Anti-deformation welding tool for motor rotor core shaft

Abstract

The present application belongs to the technical field of motor rotor processing tooling, in particular to a kind of anti-deformation welding tooling of motor rotor core shaft, including work rack, support table, positioning assembly, anti-deformation assembly and welding assembly.Positioning assembly is driven by driving portion to drive both sides positioning rod to be centered and positioned in the middle part of support table from both ends;Anti-deformation assembly is followed after positioning to clamp core shaft to middle section shaft part, and cooling liquid is passed in through liquid cooling hose embedded in clamping block, forming axial thermal resistance barrier, blocking welding heat conduction along the axial to both ends, from the source to inhibit welding deformation.Welding assembly drives clamping part and core shaft to rotate around axis after clamping is completed, and synchronous welding is carried out by cooperating with double-sided welding gun, and double-sided weld is formed at one time, and heat input is symmetrical and uniform.The present application integrates positioning, forced cooling clamping, rotation and double-sided welding in single sequential action process, realizes high-precision anti-deformation control and high-efficiency automatic operation of core shaft welding.

Description

Technical Field

[0001] This invention belongs to the field of motor rotor machining tooling technology, and in particular relates to a deformation-resistant welding tooling for motor rotor core shaft. Background Technology

[0002] The rotor core shaft of an electric motor is typically formed by welding the middle section of the core laminations to the two end shafts. The welding quality directly affects the rotor's operating accuracy and service life. During the assembly and welding process of the core and shaft, the high temperature during welding can cause localized thermal stress in the core shaft, which can easily lead to shaft bending and deformation. Furthermore, the localized deformation can spread and amplify along the shaft axis towards both ends, resulting in a decrease in the overall accuracy of the core shaft.

[0003] Existing processes typically involve pre-positioning the iron core shaft before welding, using simple V-blocks or clamps for holding, and then welding one side at a time. This method involves independent positioning and clamping actions, requiring manual operation or separate power sources, resulting in cumbersome operation, poor repeatability, and difficulty in ensuring the consistency of the axial direction at both ends of the iron core shaft. Secondly, the clamping devices are mostly simple mechanical contacts without forced cooling, failing to effectively block the axial conduction of welding heat, leading to significant post-weld deformation and often requiring additional straightening processes. Furthermore, the workpiece must be fixed or manually rotated during welding, preventing simultaneous welding of both sides; asymmetrical heat input on both sides further exacerbates deformation, and production efficiency is low. Therefore, we propose a deformation-resistant welding fixture for motor rotor iron core shafts to address these problems. Summary of the Invention

[0004] The purpose of this invention is to address the above-mentioned problems by providing a welding fixture for preventing deformation of the motor rotor core shaft.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a welding fixture for preventing deformation of a motor rotor core shaft, comprising:

[0006] The machine frame and the support platform are fixedly connected to the machine frame;

[0007] A positioning assembly, comprising a driving part and a positioning part, wherein the driving part is connected to two sets of positioning parts, and each positioning part includes positioning rods respectively disposed on both sides of the support platform, the two sets of positioning rods being used to position the iron core shaft at the middle of the support platform from both ends;

[0008] The anti-deformation component is provided in two sets, which are respectively located on both sides of the support platform. The anti-deformation component is in transmission cooperation with the positioning part. After the positioning part positions the iron core shaft, the anti-deformation component is used to clamp the iron core shaft radially from both sides simultaneously, and to introduce coolant into the clamping point to cool it down, so as to block the welding deformation from being transmitted to both ends along the axial direction of the iron core shaft and avoid the deformation from spreading and amplifying.

[0009] The welding assembly includes a welding part and a rotating part. The rotating part is connected to the anti-deformation assembly for driving the clamping part in the anti-deformation assembly to rotate, thereby driving the iron core shaft to rotate around its axis. The welding part is provided with two sets of welding heads, which are used to weld both sides of the iron core shaft simultaneously during the rotation of the iron core shaft.

[0010] In the aforementioned anti-deformation welding fixture for a motor rotor core shaft, the drive unit includes a motor frame, a drive motor, a drive crossbar, a drive gear, a drive rack, and drive slots. The motor frame is fixedly connected to the work frame, the drive motor is fixedly connected to the top surface of the motor frame, and the drive crossbar is rotatably connected to the work frame. One end of the drive crossbar is fixedly connected to the output shaft of the drive motor, and the other end of the drive crossbar passes through the work frame and is fixedly connected to the drive gear. Two sets of drive slots are provided on the work frame, and drive racks are slidably connected to the drive slots. The two sets of drive racks are located on the upper and lower sides of the drive gear, respectively, and both sets of drive racks mesh with the drive gear.

[0011] In the aforementioned anti-deformation welding fixture for a motor rotor core shaft, the positioning part includes a positioning frame, a positioning block, a positioning bracket, a positioning rod, and an abutting turntable. The positioning frame is fixedly connected to the end of the drive rack, the positioning block is elastically slidably connected inside the positioning frame, the positioning bracket is fixedly connected to the side of the positioning block, the positioning bracket is elastically slidably connected to the positioning rod, and the end of the positioning rod near the core shaft is rotatably connected to the abutting turntable.

[0012] In the aforementioned anti-deformation welding fixture for a motor rotor core shaft, the anti-deformation component includes a mounting plate, a connecting plate, a connecting cylinder, a clamping ring, a first transmission ring, a first transmission rod, and a second transmission ring. The mounting plate is fixedly connected to the work frame, and the connecting plate is elastically slidably connected to the mounting plate. The connecting cylinder is rotatably connected to the inner circumferential wall of the connecting plate, and the clamping ring is fixedly connected to one end of the connecting cylinder near the support platform. The first transmission rod is slidably connected to the inner limit of the connecting plate, and one end of the first transmission rod passes through the connecting plate and is fixedly connected to the first transmission ring. The first transmission ring is located at the end of the connecting cylinder away from the support platform, and the inner circumferential wall of the first transmission ring is spaced apart from the outer circumferential wall of the connecting cylinder. The second transmission ring is disposed between the connecting plate and the clamping ring, and the second transmission ring is elastically connected to the clamping ring. The other end of the first transmission rod passes through the connecting plate and abuts against the second transmission ring.

[0013] In the aforementioned anti-deformation welding fixture for a motor rotor core shaft, the anti-deformation component further includes a second transmission rod, a clamping through groove, a transmission groove, a clamping block, and a liquid cooling hose. The second transmission ring is fixedly connected to several sets of second transmission rods arranged circumferentially. Several sets of clamping through grooves are provided on the clamping ring. Several sets of clamping blocks are elastically slidably connected to the side of the clamping ring near the support platform. The clamping block is provided with a transmission groove. The side wall of the transmission groove opposite to the second transmission rod is inclined. The positions of the second transmission rod, the clamping through groove, and the transmission groove correspond to each other. A liquid cooling hose is embedded in the clamping block.

[0014] In the aforementioned anti-deformation welding fixture for a motor rotor core shaft, the positioning rod and the connecting cylinder are coaxially spaced apart, and the positioning rod passes through the connecting cylinder.

[0015] In the aforementioned anti-deformation welding fixture for a motor rotor core shaft, the rotating part includes a transmission vertical rod, a transmission rack, a first transmission shaft, a transmission gear, a first bevel gear, a mounting base, a second transmission shaft, a second bevel gear, a sector gear, and a gear ring. The transmission vertical rod is fixedly connected to the bottom surface of the drive rack, and the lower end of the transmission vertical rod is fixedly connected to the transmission rack. The first transmission shaft is rotatably connected to the working frame, and the first transmission shaft is fixedly connected to the transmission gear and the first bevel gear. The transmission gear meshes with the transmission rack. The mounting base is fixedly connected to the working frame. The second transmission shaft is rotatably connected to the mounting base, and the second transmission shaft is fixedly connected to the second bevel gear and the sector gear. The first bevel gear meshes with the second bevel gear. The gear ring is fixedly connected to the outer peripheral wall of the connecting cylinder at the end away from the support platform, and the sector gear meshes with the gear ring.

[0016] In the aforementioned anti-deformation welding fixture for a motor rotor core shaft, the welding part includes a sliding cylinder, a welding table, and welding guns. The welding table is slidably connected to the work frame, the sliding cylinder is fixedly connected to the work frame, the front end of the piston rod of the sliding cylinder is fixedly connected to the welding table, and two sets of welding guns are fixedly connected to the top surface of the welding table. The two sets of welding guns are located on both sides of the core shaft.

[0017] Compared with existing technologies, the advantages of a deformation-resistant welding fixture for a motor rotor core shaft are:

[0018] 1. By setting up anti-deformation components, rigid clamping is achieved, which forcibly constrains the workpiece and resists welding thermal stress, thereby effectively suppressing bending deformation, ensuring straightness after welding, and ensuring that the clamping block and the shaft section fit tightly, improving the heat transfer efficiency of the coolant. The clamping block is embedded with a liquid cooling hose, which introduces coolant while clamping, forcibly cooling the clamped part of the iron core shaft, forming an axial thermal barrier, effectively blocking the conduction of welding heat along the axial direction to both ends, and suppressing the diffusion and amplification of welding deformation from the source.

[0019] 2. By synchronously driving the positioning units on both sides and the anti-deformation assembly with a single drive unit, the automatic centering and clamping of the iron core shaft is integrated. After the positioning rod pushes both ends of the iron core shaft to complete the centering, the positioning frame continues to push the anti-deformation assembly forward as a whole. Through the sequential pushing of the first transmission ring, transmission rod, and second transmission ring, the axial displacement is converted into the radial synchronous clamping force of the clamping block. The entire positioning and clamping process does not require an independent power source, has a compact structure, and significantly improves the working cycle and clamping reliability.

[0020] 3. After the anti-deformation component locks the iron core shaft, the excessive stroke of the drive rack drives the clamping part and the iron core shaft to rotate precisely around its axis through the linkage of the transmission rack, gear pair, and sector gear. Simultaneously, two sets of welding guns driven by sliding cylinders feed synchronously, welding the weld seams on both sides during one rotation of the iron core shaft. The heat input on both sides is symmetrical and uniform, and the weld seam is formed in one step. The entire process of positioning, clamping and cooling, rotation, and double-sided welding is completed sequentially by the forward stroke of the same drive motor. Reverse rotation resets the machine, resulting in a high degree of automation and ensuring welding efficiency and quality consistency. It is particularly suitable for the mass production of motor rotor iron core shafts. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the drive motor in this invention;

[0023] Figure 3 This is a schematic diagram of the positioning component in this invention;

[0024] Figure 4 yes Figure 3 Enlarged view of part A;

[0025] Figure 5 This is a schematic diagram of the anti-deformation component in this invention;

[0026] Figure 6 This is an exploded view of the first transmission ring and the second transmission ring in this invention;

[0027] Figure 7 This is a schematic diagram of the connecting cylinder in this invention;

[0028] Figure 8 This is a schematic diagram of the rotating part in the present invention during transmission;

[0029] Figure 9 yes Figure 8 Enlarged view of part B;

[0030] Figure 10 This is a schematic diagram of the welded part in this invention.

[0031] In the diagram: 1. Working frame; 2. Support platform; 3. Positioning assembly; 301. Motor frame; 302. Drive motor; 303. Drive crossbar; 304. Drive gear; 305. Drive rack; 306. Drive groove; 307. Positioning frame; 308. Positioning block; 309. Positioning bracket; 310. Positioning rod; 311. Abutting turntable; 4. Anti-deformation assembly; 401. Mounting plate; 402. Connecting plate; 403. Connecting cylinder; 404. Clamping ring; 405. First transmission ring; 406. First transmission rod; 40 7. Second transmission ring; 408. Second transmission rod; 409. Clamping through groove; 410. Transmission groove; 411. Clamping block; 412. Liquid cooling hose; 5. Welding assembly; 501. Transmission vertical rod; 502. Transmission rack; 503. First transmission shaft; 504. Transmission gear; 505. First bevel gear; 506. Mounting base; 507. Second transmission shaft; 508. Second bevel gear; 509. Sector gear; 510. Gear ring; 511. Sliding cylinder; 512. Welding table; 513. Welding gun. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0033] like Figures 1-10 As shown, a welding fixture for preventing deformation of an electric motor rotor core shaft includes:

[0034] The machine frame 1 and the support platform 2 are fixedly connected to the machine frame 1;

[0035] The positioning component 3 includes a driving part and a positioning part. The driving part is connected to two sets of positioning parts. The positioning part includes positioning rods 310 respectively disposed on both sides of the support platform 2. The two sets of positioning rods 310 are used to position the iron core shaft in the middle of the support platform 2 from both ends.

[0036] Anti-deformation component 4, the anti-deformation component 4 is provided in two sets, the two sets of anti-deformation component 4 are respectively provided on both sides of the support platform 2. The anti-deformation component 4 is in transmission cooperation with the positioning part. The anti-deformation component 4 is used to clamp the iron core shaft radially from both sides after the positioning part positions the iron core shaft, and to introduce coolant into the clamping part to cool it down, so as to block the welding deformation from being transmitted to both ends along the axial direction of the iron core shaft and avoid deformation diffusion and amplification.

[0037] The welding assembly 5 includes a welding part and a rotating part. The rotating part is connected to the anti-deformation assembly 4 and is used to drive the clamping part in the anti-deformation assembly 4 to rotate, so as to drive the iron core shaft to rotate around its axis. The welding part is provided with two sets of welding heads, which are used to weld both sides of the iron core shaft at the same time during the rotation of the iron core shaft.

[0038] Before operation, the operator places the iron core shaft to be processed in the center of the support platform 2, starts the drive motor 302, and drives the drive gear 304 to move the two sets of drive racks 305 synchronously in opposite directions. This causes the abutment turntables 311 at the ends of the positioning rods 310 on both sides to press against the workpiece from both ends of the iron core shaft, completing the centering and positioning of the iron core shaft. After positioning, the positioning frame 309 continues to push inward and pushes the first transmission ring 405, first driving the connecting plate 402, connecting cylinder 403 and clamping ring 404 to feed as a whole until the connecting plate 402 abuts against the mounting plate 401 and is fixed in place. The first transmission ring 405 continues to slide axially, causing the second transmission rod 408 to press the inclined transmission groove 410 of the clamping block 411, driving multiple sets of clamping blocks 411 to retract radially and rigidly clamp the middle section of the iron core shaft. The liquid cooling hose 412 embedded in the clamping block 411 continuously circulates liquid to cool down the iron core shaft, blocking the axial conduction of welding heat and preventing the deformation of the iron core shaft from spreading and amplifying. After the workpiece is clamped, the drive motor 302 continues to work, driving the gear ring 510 to rotate via transmission, thereby causing the drive iron core shaft to rotate along the shaft; the sliding cylinder 511 drives two sets of welding guns 513 to synchronously approach the iron core shaft on both sides for welding, cooperating with the rotation of the iron core shaft to complete uniform welding around the entire circumference. After welding is completed, the drive motor 302 reverses, all structures are linked to reset, the workpiece is released, a single welding process is completed, and it is ready for the next processing.

[0039] like Figures 1-4 As shown, the drive unit includes a motor frame 301, a drive motor 302, a drive crossbar 303, a drive gear 304, a drive rack 305, and a drive groove 306. The motor frame 301 is fixedly connected to the working frame 1, the drive motor 302 is fixedly connected to the top surface of the motor frame 301, and the drive crossbar 303 is rotatably connected to the working frame 1. One end of the drive crossbar 303 is fixedly connected to the output shaft of the drive motor 302, and the other end of the drive crossbar 303 passes through the working frame 1 and is fixedly connected to the drive gear 304. Two sets of drive grooves 306 are provided on the working frame 1, and the drive racks 305 are slidably connected to the drive grooves 306. The two sets of drive racks 305 are located on the upper and lower sides of the drive gear 304, respectively, and both sets of drive racks 305 mesh with the drive gear 304.

[0040] The positioning part includes a positioning frame 307, a positioning block 308, a positioning frame 309, a positioning rod 310, and an abutting turntable 311. The positioning frame 307 is fixedly connected to the end of the drive rack 305. The positioning block 308 is elastically slidably connected inside the positioning frame 307. The positioning frame 309 is fixedly connected to the side of the positioning block 308. The positioning rod 310 is elastically slidably connected to the positioning frame 309. The end of the positioning rod 310 near the iron core shaft is rotatably connected to the abutting turntable 311.

[0041] When this fixture is in operation, the worker first places the motor rotor core shaft to be welded stably on the support platform 2, completing the initial placement of the workpiece. The drive motor 302 is then started. The drive motor 302 drives the drive gear 304 to rotate via the drive crossbar 303. The drive gear 304 meshes and drives the upper and lower sets of drive racks 305 to move synchronously inward along the drive groove 306. The drive racks 305 drive the end positioning frames 307, positioning blocks 308, positioning brackets 309, and positioning rods 310 to move synchronously towards the center of the core shaft. This causes the abutment turntables 311 at the ends of the positioning rods 310 to gradually abut against the two end faces of the core shaft. Through synchronous pushing and limiting from both sides, the core shaft is precisely aligned and positioned in the center of the support platform 2, completing the precise workpiece positioning process.

[0042] like Figure 1 and Figures 5-7 As shown, the anti-deformation component 4 includes a mounting plate 401, a connecting plate 402, a connecting cylinder 403, a clamping ring 404, a first transmission ring 405, a first transmission rod 406, and a second transmission ring 407. The mounting plate 401 is fixedly connected to the working frame 1. The connecting plate 402 is elastically slidably connected to the mounting plate 401. The connecting cylinder 403 is rotatably connected to the inner peripheral wall of the connecting plate 402. A clamping ring 404 is fixedly connected to one end of the connecting cylinder 403 near the support platform 2. The first transmission ring 405 is slidably connected to the inner peripheral wall of the connecting plate 402. The transmission rod 406 has one end that passes through the connecting plate 402 and is fixedly connected to a first transmission ring 405. The first transmission ring 405 is located at the end of the connecting cylinder 403 away from the support platform 2. The inner circumferential wall of the first transmission ring 405 is spaced apart from the outer circumferential wall of the connecting cylinder 403. The second transmission ring 407 is disposed between the connecting plate 402 and the clamping ring 404. The second transmission ring 407 is elastically connected to the clamping ring 404. The other end of the first transmission rod 406 passes through the connecting plate 402 and abuts against the second transmission ring 407.

[0043] The anti-deformation component 4 also includes a second transmission rod 408, a clamping through groove 409, a transmission groove 410, a clamping block 411, and a liquid cooling hose 412. The second transmission ring 407 is fixedly connected to several sets of second transmission rods 408 arranged along the circumference. Several sets of clamping through grooves 409 arranged along the circumference are opened on the clamping ring 404. Several sets of clamping blocks 411 arranged along the circumference are elastically slidably connected to the side of the clamping ring 404 near the support platform 2. The clamping block 411 is provided with a transmission groove 410. The side wall of the transmission groove 410 opposite to the second transmission rod 408 is inclined. The positions of the second transmission rod 408, the clamping through groove 409, and the transmission groove 410 are corresponding. The liquid cooling hose 412 is embedded in the clamping block 411.

[0044] The positioning rod 310 is coaxially spaced with the connecting cylinder 403, and the positioning rod 310 passes through the connecting cylinder 403.

[0045] After positioning is completed, the drive rack 305 continues to drive the positioning frame 309 to move inward. The positioning frame 309 gradually abuts against and pushes the first transmission ring 405. In the initial stage, the thrust is transmitted to the connecting plate 402 and the connecting cylinder 403 through the first transmission rod 406 and the second transmission ring 407, driving the whole to move towards the iron core shaft until the connecting plate 402 and the mounting plate 401 abut against the limit. At this time, the connecting plate 402 and the connecting cylinder 403 can no longer move forward. The drive motor 302 continues to work, and the positioning frame 309 continues to push the first transmission ring 405 inward, causing the first transmission ring 405 to slide along the axial direction of the connecting cylinder 403. This drives the first transmission rod 406 to further push the second transmission ring 407. The second transmission ring 407 drives the circumferentially distributed second transmission rods 408 to pass through the clamping slot 409 and squeeze the inclined transmission slot 410 of the clamping block 411. Under the guidance of the inclined plane, multiple sets of clamping blocks 411 synchronously retract radially inward along the clamping ring 404, rigidly clamping the middle section of the iron core shaft, thus achieving anti-deformation clamping and fixing of the workpiece.

[0046] During the clamping operation, the liquid cooling hose 412 embedded in the clamping block 411 continuously supplies coolant to cool the clamping area of ​​the iron core shaft in real time, quickly remove the high temperature heat conducted by the welding area, block the diffusion and amplification of welding thermal stress and deformation along the iron core shaft axis to both ends, effectively prevent the iron core shaft from bending and deforming during welding, and ensure the straightness and coaxiality accuracy of the shaft.

[0047] like Figures 1-8 - Figure 10As shown, the rotating part includes a transmission vertical rod 501, a transmission rack 502, a first transmission shaft 503, a transmission gear 504, a first bevel gear 505, a mounting base 506, a second transmission shaft 507, a second bevel gear 508, a sector gear 509, and a gear ring 510. The transmission vertical rod 501 is fixedly connected to the bottom surface of the drive rack 305, and the lower end of the transmission vertical rod 501 is fixedly connected to the transmission rack 502. The first transmission shaft 503 is rotatably connected to the working frame 1, and a transmission gear is fixedly connected to the first transmission shaft 503. 504 and the first bevel gear 505, the transmission gear 504 meshes with the transmission rack 502, the mounting base 506 is fixedly connected to the working frame 1, the second transmission shaft 507 is rotatably connected to the mounting base 506, the second transmission shaft 507 is fixedly connected to the second bevel gear 508 and the sector gear 509, the first bevel gear 505 meshes with the second bevel gear 508, the gear ring 510 is fixedly connected to the outer peripheral wall of the connecting cylinder 403 away from the support platform 2, and the sector gear 509 meshes with the gear ring 510.

[0048] The welding section includes a sliding cylinder 511, a welding table 512, and a welding gun 513. The welding table 512 is slidably connected to the working frame 1, and the sliding cylinder 511 is fixedly connected to the working frame 1. The front end of the piston rod of the sliding cylinder 511 is fixedly connected to the welding table 512. Two sets of welding guns 513 are fixedly connected to the top surface of the welding table 512, and the two sets of welding guns 513 are located on both sides of the iron core shaft.

[0049] Once the iron core shaft is fully clamped and fixed, the connecting plate 402 and the clamping block 411 no longer move. At this time, the remaining pushing displacement of the drive rack 305 is absorbed and buffered by the elastic structure between the positioning frame 307 and the positioning block 308. Simultaneously, during the movement of the drive rack 305, the bottom transmission vertical rod 501 and the transmission rack 502 move synchronously. The transmission rack 502 meshes with the drive gear 504 and the first transmission shaft 503 to rotate. Through the meshing transmission of the first bevel gear 505 and the second bevel gear 508, the second transmission shaft 507 and the sector gear 509 are driven to rotate. At this time, the connecting cylinder 403 has moved to the working position with the clamping structure. The gear ring 510 and the sector gear 509 are precisely meshed. The rotation of the sector gear 509 drives the gear ring 510, the connecting cylinder 403, the clamping ring 404 and the clamping block 411 to rotate as a whole, thereby driving the clamped and fixed iron core shaft to rotate uniformly around its own axis.

[0050] While the iron core shaft rotates, the sliding cylinder 511 drives the welding table 512 to slide and feed, causing the two sets of welding guns 513 to move to the welding position. The two sets of welding guns 513, symmetrically arranged, simultaneously perform welding operations on both sides of the iron core shaft. Combined with the uniform rotation of the iron core shaft, this completes the circumferential, all-around uniform welding of the workpiece. After the iron core shaft has rotated one revolution and all welding processes are completed, the drive motor 302 reverses, and all transmission and elastic structures reset sequentially. The clamping block 411 releases the iron core shaft, and the positioning and welding structures return to their initial positions, completing a single welding operation and awaiting the next workpiece processing.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A welding fixture for preventing deformation of an electric motor rotor core shaft, characterized in that, include: The work frame (1) and the support platform (2) are fixedly connected to the work frame (1); The positioning component (3) includes a driving part and a positioning part. The driving part is connected to two sets of positioning parts. The positioning part includes positioning rods (310) respectively disposed on both sides of the support platform (2). The two sets of positioning rods (310) are used to position the iron core shaft in the middle of the support platform (2) from both ends. Anti-deformation component (4), the anti-deformation component (4) is provided in two sets, the two sets of anti-deformation components (4) are respectively provided on both sides of the support platform (2), the anti-deformation component (4) is driven and cooperated with the positioning part, the anti-deformation component (4) is used to clamp the iron core shaft radially from both sides after the positioning part positions the iron core shaft, and to introduce coolant into the clamping part to cool it down, so as to block the welding deformation from being transmitted to both ends along the iron core shaft axis and avoid deformation diffusion and amplification; The welding assembly (5) includes a welding part and a rotating part. The rotating part is connected to the anti-deformation assembly (4) for driving the clamping part in the anti-deformation assembly (4) to rotate, so as to drive the iron core shaft to rotate around its axis. The welding part is provided with two sets of welding heads, which are used to weld both sides of the iron core shaft at the same time during the rotation of the iron core shaft.

2. The anti-deformation welding fixture for the motor rotor core shaft according to claim 1, characterized in that, The drive unit includes a motor frame (301), a drive motor (302), a drive crossbar (303), a drive gear (304), a drive rack (305), and a drive slot (306). The motor frame (301) is fixedly connected to the working frame (1), the drive motor (302) is fixedly connected to the top surface of the motor frame (301), the drive crossbar (303) is rotatably connected to the working frame (1), one end of the drive crossbar (303) is fixedly connected to the output shaft of the drive motor (302), and the other end of the drive crossbar (303) passes through the working frame (1) and is fixedly connected to the drive gear (304). Two sets of drive slots (306) are provided on the working frame (1), and the drive rack (305) is slidably connected to the drive slot (306). The two sets of drive racks (305) are located on the upper and lower sides of the drive gear (304), and both sets of drive racks (305) mesh with the drive gear (304).

3. The anti-deformation welding fixture for the motor rotor core shaft according to claim 2, characterized in that, The positioning part includes a positioning frame (307), a positioning block (308), a positioning frame (309), a positioning rod (310), and an abutting turntable (311). The positioning frame (307) is fixedly connected to the end of the drive rack (305). The positioning block (308) is elastically slidably connected inside the positioning frame (307). The positioning frame (309) is fixedly connected to the side of the positioning block (308). The positioning rod (310) is elastically slidably connected to the positioning frame (309). The abutting turntable (311) is rotatably connected to one end of the positioning rod (310) near the iron core shaft.

4. The anti-deformation welding fixture for the motor rotor core shaft according to claim 1, characterized in that, The anti-deformation component (4) includes a mounting plate (401), a connecting plate (402), a connecting cylinder (403), a clamping ring (404), a first transmission ring (405), a first transmission rod (406), and a second transmission ring (407). The mounting plate (401) is fixedly connected to the working frame (1), and the connecting plate (402) is elastically slidably connected to the mounting plate (401). The connecting cylinder (403) is rotatably connected to the inner circumferential wall of the connecting plate (402). A clamping ring (404) is fixedly connected to one end of the connecting cylinder (403) near the support platform (2). The first transmission ring (405) is slidably connected to the inner circumferential wall of the connecting plate (406). The transmission rod (406) has one end that passes through the connecting plate (402) and is fixedly connected to the first transmission ring (405). The first transmission ring (405) is located at the end of the connecting cylinder (403) away from the support platform (2). The inner circumferential wall of the first transmission ring (405) is spaced apart from the outer circumferential wall of the connecting cylinder (403). The second transmission ring (407) is located between the connecting plate (402) and the clamping ring (404). The second transmission ring (407) is elastically connected to the clamping ring (404). The other end of the first transmission rod (406) passes through the connecting plate (402) and abuts against the second transmission ring (407).

5. The anti-deformation welding fixture for the motor rotor core shaft according to claim 4, characterized in that, The anti-deformation component (4) also includes a second transmission rod (408), a clamping through groove (409), a transmission groove (410), a clamping block (411), and a liquid cooling hose (412). The second transmission ring (407) is fixedly connected to several sets of second transmission rods (408) arranged along the circumference. Several sets of clamping through grooves (409) arranged along the circumference are opened on the clamping ring (404). Several sets of clamping blocks (411) arranged along the circumference are elastically slidably connected to the side of the clamping ring (404) near the support platform (2). The clamping block (411) is provided with a transmission groove (410). The side wall of the transmission groove (410) opposite to the second transmission rod (408) is inclined. The positions of the second transmission rod (408), the clamping through groove (409), and the transmission groove (410) correspond to each other. The clamping block (411) is embedded with a liquid cooling hose (412).

6. The anti-deformation welding fixture for the motor rotor core shaft according to claim 3, characterized in that, The positioning rod (310) is coaxially spaced from the connecting cylinder (403), and the positioning rod (310) passes through the connecting cylinder (403).

7. The anti-deformation welding fixture for the motor rotor core shaft according to claim 2, characterized in that, The rotating part includes a transmission vertical rod (501), a transmission rack (502), a first transmission shaft (503), a transmission gear (504), a first bevel gear (505), a mounting base (506), a second transmission shaft (507), a second bevel gear (508), a sector gear (509), and a gear ring (510). The transmission vertical rod (501) is fixedly connected to the bottom surface of the drive rack (305), and the lower end of the transmission vertical rod (501) is fixedly connected to the transmission rack (502). The first transmission shaft (503) is rotatably connected to the working frame (1), and a transmission gear (504) is fixedly connected to the first transmission shaft (503). The transmission gear (504) meshes with the transmission rack (502), the mounting base (506) is fixedly connected to the working frame (1), the second transmission shaft (507) is rotatably connected to the mounting base (506), the second transmission shaft (507) is fixedly connected with the second bevel gear (508) and the sector gear (509), the first bevel gear (505) meshes with the second bevel gear (508), the gear ring (510) is fixedly connected to the outer peripheral wall of the end of the connecting cylinder (403) away from the support platform (2), and the sector gear (509) meshes with the gear ring (510).

8. The anti-deformation welding fixture for the motor rotor core shaft according to claim 7, characterized in that, The welding section includes a sliding cylinder (511), a welding table (512), and a welding gun (513). The welding table (512) is slidably connected to the working frame (1), and the sliding cylinder (511) is fixedly connected to the working frame (1). The piston rod of the sliding cylinder (511) is fixedly connected to the welding table (512). Two sets of welding guns (513) are fixedly connected to the top surface of the welding table (512). The two sets of welding guns (513) are located on both sides of the iron core shaft.

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