecting a blade edge with a side edge of one tooth. When the cutting blade portion is provided and the first cutting blade portion is moved relative to the tooth in the tooth thickness direction, the first cutting blade portion cuts the side edge from the root side toward the tooth tip side. However, in the gear edge cutting tool that gradually slips out between the adjacent teeth in the tooth width direction, a second cutting blade portion connected to an end portion of the first cutting blade portion that cuts the bottom side of the side edge is provided. The second cutting edge of the second cutting blade portion is connected to the first cutting edge of the first cutting blade portion and is separated from the first cutting blade as the first cutting blade portion. Gear edge extending away from the reference straight line extending from the blade line. It is an ablation tool.

  In the invention of claim 2, the rake face of the first cutting blade portion and the rake face of the second cutting blade portion are continuous, and the crossing angle between the rake face of the first cutting blade portion and the flank surface, The gear edge cutting tool according to claim 1, wherein the crossing angle between the rake face and the flank face of the second cutting blade portion is small.

  A third aspect of the present invention is the gear edge cutting tool according to the first or second aspect, wherein the rake face of the first cutting blade portion is curved or bent in a concave shape along the first blade line.

  The invention according to claim 4 is the gear edge cutting tool according to claim 3, wherein the rake face of the first cutting blade portion is an involute curved surface.

  The invention according to claim 5 is the gear edge resection according to any one of claims 1 to 4, wherein the flank face of the first cutting blade portion is curved or bent in a concave shape along the first blade line. Is a tool.

  A sixth aspect of the present invention is the gear edge cutting tool according to the fifth aspect, wherein the flank of the first cutting blade portion is an involute curved surface.

  The invention according to claim 7 is a shaft portion, a tip plate portion projecting laterally from the tip of the shaft portion, and having the first cutting blade portion and the second cutting blade portion on an outer edge portion, and the tip plate portion Of which the inner surface facing the shaft portion side forms the rake face of the first cutting blade portion and the second cutting blade portion, and the side surface of the tip plate portion is the first cutting blade portion and the second cutting blade. The gear edge cutting tool according to any one of claims 1 to 6, wherein the gear edge cutting tool forms a flank face of the blade portion.

  The invention according to claim 8 is the gear edge resection according to claim 7, wherein the tip plate portion has a line-symmetric shape, and has the first cutting blade portion and the second cutting blade portion on both sides sandwiching the center of symmetry. Is a tool.

  The invention according to claim 9 is such that the first blade line is inclined so as to approach the symmetry center line as it approaches the second blade line, and the inclination angle is arranged in parallel with the gear side surface. The gear edge cutting tool according to claim 8, wherein the first cutting blade portion is set at an angle that is suitably addressed to the side edge.

  A tenth aspect of the present invention is the gear edge cutting tool according to the eighth or ninth aspect, wherein the tip plate portion has a line-symmetric shape in two vertical and horizontal directions.

  The invention of claim 11 is the gear edge cutting tool according to any one of claims 7 to 10, the rotating jig that holds and rotates the gear as the gear, and the gear edge cutting tool. A gear edge cutting device including a tool holder that holds a shaft portion and supports the shaft so as to be tiltable in a direction parallel to the rotation axis direction of the rotating jig, and urges the gear edge cutting tool to a fixed tilting posture.

  The invention according to claim 12 is a first drive mechanism having a first output unit that can be positioned and controlled at an arbitrary position on a two-dimensional plane, and a rotation axis that is attached to the first output unit and is parallel to the two-dimensional plane. A second drive mechanism having a second output section that rotates about the second output section, and a third output section that is attached to the second output section and linearly moves in a direction perpendicular to the rotation axis of the second output section. A robot having a third drive mechanism and a fourth drive mechanism that is attached to the third output unit and has a fourth output unit that rotates about a rotation axis parallel to the linear motion direction of the third output unit; The tool holder is fixed to the fourth output portion so that the shaft portion of the gear edge cutting tool extends along the rotation axis direction of the fourth output portion, and the rotating jig includes The rotation axis is parallel to the two-dimensional plane and the second axis A Giyaejji resecting device of claim 11, which is disposed such that the direction orthogonal to the rotation axis of the output unit.

  In order to cut out the edge of the gear with the gear edge cutting tool according to claim 1, the first cutting blade portion is disposed between adjacent teeth, and the second cutting blade which is the cutting blade of the second cutting blade portion is geared. The gear edge resection tool may be moved relative to the tooth in one of the tooth thickness directions. Then, the 2nd cutting blade part cuts out a bottom edge, gets on the corner part by the side edge side of the bottom edge, and gradually comes out in the tooth width direction from between adjacent teeth, and the 1st cutting blade The first blade which is the blade of the part crosses the side edge obliquely. When the gear edge excision tool is further moved relative to one side in the tooth thickness direction from there, the first cutting blade part cuts the side edge from the root side toward the tooth tip side, and the tooth width between adjacent teeth. Gradually exit in the direction and the gear edge resection tool moves between the next adjacent teeth. In this way, one side edge and bottom edge of the plurality of teeth can be efficiently excised. Moreover, the other side edge and bottom edge in a plurality of teeth can be efficiently cut by moving the gear edge cutting tool relative to the other side in the tooth thickness direction. That is, according to the gear edge cutting tool of the present invention, both the side edge and the bottom edge of each tooth of the gear can be cut efficiently by moving the tooth relative to the gear tooth in the tooth thickness direction.

  The gear edge cutting tool may be prepared separately for a gear edge cutting tool for one side edge of a tooth and a gear edge cutting tool for the other side edge. As described above, a gear edge cutting tool that includes the first cutting blade portion and the second cutting blade portion on both sides of the center of symmetry and can cut one side and the other side edge in the tooth thickness direction may be prepared. .

  The second blade line described above may be linear or curved. Moreover, only the edge part by the side of a 1st blade line may comprise the curvilinear form which continues to a 1st blade line, and the other than that may be linear. Furthermore, you may make it a curved shape so that a curvature may become large gradually as a 2nd blade line leaves | separates from a 1st blade line.

  The gear edge cutting tool according to claim 2, wherein the crossing angle between the rake face and the flank face of the first cutting blade part and the crossing angle between the rake face and the flank face of the second cutting blade part may be the same. Thus, the side edge, the bottom edge, and the amount of excision can be reduced by reducing the intersection angle between the rake face and the flank face of the second cutting blade portion from the intersection angle between the rake face and the flank face of the first cutting edge portion. A balance can be made suitable.

  According to the gear edge cutting tool of claims 3 to 6, it becomes possible to easily cut the side edge of the involute gear.

  As in the gear edge cutting tool according to claim 7, if the structure is provided with the first cutting blade portion and the second cutting blade portion on the tip plate portion that protrudes laterally from the tip of the shaft portion, the shaft portion can be tilted. The gear edge cutting tool is moved in the gear tooth arrangement direction (that is, the tooth thickness direction) by urging it so that it is held in a constant posture and easily cutting the side edge and the bottom edge as described above. It can be carried out.

  According to the gear edge cutting device of claim 11, the gear edge cutting tool is moved relative to the teeth of the gear in the tooth thickness direction by rotating the gear as a gear by the rotating jig, so that the side edges of the plurality of teeth. In addition, the bottom edge can be efficiently cut off.

  According to the configuration of the twelfth aspect, the side edge and the bottom edge of the plurality of gears can be removed by the teaching playback of the robot.

1 is a perspective view of a gear edge cutting tool and a gear according to a first embodiment of the present invention. An enlarged perspective view of a part of a gear Side view of gear edge cutting tool Side view of gear edge cutting tool Partially enlarged side view of the tip of the gear edge cutting tool Top view of gear edge cutting tool (A) Sectional view of the AA section of FIG. 6, (B) Sectional view of the section BB of FIG. Side view of tool holder Partial side view with gears attached to rotating jig (A) The side view which looked at the gear edge cutting tool which cuts off the bottom edge from the tooth width direction, (B) The side view which looked at the gear edge cutting tool which cuts off the bottom edge from the tooth thickness direction (A) The side view which looked at the gear edge resection tool which cuts a side edge from the tooth width direction, (B) The side view which looked at the gear edge resection tool which cuts the side edge from the tooth thickness direction The top view of the gear edge cutting tool of 2nd Embodiment (A) Partially enlarged side view of the tip of the gear edge cutting tool of the third embodiment, (B) Plan view of the gear edge cutting tool (A) Partially enlarged side view of the tip of the gear edge cutting tool of the fourth embodiment, (B) Plan view of the gear edge cutting tool The side view which looked at the state which the gear edge excision tool of 5th Embodiment is excising the side edge from the tooth width direction The top view of the gear edge cutting tool of 6th Embodiment Side view before the gear edge cutting tool of the seventh embodiment is applied to the gear Front view of gear edge cutting device of eighth embodiment Side sectional view of the gear edge cutting device The top view of the gear edge cutting tool of the modification of this invention

[First Embodiment]
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a gear edge cutting tool 10 according to the present embodiment and a gear 90 as an example of a gear to be processed by the gear edge cutting tool 10.

  The gear 90 is an involute gear and has, for example, a cylindrical shape and a plurality of teeth 91 on the outer peripheral surface. The gear side surfaces 90S and 90S at both ends in the axial direction of the gear 90 are flat as a whole. Further, as shown in an enlarged view in FIG. 2, the meshing surface 93B of the tooth 91 is an involute curved surface and swells in the tooth thickness direction H1. The inner peripheral surface 90N, the tooth bottom surface 93A, and the tooth tip surface 93C of the gear 90 are concentric circles, and between the tooth bottom surface 93A and the meshing surface 93B are corner curved surfaces 93D and 93D that are continuous with them.

  The gear 90 is manufactured, for example, by cutting a metal material with a hob cutter or the like. At that time, a burr may remain at an edge of the gear 90 where the gear side surface 90S and the other surface are orthogonal to each other. Even if no burrs are left, stress may concentrate on a part of the edge and chip off as a metal piece. If these burrs and metal pieces enter the meshing surfaces of the gears 90 and 90, the rotational resistance of the gear 90 increases and the gear 90 is worn. Therefore, the gear edge cutting tool 10 of the present embodiment is used to remove burrs and edges of the gear 90.

  Specifically, the gear 90 includes a top edge 92C in which the gear side surface 90S and the tooth tip surface 93C intersect, a side edge 92B in which the gear side surface 90S and the meshing surface 93B intersect, and a gear side surface 90S. A bottom edge 92A formed by intersecting the tooth bottom surface 93A, a corner edge 92D formed by intersecting the gear side surface 90S and the corner curved surface 93D, and an inner edge 90A formed by intersecting the gear side surface 90S and the inner peripheral surface 90N. And are provided. Then, the gear edge cutting tool 10 is used to remove the side edge 92B, the bottom edge 92A, and the corner edge 92D between them, and the other edges (the top edge 92C and the inner edge 90A) are not shown. Removed by the tool.

  As shown in FIG. 3, the gear edge cutting tool 10 has a structure in which a tip plate portion 15 is provided at the tip of a shaft portion 14, and is manufactured, for example, by so-called cutting from a round bar-shaped base material. The shaft portion 14 includes a small diameter portion 11, a large diameter portion 12, and a band plate portion 13 that are arranged from the proximal end side toward the distal end. The small diameter portion 11 has a circular cross section and occupies about 1/5 of the entire length of the gear edge cutting tool 10. A V-shaped groove 11M is formed on the entire circumference in the center of the small diameter portion 11 in the axial direction.

  The large diameter portion 12 has a circular cross section and occupies more than half of the entire length of the gear edge cutting tool 10. In addition, positioning planes 12H and 12H are formed at two locations 180 degrees apart in the circumferential direction at the base end of the large diameter portion 12.

  As shown in FIG. 4, the band plate portion 13 has main planes 13M and 13M parallel to the positioning planes 12H and 12H, and the plate thickness of the band plate portion 13 is approximately 1/5 of the diameter of the large diameter portion 12. It has become. As shown in FIG. 3, one side surface 13 </ b> S in the width direction of the band plate portion 13 has an arc surface that is continuous with the outer peripheral surface of the large diameter portion 12. On the other hand, the other side surface 13T of the band plate portion 13 is a flat surface and is disposed at a position closer to the center of the large diameter portion 12 than the one side surface 13S. A curved surface 12K that is continuous with the side surface 13T and a curved surface 12R that is continuous with the main plane 13M as shown in FIG. 4 are formed at the boundary between the band plate portion 13 and the large diameter portion 12.

  As shown in FIG. 6, when viewed from the axial direction of the shaft portion 14, the tip plate portion 15 has a symmetrical shape. Further, the first side surface 15A at one end in the direction in which the symmetry center line J1 extends among the side surfaces of the tip plate portion 15 forms an arc surface that is flush with the outer peripheral surface of the large diameter portion 12 and the side surface 13S (see FIG. 3). The second side surface 15B on the other end side is a plane orthogonal to the symmetry center line J1. Further, the third side surfaces 16 and 16 are provided in a pair symmetrically between the first side surface 15A and the second side surface 15B, and the end portions of the third side surfaces 16 and 16 on the second side surface 15B side are provided. Are removed to form fourth side surfaces 17 and 17. A pair of first cutting blade portions 21 and 21 having a first main plane 15X (see FIG. 5) on the shaft portion 14 side of the tip plate portion 15 as a rake face and a third side face 16 as a flank face are provided. In addition, a pair of second cutting blade portions 31, 31 having a first main plane 15X as a rake face and a fourth side face 17 as a flank are provided.

  As shown in FIG. 5, a part of the fourth side surface 17 is an excessive cutting surface 17A that does not intersect the first main plane 15X, and the portion where the excessive cutting surface 17A is formed is Since the third side surface 16 remaining on the first main plane 15X side from the excessive cutting surface 17A intersects the first main plane 15X, the first cutting edge 21 is formed instead of the second cutting edge 31.

  Specifically, as shown in FIG. 5, the first main plane 15 </ b> X and the second main plane 15 </ b> Y on the back side of the tip plate portion 15 are parallel to each other and orthogonal to the central axis of the large-diameter portion 12 (see FIG. 3). doing. The boundary portion between the strip plate portion 13 and the tip plate portion 15 includes a curved surface 13K continuous with the first main plane 15X and the side surface 13T of the strip plate portion 13, and the first main plane 15X and the strip plate portion 13. A curved surface 13R that is continuous with the main plane 13M is formed.

  As shown in FIG. 7A, between the first main plane 15X and the second main plane 15Y, the entire third side surface 16 has an arc shape, and one end portion of the third side surface 16 is the second main plane. While continuing to 15Y, the other end of the third side surface 16 is orthogonal to the first main plane 15X. That is, the contact surface S1 of the third side surface 16 that intersects the first main plane 15X intersects the first main plane 15X at approximately 90 degrees (see α in FIG. 7A). Then, as shown in FIG. 7B, when the contact surface S1 is tilted toward the third side surface 16 with the intersection with the first main plane 15X as the center, the contact surface S1 cuts off the tip plate portion 15. The portion is cut away to form the fourth side surface 17. As a result, the crossing angle β of the flank (fourth side surface 17) with respect to the rake face (first main plane 15X) of the second cutting edge 31 is the rake face (first main plane 15X) of the first cutting edge 21. Is smaller than the crossing angle α of the flank (third side surface 16).

  As shown in FIG. 7A, the ridge line formed by the intersection of the first main plane 15 </ b> X and the third side surface 16 forms a first blade 22 as a blade of the first cutting blade portion 21. As shown in FIG. 6, the left and right first blades 22 and 22 are linear so that they approach each other as they approach the second side surface 15B from both ends of the first side surface 15A to the position near the second side surface 15B. It extends to. Further, as shown in FIG. 7B, the ridge line formed by the intersection of the first main plane 15 </ b> X and the fourth side surface 17 forms a second blade line 32 as a blade line of the second cutting blade part 31. Yes. As shown in FIG. 6, the left and right second blade streaks 32, 32 are continuous from the ends of the first blade streaks 22, 22, and toward the symmetrical centerline J <b> 1 as the distance from the first blade streaks 22, 22 increases. It extends in an approaching arc shape, and extends straight from the middle to the second side surface 15B.

  FIG. 8 shows an example of a tool holder 40 to which the gear edge cutting tool 10 is attached. The tool holder 40 has the same basic structure as that disclosed in Japanese Patent No. 5550187, and includes a movable member 41 and a support member 42 that supports the movable member 41 so as to be tiltable in an arbitrary direction. The movable member 41 has a columnar shape, and has a tool holding hole 41A at the center, and the front end portion is vertically connected to a pair of stop walls 41B (only one stop wall 41B is shown in FIG. 8). It is divided. Further, a screw hole 41 </ b> C communicating with the movable member 41 from the side is formed in an intermediate portion in the axial direction of the movable member 41. Then, the small-diameter portion 11 of the gear edge cutting tool 10 is inserted into the tool holding hole 41A, and the screw hole with the positioning planes 12H and 12H of the gear edge cutting tool 10 adjacent to the inner surfaces of the pair of stop walls 41B. The screw 41N fastened to 41C is engaged with the V-shaped groove 11M of the small diameter portion 11, and the gear edge cutting tool 10 is fixed to the movable member 41.

  A substantially regular polygonal (for example, regular hexagonal) flange 41F protrudes from the side surface of the movable member 41, and the side surface of the flange 41F forms an arc shape between both front and back surfaces of the flange 41F. A flange 41 </ b> F is fitted into a regular hexagonal support hole 42 </ b> A formed in the support member 42. Further, the positioning contact wall 42B protrudes inward from the front end portion of the support hole 42A, and is built in the support member 42 so that the front surface of the flange 41F is in contact with the positioning contact wall 42B. The compression coil spring 43 urges the flange 41F forward. As a result, the gear edge cutting tool 10 together with the movable member 41 tilts in an arbitrary direction with respect to the support member 42 in a state where the rotation around the central axis thereof is restricted, and the flange 41F moves to the positioning contact wall 42B. It is urged so as to be in the origin posture in contact with the surface.

  FIG. 9 shows a rotating jig 44 according to the present invention. The rotating jig 44 has a rotating disc 44B that is rotated by receiving the power of a motor (not shown). Further, for example, three locking claws 44A protrude from a position at which the outer edge portion of the end surface of the turntable 44B is equally divided, and are supported so as to be tiltable in the radial direction of the turntable 44B. The locking claw 44A group is urged to move toward the center of the turntable 44B by air (not shown), and is provided between the turntable 44B and a base portion 44D that rotatably supports the turntable 44B. When the pressure of compressed air is received through the rotary joint that does not, it moves to the side away from the center of the turntable 44B. Accordingly, when the locking claw 44A group is inserted inside the gear 90, the gear side surface 90S is brought into contact with the end surface of the rotating disk 44B, and the locking claw 44A group is moved outward, the gear 90 is moved to the rotating disk 44B. And is fixed so as to be integrally rotatable. In the present embodiment, the rotating jig 44 and the tool holder 40 (see FIG. 8) constitute a gear edge cutting device 45 according to the present invention.

  The description about the structure of the gear edge cutting tool 10 and the gear edge cutting apparatus 45 of this embodiment is above. Next, the effects of the gear edge cutting tool 10 and the gear edge cutting device 45 will be described. The tool holder 40 (see FIG. 8) is set so that the gear edge cutting tool 10 is arranged as follows with respect to the gear 90 attached to the gear edge cutting device 45. That is, as shown in FIG. 10B, the symmetrical center line J1 in the tip plate portion 15 of the gear edge cutting tool 10 is arranged in parallel with the gear side surface 90S of the gear 90, and from the symmetrical center line J1 in the tip plate portion 15. As shown in FIG. 10B, the second blade 32, which is the blade of the second cutting blade 31 on one side, is brought into contact with the bottom edge 92A of the gear 90 as shown in FIG. 10A. The first cutting blade portion 21 on one side is placed between the adjacent teeth 91, 91. Further, as shown in FIG. 9, the shaft portion 14 of the gear edge cutting tool 10 is inclined by a predetermined angle (γ degrees in FIG. 9) with respect to the gear side surface 90 </ b> S, and the second blade muscles 32 are moved in the tooth height direction H <b> 3 of the teeth 91. When viewed from (see FIG. 2), the bottom edge 92A of the gear 90 is crossed obliquely.

  Then, as shown by the arrow in FIG. 10A, the gear 90 is driven to rotate in one direction by the gear edge cutting device 45, so that the tip plate portion 15 has the side edge 92B of the tooth 91 facing the first main plane 15X side. The gear edge cutting tool 10 is moved relative to the tooth 91 in one of the tooth thickness directions H <b> 1 so as to approach to the tooth 91. Then, the second cutting blade portion 31 moves while cutting the bottom edge 92A, reaches the corner edge 92D, and also cuts the corner edge 92D. Here, when the second cutting blade part 31 moves the corner edge 92D, the contact position of the second cutting blade part 31 with the gear 90 moves to the first cutting blade part 21 side in the second cutting blade part 31. Accordingly, the tip plate portion 15 gradually slips out from between the adjacent teeth 91, 91 in the tooth width direction H2 (see FIG. 10B). Then, the contact position of the gear edge cutting tool 10 with the gear 90 moves from the second cutting blade portion 31 to the first cutting blade portion 21, and the corner edge 92 </ b> D is cut off by the first cutting blade portion 21. Eventually, the first cutting blade portion 21 reaches the side edge 92B, and as shown in FIG. 11A, the first cutting blade 22 that is the blade of the first cutting blade portion 21 as viewed from the tooth width direction H2 is the side edge. As shown in FIG. 11B, the first blade 22 that is the blade of the first cutting blade portion 21 when viewed from the tooth thickness direction H1 is side edge 92B. It becomes the state which crossed diagonally.

  When the gear edge resection tool 10 further moves relative to the tooth 91 in one of the tooth thickness directions, the first cutting blade 21 is adjacent to the side edge 92B while resecting the side edge 92B from the tooth bottom side toward the tooth tip side. The gear edge resection tool 10 moves between the adjacent teeth 91 and 91, and gradually moves out in the tooth width direction H2 (see FIGS. 2 and 11B) between the adjacent teeth 91 and 91. . Then, by rotating the gear 90 one or several times, the bottom edge 92A on one end side in the tooth width direction H2 and the one corner edge 92D and the side edge 92B of each tooth 91 of the gear 90 are cut off.

  Next, the gear edge cutting tool 10 indicated by the solid line in FIG. 9 is positioned symmetrically with respect to a reference plane that includes the central axis of the gear 90 and is parallel to the symmetry center line J1 of the tip plate portion 15 of the gear edge cutting tool 10. (That is, moved to the position of the gear edge cutting tool 10 of the two-dot chain line in FIG. 9), the first cutting blade portion 21 on the side not used last time is placed between the adjacent teeth 91, 91. The gear 90 is rotated in the direction opposite to the previous time by placing the second cutting edge 32 of the second cutting blade portion 31 in contact with the bottom edge 92A. Alternatively, the first cutting blade portion 21 on the side that has not been used last time is adjacent to the reference plane that includes the central axis of the gear 90 and that is orthogonal to the symmetry center line J1 of the tip plate portion 15 of the gear edge cutting tool 10. 91, 91, and the second blade 32 of the second cutting blade 31 is brought into contact with the bottom edge 92A to rotate the gear 90 in the opposite direction to the previous time. Thus, the other corner edge 92D and side edge 92B on one end side in the tooth width direction H2 of each tooth 91 of the gear 90 are cut off. That is, the side edge 92B, the corner edge 92D, and the bottom edge 92A on one end side in the tooth width direction H2 of the tooth 91 are cut off by the gear edge cutting tool 10. By performing the same processing, the gear edge cutting tool 10 can cut all the side edges 92B, corner edges 92D, and bottom edges 92A on the other end side of the tooth 91 in the tooth width direction H2.

  Thus, according to the gear edge cutting tool 10 of the present embodiment, the side edge 92B and the bottom edge 92A of each tooth 91 of the gear 90 can be obtained by simply moving the tooth 90 of the gear 90 relative to the tooth thickness direction. Both of them can be excised efficiently. Further, from the intersection angle α (see FIG. 7A) between the rake face and the flank face of the first cutting blade portion 21 (see FIG. 7A), the intersection angle β between the rake face and the flank face of the second cutting blade portion 31 (see FIG. 7 ( By reducing B), the balance between the side edge 92B, the bottom edge 92A, and the amount of excision can be made suitable.

  In addition, the gear edge cutting tool 10 of this embodiment mentioned above is provided with the 1st cutting blade part 21 and the 2nd cutting blade part 31 symmetrically, and both the case where the gear 90 is rotated to one side and the other is rotated. However, the gear edge cutting tool 10 may be prepared separately for the case where the gear 90 is rotated in one direction and for the case where the gear 90 is rotated in the other direction. Moreover, in the gear edge cutting tool 10 of this embodiment, although symmetrical centerline J1 was arrange | positioned and used in parallel with the gear side surface 90S of the gear 90, you may arrange | position and use non-parallel.

[Second Embodiment]
FIG. 12 shows the tip plate portion 15 of the gear edge cutting tool 10V according to the second embodiment of the present invention. As shown in the figure, in the gear edge cutting tool 10 </ b> V, the entire second blade line 32 has an arc shape continuous to the first blade line 22. In addition, in this embodiment, regarding the same site | part as the said 1st Embodiment, the same code | symbol is attached | subjected to drawing and the overlapping description is abbreviate | omitted. The same applies to the following embodiments.

[Third Embodiment]
13A and 13B show a gear edge cutting tool 10W according to a third embodiment of the present invention. This gear edge cutting tool 10 </ b> W has a structure in which a pair of first cutting blade portions 21, 21 are connected by one second cutting blade portion 31. Specifically, both end portions of the second blade streak 32 have an arc shape continuous to each end portion of the first blade streaks 22 and 22, and an intermediate portion of the second blade streak 32 is connected to the symmetry center line J1. It extends in an orthogonal straight line. Similarly to the first embodiment, a part of the third side surface 16 is cut flat to form a fourth side surface 17B, and the fourth side surface 17B is a flank of the second cutting blade portion 31. . In this gear edge cutting tool 10W, instead of the band plate portion 13 (see FIG. 3) of the first embodiment, a small diameter portion 13W having a circular cross section is provided on the distal end side of the shaft portion 14, and a distal end is provided at the tip. A plate portion 15 is provided.

[Fourth Embodiment]
14 (A) and 14 (B) show a gear edge cutting tool 10X according to a fourth embodiment of the present invention. The gear edge cutting tool 10X includes an end portion on the first side surface 15A (see FIG. 6) side of the tip plate portion 15 of the gear edge cutting tool 10 of the first embodiment, and a tip plate portion of the gear edge cutting tool 10W of the third embodiment. 15 is joined to the end portion on the first side surface 15A (see FIG. 13B) side. According to this structure, it is possible to appropriately cut the bottom edge 92A by selecting the second cutting blade portion 31.

[Fifth Embodiment]
The gear edge cutting tool 10Z of this embodiment is shown in FIG. This gear edge cutting tool 10Z is obtained by deforming the gear edge cutting tool 10W of the third embodiment, and gradually moves from the position near the first side surface 15A in the tip plate portion 15 toward the end portion on the first side surface 15A side. And the rake face of the entire first cutting blade portion 21Z is an involute curved surface corresponding to the meshing surface 93B of the gear 90, which is the target workpiece. Specifically, the rake face of the first cutting blade portion 21Z has a radius of curvature that gradually increases from the side edge 92B of the tooth 91 toward the side that cuts the tooth tip side from the side that cuts the tooth bottom side. It is a curved involute curved surface. Also with this configuration, the side edge 92B of the tooth 91 of the involute gear can be efficiently cut by the first cutting blade portion 21Z.

[Sixth Embodiment]
The gear edge cutting tool 10U of this embodiment is shown in FIG. The gear edge cutting tool 10U is obtained by deforming the gear edge cutting tool 10W of the third embodiment. When the tip plate portion 15 is viewed from the axial direction of the gear edge cutting tool 10U, the scooping of the first cutting blade portion 21 is performed. The third side surface 16 that is a surface is curved in a concave shape, and the first blade line 22U is curved in a concave shape. More specifically, the third side surface 16 and the first blade line 22U are curved so as to draw an involute curve. Also with this configuration, the side edge 92B of the tooth 91 of the involute gear can be efficiently cut by the first cutting blade portion 21U. In the gear edge cutting tool 10U of the seventh embodiment, the rake face of the first cutting blade may be curved in a concave shape as described above.

[Seventh Embodiment]
The gear edge cutting tool 10T of this embodiment is shown in FIG. This gear edge cutting tool 10T is a modification of the gear edge cutting tool 10W of the third embodiment, and is viewed from the axial direction of the gear edge cutting tool 10T, and the first side surface 15A of the first cutting blade portions 21T and 21T. The side end portion is projected to both sides of the tip plate portion 15 so as to have a projecting portion 15N, 15N. And each 1st cutting blade part 21T is the main 1st cutting blade part of the 2nd cutting blade part 31 side from the sub 1st cutting blade part 21D formed in the overhang | projection part 15N, and the sub 1st cutting blade part 21D. 21C, and the first cutting blade 22T has a bent shape in which the sub first cutting blade 22D and the main first cutting blade 22C intersect each other. According to the gear edge cutting tool 10T, as shown in FIG. 17, it is possible to cope with a gear 90 having a shape in which the tooth width of the tip portion of the tooth 91 is gradually narrowed. That is, the tip side edge 92G formed by the intersection of the inclined portion 90U on the tip side of the tooth 91 and the meshing surface 93B in the gear side surface 90S can be removed by the sub first cutting blade portion 21D of the gear edge cutting tool 10T. .

[Eighth Embodiment]
The gear edge cutting device 45V of this embodiment is shown in FIGS. 18 and 19 and includes a robot 50 that holds the tool holder 40 described in the first embodiment. The gear edge cutting tool 10 held by the tool holder 40 is positioned by the teaching playback of the robot 50 with respect to the gear 90 held by the rotating jig 44.

  Specifically, the robot 50 has an XY table 51 as a “first drive mechanism” according to the present invention, and the XY table 51 is fixed to a support member (not shown) that is the same as the base portion 44D of the rotating jig 44. The first base portion 51A is provided. Then, the first movable table 51B linearly moves in the first horizontal direction H5 (see FIG. 19) perpendicular to the paper surface of FIG. 18 with respect to the first base portion 51A, and the second movable table 51B is second in relation to the first movable table 51B. The movable table 51D moves linearly in a second horizontal direction H4 orthogonal to the first horizontal direction H5. The rotation axis of the rotation jig 44 is parallel to the first horizontal direction H5 (see FIG. 19). Further, the XY table 51 is provided with two servo motors (not shown) and two ball screw mechanisms (not shown) that convert their rotational outputs into linear motions, and thereby the “first output unit” according to the present invention. The second movable table 51D is positioned and controlled at an arbitrary position on a horizontal two-dimensional plane.

  The second movable table 51D is equipped with a γ-axis rotation mechanism 52 as a “second drive mechanism” according to the present invention. The γ-axis rotation mechanism 52 is provided with a base portion 52A and a reduction gear 52G fixed on the second movable table 51D. The speed reducer 52G includes, for example, an input part and an output part on the same axis on the front and back sides, and a common rotation axis thereof is parallel to the second horizontal direction H4 described above. A servo motor 52M is connected to the input portion of the speed reducer 52G, and a rotating sleeve 52S as a “second output rotating portion” of the present invention is attached to the output portion of the speed reducer 52G. The rotating sleeve 52S has a cylindrical shape extending in the second horizontal direction H4. Further, the intermediate portion of the rotating sleeve 52S is rotatably and linearly supported by the bearing portion 52D of the second upright support portion 52C that stands up from the first movable table 51B.

  A Z-axis linear motion mechanism 53 as a “third drive mechanism” of the present invention is attached to the tip of the rotary sleeve 52S. The Z-axis linear motion mechanism 53 has a base portion 53A attached to the tip of the rotary sleeve 52S. The base portion 53A has, for example, a casing structure extending in the vertical direction, and its planar shape is a rectangle that is long in the first horizontal direction H5.

  As shown in FIG. 19, a ball screw 61 of a ball screw mechanism 60 penetrates vertically at a position near one end in the first horizontal direction H5 in the base portion 53A, and both end portions of the ball screw 61 are provided in the base portion 53A. The bearings 53J and 53J are rotatably supported. Then, the ball screw 61 is rotationally driven by a servo motor 53M attached to the base portion 53A via a relay box 53C.

  A linear motion base 63 as a “third output portion” of the present invention is fixed to the ball nut 62 of the ball screw mechanism 60. The linear motion base 63 extends from the ball nut 62 to the other end side in the first horizontal direction H5, and extends upward from the tip end portion of the cylindrical upper cylindrical portion 63A. The cylindrical lower cylindrical support extends downward. Part 63B. The upper cylindrical portion 63A is inserted into a through hole 53D in the upper portion of the base portion 53A, and the lower cylindrical support portion 63B is supported by a bearing portion 53B provided in the base portion 53A so as to be linearly movable. Thereby, when the ball screw 61 is rotationally driven, the linear motion base 63 moves up and down.

  The linear motion base 63 is attached with a θ-axis rotation mechanism 54 as a “fourth drive mechanism” of the present invention. The θ-axis rotating mechanism 54 has a servo motor 54M attached to the upper end of the cylindrical support 63A, and the output shaft of the servo motor 54M is disposed in the cylindrical support 63A. The rotating shaft 54A is connected to the output shaft of the servo motor 54M so as to be integrally rotatable, extends downward, and protrudes from the lower surface of the base portion 53A. And the tool holder 40 is fixed to the lower end part of the rotating shaft 54A, and the gear edge cutting tool 10 is arrange | positioned on the coaxial of the rotating shaft 54A. Further, the intermediate portion of the θ-axis rotation mechanism 54 is supported by a bearing portion 53F provided in the through hole 53E of the base portion 53A so as to be linearly movable.

  According to the gear edge cutting device 45V of the present embodiment, as described at the beginning, the gear edge cutting tool 10 is positioned by the teaching playback of the robot 50 with respect to the gear 90 held by the rotating jig 44, thereby improving the efficiency. The edge of the gear 90 can be excised well.

[Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various other than the following can be made without departing from the scope of the invention. It can be changed and implemented.

  (1) In each of the above embodiments, the spur gear is exemplified as the target workpiece for edge removal by the gear edge cutting tool. However, the target workpiece is a helical gear (the tooth width direction is inclined with respect to the rotation axis direction). ). Moreover, it is good also considering a rack instead of a gear as the object of the edge removal by a gear edge cutting tool.

  (2) In the first embodiment, in order to reciprocate the tip plate portion 15 having the first and second cutting blade portions 21 and 31 in the tooth width direction of the gear 90, the tip plate portion 15 is at the tip. The shaft portion 14 that is provided and tilted is disposed substantially on the tangent line of the pitch circle of the gear 90 (see FIG. 1), but is not limited thereto, and the shaft portion 14 is, for example, the center of the gear 90. You may arrange | position on the line orthogonal to an axis | shaft. In this case, the projecting piece having the first cutting blade portion 21 extending substantially parallel to the central axis of the shaft portion 14 may be provided at the tip of the shaft portion 14. Moreover, it is good also as a structure which supports the shaft part 14 so that linear movement is possible with respect to a tooth width direction.

  (3) Although the gear edge cutting tool 10 of the fourth embodiment includes two types of second cutting blade portions 31 at both ends, the same type of second cutting as the gear edge cutting tool 10S shown in FIG. The blade portion 31 may be provided at both ends, and the tip plate portion 15 may be axisymmetric in two vertical and horizontal directions. With such a configuration, wear of each first cutting blade portion 21 and second cutting blade portion 31 can be suppressed, and the gear edge cutting tool 10S can be used over a long period of time. When the gear edge cutting tool 10S is attached to the robot 50 as shown in the form, the amount of rotation of the gear edge cutting tool 10S by the θ-axis rotation mechanism 54 can be reduced, and the operation of the robot 50 is simplified.

10, 10S to 10Z Gear edge cutting tool 14 Shaft portion 15 Tip plate portion 21, 21T, 21U, 21Y, 21Z First cutting blade portion 22, 22T, 22U, 22Y First cutting blade 31 Second cutting blade portion 32 Second blade Muscle 40 Tool holder 45, 45V Gear edge cutting device 50 Robot 51 XY table (first drive mechanism)
52 α-axis rotation mechanism (second drive mechanism)
53 Z-axis linear motion mechanism (third drive mechanism)
54 θ-axis rotation mechanism (fourth drive mechanism)
90 Gear
90S Gear side 91 Tooth 92A Bottom edge 92B Side edge 92D Corner edge J1 Symmetry center line

Claims (12)

A first cutting blade portion disposed between adjacent teeth of the gear and addressed by obliquely intersecting a blade edge with a side edge of one tooth; and the first cutting blade portion on the tooth On the other hand, when the relative movement in the tooth thickness direction is performed, the first cutting blade portion gradually cuts the gap between the adjacent teeth in the tooth width direction while cutting the side edge from the root side toward the tooth tip side. In the gear edge cutting tool that comes out,
The first cutting blade portion includes a second cutting blade portion that is continuous with an end portion of the side edge of the side edge, and the second cutting blade that is the cutting blade of the second cutting blade portion is the first cutting blade. A gear edge cutting tool that is connected to a first blade that is a blade of a cutting blade and that gradually extends away from a reference straight line that extends from the first blade as it moves away from the first blade. The rake face of the first cutting blade portion and the rake face of the second cutting blade portion are continuous,
The gear edge cutting tool according to claim 1, wherein the crossing angle between the rake face and the flank of the second cutting blade part is smaller than the crossing angle between the rake face and the flank face of the first cutting blade part.   The gear edge cutting tool according to claim 1 or 2, wherein a rake face of the first cutting blade portion is curved or bent concavely along the first blade line.   The gear edge cutting tool according to claim 3, wherein a rake face of the first cutting blade portion is an involute curved surface.   The gear edge cutting tool according to any one of claims 1 to 4, wherein a flank surface of the first cutting blade portion is curved or bent in a concave shape along the first blade line.   The gear edge cutting tool according to claim 5, wherein the flank of the first cutting blade portion is an involute curved surface. A shaft portion;
A tip plate portion projecting laterally from the tip of the shaft portion, and having the first cutting blade portion and the second cutting blade portion on an outer edge portion;
The inner surface facing the shaft portion side of the tip plate portion forms a rake face of the first cutting blade portion and the second cutting blade portion,
The gear edge cutting tool according to any one of claims 1 to 6, wherein a side surface of the tip plate portion forms a flank surface of the first cutting blade portion and the second cutting blade portion.   The gear edge cutting tool according to claim 7, wherein the tip plate portion has a line-symmetric shape, and has the first cutting blade portion and the second cutting blade portion on both sides of the symmetry center.   As the first blade line approaches the second blade line, the first blade line is inclined so as to approach the symmetry center line, and the inclination angle of the first blade line is determined when the symmetry center line is arranged parallel to the gear side surface. The gear edge cutting tool according to claim 8, wherein the cutting blade portion is set at an angle that is suitably applied to the side edge.   The gear edge cutting tool according to claim 8 or 9, wherein the tip plate portion has a line-symmetric shape in two vertical and horizontal directions. A gear edge cutting tool according to any one of claims 7 to 10,
A rotation jig that holds and rotates the gear as the gear;
A tool holder for holding the shaft portion of the gear edge cutting tool and supporting the gear edge cutting tool so as to be tiltable in a direction parallel to a rotation axis direction of the rotating jig, and biasing the gear edge cutting tool to a fixed tilting posture; Gear edge cutting device. A first drive mechanism having a first output unit capable of positioning control at an arbitrary position on a two-dimensional plane;
A second drive mechanism attached to the first output unit and having a second output unit that rotates about a rotation axis parallel to the two-dimensional plane;
A third drive mechanism attached to the second output unit and having a third output unit that linearly moves in a direction perpendicular to the rotation axis of the second output unit;
A robot having a fourth drive mechanism attached to the third output unit and having a fourth output unit that rotates about a rotation axis parallel to the linear movement direction of the third output unit;
The tool holder is fixed to the fourth output part so that the shaft part of the gear edge cutting tool extends along the rotation axis direction of the fourth output part,
The gear edge cutting device according to claim 11, wherein the rotation jig is arranged so that a rotation axis thereof is parallel to the two-dimensional plane and is orthogonal to a rotation axis of the second output unit.

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