JP2015171260A - Positioning member, positioning device, and method of manufacturing stator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform positioning of rows of end parts of conductor segments by holding the rows of the end parts between both sides thereof even though positions of the respective rows of the end parts of the conductor segments are varied to a certain extent.SOLUTION: A positioning member is constituted in a positioning device that positions rows of end parts of conductor segments constituting a stator. The positioning device is a device performing positioning of the rows of the end parts by holding the rows of the end parts between the positioning member and another member. The positioning member comprises: an opening part into which the rows of the end parts can be inserted; a first positioning part that is provided on an inner edge of the opening part and comes in contact with one side in a circumference direction of an annular core with respect to a first end part row; and a second positioning part that is provided on an outer edge of the positioning member and comes in contact with one side in the circumference direction of the annular core with respect to a second row of the end parts different from the first row of the end parts.

Description

  The present invention relates to a technique for positioning end rows of conductor segments constituting a stator.

  As a motor stator structure, a structure including an annular core and a plurality of conductor segments attached to the annular core is known. In the case of this structure, the ends of the two conductor segments protrude from the annular core in the direction of the central axis thereof, and the end pairs are arranged in a row in the radial direction of the annular core. The end pairs are joined by welding or the like. In order to perform a joining operation smoothly, an apparatus for positioning an end pair in an end row unit has been proposed (for example, Patent Documents 1 to 3).

  Patent Document 1 discloses an apparatus for positioning an end row by inserting a jig between adjacent end rows. Patent Document 2 and Patent Document 3 disclose an apparatus that positions each end row by sandwiching each end row by two plates in which a plurality of holes into which each end row is inserted is formed. Has been.

JP2013-017273A Japanese Patent No. 4114588 JP 2005-224028 A

  In the case of the method of Patent Literature 1, the jig is supported only on one side of the end row as viewed in the circumferential direction of the annular core. Therefore, there is a possibility that the end portion pair is shifted to the opposite side to the jig. In the case of the methods of Patent Documents 2 and 3, since the end rows are sandwiched from both sides when viewed in the circumferential direction of the annular core, the problem of Patent Document 1 can be solved. However, it is necessary to insert each end row into each hole of two plates at the same time, and the original position accuracy of each end row is highly accurate for the alignment between the hole and the end row. It is considered to be required. For this purpose, it is required to adjust the position in advance to eliminate the variation in the position of each end row, or to improve the assembly accuracy of the conductor segment to the annular core.

  An object of the present invention is to make it possible to position the end rows by sandwiching the end rows from both sides even if the positions of the end rows of the plurality of conductor segments attached to the annular core vary to some extent. is there.

  According to the present invention, there is provided a positioning member configured in a positioning device for positioning an end row of conductor segments constituting a stator, wherein the stator includes an annular core and a plurality of the conductors attached to the annular core. And the end row is a row of end portions of the plurality of conductor segments arranged in the radial direction of the annular core, and the end row is formed in a plurality of rows in the circumferential direction of the annular core. The positioning device is a device that positions the end row by sandwiching the end row by the positioning member and another member, and the positioning member has an opening into which the end row can be inserted. Provided on the inner edge of the opening, the first positioning portion that contacts one side in the circumferential direction of the annular core with respect to the first end row, and provided on the outer edge of the positioning member, Before the first Comprising a second positioning portion abutting on the one side in the circumferential direction of the annular core against the end column and the different second of the end column, a positioning member, wherein are provided that.

  According to the present invention, there is provided a positioning device for positioning an end row of conductor segments constituting a stator, wherein the stator includes an annular core and a plurality of the conductor segments attached to the annular core. The end row is a row of end portions of the plurality of conductor segments arranged in the radial direction of the annular core, and the end row is formed in a plurality of rows in the circumferential direction of the annular core, and the positioning The apparatus includes a first positioning member including a first opening into which the end row can be inserted, and a second opening into which an end row different from the end row can be inserted, with respect to the first positioning member. A second positioning member arranged to be shifted in the central axis direction of the annular core, the first positioning member and the second positioning member, a position sandwiching the end row and a position spaced from the end row Move to move between And the inner edge of the first opening and the outer edge of the second positioning member are each a first end of a plurality of the end rows along with the movement by the moving mechanism. A first positioning portion is provided for defining the position of the row from both sides in the circumferential direction, and the inner edge of the second opening and the outer edge of the first positioning member are each moved by the moving mechanism. A positioning device is provided, comprising a second positioning portion that defines a position of a second end row of the plurality of end rows from both sides in the circumferential direction.

  Further, according to the present invention, there is provided a method for manufacturing a stator, wherein the stator includes an annular core and a plurality of conductor segments attached to the annular core, and an end portion pair of the two conductor segments includes: An end row arranged in the radial direction of the annular core is formed, and the end row is formed in a plurality of rows in the circumferential direction of the annular core, and the manufacturing method includes the step of arranging the end row by the positioning device. There is provided a method for manufacturing a stator, comprising: a step of positioning; and a step of sequentially welding individual end pairs constituting the positioned end column.

  According to the present invention, even if the positions of the end rows of the plurality of conductor segments attached to the annular core vary to some extent, the end rows can be sandwiched from both sides and positioned.

Explanatory drawing of the manufacturing apparatus to which the positioning apparatus which concerns on one Embodiment of this invention is applied. Explanatory drawing which shows a part of positioning device. Explanatory drawing of a moving mechanism. Explanatory drawing of a positioning member. Explanatory drawing of a control unit. Explanatory drawing of the example of positioning operation | movement. Explanatory drawing of the example of positioning operation | movement. Explanatory drawing of the example of positioning and a welding procedure. Explanatory drawing of the positioning member of another example. Explanatory drawing of the positioning member of another example.

  Hereinafter, embodiments of the present invention will be described. In each figure, an arrow Z indicates a vertical direction, and arrows X and Y indicate horizontal directions orthogonal to each other.

  FIG. 1 is an explanatory diagram of a manufacturing apparatus A including a positioning device 2 according to an embodiment of the present invention. The manufacturing apparatus A is an apparatus that manufactures a stator 100 including an annular core 101 and a plurality of conductor segments 102 attached to the annular core 101, and is an apparatus that welds adjacent pairs of end portions of the plurality of conductor segments 102. . The manufacturing apparatus A includes a welding apparatus 1, a positioning apparatus 2, and a pair of rails 3 and 3.

<Welding equipment>
The welding apparatus 1 includes a welding unit 11, an elevating unit 12, a movable rail 13, a pair of fixed rails 14 and 14, and a plurality of support columns 15. The welding unit 11 includes, for example, a positive electrode welding portion (welding torch), and welds adjacent end pairs of the plurality of conductor segments 102 from above.

  The elevating unit 12 includes a mechanism for supporting the welding unit 11 and elevating the welding unit 11 in the Z direction. The movable rail 13 extends in the Y direction, supports the lifting unit 12 and guides the movement of the lifting unit 12 in the Y direction.

  The pair of fixed rails 14 and 14 are respectively extended in the X direction and support the end portions of the movable rail 13. The movable rail 13 is installed and supported on a pair of fixed rails 14 and 14, and the pair of fixed rails 14 and 14 guide the movement of the movable rail 13 in the X direction. Each fixed rail 14 is horizontally supported by two support columns 15 that are spaced apart in the X direction.

  In the welding apparatus 1 having such a configuration, the welding unit 11 can be moved in the Z direction by the lifting unit 12, and the welding unit 11 can be moved in the Y direction by the movement of the lifting unit 12 by the guide of the movable rail 13. Further, the welding unit 11 can be moved in the X direction by the movement of the movable rail 13 guided by the pair of fixed rails 14 and 14. In this way, the welding unit 11 can be moved in the three-dimensional direction, and can be moved to the welding site.

  A known mechanism is employed as a mechanism for lifting and lowering the welding unit 11 by the lifting unit 12, a moving mechanism for the lifting unit 12 guided by the movable rail 13, and a moving mechanism for the movable rail 13 guided by the pair of fixed rails 14 and 14. For example, it can be composed of a driving source such as a motor and a transmission mechanism (for example, a belt transmission mechanism, a ball screw mechanism, a rack-pinion mechanism, etc.) that transmits the driving force of the driving source. In addition, by providing a sensor that detects the amount of movement of these components, position control of these components can be performed. The moving mechanism of the welding unit 11 is not limited to such a linear motion mechanism, and may be, for example, an articulated robot.

<Positioning device>
The positioning device 2 will be described with reference to FIGS. FIG. 2 is an explanatory diagram showing a part of the positioning device 2, and FIG. 3 is an explanatory diagram of the moving mechanisms 241 and 251 provided in the positioning device 2.

  First, the support structure of the stator 100 will be described with reference to FIG. The positioning device 2 includes a base member 28 and a rotation mechanism 29. The base member 28 has a rectangular plate shape, and a plurality of sliders 3a are provided on the lower surface thereof. The pair of rails 3 and 3 are separated from each other in the Y direction, and each rail 3 extends in the X direction. The slider 3 a engages with the rail 3 and slides on the rail 3. Thereby, the base member 28 is movable in the X direction.

  The base member 28 is provided with a moving mechanism (not shown), and is reciprocated in the X direction. For example, when the unprocessed stator 100 to be welded is carried in, the base member 28 is moved to the right end position of the rail 3 in FIG. 1, and the stator 100 is mounted on the rotation mechanism 29. Thereafter, the welding operation is performed by moving to the position shown in FIG. When the welding operation is completed, it is moved again to the right end position of the rail 3 in FIG. 1 and the stator 100 is carried out.

  The rotation mechanism 29 is mounted on the base member 28. The rotation mechanism 29 includes a rotation unit that rotates around a rotation center a that extends in the Z direction, and a drive unit that rotates the rotation unit (for example, a drive source such as a motor and a transmission mechanism such as a gear mechanism). By providing a sensor that detects the amount of rotation of the rotating unit, the amount of rotation can be controlled.

  The annular core 101 is mounted on the rotating part. The annular core 101 is supported by the rotating portion in a posture in which the central axis direction is concentric with the rotation center a and is in the vertical direction. By the rotation of the rotating part, as shown by the arrow b, the annular core 101 can also rotate in both directions around the rotation center a.

  Next, mainly referring to FIGS. 2 and 3, the positioning device 2 includes a rectangular plate-like support member 21. The support member 21 has a hole (opening) 21a formed at the center thereof. The welding unit 11 can advance below the support member 21 through the hole 21a.

  The support member 21 is supported in a horizontal posture by the elevating body 22. The elevating body 22 is a mechanism that moves in the Z direction by the elevating mechanism 23. Movement mechanisms 241 and 251 are supported on the lower surface of the support member 21 so as to be separated from each other in the X direction. The moving mechanism 241 is a mechanism that moves the movable bodies 242 and 242 separated in the Y direction in directions close to or away from each other. The moving mechanism 251 is the same mechanism as the moving mechanism 241. The moving mechanism 251 is a mechanism that moves the movable bodies 252 and 252 separated in the Y direction in directions close to or away from each other.

  A support plate 243 is supported in a horizontal position on one of the two movable bodies 242 via a spacer 244, and a support plate 243 is directly supported in a horizontal position on the other of the two movable bodies 242. For this reason, the two support plates 243 are offset in the Z direction by the height of the spacer 2244.

  A support plate 253 is supported in a horizontal posture on one of the two movable bodies 252 via a spacer 254, and a support plate 253 is directly supported in a horizontal posture on the other of the two movable bodies 252. For this reason, the two support plates 253 are offset from each other in the Z direction by the height of the spacer 2254.

  Conductor segments are provided on one side of the two support plates 243 in the Y direction (front side in FIG. 2 and on the left side in FIG. 3) and on one side of the two support plates 253 in the Y direction (front side in FIG. 2). A positioning member 26 for positioning the end row 102 is supported. In addition, on the other side in the Y direction of the two support plates 243 (the rear side in FIG. 2 and on the right side in FIG. 3) and the other side in the Y direction of the two support plates 253 (the rear side in FIG. 2), A positioning member 27 for positioning the end row of the conductor segment 102 is supported. The positioning members 26 and 27 are plate-like members extending in the X direction, and both end portions in the X direction are supported by the support plates 243 and 253. In other words, the positioning member 26 (or positioning member 27) is provided from the support plate 243 to the support plate 253 on one side in the Y direction (or the other side in the Y direction).

  As described above, the two support plates 243 are offset in the Z direction, and the two support plates 253 are also offset in the Z direction. The positioning member 26 is supported on the upper surfaces of the support plates 243 and 253 located on the lower side, and the positioning member 27 is supported on the lower surfaces of the support plates 243 and 253 located on the upper side. Thus, the positioning members 26 and 27 are arranged so as to be shifted from each other in the Z direction, and the positioning member 26 is arranged on the lower side and the positioning member 27 is arranged on the upper side.

  By positioning the moving mechanisms 241 and 251, the positioning members 26 and 27 can move in the Y direction. FIG. 3 shows the movement mode. State ST1 shows a state in which the two movable bodies 252 are most separated in the Y direction. The moving mechanisms 241 and 251 are driven synchronously, and in the state ST1, the two movable bodies 242 (not shown) are also most distant from each other in the Y direction. State ST2 shows a state in which the two movable bodies 252 are closest to each other in the Y direction. The moving mechanisms 241 and 251 are driven synchronously. In the state ST2, the two movable bodies 242 (not shown) are also closest to each other in the Y direction.

  As the movable bodies 242 and 252 move, the positioning members 26 and 27 move in parallel in the Y direction. In the state ST1, the overlap between the positioning member 26 and the positioning member 27 is the smallest, and in the state ST2, the overlap between the positioning member 26 and the positioning member 27 is the largest. By positioning the positioning members 26 and 27, the end rows of the conductor segments 102 are positioned, details of which will be described later.

  In this embodiment, the positioning members 26 and 27 are configured to move in parallel with each other. However, the positioning members 26 and 27 may be configured to rotate. As the elevating mechanism 23 and the moving mechanisms 241 and 251, known mechanisms can be adopted, for example, actuator mechanisms driven by a fluid such as air. Or it can be set as the drive mechanism comprised from drive sources, such as a motor, and the transmission mechanism (For example, a belt transmission mechanism, a ball screw mechanism, a rack-pinion mechanism, etc.) which transmits the drive force of a drive source. In addition, by providing a sensor that detects the amount of movement of these components, position control of these components can be performed.

  Next, the positioning members 26 and 27 will be described with reference to FIGS. FIG. 4 is an explanatory diagram of the positioning members 26 and 27.

  The positioning member 26 includes a main body portion 261. The main body 261 is a plate-like member that is long in the X direction and has a rectangular outer shape, and an opening 261a is formed at the center thereof. In the case of this embodiment, the opening 261a is a rectangular hole whose periphery is closed, and penetrates the main body 261 in the thickness direction. The opening 261a may be such a through hole, or may be a C-shaped or U-shaped notch with a part of the periphery thereof opened. The opening 261a has a size capable of inserting an end row LN described later.

  Convex portions 261c and 261c are integrally formed on both sides in the Y direction of the main body portion 261, and a concave portion 261b is formed between the convex portions 261c and 261c. The main body 261 can be formed of a conductive member such as metal, and is used together with the positive electrode of the welding unit 11 at its end (for example, the end on the central axis side of the annular core 101). A connecting portion (for example, a screw hole) 261d to which a ground electrode is connected can be provided. The ground electrode connected to the connection portion 261d can be connected to, for example, a wiring 4a arranged as shown by a broken line in FIG. Thereby, positioning member 26 itself can be used as a ground electrode.

  Positioning portions 262 and 263 that open toward one side in the Y direction (rear side in FIG. 4) are integrally provided at the portion of the opening 261a in the convex portions 261c and 261c of the main body 261. . The positioning part 262 is formed on the inner edge of the opening 261a in the first convex part 261c. More specifically, the positioning part 262 is formed on one side parallel to the X direction among the four sides of the opening 261a. The positioning part 263 is formed on the side opposite to the inner edge of the opening 261a in the second convex part 261c (that is, on the outer edge of the second convex part 261c). More specifically, the positioning unit 263 is formed on one side of the four sides forming the outer edge of the main body 261 that is parallel to the X direction and opposite to the side on which the positioning unit 262 is formed. ing.

  The positioning portions 262 and 263 include a plurality of guide portions 2621 and 2631 for positioning an end pair PE described later. In the case of this embodiment, each guide part 2621,2631 is a notch part opened to the Y direction, and the cross-sectional shape in XY plane has comprised V shape. The V-shape is formed from a bottom surface BS and a pair of slopes SS. The pair of slopes SS are inclined so as to gradually approach each other when viewed in the depth direction, and the bottom surface BS forms a flat surface that linearly connects the deepest portions of the pair of slopes SS.

  As a result of forming the guide portion 2621, a protruding portion protruding in the Y direction is formed between the adjacent guide portions 2621, and a plurality of protruding portions are formed at intervals in the X direction.

  In addition, the shape of the guide parts 2621 and 2631 is not limited to a V-shaped cross section, and may be, for example, a U shape or a square shape.

  The positioning member 27 may have a shape different from that of the positioning member 26, but in the case of the present embodiment, the positioning member 27 is a member having the same shape. This is advantageous in terms of manufacturing cost and the like. Briefly, like the positioning member 26, the positioning member 27 includes a main body portion 271, an opening portion 271a, a concave portion 271b, a convex portion 271c, and positioning portions 272 and 273, and the positioning portions 272 and 273 include a plurality of guide portions. 2721 and 2731 are provided. The positioning member 27 can also be provided with a ground electrode connecting portion 271d at the end on the central axis side, and the ground electrode connected to the connecting portion 271d is arranged, for example, as depicted by a broken line in FIG. The connected wiring 4b can be connected.

  The positioning portions 262 and 263 are provided so as to protrude larger than the convex portions 261c and 261c, respectively. Similarly, the positioning portions 272 and 273 are provided so as to protrude larger than the convex portions 271c and 271c, respectively. Accordingly, when the positioning members 26 and 27 are overlapped with each other in the posture of FIG. 4, that is, in a state where the projecting side surfaces of the convex portion 261 c and the convex portion 271 c face each other, the positioning unit 262, the positioning unit 273, The positioning part 272 can be positioned so as to face each other. In the case of this embodiment, the thickness of the positioning part in the normal direction is formed with the same thickness dimension. Further, the positioning portions 263 and 273 formed on the outer edges of the positioning members 26 and 27 are formed to extend in the radial direction so as to be able to be inserted into the openings 261a and 271a of the other positioning member.

<Control unit>
FIG. 5 is a block diagram of the control unit 5 of the manufacturing apparatus A. The control unit 5 controls the entire manufacturing apparatus A.

  The control unit 5 includes a processing unit 51 such as a CPU, a storage unit 52 such as a RAM and a ROM, an interface unit 53 that interfaces an external device (input device 55, output device 54, host computer) and the processing unit 51, including. The interface unit 53 includes a communication interface for performing communication with the host computer in addition to the I / O interface. The host computer is, for example, a computer that controls the entire facility where the manufacturing apparatus A is installed.

  The processing unit 51 executes a program stored in the storage unit 52 and controls detection state management of the input device (for example, various sensors) 55 and operation of the output device 54 (for example, various actuators) 54. The input device 55 includes the various sensors described above, and the output device 54 includes the various drive sources described above.

<Example of positioning>
An example of positioning of the end rows of the conductor segments 102 by the positioning members 26 and 27 will be described with reference to FIGS. 3, 6 and 7. 6 and 7 are explanatory views of an example of the positioning operation, and show a state during the positioning. First, the general arrangement | positioning aspect of the conductor segment 102 which this embodiment assumes with reference to FIG. 6 is demonstrated.

  The annular core 101 is formed with a plurality of slots 101a opened radially on the inner peripheral surface thereof. The slot 101a penetrates the annular core 101 in the central axis direction. The conductor segment 102 is substantially U-shaped in its original form, and its two legs are inserted with the tooth portion 101b between the adjacent slots 101a and 101a interposed therebetween. The end E of the conductor segment 102 protrudes from the end surface of the annular core 101, and the ends E and E of the separate conductor segments 102 adjacent in the circumferential direction of the annular core 101 constitute an end pair PE. The end pairs PE are arranged in the radial direction of the annular core 101 to form an end row LN. One end row LN is formed between adjacent slots 101a (in other words, on the tooth portion 101b), and a plurality of rows are formed radially.

  The positioning members 26 and 27 position the end pair PE for each end row LN. With reference to FIGS. 6 and 7, in the case of the present embodiment, two adjacent end rows LN are simultaneously positioned. As shown in FIGS. 3 and 6, the positioning members 26 and 27 are arranged so as to overlap in the central axis direction (Z direction) of the annular core 101. In particular, as shown in FIG. 3, the convex portion 261c of one of the positioning members 26 (right side in FIG. 3) overlaps with the concave portion 271b of the positioning member 27, and one of the positioning members 27 (left side in FIG. 3). The convex portion 271 c overlaps with the concave portion 261 b of the positioning member 26. In the case of the present embodiment, these are in contact, but may not be in contact.

  The relative positional relationship between the positioning members 26 and 27 and the stator 100 is set in advance so that the end row LN is positioned directly below the openings 261a and 271a. As shown in FIG. 7, each guide portion 262 formed on the inner edge of the positioning member 26 is disposed so as to face each guide portion 273 formed on the outer edge of the positioning member 27 in the circumferential direction of the annular core 101. In particular, they are arranged so that their bottom surfaces BS face each other. Similarly, each guide portion 263 formed on the outer edge of the positioning member 26 is disposed so as to face each guide portion 272 formed on the inner edge of the positioning member 27 in the circumferential direction of the annular core 101, The bottom surfaces BS of each other are arranged to face each other.

  Next, a procedure for welding the end pair PE will be described with reference to FIG. FIG. 8 is an explanatory diagram of an example of positioning and welding procedures. First, the position in the circumferential direction of the two end rows LN adjacent in the circumferential direction of the annular core 101 to be welded is moved to a position directly below the positioning members 26 and 27 as shown in the state ST11. Let The movement is performed by rotating the stator 100 by the rotation mechanism 29.

  Next, the support member 21 is lowered by the lifting mechanism 23. As a result, as shown in the state ST12, the positioning members 26 and 27 are lowered, and the first (leftward in FIG. 8) end row LN of the two end row LNs to be welded is the opening 261a. In addition, the second end row LN (right side in FIG. 8) is inserted into each of the openings 271a. The opening amounts of the opening portions 261a and 271a of the positioning members 26 and 27 change depending on the overlapping state of the positioning members 26 and 27. As shown in the state ST1 in FIG. 3, the opening amounts of the openings 261a and 271a before insertion of the end row LN are maximized so that the opening amounts of the openings 261a and 271a are maximized. It is preferable to set the position 242 and the movable bodies 252 and 252 at the most spaced positions.

  Next, the moving mechanisms 241 and 251 are driven to bring the movable bodies 242 and 242 and the movable bodies 252 and 252 close to each other. As a result, the positioning members 26 and 27 move in a direction overlapping each other in the Y direction. 6 and 7 show a state in the middle of the state, and a state ST13 in FIG. 8 shows a state in which the movement is completed (a state in which the positioning members 26 and 27 are positioned at a positioning position to be a sandwiching position).

  Before the movement mechanisms 241 and 251 are driven, the positioning portion 262 and the positioning portion 273 are separated from the end row LN inserted into the openings 261a and 271a. The distance between the positioning unit 262 and the positioning unit 273 is gradually reduced by driving the moving mechanisms 241 and 251. Similarly, the interval between the positioning portion 263 and the positioning portion 272 gradually decreases. As a result, each of the end rows LN inserted into the opening 261a and the opening 271a is positioned on both sides in the circumferential direction of the annular core 101 (here, Y) by the positioning portion 262, the positioning portion 273, the positioning portion 263, and the positioning portion 272. The position is defined by being sandwiched from both directions. When viewed in the circumferential direction of the annular core 101, the positioning portion 262 abuts on one side (left side in FIG. 8) of the first end row LN, and the positioning portion 273 is on the other side of the first end row LN ( It abuts on the left side in FIG. Further, the positioning portion 263 contacts one side (left side in FIG. 8) of the second end row LN, and the positioning portion 272 contacts the other side (right side in FIG. 8) of the second end row LN. Touch. At this time, each end pair PE constituting the end row LN is positioned in the radial direction of the annular core 101 by the guidance of the inclined surface SS, and is positioned in the circumferential direction of the annular core 101 by contact with the bottom surface BS. Is made.

  Next, a welding operation is performed by the welding apparatus 1 in a state where each end pair PE is positioned. The welding unit 11 is sequentially moved to each end pair PE to weld the end pair PE. As the order of the welding work, for example, each end pair PE may be sequentially welded in units of end row LN. Since the welding operation moves to the next row after the end of one row, it becomes easy to secure the cooling time for the welded row.

  When the welding of all end pairs PE of the end rows LN for two rows is completed, the welding operation for the next end row LN for two rows is started. Therefore, first, the welding unit 11 is retracted. In order to release the positioning of the end column LN after completion of the operation, the moving mechanisms 241 and 251 are driven to move the positioning members 26 and 27, and the positioning units 262 and 263 and the positioning units 272 and 273 are moved into the two end columns. Separated from LN. When the support member 21 is raised by the elevating mechanism 23, the positioning members 26 and 27 are raised and the state returns to the state ST11 in FIG. Then, the rotation mechanism 29 rotates the stator 100 by two rows, and moves the two end row LNs to be welded to the positions directly below the positioning members 26 and 27. Thereby, the edge part row | line | column LN used as welding object can be replaced. Thereafter, the end portion pair PE of all end portion rows LN is positioned and welded in the same procedure, and the operation is completed.

  In this embodiment, the combinations of the positioning portions 262, 263, 272, and 273 sandwiching the end row LN are the inner edge of the opening (262, 272) and the outer edge of the positioning member (263, 273). ing. As a result, there is one opening (opening 261a or opening 271a) through which one end row LN to be positioned is inserted. A margin can be given to the size of the opening with respect to the end row LN, and the proximity-separation distance between the opposing positioning portions can be made larger. Therefore, even if the position of each end row LN varies to some extent, the end row LN can be sandwiched from both sides and positioned.

  In addition, since one opening portion can be provided in one end row LN, the allowable range of the position accuracy of the end portion row LN in the previous process before positioning by the positioning device 2 can be set large. That is, the allowable range of the assembly quality of the stator in the previous process, in other words, the allowable range of the conductor segments that can be attached to the annular core can be widened, and the stator manufacturing efficiency in the entire stator manufacturing system can be improved.

  Moreover, this embodiment is a structure which performs a positioning and welding operation | work sequentially for every one edge part row | line | column LN by replacement | exchange of the welding object by the rotation mechanism 29. This can also cope with the variation in the position of each end row LN, compared to the configuration in which the positioning of all end rows LN is performed simultaneously.

  In this embodiment, when the welding object is replaced, the stator 100 side is moved (rotated) by the rotation mechanism 29, but relative displacement between the end row LN and the positioning members 26 and 27 may be caused. Therefore, the positioning members 26 and 27 may be moved. Further, the positioning members 26 and 27 are moved up and down by the lifting mechanism 23. However, it is only necessary that the relative displacement between the end row LN and the positioning members 26 and 27 can be generated. It is good also as a structure which goes up and down.

<Other examples of positioning members>
In the above-described embodiment, the two adjacent end rows LN are positioned at the same time. However, when viewed in the circumferential direction of the annular core 101, two end rows LN separated by a plurality of rows are positioned. You may comprise so that it may carry out simultaneously. 9 and 10 show an example. Of the components of the positioning members 26 'and 27' shown in the figure, the components corresponding to the positioning members 26 and 27 described above are given the same reference numerals, and the description thereof is omitted. Hereinafter, different configurations will be described.

  The positioning member 26 ′ is wider in the Y direction than the positioning member 26, and the opening 261 a is also formed wider. The positioning member 27 'has the same shape as the positioning member 26'. Since the openings 261a and 271a become larger, the ability to cope with variations in the position of each end row LN is improved. Further, it is possible to cope with positioning of the end row LN in the stator designed so that the interval between the adjacent end row LN is narrower.

  When the end row LN is positioned, another end row LN not to be welded this time is present between the two end row LNs to be welded. Another end row LN is inserted into both the openings 261a and 271a. The amount of rotation of the stator 100 by the rotation mechanism 29 at the time of replacement of the welding target is, for example, 1 row → 2 rows → 1 row → 2 rows, as viewed in the end row LN. . . It becomes.

Claims (11)

A positioning member configured in a positioning device for positioning an end row of conductor segments constituting a stator,
The stator includes an annular core and a plurality of the conductor segments attached to the annular core,
The end row is a row of end portions of the plurality of conductor segments arranged in the radial direction of the annular core,
The end row is formed in a plurality of rows in the circumferential direction of the annular core,
The positioning device is a device that positions the end row by sandwiching the end row by the positioning member and another member,
The positioning member is
An opening into which the end row can be inserted;
A first positioning portion that is provided at an inner edge of the opening, and abuts against one side in a circumferential direction of the annular core with respect to the first end row;
A second positioning portion that is provided on an outer edge of the positioning member and abuts on one side in the circumferential direction of the annular core with respect to the second end portion row different from the first end portion row;
Comprising
A positioning member. The positioning member according to claim 1,
The end row is configured by arranging a pair of end portions of the two conductor segments adjacent in the circumferential direction in the radial direction,
The first positioning part and the second positioning part include a plurality of guide parts for positioning the individual end part pairs constituting the end part row,
A positioning member. A positioning device for positioning end rows of conductor segments constituting a stator,
The stator includes an annular core and a plurality of the conductor segments attached to the annular core,
The end row is a row of end portions of the plurality of conductor segments arranged in the radial direction of the annular core,
The end row is formed in a plurality of rows in the circumferential direction of the annular core,
The positioning device includes:
A first positioning member comprising a first opening into which the end row can be inserted;
A second positioning member that is provided with a second opening into which an end row different from the end row can be inserted, and that is displaced with respect to the first positioning member in the central axis direction of the annular core;
A moving mechanism for moving the first positioning member and the second positioning member between a position sandwiching the end row and a position spaced from the end row;
The inner edge of the first opening and the outer edge of the second positioning member respectively move the first end row of the plurality of rows of the end rows in the circumferential direction as the moving mechanism moves. It has a first positioning part that defines its position across both sides,
Each of the inner edge of the second opening and the outer edge of the first positioning member moves the second end row of the plurality of rows in the circumferential direction in accordance with the movement by the moving mechanism. A second positioning part for defining the position sandwiched from both sides,
A positioning device characterized by that. The positioning device according to claim 3,
A rotation mechanism for mounting the annular core in a posture in which the central axis direction is a vertical direction;
An elevating mechanism that relatively elevates and lowers the first positioning member and the second positioning member, and the annular core;
The rotating mechanism rotates the annular core on which the conductor segment is mounted in order to change the position of the end row inserted into the first opening and the second opening.
A positioning device characterized by that. The positioning device according to claim 3 or 4,
The end row is configured by arranging a pair of end portions of the two conductor segments adjacent in the circumferential direction in the radial direction,
The first positioning portion and the second positioning portion include a plurality of guide portions for positioning the individual end portion pairs constituting the end portion row,
A positioning device characterized by that. The positioning device according to claim 5,
Each of the guide portions is a notch portion having a V-shaped cross section,
The notch is
A pair of slopes for positioning in the radial direction in the end pair;
A bottom surface for positioning in the circumferential direction in the end pair,
A positioning device characterized by that. The positioning device according to any one of claims 3 to 6,
The positioning portion of the inner edge of the first opening and the positioning portion of the outer edge of the second positioning member are arranged to face each other in the circumferential direction,
The positioning portion of the inner edge of the second opening and the positioning portion of the outer edge of the first positioning member are disposed to face each other in the circumferential direction.
A positioning device characterized by that. The positioning device according to claim 5 or 6,
The first positioning member and the second positioning member are arranged to overlap in the central axis direction of the annular core,
By providing the first positioning portion and the second positioning portion of one positioning member of the first positioning member and the second positioning member so as to protrude toward the other positioning member, The plurality of guide portions of the first positioning portion and the plurality of guide portions of the other first positioning portion are opposed to each other, and the plurality of guide portions of one second positioning portion and the other second portion The plurality of guide portions of the positioning portion are opposed to each other,
A positioning device characterized by that. The positioning device according to any one of claims 3 to 8,
Each of the first opening and the second opening has a size capable of inserting a plurality of the end rows,
The second end row is an end row separated from the first end row by a plurality of rows in the circumferential direction.
A positioning device characterized by that. The positioning device according to any one of claims 3 to 9,
The first positioning member and the second positioning member are conductive members, and include a connection portion to which a ground electrode is connected.
The positioning device further includes a welding unit including a positive electrode weld used with the ground electrode.
A positioning device characterized by that. A method for manufacturing a stator, comprising:
The stator includes an annular core and a plurality of conductor segments attached to the annular core;
The pair of end portions of the two conductor segments form an end row arranged in the radial direction of the annular core;
The end row is formed in a plurality of rows in the circumferential direction of the annular core,
The manufacturing method includes:
The step of positioning the end row by the positioning device according to any one of claims 3 to 10,
Sequentially welding individual end pairs constituting the positioned end rows.
A stator manufacturing method characterized by the above.

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