New energy stator core weld joint non-protruding end face welding process and welding device thereof

Abstract

The welding device comprises a welding mold and a laser welding gun, the welding mold comprises an upper mold and a lower mold, the lower mold is provided with a positioning column for sleeving and positioning the stator iron core, grooves are formed in the side walls of the upper mold and the lower mold and correspond to the weld joints, and the welding gun is arranged in the grooves. Copper blocks are fixedly arranged in the grooves, vertical grooves corresponding to welding seams are formed in the copper blocks, the top ends of the vertical grooves penetrate through and are used for being communicated with the welding seams, the copper blocks of the upper die and the lower die serve as the starting point and the ending point of laser welding in the welding process, the accuracy of the welding length is ensured, welding seam excess materials are not prone to adhering to the copper blocks in the welding process, and the welding quality is improved. The excess materials of the welding seam can fall into the vertical groove of the copper block, the situation that the welding seam protrudes out of the end face of the stator iron core is reduced, manual removal is not needed subsequently, procedures are effectively saved, and production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of stator core welding, and in particular to a welding process for a new energy stator core with a non-protruding weld end face and a welding device thereof. Background Art

[0002] The stator core is an important component of the motor's magnetic circuit. Together with the rotor core and the air gap between the stator and the rotor, it forms a complete magnetic circuit for the motor. The stator core is mainly composed of multiple axially stacked silicon steel sheets. In the actual production process, in order to increase the connection strength between the silicon steel sheets, an axial weld is usually provided on the side wall of the stator core. Welding is performed at the weld to further improve the connection strength and integrity. Currently, laser welding is mainly used for welding. In the actual welding process, the weld will partially protrude from the end face of the stator core, and the protruding weld residue needs to be manually removed later, affecting production efficiency. Summary of the invention

[0003] In order to further improve production efficiency, the present application provides a new energy stator core weld seam non-protruding end face welding device.

[0004] The present application provides a new energy stator core weld seam non-protruding end face welding device, which adopts the following technical solutions: A new energy stator core weld does not protrude from the end face welding device, including a welding mold and a laser welding gun, the welding mold includes an upper mold and a lower mold, the lower mold has a positioning column for the stator core to be sleeved and positioned, the side walls of the upper mold and the lower mold are both provided with grooves corresponding to the weld, a copper block is fixedly arranged in the groove, a vertical groove corresponding to the weld is provided on the copper block, and the top of the vertical groove passes through and is used to communicate with the weld.

[0005] Optionally, the vertical groove is vertically arranged and penetrated at both ends, and the bottom surface of the vertical groove along the depth direction is an arc surface.

[0006] Optionally, the groove includes an inner groove and an outer groove, the inner groove is adapted to the copper block, and the width of the outer groove gradually decreases from the outside to the inside.

[0007] Optionally, a mounting hole is provided on the copper block, and the copper block is fixed to the lower mold by screws, and the screws pass through the mounting hole, and the mounting hole is a vertical waist-shaped hole.

[0008] Optionally, a first driving source for driving the lower mold to rotate circumferentially is disposed at the bottom of the lower mold, and the laser welding gun is located on one side of the welding mold. The laser welding gun has a second driving source for driving the lower mold to rise and fall vertically.

[0009] Optionally, a mounting block is detachably connected to the lower mold, and a plurality of the mounting blocks are evenly distributed around a circumference. The mounting block has a vertical positioning rod, and the top end of the positioning rod is conical.

[0010] Optionally, a scraper extending into the vertical groove is provided in the groove, the copper block is vertically slidably connected to the lower mold, the lower mold has a storage groove for vertically sliding and accommodating the copper block, the top wall of the lower mold is vertically slidably connected to a driving block, a linkage component for transmitting the reverse movement of the driving block and the copper block is provided between the driving block and the copper block, a reset member for driving the driving block to move upward and reset is provided on the lower mold, and the reset member drives the top end of the driving block to protrude from the top wall of the lower mold.

[0011] Optionally, the linkage assembly includes a gear and a rack, the gear is rotatably connected to the lower mold, the rack is vertically arranged and respectively meshed with both sides of the gear, one of the racks is fixed to the driving block, and the other rack is fixed to the copper block.

[0012] Optionally, a blowing nozzle is provided on the bottom side wall of the groove, and the blowing nozzle is connected to an air source. A push switch for controlling the opening of the blowing nozzle is provided on the lower mold, and the push switch is located below the copper block. The driving block moves up and resets, and the copper block moves down to contact the bottom end to open the blowing nozzle.

[0013] The present application also provides a new energy stator core weld seam non-protruding end face welding process, which has the advantage of improving production efficiency and adopts the following technical solutions: The new energy stator core weld seam does not protrude the end face welding process, using the above welding device, including the following steps: S1, placing the stator core to be welded on the lower die of the welding die and positioning it so that the weld seam corresponds to the vertical groove on the lower die; S2, pressing down and shaping the stator core to be welded; S3, driving the upper die to move downward to press the stator core to be welded, and welding the weld of the stator core to be welded; S4, rotate the lower die to switch the weld position until all welds are welded.

[0014] In summary, the present application includes at least one of the following beneficial technical effects: 1. During the welding process, the copper blocks of the upper and lower molds are used as the starting and end points of laser welding to ensure the accuracy of the welding length. In addition, the residual material of the weld is not easy to adhere to the copper block during welding. The residual material of the weld will fall into the vertical groove of the copper block, reducing the situation where the weld protrudes from the end face of the stator core. There is no need to remove it manually later, which effectively saves processes and improves production efficiency. 2. The copper block can be disassembled and replaced independently, and the width of the outer groove gradually decreases from the outside to the inside, which is convenient for the horizontal placement and installation of the copper block; 3. After the stator core is taken out from the lower die, the driving block moves the copper block downward and retracts into the storage slot under the action of the linkage assembly. During the downward movement of the copper block, the scraper moves in the vertical slot to scrape off the welding residue on the inner wall of the vertical slot, so as to avoid a large amount of welding residue remaining and accumulating in the vertical slot, affecting the subsequent use effect; 4. When the copper block moves downward and retracts, the bottom end of the rack triggers the press switch to drive the air nozzle to open. The air nozzle can simultaneously blow out the welding residue scraped out by the scraper and located on the top of the copper block, thereby realizing automatic removal of welding residue without manual operation, which is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the overall structural diagram of Example 1.

[0016] Figure 2 It is a stereoscopic diagram of the welding mold in Example 1 in an open mold state.

[0017] Figure 3 This is a flow chart of Example 2.

[0018] Figure 4 It is a cross-sectional view of the lower mold in Example 3.

[0019] Figure 5 It is a structural diagram of the blowing nozzle of the lower mold in Example 3.

[0020] Description of reference numerals: 1. Welding mold; 2. Laser welding gun; 3. Upper mold; 4. Lower mold; 5. Positioning column; 6. Groove; 7. Copper block; 8. Vertical groove; 9. Mounting block; 10. Positioning rod; 11. Inner groove; 12. Outer groove; 13. Mounting hole; 14. Screw; 15. First driving source; 16. Storage groove; 17. Driving block; 18. Gear; 19. Rack; 20. Scraper; 21. Reset member; 22. Blowing nozzle; 23. Press switch. DETAILED DESCRIPTION

[0021] The following is combined with Figure 1-5 This application is described in further detail.

[0022] Example 1 New energy stator core weld does not protrude end face welding device, such as Figure 1 and Figure 2As shown, it includes a welding mold 1 and a laser welding gun 2, wherein the welding mold 1 includes an upper mold 3 and a lower mold 4, the upper mold 3 is located above the lower mold 4, and a positioning column 5 for the stator core to be sleeved and positioned is convexly provided at the center of the lower mold 4, and an inwardly concave groove 6 is provided at the weld of the stator core corresponding to the upper mold 3 and the lower mold 4, and a copper block 7 detachably connected to it is fixedly arranged in the groove 6, and a vertical groove 8 corresponding to the weld is provided on the copper block 7, and the vertical groove 8 is vertically penetrated and the two ends penetrate the surface of the copper block 7, and after the stator core is placed, the top of the vertical groove 8 on the lower mold 4 is connected to the weld of the stator core.

[0023] In this way, during the welding process, the copper blocks 7 of the upper mold 3 and the lower mold 4 are used as the starting point and end point of laser welding to ensure the accuracy of the welding length. The weld residue is silicon steel, which is not easy to adhere to the copper block 7 during the welding process, that is, the weld residue is not easy to adhere to the end face of the stator core, and the weld residue will fall into the vertical groove 8 of the copper block 7 during the welding process, reducing the situation where the weld protrudes from the end face of the stator core, and no manual removal is required later, which effectively saves processes and improves production efficiency. The bottom surface of the vertical groove 8 along the depth is an arc surface, which makes the transition at the corner of the vertical groove 8 smoother, and the weld residue falling into the vertical groove 8 is not easy to get stuck at the corner and difficult to clean.

[0024] like Figure 1 and Figure 2 As shown, a plurality of mounting blocks 9 are detachably connected to the lower die 4, and the mounting blocks 9 and the lower die 4 are detachable by means of screws or bolts. A plurality of mounting blocks 9 are evenly distributed around the circumference of the lower die 4, and a positioning rod 10 is vertically arranged on each mounting block 9. The positioning rod 10 is used to adapt to the perforation of the lug on the outer circumference of the stator core, limit the rotation of the stator core relative to the lower die 4, and further improve the circumferential positioning effect of the stator core, and the top end of the positioning rod 10 is set in a cone shape, which makes it easier for the positioning rod 10 to penetrate into the perforation of the lug on the stator core, and facilitates the operation of placing the stator core on the lower die 4; the mounting blocks 9 can be disassembled and replaced independently, and only a single replacement is required when a single damage is encountered. Different positioning rods 10 can also be replaced for adaptation when encountering stator cores of different specifications, thereby improving the applicability of the lower die 4.

[0025] like Figure 1 and Figure 2 As shown, the groove 6 includes an inner groove 11 and an outer groove 12, wherein the inner groove 11 is adapted to the shape of the copper block 7, the width of the outer groove 12 gradually decreases from the outside to the inside, and the width of the smaller side of the outer groove 12 is equal to the width of the copper block 7. The outer groove 12 provides a larger installation space for the copper block 7, which is more convenient for the installation of the copper block 7.

[0026] like Figure 1 and Figure 2As shown, a mounting hole 13 is opened on the copper block 7, and the copper block 7 is fixed to the lower mold 4 by means of a screw 14 passing through the mounting hole 13, so that the copper block 7 and the lower mold 4 can be detachable. After long-term use, the copper block 7 can be independently disassembled and replaced to ensure that the lower mold 4 can be continuously used for a long time, wherein the mounting hole 13 is a waist-shaped hole, so that the vertical position of the copper block 7 can be fine-tuned during the installation process, thereby making the starting and ending positions of welding more accurate and the welding effect better.

[0027] like Figure 1 and Figure 2 As shown, a first driving source 15 for driving the circumferential rotation is provided at the bottom of the lower mold 4. The first driving source 15 can be a rotary cylinder. Since there are multiple circumferential welds on the stator core, the lower mold 4 can be driven to rotate by the rotary cylinder to adjust each weld to correspond to the laser welding gun 2, so as to achieve good welding of all welds. In addition, a second driving source for driving the vertical lifting and lowering is provided on the laser welding gun 2. The second driving source can be a linear motor or a linear cylinder, so as to drive the vertical movement of the laser welding gun 2, and finally achieve good welding from the bottom to the top of the stator core weld through the laser welding gun 2.

[0028] Example 2 A new energy stator core welding process with no protruding end face weld, such as Figure 3 As shown, this embodiment adopts the welding device of the above-mentioned embodiment 1, and this embodiment mainly includes the following steps: S1, stacking the stator punching sheets on the lower die 4 to form the stator core to be welded and positioning them, so that each weld seam on the stator core to be welded corresponds to the vertical slot 8 on the lower die 4 one by one; S2, pressing down and shaping the stator core to be welded; Specifically, a punching machine can be used or the upper die 3 can be directly driven downward, and the upper die 3 is lifted and lowered vertically by a hydraulic cylinder; S3, driving the upper mold 3 to move downward to press the stator core to be welded, and welding the weld of the stator core to be welded; The laser welding gun 2 is used for welding. The laser welding gun 2 takes the top of the copper block 7 on the lower mold 4 as the starting point and the bottom wall of the copper block 7 on the upper mold 3 as the end point. The laser welding gun 2 is lifted and lowered vertically to achieve welding of the stator core weld. S4, driving the lower die 4 to rotate and switch the weld position until all welds are welded; After completing the welding of one weld of the stator core, the lower mold 4 is driven by the rotary cylinder to rotate to the next weld corresponding to the laser welding gun 2, and then welding is performed, and this cycle is repeated until all welds of the stator core are welded. S5, cutting; The upper die 3 is driven upward to open the die, and the welded stator core is removed from the lower die 4.

[0029] Example 3 New energy stator core weld does not protrude end face welding device, such as Figure 4 and Figure 5 As shown, the difference between it and Example 1 is that the copper block 7 is vertically slidably connected to the lower mold 4, and a storage groove 16 is provided in the lower mold 4 for the copper block 7 to move downward and retract. At the same time, a driving block 17 is vertically slidably connected to the top wall of the lower mold 4. The driving block 17 is arranged one-to-one with each copper block 7, and a linkage component for transmitting the reverse movement of the two is arranged between the driving block 17 and the copper block 7. The linkage component includes a gear 18 and a rack 19. Two racks 19 are provided and are respectively meshed on both sides of the gear 18. The gear 18 is rotatably connected to the lower mold 4, one of which is fixed to the bottom end of the driving block 17, and the other rack 19 is fixed to the copper block 7. In this way, when the stator core is placed in the lower mold 4, the weight of the stator core drives the driving block 17 to move down, during which the copper block 7 is linked to move up the telescopic storage groove 16 and is located in the groove 6. After the stator core is placed, the copper block 7 moves up to its top and is flush with the top wall of the lower mold 4. In addition, a scraper 20 is arranged at the bottom wall of the lower mold 4 corresponding to the groove 6. The scraper 20 is used to extend into the vertical groove 8 of the copper block 7, and the two sides of the scraper 20 abut against the side walls of the vertical groove 8. The copper block 7 can simultaneously scrape off the weld residue in the vertical groove 8 during the vertical lifting process. There will not be a large amount of weld residue accumulation in the vertical groove 8, which effectively ensures the welding quality, and there is no need to manually clean the vertical groove 8 frequently. The copper block 7 can be used continuously for a long time, which effectively improves the durability.

[0030] like Figure 4 and Figure 5 As shown, a reset member 21 for driving the driving block 17 to vertically reset is provided in the lower die 4. The reset member 21 specifically adopts a reset spring. The bottom end of the reset spring is fixed to the lower die 4, and the top end of the reset spring is fixed to the rack 19 at the bottom of the driving block 17. The reset member 21 is used to drive the driving block 17 to reset by protruding from the top wall of the lower die 4. After removing the stator core, the reset member 21 drives the driving block 17 to move up and reset, during which the copper block 7 is linked to move down and retract into the receiving groove 16. Each time the copper block 7 moves down and retracts into the receiving groove 16, the scraper 20 slides vertically relative to the vertical groove 8 to scrape off the weld residue on the inner wall of the vertical groove 8, and the scraped weld residue is mainly concentrated on the top of the copper block 7.

[0031] like Figure 4 and Figure 5As shown, a blowing nozzle 22 is arranged at the bottom of the side wall of the inner groove 11 of the groove 6, and the blowing nozzle 22 is connected to a high-pressure gas source. The scraped weld residue can be blown out of the groove 6 by blowing air from the blowing nozzle 22, and there is no need to manually clean the scraped weld residue, which effectively improves convenience. A solenoid valve is arranged at the blowing nozzle 22, and a pressing switch 23 for controlling the opening and closing of the solenoid valve is arranged on the bottom wall of the storage groove 16. The pressing switch 23 is arranged below the copper block 7. When the stator core is removed, the driving block 17 moves upward under the action of the reset member 21. The copper block 7 is moved to reset, during which the linked copper block 7 moves down and retracts into the storage groove 16, and the synchronous scraper 20 scrapes off the residual weld material on the side wall of the vertical groove 8. The copper block 7 moves down to the bottom end and abuts against the pressing switch 23 to open the solenoid valve, and the blowing nozzle 22 works to blow the scraped weld residual material out of the groove 6, so as to realize automatic cleaning of the weld residual material, which is simple and convenient. When the copper block 7 moves up, it no longer contacts the pressing switch 23, the solenoid valve is closed, and the blowing nozzle 22 stops working, so as to achieve automatic opening and closing control, effectively save gas source, and achieve the purpose of good energy saving.

[0032] like Figure 4 and Figure 5 As shown, in this embodiment, the scraper 20 is horizontally slidably connected to the lower mold 4, and in other embodiments, the scraper 20 can also be threadedly connected to the lower mold 4, so that the position adjustment of the scraper 20 in the horizontal direction can be realized, ensuring that the scraper 20 is in a good scraping state, and when it is necessary to keep the copper block 7 always in the inner groove 11 of the groove 6 and not frequently lift and retract, it is only necessary to move the scraper 20 horizontally so that its end is located at the bottom of the copper block 7 to block its downward movement. At this time, the copper block 7 is always in the groove 6, and the drive block 17 is always retracted into the lower mold 4, realizing the multi-purpose of the scraper 20. When there is less weld residue in the vertical groove 8, the copper block 7 and the drive block 17 are avoided from being repeatedly lifted and lowered. The scraper 20 state can be adjusted according to actual use needs to determine whether to scrape the weld residue in the vertical groove 8.

[0033] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. New energy stator core weld seam does not protrude end face welding device, characterized by: The invention comprises a welding mould (1) and a laser welding gun (2), wherein the welding mould (1) comprises an upper mould (3) and a lower mould (4), wherein the lower mould (4) is provided with a positioning column (5) for positioning the stator core sleeve, and the side walls of the upper mould (3) and the lower mould (4) are provided with grooves (6) at positions corresponding to the weld seams, wherein a copper block (7) is fixedly arranged in the groove (6), and a vertical groove (8) corresponding to the weld seam is provided on the copper block (7), and the top end of the vertical groove (8) penetrates through and is used to communicate with the weld seam.

2. The new energy stator core weld non-protruding end face welding device according to claim 1 is characterized in that: The vertical groove (8) is arranged vertically and penetrates at both ends, and the bottom surface of the vertical groove (8) along the depth direction is an arc surface.

3. The new energy stator core weld seam non-protruding end face welding device according to claim 1 is characterized in that: The groove (6) comprises an inner groove (11) and an outer groove (12), the inner groove (11) is adapted to the copper block (7), and the width of the outer groove (12) gradually decreases from the outside to the inside.

4. The new energy stator core weld seam non-protruding end face welding device according to claim 1 is characterized in that: The copper block (7) is provided with a mounting hole (13), the copper block (7) and the lower mold (4) are fixed by means of screws (14), the screws (14) pass through the mounting hole (13), and the mounting hole (13) is a vertical waist-shaped hole.

5. The new energy stator core weld seam non-protruding end face welding device according to claim 1 is characterized in that: The bottom of the lower mold (4) is provided with a first driving source (15) for driving it to rotate in a circumferential direction. The laser welding gun (2) is located on one side of the welding mold (1). The laser welding gun (2) is provided with a second driving source for driving it to rise and fall vertically.

6. The new energy stator core weld seam non-protruding end face welding device according to claim 1 is characterized in that: The lower mold (4) is detachably connected to a mounting block (9), wherein a plurality of mounting blocks (9) are evenly distributed around a circumference, and a vertical positioning rod (10) is provided on the mounting block (9), wherein the top end of the positioning rod (10) is conical.

7. The new energy stator core weld seam non-protruding end face welding device according to claim 1 is characterized in that: A scraper (20) is arranged in the groove (6) and extends into the vertical groove (8); the copper block (7) is vertically slidably connected to the lower mold (4); the lower mold (4) has a receiving groove (16) for vertically slidingly receiving the copper block (7); the top wall of the lower mold (4) is vertically slidably connected to a driving block (17); a linkage component is arranged between the driving block (17) and the copper block (7) for driving the two to move in opposite directions; a reset member (21) is arranged on the lower mold (4) for driving the driving block (17) to move upward and reset; the reset member (21) drives the top end of the driving block (17) to protrude from the top wall of the lower mold (4).

8. The new energy stator core weld seam non-protruding end face welding device according to claim 7 is characterized in that: The linkage assembly comprises a gear (18) and a rack (19), wherein the gear (18) is rotatably connected to the lower die (4), and the rack (19) is vertically arranged and respectively meshed with two sides of the gear (18), wherein one of the racks (19) is fixed to the driving block (17), and the other rack (19) is fixed to the copper block (7).

9. The new energy stator core weld seam non-protruding end face welding device according to claim 8, characterized in that: A blowing nozzle (22) is arranged on the bottom side wall of the groove (6), and the blowing nozzle (22) is connected to an air source. A pressing switch (23) for controlling the opening of the blowing nozzle (22) is arranged on the lower mold (4), and the pressing switch (23) is located below the copper block (7). The driving block (17) moves upward to reset and the copper block (7) moves downward to contact the bottom end of the pressing switch (23) to open the blowing nozzle (22).

10. The welding process of the new energy stator core weld without protruding end surface is characterized by: The welding device according to any one of claims 1 to 9 comprises the following steps: S1, placing the stator core to be welded on the lower mold (4) of the welding mold (1) and positioning it so that the weld seam corresponds to the vertical groove (8) on the lower mold (4); S2, pressing down and shaping the stator core to be welded; S3, driving the upper mold (3) to move downward to press the stator core to be welded, and welding the weld of the stator core to be welded; S4, rotating the lower die (4) to switch the welding seam positions until all the welding seams are completed.

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