A welding device and method for a new energy automobile battery box

Abstract

The application discloses a kind of welding device and method of new energy automobile battery box, specifically related to box welding technical field, including device base, the top end of device base is fixedly installed linear electric actuator, the moving end of linear electric actuator is equipped with positioning mechanism, the top end of device base one side is fixedly installed welding mechanism;The welding mechanism includes mechanism longitudinal frame, the top end of mechanism longitudinal frame is fixedly installed in device base, the top end of mechanism longitudinal frame is fixedly installed with two first X axial linear module and two second X axial linear module, this welding device is welded by setting welding mechanism, uses laser welding machine to carry out automatic laser welding processing to new energy automobile battery box welding position, and by using polishing piece, automatic polishing treatment is carried out to welding protrusion in time, and automatic cleaning the waste chip generated by polishing, prevent waste chip stick and cover in the inner wall of new energy automobile battery box and cause influence.

Description

Technical Field

[0001] This invention relates to the field of battery box welding technology, specifically to a welding device and method for a new energy vehicle battery box. Background Technology

[0002] As the core protective and load-bearing structure of power batteries in new energy vehicles, the battery box must simultaneously achieve multiple functions such as physical protection, thermal management, electrical safety, and lightweighting. Currently, the mainstream materials used for new energy vehicle battery boxes are lightweight materials such as aluminum alloy and high-strength steel. Their structural forms are mainly divided into aluminum profile boxes, cast aluminum boxes, and sheet metal boxes. The load-bearing structures include two types: base plate load-bearing and frame load-bearing. Different structures and materials of the boxes place different requirements on the welding process. The welding quality of the battery box directly determines its structural strength, sealing performance, and service life. Existing battery box welding equipment mainly adopts traditional welding processes with corresponding equipment, commonly including tungsten inert gas welding (TIG welding), gas metal arc welding (MIG welding), friction stir welding (FSW), and laser welding. Traditional battery box welding equipment still has some problems in practical use: First, the welded joints of the new energy vehicle battery box will have protruding weld points. In order to ensure the effective installation of the battery later, these points need to be ground separately, which affects the overall processing efficiency. Second, the welding station often uses a multi-point clamping and positioning mechanism to clamp, position and splice each workpiece. During welding, the coverage of each clamping point may affect the welding of the components, thus affecting the welding efficiency of the box. To address these issues, we propose a welding device and method for new energy vehicle battery boxes. Summary of the Invention

[0003] The purpose of this invention is to provide a welding device and method for battery boxes of new energy vehicles to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a welding device for a new energy vehicle battery box, comprising a device base, a linear electric actuator fixedly installed at the top of the device base, a positioning mechanism provided at the moving end of the linear electric actuator, and a welding mechanism fixedly installed on one side of the top of the device base; The welding mechanism includes a longitudinal frame, which is fixedly installed at the top of the device base. Two first X-axis linear modules and two second X-axis linear modules are fixedly installed at the top of the longitudinal frame. A first Y-axis linear module is fixedly installed at the moving end of the two first X-axis linear modules, and a second Y-axis linear module is fixedly installed at the moving end of the two second X-axis linear modules. A welding component is fixedly installed at the moving end of the first Y-axis linear module, and a grinding component is fixedly installed at the moving end of the second Y-axis linear module.

[0005] As a preferred embodiment of the present invention, the welded component includes a first Z-axis linear module, the first Z-axis linear module is fixedly installed on the moving end of the first Y-axis linear module, a first longitudinal frame is fixedly installed on the moving end of the first Z-axis linear module, a first outer cylinder is vertically installed at the bottom of the first longitudinal frame, a first rotating shaft is rotatably installed at the end of the first outer cylinder, a welding bracket is fixedly installed at the bottom of the first rotating shaft, and a laser welding machine is fixedly installed at the bottom of the welding bracket.

[0006] As a preferred embodiment of the present invention, the grinding component includes a second Z-axis linear module, which is fixedly mounted on the moving end of the second Y-axis linear module. A second longitudinal frame is fixedly mounted on the moving end of the second Z-axis linear module. A rotating bottom frame is fixedly mounted on the bottom of the second longitudinal frame. A second rotating shaft is rotatably mounted on the bottom of the rotating bottom frame. A rotating side frame is fixedly mounted on the end of the second rotating shaft. A rotating longitudinal tube is rotatably mounted on the end of the rotating side frame. A grinding assembly is provided at the bottom of the rotating longitudinal tube.

[0007] As a preferred embodiment of the present invention, the grinding assembly includes a cleaning cover, the bottom of the rotating longitudinal tube is fixedly fastened to the top of the cleaning cover, one bottom corner of the cleaning cover is open, a grinding shaft is rotatably mounted on one side of the cleaning cover via a bearing, the grinding shaft is inclined, a grinding head is fixedly mounted on the bottom of the grinding shaft, a cooling cavity is formed at the bottom of the grinding shaft, an outer channel is formed on the outside of the grinding shaft, an inner channel is formed along the axis in the middle of the grinding shaft, the bottoms of the outer channel and the inner channel are connected to the cooling cavity, a liquid inlet groove is formed at the top of the outer channel, and the inner channel... A liquid outlet groove is provided at the top. The liquid inlet groove and the liquid outlet groove extend outward from the outside of the grinding shaft. A liquid guide cylinder is provided on the side of the outer wall of the grinding shaft near the liquid inlet groove and the liquid outlet groove. A second sealing rotating component is fixedly installed between the inner wall of the liquid guide cylinder and the outer wall of the grinding shaft. A liquid guide head is fixedly installed in the middle of the liquid guide cylinder. A liquid guide hose is fixedly installed at the end of the liquid guide head. The liquid guide hose is fixedly clamped on the cleaning cover. One end of the liquid guide hose extends outward from the outside of the cleaning cover and movably passes through the rotating side frame. A first motor is fixedly installed on one side of the cleaning cover. The drive end of the first motor is fixedly installed at the top of the grinding shaft.

[0008] As a preferred embodiment of the present invention, a third sealing rotating component is fixedly installed on the top of the rotating longitudinal tube, a suction head is fixedly installed in the middle of the third sealing rotating component, a fixed bracket is fixedly installed on the outer side of the suction head, the fixed bracket is fixedly installed on the top of the rotating side frame, an L-shaped bracket is fixedly installed on the side end of the second longitudinal frame, a suction pipe is fixedly installed on the outer end of the L-shaped bracket, a suction hose is fixedly installed on the bottom end of the suction pipe and the top end of the suction head, a liquid guiding pipe corresponding to the liquid guiding hose is fixedly installed on the L-shaped bracket, and a flow guiding hose is fixedly installed on the bottom end of the liquid guiding pipe and the top end of the corresponding liquid guiding hose.

[0009] As a preferred embodiment of the present invention, transmission worm gears are fixedly installed on the outer sides of the first rotating shaft, the second rotating shaft, and the rotating longitudinal tube. Transmission worms are meshed with the outer sides of the transmission worm gears. The transmission worms are rotatably installed on the corresponding first outer cylinder, rotating bottom frame, and rotating side frame. A second motor is fixedly installed on the first outer cylinder, rotating bottom frame, and rotating side frame. The drive end of the second motor is fixedly installed on the shaft end of the corresponding transmission worm.

[0010] As a preferred embodiment of the present invention, the positioning mechanism includes a base frame, which is fixedly installed on the moving end of the linear electric actuator. A positioning support frame is fixedly installed at the top of the base frame, and a positioning middle frame is provided in the middle of the positioning support frame. A supporting base frame is fixedly installed in the positioning middle frame. Guide crossbars are vertically installed around the positioning support frame and the positioning middle frame. An inner fixing member is provided on the side of the guide crossbar near the positioning middle frame, and an outer fixing member is provided on the side of the guide crossbar near the positioning support frame.

[0011] As a preferred embodiment of the present invention, the inner fixing component includes an inner fixing slide, which is slidably mounted on a guide crossbar. A plurality of T-shaped supports are fixedly mounted on the top of the inner fixing slide. A first telescopic cylinder is provided on the side of the inner fixing slide near the positioning frame. The first telescopic cylinder is fixedly clamped on the positioning frame, and the telescopic end of the first telescopic cylinder is fixedly mounted on the inner fixing slide.

[0012] As a preferred embodiment of the present invention, the outer fixed component includes an outer fixed slide, which is slidably mounted on a guide crossbar. Multiple third Z-axis linear modules are vertically mounted on the top of the outer fixed slide. A clamping longitudinal rod is fixedly mounted on the moving end of each third Z-axis linear module. A clamping fixed frame is vertically mounted on the top of the clamping longitudinal rod. A guide crossbar is movably inserted into the top of the clamping fixed frame. A clamping movable frame is vertically mounted at the end of the guide crossbar. Buffer pads are fixedly mounted on opposite sides of both the clamping movable frame and the clamping fixed frame. An electric telescopic rod is vertically mounted on the top of the clamping fixed frame. The driving end of the electric telescopic rod is fixedly mounted on the clamping movable frame. A positioning block is vertically mounted on the top inner side of the clamping fixed frame. A second telescopic cylinder is provided on the side of the outer fixed slide near the positioning support frame. The second telescopic cylinder is fixedly clamped onto the positioning support frame, and its telescopic end is fixedly mounted on the outer fixed slide.

[0013] A method for using a welding device for a new energy vehicle battery box includes the following steps: Step 1: Assemble the bottom panel and the four side panels of the enclosure; First, adjust the spacing of the T-shaped supports around the box according to the size of the box bottom plate. Then, drive the inner fixed slide to slide horizontally on the guide crossbar by opening the first telescopic cylinder, thereby controlling the T-shaped supports to slide horizontally. Then, place the box bottom plate on the T-shaped supports around the box so that the box bottom plate and the T-shaped supports are in contact and positioned. Then, place the four box side panels one by one between the corresponding clamping moving frame and clamping fixed frame around the four sides, so that the top of the box side panel contacts the positioning block for height positioning. Then, activate the corresponding electric telescopic rod to drive the clamping moving frame to move, and use the clamping moving frame and clamping fixed frame to clamp and position the box side panels around the four sides. Subsequently, by opening the second telescopic cylinder to drive the positioning support frame to move the corresponding side plate, the four side plates are positioned and assembled. Then, by opening multiple third Z-axis linear modules to drive the four side plates to descend vertically, the four side plates and the bottom plate are assembled and connected. Subsequently, the linear electric actuator is activated to control the positioning mechanism to move, moving the assembled bottom plate and side plate of the box to the position of the welding mechanism; Step 2: Weld the four side plates and the bottom plate of the assembly joint; Connect the end of the suction pipe to the suction end of the external suction pump, and connect the ends of the two liquid guiding pipes to the output port and input port of the external coolant circulation system, respectively. Specifically, the laser welding machine is controlled to move along the X-axis by activating the first X-axis linear module, to move along the Y-axis by activating the first Y-axis linear module, and to move along the Z-axis by activating the first Z-axis linear module. Additionally, the laser welding machine is controlled to rotate horizontally by activating the second motor at the first rotating shaft position to drive the transmission worm gear and rotate the transmission worm wheel. This allows for flexible adjustment of the laser welding machine's position and enables automatic laser welding processing of the welding positions on the battery box of new energy vehicles. During laser welding, the welding protrusions at the welding position are ground down. The grinding group is controlled to move along the X-axis by activating the second X-axis linear module, along the Y-axis by activating the second Y-axis linear module, and along the Z-axis by activating the second Z-axis linear module. Additionally, the grinding group is controlled to rotate vertically by activating the second motor at the second rotating shaft position to drive the transmission worm gear and drive the transmission worm wheel. The grinding group is also controlled to rotate horizontally by activating the second motor at the rotating longitudinal tube position to drive the transmission worm gear and drive the transmission worm wheel. This ensures that the cleaning cover always fits against the inner wall of the adjacent position in the welding box, and that the opening structure corresponds to the welding protrusion of the new energy vehicle battery box, forming a flow channel. The first motor is activated to drive the grinding shaft to rotate, thereby controlling the grinding head to rotate and automatically grinding the welded protrusions of the new energy vehicle battery box. At the same time, the coolant circulation system is activated. The coolant is introduced into the liquid tank, outer channel, and cooling chamber through one of the liquid guide pipes, the flow guide hose, the liquid guide hose, and the liquid guide head. It is then introduced into the coolant circulation system through the inner channel, the liquid outlet tank, another liquid guide head, the liquid guide hose, the flow guide hose, and the liquid guide pipe, thereby realizing the circulation of coolant in the cooling chamber and cooling the grinding head to keep it at a suitable grinding temperature. At the same time, the suction pump is turned on to create negative pressure in the cleaning cover, and the waste generated by grinding is sucked up and cleaned in time.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This welding device uses a laser welding machine to automatically laser weld the welding positions of the new energy vehicle battery box by setting up a welding mechanism. It also automatically grinds the weld protrusions in a timely manner by using a grinding part, and automatically cleans the waste generated by grinding to prevent the waste from sticking to the inner wall of the new energy vehicle battery box and causing problems.

[0015] 2. This welding device, by incorporating a grinding component, simultaneously grinds the weld protrusions while circulating coolant in the cooling chamber. This maintains the grinding head at a suitable grinding temperature, aiding in rapid cooling and shaping of the weld, preventing overheating deformation and debris adhesion, while also extending the service life of the grinding head and reducing the suction load of the suction pump to prevent debris blockage.

[0016] 3. This welding device, by setting a positioning mechanism, flexibly adjusts the spacing of the T-shaped supports around the perimeter, adapts to the positioning of box bottom plates of different sizes, positions the side plates around the perimeter, and automatically splices and assembles the bottom plate and side plates without covering the welding parts or affecting the clamping and positioning of box components of different sizes, thereby improving the welding efficiency of the box. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the welding mechanism in this invention.

[0020] Figure 3 This is a schematic diagram of the structure of the welded component in this invention.

[0021] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle.

[0022] Figure 5 This is a schematic diagram of the structure of the grinding component in this invention.

[0023] Figure 6 For the present invention Figure 5 Enlarged view of point B in the middle.

[0024] Figure 7This is a schematic diagram of the grinding assembly in this invention.

[0025] Figure 8 This is a schematic diagram showing the structural connection between the grinding shaft and the grinding head in this invention.

[0026] Figure 9 This is a schematic diagram of the grinding shaft in this invention.

[0027] Figure 10 This is a cross-sectional view of the grinding shaft in this invention.

[0028] Figure 11 This is a schematic diagram of the positioning mechanism in this invention.

[0029] Figure 12 This is a partial structural diagram of the positioning mechanism in this invention.

[0030] Figure 13 This is a schematic diagram of the internal fixing component in this invention.

[0031] Figure 14 This is a schematic diagram of the structure of the outer fixing component in this invention.

[0032] Figure 15 This is a partial structural diagram of the external fixing component in this invention.

[0033] In the diagram: 1. Device base; 11. Linear electric actuator; 2. Welding mechanism; 3. Positioning mechanism; 4. Welded component; 5. Grinding component; 6. Grinding assembly; 7. Inner fixed component; 8. Outer fixed component; 9. Transmission worm gear; 91. Transmission worm; 92. Second motor; 21. Mechanism longitudinal frame; 22. First X-axis linear module; 221. First Y-axis linear module; 23. Second X-axis linear module; 231. Second Y-axis linear module; 41. First Z-axis linear module; 411. First longitudinal frame; 42. First outer cylinder; 43. First rotating shaft; 44. Welding bracket; 45. Laser welding machine; 51. Second Z-axis linear module; 52. Second longitudinal frame; 53. Rotating bottom frame; 531. Second rotating shaft; 54. Rotating side frame; 55. Rotating longitudinal tube; 551. Third sealing rotating component; 552. Suction head; 553. Fixed bracket; 56. L-shaped bracket; 57. Suction tube 571. Suction hose; 58. Liquid guiding pipe; 581. Flow guiding hose; 61. Cleaning cover; 601. Opening structure; 62. Grinding shaft; 621. Cooling chamber; 622. Outer channel; 6221. Liquid inlet tank; 623. Inner channel; 6231. Liquid outlet tank; 63. Grinding head; 64. Liquid guiding cylinder; 641. Liquid guiding head; 642. Liquid guiding hose; 65. Second sealing rotating component; 66. First motor; 31. Mechanism base frame 32. Positioning support frame; 33. Positioning middle frame; 331. Support base frame; 34. Guide crossbar; 71. Inner fixed slide; 72. T-shaped support frame; 73. First telescopic cylinder; 81. Outer fixed slide; 82. Third Z-axis linear module; 83. Clamping longitudinal bar; 831. Clamping fixed frame; 832. Guide horizontal axis; 833. Clamping moving frame; 834. Buffer pad; 835. Electric telescopic rod; 836. Positioning block; 84. Second telescopic cylinder. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Example: Figure 1-15 As shown, the present invention provides a welding device for a new energy vehicle battery box, including a device base 1, a linear electric actuator 11 fixedly installed at the top of the device base 1, a positioning mechanism 3 provided at the moving end of the linear electric actuator 11, and the positioning mechanism 3 is controlled to move horizontally by using the linear electric actuator 11. A welding mechanism 2 is fixedly installed on one side of the top of the device base 1. The welding mechanism 2 includes a longitudinal frame 21, which is fixedly installed on the top of the device base 1. Two first X-axis linear modules 22 and two second X-axis linear modules 23 are fixedly installed on the top of the longitudinal frame 21. A first Y-axis linear module 221 is fixedly installed on the moving end of the two first X-axis linear modules 22, and a second Y-axis linear module 231 is fixedly installed on the moving end of the two second X-axis linear modules 23. A welding component 4 is fixedly installed on the moving end of the first Y-axis linear module 221. The welding component 4 is controlled to move in the X-axis by activating the first X-axis linear module 22, and the welding component 4 is controlled to move in the Y-axis by activating the first Y-axis linear module 221. A grinding component 5 is fixedly installed on the moving end of the second Y-axis linear module 231. The grinding component 5 is controlled to move in the X-axis by activating the second X-axis linear module 23, and the grinding component 5 is controlled to move in the Y-axis by activating the second Y-axis linear module 231.

[0036] The welding component 4 includes a first Z-axis linear module 41, which is fixedly installed at the moving end of the first Y-axis linear module 221. A first longitudinal frame 411 is fixedly installed at the moving end of the first Z-axis linear module 41. A first outer cylinder 42 is vertically installed at the bottom of the first longitudinal frame 411. A first rotating shaft 43 is rotatably installed at the end of the first outer cylinder 42. A welding bracket 44 is fixedly installed at the bottom of the first rotating shaft 43. A laser welding machine 45 is fixedly installed at the bottom of the welding bracket 44. By turning on the first Z-axis linear module 41, the laser welding machine 45 is controlled to move along the Z-axis. The laser welding machine 45 is used to automatically laser weld the welding position of the new energy vehicle battery box.

[0037] The grinding component 5 includes a second Z-axis linear module 51, which is fixedly installed at the moving end of the second Y-axis linear module 231. A second longitudinal frame 52 is fixedly installed at the moving end of the second Z-axis linear module 51. A rotating base frame 53 is fixedly installed at the bottom end of the second longitudinal frame 52. A second rotating shaft 531 is rotatably installed at the bottom of the rotating base frame 53. A rotating side frame 54 is fixedly installed at the end of the second rotating shaft 531. A rotating longitudinal tube 55 is rotatably installed at the end of the rotating side frame 54. A grinding assembly 6 is provided at the bottom of the rotating longitudinal tube 55. The grinding assembly 6 can be moved along the Z-axis by opening the second Z-axis linear module 51.

[0038] The grinding assembly 6 includes a cleaning cover 61. The bottom of the rotating longitudinal tube 55 is fixedly mounted on the top of the cleaning cover 61. One corner of the bottom of the cleaning cover 61 is set as an opening structure 601. By setting the opening structure 601, a flow channel is formed on the one hand, and on the other hand, it corresponds to the welding protrusion of the new energy vehicle battery box, without affecting the welding protrusion and causing obstruction to the cleaning cover 61. A grinding shaft 62 is rotatably mounted on one side of the cleaning cover 61 via a bearing. The grinding shaft 62 is designed with an inclined structure. A grinding head 63 is fixedly mounted on the bottom of the grinding shaft 62. A first motor 66 is fixedly mounted on one side of the cleaning cover 61. The drive end of the first motor 66 is fixedly mounted on the top end of the grinding shaft 62. By turning on the first motor 66, the grinding shaft 62 is driven to rotate, thereby controlling the grinding head 63 to rotate, and automatically grinding the welding protrusions of the new energy vehicle battery box. A cooling chamber 621 is provided at the bottom of the grinding shaft 62. An outer channel 622 is provided on the outside of the grinding shaft 62. An inner channel 623 is provided along the axis in the middle of the grinding shaft 62. The bottom of the outer channel 622 and the inner channel 623 are connected to the cooling chamber 621. A liquid inlet groove 6221 is provided at the top of the outer channel 622. A liquid outlet groove 6231 is provided at the top of the inner channel 623. The liquid inlet groove 6221 and the liquid outlet groove 6231 extend out of the outside of the grinding shaft 62, and are interconnected with the liquid inlet groove 6221, the outer channel 622, the cooling chamber 621, the inner channel 623, and the liquid outlet groove 6231. A liquid guide cylinder 64 is provided on the side of the outer wall of the grinding shaft 62 near the liquid inlet tank 6221 and the liquid outlet tank 6231. A second sealing rotating component 65 is fixedly installed between the inner wall of the liquid guide cylinder 64 and the outer wall of the grinding shaft 62. A liquid guide head 641 is fixedly installed in the middle of the liquid guide cylinder 64. A liquid guide hose 642 is fixedly installed at the end of the liquid guide head 641. The liquid guide hose 642 is fixedly clipped on the cleaning cover 61. One end of the liquid guide hose 642 extends out of the outer side of the cleaning cover 61 and moves through the rotating side frame 54. The liquid guide hose 642 is fixed on the cleaning cover 61 and can move in the rotating side frame 54.

[0039] A third sealing rotating component 551 is fixedly installed on the top of the rotating longitudinal tube 55, a suction head 552 is fixedly installed in the middle of the third sealing rotating component 551, a fixed bracket 553 is fixedly installed on the outside of the suction head 552, and the fixed bracket 553 is fixedly installed on the top of the rotating side frame 54. An L-shaped bracket 56 is fixedly installed on the side end of the second longitudinal frame 52. A suction pipe 57 is fixedly installed on the outer end of the L-shaped bracket 56. The end of the suction pipe 57 is connected to the suction end of the external suction pump. A suction hose 571 is fixedly installed on the bottom end of the suction pipe 57 and the top end of the suction head 552. By turning on the suction pump, a negative pressure is formed in the cleaning cover 61 to promptly suck up and clean the waste generated by grinding, preventing the waste from sticking to the inner wall of the new energy vehicle battery box and causing an impact. The suction hose 571 does not affect the rotation of the grinding group 6. The L-shaped bracket 56 is fixedly equipped with a liquid guiding pipe 58 corresponding to the liquid guiding hose 642. The ends of the two liquid guiding pipes 58 are connected to the output port and input port of the external coolant circulation system, respectively. The bottom end of the liquid guiding pipe 58 and the top end of the corresponding liquid guiding hose 642 are both fixedly equipped with a flow guiding hose 581. When the coolant circulation system is turned on, the coolant is introduced into the liquid tank 6221, the outer channel 622, and the cooling chamber 621 through one of the liquid guiding pipes 58, the flow guiding hose 581, the liquid guiding hose 642, and the liquid guiding head 641, and then through the inner channel 642. 23. The liquid outlet 6231, another liquid guide head 641, liquid guide hose 642, flow guide hose 581 and liquid guide pipe 58 are introduced into the coolant circulation system to realize the circulation of coolant in the cooling chamber 621, thereby cooling the grinding head 63 and keeping the grinding head 63 at a suitable grinding temperature. This helps the weld to cool and solidify quickly, avoids overheating deformation and waste chip adhesion, and also improves the service life of the grinding head 63. It also reduces the suction load of the suction pump and reduces waste chip blockage. By setting the flow guide hose 581, the rotation of the grinding assembly 6 is not affected.

[0040] A transmission worm gear 9 is fixedly installed on the outer side of the first rotating shaft 43, the second rotating shaft 531, and the rotating longitudinal tube 55. A transmission worm 91 is meshed with the outer side of each transmission worm gear 9. The transmission worm 91 is rotatably installed in the corresponding first outer cylinder 42, rotating bottom frame 53, and rotating side frame 54. A second motor 92 is fixedly installed in each of the first outer cylinder 42, rotating bottom frame 53, and rotating side frame 54. The drive end of the second motor 92 is fixedly installed with the shaft end of the corresponding transmission worm 91. By turning on the corresponding second motor 92, the transmission worm 91 is driven to rotate, thereby controlling the rotation of the corresponding first rotating shaft 43, second rotating shaft 531, and rotating longitudinal tube 55.

[0041] The positioning mechanism 3 includes a base frame 31, which is fixedly installed on the moving end of the linear electric actuator 11. A positioning support frame 32 is fixedly installed on the top of the base frame 31. A positioning middle frame 33 is provided in the middle of the positioning support frame 32. A support base frame 331 is fixedly installed in the positioning middle frame 33. Guide crossbars 34 are vertically installed around the positioning support frame 32 and the positioning middle frame 33. An inner fixing member 7 is provided on the side of the guide crossbar 34 near the positioning middle frame 33, and an outer fixing member 8 is provided on the side of the guide crossbar 34 near the positioning support frame 32.

[0042] The inner fixing component 7 includes an inner fixing slide 71, which is slidably mounted on the guide crossbar 34. Multiple T-shaped supports 72 are fixedly mounted on the top of the inner fixing slide 71. A first telescopic cylinder 73 is provided on the side of the inner fixing slide 71 near the positioning frame 33. The first telescopic cylinder 73 is fixedly clamped on the positioning frame 33, and the telescopic end of the first telescopic cylinder 73 is fixedly mounted on the inner fixing slide 71. By opening the first telescopic cylinder 73, the inner fixing slide 71 is driven to slide horizontally on the guide crossbar 34, thereby controlling the T-shaped supports 72 to slide horizontally. By sliding and adjusting the inner fixing components 7 around the perimeter, the spacing of the T-shaped supports 72 around the perimeter can be flexibly adjusted to adapt to the positioning of the bottom plate of the box of different sizes.

[0043] The outer fixed component 8 includes an outer fixed slide 81, which is slidably mounted on a guide crossbar 34. Multiple third Z-axis linear modules 82 are vertically mounted on the top of the outer fixed slide 81. A clamping longitudinal rod 83 is fixedly mounted on the moving end of each third Z-axis linear module 82. A clamping fixed frame 831 is vertically mounted on the top of the clamping longitudinal rod 83. A guide crossbar 832 is movably inserted into the top of the clamping fixed frame 831. A clamping movable frame 833 is vertically mounted on the end of the guide crossbar 832. Buffer pads 834 are fixedly mounted on opposite sides of both the clamping movable frame 833 and the clamping fixed frame 831. An electric telescopic rod 835 is vertically installed on the top of the clamping fixed frame 831. The drive end of the electric telescopic rod 835 is fixedly installed on the clamping movable frame 833. A positioning block 836 is vertically installed on the top inner side of the clamping fixed frame 831. The box side panels are placed one by one between the corresponding clamping movable frames 833 and clamping fixed frames 831 around the box, so that the top of the box side panel contacts the positioning block 836 for height positioning. Then, the corresponding electric telescopic rod 835 is activated to drive the clamping movable frame 833 to move. The clamping movable frame 833 and clamping fixed frame 831 are used to clamp and position the box side panels around the box. A second telescopic cylinder 84 is provided on the side of the outer fixed slide 81 near the positioning support frame 32. The second telescopic cylinder 84 is fixedly clamped on the positioning support frame 32, and the telescopic end of the second telescopic cylinder 84 is fixedly installed on the outer fixed slide 81. By opening the second telescopic cylinder 84, the positioning support frame 32 is driven to move the corresponding side plate, so that the four side plates are positioned and assembled. By opening multiple third Z-axis linear modules 82, the four side plates are driven to descend vertically, so that the four side plates and the bottom plate are assembled and connected.

[0044] A method for using a welding device for a new energy vehicle battery box includes the following steps: Step 1: Assemble the bottom panel and the four side panels of the enclosure; First, adjust the spacing of the T-shaped supports 72 around the box according to the size of the box bottom plate. Then, drive the inner fixed slide 71 to slide horizontally on the guide crossbar 34 by opening the first telescopic cylinder 73, thereby controlling the T-shaped supports 72 to slide horizontally. Then, place the box bottom plate on the T-shaped supports 72 around the box so that the box bottom plate and the T-shaped supports 72 are in contact and positioned. Subsequently, the four box side panels are placed one by one between the corresponding clamping moving frame 833 and clamping fixed frame 831 around the four sides, so that the top of the box side panel contacts the positioning block 836 for height positioning. Then, the corresponding electric telescopic rod 835 is activated to drive the clamping moving frame 833 to move, and the clamping moving frame 833 and clamping fixed frame 831 are used to clamp and position the box side panels around the four sides. Subsequently, by opening the second telescopic cylinder 84 to drive the positioning support frame 32 to move the corresponding side plate, the four side plates are positioned and assembled. Then, by opening multiple third Z-axis linear modules 82 to drive the four side plates to descend vertically, the four side plates and the bottom plate are assembled and connected. Subsequently, the linear electric actuator 11 is activated to control the positioning mechanism 3 to move, moving the assembled bottom plate and side plate of the box to the position of the welding mechanism 2. Step 2: Weld the four side plates and the bottom plate of the assembly joint; Connect the end of the suction pipe 57 to the suction end of the external suction pump, and connect the ends of the two liquid guiding pipes 58 to the output port and input port of the external coolant circulation system, respectively. Specifically, the laser welding machine 45 is controlled to move along the X-axis by activating the first X-axis linear module 22, to move along the Y-axis by activating the first Y-axis linear module 221, to move along the Z-axis by activating the first Z-axis linear module 41, and to rotate by activating the second motor 92 at the first rotating shaft 43 to drive the transmission worm gear 91 to rotate, thereby controlling the laser welding machine 45 to rotate horizontally, flexibly adjusting the position of the laser welding machine 45, and using the laser welding machine 45 to perform automatic laser welding processing on the welding position of the new energy vehicle battery box; During laser welding, the welding protrusions at the welding position are ground down. The grinding group 6 is controlled to move along the X-axis by activating the second X-axis linear module 23, along the Y-axis by activating the second Y-axis linear module 231, and along the Z-axis by activating the second Z-axis linear module 51. Additionally, the grinding group 6 is controlled to rotate vertically by activating the second motor 92 at the second rotating shaft 531, which drives the transmission worm gear 91 to rotate the transmission worm wheel 9. The grinding group 6 is also controlled to rotate horizontally by activating the second motor 92 at the rotating longitudinal tube 55, which drives the transmission worm gear 91 to rotate the transmission worm wheel 9. This ensures that the cleaning cover 61 always fits against the inner wall of the adjacent position in the welding box, and that the opening structure 601 corresponds to the welding protrusion of the new energy vehicle battery box, forming a flow channel. The first motor 66 is turned on to drive the grinding shaft 62 to rotate, thereby controlling the grinding head 63 to rotate and automatically grind the welding protrusions of the new energy vehicle battery box. At the same time, the coolant circulation system is activated. The coolant is introduced into the liquid tank 6221, the outer channel 622, and the cooling chamber 621 through one of the liquid guide pipes 58, the flow guide hose 581, the liquid guide hose 642, and the liquid guide head 641. It is then introduced into the coolant circulation system through the inner channel 623, the liquid outlet tank 6231, the other liquid guide head 641, the liquid guide hose 642, the flow guide hose 581, and the liquid guide pipe 58, thereby circulating the coolant in the cooling chamber 621 to cool the grinding head 63 and keep it at a suitable grinding temperature. At the same time, the suction pump is turned on to create negative pressure in the cleaning cover 61, and the waste generated by grinding is sucked up and cleaned in time.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A welding device for a battery box of a new energy vehicle, comprising a device base (1), characterized in that: A linear electric actuator (11) is fixedly installed at the top of the device base (1), and a positioning mechanism (3) is provided at the moving end of the linear electric actuator (11). A welding mechanism (2) is fixedly installed on one side of the top of the device base (1). The welding mechanism (2) includes a longitudinal frame (21), which is fixedly installed on the top of the device base (1). Two first X-axis linear modules (22) and two second X-axis linear modules (23) are fixedly installed on the top of the longitudinal frame (21). A first Y-axis linear module (221) is fixedly installed on the moving end of the two first X-axis linear modules (22), and a second Y-axis linear module (231) is fixedly installed on the moving end of the two second X-axis linear modules (23). A welding component (4) is fixedly installed on the moving end of the first Y-axis linear module (221), and a grinding component (5) is fixedly installed on the moving end of the second Y-axis linear module (231).

2. The welding device for a new energy vehicle battery box according to claim 1, characterized in that: The welded component (4) includes a first Z-axis linear module (41), which is fixedly installed on the moving end of the first Y-axis linear module (221). A first longitudinal frame (411) is fixedly installed on the moving end of the first Z-axis linear module (41). A first outer cylinder (42) is vertically installed at the bottom of the first longitudinal frame (411). A first rotating shaft (43) is rotatably installed at the end of the first outer cylinder (42). A welding bracket (44) is fixedly installed at the bottom of the first rotating shaft (43). A laser welding machine (45) is fixedly installed at the bottom of the welding bracket (44).

3. The welding device for a new energy vehicle battery box according to claim 2, characterized in that: The grinding component (5) includes a second Z-axis linear module (51), which is fixedly installed on the moving end of the second Y-axis linear module (231). A second longitudinal frame (52) is fixedly installed on the moving end of the second Z-axis linear module (51). A rotating bottom frame (53) is fixedly installed at the bottom of the second longitudinal frame (52). A second rotating shaft (531) is rotatably installed at the bottom of the rotating bottom frame (53). A rotating side frame (54) is fixedly installed at the end of the second rotating shaft (531). A rotating longitudinal tube (55) is rotatably installed at the end of the rotating side frame (54). A grinding assembly (6) is provided at the bottom of the rotating longitudinal tube (55).

4. The welding device for a new energy vehicle battery box according to claim 3, characterized in that: The grinding assembly (6) includes a cleaning cover (61). The bottom of the rotating longitudinal tube (55) is fixedly mounted on the top of the cleaning cover (61). One corner of the bottom of the cleaning cover (61) is set as an open structure (601). A grinding shaft (62) is rotatably mounted on one side of the cleaning cover (61) via a bearing. The grinding shaft (62) is set as an inclined structure. A grinding head (63) is fixedly mounted on the bottom of the grinding shaft (62). A cooling chamber (621) is opened at the bottom of the grinding shaft (62). An outer channel (622) is opened on the outside of the grinding shaft (62). An inner channel (623) is opened along the axis in the middle of the grinding shaft (62). The bottoms of the outer channel (622) and the inner channel (623) are connected to the cooling chamber (621). A liquid inlet groove (6221) is opened at the top of the outer channel (622). A liquid outlet groove (623) is opened at the top of the inner channel (623). 1) The liquid inlet tank (6221) and liquid outlet tank (6231) extend outward from the outside of the grinding shaft (62). The outer wall of the grinding shaft (62) is provided with a liquid guide tube (64) on the side close to the liquid inlet tank (6221) and the liquid outlet tank (6231). A second sealing rotating component (65) is fixedly installed between the inner wall of the liquid guide tube (64) and the outer wall of the grinding shaft (62). A liquid guide head (641) is fixedly installed in the middle of the liquid guide tube (64). Each end of the liquid guide head (641) is fixedly installed with a liquid guide hose (642). The liquid guide hose (642) is fixedly clipped onto the cleaning cover (61). One end of the liquid guide hose (642) extends out of the outside of the cleaning cover (61) and moves through the rotating side frame (54). A first motor (66) is fixedly installed on one side of the cleaning cover (61). The drive end of the first motor (66) and the top end of the grinding shaft (62) are fixedly installed.

5. The welding device for a new energy vehicle battery box according to claim 4, characterized in that: A third sealing rotating component (551) is fixedly installed on the top of the rotating longitudinal tube (55). A suction head (552) is fixedly installed in the middle of the third sealing rotating component (551). A fixed bracket (553) is fixedly installed on the outside of the suction head (552). The fixed bracket (553) is fixedly installed on the top of the rotating side frame (54). An L-shaped bracket (56) is fixedly installed on the side end of the second longitudinal frame (52). A suction pipe (57) is fixedly installed on the outer end of the L-shaped bracket (56). A suction hose (571) is fixedly installed on the bottom end of the suction pipe (57) and the top end of the suction head (552). A liquid guiding pipe (58) corresponding to the liquid guiding hose (642) is fixedly installed on the L-shaped bracket (56). A flow guiding hose (581) is fixedly installed on the bottom end of the liquid guiding pipe (58) and the top end of the corresponding liquid guiding hose (642).

6. The welding device for a new energy vehicle battery box according to claim 5, characterized in that: A transmission worm gear (9) is fixedly installed on the outer side of the first rotating shaft (43), the second rotating shaft (531), and the rotating longitudinal tube (55). A transmission worm (91) is meshed with the outer side of the transmission worm gear (9). The transmission worm (91) is rotatably installed in the corresponding first outer cylinder (42), rotating bottom frame (53), and rotating side frame (54). A second motor (92) is fixedly installed in the first outer cylinder (42), rotating bottom frame (53), and rotating side frame (54). The drive end of the second motor (92) and the shaft end of the corresponding transmission worm (91) are fixedly installed.

7. The welding device for a new energy vehicle battery box according to claim 6, characterized in that: The positioning mechanism (3) includes a mechanism base frame (31), which is fixedly installed on the moving end of the linear electric actuator (11). A positioning support frame (32) is fixedly installed at the top of the mechanism base frame (31). A positioning middle frame (33) is provided in the middle of the positioning support frame (32). A support base frame (331) is fixedly installed in the positioning middle frame (33). Guide crossbars (34) are vertically installed around the positioning support frame (32) and the positioning middle frame (33). An inner fixing part (7) is provided on the side of the guide crossbar (34) near the positioning middle frame (33), and an outer fixing part (8) is provided on the side of the guide crossbar (34) near the positioning support frame (32).

8. The welding device for a new energy vehicle battery box according to claim 7, characterized in that: The inner fixing component (7) includes an inner fixing slide (71), which is slidably mounted on the guide crossbar (34). Multiple T-shaped supports (72) are fixedly mounted on the top of the inner fixing slide (71). A first telescopic cylinder (73) is provided on the side of the inner fixing slide (71) near the positioning frame (33). The first telescopic cylinder (73) is fixedly mounted on the positioning frame (33), and the telescopic end of the first telescopic cylinder (73) is fixedly mounted on the inner fixing slide (71).

9. The welding device for a new energy vehicle battery box according to claim 8, characterized in that: The outer fixed component (8) includes an outer fixed slide (81), which is slidably mounted on a guide crossbar (34). Multiple third Z-axis linear modules (82) are vertically mounted on the top of the outer fixed slide (81). A clamping longitudinal rod (83) is fixedly mounted on the moving end of each third Z-axis linear module (82). A clamping fixed frame (831) is vertically mounted on the top of the clamping longitudinal rod (83). A guide crossbar (832) is movably inserted into the top of the clamping fixed frame (831). A clamping movable frame (833) is vertically mounted on the end of the guide crossbar (832). The clamping movable frame (833) and the clamping... A buffer pad (834) is fixedly installed on each side of the fixed frame (831). An electric telescopic rod (835) is vertically installed on the top of the clamping fixed frame (831). The driving end of the electric telescopic rod (835) is fixedly installed on the clamping moving frame (833). A positioning block (836) is vertically installed on the top of the inner side of the clamping fixed frame (831). A second telescopic cylinder (84) is provided on the side of the outer fixed slide (81) near the positioning support frame (32). The second telescopic cylinder (84) is fixedly clamped on the positioning support frame (32). The telescopic end of the second telescopic cylinder (84) is fixedly installed on the outer fixed slide (81).

10. A method of using the welding device for a new energy vehicle battery box as described in claim 9, characterized in that, Includes the following steps: Step 1: Assemble the bottom panel and the four side panels of the enclosure; First, adjust the spacing of the T-shaped supports (72) around the box according to the size of the box bottom plate. Drive the inner fixed slide (71) to slide on the guide crossbar (34) by opening the first telescopic cylinder (73), thereby controlling the T-shaped supports (72) to slide. Then, place the box bottom plate on the T-shaped supports (72) around the box so that the box bottom plate and the T-shaped supports (72) are in contact and positioned. Subsequently, the four box side panels are placed one by one between the corresponding clamping moving frame (833) and clamping fixed frame (831) around the perimeter, so that the top of the box side panel contacts the positioning block (836) for height positioning. Then, the corresponding electric telescopic rod (835) is activated to drive the clamping moving frame (833) to move, and the clamping moving frame (833) and clamping fixed frame (831) are used to clamp and position the box side panels around the perimeter. Subsequently, by opening the second telescopic cylinder (84), the positioning support frame (32) is driven to move the corresponding side plate, so that the four side plates are positioned and assembled. By opening multiple third Z-axis linear modules (82), the four side plates are driven to descend vertically, so that the four side plates and the bottom plate are assembled and connected. Subsequently, the linear electric actuator (11) is activated to control the positioning mechanism (3) to move, and the assembled bottom plate and side plate of the box are moved to the position of the welding mechanism (2). Step 2: Weld the four side plates and the bottom plate of the assembly joint; Connect the end of the suction pipe (57) to the suction end of the external suction pump, and connect the ends of the two liquid guiding pipes (58) to the output port and input port of the external coolant circulation system, respectively. The laser welding machine (45) is controlled to move along the X-axis by activating the first X-axis linear module (22), the laser welding machine (45) is controlled to move along the Y-axis by activating the first Y-axis linear module (221), the laser welding machine (45) is controlled to move along the Z-axis by activating the first Z-axis linear module (41), and the laser welding machine (45) is controlled to move along the Z-axis by activating the second motor (92) at the position of the first rotating shaft (43) to drive the transmission worm (91) to rotate the transmission worm wheel (9), thereby controlling the laser welding machine (45) to rotate horizontally, flexibly adjusting the position of the laser welding machine (45), and using the laser welding machine (45) to perform automatic laser welding processing on the welding position of the new energy vehicle battery box. During laser welding, the welding protrusions at the welding position are ground down. By activating the second X-axis linear module (23), the grinding group (6) is controlled to move along the X-axis. By activating the second Y-axis linear module (231), the grinding group (6) is controlled to move along the Y-axis. By activating the second Z-axis linear module (51), the grinding group (6) is controlled to move along the Z-axis. The second motor (92) at the position of the second rotating shaft (531) drives the transmission worm (91) to rotate the transmission worm wheel (9), thereby controlling the grinding group (6) to rotate vertically. The second motor (92) at the position of the rotating longitudinal tube (55) drives the transmission worm (91) to rotate the transmission worm wheel (9), thereby controlling the grinding group (6) to rotate horizontally. This ensures that the cleaning cover (61) always fits against the inner wall of the adjacent position in the welding box, and that the opening structure (601) corresponds to the welding protrusion of the new energy vehicle battery box to form a guide channel. The first motor (66) is turned on to drive the grinding shaft (62) to rotate, thereby controlling the grinding head (63) to rotate and automatically grinding the welding protrusions of the new energy vehicle battery box. At the same time, the coolant circulation system is turned on. The coolant is introduced into the liquid tank (6221), outer channel (622), and cooling chamber (621) through one of the liquid guide pipes (58), the flow guide hose (581), the liquid guide hose (642), and the liquid guide head (641). It is then introduced into the coolant circulation system through the inner channel (623), the liquid outlet tank (6231), the other liquid guide head (641), the liquid guide hose (642), the flow guide hose (581), and the liquid guide pipe (58), so as to realize the circulation of coolant in the cooling chamber (621) and thereby cool the grinding head (63) and keep the grinding head (63) at a suitable grinding temperature. At the same time, the suction pump is turned on to form a negative pressure in the cleaning cover (61) to promptly suck up and clean the waste generated by grinding.

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