JP6729432B2 - Stator manufacturing equipment - Google Patents

Description

The present invention relates to a stator manufacturing apparatus that welds ends of coil segments of a stator.

Conventionally, various methods are known as a method of forming a coil in a core of a rotating electric machine such as an electric motor or a generator. For example, Patent Document 1 discloses a method of inserting the respective sides of a substantially U-shaped coil segment into different slots of a stator, bending the ends of the U-shaped sides, and further welding the ends of predetermined segments. ing.

JP-A-2000-350422

However, if there is a step between the tips of the coil segments during welding, welding failure may occur.
The present invention was created in view of the above problems, and an object thereof is to provide an apparatus for manufacturing a stator that does not cause a step at the tip of the coil segment of the stator.

A U-shaped coil segment (16) inserted into the slot (12) of the stator core (11) of the stator (10), wherein the coil tip portion protruding from the end of the stator core is the stator. There is an inner end pair (18) on the radially inner side and an outer end pair (19) on the outer side.
Along the axial direction of the stator, the direction in which the coil tip is located is the upward direction and the opposite direction is the downward direction.The radial direction of the stator is the radial inner side and the opposite direction is the direction toward the central axis. Radially outward.
A stator manufacturing device (30) used in the process of manufacturing a coil by welding an inner end pair and an outer end pair is held by a fixing jig (110) above a coil tip portion of a stator core. A fixed plate (34) and a cylinder provided between the outer end pair and the inner end pair, the outer surface sloping inward in the radial direction on the radially outer lower side surface. An intermediate layer jig (33) having an inclined surface (331) and an inner inclined surface (332) that inclines radially outward as it goes downward is provided on the radially inner lower side surface.
The stator manufacturing device also has a first inclined surface (313) on the lower side surface on the radially inner side that inclines radially outward as it goes downward, and is provided on the radially outer side of the outer end pair. , A first straightening jig that is movable inward in the radial direction relative to the fixed plate, and that can hold the outer end pair with the intermediate layer jig to make the height of the tip end the same ( 31).
The stator manufacturing device further has a second inclined surface (323) on the radially outer lower surface, which inclines radially inward as it goes downward, and is provided radially inward of the inner end pair. , A second straightening jig that can move radially outward relative to the fixed plate, and that can sandwich the inner end pair with the intermediate layer jig to make the height of the tip end the same ( 32).
In the stator manufacturing device, the tips of the U-shaped coil ends can be pushed and aligned from inside and outside in the radial direction to make the heights of the coil ends the same. This reduces the incidence of welding defects.

It is a perspective view which shows the external appearance of a stator. It is an expansion perspective view of the II section in FIG. It is an enlarged view of a coil end portion. It is a perspective view of the manufacturing device of the stator concerning a first embodiment of the present invention. It is a top view of the manufacturing device of the stator concerning a first embodiment of the present invention. It is the VI-VI sectional view taken on the line in FIG. It is an enlarged view of the VII section in FIG. It is the VIII-VIII sectional view taken on the line in FIG. It is sectional drawing of the state which aligned the coil end part of a stator with the manufacturing apparatus of the stator which concerns on 1st embodiment of this invention. FIG. 3 is a plan view showing a state where the coil ends of the stator are aligned with the stator manufacturing apparatus according to the first embodiment of the present invention. It is the XI-XI sectional view taken on the line in FIG. It is an enlarged view of the XII part in FIG. It is an enlarged view of the XIII part in FIG. It is explanatory drawing at the time of aligning the coil end part by another manufacturing apparatus. It is explanatory drawing at the time of aligning the coil end part by another manufacturing apparatus. It is explanatory drawing of the manufacturing apparatus of the stator which concerns on 2nd embodiment of this invention.

Hereinafter, a stator manufacturing apparatus according to the present invention will be described with reference to the drawings. In addition, in the following plural embodiments, the same components are denoted by the same reference numerals, and the description thereof will be omitted.
(First embodiment)
First, an outline of a stator manufactured using the stator manufacturing apparatus according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 3.
FIG. 1 is a perspective view of a stator 10 according to the present invention. FIG. 2 is an enlarged view of the main part of FIG.
The stator 10 has a cylindrical iron core 11. The iron core 11 of the stator is formed by laminating a plurality of steel plates. A plurality of slots 12 are provided along the axial direction on the inner peripheral surface of the iron core 11 of the stator. The winding wire 13 is inserted into the plurality of slots 12. The winding wire 13 forms a coil end group 14 at the end of the stator 10 in the axial direction. Hereinafter, along the axial direction of the stator 10, the direction in which the coil end group 14 is present is referred to as the upward direction, and the opposite direction is referred to as the downward direction. At this time, the downward direction coincides with the gravity direction. The radial direction of the stator 10 toward the central axis is the radial inside, and the opposite direction is the radial outside. An insulating sheet 15 is sandwiched between each slot 12 and the stator winding 13 to insulate the winding 13 from the iron core 11.

The winding wire 13 is composed of a plurality of substantially U-shaped coil segments 16. The twisted coil segment 16 has a flat cross section and is inserted from the end of the iron core 11 of the stator. The ends of the coil segments 16 form a coil end group 14 and are insulated with an insulating polymer 17 except for the ends used for welding.

In this embodiment, four coil segments 16 are accommodated in one slot 12 in four layers in the radial direction. As a result, four first inner end portions 181, second inner end portions 182, first outer end portions 191, and second outer end portions 192 are arranged in a line in the radial direction from the radially inner side. Then, the first inner end portion 181 and the second inner end portion 182, which are adjacent to each other in the radial direction, form the inner end pair 18 to be welded. The first outer end 191 and the second outer end 192 form the outer end pair 19 to be welded.

The inner end pair 18 and the outer end pair 19 are arranged on two imaginary circles that are concentric. A virtual circle formed by the tips of the plurality of inner end pairs 18 is a coil end group inner diameter ring 141, and a virtual circle formed by the tips of a plurality of outer end pairs 19 is a coil end group outer diameter ring 142. In the present embodiment, the number of the inner end pairs 18 and the number of the outer end pairs 19 are 72, and they are arranged so as to divide the circumference into 72.

3A shows an enlarged plan view of the inner end pair 18 and the outer end pair 19, and FIG. 3B shows an enlarged front view of the inner end pair 18 and the outer end pair 19.
The inner end pair 18 includes a first inner end 181 and a second inner end 182. The first inner end 181 has a first inner end vertical surface 185 that faces the second inner end 182 along the axial direction. The first inner end portion 181 has a first inner end horizontal surface 187 extending in the radial direction at the tip thereof, and one side thereof forms 90° with the first inner end vertical surface 185. The first inner end 181 has a first inner end inclined surface 183 that inclines radially outward as it goes upward. The first inner end sloped surface 183 makes an angle α° with the first inner end horizontal surface 187.

The second inner end 182 has a second inner end vertical surface 186 facing the first inner end 181 along the axial direction. The second inner end portion 182 has a second inner end horizontal surface 188 extending in the radial direction at its tip end and forming a 90° angle with one side of the second inner end vertical surface 186. The second inner end portion 182 has a second inner end portion inclined surface 184 that is inclined radially outward as it goes upward. The second inner end sloped surface 184 makes an angle α° with the second inner end horizontal surface 188.

The outer end pair 19 includes a first outer end 191 and a second outer end 192. The first outer end 191 has a first outer end vertical surface 195 facing the second outer end 192 along the axial direction. The first outer end portion 191 has a first outer end horizontal surface 197 that extends in the radial direction at its tip end and forms a 90° angle with the first outer end vertical surface 195 on one side. The first outer end 191 has a first outer end inclined surface 193 that inclines radially outward as it extends upward. The first outer end sloped surface 193 makes an angle α° with the first outer end horizontal surface 197.

The second outer end 192 has a second outer end vertical surface 196 facing the first outer end 191 along the axial direction. The second outer end portion 192 has a second outer end horizontal surface 198 extending radially along the tip thereof and forming a 90° angle with the second outer end vertical surface 196 on one side. The second outer end 192 has a second outer end sloped surface 194 that slopes radially inward as it extends upward. The second outer end sloped surface 194 makes an angle α° with the second outer end horizontal plane 198.
Finally, all the inner end pairs 18 and all the outer end pairs 19 are welded, and the welds are insulated by the insulating polymer 17.
The outline of the stator has been described above.

Next, the apparatus configuration and operation of the stator manufacturing apparatus according to the first embodiment of the present invention will be described based on FIGS. 4 to 8.
The stator manufacturing apparatus 30 includes a first straightening jig 31, a second straightening jig 32, an intermediate layer jig 33, a fixed plate 34, and a movable plate 37.

The movable plate 37 is a substantially disc provided above the fixed plate 34, and can be moved up and down with respect to the fixed plate 34 by a driving device including a motor or the like (not shown).
The movable plate 37 is provided with one first drive unit 38 at each of the substantially disk-shaped peripheral portions at positions where the movable plate 37 is divided into eight at equal intervals, and one second drive unit 39 at the center. .. The movable plate 37 is provided with one first stopper portion 35 at each substantially disk-shaped peripheral portion at a position where the movable plate 37 is divided into four at equal intervals. The movable plate 37 includes a second stopper portion 36 around the central portion.

The fixing plate 34 has a substantially disc shape, and is located on the intermediate layer jig 33, the first straightening jig 31, and the second straightening jig 32. There are eight openings corresponding to the position of the first drive unit 38 in the peripheral portion of the fixed plate 34. The fixing plate 34 has an opening at the center.

The first correction jig 31 is one of the substantially annular pillars divided into eight equal parts, and has a shape in which a central portion is hollowed out from a fan-shaped pillar. The first correction jig 31 has a rotatable first cam roller 312 that engages with the first drive unit 38. The first correction jig 31 has a first inclined surface 313 on the lower side of the side surface facing inward in the radial direction, which inclines outward in the radial direction as it goes downward. The inclination angle of the first inclined surface 313 is the same as the inclination angle α° of the second outer end inclined surface 194. However, these same angles include a practical error. The first slide rail 311 is attached to the fixed plate 34, and the first correction jig 31 is attached to the first slide rail 311 so as to be slidable in the radial direction. Accordingly, the first correction jig 31 can move relative to the fixed plate 34.

The second correction jig 32 is one of the substantially cylindrical parts divided into eight equal parts, and has a substantially fan-shaped pillar shape. The second correction jig 32 has a rotatable second cam roller 322 that engages with the second drive unit 39. The second correction jig 32 has a second inclined surface 323 on the lower side of the side surface facing the radially outer side, which inclines radially inward as it goes downward. The inclination angle of the second inclined surface 323 is the same as the inclination angle α° of the first inner end inclined surface 183. These same angles include a realistic error. The second slide rail 321 is attached to the fixed plate 34, and the second correction jig 32 is attached to the second slide rail 321 so as to be slidably movable in the radial direction. As a result, the second correction jig 32 can move relative to the fixed plate 34.

The intermediate layer jig 33 has a cylindrical shape without a bottom. The intermediate layer jig 33 has an inner inclined surface 332 on the radially inner lower side surface, which inclines radially outward as it goes downward. The inclination angle of the inner inclined surface 332 is the same as the inclination angle α° of the second inner end inclined surface 184.
The intermediate layer jig 33 has an outer inclined surface 331 on the radially outer lower side surface, which inclines radially inward as it goes downward. The inclination angle of the outer inclined surface 331 is the same as the inclination angle α of the second outer end inclined surface 194. However, these same angles include a practical error. The intermediate layer jig 33 is provided on the fixing plate 34 so as to be located between the first straightening jig 31 and the second straightening jig 32.

The first drive unit 38 has a columnar shape and penetrates the opening of the fixed plate 34. One end of the first drive unit 38 is attached to the movable plate 37. The other end is a free end and its shape is a downwardly convex first truncated cone 381. The first drive inclined surface 382 of the first truncated cone 381 is engaged with the first cam roller 312 of the first straightening jig 31.

The second drive unit 39 includes a second truncated cone 391 that is convex downward. The second truncated cone 391 is attached to the movable plate 37 so as to be movable in the vertical direction by a fixed column 393 that penetrates the central opening of the fixed plate 34. The second drive inclined surface 392 of the second truncated cone 391 is engaged with the second cam roller 322 of the second correction jig 32.

The first stopper portion 35 includes a first stopper rod 352, a second stopper rod 354, a first protective cover 351 and a second protective cover 353.
The first protective cover 351 has a cylindrical shape with a bottom, and is attached to the movable plate 37 so that the bottom portion thereof faces upward. One end of the first stopper rod 352 is attached to the bottom of the first protective cover 351. The other end of the first stopper rod 352 is a free end and is located inside the cylinder of the first protective cover 351.
The second protective cover 353 is tubular and has a tubular diameter smaller than the opening of the movable plate 37 and is attached to the fixed plate 34.
One end of the second stopper rod 354 is attached to the fixed plate 34. The other end of the second stopper rod 354 is a free end, and the free end is located upward in the cylinder of the second protective cover 353.

The second stopper portion 36 includes a third stopper rod 361.
One end of the third stopper rod 361 is attached to the movable plate 37. The other end of the third stopper rod 361 is a free end and faces the fixed plate 34.

The elastic member 40 is located between the first straightening jig 31 and the intermediate layer jig 33 and between the second straightening jig 32 and the intermediate layer jig 33. In this embodiment, the elastic member 40 is a spring. Alternatively, a leaf spring or the like may be used.

The operation of the stator manufacturing device 30 will be described.
FIG. 8 shows a sectional view during operation.
The movable plate 37 moves downward by a drive device (not shown).
The first drive unit 38 moves downward together with the movable plate 37, and the first drive inclined surface 382 of the first truncated cone 381 pushes the first cam roller 312 inward in the radial direction while rotating. Since the first cam roller 312 and the first straightening jig 31 are coupled, when the first cam roller 312 is pushed inward in the radial direction and moves, the first straightening jig 31 also moves inward in the radial direction.

The second drive unit 39 moves downward together with the movable plate 37, and the second drive inclined surface 392 of the second truncated cone 391 pushes the second cam roller 322 radially outward while rotating. Since the second cam roller 322 and the second straightening jig 32 are connected, when the second cam roller 322 is pushed outward in the radial direction and moves, the second straightening jig 32 also moves outward in the radial direction.
At this time, the eight first straightening jigs 31 and the eight second straightening jigs 32 all move in the radial direction at the same time.
The elastic member 40 is compressed from inside and outside in the radial direction, and elastic energy is accumulated.

The downward movement of the movable plate 37 is restricted by the first stopper rod 352 contacting the second stopper rod 354 and the third stopper rod 361 contacting the fixed plate 34.

Next, a method of aligning the coil ends of the stator 10 and a welding method using the stator manufacturing apparatus 30 according to the present embodiment will be described with reference to FIGS. 9 to 13.
The stator 10 is installed so as not to move with respect to the table 100. All the outer end pairs 19 are between the first straightening jig 31 and the intermediate layer jig 33, and all the inner end pairs 18 are between the second straightening jig 32 and the intermediate layer jig 33. As described above, the stator manufacturing device 30 is aligned in the radial direction. In this way, the coil end group inner diameter ring 141 is between the second straightening jig 32 and the intermediate layer jig 33, and the coil end group outer diameter ring 142 is the first straightening jig 31 and the intermediate layer jig. It is between the tool 33.

When the radial alignment is completed, the coil end group 14 is divided into eight, nine outer end pairs 19 are positioned between one first straightening jig 31 and the intermediate layer jig 33, and one outer end pair 19 is positioned. The nine inner end pairs 18 are located between the second straightening jig 32 and the intermediate layer jig 33.
Further, the vertical alignment is performed.
When the first correction jig 31 moves inward in the radial direction, the fixing plate 34 is moved downward until the first inclined surface 313 comes into contact with the second outer end inclined surface 194 of the second outer end 192. To move. When the second correction jig 32 is moved outward in the radial direction, the fixing plate 34 is moved downward until the second inclined surface 323 comes into contact with the first inner end inclined surface 183 of the first inner end 181. To move.
FIG. 9 shows a cross-sectional view in a state where the alignment is completed. A plan view is shown in FIG. FIG. 11 shows an enlarged cross-sectional view of the main part. FIG. 12 shows a cross-sectional view in which the coil tip portion in FIG. 11 is further enlarged.
After the alignment is completed, the fixing plate 34 is held by the fixing jig 110 so as not to move with respect to the table 100. The fixing jig 110 is, for example, a columnar metal rod or the like. Further, any fixing method may be used as long as the fixing plate 34 can be relatively fixed and held to the table 100 and the stator 10.

After the alignment is completed, the movable plate 37 is moved downward by the drive device 120. The first drive part 38 and the second drive part 39 connected to the movable plate 37 move downward. Then, it is pushed by the first drive inclined surface 382 of the first truncated cone 381 of the first drive unit 38, and the first cam roller 312 of the first correction jig 31 moves inward in the radial direction while rotating. Since the first cam roller 312 is connected to the first straightening jig 31, the first straightening jig 31 also moves radially inward. At this time, the eight first straightening jigs 31 simultaneously move inward in the radial direction.

When the movable plate 37 moves downward, the movable plate 37 is pushed by the second drive inclined surface 392 of the second truncated cone 391 of the second drive unit 39, and the second cam roller 322 of the second correction jig 32 rotates while radially moving. Move to the outside. Since the second cam roller 322 is connected to the second correction jig 32, the second correction jig 32 also moves radially outward. At this time, the eight second correction jigs 32 simultaneously move radially outward.

When the first correction jig 31 moves inward in the radial direction, the first inclined surface 313 of the first correction jig 31 pushes the second outer end inclined surface 194 of the second outer end 192 inward in the radial direction. Be done. Therefore, the second outer end 192 moves radially inward and contacts the first outer end 191. Then, the second outer end portion 192 and the first outer end portion 191 move radially inward together, and the first outer end inclined surface 193 of the first outer end portion 191 is located outside the intermediate layer jig 33. It contacts the inclined surface 331. In this way, the first outer end portion 191 and the second outer end portion 192 are sandwiched between the first correction jig 31 and the intermediate layer jig 33 and positioned in the circumferential direction and the radial direction. At this time, the first outer end horizontal surface 197 and the second outer end horizontal surface 198 are on the same plane. In this way, the outer edge pairs 19 are aligned. Note that the first outer end vertical surface 195 and the second outer end vertical surface 196 cannot completely contact due to the thickness of the insulating polymer 17, and there is a gap.
Further, the elastic member 40 is compressed with the intermediate layer jig 33 as the first correction jig 31 moves, and elastic energy is accumulated.

When the second correction jig 32 moves radially outward, the second inclined surface 323 of the second correction jig 32 pushes the first inner end inclined surface 183 of the first inner end 181 radially outward. Be done. Therefore, the first inner end 181 moves radially inward and contacts the second inner end 182. Then, the first inner end 181 and the second inner end 182 move radially outward together, and the second inner end slanted surface 184 of the second inner end 182 moves inside the intermediate layer jig 33. It contacts the inclined surface 332. In this way, the first inner end portion 181 and the second inner end portion 182 are sandwiched between the second correction jig 32 and the intermediate layer jig 33 and positioned in the circumferential direction and the radial direction. At this time, the first inner end horizontal surface 187 and the second inner end horizontal surface 188 are on the same plane. In this way, the inner end pairs 18 are aligned. Note that the first inner end vertical surface 185 and the second inner end vertical surface 186 cannot be completely contacted due to the thickness of the insulating polymer 17, and there is a gap.
Further, the elastic member 40 is compressed between the elastic member 40 and the intermediate layer jig 33 as the second correction jig 32 moves, and elastic energy is accumulated.
FIG. 13 shows a state in which the inner end pair 18 and the outer end pair 19 are aligned.

After all the inner end pairs 18 and all the outer end pairs 19 constituting the coil end group 14 are aligned, the coil end group 14 is welded by laser, arc or the like.

When welding is completed, the movable plate 37 is moved upward. Since both the first drive unit 38 and the second drive unit 39 move upward, there is also no force to push the first cam roller 312 and the second cam roller 322 radially inward and outward, respectively. The elastic energy accumulated in the compressed elastic member 40 is released, whereby the first straightening jig 31 is pushed radially outward and the second straightening jig 32 is pushed radially inward, respectively. Return to position. The fixing jig 110 that holds the fixing plate 34 of the stator manufacturing apparatus 30 on the table 100 is removed. After moving the stator manufacturing device 30 upward, the stator 10 is taken out from the table 100.
The method for aligning the coil ends of the stator 10 and the welding method using the stator manufacturing apparatus 30 according to the first embodiment have been described above.

Next, the effect of aligning the coil ends of the stator 10 using the stator manufacturing apparatus 30 according to the first embodiment will be described.

Another coil terminal manufacturing apparatus will be described with reference to FIGS. 14 and 15.
As shown in FIG. 14, a straightening jig 50 having a first groove 51 and a second groove 52 formed on the circumference is used to perform radial and vertical directions for all pairs of coil terminals only by vertical movement. I was correcting in two directions. The first groove 51 and the second groove 52 are trapezoidal grooves, and the inclination between the bottom surface and the upper surface of the trapezoid is equal to the inclination of the coil end portion.
As shown in FIG. 15A, a method of straightening and aligning the coil ends by moving the straightening jig 50 downward can be considered. However, since a downward force is applied to the coil end portion, the coil end portion is pushed down, which sometimes causes an uneven coil end portion in the vertical direction. For example, as shown in FIG. 15(b), the inner end pairs 18 are aligned without deviation, but the second outer ends 192 of the outer end pairs 19 are pushed downward, so that the first outer ends. A step L is generated between the step 191 and the point 191.
Such a step L may cause a welding error during welding. Further, if the radial width of the coil segment 16 changes, it is necessary to remake the correction jig itself.

On the other hand, when the stator manufacturing device 30 of the present embodiment is used, only a force that pushes the inner end pair 18 and the outer end pair 19 in the radial direction is applied, and no downward force is applied. No directional displacement occurs. Therefore, the quality of welding is stable.
Since the inclined surface of the inner end pair 18 and the outer end pair 19 and the inclined surface of the jig have the same inclination, the inclined surface of the coil end and the inclined surface of the jig are Since they come into surface contact and a stable force is applied, they can be aligned accurately.
The downward movement of the movable plate 37 is limited by the first stopper rod 352 contacting the second stopper rod 354 and the third stopper rod 361 contacting the fixed plate 34. Therefore, the moving distance of the first straightening jig 31 and the second straightening jig 32 in the radial direction can be changed by changing the lengths of the first stopper rod 352, the second stopper rod 354, and the third stopper rod 361. Is. Therefore, even if the width of the coil end in the radial direction changes, it can be easily adjusted.

Since the eight first straightening jigs 31 and the eight second straightening jigs 32 move at the same time, the coil end group 14 can be aligned in a short time.
With a simple configuration of the cam roller and the conical member, the first straightening jig 31 and the second straightening jig 32 can be moved in the radial direction, and the device cost can be suppressed.

(Second embodiment)
A stator manufacturing apparatus according to the second embodiment will be described with reference to FIG.
The stator manufacturing apparatus 60 includes a first straightening jig 31, a second straightening jig 32, an intermediate layer jig 33, and a fixing plate 34. The manufacturing apparatus 60 further includes a first actuator 61 and a second actuator 62.

The first actuator 61 is attached to the fixed plate 34 and is connected to the first straightening jig 31, and moves the first straightening jig 31 in the radial direction. Since one first actuator 61 is provided for each first correction jig 31, eight actuators are required in this embodiment.
The second actuator 62 is attached to the fixed plate 34 and is connected to the second correction jig 32, and moves the second correction jig 32 in the radial direction. Since one second actuator 62 is provided for each second correction jig 32, eight actuators are required in this embodiment.
The actuator may be, for example, an air cylinder, a linear motor, a solenoid, or any other actuator that can drive linearly.

Next, a coil end alignment method and a welding method of the stator 10 using the stator manufacturing apparatus 60 according to the present embodiment will be described.
The radial alignment and the vertical alignment of the manufacturing apparatus 60 are the same as in the first embodiment.
After the alignment is completed, the first actuator 61 is driven to move the first correction jig 31 inward in the radial direction. The second actuator 62 is driven to move the second correction jig 32 radially outward. At this time, all the first straightening jigs 31 and the second straightening jigs 32 may be simultaneously driven, or may be individually driven. In this way, after all the inner end pairs 18 and all the outer end pairs 19 that form the coil end group 14 are sandwiched by the intermediate layer jig 33 and aligned as in the first embodiment. The coil end group 14 is welded with a laser or an arc.

After the welding is completed, the first actuator 61 is driven to move the first straightening jig 31 outward in the radial direction, and the second actuator 62 is driven to move the second straightening jig 32 inward in the radial direction. The straightening jig 31 and the second straightening jig 32 are returned to the current position.
Then, the fixing jig 110 that holds the fixing plate 34 of the stator manufacturing apparatus 60 on the table 100 is removed. After moving the stator manufacturing apparatus 60 upward, the stator 10 is taken out from the table 100.

In the present embodiment, since the inner end pair 18 and the outer end pair 19 are pressed in the radial direction for correction, the coil ends are not displaced in the vertical direction, and in addition to the effect that the welding quality is stable. As a result, the following effects can be obtained.
It is possible to move the plurality of first straightening jigs 31 and the plurality of second straightening jigs 32 one by one without moving them simultaneously. It is possible to perform control according to the characteristics of the coil ends, such as aligning only a part of the coil end group 14 with a strong force or a weak force.
After the welding of the coil ends is completed, the first straightening jig 31 and the second straightening jig 32 can be returned to their original positions without requiring the repulsive force of the elastic member.
When the width of the coil end in the radial direction is changed, it is possible to simply control the actuator without changing the lengths of the first stopper rod 352, the second stopper rod 354 and the third stopper rod 361 as in the first embodiment. The movement distance of the first correction jig 31 and the second correction jig 32 can be easily changed.

(Other embodiments)
The circumferences of the first straightening jig and the second straightening jig may be divided into, for example, 6 or 12. Further, for example, the first straightening jig divides the circumference into 12 and the second straightening jig divides the circumference into 8, so that the number of the first straightening jigs and the number of the second straightening jigs are different. May be.
The present invention may be implemented by the above embodiments alone or in combination. Further, the present invention is not limited to the above-described embodiment, but can be implemented in various forms without departing from the spirit of the invention.

30, 60 Stator Manufacturing Equipment 10 Stator, 11 Stator Core, 12 Slots, 16 Coil Segments 18 Inner End Pairs, 19 Outer End Pairs 31 First Straightening Jig, 32 Second Straightening Jig, 33 Intermediate Layer jig, 34 Fixed plate 37 Movable plate, 38 First drive part, 39 Second drive part 40 Elastic member 61 First actuator, 62 Second actuator 110 Fixing jig

Claims (8)

A U-shaped coil segment (16) inserted into the slot (12) of the stator core (11) of the stator (10), the tip of the coil protruding from the end of the stator core being the stator. In the process of manufacturing the stator by welding the inner end pair (18) and the outer end pair (19) on the outer side in a radial direction, and welding the inner end pair and the outer end pair. A stator manufacturing apparatus (30, 60) used, comprising:
Along the axial direction of the stator, the direction in which the coil tip portion is present is the upward direction and the opposite direction is the downward direction, and along the radial direction of the stator, the direction toward the central axis is the radially inner side, When the opposite direction is the radial outside,
A fixing plate (34) held by a fixing jig (110) above the coil tip portion of the stator core;
A cylinder provided on the fixing plate so as to be located between the outer end pair and the inner end pair, the outer side being inclined toward the inner side in the downward direction on the lower side surface on the outer side in the radial direction. An intermediate layer jig (33) having an inclined surface (331) and an inner inclined surface (332) which inclines radially outwardly on the lower side surface on the radially inner side;
It has a first inclined surface (313) on the lower side surface on the inner side in the radial direction that inclines toward the outer side in the radial direction as it goes downward, and is provided on the outer side in the radial direction with respect to the pair of outer end portions, and is relative to the fixed plate. A first straightening jig that is movable inward in the radial direction and that can sandwich the outer end pair with the intermediate layer jig to make the heights of the tips of the outer end pair the same. 31),
It has a second inclined surface (323) on the lower side surface on the outer side in the radial direction that inclines inward in the radial direction as it goes downward, and is provided on the inner side in the radial direction with respect to the pair of inner end portions, and relative to the fixed plate. A second straightening jig that is movable radially outwardly, and that can sandwich the inner end pair with the intermediate layer jig to make the heights of the tips of the inner end pairs the same. 32),
An apparatus for manufacturing a stator. Of the pair of outer ends, the second outer end (192), which is a radially outer terminal, has a second outer end inclined surface (194) that inclines radially inward as it goes upward. When
The inclination angle of the first inclined surface is the same as the inclination angle of the second outer end inclined surface,
Of the pair of inner end portions, a first inner end portion (181), which is a radially inner terminal, has a first inner end inclined surface (183) that inclines radially outward as it goes upward. When
The inclination angle of the second inclined surface is the same as the inclination angle of the first inner end inclined surface,
Of the pair of outer ends, a first outer end (191), which is a radially inner terminal, has a first outer end inclined surface (193) that inclines radially outward as it goes upward. When
Of the inner end pair, the second inner end (182), which is a radially outer terminal, has a second inner end inclined surface (184) that inclines radially outward as it goes upward. When
The inclination angle of the outer inclined surface is the same as the inclination angle of the first outer end inclined surface,
The inclination angle of the inner inclined surface is the same as the inclination angle of the second inner end inclined surface,
The stator manufacturing apparatus according to claim 1. A movable plate (37) provided above the fixed plate and movable in the downward direction;
A first drive unit (38) provided on the movable plate, and having a convex first truncated cone (381) that is also movable downward when the movable plate moves downward;
A second drive unit (39) provided on the movable plate, and having a convex second truncated cone (391) capable of simultaneously moving downward when the movable plate moves downward;
When rotatably provided on the first straightening jig and engaged with a first drive slope (382) of the first truncated cone, when the first truncated cone moves downward, the first drive slope becomes A first cam roller (312) that is pressed and rotated, and is movable inward in the radial direction together with the first correction jig;
When the second driving jig is rotatably provided, engages with the second driving slope (392) of the second truncated cone, and the second truncated cone moves downward, the second driving slope is moved to the second driving slope. A second cam roller (322) that is pressed and rotated, and is movable radially outward together with the second correction jig;
The stator manufacturing apparatus (30) according to claim 1 or 2, further comprising: And between the intermediate layer jig and the first straightening jig has a resilient member (40) and between the said intermediate layer jig and the second correction jig, any one of claims 1 to 3 The stator manufacturing apparatus (30) according to one item. A first actuator (61) provided on the fixing plate and capable of moving the first correction jig inward in the radial direction;
A second actuator (62) provided on the fixed plate, which allows the second correction jig to move radially outward,
The stator manufacturing apparatus (60) according to claim 1 or 2, further comprising: And a plurality of the first correction jig and the second correction jig circumferentially apparatus for manufacturing a stator according to any one of claims 1 to 5. Wherein the first correction jig and the second correction jig and the stator manufacturing apparatus according to the same time any one of the movable claims 1-6. The stator manufacturing device (60) according to claim 1, 2, 5, or 6 , wherein the first straightening jig and the second straightening jig are individually movable.

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