JP5251670B2 - Junction positioning jig, and conductor end joining method and joining apparatus using the same - Google Patents

Description

  The present invention relates to a joining portion positioning jig used when joining a pair of conductor portions of a coil in a stator for a rotating electrical machine via a brazing material with a pair of joining electrodes, and a method for joining conductor ends using the same. .

For example, when a stator of a rotating electrical machine used in a hybrid vehicle or the like is manufactured using a conductor such as a flat wire, the conductor end portions of a coil that goes around the stator core are joined together via a brazing material.
And when performing this joining operation | work, the operator has confirmed whether the conductor edge parts are in an appropriate position by visual observation. At this time, when the conductor end portions are not in an appropriate position, the conductor end portions are appropriately corrected by manual work, and then the conductor end portions are bonded to each other via the brazing material by a pair of bonding electrodes.

  Although not used when joining the conductor ends, Patent Document 1 discloses a bending tool used in a method for manufacturing a stator to bend a coil lead portion. Yes. The bending tool includes a shaft portion having a substantially cylindrical outer peripheral surface, a pair of gripping portions that protrude from the outer peripheral surface of the shaft portion and sandwich the lead portions connected to each other, and a rotational torque for bending work on the shaft portion. And a base end portion for transmitting the power.

JP 2004-72838 A

  However, when joining the conductor ends in the coil, if the operator's visual inspection and manual operation are required, the skill of the operator is required. Further, not only the work efficiency is poor, but the joining state may be slightly shifted, and the joining area may be reduced. Furthermore, the gap for inserting the brazing material between the conductor end portions is very small. If this gap is narrower than the reference, it is necessary to force the brazing material into the conductor end portions.

  The present invention has been made in view of such conventional problems, and can improve the efficiency of the joining work between the conductor end portions in the coil, and can perform the joining accurately and stably. An object of the present invention is to provide a jig and a method of joining conductor ends using the jig.

1st invention WHEREIN: In the stator for rotary electric machines, the one side circumferential conductor end part bent to the circumferential direction one side from the rising conductor part which protruded in parallel to the axial direction from the axial direction end surface of the stator core, and the other said rising conductor A state in which the other side circumferential conductor end that is bent from the portion to the other circumferential side and overlaps the inner circumferential side of the one side circumferential conductor end is aligned in a radial direction by a pair of bonding electrodes via a brazing material It is a joint positioning jig used when joining with,
A base member disposed with respect to the axial end surface of the stator core;
A guide block that is disposed on the base member and guides the one side circumferential conductor end and the other side circumferential conductor end to face each other in the radial direction;
Conductor interval forming means for forming an insertion gap into which the brazing material can be inserted between the one side circumferential conductor end and the other side circumferential conductor end;
The guide block has, on the other side in the circumferential direction with respect to the insertion position of the brazing material, a one side inner circumferential guide portion that guides the one side circumferential conductor end to the radial inner circumference side, and the insertion position of the brazing material. On the one side in the circumferential direction, the other side outer circumferential guide portion for guiding the other side circumferential conductor end to the radial outer circumferential side,
The conductor interval forming means guides the one side circumferential conductor end against the one side inner circumferential guide, and guides the other side circumferential conductor to the other outer circumferential guide. The joint positioning jig is characterized in that it is configured to guide in a direction in which the portion is pressed.

The joining portion positioning jig of the present invention is used when joining the conductor end portions of coils in a stator for a rotating electrical machine using a brazing material. And by using this joining part positioning jig | tool, the arrangement position of a conductor edge part can be corrected to an appropriate position, and it can join stably irrespective of an operator's skill.
Specifically, the joint positioning jig of the present invention includes the base member, the guide block, and the conductor interval forming means. And a base member is arrange | positioned corresponding to the circumferential direction position of the stator which joins conductor edge parts, and a guide block is arrange | positioned with respect to this base member. Thereby, even if the said one side circumferential conductor end part and the said other side circumferential conductor end part exist in the state which mutually separated, these are the one side inner periphery guide part in the guide block, and the said other side outer periphery guide part. Can be brought into a state where they can be joined.

Also, the brazing material is inserted between the one side circumferential conductor end and the other side circumferential conductor end by guiding the one side circumferential conductor end and the other circumferential conductor end by the conductor spacing forming means. A possible insertion gap can be ensured. Thus, an insertion gap for inserting the brazing material can be stably secured in an appropriate positional relationship between the one side circumferential conductor end and the other side circumferential conductor end.
Then, a brazing material is inserted into the insertion gap, and the one side circumferential conductor end and the other circumferential conductor end are sandwiched from both sides in the radial direction via the brazing material by a pair of joining electrodes, and a pair of joints By passing a current between the electrodes, both conductor end portions can be joined with high accuracy and stability.

  Therefore, according to the joining part positioning jig of the present invention, the efficiency of joining work between the conductor end parts in the coil can be improved, and this joining can be performed accurately and stably.

2nd invention uses the said joint part positioning jig, and joins the said one side circumferential conductor end part and the said other side circumferential conductor end part via the said brazing | waxing material with a pair of said joining electrode. Because
The base member is arranged at a circumferential position of the stator core corresponding to the one side circumferential conductor end and the other side circumferential conductor end, the guide block is arranged with respect to the base member, and The one-side inner circumferential guide portion guides the one-side circumferential conductor end toward the radially inner periphery, and the other-side outer circumferential guide portion guides the other-side circumferential conductor end toward the radially outer circumferential side. A first positioning step;
The conductor spacing forming means guides the one side circumferential conductor end against the one side inner circumferential guide, and guides the other side circumferential conductor to the other outer circumferential guide. A second positioning step of guiding in the direction in which the portion is pressed and securing an insertion gap into which the brazing material can be inserted between the one side circumferential conductor end and the other side circumferential conductor end;
After the brazing material is inserted into the insertion gap, the pair of joining electrodes are approached from both radial sides of the one-side circumferential conductor end and the other-side circumferential conductor end, and the one-side circumferential conductor A joining step of joining the end portion and the other circumferential conductor end portion via the brazing filler metal to the conductor end portion joining method using the joining portion positioning jig. 5).

The method for joining conductor ends using the joint positioning jig of the present invention is a method suitable for joining conductor ends using the joint positioning jig.
In the present invention, first, as the first positioning step, the base member is disposed with respect to the stator core, and the guide block is disposed with respect to the base member. At this time, the one side circumferential conductor end is guided to the radially inner circumferential side by the one side inner circumferential guide portion, and the other side circumferential conductor end is guided to the radially outer circumferential side by the other side outer circumferential guide portion. Thus, even if the one side circumferential conductor end and the other side circumferential conductor end are in a state of being separated from each other, they can be brought into a state where they can be joined.

  Next, as a second positioning step, the one-side circumferential conductor end and the other-side circumferential conductor end are guided by the conductor interval forming means, and the one-side circumferential conductor end and the other-side circumferential conductor end are An insertion gap into which the brazing material can be inserted can be secured. Thus, an insertion gap for inserting the brazing material can be stably secured in an appropriate positional relationship between the one side circumferential conductor end and the other side circumferential conductor end.

  Then, as a joining process, after inserting a brazing material into the insertion gap, a pair of joining electrodes are approached from both radial sides of the one side circumferential conductor end and the other side circumferential conductor end, and the one side circumferential conductor The end portion and the other circumferential conductor end portion are joined via a brazing material. At this time, since the one-side circumferential conductor end and the other-side circumferential conductor end are guided to appropriate positions, the two conductor ends can be joined with high accuracy and stability.

  Therefore, according to the method for joining conductor end portions of the present invention, the efficiency of joining work between the conductor end portions in the coil can be improved, and this joining can be performed with high accuracy and stability.

3rd invention is the positioning joining apparatus using the said junction part positioning jig,
The positioning bonding apparatus includes the bonding portion positioning jig, the pair of bonding electrodes accessible to each other, a brazing material storage unit for storing the brazing material, and a brazing material having a predetermined length from the brazing material storage unit. A brazing material feed section that feeds into the insertion gap, and is three-dimensionally movable with respect to the rotating electrical machine stator,
And in the said junction part positioning jig | tool, the said positioning block using the junction part positioning jig | tool characterized by arrange | positioning the said guide block and the said conductor space | interval formation means movably with respect to the said base member. In the apparatus (claim 9).

The positioning and bonding apparatus of the present invention enables movement of the guide block and the conductor interval forming means in the bonding portion positioning jig, and a pair of bonding electrodes, brazing material storage portion and brazing material with respect to the bonding portion positioning jig. A feed portion is arranged so as to be three-dimensionally movable with respect to the stator for a rotating electrical machine.
And when joining a conductor edge part, a positioning joining apparatus is moved to the stator for rotary electric machines, and the base member in a joining part positioning jig is arrange | positioned with respect to a stator core.

  Next, the guide block is moved and arranged with respect to the pair of circumferential conductor ends, and the conductor interval forming means is moved and arranged with respect to the pair of circumferential conductor ends. Next, the brazing material feeding unit feeds the brazing material having a predetermined length from the brazing material storage unit to the insertion gap between the pair of circumferential conductor ends. Then, a pair of joining electrodes are brought close to each other, and a current is passed between the pair of joining electrodes in a state where the pair of circumferential conductor ends are sandwiched between the pair of joining electrodes via a brazing material. A pair of circumferential conductor ends are joined via a material.

  Therefore, according to the positioning joining apparatus of the present invention, the efficiency of joining work between the conductor end portions in the coil can be improved, and this joining can be performed with high accuracy and stability.

FIG. 3 is a perspective view illustrating a stator for a rotating electrical machine according to the first embodiment. The perspective view which shows the state which attached the base member to the stator core in Example 1. FIG. The perspective view which shows the state which guided the pair of circumferential conductor edge part in the circumferential direction inner side in Example 1 by the circumferential direction guide part. The perspective view which shows the state which guided the pair of circumferential direction conductor edge part to the radial inside by the guide block in Example 1. FIG. The perspective view which shows the state which formed the radial direction clearance gap between a pair of circumferential direction conductor ends by the conductor space | interval formation block in Example 1. FIG. The perspective view which shows the state which joined a pair of circumferential direction conductor edge part via the brazing | wax material by a pair of joining electrode in Example 1. FIG. Sectional explanatory drawing shown in the state which looked at the junction part positioning jig | tool in Example 1 from the radial direction inner peripheral side. Cross-sectional explanatory drawing which shows the junction part positioning jig in Example 1 in the state seen from the circumferential direction. Sectional explanatory drawing which shows the lower part vicinity of the junction part positioning jig | tool in Example 1 in the state seen from the axial direction upper part. Cross-sectional explanatory drawing which shows the joining part positioning jig in the state which formed the radial clearance between a pair of circumferential direction conductor ends in Example 1 in the state seen from the circumferential direction. Cross-sectional explanatory drawing which shows the joining part positioning jig | tool of the state which joins a pair of circumferential direction conductor edge part via a brazing material in Example 1 in the state seen from the circumferential direction. Cross-sectional explanatory drawing which shows the state which guided the pair of circumferential direction conductor edge part in the radial direction inner side in Example 1 from the axial direction upper direction. Cross-sectional explanatory drawing which shows the state which formed the radial gap between a pair of circumferential direction conductor ends by the conductor space | interval formation block in Example 1, seeing from the axial direction upper direction. Cross-sectional explanatory drawing which shows the joining part positioning jig | tool of the state which joins a pair of circumferential direction conductor edge part via a brazing material in Example 1 in the state seen from the axial direction upper part. FIG. 9 is a perspective explanatory view showing a positioning and joining apparatus in Embodiment 2.

A preferred embodiment in the first and second inventions described above will be described.
In the first and second inventions, the coil formed with the one side circumferential conductor end and the other side circumferential conductor end is preferably composed of a rectangular conductor (a conductor having a substantially square cross section).
The stator for a rotating electrical machine can be used for a motor, a generator, and a motor generator.
In addition, the one side inner periphery guide portion and the other side outer periphery guide portion can be formed integrally with respect to one guide block, or can be formed in separate guide blocks.

  1st invention WHEREIN: The said guide block is the other side formed facing the outer peripheral side with respect to the said 1st inner periphery guide part and the outer peripheral side with respect to the said other side outer periphery guide part. And the conductor interval forming means is formed by the one side circumferential conductor end portion guided by the one side inner circumferential guide portion to the radially inner circumferential side and the one side facing portion. Arranged in the radial gap between the one-side conductor spacing forming block arranged in the radial gap and the other-side circumferential conductor end portion guided by the other-side outer circumference guide portion to the radial outer circumference side and the other-side facing portion. The other side conductor interval forming block is preferably configured.

  Further, in the second invention, the guide block includes a one-side facing portion facing the inner peripheral side with respect to the one-side inner peripheral guide portion, and another side facing portion facing the outer peripheral side with respect to the other-side outer peripheral guide portion. As the conductor interval forming means, the radial direction between the one side circumferential conductor end portion guided by the one side inner circumferential guide portion to the radially inner circumferential side and the one side facing portion One side conductor interval forming block arranged in the gap, and the other side arranged in the radial gap between the other side circumferential conductor end portion guided by the other side outer circumferential guide portion and the other side facing portion. In the second positioning step, using the side conductor interval forming block, the one side conductor interval forming block is disposed in the radial gap between the one side circumferential conductor end and the one side facing portion, and By the radial clearance between the serial other side circumferential conductor end portion and the other side face portion to place the other side conductor spacing building block, it is preferable to secure the insertion gap (claim 6).

In these cases, the insertion gap can be secured with a very simple configuration by using the opposing portions and the conductor interval forming blocks in the guide block.
The one-side conductor interval forming block and the other-side conductor interval forming block can be formed separately, or can be formed integrally in the same block.
Moreover, the said conductor space | interval formation means can also be used as a means to expand the radial direction gap | interval of a one side circumferential conductor end part and a one side circumferential conductor end part.

  Further, in the first invention, the guide block includes a brazing material inlet for guiding the brazing material into a radial gap between the one side circumferential conductor end and the other side circumferential conductor end, It is preferable to have a pair of electrode arrangement concave portions formed on both sides in the radial direction of the portion where the brazing material introduction port is formed, for arranging the pair of bonding electrodes.

  In the second invention, the guide block includes a brazing filler inlet for guiding the brazing filler into a radial gap between the one circumferential conductor end and the other circumferential conductor end. A pair of electrode placement recesses for placing the pair of bonding electrodes is formed on both sides in the radial direction of the portion where the brazing material introduction port is formed, and the brazing material introduction is performed in the second positioning step. It is preferable that the insertion gap is secured immediately below the mouth, and that the brazing material is inserted into the insertion gap from the brazing material introduction port in the joining step in the state in which the insertion gap is formed. 7).

In these cases, the brazing material can be supplied more stably by supplying the brazing material to the insertion gap between the respective circumferential conductor end portions while being passed through the brazing material introduction port.
In addition, the guide block is formed by integrally connecting the portion where the one side inner periphery guide portion is formed and the portion where the other side outer periphery guide portion is formed by the portion where the brazing material introduction port is formed. Can do. And by forming a pair of electrode arrangement | positioning recessed part, a pair of joining electrode can be made to contact each circumferential direction conductor edge part, without making it interfere with a guide block.

  In the first aspect of the invention, the base member may have the one side circumferential conductor end and the other side circumferential conductor end facing the lower part of the one side inner guide portion and the one side facing portion. A load receiving portion that receives a load applied to the portion from the guide block, a one-side circumferential guide portion that guides the one-side circumferential conductor end portion to the one-side circumferential direction, and the other-side circumferential conductor end portion. It is preferable to provide the other side circumferential direction guide part which guides this other side circumferential direction conductor edge part to the said circumferential direction other side facing the base end part of this.

  In the second aspect of the invention, the base member may have the one side circumferential conductor end and the other side circumferential conductor end facing the lower part of the one side inner guide portion and the one side facing portion. A load receiving portion that receives a load applied from the guide block to the portion, and a base end portion of the one side circumferential conductor end portion, and guides the one side circumferential conductor end portion to the circumferential one side. One side circumferential guide portion that opposes the base end portion of the other circumferential conductor end, and the other circumferential guide portion that guides the other circumferential conductor end to the other circumferential side. In the first positioning step, the one side circumferential conductor end portion and the other side circumferential conductor end portion are connected by the one side circumferential guide portion and the other side circumferential guide portion. , Guide to the inside in the circumferential direction approaching each other, and By weight receiving portion, it is preferable to receive a load applied from the guide block relative to the one side circumferential conductor end portion and the other side circumferential conductor end (claim 8).

  In these cases, by using the one-side circumferential guide portion and the other-side circumferential guide portion, the arrangement relationship between the circumferential conductor end portions can be further stabilized.

Hereinafter, embodiments of the joint positioning jig of the present invention, and a conductor end joining method and joining apparatus using the jig will be described with reference to the drawings.
Example 1
As shown in FIG. 5, the joining portion positioning jig 1 of this example performs positioning when joining the conductor end portions 84 </ b> A and 84 </ b> B of the coil 8 in the stator 6 for a rotating electrical machine.
As shown in FIGS. 1 and 14, the joining portion positioning jig 1 is bent from the rising conductor portion 82 projecting parallel to the axial direction L from the axial end surface 71 of the stator core 7 to the one circumferential side C1. A pair of the conductor end portion 84A and the other circumferential conductor end portion 84B that is bent from the other rising conductor portion 82 to the other circumferential side C2 and overlaps the inner circumferential side of the one side circumferential conductor end portion 84A It is used when the joining electrodes 52 are joined in the state of being arranged in the radial direction R via the brazing material 85.

  As shown in FIG. 5, the joint positioning jig 1 is disposed on the base member 2 with respect to the axial end surface 71 of the stator core 7, disposed on the base member 2, and on one side circumferential conductor end 84 </ b> A and the other side. Insertion that can insert the brazing material 85 between the guide block 3 that guides the circumferential conductor end portion 84B so as to face the radial direction R, and the one side circumferential conductor end portion 84A and the other circumferential conductor end portion 84B. Conductor interval forming means 4A and 4B for securing the gap 87 are provided.

  As shown in FIGS. 12 and 13, the guide block 3 is arranged on the other side C2 in the circumferential direction with respect to the insertion position of the brazing filler metal 85, and guides the one side circumferential conductor end 84 </ b> A to the radially inner side R <b> 1. The guide portion 32A and the other circumferential guide portion 32B for guiding the other circumferential conductor end portion 84B to the radially outer circumferential side R2 on the circumferential one side C1 with respect to the insertion position of the brazing material 85 are provided. The conductor spacing forming means 4A and 4B guide the one side circumferential conductor end 84A against the one side inner circumferential guide portion 32A, and guide the other side circumferential conductor with respect to the other outer circumferential guide portion 32B. It is configured to guide the end portion 84B in the pressing direction.

Below, it explains in full detail with reference to FIGS. 1-14 about the joining part positioning jig | tool 1 of this example, and the joining method of the conductor edge part using this.
As shown in FIG. 1, the rotating electrical machine stator 6 of this example is configured by arranging three-phase coils 8 of a U phase, a V phase, and a W phase on a stator core 7 in a distributed winding state. The coil 8 of each phase is formed by bending a rectangular conductor having a substantially square cross section formed by forming an insulating film on the surface of a conductor made of a copper material into a wave shape. The coil 8 of each phase has a rising conductor portion 82 rising outside the slot 72 and a coil end conductor portion 83 connecting the rising conductor portions 82 to each other in the circumferential direction C with respect to the slot conductor portion 81 disposed in the slot 72 of the stator core 7. It is formed. The coil 8 of each phase is formed in a wave winding shape by alternately arranging coil end conductor portions 83 on one side and the other side in the axial direction L, and in a distributed winding state in a plurality of slots 72 in the stator core 7. Has been placed.

  Further, each of the circumferential conductor end portions 84 </ b> A and 84 </ b> B to be positioned and joined by the joining portion positioning jig 1 is formed as a part of the coil end conductor portion 83. The coils 8 of each phase are arranged in a plurality of stages in the radial direction R of the slot 72 of the stator core 7, and the circumferential conductor end portions 84 </ b> A and 84 </ b> B have a turn configuration that makes a round in the circumferential direction C of the stator core 7 in the coil 8. It is formed as the end of the part.

In FIGS. 12 to 14, for easy understanding, the one-side inner peripheral guide portion 32 </ b> A, the one-side opposing portion 33 </ b> A, the other-side outer peripheral guide portion 32 </ b> B, and the other-side opposing portion 33 </ b> B are hatched.
As shown in FIGS. 10 and 12, the guide block 3 of this example includes a one-side facing portion 33 </ b> A formed facing the inner peripheral side with respect to the one-side inner peripheral guide portion 32 </ b> A and an outer peripheral side with respect to the other-side outer peripheral guide portion 32 </ b> B. The brazing filler metal inlet 341 for guiding the brazing filler metal 85 to the gap in the radial direction R between the other-side facing portion 33B formed opposite to the outer circumferential portion and the one-side circumferential conductor end portion 84A and the other-side circumferential conductor end portion 84B. And a pair of electrode placement recesses 342 for placing the pair of bonding electrodes 52 formed on both sides in the radial direction R of the portion where the brazing material introduction port 341 is formed.
As shown in FIG. 12, the guide block 3 is provided with one side portion 31A provided with one side inner peripheral guide portion 32A and one side opposing portion 33A, and the other side outer peripheral guide portion 32B and the other side opposing portion 33B. The other side portion 31 </ b> B is connected by a central portion 34 in which a brazing material introduction port 341 is formed, and has an H shape when viewed from the direction in which the stator core 7 is arranged in the axial direction L.

  As shown in FIG. 5, the guide block 3 of this example positions the pair of circumferential conductor ends 84 </ b> A and 84 </ b> B by being attached to the base member 2 via the positioning block 35. The positioning block 35 is attached to the upper part of the one side part 31A of the guide block 3 and the other side attached to the upper part of the other side part 31B of the guide block 3 with respect to the main body part 351 attached to the base member 2. The arrangement part 352B is branched and formed, and a space 353 for arranging the pair of bonding electrodes 52 is formed between the one side arrangement part 352A and the other side arrangement part 352B. The space 353 is formed above the pair of electrode placement recesses 342 and the central portion 34 in the guide block 3.

  As shown in FIGS. 7 and 13, the conductor spacing forming means 4A and 4B of this example are configured such that one side circumferential conductor end portion 84A and one side guided by the one side inner circumferential guide portion 32A to the radial inner circumferential side R1. One side conductor spacing forming block 4A disposed in the radial gap 86 with the facing portion 33A, and the other side circumferential conductor end portion 84B and the other side facing portion guided to the radial outer circumferential side R2 by the other side outer circumferential guide portion 32B. It is comprised from the other side conductor space | interval formation block 4B arrange | positioned in the radial direction gap 86 with 33B.

  Each of the conductor interval forming blocks 4A and 4B in this example is protruded from the upper and lower body portions 41 opposed to the side of the one side portion 31A in the guide block 3 and the lower portion of the upper and lower body portions 41, and each circumferential conductor end portion. 84A, 84B and the lower protrusion 42 arranged between the opposing portions 33A, 33B in the guide block 3 and the upper and lower body portions 41 protrude above the lower protrusion 42, and between the lower protrusion 42 in the guide block 3 One side portion 41A (or the other side portion 41B) and an upper protrusion 43 for sandwiching the one side arrangement portion 352A (the other side arrangement portion 352B) in the positioning block 35 are provided. Each of the conductor interval forming blocks 4A and 4B can be made of a resin material in order to prevent the circumferential conductor end portions 84A and 84B from being damaged. The guide block 3 and the like can be made of a metal material in consideration of durability.

  As shown in FIGS. 8 and 10, the one-side inner circumferential guide portion 32 </ b> A and the one-side facing portion 33 </ b> A are formed so as to protrude from both end portions of the one-side portion 31 </ b> A. In the one-side inner circumferential guide portion 32A and the one-side facing portion 33A, the C-side or R for performing positioning guide of the one-side circumferential conductor end portion 84A or the one-side conductor spacing forming block 4A is provided at the inner corners facing each other. A chamfered portion 331 having a shape is formed. The other side outer peripheral guide portion 32B and the other side facing portion 33B are formed so as to protrude from both end portions of the other side portion 31B. In the other side outer periphery guide part 32B and the other side facing part 33B, the inner corners facing each other have a C surface or an R shape for guiding the positioning of the other side circumferential conductor end portion 84B or the other side conductor interval forming block 4B. The chamfered portion 331 is formed.

  As shown in FIGS. 7 and 9, the base member 2 of this example has the one side circumferential conductor end 84 </ b> A facing the base end 841 of the one side circumferential conductor end 84 </ b> A and the one circumferential side conductor C <b> 1 in the circumferential direction C <b> 1. The other side circumference that guides the other side circumferential conductor end 84B to the other circumferential side C2 opposite to the one side circumferential guide portion 21A that guides to the base end 841 of the other side circumferential conductor end 84B. A direction guide portion 21B is provided. The one-side circumferential guide portion 21A and the other-side circumferential guide portion 21B have a circumferential distance between the proximal end portion 841 of the one-side circumferential conductor end portion 84A and the proximal end portion 841 of the other-side circumferential conductor end portion 84B. Guide to C. One side circumferential guide portion 21 </ b> A and the other side circumferential guide portion 21 </ b> B can adjust the position in the circumferential direction C with respect to the base member 2.

  Further, the base member 2 is provided with load receiving portions 22A and 22B that receive loads applied from the guide block 3 to the one-side circumferential conductor end portion 84A and the other-side circumferential conductor end portion 84B. The load receiving portions 22A and 22B include one side load receiving portion 22A disposed below the one side circumferential conductor end portion 84A and the other side load receiving portion 22B disposed below the other side circumferential conductor end portion 84B. There is.

  As shown in FIGS. 13 and 14, the brazing material 85 of this example is a flat brazing material 85 having a substantially square cross section. The brazing material 85 is guided from above to the brazing material introduction port 341 of the guide block 3 and is arranged with the plate surface direction facing the pair of circumferential conductor end portions 84A and 84B.

Next, a method for joining conductor ends using the joint positioning jig 1 of this example will be described in detail.
In this example, the following first positioning step, second positioning step, and joining step are performed to join the pair of circumferential conductor end portions 84 </ b> A and 84 </ b> B via the brazing material 85.
First, as shown in FIGS. 1 to 3, as the first positioning step, the base member 2 is disposed at the circumferential position of the stator core 7 corresponding to the one-side circumferential conductor end portion 84 </ b> A and the other-side circumferential conductor end portion 84 </ b> B. To do. At this time, the one-side circumferential conductor end portion 84A and the other-side circumferential conductor end portion 84B of the coil 8 disposed on the stator core 7 by the one-side circumferential guide portion 21A and the other-side circumferential guide portion 21B in the base member 2. Are guided inward in the circumferential direction C approaching each other.

Then, as shown in FIGS. 7 and 9, the distance between the base end portion 841 of the one side circumferential conductor end portion 84A and the base end portion 841 of the other side circumferential conductor end portion 84B is guided in the circumferential direction C, When the circumferential position of each circumferential conductor end 84A, 84B is shifted, each circumferential conductor end 84A, 84B is corrected to an appropriate position.
Further, when the base member 2 is disposed on the stator core 7, the one side load receiving portion 22A is disposed below the one side circumferential conductor end portion 84A, and the other side load receiving portion 22B is disposed on the other side circumferential conductor end portion 84B. Place at the bottom.

Next, as shown in FIGS. 4, 10, and 12, the guide block 3 is disposed with respect to the base member 2, and the one-side circumferential conductor end portion 84A is radially connected to the radially inner circumferential side R1 by the one-side inner circumferential guide portion 32A. And the other circumferential guide end 84B is guided to the radially outer circumferential side R2 by the other circumferential guide 32B. At this time, when the one-side circumferential conductor end portion 84A is at a position shifted to the radially outer circumferential side R2, the chamfered portion 331 of the one-side inner circumferential guide portion 32A causes the one-side circumferential conductor end portion 84A to The position can be corrected to the inner circumference side. When the other side circumferential conductor end portion 84B is shifted to the radially inner circumferential side R1, the position of the other side circumferential conductor end portion 84B is set by the chamfered portion 331 of the other side outer circumferential guide portion 32B. Can be corrected to the outer peripheral side.
Thus, even if the one-side circumferential conductor end portion 84A and the other-side circumferential conductor end portion 84B are in a state of being separated from each other, they can be brought into a state where they can be joined.

  Next, as shown in FIGS. 5, 7, and 13, as the second positioning step, the one-side conductor spacing is provided in the radial gap 86 (see FIG. 12) between the one-side circumferential conductor end portion 84A and the one-side facing portion 33A. The lower projection 42 in the formation block 4A is arranged, and the lower projection 42 in the other conductor spacing formation block 4B is arranged in the radial gap 86 between the other circumferential conductor end 84B and the other facing portion 33B. To do. Then, the one-side conductor interval forming block 4A guides the one-side inner circumferential guide portion 84A against the one-side inner periphery guide portion 32A, and the other-side conductor interval forming block 4B guides the other side outer periphery. The other side circumferential conductor end portion 84B is guided in the direction in which it is pressed against the guide portion 32B.

Accordingly, as shown in FIGS. 10 and 13, an insertion gap 87 into which the brazing material 85 can be inserted can be secured between the one side circumferential conductor end portion 84 </ b> A and the other side circumferential conductor end portion 84 </ b> B. . This insertion gap 87 can be stably secured as a gap for inserting the brazing material 85.
In addition, by arranging the conductor spacing forming blocks 4A and 4B, the insertion gap 87 can be stably secured in a portion of the guide block 3 immediately below the brazing material introduction port 341.

  Next, as a joining process, as shown in FIGS. 5, 7, 10, and 13, the brazing material is inserted into the insertion gap 87 between the brazing material introduction port 341 in the guide block 3 and the pair of circumferential conductor ends 84 </ b> A and 84 </ b> B. 85 is inserted. After the insertion of the brazing material 85, the conductor interval forming blocks 4A and 4B can be removed from the guide block 3 and the positioning block 35. Further, the brazing material 85 may be inserted in advance into the brazing material introduction port 341 in the guide block 3 before the guide block 3 is arranged with respect to the base member 2.

Next, as shown in FIGS. 6, 11, and 14, the pair of bonding electrodes 52 are brought close to each other in the radial direction R between the one-side circumferential conductor end portion 84 </ b> A and the other-side circumferential conductor end portion 84 </ b> B. At this time, each joining electrode 52 is arranged in each electrode arrangement recess 342 in the guide block 3, and interference with the guide block 3 can be avoided.
Then, a pair of circumferential conductor end portions 84A and 84B are sandwiched between the pair of joining electrodes 52 by applying a predetermined pressure with the pair of joining electrodes 52 via the brazing material 85, and one side is passed. The circumferential conductor end 84 </ b> A and the other circumferential conductor end 84 </ b> B are joined via the brazing material 85. At this time, the one side circumferential conductor end portion 84A and the other side circumferential conductor end portion 84B are guided to appropriate positions, so that both the conductor end portions 84A and 84B can be joined with high accuracy and stability. it can.

  Therefore, according to the joining portion positioning jig 1 of this example and the joining method of the conductor end portions 84A and 84B using the same, the efficiency of joining operation between the conductor end portions 84A and 84B in the coil 8 can be improved. This joining can be performed accurately and stably.

(Example 2)
This example is an example showing a positioning and bonding apparatus 5 configured using the bonding portion positioning jig 1.
As shown in FIG. 15, the positioning and bonding apparatus 5 of this example includes a bonding portion positioning jig 1, a pair of bonding electrodes 52 </ b> A and 52 </ b> B that can approach each other, and a brazing material storage unit that stores a brazing material 85 wound in a roll shape. 53 and a brazing filler metal feeding portion 54 for feeding a brazing filler metal 85 of a predetermined length from the brazing filler metal storage portion 53 to the insertion gap 87 are arranged with respect to the apparatus base portion 51.
The device base 51 is provided in a moving device such as a robot, and can be moved three-dimensionally with respect to the rotating electrical machine stator 6.

The base member 2 of the bonding part positioning jig 1 is fixed to the apparatus base part 51.
The pair of bonding electrodes 52, the guide block 3, and the conductor interval forming blocks 4 </ b> A and 4 </ b> B (not shown) are configured to be movable with respect to the device base portion 51 fixed to the base member 2. One joining electrode 52A is fixed to the device base 51, and the other joining electrode 52B is configured to approach one joining electrode 52A by a drive source. The guide block 3 is movable relative to the base member 2 and approaches the pair of circumferential conductor ends 84A and 84B from above, so that the one side circumferential conductor end 84A is formed by the one side inner circumferential guide portion 32A. Is guided to the radially inner circumferential side R1, and the other circumferential guide end 32B is guided to the radially outer circumferential side R2 by the other circumferential guide portion 32B.

Although illustration is omitted, the one-side conductor interval forming block 4A is driven by a driving source, and the lower protrusion 42 is formed into a radial gap between the one-side inner circumferential guide portion 32A and the one-side circumferential conductor end portion 84A. 86, and the other-side conductor interval forming block 4B is driven by a drive source, and the lower protrusion 42 is connected to the other-side outer circumferential guide portion 32B and the other-side circumferential conductor end portion 84B. It is configured to be inserted into the radial gap 86.
The brazing material feeding part 54 is configured to sandwich and feed the brazing material 85 by a pair of rollers.

The load receiving portions 22A and 22B are movable with respect to the base member 2, and are arranged so as to be opposed to the lower side of the pair of circumferential conductor end portions 84A and 84B, approaching from the radial outer peripheral side R2 with respect to the stator core 7. It is. The one side circumferential guide portion 21A and the other side circumferential guide portion 21B are fixed to the base member 2 (not shown).
The stator 6 before joining the conductor end portions 84A and 84B holds one of the coil end portions 83 (a pair of circumferential conductor end portions 84A and 84B to be joined) facing upward.

In this example, when joining the conductor end portions 84A and 84B, as shown in FIG. 15, the positioning joining device 5 is moved to the stator 6 for the rotating electrical machine, and the base member 2 in the joining portion positioning jig 1 is moved to the stator core. 7 to the periphery of the joint. Here, also in this example, the structure of the bonding portion positioning jig 1 is the same as that of the first embodiment, and the bonding portion positioning jig 1 is schematically shown.
And load receiving part 22A, 22B is opposingly arranged under a pair of circumferential direction conductor edge part 84A, 84B, and a pair of circumferential direction conductor edge part is formed by 21 A of one side circumferential direction guide parts, and the other side circumferential direction guide part 21B. The interval in the circumferential direction C of 84A and 84B is corrected.

Next, the guide block 3 is moved and arranged with respect to the pair of circumferential conductor ends 84A and 84B, and the pair of conductor interval forming blocks is moved and moved with respect to the pair of circumferential conductor ends 84A and 84B. Deploy. Further, the brazing material 85 is inserted into the brazing material introduction port 341 in the guide block 3, and when the guide block 3 is moved, the brazing material 85 is also sent out simultaneously by the brazing material feeding portion 54.
Next, the lower protrusions 42 of the pair of conductor interval forming blocks are arranged so that the radial gap 86 between the one side inner circumferential guide portion 32A and the one side circumferential conductor end portion 84A, and the other side outer circumferential guide portion 32B and the other side circumference. The insertion gap 87 is formed between the pair of circumferential conductor ends 84A and 84B, and is disposed in the radial gap 86 with respect to the direction conductor end 84B.

Next, the brazing material feeding unit 54 feeds the brazing material 85 having a predetermined length from the brazing material storage unit 53 to the insertion gap 87 between the pair of circumferential conductor end portions 84A and 84B.
Thereafter, the other bonding electrode 52B is brought close to the one bonding electrode 52A, and the pair of circumferential conductor end portions 84A and 84B are sandwiched between the pair of bonding electrodes 52A and 52B via the brazing material 85 and pressurized. A current is passed between the pair of joining electrodes 52A and 52B to join the pair of circumferential conductor ends 84A and 84B through the brazing material 85.

In this example, the entire positioning and bonding apparatus 5 including the bonding portion positioning jig 1 can be brought close to the stator core 7 by a robot or the like to bond the pair of circumferential conductor end portions 84A and 84B. . Therefore, the entire positioning and bonding apparatus 5 can be moved to an arbitrary position, and the efficiency of the bonding operation between the conductor end portions 84A and 84B in the coil 8 can be further improved.
Also in this example, the configuration of the joint positioning jig 1 is the same as that of the first embodiment, and the same effect as that of the first embodiment can be obtained.

DESCRIPTION OF SYMBOLS 1 Joining part positioning jig 2 Base member 21A, 21B Circumferential guide part 22A, 22B Load receiving part 3 Guide block 32A One side inner periphery guide part 32B The other side outer periphery guide part 33A One side opposing part 33B The other side opposing part 341 Wax Material introduction port 342 Electrode placement recess 35 Positioning block 4A, 4B Conductor spacing forming block 5 Positioning joining device 52 Joining electrode 6 Stator for rotating electrical machine 7 Stator core 71 Axial end face 72 Slot 8 Coil 81 Slot conductor part 82 Rising conductor part 83 Coil end Conductor portion 84A, 84B Circumferential conductor end 85 Brazing material 86 Radial gap 87 Insertion gap L Axial direction C Circumferential direction C1 One circumferential side C2 Circumferential other side R Radial direction R1 Radial inner peripheral side R2 Radial outer circumferential side

Claims (9)

In a stator for a rotating electrical machine, one side circumferential conductor end bent to one side in the circumferential direction from a rising conductor portion protruding parallel to the axial direction from the axial end surface of the stator core, and the other side in the circumferential direction from the other rising conductor portion Used to join the other circumferential conductor end overlapping the inner circumferential side of the one circumferential conductor end with a pair of joining electrodes in a state of being arranged in a radial direction via a brazing filler metal A joint positioning jig,
A base member disposed with respect to the axial end surface of the stator core;
A guide block that is disposed on the base member and guides the one side circumferential conductor end and the other side circumferential conductor end to face each other in the radial direction;
Conductor spacing forming means for ensuring an insertion gap into which the brazing material can be inserted between the one side circumferential conductor end and the other side circumferential conductor end;
The guide block has, on the other side in the circumferential direction with respect to the insertion position of the brazing material, a one side inner circumferential guide portion that guides the one side circumferential conductor end to the radial inner circumference side, and the insertion position of the brazing material. On the one side in the circumferential direction, the other side outer circumferential guide portion for guiding the other side circumferential conductor end to the radial outer circumferential side,
The conductor interval forming means guides the one side circumferential conductor end against the one side inner circumferential guide, and guides the other side circumferential conductor to the other outer circumferential guide. It is comprised so that it may guide in the direction which presses a part, The junction part positioning jig characterized by the above-mentioned. 2. The guide block according to claim 1, wherein the guide block is formed so as to face the inner peripheral side with respect to the one side inner peripheral guide part, and the other side formed to face the outer peripheral side with respect to the other side outer peripheral guide part. Having a facing portion,
The conductor interval forming means is arranged on a one-side conductor interval arranged in a radial gap between the one-side circumferential conductor end portion and the one-side facing portion guided to the radially inner periphery side by the one-side inner periphery guide portion. A forming block, and an other-side conductor interval forming block disposed in a radial gap between the other-side circumferential conductor end guided by the other-side outer circumferential guide portion and the other-side facing portion. A joint positioning jig characterized by the above.   The guide block according to claim 1 or 2, wherein the guide block includes a brazing material introduction port for guiding the brazing material into a radial gap between the one side circumferential conductor end and the other side circumferential conductor end. A bonding portion positioning jig, which is formed on both radial sides of a portion where a brazing material introduction port is formed, and has a pair of electrode arrangement concave portions for arranging the pair of bonding electrodes.   4. The base member according to claim 1, wherein the base member is opposed to the lower portion of the one side inner circumferential guide portion and the one side facing portion, and the one side circumferential conductor end portion and the other side. A load receiving portion that receives a load applied from the guide block to the circumferential conductor end portion, a one-side circumferential guide portion that guides the one-side circumferential conductor end portion to the one circumferential side, and the other-side circumference. The other end circumferential guide portion for guiding the other side circumferential conductor end portion to the other circumferential side is provided opposite to the base end portion of the direction conductor end portion. Ingredients. A method of joining the one side circumferential conductor end and the other side circumferential conductor end via the brazing material with the pair of joining electrodes using the joint positioning jig according to claim 1. There,
The base member is arranged at a circumferential position of the stator core corresponding to the one side circumferential conductor end and the other side circumferential conductor end, the guide block is arranged with respect to the base member, and The one-side inner circumferential guide portion guides the one-side circumferential conductor end toward the radially inner periphery, and the other-side outer circumferential guide portion guides the other-side circumferential conductor end toward the radially outer circumferential side. A first positioning step;
The conductor spacing forming means guides the one side circumferential conductor end against the one side inner circumferential guide, and guides the other side circumferential conductor to the other outer circumferential guide. A second positioning step of guiding in the direction in which the portion is pressed and securing an insertion gap into which the brazing material can be inserted between the one side circumferential conductor end and the other side circumferential conductor end;
After the brazing material is inserted into the insertion gap, the pair of joining electrodes are approached from both radial sides of the one-side circumferential conductor end and the other-side circumferential conductor end, and the one-side circumferential conductor A method for joining conductor ends using a joining portion positioning jig, comprising: a joining step of joining an end portion and the other circumferential conductor end portion via the brazing material. 6. The guide block according to claim 5, wherein the guide block includes a first facing portion facing the inner peripheral side with respect to the first inner peripheral guide portion and a second facing portion facing the outer peripheral side with respect to the second outer peripheral guide portion. Aside,
As the conductor interval forming means, the one-side conductor disposed in the radial gap between the one-side circumferential conductor end portion guided by the one-side inner circumference guide portion to the radially inner circumference side and the one-side facing portion. An interval forming block, and an other-side conductor interval forming block disposed in a radial gap between the other-side circumferential conductor end guided by the other-side outer periphery guide portion and the other-side facing portion. Use
In the second positioning step, the one-side conductor spacing forming block is disposed in the radial gap between the one-side circumferential conductor end and the one-side facing portion, and the other-side circumferential conductor end and the A conductor end joining method using a joining part positioning jig, wherein the insertion gap is secured by disposing the other conductor spacing forming block in a radial gap with the other facing part. In Claim 5 or 6, in the guide block, a brazing material introduction port for guiding the brazing material into a radial gap between the one side circumferential conductor end and the other side circumferential conductor end, A pair of electrode placement recesses for placing the pair of bonding electrodes is formed on both sides in the radial direction of the portion where the brazing material introduction port is formed,
In the second positioning step, the insertion gap is ensured at a site directly below the brazing material introduction port,
In the joining step, in the state in which the insertion gap is formed, the brazing material is inserted into the insertion gap from the brazing material introduction port, and a method for joining conductor ends using a joining portion positioning jig . 8. The base member according to claim 5, wherein the base member faces the lower portion of the one-side inner circumferential guide portion and the one-side facing portion, the one-side circumferential conductor end portion, and the other side. A load receiving portion that receives a load applied from the guide block to the circumferential conductor end portion and a proximal end portion of the one circumferential conductor end portion, and the one circumferential conductor end portion is arranged in the circumferential direction. One side circumferential guide portion that guides to one side and the other side circumference that guides the other side circumferential conductor end portion to the other circumferential side opposite to the base end portion of the other side circumferential conductor end portion. With a direction guide,
In the first positioning step, the one-side circumferential guide portion and the other-side circumferential guide portion allow the one-side circumferential conductor end and the other-side circumferential conductor end to approach each other. The joint positioning jig is characterized by receiving a load applied from the guide block to the one side circumferential conductor end and the other side circumferential conductor end by the load receiving portion. Method of joining conductor ends using tools. A positioning joining apparatus using the joint positioning jig according to claim 1,
The positioning bonding apparatus includes the bonding portion positioning jig, the pair of bonding electrodes accessible to each other, a brazing material storage unit for storing the brazing material, and a brazing material having a predetermined length from the brazing material storage unit. A brazing material feed section that feeds into the insertion gap, and is three-dimensionally movable with respect to the rotating electrical machine stator,
And in the said junction part positioning jig | tool, the said positioning block using the junction part positioning jig | tool characterized by arrange | positioning the said guide block and the said conductor space | interval formation means movably with respect to the said base member. apparatus.

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