JP2014018043A - Molding method for coil element for rotary electric machine and molding apparatus for coil element for rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a molding method for a coil element for a rotary electric machine and a molding apparatus for a coil element for a rotary electric machine that mold a coil element in a shape as designed without damaging a surface.SOLUTION: A molding method for a coil element for a rotary electric machine includes: an S-shape molding step S1 of forming an S-shaped part 13 in a substantially S shape on a first plane P1 at a substantially center part of a linear wire material 21 for a coil; a first bending step S2 and a second bending step S3 of bending leg parts 14 and 15 more on both end sides than the S-shaped part 13 in mutually approaching directions; and a mountain shape molding step S4 of molding a mountain-shaped part 11 including the S-shaped part 13 as a substantial top part.

Description

  The present invention relates to a method for forming a substantially U-shaped coil element for a rotating electrical machine, which is inserted into each slot of a stator core of a rotating electrical machine and forms a stator coil by connecting the end portions thereof, and the coil element for a rotating electrical machine The present invention relates to a molding apparatus.

Conventionally, as a method for forming a coil element for a rotating electrical machine, for example, there is a technique disclosed in Patent Document 1.
In the technique disclosed in Patent Document 1, a coil wire is closed in a mold, a linear wire is formed into a two-dimensional crank wire, and then a three-dimensional shape with the crank portion of the two-dimensional crank wire as a substantial apex. A three-dimensional angle-shaped wire having a chevron shape is formed, and finally, a portion outside the coil end formation region including the apex portion of the three-dimensional angle-shaped wire is bent in the slot insertion direction.
According to this technique, the stress applied to the coil wire when it is bent is eliminated from the center to the end of the wire.

Japanese Patent No. 3894004

  However, in the technique disclosed in Patent Document 1, the outer portion of the three-dimensional chevron-shaped three-dimensional chevron-shaped wire rod is bent toward the slot insertion direction. For this reason, the bending stress of the outer portion is transmitted to the three-dimensional chevron shape at the center of the wire, and the three-dimensional chevron shape collapses, making it difficult to form the coil element into the designed shape. If the coil element cannot be formed into the designed shape, the coil element may not be inserted into the slot of the stator core of the rotating electrical machine, or even if it can be inserted, the density of the coil elements may be reduced.

  Moreover, in the said technique, since a wire is shape | molded by closing a mold to a metal mold | die, when closing a wire material to a metal mold | die, the surface of a coil element may be damaged. Damage to the surface of the coil element destroys the insulating layer covering the surface of the coil element and causes an unintended short circuit.

  The present invention is for solving the above-mentioned problems, and an object of the present invention is to form a coil element for a rotating electrical machine that forms the coil element into a designed shape without damaging the surface, and to form the coil element for a rotating electrical machine. To provide an apparatus.

(1) Coil for rotating electrical machine that is inserted into each slot (for example, slot 2 to be described later) of a stator core (for example, stator core 3 to be described later) of the rotating electrical machine, and forms a stator coil by connecting the end portions thereof. A method for forming an element (for example, coil element 1 described later),
An S-shaped portion (e.g., substantially S-shaped on a first plane (e.g., first plane P <b> 1 described later) on a substantially central portion of a linear coil wire (e.g., coil wire 21 described later) An S-shaped forming step (for example, an S-shaped forming step S1 described later) for forming an S-shaped portion 13 described later;
Bending step (for example, first bending step S2 and second bending step described later) for bending both ends (for example, leg portions 12, 14, and 15 described later) closer to each other than the S-shaped portion. Step S3),
A second flat surface (for example, a second flat surface P2 to be described later) intersecting the first plane is formed into a mountain shape (for example, a circular shape portion 11 to be described later) having the S-shaped portion as a substantially apex portion. A method for forming a coil element for a rotating electrical machine, comprising: a mountain forming step (for example, a mountain forming step S4 described later).

According to the invention of (1), since the S-shaped portion is finally formed into a mountain shape with the substantially apex portion, both end portions have been bent. Therefore, since the bending stress at the time of bending both ends is not transmitted to the chevron shape, the chevron shape is not broken. Therefore, the coil element can be formed into a shape as designed, and the coil element can be reliably inserted into the slot of the stator core of the rotating electric machine, and the density of the plurality of coil elements when inserted and aligned multiple times. Does not drop.
Further, since the coil element can be formed using a jig that contacts only the bent portion of the coil wire without using a mold, the coil element can be formed without damaging the surface.

  (2) The method for forming a coil element for a rotating electrical machine according to (1), wherein the mountain forming step is formed into the mountain shape by bending a substantially central portion of the S-shaped portion while twisting. .

  According to the invention of (2), it is finally possible to bend without twisting the coil wire until it is bent while twisting the substantially central portion of the S-shaped portion. Therefore, the wire is not easily deformed by twisting the coil wire. Therefore, the coil element can be formed into a designed shape.

(3) The bending molding step includes:
A first bending step (for example, first bending step S2 described later) for bending the both end sides along the first plane;
The both ends are bent in directions close to each other along a third plane (for example, a third plane P3 described later) and a fourth plane (for example, a fourth plane P4 described later) intersecting with the first plane. A method for forming a coil element for a rotating electrical machine according to claim 1 or 2, further comprising a second bending step (for example, a second bending step S3 described later).

  According to the invention of (3), the folding forming step includes two steps, and the both ends are bent, so that the bending directions on both ends are changed to the first plane and the other third plane and the fourth plane. It can be easily bent separately and the stress applied to the coil wire is reduced.

  (4) In any one of (1) to (3), the S-shaped forming step, the bending forming step, and the mountain forming step are performed in a state in which the coil wire material is bundled. A method for forming a coil element for a rotating electrical machine as described.

According to the invention of (4), since a plurality of coil wires are bundled and simultaneously formed, the coil elements formed into a plurality of bundles can be formed into a shape that is closely adjacent to each other. Can increase the degree of congestion.
Further, a plurality of coil wire rods can be simultaneously formed into a bundle to increase productivity.

(5) Coil for rotating electrical machine that is inserted into each slot (for example, slot 2 to be described later) of a stator core (for example, stator core 3 to be described later) of the rotating electrical machine, and forms a stator coil by connecting the end portions thereof. A device for forming an element (for example, coil element 1 described later),
An S-shaped portion (for example, described later) that is formed in a substantially central portion of a coil wire (for example, a coil wire 21 to be described later) and has a substantially S shape on a first plane (for example, a first plane P1 to be described later). A first fixing member (for example, a first fixing member 201 described later) and a second fixing member (for example, a second fixing member 202 described later),
The second fixing member is configured to be rotatable around a rotation shaft (for example, a rotation shaft 203 described later) on the first plane provided between the first fixing member and the second fixing member.
A coil element for a rotating electrical machine, wherein a gap (for example, a gap 204 described later) inclined with respect to the rotation shaft is formed between the first fixing member and the second fixing member. Molding equipment.

  According to the invention of (5), when the second fixing member is rotated to form the mountain shape, the substantially central portion of the S-shaped portion of the coil wire is twisted. At this time, the gap formed between the first fixing member and the second fixing member allows torsion of the substantially central part of the S-shaped part, and the substantially central part of the twisted S-shaped part is the first fixing member. In addition, it is possible to avoid the contact with the second fixing member, reduce the stress at the substantially central portion of the twisted S-shaped portion, and form the chevron shape without damaging the surface.

  (6) The inclination direction of the gap with respect to the rotation axis is orthogonal to the extending direction of a substantially central portion (for example, a straight portion described later) of the S-shaped portion (5). Forming apparatus for coil elements for rotating electrical machines.

  According to the invention of (6), since the inclination direction of the gap with respect to the rotation axis is orthogonal to the extending direction of the substantially central portion of the S-shaped portion, the twist of the substantially central portion of the S-shaped portion is allowed. Easy, especially when multiple wire bundles for coils are formed at the same time, since the gap crosses the approximate center of the S-shaped part of the wire bundles, it is possible to twist all the wires of the bundle simultaneously can do.

  ADVANTAGE OF THE INVENTION According to this invention, the shaping | molding method of the coil element for rotary electric machines and the shaping | molding apparatus of the coil element for rotary electric machines which shape a coil element in the shape as designed without damaging the surface can be provided.

It is a perspective view which shows the coil element which concerns on embodiment of this invention. It is a perspective view which shows the insertion state to the slot of the coil element which concerns on the said embodiment. It is process drawing which shows the shaping | molding method of the coil element which concerns on the said embodiment. It is a figure explaining the S character formation step concerning the above-mentioned embodiment. It is a figure explaining the 1st bending shaping | molding step which concerns on the said embodiment. It is a figure explaining the 2nd bending shaping | molding step which concerns on the said embodiment. It is a figure explaining the 2nd bending shaping | molding step which concerns on the said embodiment. It is a figure explaining the mountain formation type | mold step which concerns on the said embodiment.

  Embodiments of the present invention will be described below with reference to the drawings.

First, the coil element 1 according to the present embodiment will be described.
FIG. 1 is a perspective view showing a coil element 1 according to the present embodiment.
The coil element 1 for rotating electrical machines shown in FIG. 1 is bundled, inserted into the slot 2 of the stator core 3 of the rotating electrical machine, and the end portions thereof are connected to form a stator coil.
The coil element 1 is U-shaped using a flat wire, and includes a mountain-shaped portion 11 and leg portions 12.

The chevron-shaped portion 11 has a substantially apex portion that twists, protrudes from the slot 2 at the end face portion of the stator core 3, and constitutes a coil end portion (crossover portion) extending from a predetermined slot 2 to another slot 2.
In the chevron-shaped portion 11, the coil elements 1 are twisted while the parallel state of the four bundles are closely in contact with each other, and the coil elements are closely adjacent to each other even if they have twisted portions.

The leg portions 12 are straight and extend in parallel with each other from both end portions of the mountain-shaped portion 11 and are inserted into the slots 2.
The leg portions 12 have four coil elements 1 in a parallel state with no gaps, the coil elements are closely adjacent to each other, and the pair of leg portions 12 face the wire plane 12a.

Next, the insertion state of the coil element 1 into the slot 2 will be described.
FIG. 2 is a perspective view showing a state in which the coil element 1 according to the present embodiment is inserted into the slot 2.
As shown in FIG. 2, the coil element 1 has four bundles, one leg 12 is inserted into the slot 2 having a long groove in the same radial direction, and the other leg 12 of the other four bundles of coil elements 1. Are inserted into the same slot 2 and are arranged in an annular shape so that the chevron-shaped portions 11 overlap without interference. Since the chevron-shaped portions 11 are circularly arranged so as to overlap each other without interference, the coil elements are closely adjacent to each other, the height of the coil end portion is reduced, and the axial and radial dimensions of the rotating electrical machine are reduced. ing.

Next, a method for forming the coil element 1 according to this embodiment will be described.
FIG. 3 is a process diagram showing a method for forming the coil element 1 according to the present embodiment.
As shown in FIG. 3, the method of forming the coil element 1 includes an S-shaped forming step S1, a first folding forming step S2, a second bending forming step S3, and a mountain forming step S4.

  First, a flat wire rod of enameled copper wire is cut into a predetermined length, a predetermined portion of the film is peeled off, and four linear coil wire rods 21 having different lengths are prepared.

(S-shaped molding step)
FIG. 4 is a diagram for explaining the S-shaped forming step S1 according to the present embodiment.
In the S-shaped forming step S1, the S-shaped forming jig 100 is used, and the S-shaped exhibiting a substantially S-shape on the first plane P1 parallel to the paper surface of FIG. The shape part 13 (refer FIG.4 (c)) is shape | molded.

As shown in FIG. 4, the S-shaped forming jig 100 is a pedestal having a flat first plane P <b> 1, and a first leg bending groove 101 and a second leg bending groove that are recessed in the center direction on both sides. 102.
The S-shaped forming jig 100 includes a first guide 103 and a second guide 104 arranged on the first plane P1, and a positioning pin 105, a third guide 106, and a first frame arranged on the first plane P1 from above. 107, a second frame 108, a third frame 109, a fourth frame 110, and first and second clamps 111 and 112.

In the S-shaped forming step S1, first, the linear coil wire 21 is placed on the S-shaped forming jig 100 having the first plane P1, and the wire planes of the respective wires come into contact with the first plane P1, and the lengths thereof are stepwise different. The four bundles are arranged in parallel (parallel state).
As shown in FIG. 4A, the first guide 103 disposed on the first plane P1 of the S-shaped forming jig 100 at a position on the right side of the center portion in the figure of the four bundles of coil wire 21 and The second guide 104 is sandwiched so that the parallel state of the four bundles does not collapse, and the four bundles of coil wire 21 are positioned on the S-shaped forming jig 100.

Next, as shown in FIG. 4 (b), the point A on the first guide 103 is centered with respect to the four bundles of coil wires 21 sandwiched between the first guide 103 and the second guide 104. Then, the first piece 107 arranged from the upper side on the second guide 104 side is rotated along the first plane P1 so that the released side of the coil wire 21 is bent by θ1 on the first guide 103 side. Let Thereby, the four coil wires 21 are simultaneously bent into a substantially L-shape.
The first guide 103 is provided with an R in a range where it comes into contact with the bent portion so as not to damage the coil wire 21 that is bent into a substantially L shape.

Next, as shown in FIG. 4C, a cylindrical positioning pin 105 is arranged at a point B with respect to the coil wire 21 in a parallel state bent into a substantially L shape, and the positioning pin 105 is centered. Then, the second piece 108 arranged on the first guide 103 side from above is rotated so that the side of the coil wire 21 bent into a substantially L-shape is bent along the first plane P1 by θ2. As a result, the four coil wires 21 are simultaneously bent into a substantially S shape.
An S-shaped portion 13 having a substantially S shape on the first plane P1 is formed at a substantially central portion of the coil wire 21 shown in FIG.

(First bending step)
FIG. 5 is a view for explaining the first bending step S2 according to the present embodiment.
In the first bend forming step S2, first, as shown in FIG. 5, the coil wire 21 in a parallel state in which the S-shaped portion 13 is formed is placed on the S-shaped forming jig 100, and the third The frame 109 and the fourth frame 110 are arranged from above.

  Next, as shown in FIG. 5, with respect to the coil wire 21 in the parallel state, the third frame arranged from the upper side on the first guide 103 side with the point C on the second guide 104 side as the center. 109, the leg 14 on one end side is rotated by θ3 along the first plane P1. As a result, the four leg portions 14 of the coil wire 21 are simultaneously bent so as to be positioned on the first leg bending groove 101 of the S-shaped forming jig 100.

Next, as shown in FIG. 5, with respect to the coil wire 21 in a parallel state in which one leg 14 is positioned on the first leg bending groove 101, the point D on the first guide 103 side is the center. Then, the fourth frame 110 arranged on the second guide 104 side from above is rotated so that the leg portion 15 on the other end side moves along the first plane P1 by θ4. Thereby, the other leg portion 15 of the coil wire 21 is bent at the same time so as to be positioned on the second leg bending groove 102 of the S-shaped forming jig 100.
By passing through the angle adjustment of both leg parts 14 and 15 by 1st bending shaping | molding step S2, between the both leg parts 14 and 15 makes the angle of (theta) 5.

(Second bending step)
6 and 7 are diagrams for explaining the second bending step S3 according to the present embodiment.
In the second bending step S3, as shown in FIGS. 6 and 7, the U-shaped first clamp is formed by leaving the S-shaped portion 13 on the first plane P1 and being lowered from above by an air cylinder (not shown). 111 is inserted into the first leg bending groove 101 across one leg 14 in a parallel state on the first leg bending groove 101.
At the same time, the U-shaped second clamp 112 lowered from above by an air cylinder (not shown) extends across the other leg 15 in the parallel state on the second leg bending groove 102, and the second leg Insert into the bending groove 102.
The first and second clamps 111 and 112 constrain both the leg portions 14 and 15 of the coil wire 21, and the both leg portions 14 and 15 are bent in the width direction (first and second leg bending at the time of the second bending step). Swelling in the groove width direction of the working grooves 101 and 102 is restricted.

Then, as shown in FIG. 7, the first leg 111 centered on the edge 101 a of the first leg bending groove 101 while pressing one leg 14 of the coil wire 21 from above, with the first leg 111. One leg part 14 located on the part bending groove 101 is simultaneously bent by θ6 in the first leg part bending groove 101 along the third plane P3 substantially orthogonal to the first plane P1.
Further, while pressing the other leg portion 15 of the coil wire 21 from above by the second clamp 112, the edge portion 102 a of the second leg bending groove 102 is centered on the second leg bending groove 102. The other leg portions 15 positioned are bent simultaneously by θ7 in the second leg bending groove 102 along the fourth plane P4 substantially orthogonal to the first plane P1.

In the second bending step S3, the leg portions 14 and 15 are placed on the S-shaped forming jig 100 in the first leg bending groove 101 and the second leg bending groove 102, not shown. This is done by pushing and bending each with a frame driven by.
After completion of the bending in the second bending step S3, the first and second clamps 111 and 112 are pulled upward by the air cylinder, and the both leg portions 14 and 15 of the coil wire 21 by the first and second clamps 111 and 112 are lifted. Remove restrictions.

  By passing through the second bending step S3, the coil wire 21 is bent in the direction in which the leg portions 14 and 15 are close to each other for the first time in a direction other than the first plane P1, and the legs are in a parallel state without twisting. The parts 14 and 15 form a letter C.

(Mountain forming step)
FIG. 8 is a diagram for explaining the mountain formation step S4 according to the present embodiment.
The mountain forming step S4 uses the mountain forming jig 200 to form the mountain shaped portion 11 having the S-shaped portion 13 as a substantially apex portion.

As shown in FIG. 8, the mountain forming jig 200 includes a first fixing member 201 and a second fixing member 202.
The first fixing member 201 is a member fixed on the first plane P1.
The second fixing member 202 moves from the open state on the first plane P1 to the first fixing member 201 side with the rotation shaft 203 on the first plane P1 provided between the second fixing member 202 and the first fixing member 201 as a center. It is configured to be rotatable so as to be closed only by θ8 (see FIG. 8C).

  A gap 204 that is inclined with respect to the rotation shaft 203 is formed between the first fixing member 201 and the second fixing member 202. When the coil wire 21 is disposed on the first fixing member 201 and the second fixing member 202 that are open on the first plane P <b> 1, the gap 204 is an extension of the linear portion 13 a at the substantially central portion of the S-shaped portion 13. It is orthogonal to the direction and crosses the straight portion 13 a of the S-shaped portion 13 of the four bundles of coil wire 21.

The first fixing member 201 includes a first pressing member 205 (see FIG. 8B) that holds the S-shaped portion 13 between the first fixing member 201 and the second fixing member 202 includes an S-shaped portion. And a second pressing member 206 (see FIG. 8B) that presses 13 with the second fixing member 202 interposed therebetween.
The first fixing member 201 and the second fixing member 202 have recesses 207 and 208 corresponding to the S-shaped portion 13 into which the S-shaped portion 13 is fitted on the open first plane P1.

In the mountain forming step S4, first, as shown in FIG. 8A, the S-shaped portion 13 of the coil wire 21 that has undergone the second bending step S3 is opened on the first plane P1. 201 and the second fixing member 202 are fitted into the recesses 207 and 208 corresponding to the S-shaped portion 13.
In the coil wire 21 fitted in the recesses 207 and 208, the extending direction of the straight portion 13 a of the S-shaped portion 13 is orthogonal to the gap 204, and the straight portion 13 a straddles the gap 204. And both the leg parts 14 and 15 will be in the state open | released in the diagonally upward direction, respectively.

Next, as shown in FIG. 8B, the S-shaped portion 13 is pressed and fixed from above the first plane P <b> 1 by the first pressing member 205 and the second pressing member 206.
Since the first pressing member 205 and the second pressing member 206 press only the S-shaped portion 13 of the coil wire 21, both the leg portions 14 and 15 are maintained in a state of being released obliquely upward.

Then, as shown in FIG. 8C, the second fixing member 202 is moved by θ8 along the second plane P2 substantially orthogonal to the first plane P1 around the rotation axis on the first plane P1. The legs 14 and 15 are rotated in the direction in which the legs 14 and 15 approach each other. As a result, four chevron-shaped portions 11 having the S-shaped portion 13 as a substantially apex portion are simultaneously formed on the coil wire 21.
At this time, since the linear portion 13a at the substantially central portion of the S-shaped portion 13 is inclined to the rotation shaft 203, the parallel state of the four bundles is twisted while closely shifting. This twist increases the occupied volume of the four bundles of coil wire 21, but is allowed in the gap 204 between the first fixing member 201 and the second fixing member 202, and is substantially at the center of the S-shaped portion 13 that is twisted. The portion does not contact the first fixing member 201 and the second fixing member 202.
Moreover, since the 1st fixing member 201 and the 2nd fixing member 202 are fixing only the S-shaped part 13 with the 1st pressing member 205 and the 2nd pressing member 206, the stress at the time of shape | molding the mountain-shaped part 11 Does not affect the legs 14 and 15 in the released state, and the legs 14 and 15 are not deformed. Thereby, neither the shape of the mountain-shaped part 11 nor both the leg parts 14 and 15 collapse | crumbles, but the coil element 1 can be shape | molded in the shape as designed.
The coil wire rod 21 formed from the mountain-shaped portion 11 removed from the mountain-shaped jig 200 has the leg portions 14 and 15 parallel to each other, and becomes a substantially U-shaped coil element 1 (see FIG. 1).

  According to the method for forming the coil element 1 according to the present embodiment described above, the following effects are obtained.

(1) Finally, since the mountain-shaped portion 11 is formed with the S-shaped portion 13 as a substantially apex portion, both the leg portions 14 and 15 have been bent. Therefore, since the bending stress at the time of bending both the leg parts 14 and 15 is not transmitted to the mountain-shaped part 11, the mountain-shaped part 11 does not collapse. Therefore, the coil element 1 can be formed into a shape as designed, and the coil element 1 can be surely inserted into the slot 2 of the stator core 3 of the rotating electrical machine. The density of element 1 does not decrease.
In addition, since the coil element 1 is formed using the S-shaped forming jig 100 and the mountain forming jig 200 that contact only the bent portion of the coil wire 21 without using a mold, the coil element is not damaged. 1 can be molded.

  (2) Finally, the linear portion 13a at the substantially central portion of the S-shaped portion 13 can be bent while being twisted, and the coil wire 21 can be processed without twisting until then. Therefore, the wire rod hardly deforms by twisting the coil wire rod 21. Therefore, the coil element 1 can be formed into a designed shape.

  (3) Since both the leg portions 14 and 15 are folded in two steps of the first folding molding step S2 and the second folding molding step S3, the folding direction of the both leg portions 14 and 15 is set to the first plane P1 and the other third. It can be easily bent separately into the plane P3 and the fourth plane P4, and the stress applied to the coil wire 21 is reduced.

(4) Since the coil wire 21 is formed into four bundles and formed simultaneously, the coil elements 1 formed into four bundles can be formed into a shape adjacent to each other, and the coil elements 1 of the four bundles are densely packed. The degree can be increased.
Moreover, the wire rod 21 for coils can be shape | molded simultaneously with four bundles, and productivity can be improved.

  (5) When the mountain-shaped portion 11 is formed by rotating the second fixing member 202, the linear portion 13a at the substantially central portion of the S-shaped portion 13 of the coil wire 21 is twisted. At this time, the gap 204 formed between the first fixing member 201 and the second fixing member 202 allows the straight portion 13a of the S-shaped portion 13 to be twisted, and the straight portion 13a of the S-shaped portion 13 is twisted. Prevents the first fixing member 201 and the second fixing member 202 from coming into contact with each other, reduces the stress of the straight portion 13a of the twisted S-shaped portion 13 and forms the angle-shaped portion 11 without damaging the surface. be able to.

  (6) Since the inclination direction of the gap 204 with respect to the rotation shaft 203 is orthogonal to the extending direction of the straight portion 13a at the substantially central portion of the S-shaped portion 13, the twist of the straight portion 13a of the S-shaped portion 13 In particular, when the coil wire 21 is bundled into four bundles and formed at the same time, the gap 204 crosses the straight portion 13a of the S-shaped portion 13 of the four bundles of coil wire 21. The twisting of all the coil wire rods 21 can be allowed at the same time.

  Note that the present invention is not limited to the above-described embodiment, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the scope of the present invention.

1 ... Coil element (coil element for rotating electrical machine)
DESCRIPTION OF SYMBOLS 21 ... Coil wire 13 ... S-shaped part 13a ... Linear part (substantially center part of S-shaped part)
11 ... Yamagata shape part (yamagata shape)
12, 14, 15 ... leg (both ends)
201 ... first fixing member 202 ... second fixing member 203 ... rotating shaft 204 ... gap P1 ... first plane P2 ... second plane P3 ... third plane P4 ... fourth plane S1 ... S-shaped forming step S2 ... first Folding step (bending step)
S3: Second folding step (folding step)
S4 ... Mountain formation step

Claims (6)

A method of forming a coil element for a rotating electrical machine that is inserted into each slot of a stator core of a rotating electrical machine and forms a stator coil by connecting ends of each other,
An S-shaped forming step of forming an S-shaped portion having a substantially S-shape on the first plane at a substantially central portion of the linear coil wire;
A bending step of bending both end sides of the S-shaped portion in directions close to each other;
Forming a coil element for a rotating electrical machine, comprising: a mountain-shaped step that forms a mountain shape having the S-shaped portion as a substantially apex portion along a second plane intersecting the first plane. .   2. The method of forming a coil element for a rotating electrical machine according to claim 1, wherein the mountain forming step is formed into the mountain shape by bending a substantially central portion of the S-shaped portion while twisting. The bending step includes
A first bending step of bending the both end sides along the first plane;
3. A second bending step of bending the both end portions in directions close to each other along a third plane and a fourth plane intersecting the first plane, respectively. Of forming a coil element for a rotating electrical machine.   4. The rotating electrical machine according to claim 1, wherein the S-shaped forming step, the bending forming step, and the mountain forming step are performed in a state in which the coil wire is bundled. Coil element forming method. An apparatus for forming a coil element for a rotating electrical machine that is inserted into each slot of a stator core of a rotating electrical machine and forms a stator coil by connecting the ends of each,
A first fixing member and a second fixing member, which are formed at a substantially central portion of the coil wire and fix an S-shaped portion having a substantially S-shape on the first plane;
The second fixing member is configured to be rotatable around a rotation axis on the first plane provided between the first fixing member and the first fixing member.
An apparatus for forming a coil element for a rotating electrical machine, wherein a gap inclined with respect to the rotating shaft is formed between the first fixing member and the second fixing member.   6. The apparatus for forming a coil element for a rotating electrical machine according to claim 5, wherein an inclination direction of the gap with respect to the rotating shaft is orthogonal to an extending direction of a substantially central portion of the S-shaped portion.

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