JP2017200320A - Coating removal method for wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce cost and to secure a cross-sectional area of a core material when removing coating of a wire.SOLUTION: According to a coating removal method for a wire, in a first coating removal step, a pair of first coating parts coating a pair of side faces in a coating material 42 is removed from a wire 40 while shaving surface parts of the pair of first side faces by moving a pair of blades along the pair of first side faces of a core material 41 of which the cross section is formed rectangular. In a second coating removal step, a pair of second coating parts coating a pair of second side faces in the coating material 42 is removed from the wire 40 while shaving surface parts of the pair of second side faces by moving the pair of blades along the pair of second side faces. In the first coating removal step, a recess 57 is generated in the wire 40 by bringing the pair of blades into slide-contact with the core material 41. A pressing step is implemented between the first coating removal step and the second coating removal step. In the pressing step, the wire 40 is pressed from a side of another second side face 52 that is a blade come-out side in the first coating removal step in such a manner than depth of the recess 57 is reduced.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a wire film removal method applied to a wire material having a core material having a quadrangular cross section and a film material covering the core material.

  Conventionally, as a method for removing a film from a wire, for example, the following methods are available. That is, Patent Document 1 discloses a method for removing the coating film of the rectangular winding. In the method described in Patent Document 1, first, the coating on the pair of long side surfaces (two main surfaces) in the winding is removed with a blade, and then the pair of short side surfaces (two side surfaces) in the winding is removed. The coating is removed with a blade. Finally, the pair of edge portions on the blade missing side in the winding is chamfered by a chamfering die.

JP2013-21939A

  However, in the method described in Patent Document 1, it is necessary to process at least six surfaces including chamfering. In fact, if the film is left, there is a risk of causing poor welding or the like, and therefore, eight-side processing including chamfering of the pair of edge portions on the blade entering side is required. For this reason, processing man-hours and capital investment increase, resulting in a cost increase.

  Furthermore, when removing a film of a pair of long side surface, a recessed part generate | occur | produces in the short side surface of the blade entering side of a wire, when a blade contacts a core material. Here, in order not to leave a coating film, when the removal thickness of the long side surface or the short side surface is small, it is necessary to increase the chamfering depth, and conversely, the chamfering depth is small. In this case, it is necessary to increase the removal thickness of the long side surface or the short side surface.

  Therefore, after all, the removal substantially exceeds the film thickness, and as a result, the cross-sectional area of the core material becomes small. When the cross-sectional area of the core material is small, there are effects such as an increase in electrical resistance of the core material and a decrease in welding strength. Since the film thickness and the removal thickness hardly depend on the size of the wire diameter, this influence increases as the wire diameter decreases.

  This invention is made | formed in view of the said subject, Comprising: It aims at providing the coating-film removal method of a wire which can implement | achieve cost reduction and ensuring of the cross-sectional area of a core material.

  In order to solve the above-mentioned problem, a method for removing a coating film of a wire according to claim 1 is characterized in that a wire material having a square cross-sectional core material and a coating material covering the core material is a pair of core materials. While moving the pair of blades along the first side surface and scraping the surface portion of the pair of first side surfaces, the pair of first coating portions covering the pair of first side surfaces of the coating material is removed from the wire. The first film removal step to be removed and the second side surface of the pair of second side surfaces of the core material as the surface portions of the pair of first side surfaces are shaved in the first film removal step. A pressing step of pressing the wire from the other second side of the pair of second side surfaces along the pair of second side surfaces so that the depth of the concave portion generated in the wire is reduced While moving the pair of blades and scraping the surface portions of the pair of second side surfaces, And a second film removing step of removing from the wire of the pair the second film portion covering the pair of second side of the timber.

  In this wire material film removal method, the pair of first film portions are removed from the wire material while the pair of blades are moved along the pair of first side surfaces of the core material to scrape the surface portions of the pair of first side surfaces. Here, when the pair of blades are moved to cut the surface portions of the pair of first side surfaces, the pair of blades are brought into sliding contact with the core material, whereby a force in the moving direction of the blade acts on the core material. For this reason, a recessed part arises in a wire at the side of one second side which is a blade insertion side. In such a state where the recess is formed, in order to prevent the film from being left in the subsequent second film removal step, it is necessary to increase the removal thickness. However, if the removal thickness is increased, the core material The amount of shaving increases and the cross-sectional area of the core material decreases.

  However, according to this wire film removing method, after the first film removing step, a pressing step is performed, and in this pressing step, the wire is pressed from the other second side surface which is the blade removal side. Correct the recess and reduce the depth of the recess. Therefore, in the subsequent second coating removal step, when removing the pair of second coating portions from the wire while scraping the surface portions of the pair of second side surfaces, the removal thickness can be small, so the amount of shaving of the core material The cross-sectional area of the core material can be secured.

  Further, in the first film removal step, sagging occurs in the pair of edge portions located on the side of the second side that is the blade insertion side (the portion where the film is pulled down by the blade), but the subsequent pressing step Then, since the wire is pressed from the other second side which is the blade removal side, this sagging can be reduced. As a result, since the chamfering of the pair of edge portions is not necessary, it is possible to prevent an increase in processing man-hours and equipment investment and to reduce the cost.

  In addition, as described in claim 2, in the pressing step in the wire film removal method according to claim 1, the wire rod may be pressed by pressing a convex portion of a pressing punch against the wire material.

  Thus, when the wire rod is pressed by pressing the convex portion of the pressing punch against the wire material, the wire material can be locally pressed from the side opposite to the recessed portion, so that the recessed portion can be corrected more accurately.

  Also, as described in claim 3, in the wire film removal method according to claim 2, as the pressing punch, the core material formed on the wire material by removing the pair of first film portions. A press punch having the same width as the exposed portion may be used.

  As described above, when a press punch having the same width as the core material exposed portion formed on the wire is used by removing the pair of first coating portions as the press punch, the same width as the core material exposed portion is obtained. Since the wire can be locally pressed within the range, it is possible to more accurately correct the concave portion by suppressing the stress from acting on the portion other than the concave portion.

  Further, as described in claim 4, in the method for removing a wire film according to claim 3, as the pressing punch, a pressing punch in which corners on both sides in the lateral width direction on the pressing surface against the wire are chamfered portions. It may be used.

  As described above, when a press punch in which the corners on both sides in the width direction of the pressing surface to the wire rod are chamfered portions is used as the press punch, the pair of chamfered portions bite into the wire material, so that the press punch is against the recess. While being positioned in the axial direction of the wire rod and pressing the wire rod from the other second side surface toward the center of the recess, the recess can be corrected efficiently.

  Moreover, in the said press process in the coating-film removal method of the wire rod as described in any one of Claims 2-4, the same shape and the same size as the convex part of the said press punch as described in Claim 5. A support punch having a plurality of protrusions may be used, and the protrusions of the support punch may be inserted inside the recesses.

  In this way, in the pressing step, when a support punch having a convex part having the same shape and size as the convex part of the pressing punch is used, the wire can be evenly pressed from both sides by the pressing punch and the supporting punch. The depths of the recesses formed on both sides can be made uniform. Thereby, in a subsequent 2nd film removal process, a pair of 2nd film part can be removed by the uniform removal thickness centering on the center axis line of a wire. As a result, the film removal part from which the first film part and the second film part are removed can be formed coaxially with the central axis of the wire.

It is sectional drawing of a rotary electric machine. It is an enlarged view of the conductor member periphery part in the rotary electric machine of FIG. It is the figure which looked at the stator of FIG. 1 from the axial direction. It is a figure which shows the conductor member used for the stator of FIG. It is a figure explaining a 1st film removal process. It is a figure explaining the first half of a press process. It is a figure explaining the latter half of a press process. It is a figure explaining a 2nd film removal process. It is a graph which shows the relationship between the depth of a recessed part, and a film removal length. It is a figure which shows the press punch and support punch which are used in a press process. It is a figure explaining the other example of a 2nd film removal process. It is a figure which shows the modification of a press punch and a support punch. It is a figure which shows the modification of a press process. It is a figure explaining the film removal method of the wire concerning a comparative example.

  Hereinafter, an embodiment of the present invention will be described.

  A rotating electrical machine 10 shown in FIG. 1 includes a plurality of conductor members 30 from which a film has been removed by a method for removing a film of a wire according to an embodiment of the present invention described later. The rotating electrical machine 10 includes a shaft 11, a rotor 12, a stator 13, and a pair of frames 14 and 15.

  The shaft 11 is fixed to the shaft core portion of the rotor 12, and the stator 13 is annularly provided around the rotor 12. The pair of frames 14 and 15 are disposed on both axial sides of the rotor 12 and the stator 13, and the shaft 11 is rotatably supported by the pair of frames 14 and 15 via the pair of bearings 16 and 17, respectively. Yes.

  As shown in FIG. 2, the rotor 12 includes a rotor core 18 and a rotor magnet 19 provided on the outer periphery of the rotor core 18. The stator 13 has a stator core 20 and a plurality of conductor members 30 assembled to the stator core 20.

  As shown in FIG. 3, the stator core 20 has a plurality of teeth 21 extending toward the center of the stator core 20, and slots 22 are formed between the plurality of teeth 21. Yes. The plurality of conductor members 30 are formed by bending a wire rod into a substantially U shape, and are inserted across a pair of adjacent slots 22 among the plurality of slots 22. In a pair of adjacent slots 22, a plurality of conductor members 30 are inserted side by side in the length direction of the teeth 21. The plurality of conductor members 30 have different lengths and shapes depending on the arrangement position of the slot 22 to be inserted and the insertion position in the slot 22.

  FIG. 4 shows four types of conductor members 30 </ b> A to 30 </ b> D as an example of the plurality of conductor members 30 shown in FIG. 3. The plurality of conductor members 30A to 30D are configured to have a core material inside the coating material. The conductor members 30A to 30D have connection portions 35 at which the core material is exposed at both ends thereof. The conductor members 30A to 30D, for example, remove a part of the coating in the axial direction of the wire to form a coating removal portion on the wire, and cut the wire at the coating removal portion, and then each cut wire Is formed by being bent into a U shape.

  In addition to the connection portion 35, the conductor member 30C has a film removal portion 36 in a part of its axial direction. For example, the conductor member 30C is cut by the film removing unit 36 and further divided into a plurality of conductor members. In the present embodiment, the wire film removal method described below is applied to the wire that is the material of the conductor member 30, and the above-described film removal portion is formed in a part of the wire in the axial direction.

  Next, a wire film removal method according to an embodiment of the present invention will be described.

  As shown in FIG. 5, the wire 40 includes a core material 41 and a coating material 42 that covers the core material 41. As an example, the core member 41 has a rectangular cross section, and has a pair of first side surfaces 51 and a pair of second side surfaces 52. The pair of first side surfaces 51 is a long side surface, and the pair of second side surfaces 52 is a short side surface. In a cross-sectional view of the wire 40, the outer shape of the covering material is similar to the outer shape of the wire 40, and the wire 40 has a rectangular cross section as a whole, like the core 41.

  In order to remove the film of the wire 40 described above, the wire film removal method according to an embodiment of the present invention includes a first film removal step (see FIG. 5), a pressing step (see FIGS. 6 and 7), and And a second film removing step (see FIG. 8).

(First film removal step)
In the first film removal step, a pair of blades 71 are used. In the first film removal step, the positions of the pair of blades 71 are adjusted so that the center line between the pair of blades 71 is positioned on the center line extending in the long side direction of the wire 40. Then, the pair of first side surfaces 51 of the coating material 42 are covered while the pair of blades 71 are moved along the pair of first side surfaces 51 to scrape the surface portions of the pair of first side surfaces 51 with respect to the wire 40. The pair of first coating portions 53 to be removed is removed from the wire 40. When the pair of first coating portions 53 are removed, a core material exposed portion 55 where the core material 41 is exposed is formed in a part of the wire 40 in the axial direction, and the two surfaces of the core material 41 are passed through the core material exposed portion 55. Will be exposed.

  Here, in the first film removal step, the pair of blades 71 are moved to scrape the surface portions of the pair of first side surfaces 51, so that the pair of blades 71 are in sliding contact with the core material 41, so The force F in the moving direction of the blade 71 acts. For this reason, the recessed part 57 arises in the wire 40 in the one side surface 52 side which is a blade insertion side. FIG. 9 shows the relationship between the depth of the recess 57 and the film removal length. The film removal length corresponds to the length of the core material exposed portion 55 along the axial direction of the wire 40. As shown in FIG. 9, as the film removal length increases, the force acting on the central portion of the recess 57 increases and the depth of the recess 57 increases.

  Moreover, in this 1st film removal process, as shown in FIG. 5, when a pair of blades 71 are in sliding contact with the core member 41, a pair of blades positioned on the side of the second side surface 52 that is the blade-inserted side. A sagging 60 occurs at the edge portion 59. The sagging 60 is a portion where the coating film hangs down by being pulled by the blade 71.

(Pressing process)
Subsequently, as shown in FIG. 6 and FIG. 7, in the pressing step, the wire 40 is pressed from the other second side surface 52 that is the blade removal side so that the depth of the concave portion 57 is reduced. . Specifically, in this pressing step, a pressing punch 73 and a support punch 74 shown in FIG. 10 are used.

  The pressing punch 73 has a convex portion 78. As an example, the convex portion 78 is formed in a circular arc shape (convex curved surface shape). The pressing punch 73 has the same width W1 as the above-described core material exposed portion 55. The pressing punch 73 has a pressing surface 79 against the wire 40, and chamfered portions 80 are formed at corners on both sides of the pressing surface 79 in the lateral width direction.

  The support punch 74 has a convex portion 77 having the same shape and the same size as the convex portion 78 of the pressing punch 73 described above. The height of the convex portion 77 is set to about 50 to 60% of the depth of the concave portion 57 described above, and the curvature radius of the convex portion 77 is set smaller than the curvature radius of the concave portion 57. A width W2 of the support punch 74 is set wider than the above-described core material exposed portion 55. The portions on the both sides in the width direction of the convex portion 77 in the support punch 74 are formed as support portions 81 that support the wire 40 on both sides in the width direction of the core material exposed portion 55.

  In the pressing step, first, as shown in FIG. 6, the convex portion 77 of the support punch 74 is inserted inside the concave portion 57, and the core material exposed portion 55 of the wire 40 is supported by the support portion 81 of the support punch 74. Supports both sides in the width direction. At this time, the support punch 74 is positioned so that the convex portion 77 of the support punch 74 is positioned at the center in the width direction of the concave portion 57. Similarly, the pressing punch 73 is positioned so that the convex portion 78 of the pressing punch 73 is also positioned at the center in the width direction of the concave portion 57.

  Subsequently, as shown in FIG. 7, the convex portion 78 of the pressing punch 73 is pressed against the wire 40 from the side opposite to the support punch 74 sandwiching the wire 40, that is, the other second side surface 52 side that is the blade removal side. Then, the wire rod 40 is pressed. Thereby, the concave portion 58 is formed in the wire 40 also on the other second side surface 52 side, the wire rod 40 is pushed into the original concave portion 57 side, the concave portion 57 is corrected, and the depth of the concave portion 57 is reduced. Become.

  Further, in this pressing step, the pair of chamfered portions 80 on both sides bite into the wire 40, whereby the pressing punch 73 is positioned in the axial direction of the wire 40 with respect to the recess 57, and from the other second side surface 52 side. The wire 40 is pressed toward the center of the recess 57.

  Further, in this pressing step, since the support punch 74 having the convex portion 77 having the same shape and the same size as the convex portion 78 of the pressing punch 73 is used, the wire 40 is evenly distributed from both sides by the pressing punch 73 and the supporting punch 74. Pressed. Thereby, the depth of the recessed parts 57 and 58 formed in the both sides of the wire 40 is equalized.

  In this pressing step, the wire 40 is moved by moving the pressing punch 73 and the support punch 74 evenly so that the center line between the press punch 73 and the support punch 74 is maintained on the center axis of the wire 40. Press. For this reason, the pair of recesses 57 and 58 are formed symmetrically about the central axis of the wire 40. Further, when the support punch 74 is pressed by the pressing punch 73 and the support punch 74, the support portion 81 formed on the support punch 74 supports both sides of the core material exposed portion 55 in the lateral width direction of the wire material 40. Is suppressed.

  After the press punch 73 and the support punch 74 have been processed, the press punch 73 and the support punch 74 are separated from the wire 40.

(Second film removal step)
Next, in the second coating removal step, as shown in FIG. 8, a pair of blades 72 similar to the pair of blades 71 used in the first coating removal step described above are used. In this second coating removal step, the position of the pair of blades 72 is adjusted so that the center line between the pair of blades 72 is located on the center line extending in the short side direction of the wire 40.

  Then, the pair of second surfaces covering the pair of second side surfaces 52 of the coating material 42 while the pair of blades 72 are moved along the pair of second side surfaces 52 and the surface portions of the pair of second side surfaces 52 are shaved. The coating part 54 is removed from the wire 40. When the pair of second coating portions 54 are removed, a coating removal portion 56 is formed on the wire 40, and the four surfaces of the core material 41 are exposed through the coating removal portion 56. In the second film removal step, the center line between the pair of blades 72 is positioned on the center line extending in the short side direction of the wire 40, so the center line of the film removal portion 56 is positioned on the center axis of the wire 40. The film removal part 56 is formed in the state.

  In addition, as FIG. 11 shows, in the above-mentioned press process, the correction of the recessed part 57 may be a little insufficient. In this case, in the second film removing step, the positions of the pair of blades 72 are adjusted so that the center line between the pair of blades 72 is displaced from the center axis of the wire 40. In FIG. 11, the center line between the pair of blades 72 is shifted from the center axis of the wire 40 by the dimension A. Then, the positions of the pair of blades 72 are adjusted in this way, and the pair of second coating portions 54 are removed from the wire 40. In this case, since the center line between the pair of blades 72 is deviated from the central axis of the wire 40, the film removal unit 56 is in a state where the center line of the film removal unit 56 is deviated from the central axis of the wire 40 by the dimension A. 56 is formed.

  Next, the operation and effect of one embodiment of the present invention will be described.

  First, in order to clarify the operation and effect of the embodiment of the present invention, a comparative example will be described. FIG. 14 shows a wire film removal method according to a comparative example. In the wire film removal method according to this comparative example, the pressing step is omitted with respect to the wire film removal method according to the above-described embodiment of the present invention.

  That is, in the wire film removal method according to this comparative example, in the first film removal step, the pair of blades 71 are moved along the pair of first side surfaces 51 while the surface portions of the pair of first side surfaces 51 are being shaved. The pair of first coating portions 53 that cover the pair of first side surfaces 51 are removed from the wire 40. Thereafter, in the second coating step, the pair of blades 72 are moved along the pair of second side surfaces 52 to scrape the surface portions of the pair of second side surfaces 52 while the pair of first side surfaces covering the pair of second side surfaces 52. The two coating portions 54 are removed from the wire 40.

  Even in the wire film removal method according to this comparative example, the pair of blades 71 are in sliding contact with the core member 41 because the pair of blades 71 are moved in the first film removal step to cut the surface portions of the pair of first side surfaces 51. As a result, a force F in the moving direction of the blade 71 acts on the core member 41. For this reason, the recessed part 57 arises in the wire 40 in the one side surface 52 side which is a blade insertion side. In the wire film removal method according to this comparative example, the pair of second side surfaces 52 is formed in a state where the removal thickness is larger than the depth of the recess 57 so as not to leave a film in the second film removal step. The surface part of is shaved.

  However, if the surface portions of the pair of second side surfaces 52 are cut in a state where the removal thickness is larger than the depth of the recess 57 as described above, the amount of cutting of the core material 41 increases, and the cross-sectional area of the core material 41 increases. Get smaller. When the cross-sectional area of the core material 41 is small, the electrical resistance of the core material 41 increases and the weld strength decreases. Since the film thickness and the removal thickness hardly depend on the size of the wire diameter, this influence increases as the wire diameter decreases.

  In the wire film removal method according to the comparative example, in the first film removal step, the sag 60 (pulled by the blade) is applied to the pair of edge portions 59 located on the side of the second side surface 52 on the blade insertion side. The part where the film sags) occurs. In the wire film removal method according to this comparative example, the surface portions of the pair of second side surfaces 52 are cut in a state where the sag 60 is generated in the pair of edge portions 59.

  However, if the surface portions of the pair of second side surfaces 52 are scraped in a state where the pair of edge portions 59 are sag in this manner, the coating may remain on the pair of edge portions 59. In order to remove this coating, it is necessary to chamfer the pair of edge portions 59. However, if this is done, the processing man-hours and capital investment increase, resulting in an increase in cost.

  As described above, in the method for removing the coating film of the wire material according to the comparative example, the amount of cutting of the core material 41 increases, the cross-sectional area of the core material 41 decreases, and the processing man-hours and capital investment increase, resulting in an increase in cost. There are challenges.

  On the other hand, according to the wire film removal method according to one embodiment of the present invention, after the first film removal step, the pressing step shown in FIGS. 6 and 7 is performed. The wire 40 is pressed from the other second side surface 52 side which is the withdrawal side to correct the concave portion 57 and reduce the depth of the concave portion 57. Therefore, as shown in FIG. 8, in the subsequent second coating removal step, when the pair of second coating portions 54 is removed from the wire 40 while the surface portions of the pair of second side surfaces 52 are being shaved, the removal thickness Therefore, an increase in the amount of shaving of the core material 41 can be prevented, and the cross-sectional area of the core material 41 can be ensured.

  Moreover, according to the film removal method of the wire which concerns on one Embodiment of this invention, in a 1st film removal process shown by FIG. 5, a pair of edge located in the one 2nd side surface 52 side which is a blade entering side A sagging 60 (portion where the coating film hangs down by being pulled by the blade) occurs in the portion 59, but in the subsequent pressing step, the wire rod 40 is pressed from the other second side surface 52 side which is the blade pulling side. 60 can be reduced. As a result, since the chamfering of the pair of edge portions 59 is not required, an increase in processing man-hours and capital investment can be prevented, and the cost can be reduced.

  Thus, according to the method for removing a coating film of a wire according to an embodiment of the present invention, an increase in the amount of cutting of the core material 41 can be prevented, the cross-sectional area of the core material 41 can be ensured, and the processing man-hours and The increase in capital investment can be prevented and the cost can be reduced.

  In addition, according to the wire film removal method according to the embodiment of the present invention, in the pressing step shown in FIGS. 6 and 7, the protrusions 78 of the pressing punch 73 are pressed against the wire 40 to press the wire 40. The wire 40 can be locally pressed from the side opposite to the recess 57. Thereby, the recessed part 57 can be corrected more appropriately.

  Further, in the pressing step, as shown in FIG. 7, a pressing punch 73 having the same width W <b> 1 as the core material exposed portion 55 formed on the wire 40 is used by removing the pair of first coating portions 53. Therefore, the wire 40 can be pressed locally within the same width range as the core material exposed portion 55. Thereby, it can suppress that a stress acts on parts other than the recessed part 57, and can correct the recessed part 57 still more exactly.

  Further, in the pressing step, a pressing punch 73 in which corner portions on both sides in the width direction of the pressing surface 79 against the wire 40 are chamfered portions 80 is used. Accordingly, the pair of chamfered portions 80 on both sides bite into the wire 40, whereby the pressing punch 73 is positioned in the axial direction of the wire 40 with respect to the recess 57, and the central portion of the recess 57 from the other second side surface 52 side. Since the wire 40 can be pressed toward the front, the concave portion 57 can be corrected efficiently.

  Further, in the pressing step, the support punch 74 having the convex portion 77 having the same shape and the same size as the convex portion 78 of the pressing punch 73 is used, so the wire rod 40 is pressed evenly from both sides by the pressing punch 73 and the supporting punch 74. it can. Therefore, the depths of the recesses 57 and 58 formed on both sides of the wire 40 can be made uniform. Thereby, in a subsequent 2nd film removal process, a pair of 2nd film part 54 can be removed by the uniform removal thickness centering on the center axis line of the wire 40. FIG. As a result, the film removal part 56 from which the first film part 53 and the second film part 54 have been removed can be formed coaxially with the central axis of the wire 40.

  As shown in FIG. 11, when the correction of the recess 57 is slightly insufficient, the positions of the pair of blades 72 are adjusted so that the center line between the pair of blades 72 is displaced from the center axis of the wire 40. Then, the pair of second coating portions 54 may be removed from the wire 40. In this way, the film removal unit 56 is formed in a state where the center line of the film removal unit 56 is deviated from the center axis of the wire 40, but a reduction in the cross-sectional area of the core material 41 can be suppressed.

  Next, a modification of one embodiment of the present invention will be described.

  In the above embodiment, the method for removing the coating film of the wire is applied to the wire that is the material of the conductor member 30, but may be applied to the wire that is the material of the other member.

  Moreover, in the said embodiment, although the film removal method of a wire is applied to the wire which has a cross-sectional rectangular core material, you may apply to the wire which has a cross-sectional square-shaped core material.

  Moreover, in the said embodiment, although the convex parts 78 and 78 of the press punch 73 and the support punch 74 are all formed in the cross-sectional arc shape (convex curved surface shape), as shown in FIG. A trapezoidal tapered shape may be used.

  Moreover, in the said embodiment, although the press punch 73 is pressed against the wire 40 in the state which supported the wire 40 with the support punch 74 in the press process shown by FIG. 6, FIG. You may press against the wire 40 simultaneously.

  Moreover, in the said embodiment, although the support punch 74 which has the convex part 78 inserted in the recessed part 57 is used in the press process, for example instead of the support punch 74 as shown in FIG. The support member 84 that does not have the convex portion 78 may be used. And like the support part 81 of the press punch 73 described above, the support member 84 may support the wire 40 on both sides of the film removal part 56 in the lateral width direction.

  Moreover, in the said embodiment, although the pair of blades 72 different from the pair of blades 71 used in the first film removal step shown in FIG. 5 are used in the second film removal step shown in FIG. For example, in the case where the dimension between the pair of blades 71 used in the first film removal step and the relative orientation of the pair of blades 71 with respect to the wire 40 can be changed, The pair of blades 71 used in the first film removal step may be used, and the second film portion 54 may be removed with the pair of blades 71.

  When separate blades are used in the first coating removal step and the second coating removal step, each step can be executed substantially continuously, so that rapid coating removal processing can be performed. On the other hand, when it is possible to allow a sufficient processing time, the coating removal processing can be performed with a small number of blades by using a common blade in the first coating removal step and the second coating removal step. Can do.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and other various modifications can be made without departing from the spirit of the present invention. It is.

DESCRIPTION OF SYMBOLS 10 ... Rotary electric machine, 11 ... Shaft, 12 ... Rotor, 13 ... Stator, 14, 15 ... Frame, 16, 17 ... Bearing, 18 ... Rotor core, 19 ... Rotor magnet, 20 ... Stator core, 21 ... Teeth, 22 ... Slot, DESCRIPTION OF SYMBOLS 30 ... Conductor member, 40 ... Wire rod, 41 ... Core material, 42 ... Coating material, 51 ... First side surface, 52 ... Second side surface, 53 ... First coating portion, 54 ... Second coating portion, 55 ... Core material exposure Part 56, film removal part 57, 58 concave part 59 edge part 71 72 blade 73 punch punch 74 support punch 77 78 convex part 79 pressing face 80 chamfering Part, 81 ... support part, 84 ... support member

Claims (5)

Surfaces of the pair of first side surfaces by moving a pair of blades along a pair of first side surfaces of the core material with respect to a wire having a quadrangular cross-section core material and a coating material covering the core material A first coating removal step of removing a pair of first coating portions covering the pair of first side surfaces of the coating material from the wire while scraping a portion;
The depth of the concave portion generated in the wire on the second side surface of the pair of second side surfaces of the core material as the surface portions of the pair of first side surfaces are shaved in the first coating removal step. The pressing step of pressing the wire from the other second side of the pair of second side surfaces,
A pair of second coating portions covering the pair of second side surfaces of the coating material while moving the pair of blades along the pair of second side surfaces and scraping the surface portions of the pair of second side surfaces. A second coating removal step to remove from the wire,
A method for removing the coating film of the wire. In the pressing step, the convex portion of the pressing punch is pressed against the wire to press the wire.
The wire film removal method according to claim 1. As the pressing punch, a pressing punch having the same width as the core material exposed portion formed on the wire by removing the pair of first coating portions is used.
The wire film removal method according to claim 2. As the pressing punch, use a pressing punch in which the corners on both sides in the width direction of the pressing surface to the wire are chamfered portions,
The wire film removal method according to claim 3. In the pressing step, a support punch having a convex part having the same shape and size as the convex part of the pressing punch is used, and the convex part of the support punch is inserted inside the concave part.
The method for removing a coating film of a wire according to any one of claims 2 to 4.