Welding device for electric automobile part production

Abstract

The invention relates to the technical field of electric automobile part machining, in particular to a welding device for electric automobile part production, and space synchronous following control of a welding gun and a rolling mechanism is achieved through cooperation of a sliding mechanism and a touch mechanism. When the welding gun conducts welding on the upper surface of the battery box, the touch mechanism drives the lower connecting rod to drive the rolling mechanism to move to the position under a welding seam in real time, and rolling force perpendicular to the welding seam is applied. In the process, the plastic deformation compensation of the rolling mechanism on the welding seam area can offset the welding shrinkage stress, so that the residual stress peak value of the aluminum alloy battery box is reduced, the buckling deformation is effectively inhibited, and the assembly precision of the battery module is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of electric vehicle parts processing, and more specifically to a welding device used for producing electric vehicle parts. Background Art

[0002] With the development of lightweight electric vehicles, aluminum alloys (such as 6 series and 5 series) have become the mainstream material for power battery boxes due to their low density and high specific strength. However, aluminum alloys have high thermal conductivity (about 160-220 W / m·K) and large thermal expansion coefficient (23.6×10⁻ 6 / ℃), local high temperature (molten pool temperature > 600℃) and rapid cooling during welding lead to significant thermal stress concentration, which in turn causes the following problems: Battery box size out of tolerance: After the welding residual stress is released, the flatness error of the aluminum alloy battery box can reach 1-3mm / ㎡, affecting the assembly accuracy of the battery module.

[0003] Risk of sealing failure: Local deformation caused by thermal stress causes microcracks in the weld area, which may cause electrolyte leakage under long-term vibration loads.

[0004] Reduced fatigue life: The residual tensile stress is superimposed on the mechanical stress of the battery charge and discharge cycle, which accelerates the expansion of fatigue cracks and threatens the safety of the battery system.

[0005] The solutions currently adopted by the industry mainly include the following three categories, but all of them have significant defects: 1. Post-processing method (such as vibration aging, thermal aging): The battery box needs to be subjected to overall stress relief after welding, which takes up to 2-4 hours and cannot meet the efficient production rhythm (usually requiring a single-piece production cycle of less than 30 minutes).

[0006] 2. Welding parameter optimization method: Reduce the heat affected zone by reducing heat input (such as pulse MIG welding), but due to the high thermal conductivity of aluminum alloy, the actual stress reduction is limited (only 10%-15%), and the welding depth and strength may be sacrificed.

[0007] 3. Composite cooling device: Using water-cooled copper liner or liquid nitrogen spray for forced cooling can reduce the peak temperature, but it will cause a sharp increase in temperature gradient (local temperature difference > 400℃ / mm), which will in turn increase the interlayer shear stress.

[0008] Rolling while welding is an effective method to release thermal stress in the weld area through synchronous mechanical rolling, but it faces the following challenges in the battery box welding scenario: Poor equipment compatibility: The traditional rolling while welding mechanism needs to be integrated at the end of the welding robot, which occupies a large space and seriously interferes with the existing welding gun posture and path planning. The modification cost is high and the rolling accuracy is insufficient: The battery box welds are mostly distributed in spatial curves (such as special-shaped splicing seams). The rigidity and pressure control accuracy (±50N) of the existing rolling wheel are difficult to adapt to complex trajectories, which can easily cause rolling dislocation or secondary deformation; Low production line adaptability: The power battery box production line is mostly multi-station parallel layout, and the traditional solution requires shutdown to modify the welding tooling, affecting mass production efficiency.

[0009] Based on the above problems, there is an urgent need for a welding and rolling mechanism that can be quickly deployed on the production line without major adjustments to the existing welding equipment, so as to achieve efficient suppression of thermal stress while ensuring the welding accuracy of the aluminum alloy battery box. Summary of the invention

[0010] The object of the present invention is to provide a welding device for producing electric vehicle parts to solve the problems raised in the above background technology.

[0011] To achieve the above object, the present invention provides the following technical solution: A welding device for producing electric vehicle parts, comprising a base and a support frame installed on the base and used to carry the parts, A welding assembly is also installed on the side of the base, and the welding assembly includes a longitudinal adjustment mechanism arranged on the side of the base and a trigger mechanism installed on the longitudinal adjustment mechanism; Two sliding mechanisms are arranged on the same side of the trigger mechanism, and an upper connecting rod and a lower connecting rod are arranged inside the two sliding mechanisms respectively. One end of the upper connecting rod and the lower connecting rod are connected to a welding gun and a rolling mechanism respectively, and the welding gun and the rolling mechanism are respectively placed on the upper and lower sides of the support frame, and the rolling mechanism is used to roll the weld at the bottom surface of the part; A stabilizing mechanism is also connected between the other ends of the upper connecting rod and the lower connecting rod.

[0012] A further technical solution of the present application is as follows: the trigger mechanism comprises a vertical frame installed above the longitudinal adjustment mechanism and a second motor installed at the top of the vertical frame, the power output shaft of the second motor extends into the vertical frame and is connected to one end of the first screw, the other end of the first screw is connected to one end of the second screw, the threads of the first screw and the second screw are in opposite directions, and the first screw and the second screw are both connected to longitudinal screw sleeves on their outer sides; The two sliding mechanisms are slidably installed on the same side of the vertical frame and are respectively connected with corresponding longitudinal screw sleeves.

[0013] A further technical solution of the present application is as follows: the sliding mechanism includes a sliding sleeve that is slidably connected to the outside of the vertical frame at the side, and the sliding sleeve is connected to the corresponding longitudinal screw sleeve, and both ends of the sliding sleeve are open structures. The upper connecting rod and the lower connecting rod are respectively slidably connected to the corresponding sliding sleeves. A groove is opened through the bottom of a single sliding sleeve, and a plurality of rollers are arranged in the groove. The bottom surfaces of the upper connecting rod and the lower connecting rod are correspondingly provided with rolling grooves, and the rollers are cooperatively connected to the rolling grooves.

[0014] A further technical solution of the present application is that the rolling mechanism includes a mounting seat mounted above one end of the lower connecting rod and two mounting grooves symmetrically arranged on both sides of the mounting seat, a rotating shaft seat is installed inside each mounting groove, one end of the connecting rod is rotatably connected to the outer side of the rotating shaft seat, and the other end of the connecting rod is rotatably connected to the roller; A plurality of pull-back grooves are also provided in the mounting seat, and a pull-back spring is arranged in a single pull-back groove, and both ends of the pull-back spring are connected to the side surfaces of the connecting rod in the two mounting grooves.

[0015] A further technical solution of the present application is that the stabilizing mechanism comprises an adjusting rod and an adjusting cylinder which are plugged in and matched with each other, and the two ends of the adjusting rod and the adjusting cylinder which are far away from each other are respectively connected to the upper connecting rod and the lower connecting rod; One end of the adjusting rod located inside the adjusting cylinder is also connected to a limit block, and a through inner cavity is opened inside the limit block. Two movable seats are symmetrically slidably arranged inside the inner cavity, and a tightening spring is connected between the sides of the two movable seats that are close to each other. The sides of the two movable seats that are far away from each other are both embedded with balls. A number of adjustment grooves are opened on the sides of the adjusting cylinder corresponding to the balls, and the balls are embedded in the adjustment grooves.

[0016] A further technical solution of the present application is as follows: a stabilizing block is further provided on the outer side of the limiting block, and two stabilizing grooves are provided on the side surfaces of the adjusting cylinder corresponding to the stabilizing block.

[0017] A further technical solution of the present application is that an adjusting cylinder is also arranged outside the upper sliding sleeve, and the end of the adjusting cylinder is connected to the side of the upper connecting rod.

[0018] A further technical solution of the present application is as follows: the longitudinal adjustment mechanism comprises a side frame arranged on the side of the base and a first motor installed at one end of the side frame, the power output shaft of the first motor extends to the inside of the side frame and is connected to a third screw, the outer side of the third screw is threadedly connected to an adjusting screw sleeve, the outer side of the adjusting screw sleeve is connected to one end of an inner pin, the outer side of the side frame is also connected to a buckle, and the other end of the inner pin is connected to the inside of the buckle; The trigger mechanism is installed above the buckle.

[0019] A further technical solution of the present application is as follows: the lower end surface of the support frame is connected to the upper surface of the base through a plurality of support rods.

[0020] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: Through the coordinated cooperation of the sliding mechanism and the trigger mechanism, the spatial synchronous following control of the welding gun and the rolling mechanism is realized. When the welding gun is welding on the upper surface of the battery box, the trigger mechanism drives the lower connecting rod to drive the rolling mechanism to move to the bottom of the weld in real time, applying a rolling force perpendicular to the weld. In this process, the plastic deformation compensation of the weld area by the rolling mechanism can offset the welding shrinkage stress, reduce the residual stress peak of the aluminum alloy battery box, effectively suppress warping deformation, and ensure the assembly accuracy of the battery module.

[0021] Based on the symmetrical reverse movement of the bidirectional screw drive and the longitudinal screw sleeve, the two sliding mechanisms can synchronously move in the opposite direction along the vertical frame, driving the upper and lower connecting rods to realize the mirror-symmetrical movement of the welding gun and the rolling mechanism. The low-friction sliding design of the roller and the rolling groove in the sliding sleeve ensures that the trajectory of the rolling mechanism and the welding gun will not deviate, meeting the precise tracking requirements of the special-shaped welds of the battery box; at the same time, the stabilizing mechanism forms a multi-point contact rigid constraint through the telescopic locking structure of the adjusting rod and the adjusting cylinder, combined with the meshing positioning of the ball and the adjusting groove. When the trigger mechanism drives the sliding mechanism, the stabilizing mechanism can absorb vibration energy and suppress the deviation caused by mechanical transmission gap or external disturbance, so that the rolling mechanism can be stably attached to the lower surface of the battery box bottom plate, stably fitting the weld. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the top view of the structure of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure at A in the middle; Figure 5 It is a cross-sectional structural schematic diagram of the stabilizing mechanism of the present invention; Figure 6 For the present invention Figure 5 A schematic diagram of the enlarged structure at B in the middle; Figure 7 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 8 For the present invention Figure 7 Schematic diagram of the enlarged structure at point C in the middle.

[0023] Explanation of the symbols in the schematic diagram: 1. Base; 2. Side frame; 3. First motor; 4. Lower connecting rod; 5. Adjustment tube; 6. Adjustment rod; 7. Upper connecting rod; 8. Adjustment cylinder; 9. Second motor; 10. Vertical frame; 11. First screw; 12. Second screw; 13. Sliding sleeve; 14. Welding gun; 15. Support frame; 16. Limit block; 17. Stabilizing block; 18. Mounting seat; 19. Mounting groove; 20. Connecting rod; 21. Rotating shaft seat; 22. Pull-back spring; 23. Pull-back groove; 24. Roller; 25. Stabilizing groove; 26. Moving seat; 27. Clamping spring; 28. Inner cavity; 29. ​​Third screw; 30. Buckle; 31. Inner pin; 32. Adjustment screw sleeve; 33. Slot; 34. Roller; 35. Rolling groove; 36. Adjustment groove; 37. Ball; 38. Support rod. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The present invention is further described below in combination with the embodiments.

[0025] See also Figures 1 to 8 In one embodiment of the present application, a welding device for producing electric vehicle parts includes a base 1 and a support frame 15 mounted on the base 1 and used to carry parts. A welding assembly is also installed on the side of the base 1, and the welding assembly includes a longitudinal adjustment mechanism arranged on the side of the base 1 and a trigger mechanism installed on the longitudinal adjustment mechanism; Two sliding mechanisms are arranged on the same side of the trigger mechanism, and an upper connecting rod 7 and a lower connecting rod 4 are arranged inside the two sliding mechanisms respectively. One end of the upper connecting rod 7 and the lower connecting rod 4 are connected to a welding gun 14 and a rolling mechanism respectively, and the welding gun 14 and the rolling mechanism are respectively placed on the upper and lower sides of the support frame 15, and the rolling mechanism is used to roll the weld at the bottom surface of the part; A stabilizing mechanism is also connected between the other ends of the upper connecting rod 7 and the lower connecting rod 4 .

[0026] Furthermore, the longitudinal adjustment mechanism includes a side frame 2 arranged on the side of the base 1 and a first motor 3 installed at one end of the side frame 2, the power output shaft of the first motor 3 extends to the inside of the side frame 2 and is connected to a third screw 29, the outer side of the third screw 29 is threadedly connected to an adjusting screw sleeve 32, the outer side of the adjusting screw sleeve 32 is connected to one end of an inner pin 31, the outer side of the side frame 2 is also connected to a buckle 30, and the other end of the inner pin 31 is connected to the inside of the buckle 30; The trigger mechanism is installed above the buckle 30 .

[0027] Furthermore, the lower end surface of the support frame 15 is connected to the upper surface of the base 1 through a plurality of support rods 38 .

[0028] This embodiment is implemented as follows: In actual use, the battery box bottom plate needs to be placed on the support frame 15 so that the battery box bottom plate is suspended as a whole and the bottom surface is exposed. As for which support frame 15 and which clamp to use for alignment and positioning, there are a lot of existing technologies at this stage, so they are not specifically described here. After the erection is completed, welding operation is required, which is mainly achieved by the welding assembly, and the welding assembly is displaced by the longitudinal adjustment mechanism, the purpose of which is to adjust the position of the welding assembly on the side of the base 1 and control the overall position of the welding assembly. The trigger mechanism and the sliding mechanism cooperate with each other to adjust the welding gun 14 and the rolling mechanism to be close to each other, so that during the welding process, the upper weld position corresponding to the bottom surface of the bottom plate of the battery box is accurately pre-rolled, and synchronous moving rolling can be achieved during the moving welding process of the welding gun 14. A stabilizing mechanism is also connected between the other ends of the upper connecting rod 7 and the lower connecting rod 4. The purpose of this stabilizing mechanism is to prevent large-scale shaking during the process of the welding gun 14 and the rolling mechanism approaching each other, so that the device is more stable during use. The lateral adjustment of the welding position is adjusted by the sliding mechanism, so that pre-rolling can be achieved in advance during welding, and synchronous following rolling can be achieved during the moving welding process, so as to eliminate thermal stress and improve processing accuracy.

[0029] See also Figure 1 , Figure 2 , Figure 3 , Figure 7 and Figure 8 As a preferred embodiment of the present application, the trigger mechanism includes a vertical frame 10 installed above the longitudinal adjustment mechanism and a second motor 9 installed at the top of the vertical frame 10. The power output shaft of the second motor 9 extends into the vertical frame 10 and is connected to one end of the first screw 11. The other end of the first screw 11 is connected to one end of the second screw 12. The threads of the first screw 11 and the second screw 12 are in opposite directions. The outer sides of the first screw 11 and the second screw 12 are both matched and connected with longitudinal screw sleeves 32. The two sliding mechanisms are slidably mounted on the same side of the vertical frame 10 and are respectively connected to the corresponding longitudinal screw sleeves 32 .

[0030] Furthermore, the sliding mechanism includes a sleeve 13 that is slidably connected to the outside of the vertical frame 10 at the side, and the sleeve 13 is connected to the corresponding longitudinal screw sleeve 32. The two ends of the sleeve 13 are open structures. The upper connecting rod 7 and the lower connecting rod 4 are respectively slidably connected in the corresponding sleeves 13. A groove 33 is opened through the bottom of a single sleeve 13, and a plurality of rollers 34 are arranged in the groove 33. The bottom surfaces of the upper connecting rod 7 and the lower connecting rod 4 are correspondingly provided with rolling grooves 35, and the rollers 34 are cooperatively connected in the rolling grooves 35.

[0031] Furthermore, an adjusting cylinder 8 is also provided outside the upper sliding sleeve 13 , and the end of the adjusting cylinder 8 is connected to the side of the upper connecting rod 7 .

[0032] This embodiment is implemented as follows: the welding assembly is specifically composed of a vertical frame 10, an upper connecting rod 7 and a lower connecting rod 4. A first screw rod 11 and a second screw rod 12 are arranged in the vertical frame 10, and the two are synchronously driven by a second motor 9, so as to achieve synchronous rotation. Since the outer threads of the two are in opposite directions, the longitudinal screw sleeves 32 arranged on the outer sides of the first screw rod 11 and the second screw rod 12 will move in opposite directions at this time, and will synchronously drive the sliding mechanisms connected to each other to move during the movement. The sliding mechanism is composed of a sliding sleeve 13 cooperating with the upper connecting rod 7 and the lower connecting rod 4. The upper connecting rod 7 and the lower connecting rod 4 are respectively inserted into the two sliding sleeves 13. In this way, when the two longitudinal screw sleeves 32 are displaced, the sliding sleeves 13 and the upper and lower connecting rods 4 connected to each other will be driven to move. When they are close to each other, the welding gun 14 and the rolling mechanism will be driven to move synchronously, and vice versa.

[0033] As for the adjustment of the welding position, the upper connecting rod 7 is pushed out by the adjusting cylinder 8, and the stabilizing mechanism and the lower connecting rod 4 are simultaneously driven to move, thereby realizing the displacement of the rolling mechanism and the welding gun 14. In order to prevent the upper connecting rod 7 and the lower connecting rod 4 from being offset or stuck during the ejection process, a groove 33 is opened through the bottom of the sliding sleeve 13, and a plurality of rollers 34 are arranged in the groove 33. The bottom surfaces of the upper connecting rod 7 and the lower connecting rod 4 are correspondingly provided with rolling grooves 35, and the rollers 34 are cooperatively connected in the rolling grooves 35. When the upper connecting rod 7 and the lower connecting rod 4 move, the rollers 34 slide in the rolling grooves 35, thereby realizing the smooth displacement of the upper connecting rod 7 and the lower connecting rod 4.

[0034] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 As a preferred embodiment of the present application, the rolling mechanism includes a mounting seat 18 mounted above one end of the lower connecting rod 4 and two mounting grooves 19 symmetrically opened on both sides of the mounting seat 18, and a rotating shaft seat 21 is installed inside each mounting groove 19, and one end of a connecting rod 20 is rotatably connected to the outer side of the rotating shaft seat 21, and the other end of the connecting rod 20 is rotatably connected to a roller 24; A plurality of pull-back grooves 23 are also formed inside the mounting seat 18 . A pull-back spring 22 is disposed inside each pull-back groove 23 . Both ends of the pull-back spring 22 are connected to the side surfaces of the connecting rod 20 inside the two mounting grooves 19 .

[0035] This embodiment is implemented as follows: the rolling mechanism is realized by a mounting seat 18 and two rolling rollers 24 rotatably arranged on both sides of the mounting seat 18, the two rolling rollers 24 are connected to the outer side surfaces of the respective adjacent rotating shaft seats 21 by a connecting rod 20, and the connecting rods 20 are connected by a return spring 22, and the height of the rolling rollers 24 is higher than the mounting seat 18. In the process of the welding gun 14 and the rolling mechanism approaching, the rolling rollers 24 will contact the lower surface of the bottom plate of the battery box in advance, and after the contact, the two rolling rollers 24 will move away from each other due to the extrusion effect, thereby realizing the pre-rolling operation on both sides of the welding point.

[0036] It should be noted that there is no limitation on the installation method of the mounting base 18 and the lower connecting rod 4, and they can be either rotatable or fixed, depending on how welding is performed and the direction of welding. If the moving direction during welding is fixed, the mounting base 18 can be set to be fixed. If the welding direction is not fixed, the mounting base 18 can be set to be rotatable, which ensures that when the welding gun 14 moves back and forth, the roller 24 can also drive the mounting base 18 to rotate, thereby cooperating with the forward and backward movement trajectory of the welding gun 14.

[0037] See also Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7 As a preferred embodiment of the present application, the stabilizing mechanism includes an adjusting rod 6 and an adjusting cylinder 5 that are plugged in and matched with each other, and the two ends of the adjusting rod 6 and the adjusting cylinder 5 that are away from each other are respectively connected to the upper connecting rod 7 and the lower connecting rod 4; One end of the adjusting rod 6 located inside the adjusting cylinder 5 is also connected to the limit block 16, and a penetrating inner cavity 28 is opened inside the limit block 16. Two movable seats 26 are symmetrically and slidably arranged inside the inner cavity 28, and a tightening spring 27 is connected between the sides of the two movable seats 26 that are close to each other, and the sides of the two movable seats 26 that are far away from each other are both embedded with balls 37. A plurality of adjusting grooves 36 are opened on the sides of the adjusting cylinder 5 corresponding to the balls 37, and the balls 37 are embedded in the adjusting grooves 36.

[0038] Furthermore, a stabilizing block 17 is provided outside the limiting block 16 , and two stabilizing grooves 25 are provided inside the adjusting tube 5 on the side surfaces corresponding to the stabilizing block 17 .

[0039] As mentioned above, the main function of the stabilizing mechanism is to prevent large-scale shaking when the welding gun 14 and the rolling mechanism are approaching each other. This is mainly achieved through the matching connection between the adjusting rod 6 and the adjusting cylinder 5. The end of the adjusting rod 6 located inside the adjusting cylinder 5 is also connected to the limiting block 16. The limiting block 16 first ensures that the adjusting rod 6 will not separate from the adjusting cylinder 5. Secondly, two moving seats 26 are arranged inside the limiting block 16. The two moving seats 26 are connected by a clamping spring 27. Both ends of the two moving seats 26 are embedded with balls 37. During the movement of the limiting block 16, the ball 37 can fall into the adjusting groove 36 during the movement of the moving seat 26, and the clamping spring 27 will contract back and forth. The purpose is to allow the ball 37 in the moving seat 26 to switch the adjusting groove 36 back and forth to achieve the effect of movement and stability.

[0040] In summary, the present invention realizes the spatial synchronous following control of the welding gun 14 and the rolling mechanism through the coordinated cooperation of the sliding mechanism and the trigger mechanism. When the welding gun 14 is welding on the upper surface of the battery box, the trigger mechanism drives the lower connecting rod 4 to drive the rolling mechanism to move to the bottom of the weld in real time, and applies a rolling force perpendicular to the weld. In this process, the plastic deformation compensation of the weld area by the rolling mechanism can offset the welding shrinkage stress, reduce the residual stress peak of the aluminum alloy battery box, effectively suppress warping deformation, and ensure the assembly accuracy of the battery module.

[0041] Based on the bidirectional screw drive and the symmetrical reverse movement of the longitudinal screw sleeve 32, the two sliding mechanisms can synchronously move in the opposite direction along the vertical frame 10, driving the upper and lower connecting rods 4 to realize the mirror-symmetrical movement of the welding gun 14 and the rolling mechanism. The low-friction sliding design of the roller 34 and the rolling groove 35 in the sliding sleeve 13 ensures that the trajectory of the rolling mechanism and the welding gun 14 will not deviate, meeting the precise tracking requirements of the special-shaped welds of the battery box; at the same time, the stabilizing mechanism forms a multi-point contact rigid constraint through the telescopic locking structure of the adjusting rod 6 and the adjusting cylinder 5, combined with the meshing positioning of the ball 37 and the adjusting groove 36. When the trigger mechanism drives the sliding mechanism, the stabilizing mechanism can absorb vibration energy, suppress the deviation caused by mechanical transmission clearance or external disturbance, and make the rolling mechanism stably fit to the lower surface of the bottom plate of the battery box, stably fitting the weld.

[0042] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

[0043] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A welding device for producing electric vehicle parts, comprising a base (1) and a support frame (15) mounted on the base (1) and used to carry the parts, characterized in that: A welding assembly is also installed on the side of the base (1), and the welding assembly comprises a longitudinal adjustment mechanism arranged on the side of the base (1) and a trigger mechanism installed on the longitudinal adjustment mechanism; Two sliding mechanisms are arranged on the same side of the trigger mechanism, and an upper connecting rod (7) and a lower connecting rod (4) are arranged inside the two sliding mechanisms respectively. One end of the upper connecting rod (7) and the lower connecting rod (4) are connected to a welding gun (14) and a rolling mechanism respectively, and the welding gun (14) and the rolling mechanism are respectively arranged on the upper and lower sides of the support frame (15), and the rolling mechanism is used to roll the weld seam on the bottom surface of the part; A stabilizing mechanism is also connected between the other ends of the upper connecting rod (7) and the lower connecting rod (4).

2. A welding device for electric vehicle parts production according to claim 1, characterized in that: The trigger mechanism comprises a vertical frame (10) installed above the longitudinal adjustment mechanism and a second motor (9) installed at the top of the vertical frame (10); a power output shaft of the second motor (9) extends into the vertical frame (10) and is connected to one end of a first screw rod (11); the other end of the first screw rod (11) is connected to one end of a second screw rod (12); the threads of the first screw rod (11) and the second screw rod (12) are in opposite directions; and the first screw rod (11) and the second screw rod (12) are both matched and connected to the outer sides with longitudinal screw sleeves; The two sliding mechanisms are slidably mounted on the same side of the vertical frame (10) and are respectively connected to corresponding longitudinal screw sleeves.

3. A welding device for electric vehicle parts production according to claim 2, characterized in that: The sliding mechanism comprises a sliding sleeve (13) slidably connected to the outside of the vertical frame (10) at the side, and the sliding sleeve (13) is connected to a corresponding longitudinal screw sleeve (32), and both ends of the sliding sleeve (13) are open structures, and the upper connecting rod (7) and the lower connecting rod (4) are slidably connected to the corresponding sliding sleeves (13) respectively, and a groove (33) is formed through the bottom of a single sliding sleeve (13), and a plurality of rollers (34) are arranged in the groove (33), and the bottom surfaces of the upper connecting rod (7) and the lower connecting rod (4) are respectively provided with rolling grooves (35), and the rollers (34) are cooperatively connected in the rolling grooves (35).

4. A welding device for electric vehicle parts production according to claim 1, characterized in that: The rolling mechanism comprises a mounting seat (18) mounted above one end of the lower connecting rod (4) and two mounting grooves (19) symmetrically arranged on both sides of the mounting seat (18), a rotating shaft seat (21) being mounted inside each mounting groove (19), one end of a connecting rod (20) being rotatably connected to the outer side of the rotating shaft seat (21), and a roller (24) being rotatably connected to the other end of the connecting rod (20); A plurality of pull-back grooves (23) are also provided through the interior of the mounting seat (18), a pull-back spring (22) is provided inside each pull-back groove (23), and both ends of the pull-back spring (22) are connected to the side surfaces of the connecting rod (20) inside the two mounting grooves (19).

5. A welding device for electric vehicle parts production according to claim 1, characterized in that: The stabilizing mechanism comprises an adjusting rod (6) and an adjusting cylinder (5) which are plugged in and matched with each other, and two ends of the adjusting rod (6) and the adjusting cylinder (5) which are away from each other are respectively connected to an upper connecting rod (7) and a lower connecting rod (4); One end of the adjusting rod (6) located inside the adjusting cylinder (5) is also connected to the limit block (16), and a through inner cavity (28) is provided inside the limit block (16), and two movable seats (26) are symmetrically slidably arranged inside the inner cavity (28), and a tightening spring (27) is connected between the sides of the two movable seats (26) that are close to each other, and the sides of the two movable seats (26) that are away from each other are both embedded with balls (37), and a plurality of adjusting grooves (36) are provided on the sides of the adjusting cylinder (5) corresponding to the balls (37), and the balls (37) are embedded in the adjusting grooves (36).

6. A welding device for electric vehicle parts production according to claim 5, characterized in that: A stabilizing block (17) is also provided outside the limiting block (16), and two stabilizing grooves (25) are provided inside the adjusting tube (5) on the side surfaces corresponding to the stabilizing block (17).

7. A welding device for electric vehicle parts production according to claim 3, characterized in that: An adjusting cylinder (8) is also arranged outside the upper sliding sleeve (13), and the end of the adjusting cylinder (8) is connected to the side of the upper connecting rod (7).

8. A welding device for electric vehicle parts production according to claim 1, characterized in that: The longitudinal adjustment mechanism comprises a side frame (2) arranged on the side of the base (1) and a first motor (3) installed at one end of the side frame (2); the power output shaft of the first motor (3) extends into the inside of the side frame (2) and is connected to a third screw rod (29); the outer side of the third screw rod (29) is threadedly connected to an adjusting screw sleeve (32); the outer side of the adjusting screw sleeve (32) is connected to one end of an inner pin (31); the outer side surface of the side frame (2) is also connected to a buckle (30); and the other end of the inner pin (31) is connected to the inside of the buckle (30); The trigger mechanism is installed above the buckle (30).

9. A welding device for electric vehicle parts production according to claim 1, characterized in that: The lower end surface of the support frame (15) is connected to the upper surface of the base (1) via a plurality of support rods (38).

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