JP2015192479A - coil shaping machine and coil shaping method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coil shaping machine that is able to inhibit a production decrease during coil shaping.SOLUTION: In a manufacturing process for an armature comprising: a core 110 having a plurality of teeth 112; a coil wound around a slot 115 between teeth 112; and a wedge 131 that prevents the coil from jutting out of the slot 115, a coil shaping machine 1 is used for an in-process armature after the coil is wound but the wedge 131 is attached thereto. The coil shaping machine 1 comprises; a clamp part 60 that fixes the in-process armature in a predetermined position; a plurality of pressing claws that press and shapes the coil; and a driving part 50 for moving the pressing claws. The pressing claws simultaneously press and shape the coil at the ends of the teeth 112 in a plurality of areas in the direction of a rotation shaft.

Description

  The present invention relates to armature manufacturing, and more particularly to a coil shaping machine and a coil shaping method for shaping a coil wound around a core.

  Conventionally, an armature in which a wire is wound around a core having a plurality of teeth extending radially with respect to a rotating shaft is known. The wire passes through a slot formed between the teeth of the core and is wound over multiple layers to form a coil. A wedge is attached to the slot in order to prevent the coil from jumping out of the opening on the circumferential surface side of the slot (see, for example, Patent Document 1 below).

  The wedge is inserted and inserted into the slot from the end surface in the rotation axis direction of the core. However, if the wire is wound around the area for attaching the wedge due to winding disturbance or the like, it is difficult to attach the wedge to the slot. It becomes. In particular, if a wire is wound around a region for attaching a wedge in the slot at the end of the core, the attachment of the wedge becomes extremely difficult. Therefore, the coil is shaped before the wedge is inserted. For example, Patent Document 2 described below describes a technique for shaping a coil at the core end by deforming an end surface insulating member installed on the core end surface.

JP-A-11-89201 JP 2014-33568 A

  However, in the above-described technique, the shaping of the coil at the end of the core is performed sequentially in a plurality of shaping locations, so that the previously shaped coil is affected by the subsequent shaping of the coil and has a predetermined shape. May not be maintained. In this case, further shaping is required, and productivity is significantly reduced.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a coil shaping machine and a coil shaping method capable of suppressing a decrease in productivity during coil shaping.

  A coil shaping machine according to the present invention includes a core having a plurality of teeth, a coil wound around a slot between the teeth, and a wedge that is attached to the slot and prevents the coil from jumping out of the slot. A coil shaping machine used for an in-process armature after the coil is wound and before the wedge is mounted in a manufacturing process of the armature provided, and fixing the in-process armature at a predetermined position And a plurality of pressing claws for pressing and shaping the coil, and a moving mechanism for moving the pressing claws, and the pressing claws include end portions in the rotational axis direction of the teeth at a plurality of locations. The coil is pressed and shaped at the same time.

  In the coil shaping machine according to the present invention, the moving mechanism includes a reciprocating drive source, and at least one of the pressing claws can be moved in a direction different from the reciprocating direction of the drive source. it can.

  Moreover, in the coil shaping machine which concerns on this invention, the said press nail | claw can be arrange | positioned in a symmetrical position with respect to the plane which passes along the rotating shaft of the said in-process armature.

  A coil shaping method according to the present invention includes a core having a plurality of teeth, a coil wound around a slot between the teeth, and a wedge that is attached to the slot and prevents the coil from jumping out of the slot. In the armature manufacturing process, a coil shaping method for an in-process armature after winding the coil and before mounting the wedge, wherein a plurality of pressing claws for pressing and shaping the coil are moved by a moving mechanism. The coil is pressed and shaped simultaneously at the ends in the rotational axis direction of the teeth at a plurality of locations.

  ADVANTAGE OF THE INVENTION According to this invention, the coil shaping machine and coil shaping method which can suppress the productivity fall at the time of coil shaping can be provided.

It is a front view of the coil shaping machine which concerns on this embodiment. It is a top view of the coil shaping machine which concerns on this embodiment. It is the figure which expanded the principal part among the AA sectional drawings of FIG. It is the figure which expanded the principal part among the BB sectional views of Drawing 1, Comprising: The state before coil shaping by a press nail is shown. It is the figure which expanded the principal part among BB sectional drawings of FIG. 1, Comprising: The state at the time of the coil shaping by a press nail | claw is shown. It is the figure which expanded the principal part among CC sectional drawings of FIG. It is a figure explaining the armature used as the object of the present invention, and is an armature before wedge wearing, (a) shows a side view and (b) shows DD view. It is a figure explaining the armature used as the object of the present invention, and shows the direction of the axis of rotation of the armature after installing the wedge.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments for carrying out the invention will be described with reference to the drawings. The following embodiments do not limit the invention according to the claims, and all combinations of features described in the embodiments are not necessarily essential to the solution means of the invention.

  FIG. 1 is a front view of a coil shaping machine according to the present embodiment, and FIG. 2 is a plan view of the coil shaping machine according to the present embodiment. FIG. 3 is an enlarged view of the main part of the AA cross-sectional view of FIG. FIG. 4 is an enlarged view of the main part of the BB cross-sectional view of FIG. 1 and shows a state before coil shaping by the pressing claw. FIG. 5 is an enlarged view of the main part of the BB cross-sectional view of FIG. 1 and shows a state at the time of coil shaping by the pressing claw. 6 is an enlarged view of the main part of the CC cross-sectional view of FIG. FIGS. 7A and 7B are diagrams for explaining an armature that is an object of the present invention. FIG. 7A shows an armature before a wedge is mounted. FIG. 7A shows a side view and FIG. 7B shows a DD view. . FIG. 8 is a diagram for explaining an armature that is an object of the present invention, and shows a view in the direction of the rotation axis of the armature after the wedge is mounted. In the following description, “front / rear / left / right / upper / lower” is defined as shown in the figure based on the installation state of the coil shaping machine.

  As shown in FIGS. 1 to 3, the coil shaping machine 1 according to the present embodiment includes a base portion 10 disposed below and a main body portion 20 disposed above the base portion 10. The base portion 10 includes a base plate 11 disposed at the lowermost portion of the coil shaping machine 1, a frame 12 disposed above the base plate 11, and a plurality of stays disposed between the base plate 11 and the frame 12. 13 and these members are connected by a bolt (not shown). The main body portion 20 is disposed on the frame 12.

  The main body 20 fixes the armature 100 to the coil shaping machine 1, a processing unit 30 that shapes the coil of the armature 100, a pair of left and right drive units 50 for driving the pressing member 34 included in the processing unit 30, and the coil shaping machine 1. The clamp part 60 for this is comprised. The armature 100 is in a state after the coil is wound and before the wedge is mounted, and corresponds to the in-process armature of the present invention.

  The processing unit 30 is disposed on the frame 12 at the center in the left-right direction of the coil shaping machine 1 and includes a plate 31 fixed on the frame 12 and a block 32 fixed on the plate 31. Yes. Holes for inserting the armature 100 are formed in the central portions of the frame 12, the plate 31, and the block 32, respectively. The diameter of the hole 32 a formed in the block 32 is set slightly larger than the outer periphery of the armature 100 in order to guide the outer periphery of the armature 100. A slit 32b is formed in a part of the inner peripheral surface of the hole 32a, and a positioning member 33 having a tip portion protruding from the slit 32b toward the center of the hole 32a is fixed to the block 32. The distal end portion of the positioning member 33 is engaged with the opening on the outer peripheral side of the slot of the armature 100, whereby the armature 100 inserted into the hole 32a is positioned around the rotation axis. As shown well in FIG. 3, a predetermined space is formed between the plate 31 and the block 32, and a pressing member 34 having a substantially L shape in cross section is provided on both left and right sides of the armature 100 in this space. It is arranged to be movable. The pressing member 34 is a member that moves in the left-right direction when the driving unit 50 is driven. Stopper bolts 35 that restrict the amount of movement of the pressing member 34 in the direction of the armature 100 by the drive unit 50 by contacting the pressing member 34 are provided on the left and right side surfaces of the block 32. By changing the amount of protrusion of the stopper bolt 35 from the block 32, the position where the pressing member 34 approaches the armature 100, that is, the position during shaping can be adjusted. 1 to 3 show a state in which the pressing member 34 approaches the armature 100 (state during shaping).

  The drive unit 50 is fixed to the air cylinder 51 disposed on the left and right sides of the processing unit 30, the movable plate 52 fixed to the rod tip of the air cylinder 51 and reciprocating in the left-right direction, and the processing plate 30 side of the movable plate 52. The spacer 53 is provided. The aforementioned pressing member 34 is fixed to the processed portion 30 side of the spacer 53. The air cylinder 51 is driven and controlled by an air pressure control unit (not shown). The drive unit 50 corresponds to the moving mechanism of the present invention.

  The clamp unit 60 is fixed to the rear surface of the frame 12 in the center in the left-right direction so that the vertical position can be adjusted, the support block 62 fixed to the upper part of the support plate 61, and the upper surface of the support block 62. The toggle clamp 63 is provided. The toggle clamp 63 includes a lever 64 that is operated by an operator and an arm 66 that swings in the vertical direction when the lever 64 is operated. A cap 65 is fixed to the arm 66, and the arm 65 is attached to the coil shaping machine 1 by pressing the upper end of the shaft portion of the armature 100 set in the coil shaping machine 1 by the operation of the lever 64 by the cap 65. Fix it. At this time, the vertical position of the armature 100 is defined by the lower end of the shaft portion of the armature 100 coming into contact with the contact bolt 14 provided on the base plate 11. The clamp part 60 corresponds to the fixing mechanism of the present invention.

  Next, the armature 100 in this embodiment will be described with reference to FIGS. The armature 100 according to the present embodiment includes an armature core 111 having a plurality of substantially T-shaped teeth 112 extending radially with respect to a rotation axis, and end face insulation attached to both end surfaces of the armature core 111 in the rotation axis direction. Member 120. In the present invention, the armature core 111 with the end face insulating member 120 attached is referred to as a core 110. A region between the teeth 112 becomes a slot 115 around which a wire is wound, and a coil is formed by the wound wire. A plurality of coils crossing between the slots 115 on the end surface in the rotation axis direction of the core 110 are generally referred to as coil ends, and the coil L1 and the coil disposed most outward from the end surface in the rotation axis direction of the core 110 The coil L2 disposed immediately below L1 (on the end surface side in the rotational axis direction of the core 110), the coil L3 disposed directly below the coil L2 (on the end surface side in the rotational axis direction of the core 110), and so on. ing. A wedge 131 is inserted into the slot 115 of the armature after winding the wire from the end surface in the rotation axis direction of the core 110 (see FIG. 8). The armature after the wedge 131 is inserted is varnished to enhance insulation and maintain the shape.

  The winding of the wire is performed by repeating a process of winding a plurality of times between two predetermined slots 115 in a state where tension is applied to the wire by an automatic winding machine. Therefore, the winding position in the slot 115 is likely to move to the outer peripheral side along the teeth 112, and therefore, there may occur a turbulence that separates from the designed winding position to the outer peripheral side. When such a winding disturbance occurs, a wire is wound around a region where the wedge 131 is mounted, so that it becomes difficult to mount the wedge 131 in the slot 115. In particular, if a wire is wound around a region for attaching a wedge in the slot 115 at the end of the core 110, the attachment of the wedge becomes extremely difficult. In the present embodiment, such a problem occurs mostly in the coil L1 and the coil L2.

  Next, in addition to the reference diagrams of FIGS. 4 to 6, a detailed configuration of the processing unit 30 and a method for shaping the portion where the above-described winding disturbance has occurred will be described.

  The processing unit 30 is configured as a bilaterally symmetric structure with respect to a plane passing through the rotation axis of the armature 100. The pressing member 34 of the processing unit 30 has integrated pressing claws 34 a and 34 a for pressing and shaping the coil in the vicinity of the tooth 112 that needs shaping toward the center at the axial end of the core 110. The pressing member 34 has cam surfaces 34b and 34b for pressing and driving separate pressing claws 36 and 36, which will be described later. The separate pressing claws 36, 36 are slidably installed in the guide groove 32c in which the block 32 is formed. The guide groove 32 c is formed to be inclined at a predetermined angle with respect to the left-right direction as the moving direction of the pressing member 34, and the separate pressing claw 36 is pressed by the integrated pressing claw 34 a at the axial end of the core 110. The coil in the vicinity of the tooth 112 that needs to be shaped separately from the position to be shaped is arranged so as to be pressed and shaped toward the center side. A spring 37 for urging the separate pressing claw 36 toward the counter armature 100 is installed in the guide groove 32c. The tip portions of the integrated pressing claw 34a and the separate pressing claw 36 are formed in a substantially R shape so as not to damage the coil during press shaping.

  In the above configuration, when the coil is shaped, first, the armature 100 is set in the coil shaping machine 1 and fixed by the clamp unit 60. At this time, the driving unit 50 is in the state shown in FIG. 4 (the state in which the rod of the air cylinder 51 is retracted), and the integrated pressing claw 34 a and the separate pressing claw 36 are at positions separated from the armature 100. Next, as shown in FIG. 5, the rod of the air cylinder 51 of the drive unit 50 is protruded to move the integral pressing claw 34 a of the pressing member 34 toward the armature 100, and at the same time, the cam surface 34 b of the pressing member 34. Thus, the rear end portion of the separate pressing claw 36 is pressed and driven to move the separate pressing claw 36 toward the armature 100. Due to the movement of the integrated pressing claw 34 a and the separate pressing claw 36 toward the armature 100, the tip of the integrated pressing claw 34 a and the separate pressing claw 36 needs to be shaped at one axial end of the core 110. The coils near the teeth 112 are simultaneously pressed and shaped from the left and right sides at a plurality of locations. In the present embodiment, the coil L1, L1 and the coils L2, L2 that require coil shaping are each configured to be simultaneously pressed and shaped at two locations (total of 8 locations). After the shaping of the coil at one axial end of the core 110 is performed in this way, the rod of the air cylinder 51 is retracted to separate the integral pressing claw 34a and the separate pressing claw 36 from the armature 100. And the fixing of the armature 100 by the clamp part 60 is released. Thereafter, coil shaping of the other axial end portion of the core 110 is performed in the same procedure.

  As described above, in the coil shaping machine 1 according to the present embodiment, a plurality of locations that need to be shaped can be shaped at the same time. Therefore, the previously shaped coil is affected by the subsequent shaping of the coil and is predetermined. It becomes possible to reduce the inability to maintain the shape of the coil, and the coil can be shaped efficiently. Moreover, since the press shaping position by the integral press nail | claw 34a and the separate press nail | claw 36 is performed in the axial direction edge part vicinity of the teeth 112, press shaping can be performed still more efficiently.

  In particular, in the coil shaping machine 1 according to the present embodiment, in the vicinity of the teeth on the one end side and the other end side of the coils (L1, L2), the integral pressing claw 34a and the separate pressing claw 36 shape simultaneously, Work efficiency can be increased.

  Moreover, in the coil shaping machine 1 which concerns on this embodiment, since the moving direction of the separate press nail | claw 36 can be set to a different direction from the movement direction of the integrated press nail | claw 34a, the optimal press shaping direction of a press nail | claw is implement | achieved. be able to.

  In the coil shaping machine 1 according to the present embodiment, the pressing claw (the integrated pressing claw 34a and the separate pressing claw 36) is disposed at a symmetrical position in the left-right direction with respect to the plane passing through the rotation axis of the armature 100, Since the press shaping of the coil is performed simultaneously from both the left and right sides of the armature 100, the coil can be shaped efficiently and the stress generated in the shaft portion of the armature 100 can be canceled out. It is possible to prevent the bending of the shaft portion due to the above.

DESCRIPTION OF SYMBOLS 1 Coil shaping machine, 10 base part, 11 base plate, 12 frame, 13 stay, 14 contact bolt, 20 main-body part, 30 process part, 31 plate, 32 block, 32a hole, 32b slit, 33 positioning member, 34 pressing member , 34a Integrated pressing claw, 34b Cam surface, 32c Guide groove, 35 Stopper bolt, 36 Separate pressing claw, 37 Spring, 50 Drive part, 51 Air cylinder, 52 Movable plate, 53 Spacer, 60 Clamp part, 61 Support plate, 62 support block, 63 toggle clamp, 64 lever, 65 cap, 66 arm, 100 armature, 110 core, 111 armature core, 112 teeth, 115 slot, 120 end face insulating member, 131 wedge

Claims (4)

In a manufacturing process of an armature, comprising: a core having a plurality of teeth; a coil wound around a slot between the teeth; and a wedge that is attached to the slot and prevents the coil from protruding from the slot. A coil shaping machine used for an in-process armature after winding of a coil and before mounting of the wedge,
A fixing mechanism for fixing the in-process armature in a predetermined position;
A plurality of pressing claws for pressing and shaping the coil;
A moving mechanism for moving the pressing claw,
The pressing claw presses and shapes the coil simultaneously at the rotational axis direction ends of the teeth at a plurality of locations.   The coil according to claim 1, wherein the moving mechanism includes a reciprocating drive source, and at least one of the pressing claws moves in a direction different from a reciprocating direction of the drive source. Shaping machine.   3. The coil shaping machine according to claim 1, wherein the pressing claw is disposed at a symmetrical position with respect to a plane passing through a rotation axis of the in-process armature. In a manufacturing process of an armature, comprising: a core having a plurality of teeth; a coil wound around a slot between the teeth; and a wedge that is attached to the slot and prevents the coil from protruding from the slot. A coil shaping method for an in-process armature after winding of the coil and before mounting of the wedge,
A coil shaping method, wherein a plurality of pressing claws for pressing and shaping the coil are moved by a moving mechanism, and the coils are simultaneously pressed and shaped at a plurality of ends of the teeth in the rotation axis direction.

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