JP5189997B2 - Commutator manufacturing method and manufacturing apparatus - Google Patents

Description

  The present invention relates to a commutator manufacturing method and a manufacturing apparatus, and more particularly to a commutator manufacturing method and a manufacturing apparatus for manufacturing a commutator from a commutator material by cutting an outer peripheral surface of the commutator material with a cutting tool.

  Conventionally, as a commutator manufacturing method and manufacturing apparatus, for example, there is the following (for example, see Patent Document 1). In the example described in Patent Document 1, after the outer peripheral surface of the commutator material is roughly cut, finish cutting is performed to remove burrs generated by the rough cutting, and the commutator is manufactured from the commutator material. ing.

JP 7-163092 A JP 2004-289921 A

  However, when the commutator material is cut to produce the commutator from the commutator material, the commutator material is only moved when the cutting tool is moved relative to the commutator material from one side to the other in the axial direction (during forward movement). If the air cut is performed to return the origin to the origin position when the cutting tool is moved relative to the commutator material from the other side in the axial direction to the other side (when moving in the return path), the cutting tool is rectified. It is useless to move relative to the child material from the other side in the axial direction to one side, and the production efficiency is lowered.

  Moreover, in this kind of commutator manufacturing method and manufacturing apparatus, it is desired that local wear of the cutting tool can be suppressed in order to ensure the life of the cutting tool.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a commutator manufacturing method and a manufacturing apparatus capable of improving production efficiency and suppressing local wear of a cutting tool. And

  In order to solve the above-mentioned problem, the method of manufacturing a commutator according to claim 1, wherein the commutator material can be cut in a first blade surface region in a blade surface formed on the cutting tool. With the relative posture with respect to the commutator material set to the first relative posture, the cutting tool is moved relative to the commutator material in the circumferential direction of the commutator material while the commutator material is axially moved from one side to the other. The commutator in a first step of cutting the outer peripheral surface of the commutator material by the cutting tool by a relative movement to the side and a second blade surface region different from the first blade surface region in the blade surface The relative position of the cutting tool with respect to the commutator material is changed from the first relative position to the second relative position so that the material can be cut, and the cutting tool is moved from the commutator material to the commutator material. While moving relatively in the circumferential direction From the other axial side of the commutator material to one side by relatively moving, and a, a second step of cutting by the cutting tool to the outer peripheral surface of the commutator material.

  According to the method for manufacturing a commutator according to claim 1, when the commutator material is cut to manufacture the commutator from the commutator material, the cutting tool is moved from one side of the commutator material in the axial direction to the other side. In addition to the relative movement (during forward movement), also when the cutting tool is moved relative to the commutator material from the other side in the axial direction to the other side (during backward movement), the outer peripheral surface of the commutator material is removed from the cutting tool. Cut by. Accordingly, it is possible to prevent wasteful movement of the cutting tool relative to the commutator material from the other side in the axial direction to the other side, thereby improving production efficiency.

  According to the commutator manufacturing method of claim 1, the first step and the second step are performed by changing the relative posture of the cutting tool with respect to the commutator material from the first relative posture to the second relative posture. The use area on the blade surface of the cutting tool differs from process to process. Therefore, local wear of the cutting tool can be suppressed.

  The commutator manufacturing method according to claim 2 is the commutator manufacturing method according to claim 1, wherein the cutting tool in which the cutting edge of the blade surface is formed in an arc shape is used in the second step. A relative posture of the cutting tool relative to the commutator material is rotated from the first relative posture to the second relative posture by rotating the cutting tool relative to the commutator material about the center point of the arc shape at the cutting edge. It is a method to change to.

  According to the method for manufacturing a commutator according to claim 2, the first step and the second step are performed by rotating the cutting tool relative to the commutator material around the center point of the arc shape at the cutting edge of the cutting tool. Thus, the use areas on the blade surface of the cutting tool can be made different from each other.

  In order to solve the above-mentioned problem, the commutator manufacturing apparatus according to claim 3 includes a cutting tool having a blade surface for cutting a commutator material, and the commutator material with respect to the commutator material. A circumferential drive means for relatively moving the child material in the circumferential direction; an axial drive means for moving the cutting tool relative to the commutator material in the axial direction of the commutator material; and A relative posture with respect to the commutator material is different from the first blade surface region in the blade surface from the first relative posture in which the commutator material is cut in the first blade surface region in the blade surface. Attitude change drive means for changing to the second relative attitude at which the commutator material is cut in the blade surface region, control means for controlling the circumferential direction drive means, the axial direction drive means, and the attitude change drive means And the control means includes a front In a state where the relative posture of the cutting tool with respect to the commutator material is set to the first relative posture, the cutting tool is moved relative to the commutator material in the circumferential direction of the commutator material. While controlling the direction driving means, the axial driving means is controlled so that the cutting tool is relatively moved from one side to the other side in the axial direction of the commutator material, and the outer peripheral surface of the commutator material is A first step of cutting with a cutting tool, and controlling the posture change driving means so that the relative posture of the cutting tool with respect to the commutator material is changed from the first relative posture to the second relative posture. While the cutting tool is controlled relative to the commutator material in the circumferential direction of the commutator material, the cutting tool is controlled from the other side in the axial direction of the commutator material. Relative to side By controlling the axial drive means as to perform a second step of cutting by the cutting tool to the outer peripheral surface of the commutator material has the structure.

  According to the commutator manufacturing apparatus according to claim 3, when the commutator material is cut and the commutator is manufactured from the commutator material, the cutting tool moves from one side in the axial direction to the other side of the commutator material. When the cutting tool is moved relative to the commutator material from the other side in the axial direction to the other side (during backward movement), the outer peripheral surface of the commutator material Is cut by a cutting tool. Therefore, since it is possible to prevent the cutting tool from being moved relative to the commutator material from the other side in the axial direction to the one side, it is possible to improve the production efficiency.

  According to the commutator manufacturing apparatus of the third aspect, the relative posture of the cutting tool with respect to the commutator material is changed from the first relative posture to the second relative posture. The use area on the blade surface of the cutting tool can be made different between the two steps. Therefore, local wear of the cutting tool can be suppressed.

  The commutator manufacturing apparatus according to claim 4 is the commutator manufacturing apparatus according to claim 3, wherein the cutting tool has a cutting edge formed in an arc shape and an arc shape in the cutting edge. The posture change drive means is configured to rotate the cutting tool relative to the commutator material about the arc-shaped center point at the cutting edge to rotate the cutting tool relative to the commutator material. The relative posture with respect to the commutator material is changed from the first relative posture to the second relative posture.

  According to the commutator manufacturing apparatus of the fourth aspect, the cutting tool is rotated relative to the commutator material around the center point of the arc shape at the cutting edge of the cutting tool, so that the first step and the second step are performed. The use area on the blade surface of the cutting tool can be made different between the processes.

It is a front view which shows the whole structure of the manufacturing apparatus of the commutator which concerns on one Embodiment of this invention. It is a side view which shows the whole structure of the manufacturing apparatus of the commutator which concerns on one Embodiment of this invention. It is a figure which shows the front-end | tip part of the cutting tool shown by FIG. It is a principal part enlarged view of the front-end | tip part of the cutting tool shown by FIG. 3A. It is a figure explaining the manufacturing method of the commutator which concerns on one Embodiment of this invention. It is a figure explaining the manufacturing method of the commutator which concerns on one Embodiment of this invention. It is a figure which shows the modification of the manufacturing method of the commutator which concerns on one Embodiment of this invention. It is a figure which shows the modification of the manufacturing apparatus of the commutator which concerns on one Embodiment of this invention. It is a figure which shows the modification of the manufacturing method of the commutator which concerns on one Embodiment of this invention. It is a figure explaining the manufacturing method of the commutator which concerns on a comparative example. It is a figure explaining the manufacturing method of the commutator which concerns on a comparative example. It is a figure explaining the manufacturing method of the commutator which concerns on a comparative example. It is a figure explaining the manufacturing method of the commutator which concerns on a comparative example.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  A commutator manufacturing apparatus 10 shown in FIGS. 1 and 2 manufactures a commutator of an armature 50 provided in a brushed DC motor, for example, a tool rest 11, a support base 12, and a rotation mechanism. 14, a cutting tool 16 (cutting tool), an input operation unit 18, a circumferential drive motor 20 (circumferential drive means), an axial drive motor 22 (axial drive means), and a radial drive. A motor 24, a tool post driving motor 25 (attitude change driving means), and a control circuit 26 (control means) are included.

  The tool post 11 holds a cutting tool 16. The tool post 11 is configured to be movable in the axial direction and the radial direction of the commutator material 56 with respect to the commutator material 56 (member before the commutator) supported by the support table 12. The angle (relative attitude) with respect to the commutator material 56 is changeable. In addition, the rotation center at the time of changing the angle of the tool rest 11 coincides with the center point (see FIG. 3B) of the circular arc shape at the cutting edge of the blade surface 39 formed on the cutting tool 38 described later.

  The support base 12 includes a pair of support portions 28, and the support portions 28 are configured to rotatably support both axial end portions of the rotary shaft 52 provided in the armature 50. .

  The rotating mechanism 14 includes a driving belt 30, a driving pulley 32, and a plurality of driven pulleys 34A to 34D. The drive belt 30 is looped over a drive pulley 32 and a plurality of driven pulleys 34A to 34D. Of the plurality of driven pulleys 34A to 34D, the pair of driven pulleys 34A and 34B arranged on the armature 50 side is relative to the outer peripheral portion 54A of the core 54 provided in the armature 50 (in this case, the upper end in the vertical direction). It is arranged offset to the rotating shaft 52 side, and a portion of the drive belt 30 between the pair of driven pulleys 34A, 34B is pressed against the core 54. In the rotating mechanism 14, when the driving pulley 32 is rotated, the driving belt 30 is rotated to rotate the entire armature 50 together with the core 54.

  The cutting tool 16 is arranged to face the commutator material 56 in the radial direction, and includes a holder 36 and a cutting tool 38 as shown in FIG. 3A. The cutting tool 38 is configured to have a blade surface 39 (rake surface) for cutting the commutator material 56, and the cutting edge of the blade surface 39 has a center point O as shown in FIG. 3B. It is formed in a circular arc shape with the center.

  The input operation unit 18 includes an operation panel or the like that can input processing conditions such as a feed speed, a feed amount, and a cut amount, and commands for starting and finishing the processing.

  The circumferential drive motor 20 is configured to rotate the drive pulley 32 described above, and the axial drive motor 22 moves the tool post 11 in the axial direction of the commutator material 56 with respect to the commutator material 56. The cutting tool 16 is moved and moved.

  The radial drive motor 24 is configured to move the cutting tool 16 by moving the tool post 11 in the radial direction of the commutator material 56 with respect to the commutator material 56. The motor 25 is configured to change the angle (attitude) of the cutting tool 16 with respect to the commutator material 56 by rotating the tool post 11.

  The control circuit 26 is constituted by an electronic circuit having, for example, a CPU, a ROM, a RAM, and the like, and a program for rough cutting and finishing cutting of the commutator material 56 (that is, the first step and the second step in the present invention). Program) in advance.

  Then, the control circuit 26, based on the machining conditions such as the feed speed, feed amount, and cutting amount input from the input operation unit 18 and the machining start and machining end commands, the circumferential drive motor 20 and the axial direction described above. The drive motor 22, the radial drive motor 24, and the tool post drive motor 25 are controlled, and the commutator material 56 is roughly cut and finished by the cutting tool 16.

  Next, a commutator manufacturing method using the commutator manufacturing apparatus 10 having the above-described configuration will be described.

(First step: rough cutting)
When a machining start command is input to the input operation unit 18, the control circuit 26 controls the axial direction driving motor 22 and the radial direction driving motor 24, and the cutting tool 16 is moved by the arrow (1) in the left diagram of FIG. As shown, the commutator material 56 is moved from the origin position to one side (Z1 side) in the axial direction.

  At this time, the position of the tip of the cutting tool 16 is set in accordance with the cutting amount of the next rough cutting. Further, the angle of the cutting tool 16 with respect to the commutator material 56 is, as shown in the left diagram of FIG. 5, the first blade surface region 39A (region having a central angle θa) on the blade surface 39 formed on the cutting tool 38. Is set to a first angle for cutting the commutator material 56 (corresponding to a first relative posture in the present invention).

  Then, the control circuit 26 controls the circumferential driving motor 20 to rotate the driving pulley 32. As a result, the drive belt 30 is rotated, and the commutator material 56 is rotated together with the armature 50.

  Subsequently, the control circuit 26 controls the axial drive motor 22 while rotating the commutator material 56, and the cutting tool 16 is moved to the commutator material 56 as indicated by an arrow (2) in the left diagram of FIG. 4. Move from one axial side (Z1 side) to the other side (riser side; Z2 side).

  As a result, as shown in the left diagram of FIG. 5, the commutator material 56 is cut by the first blade surface region 39 </ b> A of the blade surface 39 formed on the cutting tool 38, and the outer peripheral surface of the commutator material 56 is axial. Rough cutting is performed from one side to the other side. The feed during rough cutting is set to fa [mm / rev].

(Second process: finish cutting)
Subsequently, the control circuit 26 controls the tool post driving motor 25 to rotate the cutting tool 16 by θx as shown by an arrow (A) in FIG. The angle with respect to the material 56 is changed.

  That is, the angle of the cutting tool 16 with respect to the commutator material 56 is changed from the first angle shown in the left diagram of FIG. 5 to the second angle shown in the diagram of FIG. 5 (corresponding to the second relative posture in the present invention). To change. As will be described later, this second angle is rectified in a second blade surface region 39B (region having a central angle θb) different from the first blade surface region 39A in the blade surface 39 formed on the cutting tool 38. This is the angle at which the child material 56 can be cut (see the right figure in FIG. 5).

  Thereafter, the control circuit 26 controls the radial drive motor 24, and the cutting tool 16 is moved from the above position by the amount of cutting for the next finish cutting as shown by the arrow (B) in FIG. The commutator material 56 is moved inward in the radial direction.

  Subsequently, the control circuit 26 controls the axial driving motor 22 while rotating the commutator material 56, and the other side in the axial direction of the commutator material 56 as indicated by an arrow (3) in the right diagram of FIG. 4. Move from the riser side (Z2 side) to one side (Z1 side).

  As a result, as shown in the right diagram of FIG. 5, the commutator material 56 is cut by the second blade surface region 39 </ b> B of the blade surface 39 formed on the cutting tool 38, and the outer peripheral surface of the commutator material 56 is axially Finished cut from one side to the other. The feed at the time of finish cutting is set to fb [mm / rev].

  Subsequently, the control circuit 26 controls the axial direction driving motor 22 and the radial direction driving motor 24 to move the cutting tool 16 in the axial direction of the commutator material 56 as indicated by an arrow (4) in the right diagram of FIG. Return to the home position from one side (Z1 side).

(Deburring process)
And the commutator raw material 56 is conveyed to the deburring process after the above-mentioned cutting process. In this deburring step, the commutator material 56 is deburred and the like remaining in the undercut groove by the deburring device. In the method for manufacturing a commutator according to an embodiment of the present invention, a commutator is manufactured from the commutator material 56 in the manner described above.

  In the present embodiment, the operation performed by the control circuit 26 in the first step described above corresponds to the first step in the present invention, and the operation performed by the control circuit 26 in the second step described above is the second step in the present invention. It corresponds to a step.

  Next, the effect of the commutator manufacturing method according to the embodiment of the present invention described above will be described.

  Here, in order to clarify the effect of the method for manufacturing a commutator according to an embodiment of the present invention, the method for manufacturing the commutator according to the first and second comparative examples will be described with reference to FIGS. Will be described.

  In the commutator manufacturing method according to the first comparative example shown in FIGS. 9 and 10, separate commutator manufacturing apparatuses 110 are used for rough cutting and finish cutting, respectively. That is, the commutator manufacturing apparatus 110 shown in FIG. 8 is for rough cutting, and the commutator manufacturing apparatus 110 shown in FIG. 9 is for finish cutting.

  In the commutator manufacturing apparatus 110 according to this comparative example, commutators are manufactured by the following method.

(First step: rough cutting)
That is, in the commutator manufacturing apparatus 110 for rough cutting shown in FIG. 9, the cutting tool 116 is axially one side (Z1) of the commutator material 56 from the origin position as indicated by the arrow (1) in FIG. Side). Then, the commutator material 56 is rotated together with the armature 50.

  Subsequently, while rotating the commutator material 56, the cutting tool 116 is rotated from one side (Z1 side) in the axial direction of the commutator material 56 to the other side (riser side; Z2 side) as shown by an arrow (2) in FIG. ). Thereby, the outer peripheral surface of the commutator material 56 is rough cut from one side in the axial direction to the other side.

  Subsequently, the cutting tool 116 is retracted from the end position in the first step to the radially outer side of the commutator material 56 as indicated by an arrow (3) in FIG. Thereafter, the cutting tool 116 is returned from the retracted position to the origin position as indicated by an arrow (4) in FIG.

  Then, the commutator material 56 is conveyed to the commutator manufacturing apparatus 110 for finish cutting shown in FIG. 10 after the above-described rough cutting. In addition, when using the commutator manufacturing apparatus 110 common to rough cutting and finishing cutting, the cutting tool is changed from rough cutting to finishing cutting, or in accordance with the next finishing cutting. It is necessary to incline the cutting tool to the optimum angle.

(Second process: finish cutting)
Subsequently, in the commutator manufacturing apparatus 110 for finish cutting shown in FIG. 10, the cutting tool 116 is positioned on one side in the axial direction of the commutator material 56 from the origin position as indicated by an arrow (5) in FIG. 10. (Z1 side) again. Then, the commutator material 56 is rotated together with the armature 50.

  Then, while rotating the commutator material 56, the cutting tool 116 is moved from one side (Z1 side) in the axial direction of the commutator material 56 to the other side (riser side; Z2 side) as shown by an arrow (6) in FIG. Moved to. Thereby, the outer peripheral surface of the commutator material 56 is finish-cut from the one side in the axial direction to the other side.

  Subsequently, the cutting tool 116 is retracted from the end position in the second step to the radially outer side of the commutator material 56 as indicated by an arrow (7) in FIG. Thereafter, the cutting tool 116 is returned from the retracted position to the origin position as indicated by an arrow (8) in FIG.

(Deburring process)
Subsequently, the commutator material 56 is conveyed to the deburring step after the above-described cutting process. In this deburring step, the commutator material 56 is deburred and the like remaining in the undercut groove by the deburring device. In the commutator manufacturing method according to the comparative example, the commutator is manufactured from the commutator material 56 in the manner described above.

  However, when the commutator material 56 is cut to manufacture the commutator from the commutator material 56 as in the commutator manufacturing method according to the comparative example described above, the cutting tool 116 is axially moved with respect to the commutator material 56. Only when the relative movement from one side (Z1 side) to the other side (Z2 side) (during forward movement) is performed, the outer peripheral surface of the commutator material 56 is cut, and the cutting tool 116 is moved to the other side in the axial direction with respect to the commutator material 56 ( When the air cut for returning to the origin position is performed when the relative movement from the Z2 side to the one side (Z1 side) (return movement) is performed, the cutting tool 116 is axially opposite to the commutator material 56 (Z2). Side) from one side to the other side (Z1 side) is useless, and production efficiency is reduced.

  In contrast, according to the method for manufacturing a commutator according to an embodiment of the present invention, as shown in FIG. 4, when the commutator material 56 is cut and the commutator is manufactured from the commutator material 56, In addition to when the cutting tool 16 is moved relative to the commutator material 56 in the axial direction from one side (Z1 side) to the other side (Z2 side) (during forward movement), the cutting tool 16 is axially moved relative to the commutator material 56. The outer peripheral surface of the commutator material 56 is also cut with the cutting tool 16 when the relative movement is made from the other side (Z2 side) in the direction to the one side (Z1 side) (when the return path is moved). Therefore, it is possible to prevent wasteful movement of the cutting tool 16 relative to the commutator material 56 from the other axial side (Z2 side) to the one side (Z1 side), thereby improving production efficiency. be able to.

  Moreover, according to the method for manufacturing a commutator according to an embodiment of the present invention, after the outer peripheral surface of the commutator material 56 is roughly cut by the cutting tool 16 in the first step, the outer periphery of the commutator material 56 in the second step. Since the surface is finish-cut with the cutting tool 16, the quality of the commutator finish (for example, roundness, level difference between segments, surface roughness of the outer peripheral surface, complete removal of burrs, etc., while improving production efficiency) Quality).

  On the other hand, in the method for manufacturing a commutator according to the second comparative example shown in FIGS. 11 and 12, the cutting is performed after the completion of the first step with respect to the method for manufacturing a commutator according to the embodiment of the present invention described above. The change of the angle of the tool 16 with respect to the commutator material 56 is omitted.

  However, in this case, as shown in FIG. 12, the first blade face region 39C (region having a central angle θc) for cutting the commutator material 56 in the first step and the commutator material 56 in the second step. There is an overlapping blade surface region 39X (region having a central angle θx) with the second blade surface region 39D (region having a central angle θd). Accordingly, local abrasion occurs in the cutting tool 16 in the blade surface region 39X.

  On the other hand, according to the commutator manufacturing method according to the embodiment of the present invention, as shown in FIGS. 4 and 5, the cutting tool 16 is rotated by θx, and the commutator material of the cutting tool 16 is rotated. By changing the angle with respect to 56, the use area in the blade surface 39 of the cutting tool 16 is made different between the first step and the second step. Therefore, local wear of the cutting tool 16 can be suppressed.

  As mentioned above, although one Embodiment of this invention was described, this invention is not limited above, Of course, it can change and implement variously within the range which does not deviate from the main point. .

  For example, in the said embodiment, it was set as the structure by which the angle (attitude | position) with respect to the commutator raw material 56 of the cutting tool 16 is changed by rotating the tool post 11, However, Even if comprised as follows. good.

  That is, as shown in FIG. 6, the angle (attitude) of the cutting tool 16 relative to the commutator material 56 may be changed by rotating the support 12.

  Further, as shown in FIG. 7, the cutting tool 38 is rotatable relative to the holder 36 around the bolt 37, and a cutting tool driving motor 27 that rotates the cutting tool 38 relative to the holder 36 is provided. It may be used. Then, as shown in FIG. 8, the angle (posture) of the cutting bit 38 with respect to the commutator material 56 may be changed by rotating the cutting bit 38 with respect to the holder 36. In the modification shown in FIGS. 7 and 8, the cutting tool driving motor 27 corresponds to the posture change driving means in the present invention, and the cutting tool 38 corresponds to the cutting tool in the present invention.

  In the above embodiment, the angle of the cutting tool 16 with respect to the commutator material 56 is changed after the rough cutting of the commutator material 56 and before the finish cutting. The angle of the tool 16 with respect to the commutator material 56 may be changed.

  In the above embodiment, the cutting tool 16 is moved in the circumferential direction of the commutator material 56 with respect to the commutator material 56 by using the rotation mechanism 14 and the circumferential drive motor 20. Means may be used to move at least one of the cutting tool 16 and the commutator material 56 such that the cutting tool 16 is moved relative to the commutator material 56 in the circumferential direction of the commutator material 56. .

  Moreover, in the said embodiment, although the cutting tool 16 was moved to the axial direction of the commutator raw material 56 with respect to the commutator raw material 56 using the axial direction drive motor 22, other axial direction drive means were used. Alternatively, at least one of the cutting tool 16 and the commutator material 56 may be moved so that the cutting tool 16 is moved relative to the commutator material 56 in the axial direction of the commutator material 56.

  Moreover, in the said embodiment, although the cutting tool 16 was moved to the radial direction of the commutator raw material 56 with respect to the commutator raw material 56 using the radial direction drive motor 24, other radial direction drive means were used. Alternatively, at least one of the cutting tool 16 and the commutator material 56 may be moved so that the cutting tool 16 is moved relative to the commutator material 56 in the radial direction of the commutator material 56.

DESCRIPTION OF SYMBOLS 10 ... Manufacturing apparatus, 11 ... Turret, 12 ... Support stand, 14 ... Rotation mechanism, 16 ... Cutting tool, 18 ... Input operation part, 20 ... Circumferential drive Motor, 22 ... axial direction drive motor, 24 ... radial direction drive motor, 25 ... tool post drive motor, 26 ... control circuit, 27 ... bite drive motor, 28・ ・ ・ Support part, 30 ... Drive belt, 36 ... Holder, 38 ... Cutting tool, 39 ... Blade surface, 39A ... First blade surface region, 39B ... Second Blade surface area, 50 ... armature, 52 ... rotating shaft, 54 ... core, 56 ... commutator material

Claims (4)

In a state where the relative posture of the cutting tool with respect to the commutator material is set to the first relative posture so that the commutator material can be cut in the first blade surface region of the blade surface formed on the cutting tool. The commutator material is moved relative to the commutator material in the circumferential direction of the commutator material, while the commutator material is relatively moved from one side to the other in the axial direction, and the outer peripheral surface of the commutator material is cut by the cutting tool. The first step,
The relative posture of the cutting tool with respect to the commutator material is changed from the first relative posture so that the commutator material can be cut in a second blade surface region different from the first blade surface region in the blade surface. And the relative movement of the cutting tool relative to the commutator material in the circumferential direction of the commutator material while relatively moving the commutator material from the other side in the axial direction, A second step of cutting the outer peripheral surface of the commutator material with the cutting tool;
A method of manufacturing a commutator comprising: Using the cutting tool in which the cutting edge of the blade surface is formed in an arc shape, the cutting tool is rotated relative to the commutator material around the arc-shaped center point in the cutting edge in the second step. Changing the relative posture of the cutting tool relative to the commutator material from the first relative posture to the second relative posture;
The manufacturing method of the commutator of Claim 1. A cutting tool having a blade surface for cutting the commutator material;
Circumferential driving means for moving the cutting tool relative to the commutator material in the circumferential direction of the commutator material;
Axial driving means for moving the cutting tool relative to the commutator material in the axial direction of the commutator material;
The first blade surface region on the blade surface is the relative posture of the cutting tool relative to the commutator material from the first relative posture of cutting the commutator material on the first blade surface region on the blade surface. Attitude changing drive means for changing to a second relative attitude for cutting the commutator material in a different second blade surface area;
Control means for controlling the circumferential direction drive means, the axial direction drive means, and the posture change drive means;
With
The control means includes
The cutting tool is moved relative to the commutator material in the circumferential direction of the commutator material in a state where the relative posture of the cutting tool with respect to the commutator material is set to the first relative posture. While controlling the circumferential driving means, the axial driving means is controlled so that the cutting tool is relatively moved from one side of the commutator material in the axial direction to the other side, and the outer peripheral surface of the commutator material is adjusted. A first step of cutting with the cutting tool;
The posture change driving means is controlled so that the relative posture of the cutting tool with respect to the commutator material is changed from the first relative posture to the second relative posture, and the cutting tool is applied to the commutator material. While controlling the circumferential drive means so as to be relatively moved in the circumferential direction of the commutator material, the shaft is arranged so that the cutting tool is relatively moved from the other side in the axial direction of the commutator material to one side. A second step of controlling the direction driving means to cut the outer peripheral surface of the commutator material by the cutting tool;
Run the
Commutator manufacturing equipment. The cutting tool is configured such that the cutting edge of the blade surface is formed in an arc shape and is rotatable around a center point of the arc shape in the cutting edge,
The posture change driving means rotates the cutting tool relative to the commutator material about the center point of the arc shape at the cutting edge to change the relative posture of the cutting tool relative to the commutator material to the first relative Changing the posture to the second relative posture,
The commutator manufacturing apparatus according to claim 3.

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