Conductor position correction method and conductor position correction device

Abstract

The present invention aims to provide a method and apparatus for correcting the position of a stator conductor, which can accurately correct the position of the tip of a conductor. To address this problem, a conductor position correction apparatus 14 corrects the position of the tip of a conductor leg 261 protruding from the slot in a stator 2 having an annular stator core 21 formed with a plurality of slots and a plurality of conductors arranged within the slots, to a reference position. The conductor position correction apparatus 14 comprises: a conductor holder 4 for holding the tip 263 of the conductor leg 261; a rotation mechanism 5 for supporting the conductor holder 4 and freely rotating the conductor holder 4 about a central axis passing through a base point P to move the tip toward the reference position; and a movement mechanism 6 for freely moving the conductor holder 4 and the rotation mechanism 5 in the vertical direction, circumferential direction, and radial direction of the stator core 21.

Description

Technical Field

[0001] The present invention relates to a conductor position correction method and a conductor position correction device. More specifically, the present invention relates to a conductor position correction method and a conductor position correction device for a stator including an annular stator core and a plurality of conductors arranged in slots formed in the stator core. Background Art

[0002] A rotating electrical machine such as a motor or a generator includes a stator and a rotor. The stator of the rotating electrical machine is manufactured, for example, using the following process.

[0003] First, multiple conductor wires are formed into a roughly U-shape to create multiple coil elements. Next, these coil elements are overlapped and arranged in a circular ring. In this state, the tips of the wires are inserted through slots formed in the annular stator core. Next, a bending device is used to bend the tips of the wires protruding from the slots circumferentially. Adjacent tips are then welded together to create the stator.

[0004] In the stator manufacturing process described above, the positions of the bent tips can be significantly offset, which can sometimes lead to poor bonding. In the stator manufacturing method disclosed in Patent Document 1, a rod-shaped clamp is placed against the bent tips of the wires along the radial direction of the stator core. This bends the tips so that adjacent tips contact each other, thus preventing poor bonding.

[0005] [Prior technical literature]

[0006] (Patent Document)

[0007] Patent Document 1: Japanese Patent Application Laid-Open No. 2016-131453 Summary of the Invention

[0008] [Problems to be solved by the invention]

[0009] However, in the manufacturing method of Patent Document 1, since the clamp abuts the tip of the wire, the wire bends from the base on the slot side. This causes the tip to recover significantly due to springback, making it impossible to accurately correct the tip position. Furthermore, since many wires are densely packed within the slot, bending the wires from the base, as in the manufacturing method of Patent Document 1, could cause not only the wire whose tip position is to be corrected but also adjacent wires to shift position.

[0010] An object of the present invention is to provide a conductor position correction method and a conductor position correction device for a stator, which can correct the tip position of a target conductor with high accuracy.

[0011] [Technical means to solve the problem]

[0012] (1) The conductor position correction method of the present invention is a method for correcting the position of the top end of a conductor leg portion (e.g., conductor leg portion 261, described later) of the conductor protruding from the slot to a reference position in a stator (e.g., stator core 21, described later) having a ring-shaped stator core (e.g., stator core 21, described later) formed with a plurality of slots (e.g., slots 22, described later) and a plurality of conductors (e.g., 26, described later) arranged in the slots, wherein the conductor position correction method is characterized by comprising the steps of: using a holding device (e.g., The wire clamp 4) holds the top end portion (e.g., the top end 263 described later) of the aforementioned wire leg that is closer to the top end side than the bent portion (e.g., the bent portion 264 described later); and, the aforementioned holding device is rotated around a central axis (e.g., the central axis 53a described later) passing through the aforementioned bent portion or a base point (e.g., the base point P described later) closer to the aforementioned top end side than the aforementioned bent portion, to bend the aforementioned wire leg so that the aforementioned top end position moves in a direction close to the aforementioned reference position (e.g., the correction direction described later).

[0013] (2) In this case, the conductor position correction method preferably includes the following steps: based on the correlation between the rotation angle of the holding device centered on the central axis and the movement amount of the top end position taking into account the rebound of the conductor leg after the bending process, the rotation angle required for correcting the top end position to the reference position is calculated in the bending step.

[0014] (3) At this time, it is preferred that the aforementioned holding device has splitting claws (e.g., splitting claws 41, 42 described later) extending along both sides of the aforementioned top portion (e.g., side portions 263a, 263b described later), and in the aforementioned holding step, the aforementioned splitting claws are inserted along the direction of the aforementioned top portion.

[0015] (4) At this time, it is preferred that the aforementioned holding device has a chuck mechanism (for example, the chuck mechanism 44 described later) that changes the claw width of the aforementioned splitting claw. In the aforementioned holding step, after the aforementioned splitting claw is inserted into the aforementioned top end portion with the aforementioned claw width opened, the aforementioned claw width is closed to thereby hold the aforementioned top end portion.

[0016] (5) At this time, when the aforementioned wire leg is observed along the radial direction of the aforementioned stator core, in order from the aforementioned slot side to the aforementioned top end side, it has an inclined portion (for example, the inclined portion 262 described later) that is inclined relative to the axial direction of the aforementioned slot and extends along the circumferential direction of the aforementioned stator core, and the aforementioned top end that is inclined relative to the aforementioned inclined portion and extends along the axial direction of the aforementioned slot. In the aforementioned holding step, the aforementioned holding device is used to clamp the two side portions of the aforementioned top end along the aforementioned circumferential direction to thereby hold the aforementioned top end. In the aforementioned bending step, the aforementioned holding device is rotated around the aforementioned center axis.

[0017] (6) The conductor position correction device of the present invention (e.g., conductor position correction device 14 described later) corrects the top position of the conductor leg portion (e.g., conductor leg portion 261 described later) of the conductor protruding from the slot to a reference position in a stator (e.g., stator core 21 described later) having a ring-shaped stator core (e.g., stator core 21 described later) formed with a plurality of slots and a plurality of conductors (e.g., conductor 26 described later) arranged in the slots, and is characterized in that it includes: a holding device (e.g., a conductor clamping device described later); a device 4) for holding a top portion (e.g., top portion 263 described later) closer to the top end side than a bent portion (e.g., bent portion 264 described later) in the aforementioned wire leg; and a rotating mechanism (e.g., rotating mechanism 5 described later) for supporting the aforementioned holding device and for freely rotating the aforementioned holding device around a central axis (e.g., central axis 53a described later) passing through the aforementioned bent portion or a base point (e.g., base point P described later) closer to the aforementioned top end side than the aforementioned bent portion, so as to move the aforementioned top end position toward a direction close to the aforementioned reference position.

[0018] (7) In this case, it is preferred that the wire position correction device has a rotation angle calculation means (for example, the computer 7 described later), which calculates the rotation angle required to correct the tip position to the reference position based on the correlation between the rotation angle of the holding device centered on the central axis and the movement amount of the tip position taking into account the rebound of the wire leg after bending.

[0019] (8) In this case, it is preferred that the wire position correction device comprises: a support table (e.g., the support table 3 described later) for supporting the stator in a state where the wire leg is facing upward in the vertical direction; and a moving mechanism (e.g., the moving mechanism 6 described later) for enabling the holding device and the rotating mechanism to move freely above the support table along the vertical direction, the circumferential direction of the stator core, and the radial direction of the stator core.

[0020] (9) In this case, it is preferred that the holding device includes splitting claws (e.g., splitting claws 41, 42 described later) extending along both sides of the top end portion (e.g., side portions 263a, 263b described later), and a chuck mechanism (e.g., chuck mechanism 44 described later) that changes the width of the splitting claws.

[0021] (10) At this time, it is preferred that the wire leg, when viewed along the radial direction of the stator core, has, in order from the slot side to the top end side, an inclined portion (for example, the inclined portion 262 described later) inclined relative to the axial direction of the slot and extending along the circumferential direction of the stator core, and the top end portion inclined relative to the inclined portion and extending along the axial direction of the slot, the retaining device retains the top end portion by clamping the two side portions of the top end portion along the circumferential direction (for example, the side portions 263a, 263b described later), and the rotating mechanism rotates the retaining device freely around the center axis.

[0022] (Effects of the Invention)

[0023] (1) In the present invention, a retaining device is used to retain the top end of a conductor leg protruding from a slot in a stator core. The retaining device is rotated about a central axis passing through a bent portion or a base point closer to the top end than the bent portion to bend the conductor leg, thereby moving the top end of the conductor leg toward a reference position. According to the present invention, the top end position can be brought closer to the reference position without shifting or bending the portion of the conductor leg closer to the slot than the base point. Therefore, compared to conventional methods of bending the base of the conductor leg, the recovery amplitude of the top end due to springback after bending can be reduced. This allows the top end position of the conductor leg to be corrected with high precision.

[0024] (2) In the present invention, the rotation angle required to correct the tip position to the reference position is calculated during the bending step based on the correlation between the rotation angle of the holding device about the central axis and the amount of movement of the tip position of the wire leg due to springback after the bending process. This allows the tip position of the wire leg to be corrected with high precision.

[0025] (3) In the present invention, during the step of holding the tip of the wire, a splitting claw extending along both sides of the tip is inserted in the direction of the tip. As the splitting claw is inserted into the tip, it abuts against the tip, thereby preventing the position of the wire leg being held from shifting or bending. This allows the tip of the wire leg to be accurately corrected.

[0026] (4) In the present invention, a device having a chuck mechanism that changes the width of the splitting claw is used as a holding device. Furthermore, in the step of holding the top end, the splitting claw is inserted into the top end with the claw width open, and then the claw width is closed to hold the top end. This prevents the top end of the wire leg from shifting relative to the splitting claw when the splitting claw is rotated about the center axis to bend the wire leg, thereby preventing the wire leg from bending in an unintended portion. This allows the position of the top end of the target wire leg to be corrected with high precision.

[0027] (5) In the bending step performed before the conductor position correction method of the present invention, the conductor protruding from the slot is bent to form a conductor leg having an inclined portion inclined relative to the axial direction of the slot and a tip portion extending along the axial direction of the slot. In the step of holding the tip portion, a holding device is used to clamp both sides of the tip portion along the circumferential direction to hold the tip portion. In the step of bending the conductor leg, the holding device is rotated about the central axis, that is, about an axis perpendicular to the circumferential direction, to bend the conductor leg. This can correct any circumferential misalignment of the tip portion that occurs during the bending process.

[0028] (6) The conductor position correction device of the present invention comprises: a holding device for holding the top end of the conductor leg protruding from the slot of the stator core; and a rotating mechanism for supporting the holding device and freely rotating the holding device about a central axis passing through the bent portion or a base point closer to the top end than the bent portion, so as to move the top end position of the conductor leg toward a direction closer to a reference position. According to the present invention, while the top end of the conductor leg is held by the holding device, the holding device is rotated by the rotating mechanism to bend the conductor leg. This allows the top end position to be closer to the reference position without causing the position of the portion of the conductor leg closer to the slot than the base point to be offset or bent. Therefore, compared with the conventional case of bending the base of the conductor leg, the recovery range of the top end due to springback after the bending process can be made smaller. In this way, the top end position of the conductor leg can be corrected with high precision.

[0029] (7) The wire position correction device of the present invention includes a rotation angle calculation means for calculating the rotation angle required to correct the tip position to a reference position based on the correlation between the rotation angle of the holding device about the central axis and the amount of movement of the tip position in consideration of springback of the wire leg after bending. According to the present invention, the holding device is rotated only by the rotation angle calculated by the rotation angle calculation means, thereby allowing for high-precision correction of the tip position in consideration of springback of the wire leg after bending.

[0030] (8) The wire position correction device of the present invention comprises: a support table that supports the stator in a state where the wire leg is facing upward in the vertical direction; and a moving mechanism that allows the holding device and the rotating mechanism to move freely in the vertical direction, circumferential direction, and radial direction above the support table. According to the present invention, when the top end of the wire leg is held by the holding device, the holding device can be brought close to the top end of the wire leg while fine-tuning the rotation angle of the holding device and the position of the holding device in the vertical direction, circumferential direction, and radial direction. Thereby, when the holding device is brought close to the top end, the holding device abuts the top end, thereby preventing the position of the wire leg as the target from being displaced or bent. Thereby, the top end position of the wire leg as the target can be corrected with high precision.

[0031] (9) In the wire position correction device of the present invention, a device having a splitting claw extending along both sides of the top end portion and a chuck mechanism that changes the claw width of the splitting claw is used as a holding device. In this way, after the splitting claw is inserted into the top end portion with the claw width opened, the claw width is closed, thereby allowing the splitting claw to hold the top end portion. In this way, when the splitting claw is rotated about the center axis to bend the wire leg, the top end portion of the wire leg is prevented from being offset relative to the splitting claw, causing the wire leg to bend in an unintended portion. In this way, the position of the top end of the target wire leg can be corrected with high precision.

[0032] (10) In the bending step performed before correcting the tip position of the conductor, the conductor protruding from the groove is bent to form a conductor leg having an inclined portion inclined relative to the axial direction of the groove and a tip portion extending along the axial direction of the groove. In this regard, a holding device holds the tip portion by clamping both sides of the tip portion along the circumferential direction, and a rotating mechanism rotates the holding device freely about the central axis. According to the present invention, the conductor leg can be bent by rotating the holding device about an axis passing through a base point and orthogonal to the circumferential direction, thereby correcting any poor circumferential alignment of the tip portion that occurs during the bending process. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a diagram showing a portion of a stator manufacturing apparatus equipped with a conductor position correction device according to an embodiment of the present invention.

[0034] Figure 2 This diagram shows the structure of the stator core and coils.

[0035] Figure 3 This figure shows the structure of a stator that has been bent using a bending machine.

[0036] Figure 4 This figure shows an example of an inspection image captured by a wire tip inspection device.

[0037] Figure 5 This is a front view of the wire position correction device.

[0038] Figure 6 It is a plan view of the wire position correction device.

[0039] Figure 7A is a front view of the wire holder.

[0040] Figure 7B is a cross-sectional view of the wire holder.

[0041] Figure 8 This is a diagram showing a state where the tip of a wire leg is held by a wire clamp.

[0042] Figure 9 It is a side view of the rotating mechanism.

[0043] Figure 10A This is a diagram showing an example of an initial image.

[0044] Figure 10B This is a diagram showing an example of a detailed image after a slot number is selected.

[0045] Figure 11 This is a diagram showing the wire leg of the first turn, which is the reference position, and the wire leg whose tip position is shifted clockwise in the circumferential direction relative to the reference position, as viewed from the outside in the radial direction.

[0046] Figure 12 This figure schematically illustrates the process required for moving the tip of the lead leg portion toward the reference position using the dividing claw.

[0047] Figure 13 This is an example of a graph drawn based on the correlation between the rotation angle of the split claw and the movement amount of the tip position in consideration of rebound.

[0048] Figure 14 The present invention is a flow chart illustrating a specific process of a method for correcting a wire position. DETAILED DESCRIPTION

[0049] Hereinafter, a guide wire position correction device according to an embodiment of the present invention and a guide wire position correction method using the guide wire position correction device will be described with reference to the accompanying drawings.

[0050] Figure 1 This diagram illustrates a portion of a stator manufacturing apparatus 1 for use in rotating electrical machines such as motors and generators. The stator manufacturing apparatus 1 includes an alignment and insertion device 11, a bending device 12, a wire tip inspection device 13, a wire position correction device 14, and a splicing device 15. The stator 2, comprising a stator core 21 and coils 25, is manufactured through processing and inspection performed by these devices 11 to 15.

[0051] like Figure 2 As shown, the arrangement and insertion device 11 attaches the previously prepared coil 25 to the previously prepared stator core 21 .

[0052] The stator core 21 is a hollow cylindrical shape extending in the axial direction and is annular in plan view. The stator core 21 is formed by laminating a plurality of annular steel plates. A plurality of slots 22 extending in the axial direction are formed at equal intervals in the circumferential direction on the inner periphery of the stator core 21. In addition, the portion between each slot 22 of the stator core 21 is a tooth portion 23. The coil 25 includes a plurality of coil elements 27 in which a plurality of electrical conductors, i.e., wires 26, are bundled into a roughly U-shape. The tops of the plurality of coil elements 27 are roughly S-shaped in plan view.

[0053] The arrangement and insertion device 11 inserts the tip 263 of each conductive wire 26 into each slot 22 formed in the stator core 21 while arranging the plurality of coil elements 27 in an annular shape and overlapping them in the circumferential direction, and causes the tip 263 to protrude from the slot 22 .

[0054] In addition, Figures 1 to 4 , the case where the number of slots 22 formed in the stator core 21 (hereinafter also referred to as the "number of slots") is set to 48, and the number of wires 26 arranged in one slot 22 (hereinafter also referred to as the "number of turns") is set to 8 is described, but the number of slots or turns of the stator 2 is not limited to this.

[0055] The bending device 12 performs bending processing on a plurality of conductive wires 26 arranged in the slots 22 of the stator 2 processed by the arrangement and insertion device 11. In this bending processing, Figure 3 As shown in FIG. 1 , the portion of the conductor 26 protruding from the slot 22, that is, the conductor leg 261, is bent in the circumferential direction of the stator core 21. More specifically, during the bending process, the conductor leg 261, which is the first turn in the radial direction of the stator core 21, is bent in the circumferential direction to one side (at the Figure 3 The wire legs 261 of the second and third turns are bent to the other side ( Figure 3 In the example of the left side, the conductor legs 261 of the 4th and 5th turns are bent toward one side of the circumference, the conductor legs 261 of the 6th and 7th turns are bent toward the other side of the circumference, and the conductor legs 261 of the 8th turn are bent toward one side of the circumference. In addition, during the bending process, the top end 263 of each conductor leg 261 bent in the above manner is bent toward the opposite side, so that each top end 263 is roughly parallel to the axial direction of the stator core 21. In addition, in Figure 3 In the embodiment, the case where the second and third turns, the fourth and fifth turns, the sixth and seventh turns are bent in the same direction is described, but the bending direction of each turn is not limited to this.

[0056] like Figure 3 As shown, the conductor leg 261 of the stator 2 that has been bent by the bending device 12, when viewed along the radial direction of the stator core 21, has, in order from the slot 22 side to the tip 263 side, an inclined portion 262 that is inclined relative to the axial direction of the slot 22 and extends along the circumferential direction of the stator core 21, a tip 263 that is inclined relative to the inclined portion 262 and extends along the axial direction of the slot 22, and a bent portion 264 that is bent along the circumferential direction and connects these inclined portions 262 and tip 263. Thus, the tip 263 of each conductor 26 of the stator 2 that has been bent as described above can be bent as shown in FIG. Figure 3 As shown, they are arranged in rows along the radial direction.

[0057] The wire tip inspection device 13 inspects whether the tip 263 of each wire 26 is properly positioned on the stator 2 that has been bent by the bending device 12. More specifically, the wire tip inspection device 13 uses a camera (not shown) to capture inspection images of the tip 263 of each wire 26 in the stator 2 along the axial direction of the stator core 21 for each slot 22. Based on the obtained inspection images, the device inspects whether the tip 263 is properly positioned.

[0058] Figure 4 FIG. 1 is a diagram showing an example of an inspection image captured by the wire tip inspection device 13. Figure 4 In FIG, a reference position corresponding to an appropriate position of the center of each top portion 263 is shown by a dotted line. Figure 4 In the figure, the right side is the radially inner side, and the left side is the radially outer side. Based on the obtained inspection image, the wire tip inspection device 13 determines whether the two end surfaces of the tip portion 263 of each turn along the circumferential direction are within the range of a threshold value L1 set on the clockwise side of the circumference and a threshold value L2 set on the counterclockwise side of the circumference, centered on the reference position, thereby inspecting whether each tip portion 263 is properly positioned.

[0059] In the following, the center position of the tip portion 263 of each turn along the circumferential direction is referred to as the tip position. In the following description, the tip position of the first turn, which is located radially innermost, is used as the reference position, but the present invention is not limited to this. The tip position of a turn other than the first turn may be used as the reference position, or a predetermined position may be used as the reference position.

[0060] In addition, Figure 4 In the figure, the top position of the first turn is taken as the reference position, the top positions of the second and third turns are slightly offset counterclockwise relative to the reference position, and the top positions of the fourth, sixth, and eighth turns are slightly offset clockwise relative to the reference position.

[0061] Again Figure 4 , the top position of the fifth turn is significantly offset counterclockwise relative to the reference position, while the top position of the seventh turn is significantly offset clockwise relative to the reference position. More specifically, the position of the counterclockwise end surface of the top portion 263 of the fifth turn exceeds threshold value L2, while the position of the clockwise end surface of the top portion 263 of the seventh turn exceeds threshold value L1. Therefore, the top position of the fifth turn needs to be moved clockwise toward the reference position, while the top position of the seventh turn needs to be moved counterclockwise toward the reference position.

[0062] Based on the obtained inspection image, the wire tip inspection device 13 calculates the direction of deviation of the tip position of each turn from the reference position and the amount of deviation from the reference position of the tip position of each turn. When the tip position deviates clockwise from the reference position, the wire tip inspection device 13 compares the amount of deviation with a threshold value Acw (the distance between the position of the end surface of the tip portion 263 located in the reference position, clockwise, and the threshold value L1). If the deviation does not exceed the threshold value Acw, the wire tip inspection device 13 determines that the tip portion 263 is properly positioned. If the deviation exceeds the threshold value Acw, the wire tip inspection device 13 determines that the tip portion 263 is not properly positioned. Furthermore, when the tip position deviates counterclockwise in the circumferential direction relative to the reference position, the wire tip inspection device 13 compares the amount of deviation with a threshold value Accw (the distance between the position of the end surface of the tip portion 263 in the circumferential direction counterclockwise at the reference position and the threshold value L2). If the deviation does not exceed the threshold value Accw, the tip portion 263 is determined to be positioned appropriately. If the deviation exceeds the threshold value Accw, the tip portion 263 is determined to be not positioned appropriately. Therefore, the deviation calculated in this manner corresponds to the distance required to move the tip position in the circumferential direction in order to position the tip portion 263 appropriately.

[0063] The conductor tip inspection device 13 performs the above-described inspection based on the inspection image for each slot 22. When it determines that the tip portions 263 of all turns in all slots 22 are properly positioned, the inspected stator 2 is sent to the splicing device 15. Furthermore, if any tip portion 263 in any slot 22 is not properly positioned, the conductor tip inspection device 13 sends the inspected stator 2 along with the required data to the conductor position correction device 14. The data sent from the conductor tip inspection device 13 to the conductor position correction device 14 includes, for example, the direction and amount of deviation of each turn, as well as the slot number and turn number where the tip portion 263 is not properly positioned.

[0064] The conductor position correction device 14 corrects the position of the top end of the conductor 26 of the stator 2 sent from the conductor top end inspection device 13 based on the information sent from the conductor top end inspection device 13. The stator 2 whose top end position is corrected by the conductor position correction device 14 is sent back to the conductor top end inspection device 13 and inspected again. In addition, the structure of the conductor position correction device 14 will be referred to below. Figures 5 to 14 Wait for a detailed explanation.

[0065] The joining device 15 joins the distal ends 263 of two adjacent conductive wires 26 by TIG welding on the stator 2 inspected by the conductive wire distal end inspection device 13, thereby forming the coil 25. The stator 2 is manufactured according to the above process.

[0066] Figure 5 This is a front view of the conductor position correction device 14 as viewed from the side of an operator (not shown). Figure 6 This is a plan view of the wire position correction device 14 as viewed from above in the vertical direction.

[0067] The wire position correction device 14 comprises: a support table 3 on which the stator 2 is mounted; a wire clamp 4 for holding the top end portion 263 of the wire leg 261 which is closer to the top end side than the bent portion 264; a rotating mechanism 5 for supporting the wire clamp 4 and allowing it to rotate freely around a specific rotation axis; a moving mechanism 6 for supporting these wire clamps 4 and the rotating mechanism 5 and allowing them to move freely in a specific direction; a computer 7 for performing calculations based on information sent from the wire top inspection device 13; a touch panel display 8 for displaying information sent from the wire top inspection device 13 or calculation results of the computer 7 in a manner that can be visually recognized by the operator; and an operating machine 9 provided with these support tables 3, moving mechanisms 6, and touch panel displays 8. In addition, in the following, the case where the number of slots of the stator 2 is set to 72 and the number of turns is set to 8 is described, but the number of slots or the number of turns are not limited to these. In addition, for ease of understanding, in Figure 5 Only one of the multiple (8×72) wire legs 261 protruding from the stator core 21 of the stator 2 is shown in FIG. Figure 6 The lead leg 261 is omitted in the figure.

[0068] The support table 3 includes: a plate-shaped main support table 30, which is provided on the working machine 9; a turntable 31, which supports the stator 2; a slide rail 32, which allows the stator 2 sent from the wire top inspection device 13 to be automatically Figure 5 and a slot position fixing rod 33 for fixing the position of the turntable 31, which can be operated by an operator.

[0069] The turntable 31 is a disk-shaped device that is slightly larger than the stator 2 in a plan view. The turntable 31 supports the stator 2 with the lead leg 261 facing vertically upward. The turntable 31 can freely rotate clockwise and counterclockwise relative to the main support 30 around the rotation axis 3a extending vertically in the center of the turntable 31. The stator 2 is fixed to the turntable 31 by positioning pins (not shown) in a manner that is coaxial with the rotation axis 3a of the turntable 31. In addition, as shown in FIG. Figure 6 As shown, a plurality of grooves 31a are formed on the outer periphery of the turntable 31. The number of these grooves 31a is, for example, the same as the number of slots of the stator 2, that is, 72, but the present invention is not limited thereto.

[0070] The slot position fixing rod 33 is located closer to the operator than the turntable 31 in the main support 30 and is rotatable around a shaft member 34 extending in the tangential direction of the turntable 31. A ball-shaped handle that the operator can grasp is provided at the top end of the slot position fixing rod 33, and a claw 33a that engages with one of the multiple grooves 31a formed in the turntable 31 is provided at the base end. Figure 5 As shown, the operator holds the slot position fixing rod 33 upright, causing the claw 33a of the slot position fixing rod 33 to engage with the groove 31a of the turntable 31, thereby controlling the rotation of the turntable 31 and the stator 2 supported thereby about the rotation axis 3a. Alternatively, the operator can pull the slot position fixing rod 33 forward and then lower it to release the above-mentioned control by disengaging the claw 33a of the slot position fixing rod 33 from the groove 31a of the turntable 31.

[0071] In addition, hereinafter, the slot closest to the operator among the multiple slots of the stator 2 provided on the turntable 31, that is, the slot closest to the slot position fixing rod 33, is referred to as the target slot 29. Figure 5 and Figure 6 In FIG, the left side is the circumferential clockwise side of the counterpart groove 29 , and the right side is the circumferential counterclockwise side of the counterpart groove 29 .

[0072] Figure 7A This is a front view of the wire clamp 4 as viewed from the operator's side. Figure 7B The wire holder 4 is along Figure 7A Cross-sectional view along line VII-VII. Figure 8 The figure shows a state where the tip end portion 263 of the wire leg portion 261 located vertically above the counterpart groove 29 is held by the wire holder 4 .

[0073] The wire clamp 4 comprises: split claws 41, 42 extending along the circumferential side portions 263a, 263b of the top end portion 263; a clamp body 43 supporting these split claws 41, 42 so as to be slidable along the claw width direction Dc; a rod-shaped handle 45 that can be rotated by the operator; and a claw opening prevention ring 46 that prevents the split claws 41, 42 from bending in the claw width opening direction.

[0074] Inside the clamp body 43, a chuck mechanism 44 is installed. This chuck mechanism 44 changes the width of the split claws 41 and 42 in response to the operator's operation of the handle 45. The chuck mechanism 44 converts the rotational motion of the handle 45 into linear motion along the width direction Dc of the split claws 41 and 42, thereby changing the width of the split claws 41 and 42. More specifically, when the operator rotates the handle 45 forward, the chuck mechanism 44 moves the split claws 41 and 42 closer together along the width direction Dc, closing them. Furthermore, when the operator rotates the handle 45 backward, the chuck mechanism 44 moves the split claws 41 and 42 farther apart along the width direction Dc, opening them.

[0075] One split claw 41 includes a base end 411 and a rod-shaped claw portion 412 extending from the base end 411 in a direction perpendicular to the claw width direction Dc. A notch portion 413 and a back plate portion 414 are formed on the inner side of the claw portion 412 along the claw width direction Dc, extending in the direction of extension. The other split claw 42 includes a base end 421 and a rod-shaped claw portion 422 extending from the base end 421 in a direction perpendicular to the claw width direction Dc. A notch portion 423 and a back plate portion 424 are formed on the inner side of the claw portion 422 along the claw width direction Dc, extending in the direction of extension.

[0076] Therefore, if Figure 7B As shown, between the claws 412 and 422, the notches 413 and 423 form a concave groove for receiving the top end 263 of the lead leg 261, that is, the top end receiving portion 47. Figure 8 As shown, the dividing claws 41, 42 receive the top end 263 of the wire leg 261 into the top end receiving portion 47, so that the top ends of the dividing claws 41, 42 abut against the root of the top end 263 of the wire leg 261 (that is, the junction of the top end 263 and the curved portion 264), and the two inner wall surfaces 47a, 47b of the top end receiving portion 47 clamp the two side portions 263a, 263b of the top end 263, thereby holding the top end 263.

[0077] The claw opening prevention ring 46 is columnar. A through hole 461 extending in a direction perpendicular to the claw width direction Dc is formed inside the claw opening prevention ring 46. Figure 8As shown, when the split claws 41 and 42 are closed, the claw portions 412 and 422 of the claw preventing ring 46 are inserted into the through-holes 461 and then secured to the split claws 41 and 42 by inserting the positioning pins 462. This prevents the split claws 41 and 42 from bending in the direction of the claw width. Furthermore, even when the claw preventing ring 46 is secured to the split claws 41 and 42 in this manner, the width of the split claws 41 and 42 can still be slightly varied.

[0078] Secondly, a reference Figure 5 and Figure 9 , while explaining the structure of the rotating mechanism 5.

[0079] Figure 9 It is a side view of the rotating mechanism 5. Figure 9 In the figure, the left side is the front side facing the operator, and the right side is the back side.

[0080] The rotation mechanism 5 includes: a clamper bracket 51, which supports the clamper body 43 on the back side of the wire clamper 4; a rotation mechanism body 52, which supports the clamper bracket 51 on the back side of the clamper bracket 51; a rotation shaft 53, which connects the clamper bracket 51 and the rotation mechanism body 52; a claw angle operating lever 54, which is provided on the clamper bracket 51; a claw angle adjustment mechanism 55, which is provided on the rotation mechanism body 52; and a claw angle sensor 56, which is provided on the back side of the rotation mechanism body 52.

[0081] The clamper holder 51 supports the back side of the clamper main body 43 of the wire clamper 4 so that the tip ends of the dividing claws 41 and 42 are located vertically above the counterpart groove 29 .

[0082] The rotating mechanism body 52 is a plate-shaped structure extending vertically. The rotating mechanism body 52 pivotally supports the clamper holder 51 via a rotation axis 53 located vertically below the rotating mechanism body 52. ​​In other words, the clamper holder 51 and the wire clamp 4 supported by it can freely rotate relative to the rotating mechanism body 52 about the rotation axis 53.

[0083] The rotating shaft 53 extends along the radial direction of the stator core 21. More specifically, the central axis 53a of the rotating shaft 53 extends along the radial direction and passes through the vicinity of the top end portions of the split claws 41, 42. More specifically, the central axis 53a passes through the top end portions of the split claws 41, 42, or passes through a position along the extending direction of the split claws 41, 42 and closer to the top end portions of the split claws 41, 42. Hereinafter, the intersection of the virtual line O extending along the extending direction of the split claws 41, 42 and passing through the top end portions of the split claws 41, 42 and the central axis 53a will be referred to as the base point P. Therefore, the wire clamp 4 can freely rotate relative to the rotating mechanism body 52, with the central axis 53a passing through the base point P set near the top end portions of the split claws 41, 42 as the center. Therefore, for example Figure 8 As shown, while the distal end 263 of the wire leg 261 is held by the dividing claws 41 and 42 of the wire holder 4, the distal end 263 can be moved toward the reference position by rotating the wire holder 4 about the central axis 53a passing through the base point P on the curved portion 264.

[0084] Hereinafter, the rotation angle of the wire clamp 4 around the rotation axis 53, that is, the angle of the dividing claws 41, 42 around the central axis 53a is also referred to as the claw angle. Figure 5 The middle is the right side, Figure 9 The surface side of the paper is set as the positive side of the claw angle, and the circumferential clockwise side of the target groove 29 (in Figure 5 The middle is the left side, Figure 9 In other words, if the split claws 41, 42 are tilted to the right side from the operator's perspective, the claw angle increases toward the positive side, and if the split claws 41, 42 are tilted to the left side from the operator's perspective, the claw angle decreases toward the negative side. Figure 9 As shown, the base point P is set at a position close to the tip of the dividing claws 41 and 42 along the virtual line O, but the present invention is not limited thereto. The base point P can be set at the tip of the dividing claws 41 and 42.

[0085] The claw angle sensor 56 detects the claw angle relative to a specific reference. The claw angle value detected by the claw angle sensor 56 is displayed on a display 57 mounted on the main support platform 30 in a manner that can be visually recognized by the operator. Furthermore, a reset button 57a ​​is provided on the display 57 for returning the claw angle value to zero. Specifically, the display 57 displays the claw angle value at the time the reset button 57a ​​was last pressed, returning the claw angle value to zero.

[0086] The claw angle operating rod 54 is in the shape of a rod. Figure 5As shown, the jaw angle operating lever 54 is provided on the upper portion of the clamp holder 51 so as to be coaxial with the dividing jaws 41 and 42 when viewed from the operator's side. Therefore, the operator can tilt the jaw angle operating lever 54 to the right or left from the operator's perspective to rotate the wire clamp 4 about the central axis 53a.

[0087] The claw angle adjustment mechanism 55 is located vertically above the rotating mechanism body 52. ​​It comprises a rotating shaft 551 extending circumferentially; bearings 552 rotatably supporting both ends of the rotating shaft 551; and a rotating handle 553 located at each end of the rotating shaft 551. Furthermore, a nut holder 554 is threaded onto the rotating shaft 551. Therefore, when an operator rotates the rotating handle 553 forward or reverse, causing the rotating shaft 551 to rotate forward or reverse, the nut holder 554 slides to the right or left as viewed from the operator's side.

[0088] like Figure 5 As shown, cylindrical brakes 555 and 556 extending radially are provided on the left and right sides of the nut bracket 554 from the operator's side perspective. The claw angle operating lever 54 is located between these brakes 555 and 556. Therefore, the operator can rotate the rotary handle 553 forward while the brake 556 abuts the claw angle operating lever 54, thereby tilting the claw angle operating lever 54 clockwise in the circumferential direction, thereby fine-tuning the claw angle. Furthermore, the operator can reverse the rotary handle 553 while the brake 555 abuts the claw angle operating lever 54, thereby tilting the claw angle operating lever 54 counterclockwise in the circumferential direction, thereby fine-tuning the claw angle.

[0089] like Figure 5 and Figure 6 As shown, the moving mechanism 6 includes a circumferential moving mechanism 60 that supports the rotating mechanism 5; a vertical moving mechanism 63 that supports the circumferential moving mechanism 60; and a radial moving mechanism 68 that supports the vertical moving mechanism 63. The moving mechanism 6 uses the circumferential moving mechanism 60, the vertical moving mechanism 63, and the radial moving mechanism 68 to movably support the wire clamp 4 and the rotating mechanism 5 above the support table 3 along the circumferential and vertical directions of the stator core 21, as well as the radial direction of the stator core 21. The structures of the circumferential moving mechanism 60, the vertical moving mechanism 63, and the radial moving mechanism 68 will be described below in order.

[0090] The circumferential movement mechanism 60 includes a support plate 61 that supports the rotation mechanism main body 52 from the back side, and a circumferential fixing mechanism 62 that fixes the position of the rotation mechanism main body 52 relative to the support plate 61 .

[0091] The support plate 61 is provided with a track (not shown) extending in the left-right direction from the operator's side perspective, that is, in the direction tangential to the circumferential contact of the target groove 29. The rotation mechanism main body 52 is slidably mounted along the track provided on the support plate 61. A circumferential movement lever 60a operable by the operator is provided on the left side of the rotation mechanism main body 52 from the operator's side perspective. Thus, by operating the circumferential movement lever 60a, the operator can move the rotation mechanism 5 and the wire clamp 4 supported by the rotation mechanism 5 along the circumference of the target groove 29.

[0092] The circumferential fixing mechanism 62 includes a columnar stopper 621 and clamping screws 622, 623 located on the left and right sides of the stopper 621 from the operator's side perspective. The stopper 621 is fixed to the support plate 61. Furthermore, the clamping screws 622, 623 are screwed into brackets located on the left and right sides of the stopper 621 in the rotation mechanism body 52. ​​Therefore, the operator adjusts the position of the base point P of the target groove 29 along the circumferential direction by operating the circumferential movement lever 60a and then tightens the clamping screws 622, 623. These clamping screws 622, 623 clamp the stopper 621, thereby fixing the circumferential position of the target groove 29.

[0093] The vertical direction moving mechanism 63 includes a support column 64 that supports the circumferential direction moving mechanism 60 , a height moving handle 65 and a height fixing lever 66 that can be operated by an operator.

[0094] The support 64 is a columnar column extending in the vertical direction and is located on the left side of the turntable 31 from the operator's side view. A track 641 extending in the vertical direction is formed on the support 64. The support plate 61 of the circumferential movement mechanism 60 is slidable along the track 641.

[0095] Inside the support column 64 is a mechanism that converts the rotational motion of the height movement handle 65 into linear motion along the track 641 of the support plate 61. Therefore, by rotating the height movement handle 65 forward or reverse, the operator can raise or lower the circumferential movement mechanism 60, the rotation mechanism 5, and the wire clamp 4 vertically upward or downward, thereby adjusting the vertical height of the base point P. Furthermore, after adjusting the vertical height of the base point P by operating the height movement handle 65, the operator can fix the position of the support plate 61 relative to the track 641 by operating the height fixing lever 66, thereby fixing the vertical height of the base point P.

[0096] On the right side of the support 64, from the operator's side perspective, is a vertically extending cylindrical stopper 642 and a stopper height adjustment mechanism 643. This stopper height adjustment mechanism 643 adjusts the vertical height of the support 64 relative to the stopper 642, depending on the type of stator 2. Furthermore, an abutment bolt 645 is provided on the support plate 61 vertically above the stopper 642.

[0097] Therefore, if the operator lowers the support plate 61 by operating the height moving handle 65, the abutting bolt 645 abuts the brake 642, thereby restricting the movement of the support plate 61 to the vertical downward side. Figure 8 As shown, the height of the stopper 642 is adjusted so that the top ends of the dividing claws 41 and 42 abut against the base of the top end 263 of the lead leg 261 .

[0098] The height of the top portion 263 (i.e., the vertical height from the support base 3 to the top portion 263) varies depending on the type of stator 2. Therefore, if the vertical height of the splitting claws 41, 42 is too low, the splitting claws 41, 42 may collide with the wire leg 261, causing the wire leg 261 to bend in an unintended direction. The vertical movement mechanism 63 uses the stopper height adjustment mechanism 643 to adjust the height of the stopper 642 to a height appropriate for the type of stator 2, thereby preventing the splitting claws 41, 42 from being too low.

[0099] The radial movement mechanism 68 is located on the left side of the turntable 31 of the main support platform 30 from the operator's side perspective. The radial movement mechanism 68 comprises a slide rail 681 provided on the main support platform 30 and extending radially along the mating groove 29; a support platform 682 slidably slidable along the slide rail 681; a rotation shaft 683 extending parallel to the slide rail 681; bearings 684 rotatably supporting both ends of the rotation shaft 683; and a rotation handle 685 provided at each end of the rotation shaft 683.

[0100] The support 682 has a support column 64 fixed to its upper surface. The vertical movement mechanism 63, the circumferential movement mechanism 60, the rotation mechanism 5, and the wire clamp 4, along with the support 682, can slide freely along the slide rail 681. Furthermore, a rotating shaft 683 is screwed onto the support 682. Therefore, when an operator rotates the rotary handle 685 forward or reverse, thereby rotating the rotating shaft 683 forward or reverse, the support 682 moves along the direction in which the slide rail 681 extends, that is, in the radial direction of the target groove 29. Therefore, by operating the rotary handle 685, the operator can adjust the position of the base point P along the radial direction of the target groove 29.

[0101] The computer 7 displays the data sent from the wire tip inspection device 13 and calculation results based on the data on the touch panel display 8 .

[0102] First, after receiving the data sent from the wire tip inspection device 13, the computer 7 reports the slot number of the tip portion 263 that is not configured in the appropriate position to the operator. Figure 10A The initial image shown is displayed on the touch panel display 8 .

[0103] exist Figure 10A The figure shows the situation where all slot numbers (1 to 72) are displayed as a matrix. Figure 10A As shown, different colors are used to display the slot numbers where all the top portions 263 are configured in the appropriate position (i.e., the slot numbers that do not need to be corrected), and the slot numbers where there are top portions 263 that are not configured in the appropriate position (i.e., the slot numbers that need to be corrected). Figure 10A In the example shown, the top end 263 is not positioned properly in the 55th and 70th slots. Figure 10A By observing the image shown, you can easily grasp the slot number that needs to be corrected.

[0104] In addition, if the computer 7 displays Figure 10A When the initial image shown is displayed, the operator operates the touch panel display 8, and then Figure 10B The detailed image shown is displayed on the touch panel display 8. More specifically, Figure 10B In the Figure 10A The example of the display of the detailed image when the slot number 55 requiring correction by the operator is selected in the initial image shown.

[0105] like Figure 10B As shown, in the detailed image after selecting the slot number, the following are displayed in sequence from the upper part: a column 101 showing the slot number selected by the operator, a column 102 showing the offset direction and offset amount of each turn, a calculation button 103 that can be operated by the operator, and a column 104 showing the calculation result of the computer 7.

[0106] The computer 7 displays the direction and amount of deviation of the top position of each turn relative to the reference position in the slot number selected by the operator based on the data sent from the wire top inspection device 13. Figure 10B In the figure, "CW" indicates the clockwise direction and "CCW" indicates the counterclockwise direction. Figure 10B The method shown uses different colors to display the following situations: the offset exceeds the reference Figure 4The threshold values ​​Acw, Accw are described, and the tip position needs to be moved to the reference position; and the offset does not exceed the threshold values ​​Acw, Accw, and the tip position does not need to be moved to the reference position. Figure 10B The figure shows a situation where the offset of the fifth turn exceeds Accw (a5>Accw) and the offset of the seventh turn exceeds Acw (a7>Acw).

[0107] The computer 7 displays Figure 10B When the operator selects the turn number to be corrected and presses the calculation button 103, the operator performs the following calculation based on the offset direction and offset amount of the selected turn number. Figures 11 to 13 The calculations described above are performed to calculate the correction direction and correction angle, and the calculation results for these correction directions and correction angles are displayed in column 104. Figure 10B The figure shows the situation where the operator selects the 5th turn.

[0108] Here, the so-called "correction direction" refers to the direction in which the tip of the wire leg 261 needs to be moved in order to bring it closer to the reference position, and is either the circumferential clockwise side (CW) or the circumferential counterclockwise side (CCW). In addition, the so-called "correction angle" refers to the angle in which the tip of the wire leg 261 is shifted from the reference position to the state in which the tip is aligned with the reference position, such as Figure 8 As shown, while the tip portion 263 is held by the split claws 41 and 42 , it is rotated by a desired claw angle about the central axis 53 a passing through the base point P.

[0109] Figure 11 This is a diagram showing the conductor leg 261 of the first turn, which serves as a reference position, and the conductor leg 261 whose tip position is shifted clockwise in the circumferential direction relative to the reference position, as viewed from the outside in the radial direction.

[0110] like Figure 11 As shown, in order to bring the tip of the wire leg 261, which has deviated from the reference position, closer to the reference position, the tip needs to be moved in the direction opposite to the direction of deviation from the reference position. Therefore, the computer 7 displays the direction opposite to the deviation direction as the correction direction in the column 104.

[0111] Figure 12 FIG is a diagram schematically illustrating the process of moving the top end of the lead leg 261 to the reference position using the split claws 41 and 42. Figure 12 The left side of the drawing shows the state where the top end 263 of the lead leg 261 is held by the split claws 41, 42. Figure 12The center of the drawing shows the state where the top of the split claws 41, 42 is used as the base point P, so that the wire leg 261 is bent by rotating it only at a specific claw angle. Figure 12 The right side of FIG. 2 shows a state where the lead leg 261 is bent and the separation claws 41 and 42 are released from holding the lead leg 261 .

[0112] like Figure 12 As shown, after the split claws 41 and 42 bend the wire leg 261, if the split claws 41 and 42 release their grip on the wire leg 261, the tip of the wire leg 261 will move in the direction opposite to the correction direction due to springback. Therefore, in order to anticipate the rebound recovery amplitude and bring the tip position into alignment with the reference position, the computer 7 sets the correction angle of the split claws 41 and 42 to an angle greater than the angle formed by the line La passing through the pre-correction tip position and the base point P, and the line Lb passing through the reference position and the base point P.

[0113] More specifically, the computer 7 stores a graph based on the correlation between the rotation angle of the split claws 41, 42 centered on the central axis 53a passing through the base point P and the amount of movement of the tip position of the wire leg 261 in consideration of the rebound after the bending process (see FIG. Figure 13 ). This graph can be drawn by conducting a test in advance. The computer 7 uses the offset sent by the wire tip inspection device 13 as the movement amount and retrieves the Figure 13 The recovery range of the rebound is estimated by using the graph shown, and a correction angle for aligning the tip position with the reference position is calculated and displayed in the column 104 .

[0114] Next, a specific flow of correcting the position of the tip of the wire leg portion to the reference position using the wire position correction device 14 will be described.

[0115] Figure 14 1 is a flowchart showing a specific process of the conductor position correction method. First, in S1 , the operator fixes the stator 2 on the turntable 31 .

[0116] In S2 , the operator operates the stopper height adjustment mechanism 643 of the vertical direction moving mechanism 63 to set the height of the stopper 642 to a height suitable for the type of the stator 2 fixed to the turntable 31 .

[0117] In S3, the operator observes the initial image displayed on the touch panel display 8 (see Figure 10A ) to confirm the slot number that needs to be corrected. In addition, in S3, the operator rotates the turntable 31 so that the confirmed slot number matches the target slot 29, and then fixes the turntable 31 by operating the slot position fixing lever 33.

[0118] In S4, the operator observes the detailed image displayed on the touch panel display 8 (see Figure 10B ) to confirm the turn number that needs to be corrected. Furthermore, in S4, the operator operates the rotary handle 685 of the radial movement mechanism 68 to move the split claws 41, 42 radially of the stator 2, thereby positioning the split claws 41, 42 vertically above the confirmed turn number. Consequently, the wire leg 261 that needs to be corrected is positioned vertically below the split claws 41, 42.

[0119] In S5, the operator operates the height moving handle 65 of the brake vertical direction moving mechanism 63 while the split claws 41 and 42 are open, thereby lowering the split claws 41 and 42 until they abut against the bolt 645 and contact the brake 642, and inserting the top end receiving portion 47 of the split claws 41 and 42 into the top end portion 263 of the wire leg 261 to be corrected (see Figure 12 At this time, the operator appropriately operates the rotary handle 685, the circumferential movement rod 60a, and the claw angle operating lever 54 to fine-tune the radial, circumferential, and claw angle directions of the split claws 41, 42 without bending the wire leg 261, and inserts the distal end receiving portion 47 of the split claws 41, 42 in the direction of the distal end portion 263.

[0120] In S6, while the tip 263 of the wire leg 261 is inserted into the tip receptacle 47, the operator operates the height fixing lever 66 of the vertical movement mechanism 63 and the clamping screws 622, 623 of the circumferential movement mechanism 60 to fix the vertical height and circumferential position of the split claws 41, 42. Furthermore, in S6, the operator operates the handle 45 of the wire clamp 4 to close the width of the split claws 41, 42, thereby clamping the two side portions 263a, 263b of the tip 263 with these split claws 41, 42, thereby holding the tip 263.

[0121] In S7 , the operator operates the touch panel display 8 to display the calculation results of the correction direction and the correction angle on the touch panel display 8 .

[0122] In S8, the operator operates the rotary handle 553 of the claw angle adjustment mechanism 55 to move the nut holder 554 in the correction direction until one of the stoppers 555 and 556 abuts the claw angle operating lever 54. Furthermore, while one of the stoppers 555 and 556 lightly abuts the claw angle operating lever 54, the operator presses the reset button 57a ​​on the display 57 to reset the claw angle value to zero.

[0123] In S9, the operator operates the rotating handle 553 of the claw angle adjustment mechanism 55 until the claw angle displayed on the display 57 is the same as the correction angle displayed on the touch panel display 8, thereby rotating the dividing claws 41, 42 around the central axis 53a passing through the base point P set on the bending portion 264, bending the wire leg 263 so that the top position moves in the correction direction.

[0124] According to the guide wire position correction device 14 of this embodiment, the following effects are achieved.

[0125] (1) The conductor position correction device 14 comprises: a conductor clamp 4 for holding the top end 263 of the conductor leg 261 protruding from the slot 22 of the stator core 21; and a rotating mechanism 5 for supporting the conductor clamp 4 and freely rotating the split claws 41, 42 about a central axis 53a passing through a base point P set on the bent portion 264, so as to move the top end position of the conductor leg 261 toward a direction approaching a reference position. According to the conductor position correction device 14, while the top end 263 of the conductor leg 261 is held by the split claws 41, 42, the split claws 41, 42 are rotated by the rotating mechanism 5 to bend the conductor leg 261. This allows the top end position to be brought closer to the reference position without causing the position of the portion of the conductor leg 261 closer to the slot 22 than the base point P to be offset or bent. Therefore, compared with the conventional case of bending the base of the conductor leg, the recovery range of the top end 263 caused by springback after bending can be reduced. Thereby, the position of the tip of the target wire leg portion 261 can be corrected with high precision.

[0126] (2) The conductor position correction device 14 includes a computer 7 that calculates a correction angle required to correct the tip position to a reference position based on a map that defines the correlation between the rotation angle of the split jaws 41, 42 centered about the central axis 53a passing through the base point P and the amount of movement of the tip position to account for the springback of the conductor leg 261 after bending. According to the conductor position correction device 14, the split jaws 41, 42 are rotated only by the correction angle calculated by the computer 7, thereby allowing for the springback of the conductor leg 261 after bending and accurately correcting the tip position.

[0127] (3) The wire position correction device 14 comprises: a support table 3 for supporting the stator 2 in a state where the wire leg 261 is facing upward in the vertical direction; and a moving mechanism 6 for freely moving the wire clamp 4 and the rotating mechanism 5 in the vertical, circumferential, and radial directions above the support table 3. According to the wire position correction device 14, when the top end 263 of the wire leg 261 is held by the splitting claws 41, 42, the splitting claws 41, 42 can be finely adjusted while the rotation angle and the position of the splitting claws 41, 42 in the vertical, circumferential, and radial directions are adjusted, while the splitting claws 41, 42 are brought close to the top end 263 of the wire leg 261. Thus, when the splitting claws 41, 42 are brought close to the top end 263, the splitting claws 41, 42 abut against the top end 263, thereby preventing the position of the target wire leg 261 from being displaced or bent. Thus, the top end position of the target wire leg 261 can be corrected with high precision.

[0128] (4) In the wire position correction device 14, a device including split claws 41, 42 extending along the two side portions 263a, 263b of the tip portion 263 and a chuck mechanism 44 for changing the claw width of the split claws 41, 42 is used as the wire clamp 4. With this arrangement, the tip receiving portion 47 of the split claws 41, 42 can be inserted into the tip portion 263 with the claw width opened, and then the tip portion 263 can be held by the split claws 41, 42 by closing the claw width. By rotating the split claws 41, 42 about the central axis 53a, the tip portion 263 of the wire leg 261 can be prevented from being displaced relative to the split claws 41, 42 when the wire leg 261 is bent, or the wire leg 261 is prevented from being bent at an unintended portion. In this manner, the tip position of the target wire leg 261 can be corrected with high precision.

[0129] (5) In the bending step before correcting the tip position of the wire 26, the wire 26 protruding from the groove 22 is bent to form a wire leg 261 having an inclined portion 262 inclined relative to the axial direction of the groove 22 and a tip portion 263 extending along the axial direction of the groove 22. In this regard, the split claws 41 and 42 hold the tip portion 263 by clamping the two side portions 263a and 263b of the tip portion 263 along the circumferential direction, and the rotating mechanism 5 freely rotates the split claws 41 and 42 around the central axis 53a. According to the wire position correction device 14, the split claws 41 and 42 are rotated around the central axis 53a passing through the base point P and perpendicular to the above-mentioned circumferential direction to bend the wire leg 261, thereby correcting the poor circumferential arrangement of the tip portion 263 caused by the bending process.

[0130] While one embodiment of the present invention has been described above, the present invention is not limited thereto and the detailed structure can be appropriately modified within the scope of the gist of the present invention.

[0131] In the above embodiment, the wire clamp 4 having the split claws 41 and 42 is used as the holding means for holding the distal end of the wire leg. However, the present invention is not limited thereto. For example, a cylindrical member insertable into the distal end of the wire leg may be used as the holding means.

[0132] Furthermore, in the above embodiment, the following situation is described, but the present invention is not limited thereto: the base point P is set on the curved portion 264 by lowering the splitting claws 41 and 42 until they abut against the bolt 645 and contact the stopper 642, that is, by lowering the splitting claws 41 and 42 until the top ends of the splitting claws 41 and 42 contact the base of the top end 263 of the lead leg 261. The base point P may also be set closer to the top end 263 than the curved portion 264.

[0133] Reference numerals

[0134] 1: Stator manufacturing equipment

[0135] 101: Column showing the slot number selected by the operator

[0136] 102: Column showing the offset direction and offset amount of each turn

[0137] 103: Operation button

[0138] 104: Column showing the calculation results of the computer

[0139] 11: Arrange the insertion device

[0140] 12: Bending device

[0141] 13: Wire tip inspection device

[0142] 14: Wire position correction device

[0143] 15: Jointing device

[0144] 2: Stator

[0145] 21: stator core

[0146] 22: Slot

[0147] 23: Tooth

[0148] 25: Coil

[0149] 26: Wire

[0150] 261: Wire foot

[0151] 262: Inclined part

[0152] 263: Top

[0153] 263a, 263b: Side

[0154] 264: Bend

[0155] 27: Multiple coil elements

[0156] 29: Correction of object slot

[0157] 3: Support Desk

[0158] 3a: Rotation axis

[0159] 30: Main support platform

[0160] 31: Turntable

[0161] 31a: Groove

[0162] 32: Slide rail

[0163] 33: Slot position fixing rod

[0164] 33a: Claw

[0165] 34: Shaft component

[0166] 4: Wire holder (holding device)

[0167] 41,42: Splitting Claw

[0168] 411: Base end

[0169] 412,422: Claws

[0170] 413,423: gap

[0171] 414: Back panel

[0172] 421: base end

[0173] 424: Back panel

[0174] 43: Clamp body 43

[0175] 44: Chuck mechanism

[0176] 45: handle

[0177] 46: Claw opening prevention ring

[0178] 461: Through hole

[0179] 462: Positioning pin

[0180] 47: Top storage area

[0181] 47a, 47b: Inner wall surface

[0182] 5: Rotation mechanism

[0183] 51: Clamp bracket

[0184] 52: Rotating mechanism body

[0185] 53: Rotation axis

[0186] 53a: Central axis

[0187] 54: Claw angle operating lever

[0188] 55: Claw angle adjustment mechanism

[0189] 551: Shaft

[0190] 552: Bearings

[0191] 553: Rotating handle

[0192] 554: Nut bracket

[0193] 555,556: brake

[0194] 56: Claw angle sensor

[0195] 57: Display

[0196] 57a: Reset button

[0197] 6: Mobile mechanism

[0198] 60: Circumferential movement mechanism

[0199] 60a: Circumferential moving rod

[0200] 61: Support board

[0201] 62: Circumferential fixing mechanism

[0202] 621: Brake

[0203] 622,623: Clamping screws

[0204] 63: Vertical moving mechanism

[0205] 64: Pillar

[0206] 641: Track

[0207] 642: Brake

[0208] 643: Brake height adjustment mechanism

[0209] 645: Abutment bolt

[0210] 65: Height movement handle

[0211] 66: Height fixing rod

[0212] 68: Radial movement mechanism 68

[0213] 681: Slide rail

[0214] 682: Support Desk

[0215] 683: Shaft

[0216] 684: Bearings

[0217] 685: Rotating handle

[0218] 7: Computer (rotation angle calculation method)

[0219] 8: Display

[0220] 9: Operation machine

[0221] L1: Threshold

[0222] L2: Threshold

[0223] P: basis points

Claims

1. A method for correcting the position of a conductor wire, comprising: in a stator having an annular stator core having a plurality of slots formed therein; and a plurality of conductor wires disposed in the slots; correcting the position of the tips of conductor legs of the conductor wires protruding from the slots to a reference position; the method comprising the following steps: a holding step of holding the tip portion of the wire leg by clamping the tip portion closer to the tip side than the bent portion with a split claw, the split claw extending along both sides of the tip portion; and The bending step includes rotating the split claw about a central axis extending in the radial direction of the stator core and passing through a base point set at the bent portion or closer to the tip portion than the bent portion on a virtual line extending in the extending direction of the split claw, thereby bending the wire leg so that the tip portion is moved in a direction approaching the reference position.

2. A conductor position correction method, comprising, in a stator having an annular stator core having a plurality of slots formed therein and a plurality of conductors disposed in the slots, correcting the positions of the tips of conductor legs of the conductors protruding from the slots to a reference position, the conductor position correction method comprising the following steps: a holding step of holding the tip portion of the wire leg that is closer to the tip side than the bent portion by a holding device; and The bending step comprises rotating the holding device about a central axis extending in the radial direction of the stator core and passing through the bent portion or a base point closer to the tip portion than the bent portion, thereby bending the wire leg so that the tip portion is moved toward the reference position. in, The wire position correction method includes the following steps: based on the correlation between the rotation angle of the holding device centered on the central axis and the movement amount of the tip position taking into account the rebound of the wire leg after bending, in the bending step, calculating the rotation angle required to correct the tip position to the reference position.

3. The method for correcting the position of a conducting wire according to claim 2, wherein: The holding device includes split claws extending along both sides of the top end portion. In the holding step, the dividing claw is inserted in the direction of the distal end portion.

4. The method for correcting the position of a conducting wire according to claim 3, wherein: The holding device includes a chuck mechanism for changing the width of the splitting claw. In the holding step, the splitting claw is inserted into the distal end portion with the claw width opened, and then the claw width is closed to hold the distal end portion.

5. The guide wire position correction method according to any one of claims 1 and 3 to 4, wherein: The conductor leg portion, when viewed along the radial direction of the stator core, comprises, in order from the slot side toward the tip side, an inclined portion inclined with respect to the axial direction of the slot and extending in the circumferential direction of the stator core, and the tip portion inclined with respect to the inclined portion and extending in the axial direction of the slot. In the holding step, the split claws clamp both sides of the top end portion along the circumferential direction, thereby holding the top end portion. In the bending step, the dividing claw is rotated about the central axis.

6. A conductor position correction device, comprising, in a stator including an annular stator core having a plurality of slots formed therein and a plurality of conductors disposed in the slots, for correcting the positions of the tips of conductor legs of the conductors protruding from the slots to a reference position, the conductor position correction device comprising: a splitting claw that holds the tip portion of the wire leg by clamping the tip portion closer to the tip side than the bent portion, the splitting claw extending along both sides of the tip portion; and The rotating mechanism supports the split claw and freely rotates the split claw about a central axis extending in the radial direction of the stator core and passing through a base point set at the curved portion or closer to the tip portion than the curved portion on a virtual line extending in the extending direction of the split claw, so that the tip portion is moved in a direction approaching the reference position.

7. A conductor position correction device, comprising, in a stator including an annular stator core having a plurality of slots formed therein and a plurality of conductors disposed in the slots, for correcting the positions of the tips of conductor legs of the conductors protruding from the slots to a reference position, the conductor position correction device comprising: a holding device for holding a tip portion of the wire leg that is closer to the tip side than the bent portion; a rotating mechanism that supports the holding device and freely rotates the holding device about a central axis that passes through the curved portion or a base point closer to the tip portion than the curved portion and extends in the radial direction of the stator core, so as to move the tip portion toward the reference position; and A computer calculates the rotation angle required to correct the tip position to the reference position based on a correlation between the rotation angle of the holding device about the central axis and the amount of movement of the tip position in consideration of springback of the wire leg after bending.

8. The guide wire position correction device according to claim 7, wherein: The conductor position correction device comprises: a support stand for supporting the stator in a state where the conductor leg is directed upward in a vertical direction; and The moving mechanism enables the holding device and the rotating mechanism to freely move above the support table along the vertical direction, the circumferential direction of the stator core, and the radial direction of the stator core.

9. The wire position correction device according to claim 8, wherein: The holding device includes split claws extending along both sides of the distal end portion, and a chuck mechanism for changing the claw width of the split claws.

10. The guide wire position correction device according to claim 6 or 9, wherein: The conductor leg portion, when viewed along the radial direction of the stator core, comprises, in order from the slot side toward the tip side, an inclined portion inclined with respect to the axial direction of the slot and extending in the circumferential direction of the stator core, and the tip portion inclined with respect to the inclined portion and extending in the axial direction of the slot. The split claws hold the top end portion by clamping both sides of the top end portion along the circumferential direction. The rotating mechanism allows the splitting claw to rotate freely about the central axis.

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