A single-slot clamping device for X-pin stator welding

Abstract

The invention discloses an X-pin stator welding single-slot clamping device, which relates to the technical field of laser welding of X-pin flat wire motors, and comprises an X-pin stator, a positioning seat, a wire clamping tool, and a back-leaning tool; the wire clamping tool comprises an outer positioning disk: an outer positioning guide groove, an outer positioning push groove, a push block, a first reset spring, a drive bolt, a first follower block, a second reset spring, an adjustment gasket, and a positioning pin, and an inner positioning disk: an inner positioning disc, an inner positioning cylinder, an inner positioning guide groove, a third reset spring, a second follower block, and a cover plate; the single-slot single-drive design of the invention can independently adjust the clamping force according to the actual state of the copper wire; the clamping force of each slot is accurately controlled to ensure the perfect fit between the welding device and the stator X-pin overlap end, thereby improving the consistency and reliability of welding; it can adapt to the size and shape differences of copper wires in different slots, provide a sufficiently large clamping force, and ensure that all copper wires can reach an ideal welding state during the welding process.

Description

Technical Field

[0001] The invention relates to the technical field of laser welding of X-pin flat wire motors, in particular to a single-slot clamping device for welding an X-pin stator. Background Art

[0002] In the field of new energy motors, with the continuous advancement of technology and the growth of market demand, the performance requirements of motors are also constantly increasing. As a new type of motor winding technology, the X-pin winding method has been favored by many manufacturers at home and abroad because it can bring higher power density and electric drive efficiency. This winding method optimizes the magnetic field distribution inside the motor through a special coil arrangement and connection method, thereby improving the efficiency and performance of the motor.

[0003] However, the X-pin winding method also faces some technical challenges in the actual production process, especially in the welding of the motor stator. The welding quality is directly related to the reliability and life of the motor, and the quality of the solder joint often depends on the fit between the welding clamp and the stator X-pin overlap. If the fit is not ideal, it may cause burns and other adverse phenomena when the high-energy laser penetrates the copper wire paint film, affecting the overall performance of the motor.

[0004] At present, most welding clamping devices on the market are of linkage design. This design uses a master drive to synchronously control the clamping action of multiple slots. Although it improves production efficiency to a certain extent, it also brings some problems. When the overlap state of the stator X-pin end of a certain slot is not ideal, the linkage clamping device cannot be adjusted individually, which will lead to poor overall clamping effect and affect the welding quality. In addition, since the copper wires in different slots may have slight size differences or shape changes, the linkage clamping device cannot flexibly adapt to these changes, making it difficult to ensure consistency and reliability during the welding process.

[0005] In order to solve these problems and improve the welding quality and production efficiency of X-pin winding motors, it is necessary to develop a new type of welding clamping device. This device should be able to achieve independent control of each slot and make precise adjustments according to the actual conditions of each slot to ensure the fit and welding quality of each weld. At the same time, the new device should also have a high level of automation and intelligence to meet the efficient operation requirements of modern production lines.

[0006] In summary, although the X-pin winding method has many advantages, the technical challenges it faces in the motor stator welding process cannot be ignored. Developing an efficient and accurate welding clamping device that can adapt to this winding method is of great significance to promoting the development and application of new energy motor technology. Summary of the invention

[0007] The purpose of the present invention is to provide a single-slot clamping device for X-pin stator welding, so as to solve the problem mentioned in the above background technology that most welding clamping devices on the market are of linkage design. This design synchronously controls the clamping action of multiple slots through a total drive. Although it improves production efficiency to a certain extent, it also brings some problems. When the overlapping state of the stator X-pin end of a certain slot is not ideal, the linkage clamping device cannot be adjusted individually, which will lead to poor overall clamping effect and affect the welding quality. In addition, since the copper wires in different slots may have slight size differences or shape changes, the linkage clamping device cannot flexibly adapt to these changes, making it difficult to ensure consistency and reliability during the welding process.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an X-pin stator welding single-slot clamping device, comprising an X-pin stator and a positioning seat is arranged at the bottom, a wire clamping tool is arranged at the top, and a back-rest tool is arranged on the top of the wire clamping tool; the wire clamping tool comprises a coaxial outer positioning plate and an inner positioning plate, and the top surfaces of the two positioning plates are connected into one body by a cover plate; the outer positioning plate comprises a cylindrical outer positioning cylinder and a radially extending outer positioning folded edge is arranged at the top of the outer positioning cylinder and the outer positioning folded edge. The outer positioning guide grooves are uniformly distributed and concave along the radial direction of the outer positioning plate, and a groove along the outer positioning guide groove is arranged in the middle position of two adjacent outer positioning guide grooves. The outer positioning push groove is radially arranged on the positioning disk, and a push block and a first return spring are embedded in the outer positioning push groove; a threaded through hole is penetrated between the side wall of each outer positioning push groove close to the outer side and the outer side wall of the outer positioning cylinder to connect the two sides, and a driving bolt is threadedly installed in the threaded through hole, and a first follower block and a second return spring are embedded in the outer positioning guide groove, and the first follower block extends out of the outer positioning guide groove at one end thereof, and the first follower block is fixedly connected to the outer side of the outer positioning guide groove with a first follower block pressure block extending at the front side of one end of the push block close to the axis; an adjustment gasket is fixed on the bottom surface of the outer positioning folded edge by a screw, and the adjustment gasket is on the outer side away from the axis. A vertical positioning pin is fixed on the side by screws; the inner positioning disk includes an inner positioning disk arranged in an annular shape and a coaxial inner positioning cylinder is fixedly connected to the bottom surface thereof, the inner diameter of the inner positioning cylinder is equal to the inner diameter of the inner positioning disk, and the inner walls of the inner positioning cylinder and the inner positioning disk are provided with concave positioning key grooves that penetrate axially; a plurality of concave inner positioning guide grooves are arranged in an annular pattern on the top surface of the inner positioning disk, and all the inner positioning guide grooves are arranged along the radial direction of the inner positioning disk, and the axis of the inner positioning guide groove and the axis of the outer positioning guide groove are on the same radial straight line; a third return spring close to one side of the center of the inner positioning disk and a third return spring away from the center of the inner positioning disk are embedded in each inner positioning guide groove. A second follower block on one side of the center, the second follower block is provided with a second follower pressure block which is parallel to the first follower pressure block and is on the same radius straight line; a circular cover plate is fixedly connected to the top surface of the inner positioning disc by screws; the top surface of the outer positioning fold is fixedly connected to the cover plate by screws; a plurality of cover plate through holes are evenly distributed in an annular manner on the same circumference of the cover plate; the back-rest tooling includes a back-rest disc arranged in a disc shape and a coaxial back-rest positioning shaft is fixedly connected at the axis center of the bottom surface thereof, and the back-rest positioning shaft is inserted into the inner side of the inner positioning cylinder; a back-rest positioning key protruding outward is fixedly connected to the outer wall of the back-rest positioning shaft, and the back-rest positioning key is parallel to the axis of the back-rest positioning shaft, so that the back-rest positioning key can be embedded in the positioning key slot;A plurality of downwardly protruding counter-pressing blocks are evenly arranged on the same circumference of the bottom surface of the counter-pressing disk, and the counter-pressing blocks are arranged along the radial direction of the counter-pressing disk; the number of the counter-pressing blocks is equal to and corresponds to the number of the through holes of the cover plate, and the counter-pressing blocks press the copper wires at the welding ends of the copper wires through the through holes of the cover plate, so that the welding end surfaces of all the copper wires are located in the same plane. ;

[0009] Preferably, the X-pin stator includes a cylindrical stator core, a plurality of inwardly concave and axially penetrating stator core slots are evenly arranged on the inner wall of the stator core, a plurality of hairpin-shaped flat copper wires are installed penetrating the stator core slots, six layers of flat copper wires are evenly arranged inside each stator core slot along the radial direction of the stator core, one end of the copper wire is bent as the stator crown end, and the other end is the stator welding end; a positioning groove is arranged on the outer wall of the stator core; the number of the cover plate through holes is equal to the number of the stator core slots and corresponds one to one.

[0010] Preferably, the positioning seat includes a horizontal, disc-shaped positioning seat bottom plate and a bottom plate through hole is arranged at its axis center, and a coaxial and concave annular bottom plate groove is arranged on the top surface of the positioning seat bottom plate at the outer part of the bottom plate through hole, and a cylindrical and coaxial positioning seat retaining ring is welded and fixed on the top surface of the positioning seat bottom plate outside the bottom plate groove, the inner diameter of the positioning seat retaining ring is smaller than the outer diameter of the stator core, and a concave and coaxial annular retaining ring step groove is arranged at the top of the positioning seat retaining ring near the inner side wall, and the distance between the bottom plane of the retaining ring step groove and the bottom plane of the bottom plate groove is greater than the height of the stator crown end exposed from the stator core.

[0011] Preferably, a plurality of concave retaining ring lower grooves of the same specifications are evenly arranged on the side wall of the positioning seat retaining ring, and a concave retaining ring upper groove is arranged in the middle position of two adjacent retaining ring lower grooves, and the specifications of all retaining ring upper grooves are the same.

[0012] Preferably, an arc-shaped inclined surface is provided between the retaining ring step groove and the top end of the outer side wall of the positioning seat retaining ring.

[0013] Preferably, a reset push block extending vertically downward is provided at the bottom of the push block, and a first reset spring is provided between the side of the reset push block close to the axis of the outer positioning disk and the side of the outer positioning push groove close to the axis of the outer positioning disk; a reset follower plate extending vertically downward is provided on the bottom surface of the first follower block, and a second reset spring is provided between the side of the reset follower plate close to the axis of the outer positioning disk and the side of the outer positioning guide groove close to the axis of the outer positioning disk.

[0014] Preferably, the upper surfaces of the push block, the first return spring, the first follower block and the second return spring are not higher than the upper surface of the outer positioning plate; the top ends of the third return spring and the second follower block are not higher than the top surface of the inner positioning plate.

[0015] Preferably, the adjustment gasket is provided with multiple types with different thicknesses; the positioning pin is fixed with the positioning groove by clamping, and after clamping and fixing, the axis of the outer positioning push groove and the axis of the stator core slot are on the same radius straight line.

[0016] The above-mentioned X-pin stator welding single-slot clamping device is used to clamp and fix the copper wire to be welded at the copper wire welding end of the X-pin stator, including the following steps:

[0017] Step 1: Place the X-pin stator to be welded on the positioning seat;

[0018] Step 2: Place the wire clamping tool on the X-pin stator, limit the placement height of the wire clamping tool by adjusting the gasket, and limit the angular phase of the wire clamping tool by the positioning pin;

[0019] Step 3: Place the back-rest tooling on the wire clamping tooling through a press and flatten the copper wire to ensure that the tops of all copper wires are in the same plane, and limit their angle phase through the back-rest positioning key;

[0020] Step 4: through the external bolt twisting device that cooperates with it, all the driving bolts are synchronously driven to rotate synchronously, so that the push block moves centripetally in a straight line, first contacts the two outermost layers of copper wires, and then continues to push the first follower block to move centripetally, so that the first follower block pressure block contacts the two middle layers of copper wires, and then pushes the second follower block to move centripetally, and finally pushes the two inner layers of copper wires, until the innermost layer of copper wires rests on the inner positioning plate and the movement ends;

[0021] Step 5, remove the counter-support tooling and start welding the copper wire with laser;

[0022] Step 6: After the laser welding is completed, the external cooperating device drives all the driving bolts to retract, the first reset spring drives the push block to reset, the second reset spring drives the first follower block to reset, and the third reset spring drives the second follower block to reset;

[0023] Step seven: The press drives the tooling back to its original position, removes the wire clamping tooling, and the robot grabs the X-pin stator to the tray. This completes the welding process.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The X-pin stator welding single-slot clamping device provided by the present invention has a single-slot single-drive design, and each slot can independently adjust the clamping force according to the actual state of the copper wire; the clamping force of each slot is accurately controlled to ensure the perfect fit between the welding device and the stator X-pin overlap end, thereby improving the consistency and reliability of welding;

[0026] By optimizing the clamping method, welding defects caused by insufficient fit, such as laser burns on copper wire paint film, are reduced, significantly improving the quality of solder joints.

[0027] The present invention can adapt to the size and shape differences of copper wires in different slots, provide a sufficiently large clamping force, and ensure that all copper wires can reach an ideal welding state during the welding process;

[0028] Synchronous control of all single-slot driven clamping modes simplifies the operation process, reduces production delays caused by improper adjustment, and improves overall production efficiency;

[0029] By improving welding quality, the scrap of materials due to poor welding is reduced, production costs are reduced, and material utilization is improved;

[0030] The single-slot single-drive design simplifies the maintenance and operation of the equipment, making the equipment more stable and reliable, and reducing production interruptions caused by equipment failures;

[0031] The present invention allows seamless connection with the automated production line, further improving the automation level of the production line and reducing manual intervention;

[0032] In summary, the single-slot single-drive welding device proposed in the present invention not only solves the key technical problems in the welding process of X-pin winding motors, but also brings significant economic and social benefits to motor manufacturers by improving welding quality and production efficiency. This innovative welding device is expected to become an important technological breakthrough in the field of new energy motor manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the general assembly of the present invention;

[0034] Figure 2 for Figure 1 Structural diagram;

[0035] Figure 3 for Figure 2 Sectional view;

[0036] Figure 4 for Figure 3 A magnified view of middle;

[0037] Figure 5 for Figure 3 Enlarged view of the middle drive bolt part;

[0038] Figure 6 This is the axonometric drawing of the clamping fixture;

[0039] Figure 7 This is a schematic diagram of copper wire clamping;

[0040] Figure 8 Schematic diagram of adjusting shims and locating pins;

[0041] Fig. 9 It is a schematic diagram of the first follower block and the second return spring;

[0042] Fig.10 It is the axonometric drawing of the counter-tooling;

[0043] In the figure: X-pin stator-1, stator core-11, stator core slot-12, flat copper wire-13, stator crown end-14, stator welding end-15, positioning slot-16, positioning seat-2, positioning seat bottom plate-21, bottom plate through hole-22, bottom plate groove-23, positioning seat retaining ring-24, retaining ring lower groove-25, retaining ring upper groove-26, retaining ring step groove-27, arc-shaped inclined surface-28, wire clamping tool-3, external positioning plate-31, external positioning cylinder-311, external positioning folding edge-312, external positioning guide groove-313, external positioning push groove-314, push block-315, first return spring -316, reset push block -317, drive bolt -318, first follower block -319, second reset spring -320, first follower block pressure block -321, adjustment gasket -322, positioning pin -323, inner positioning plate -33, inner positioning disc -331, inner positioning cylinder -332, positioning keyway -333, inner positioning guide groove -334, third reset spring -335, second follower block -336, second follower pressure block -337, cover plate -34, cover plate through hole -341, back-rest tooling -4, back-rest plate -41, back-rest positioning shaft -42, back-rest positioning key -43, back-rest pressure block -44. DETAILED DESCRIPTION

[0044] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings and specific embodiments.

[0045] Please refer to Figure 1-10 , Figure 1 It is a schematic diagram of the general assembly of the present invention; Figure 2 for Figure 1 Structural diagram; Figure 3 for Figure 2 Sectional view; Figure 4 for Figure 3 A magnified view of middle; Figure 5 for Figure 3 Enlarged view of the middle drive bolt part; Figure 6 This is the axonometric drawing of the clamping fixture; Figure 7 This is a schematic diagram of copper wire clamping; Figure 8 Schematic diagram of adjusting shims and locating pins; Fig. 9 It is a schematic diagram of the first follower block and the second return spring; Fig.10 This is the axonometric drawing of the reverse tooling.

[0046] The present invention provides an X-pin stator welding single-slot clamping device, comprising an X-pin stator 1, a positioning seat 2 for positioning the stator is arranged at the bottom, and a wire clamping tool 3 for clamping and fixing a copper wire is arranged at the top; a back-leaning tool 4 for assisting in pressing the copper wire is arranged on the top of the wire clamping tool 3.

[0047] The X-pin stator 1 includes a cylindrical stator core 11, a plurality of inwardly concave and axially penetrating stator core slots 12 are evenly arranged on the inner wall of the stator core 11, a plurality of hairpin-shaped flat copper wires 13 are installed penetrating in the stator core slots 12, and six layers of flat copper wires are evenly arranged in the radial direction of the stator core 11 inside each stator core slot 12; one end of the copper wire is bent as a stator crown end 14, and the other end of the copper wire that needs to be welded is a stator welding end 15, and the six layers of copper wires of the stator welding end 15 are clamped and fixed by the wire clamping tool 3 to facilitate welding; a positioning groove 16 is arranged on the outer wall of the stator core 11.

[0048] The positioning seat 2 includes a horizontal disc-shaped positioning seat bottom plate 21 and a bottom plate through hole 22 is arranged at its axis, and a coaxial and concave annular bottom plate groove 23 is arranged on the top surface of the positioning seat bottom plate 21 at the outer part of the bottom plate through hole 22, and a cylindrical and coaxial positioning seat retaining ring 24 is welded and fixed on the top surface of the positioning seat bottom plate 21 outside the bottom plate groove 23, and the inner diameter of the positioning seat retaining ring 24 is smaller than the outer diameter of the stator core 11, so that the stator core 11 can be placed on the positioning seat retaining ring 24; a plurality of concave retaining ring lower grooves 25 of the same specification are evenly arranged on the side wall of the positioning seat retaining ring 24, and a concave retaining ring upper groove 26 is arranged in the middle position of two adjacent retaining ring lower grooves 25. And the specifications of the grooves 26 on all the retaining rings are the same; a concave and coaxial annular retaining ring step groove 27 is provided at the top of the positioning seat retaining ring 24 near the inner wall, which is used to position and place the X-pin stator 1; the distance between the bottom plane of the retaining ring step groove 27 and the bottom plane of the bottom plate groove 23 is greater than the height of the stator crown end 14 exposed from the stator core 11, thereby ensuring that the X-pin stator 1 is positioned and placed on the positioning seat 2 without affecting the stator crown end 14; an arc-shaped inclined surface 28 is provided between the retaining ring step groove 27 and the top of the outer wall of the positioning seat retaining ring 24, so that the X-pin stator 1 can be placed smoothly and accurately on the retaining ring step groove 27 during the placement process.

[0049] The clamping tool 3 comprises a coaxial outer positioning plate 31 and an inner positioning plate 33, the top surfaces of which are connected as a whole via a cover plate 34; and a backing tool 4 is positioned on the top of the clamping tool.

[0050] The outer positioning disk 31 comprises a cylindrical outer positioning cylinder 311, the top of the outer positioning cylinder 311 is provided with an outer positioning fold 312 radially extending toward its axis, and an annular uniformly distributed and concave outer positioning guide groove 313 is commonly provided on the top surface of the outer positioning cylinder 311 and the outer positioning fold 312, and the outer positioning guide groove 313 is arranged along the radial direction of the outer positioning disk 31, and an outer positioning guide groove 313 arranged along the radial direction of the outer positioning disk 31 is arranged in the middle position of two adjacent outer positioning guide grooves 313. The outer positioning push groove 314 is provided with a push block 315 and a first return spring 316 embedded in the outer positioning push groove 314. The bottom of the push block 315 is provided with a return push block 317 extending vertically downward. The first return spring 316 is provided between the side of the return push block 317 close to the axis of the outer positioning disk 31 and the side of the outer positioning push groove 314 close to the axis of the outer positioning disk 31. On the outer side wall of the outer positioning cylinder 311, a spring 316 is provided at a position corresponding to each outer positioning push groove 314. The outer positioning guide groove 313 is provided with a first follower block 319 and a second return spring 320, and a return follower plate extending vertically downward is provided on the bottom surface of the first follower block 319, and a return follower plate extending vertically downward is provided on the side of the return follower plate close to the axis of the outer positioning disk 31 and close to the outer positioning guide groove 313. A second return spring 320 is arranged between the side surfaces of the axis of the outer positioning disk 31, the first follower block 319 extends out of the outer positioning guide groove 313 at one end extending toward the axis, and the first follower block 319 is fixedly connected to the outer side of the outer positioning guide groove 313 with a first follower block pressure block 321 extending to the front side of the pushing block 315 near one end of the axis; the upper surfaces of the pushing block 315, the first return spring 316, the first follower block 319 and the second return spring 320 are not higher than the upper surface of the outer positioning disk 31.

[0051] An adjusting gasket 322 is fixed to the bottom surface of the outer positioning fold 312 by screws, and a vertical positioning pin 323 is fixed to the outer side of the adjusting gasket 322 away from the axis by screws. The positioning pin 323 is clamped and fixed to the positioning groove 16. After clamping and fixing, the axis of the outer positioning push groove 314 and the axis of the stator core slot 12 are on the same radius straight line.

[0052] The adjusting gasket 322 is provided with a plurality of different thicknesses, and the adjusting gasket 322 of corresponding thickness can be selected according to actual use requirements.

[0053] The inner positioning disk 33 comprises an inner positioning disk 331 arranged in an annular shape, a coaxial inner positioning cylinder 332 is fixedly connected to the bottom surface of the inner positioning disk 331, the inner diameter of the inner positioning cylinder 332 is equal to the inner diameter of the inner positioning disk 331, and the inner walls of the inner positioning cylinder 332 and the inner positioning disk 331 are provided with concave and axially penetrating positioning key grooves 333; a plurality of concave inner positioning guide grooves 334 are arranged in an annular manner on the top surface of the inner positioning disk 331, and all the inner positioning guide grooves 334 are arranged along the radial direction of the inner positioning disk 33 and the number thereof is equal to the number of the stator core slots 12, and the inner positioning guide grooves 334 are arranged in an annular manner. The axis of the groove 334 is on the same radial straight line as the axis of the outer positioning guide groove 313; a third return spring 335 close to the center of the inner positioning disk 33 and a second follower block 336 away from the center of the inner positioning disk 33 are embedded in each inner positioning guide groove 334, and the movement of the third return spring 335 and the second follower block 336 is guided; the second follower block 336 is provided with a second follower pressure block 337 which is parallel to the first follower pressure block 321 and is on the same radial straight line; the top ends of the third return spring 335 and the second follower block 336 are not higher than the top surface of the inner positioning disk 33.

[0054] A circular cover plate 34 is screwed onto the top surface of the inner positioning disc 331; the top surface of the outer positioning folded edge 312 is screwed to the cover plate 34; a plurality of cover plate through holes 341 are evenly distributed in an annular pattern on the same circumference of the cover plate 34, the number of the cover plate through holes 341 is equal to and corresponds to the number of the stator core slots 12, and the top ends of all the welding copper wires can be exposed through the cover plate through holes 341.

[0055] The back-rest tooling 4 comprises a back-rest plate 41 in a disc shape, a coaxial back-rest positioning shaft 42 is fixedly connected at the axis center of the bottom surface of the back-rest plate 41, and the back-rest positioning shaft 42 is inserted into the inner side of the inner positioning cylinder 332; a back-rest positioning key 43 protruding outward is fixedly connected to the outer wall of the back-rest positioning shaft 42, and the back-rest positioning key 43 is parallel to the axis of the back-rest positioning shaft 42, so that the back-rest positioning key 43 can be embedded in the positioning key slot 333; A plurality of downwardly protruding counter-pressure blocks 44 are evenly arranged on the same circumference of the bottom surface of the disk 41, and all the counter-pressure blocks 44 are arranged along the radial direction of the counter-pressure disk 41, and the center angles of two adjacent counter-pressure blocks 44 are equal; the number of the counter-pressure blocks 44 is equal to the number of the stator core slots 12 and corresponds one to one, and the counter-pressure blocks 44 press the copper wires at the welding ends of the copper wires through the cover plate through holes 341, so that the welding end faces of all the copper wires are located in the same plane.

[0056] When in use, the steps for clamping and fixing the copper wire to be welded at the copper wire welding end of the X-pin stator 1 are as follows:

[0057] Step 1: Place the X-pin stator 1 to be welded on the positioning seat 2;

[0058] Step 2: Place the wire clamping tool 3 on the X-pin stator 1, limit the placement height of the wire clamping tool 3 by adjusting the gasket 322, and limit the angular phase of the wire clamping tool 3 by the positioning pin 323;

[0059] Step 3: Place the back-rest tooling 4 on the wire clamping tooling 3 and flatten the copper wires by a press machine to ensure that the tops of all the copper wires are in the same plane, and limit their angle phase by the back-rest positioning key 43;

[0060] Step 4: through the external bolt twisting device that cooperates with it, all the driving bolts 318 are synchronously driven to rotate synchronously, so that the push block 315 moves centripetally in a straight line, first contacts the two outermost layers of copper wires, and then continues to push the first follower block 319 to move centripetally, so that the first follower block pressure block 321 contacts the two middle layers of copper wires, and then pushes the second follower block 336 to move centripetally, and finally pushes the two inner layers of copper wires, until the innermost layer of copper wires rests on the inner positioning plate 33 and the movement ends;

[0061] Step 5, remove the counter-supporting tool 4 and start welding the copper wire with laser;

[0062] Step 6: After the laser welding is completed, the external cooperating device drives all the driving bolts 318 to retract, the first return spring 316 drives the push block 315 to return, the second return spring 320 drives the first follower block 319 to return, and the third return spring 335 drives the second follower block 336 to return;

[0063] Step 7: The press drive is turned back to the tooling 4, the clamping tooling 3 is removed, and the robot grabs the X-pin stator 1 to the tray, and the welding process is completed.

[0064] The X-pin stator welding single-slot clamping device provided by the present invention has a single-slot single-drive design, and each slot can independently adjust the clamping force according to the actual state of the copper wire; the clamping force of each slot is accurately controlled to ensure the perfect fit between the welding device and the stator X-pin overlap end, thereby improving the consistency and reliability of welding; by optimizing the clamping method, welding defects caused by insufficient fit, such as laser burns to the copper wire paint film and other problems are reduced, and the quality of the solder joint is significantly improved; the present invention can adapt to the size and shape differences of copper wires in different slots, provide a sufficiently large clamping force, and ensure that all copper wires can reach an ideal welding state during the welding process; the clamping methods of all single-slot drives are synchronously controlled, which simplifies the operation process, reduces production delays caused by improper adjustment, and improves the overall production efficiency; by improving the welding quality, the scrap of materials caused by poor welding is reduced, the production cost is reduced, and the material utilization rate is improved; the design of the single-slot single-drive simplifies the maintenance and operation of the equipment, makes the equipment more stable and reliable, and reduces production interruptions caused by equipment failures; the present invention allows seamless connection with the automated production line, further improves the automation level of the production line, and reduces manual intervention.

[0065] In summary, the single-slot single-drive welding device proposed in the present invention not only solves the key technical problems in the welding process of X-pin winding motors, but also brings significant economic and social benefits to motor manufacturers by improving welding quality and production efficiency. This innovative welding device is expected to become an important technological breakthrough in the field of new energy motor manufacturing.

[0066] Although the embodiments of the present invention have been shown and described, it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, it can be understood by ordinary technicians in this field that without departing from the principle and spirit of the present invention, without making creative work, all other embodiments obtained by making various changes, modifications, substitutions and variations to these embodiments belong to the scope of protection of the present invention; in addition, the various different embodiments of the present invention can also be combined arbitrarily, as long as they do not violate the idea of ​​the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A single-slot clamping device for X-pin stator welding, Features: The invention comprises an X-pin stator (1) and a positioning seat (2) is arranged at the bottom thereof, a wire clamping tool (3) is arranged at the top thereof, and a back-rest tool (4) is arranged at the top of the wire clamping tool (3); the wire clamping tool (3) comprises a coaxial outer positioning disk (31) and an inner positioning disk (33), and the top surfaces of the two positioning disks are connected into one body through a cover plate (34); the outer positioning disk (31) comprises a cylindrical outer positioning cylinder (311) and a radial outer positioning fold (312) is arranged at the top thereof to extend radially toward the axis thereof, and an annular uniformly distributed and concave groove along the outer positioning disk (311) is arranged on the top surfaces of the outer positioning cylinder (311) and the outer positioning fold (312). 1) radially arranged outer positioning guide grooves (313), wherein an outer positioning push groove (314) radially arranged along the outer positioning plate (31) is arranged at the middle position of two adjacent outer positioning guide grooves (313), and a push block (315) and a first return spring (316) are embedded in the outer positioning push groove (314); a threaded through hole is penetrated between the side wall close to the outer side of each outer positioning push groove (314) and the outer side wall of the outer positioning cylinder (311) to connect the two sides, and a driving bolt (318) is threadedly installed in the threaded through hole, and a first follower block (315) is embedded in the outer positioning guide groove (313) 319 and a second return spring (320), the first follower block (319) extends out of the outer positioning guide groove (313) at one end thereof extending toward the axis, and the first follower block (319) is fixedly connected to a first follower block pressing block (321) extending to the front side of one end of the push block (315) close to the axis on the outer side of the outer positioning guide groove (313); an adjustment washer (322) is fixed on the bottom surface of the outer positioning fold (312) by screws, and a vertical positioning pin (323) is fixed on the outer side of the adjustment washer (322) away from the axis by screws; the inner positioning disk (33) includes an inner positioning disk (331) arranged in an annular shape and A coaxial inner positioning cylinder (332) is fixedly connected to its bottom surface, the inner diameter of the inner positioning cylinder (332) is equal to the inner diameter of the inner positioning disc (331), and inner walls of the inner positioning cylinder (332) and the inner positioning disc (331) are provided with concave positioning key grooves (333) that penetrate axially; a plurality of concave inner positioning guide grooves (334) are arranged in an annular pattern on the top surface of the inner positioning disc (331), and all the inner positioning guide grooves (334) are arranged along the radial direction of the inner positioning disc (33), and the axis of the inner positioning guide groove (334) is on the same radial straight line as the axis of the outer positioning guide groove (313);A third return spring (335) close to the center of the inner positioning disk (33) and a second follower block (336) away from the center of the inner positioning disk (33) are embedded in each inner positioning guide groove (334); the second follower block (336) is provided with a second follower pressure block (337) parallel to the first follower pressure block (321) and on the same radial straight line; a circular cover plate (34) is fixedly screwed to the top surface of the inner positioning disk (331); the top surface of the outer positioning fold (312) is fixedly screwed to the cover plate (34); a plurality of cover plate through holes (341) are evenly distributed in an annular pattern on the same circumference on the cover plate (34); the back-rest tooling (4) includes a back-rest disk (41) in a disc shape and a coaxial back-rest positioning shaft (42) is fixedly screwed at the axis center of the bottom surface thereof, The back-rest positioning shaft (42) is inserted into the inner side of the inner positioning cylinder (332); a back-rest positioning key (43) protruding outward is fixedly connected to the outer wall of the back-rest positioning shaft (42), and the back-rest positioning key (43) is parallel to the axis of the back-rest positioning shaft (42), so that the back-rest positioning key (43) can be embedded in the positioning key slot (333); a plurality of back-rest pressure blocks (44) protruding downward are evenly arranged on the same circumference of the bottom surface of the back-rest disk (41), and the back-rest pressure blocks (44) are arranged along the radial direction of the back-rest disk (41); the number of the back-rest pressure blocks (44) is equal to the number of the cover plate through holes (341) and corresponds to each other, and the back-rest pressure blocks (44) press the copper wires at the welding ends of the copper wires through the cover plate through holes (341), so that the welding end surfaces of all the copper wires are located in the same plane. ; 2. The X-pin stator welding single slot clamping device according to claim 1, Features: The X-pin stator (1) comprises a cylindrical stator core (11), the inner wall of the stator core (11) being evenly provided with a plurality of inwardly concave stator core slots (12) penetrating axially, a plurality of hairpin-shaped flat copper wires (13) penetrating the stator core slots (12), six layers of flat copper wires being evenly arranged in the radial direction of the stator core (11) inside each stator core slot (12), one end of the copper wire being bent being a stator crown end (14) and the other end being a stator welding end (15); a positioning slot (16) being provided on the outer wall of the stator core (11); and the number of the cover plate through holes (341) being equal to and corresponding to the number of the stator core slots (12).

3. The X-pin stator welding single slot clamping device according to claim 2, Features: The positioning seat (2) comprises a horizontal disc-shaped positioning seat bottom plate (21) and a bottom plate through hole (22) is arranged at the axis thereof, and a coaxial and concave annular bottom plate groove (23) is arranged on the top surface of the positioning seat bottom plate (21) at the outer portion of the bottom plate through hole (22), and a cylindrical and coaxial positioning seat retaining ring (24) is welded and fixed on the top surface of the positioning seat bottom plate (21) outside the bottom plate groove (23), the inner diameter of the positioning seat retaining ring (24) is smaller than the outer diameter of the stator core (11), and a concave and coaxial annular retaining ring step groove (27) is arranged at the top end of the positioning seat retaining ring (24) near the inner side wall, and the distance between the bottom plane of the retaining ring step groove (27) and the bottom plane of the bottom plate groove (23) is greater than the height of the stator crown end (14) exposed from the stator core (11).

4. The X-pin stator welding single slot clamping device according to claim 3, Features: A plurality of concave retaining ring lower grooves (25) of the same specification are evenly arranged on the side wall of the positioning seat retaining ring (24), and a concave retaining ring upper groove (26) is arranged in the middle of two adjacent retaining ring lower grooves (25), and the specifications of all retaining ring upper grooves (26) are the same.

5. The X-pin stator welding single slot clamping device according to claim 4, Features: An arc-shaped inclined surface (28) is provided between the retaining ring step groove (27) and the top end of the outer side wall of the positioning seat retaining ring (24).

6. The X-pin stator welding single slot clamping device according to claim 5, Features: A reset push block (317) extending vertically downward is provided at the bottom of the push block (315), and a first reset spring (316) is provided between a side surface of the reset push block (317) close to the axis of the outer positioning disk (31) and a side surface of the outer positioning push groove (314) close to the axis of the outer positioning disk (31). A reset follower plate extending vertically downward is provided on the bottom surface of the first follower block (319), and a second reset spring (320) is provided between a side surface of the reset follower plate close to the axis of the outer positioning disk (31) and a side surface of the outer positioning guide groove (313) close to the axis of the outer positioning disk (31).

7. The X-pin stator welding single slot clamping device according to claim 6, Features: The upper surfaces of the pushing block (315), the first return spring (316), the first follower block (319), and the second return spring (320) are not higher than the upper surface of the outer positioning disk (31); and the top ends of the third return spring (335) and the second follower block (336) are not higher than the top surface of the inner positioning disk (33).

8. The X-pin stator welding single slot clamping device according to claim 7, Features: The adjustment gasket (322) is provided with multiple types of different thicknesses; the positioning pin (323) is fixed to the positioning groove (16) by clamping, and after clamping and fixing, the axis of the outer positioning push groove (314) and the axis of the stator core slot (12) are on the same radius straight line.

9. A method for clamping and fixing the copper wire to be welded at the copper wire welding end of an X-pin stator (1) by using the X-pin stator welding single-slot clamping device according to claim 8, Features: The following steps are involved: Step 1: placing the X-pin stator (1) to be welded on the positioning seat (2); Step 2: placing the wire clamping tool (3) on the X-pin stator (1), limiting the placement height of the wire clamping tool (3) by adjusting the gasket (322), and limiting the angular phase of the wire clamping tool (3) by the positioning pin (323); Step 3, placing the back-rest tooling (4) on the wire clamping tooling (3) by a press and flattening the copper wires to ensure that the top ends of all the copper wires are in the same plane, and limiting their angle phase by the back-rest positioning key (43); Step 4, through the external bolt twisting device that cooperates with it, all the driving bolts (318) are synchronously driven to rotate synchronously, so that the push block (315) moves centripetally in a straight line, first contacts the two outermost layers of copper wire, and then continues to push the first follower block (319) to move centripetally, so that the first follower block pressure block (321) contacts the two middle layers of copper wire, and then pushes the second follower block (336) to move centripetally, and finally pushes the two inner layers of copper wire, until the innermost layer of copper wire rests on the inner positioning plate (33) and the movement ends; Step 5, remove the counter-supporting tool (4) and start welding the copper wire using laser; Step 6: After the laser welding is completed, the external cooperating device drives all the driving bolts (318) to retract, the first return spring (316) drives the push block (315) to return, the second return spring (320) drives the first follower block (319) to return, and the third return spring (335) drives the second follower block (336) to return; Step 7: The press machine drives the back-up tooling (4) back to its original position, removes the wire clamping tooling (3), and the robot grabs the X-pin stator (1) to the tray, thus completing the welding process.

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