Combined processing device for longitudinal beam of new energy vehicle

Abstract

The present application relates to metal composite processing device technical field, specifically, a kind of new energy automobile longitudinal beam's combined processing device.It includes a pair of interval setting in the top of processing table mobile assembly, the mobile assembly includes fixed part and mobile part, the top of two mobile parts is equipped with the longitudinal beam body and crossbeam body to be welded, the longitudinal beam body and crossbeam body cross fixed;Two mobile parts are equipped with cooling cleaning assembly in the side far away from each other, and the top of longitudinal beam body and crossbeam body to be welded is equipped with welding polishing assembly;After longitudinal beam body and crossbeam body to be welded are placed in the top of slider, the piston rod of hydraulic rod is stretched out from cylinder body, drives lifting mounting plate to descend, then by welder longitudinal beam body and crossbeam body joint are welded together, after soldering material cools and solidifies, polishing head rotates and makes longitudinal beam body and crossbeam body inside soldering projection flat.

Description

Technical Field

[0001] This invention relates to the field of metal composite processing equipment technology, and more specifically, to a combined processing equipment for longitudinal beams of new energy vehicles. Background Technology

[0002] The battery pack frame for new energy vehicles is formed by cross-welding longitudinal and transverse beams, serving as the core load-bearing structure that supports and protects the power battery module. Currently, the industry's processing method often employs separate, independent equipment to complete the welding and grinding processes: first, specialized welding fixtures are used to position and weld the longitudinal and transverse beams; after welding, the workpiece is manually transferred to a separate grinding machine, re-clamped and positioned, and then the inner protrusions of the weld are ground and smoothed. Conveying and positioning rely on independent conveyor belts and simple sliders to support the workpiece; the welding and grinding stations are independent of each other, resulting in low processing efficiency. Weld cooling and slag removal rely on external independent air guns. The entire production line equipment is fragmented and has low automation integration, representing the current mainstream configuration for battery pack frame processing.

[0003] After the workpiece is welded, it needs to be unloaded, transported, and clamped again. The positioning references cannot be unified in the two cases, and the grinding head trajectory is difficult to align precisely with the weld. This can easily result in local weld protrusions and grinding residue. These residual protrusions will significantly reduce the fit between the battery module and the inner plane of the frame, cause the heat sink gap to exceed the standard, and result in uneven stress on the module under vehicle vibration, posing safety hazards such as cell compression and thermal runaway. If the grinding cutting amount is increased to compensate for the positioning error, it will result in the beam base material being too thin, the strength of the cross joint will decrease, and the weld will be prone to fatigue cracking under bottoming and bumpy conditions.

[0004] In addition, existing welding torches and grinding heads lack synchronous lifting and avoidance mechanisms. When encountering protruding parts of the crossbeam, they cannot automatically lift and avoid them, and can only stop the machine to adjust the height, making it impossible to achieve continuous and uniform material feeding and processing of workpieces. At the same time, the supporting cooling and slag removal air sources are mostly external independent fans, which require separate configuration of drive air sources. The equipment has many parts and occupies a large space.

[0005] In view of this, we propose a combined processing device for the longitudinal beams of new energy vehicles to improve the shortcomings of existing technologies. Summary of the Invention

[0006] This invention provides a combined processing device for longitudinal beams of new energy vehicles, which solves the problems of existing split welding and grinding equipment that require secondary clamping and positioning, which easily leads to uneven grinding of welds and causes safety hazards in module assembly, and the lack of a synchronous lifting and avoidance mechanism that prevents continuous processing, and the independent cooling and slag removal air source that results in low equipment integration and poor efficiency.

[0007] To achieve the above objectives, the combined processing device for the longitudinal beam of the new energy vehicle includes a pair of movable components spaced apart on the top of the processing table. Each movable component includes a fixed part and a movable part. The top of the two movable parts is provided with a longitudinal beam body and a cross beam body to be welded. The longitudinal beam body and the cross beam body are fixed in a cross shape.

[0008] Both of the moving parts are provided with cooling and cleaning components on opposite sides. A welding and grinding component is provided above the longitudinal beam body and the transverse beam body to be welded. The welding and grinding component includes a welding unit and a grinding unit, with the welding unit located upstream of the grinding unit.

[0009] When the moving part moves the longitudinal beam body and the cross beam body to be welded, the cooling and cleaning component is used to blow air onto the weld seam of the longitudinal beam body and the cross beam body to accelerate the cooling of the weld seam and clean the weld slag after grinding.

[0010] In the above technical solution, the longitudinal beam body and the cross beam body to be welded are first spot welded for preliminary fixation. Then, the moving part of the moving component is activated to drive the longitudinal beam body and the cross beam body to be welded to move. During the movement, since the welding unit is located upstream of the grinding unit, the longitudinal beam body and the cross beam body to be welded will be welded and fixed together by the welding unit first. Then, the gas blown out by the cooling and cleaning component accelerates the cooling and shaping of the molten solder between the longitudinal beam body and the cross beam body.

[0011] After the longitudinal beam body and the cross beam body are welded together, solder protrusions will inevitably remain on the inner side of the joint. After the battery pack module is filled into the protective shell obtained by welding the longitudinal beam body and the cross beam body, the presence of the above-mentioned protrusions will affect the fit between the battery pack module and the side wall of the longitudinal beam body and the cross beam body, thus making the protective shell unable to effectively protect the battery pack module.

[0012] At this time, the grinding unit passes through the weld seam between the longitudinal beam body and the transverse beam body and grinds away the protruding solder on the inner side of the protective shell. During this process, the gas blown out by the cooling and cleaning component can also blow away the welding slag generated by the grinding on the inner side of the protective shell, so as to prevent the battery pack module from being unable to fit and be fixed to the bottom of the protective shell due to the presence of the welding slag after it is installed in the protective shell.

[0013] Based on this, the fixed part includes a guide rail fixedly connected to the top of the processing table, and the moving part includes a pair of sliders, wherein the pair of sliders includes at least two sliders.

[0014] Furthermore, at least four sliders are used to fix the longitudinal beam body and the transverse beam body to be welded. Each slider is slidably connected to the guide rail, and a rack is fixedly connected between two adjacent sliders located on the top of the same guide rail.

[0015] Furthermore, a drive gear is provided on one side of the rack, and the top of the drive gear is rotatably connected to the processing table. The teeth of the drive gear mesh with the teeth of the rack, and a first motor for driving the drive gear to rotate is provided on the top of the processing table.

[0016] With this design, after the longitudinal beam body and the cross beam body to be welded are placed on the top of the slider, the power supply of the first motor is turned on. The first motor drives the drive gear connected to it on the same axis to rotate through its output shaft. Under the driving action of the drive gear, the rotational driving force of the first motor is converted into the linear driving force of the rack, so that the longitudinal beam body and the cross beam body to be welded on the top of the slider move on the top of the guide rail. After the welding unit welds the longitudinal beam body and the cross beam body together, the grinding unit grinds the weld protrusion at the weld seam flat.

[0017] In another technical solution, a raised mounting frame is fixedly installed on the top of the processing table, a fixed mounting plate is fixedly connected to the top of the raised mounting frame, and lifting mounting plates are spaced apart below the fixed mounting plate. The vertical distance between the lifting mounting plates and the fixed mounting plates is adjustable.

[0018] Based on the above, a number of guide rods are fixedly connected to the top of the lifting mounting plate. The guide rods are slidably connected to the fixed mounting plate in the vertical direction. The top of the fixed mounting plate is provided with a hydraulic rod for driving the lifting mounting plate to rise and fall.

[0019] Furthermore, the hydraulic rod includes a cylinder body and a piston rod, the cylinder body being fixedly connected to a fixed mounting plate, and the piston rod being fixedly connected to a lifting mounting plate.

[0020] The welding unit includes a welding gun fixedly mounted on the lifting mounting plate, and the grinding unit includes a grinding head rotatably connected to the lifting mounting plate. A second motor is provided on the top of the lifting mounting plate, and the output shaft of the second motor is coaxially connected to the grinding head.

[0021] In this technical solution, after the longitudinal beam and crossbeam to be welded are placed on top of the slider, the piston rod of the hydraulic rod extends from the cylinder, driving the lifting mounting plate to descend. Then, the welding torch welds the joint between the longitudinal beam and crossbeam together. After the weld has cooled and solidified, the power to the second motor is turned on, causing it to drive the grinding head to rotate, thereby grinding down the weld protrusions on the inner side of the longitudinal beam and crossbeam. As the slider moves the longitudinal beam and crossbeam on the top of the guide rail, when the welding torch and grinding head encounter an obstacle on the crossbeam, the piston rod of the hydraulic rod retracts into the cylinder, thereby driving the lifting mounting plate to rise. This allows the welding torch and grinding head to skip over the top of the crossbeam they encounter before descending again to grind down the subsequent weld joint between the longitudinal beam and crossbeam.

[0022] Based on the above description, the beneficial effects of the present invention compared with the prior art are as follows:

[0023] After the longitudinal beam body and the cross beam body to be welded are placed on the top of the slider, the piston rod of the hydraulic rod extends out of the cylinder body, driving the lifting mounting plate to descend. Then, the welding gun welds the joint of the longitudinal beam body and the cross beam body together. After the welding material cools and solidifies, the grinding head rotates to grind the welding material protrusions on the inner side of the longitudinal beam body and the cross beam body flat.

[0024] During the process of the slider moving the longitudinal beam body and the cross beam body on the top of the guide rail, when the welding gun and the grinding head encounter the obstruction of the cross beam body, the piston rod of the hydraulic rod retracts into the cylinder, thereby driving the lifting mounting plate to rise, so that the welding gun and the grinding head can jump over the top of the cross beam body they encounter, and then drive the welding gun and the grinding head to descend, thereby grinding the weld seam of the subsequent longitudinal beam body and the cross beam body smooth. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0026] Figure 1 This is a perspective view of the overall structure of the present invention;

[0027] Figure 2 This is a partial cross-sectional schematic diagram of the present invention;

[0028] Figure 3 This is a top view schematic diagram of a partial structure in this invention;

[0029] Figure 4 This is a three-dimensional schematic diagram of the moving component in this invention;

[0030] Figure 5 This is a side view schematic diagram of the moving component in this invention;

[0031] Figure 6 This is a cross-sectional perspective view of the welding and grinding assembly in this invention;

[0032] Figure 7 This is a side view schematic diagram of the welding and grinding assembly in this invention;

[0033] Figure 8 This is a side view schematic diagram of the cooling and cleaning component in this invention;

[0034] Figure 9 This is a three-dimensional schematic diagram of the cooling and cleaning component in this invention.

[0035] The meanings of the labels in the diagram are as follows:

[0036] 100. Processing table; 101. Longitudinal beam body; 102. Crossbeam body; 110. Elevated mounting frame;

[0037] 200. Moving component; 210. Guide rail; 220. Slider; 230. Rack; 231. Drive gear; 232. First motor;

[0038] 300. Welding and grinding assembly; 301. Fixed mounting plate; 302. Lifting mounting plate; 310. Hydraulic rod; 320. Welding torch; 330. Grinding head; 331. Second motor;

[0039] 400 Cooling and cleaning assembly; 410 Tie rod; 411 Sealing plate; 420 Cylinder; 421 Air outlet pipe; 430 Air blowing pipe. Detailed Implementation

[0040] The technical solutions in 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.

[0041] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0043] After the workpiece is welded, it needs to be unloaded, transported, and clamped again. The positioning references cannot be unified in the two cases, and the grinding head trajectory is difficult to align precisely with the weld. This can easily result in local weld protrusions and grinding residue. These residual protrusions will significantly reduce the fit between the battery module and the inner plane of the frame, cause the heat sink gap to exceed the standard, and result in uneven stress on the module under vehicle vibration, posing safety hazards such as cell compression and thermal runaway. If the grinding cutting amount is increased to compensate for the positioning error, it will result in the beam base material being too thin, the strength of the cross joint will decrease, and the weld will be prone to fatigue cracking under bottoming and bumpy conditions.

[0044] In addition, existing welding torches and grinding heads lack synchronous lifting and avoidance mechanisms. When encountering protruding parts of the crossbeam, they cannot automatically lift and avoid them, and can only stop the machine to adjust the height, making it impossible to achieve continuous and uniform material feeding and processing of workpieces. At the same time, the supporting cooling and slag removal air sources are mostly external independent fans, which require separate configuration of drive air sources. The equipment has many parts and occupies a large space.

[0045] Please see Figure 1 - Figure 3 To solve the above problems, the present invention aims to provide a combined processing device for longitudinal beams of new energy vehicles. The combined processing device includes a pair of movable components 200 spaced apart on the top of the processing table 100. The movable components 200 include a fixed part and a movable part. The top of the two movable parts is provided with a longitudinal beam body 101 and a cross beam body 102 to be welded. The longitudinal beam body 101 and the cross beam body 102 are fixed in a cross shape.

[0046] Both moving parts are provided with cooling and cleaning components 400 on opposite sides. A welding and grinding component 300 is provided above the longitudinal beam body 101 and the transverse beam body 102 to be welded. The welding and grinding component 300 includes a welding unit and a grinding unit, with the welding unit located upstream of the grinding unit.

[0047] When the moving part moves the longitudinal beam body 101 and the cross beam body 102 to be welded, the cooling and cleaning component 400 blows air onto the weld joint of the longitudinal beam body 101 and the cross beam body 102 to accelerate the cooling of the weld joint and clean the weld slag after grinding.

[0048] When processing the longitudinal beam, the longitudinal beam body 101 and the cross beam body 102 to be welded are first spot welded for initial fixation. Then, the moving part of the moving component 200 is activated to move the longitudinal beam body 101 and the cross beam body 102 to be welded. During its movement, since the welding unit is located upstream of the grinding unit, the longitudinal beam body 101 and the cross beam body 102 to be welded will be welded and fixed together by the welding unit first. Then, the gas blown out by the cooling and cleaning component 400 accelerates the cooling and shaping of the molten solder between the longitudinal beam body 101 and the cross beam body 102.

[0049] After the longitudinal beam body 101 and the transverse beam body 102 are welded, solder protrusions will inevitably remain on the inner side of the joint between the two. Subsequently, after the battery pack module is assembled and filled into the protective shell obtained by welding the longitudinal beam body 101 and the transverse beam body 102, the presence of the above-mentioned protrusions will affect the fit between the battery pack module and the side wall of the longitudinal beam body 101 and the transverse beam body 102, so that the protective shell cannot effectively protect the battery pack module.

[0050] At this time, the grinding unit passes through the weld between the longitudinal beam body 101 and the transverse beam body 102 and grinds away the protruding solder on the inner side of the protective shell. During this process, the gas blown out by the cooling and cleaning component 400 can also blow away the welding slag generated by the grinding on the inner side of the protective shell, so as to prevent the battery pack module from being unable to fit and be fixed to the bottom of the protective shell due to the presence of the welding slag after it is installed in the protective shell.

[0051] Next, please refer to Figure 4 and Figure 5 The specific component composition and connection relationship of the fixed part and the moving part in the movable component 200 are disclosed. The fixed part includes a guide rail 210 fixedly connected to the top of the processing table 100, and the moving part includes a pair of sliders 220, with at least two sliders 220.

[0052] Furthermore, at least four sliders 220 are used to fix the longitudinal beam body 101 and the transverse beam body 102 to be welded. Each slider 220 is slidably connected to the guide rail 210. A rack 230 is fixedly connected between two adjacent sliders 220 located on the top of the same guide rail 210.

[0053] Furthermore, a drive gear 231 is provided on one side of the rack 230, and the top of the drive gear 231 is rotatably connected to the processing table 100. The teeth of the drive gear 231 mesh with the teeth of the rack 230. The top of the processing table 100 is provided with a first motor 232 for driving the drive gear 231 to rotate.

[0054] In other words, after the longitudinal beam body 101 and the cross beam body 102 to be welded are placed on the top of the slider 220, the power supply of the first motor 232 is turned on. The first motor 232 drives the drive gear 231 connected to it to rotate through its output shaft. Under the driving action of the drive gear 231, the rotational driving force of the first motor 232 is converted into the linear driving force of the rack 230, so that the longitudinal beam body 101 and the cross beam body 102 to be welded on the top of the slider 220 move on the top of the guide rail 210. After the welding unit welds the longitudinal beam body 101 and the cross beam body 102 together, the grinding unit grinds the weld protrusion at the weld seam flat.

[0055] like Figure 6 and Figure 7As shown, the specific structure and function of the welding unit and the grinding unit in the welding and grinding assembly 300 are disclosed. A raised mounting frame 110 is fixedly installed on the top of the processing table 100. A fixed mounting plate 301 is fixedly connected to the top of the raised mounting frame 110. A lifting mounting plate 302 is provided at intervals below the fixed mounting plate 301. The vertical distance between the lifting mounting plate 302 and the fixed mounting plate 301 is adjustable.

[0056] Based on the above, a number of guide rods are fixedly connected to the top of the lifting mounting plate 302. The guide rods are slidably connected to the fixed mounting plate 301 in the vertical direction. The top of the fixed mounting plate 301 is provided with a hydraulic rod 310 for driving the lifting mounting plate 302 to rise and fall.

[0057] Furthermore, the hydraulic rod 310 includes a cylinder body and a piston rod, with the cylinder body fixedly connected to the fixed mounting plate 301 and the piston rod fixedly connected to the lifting mounting plate 302.

[0058] The welding unit includes a welding gun 320 fixedly mounted on the lifting mounting plate 302, and the grinding unit includes a grinding head 330 rotatably connected to the lifting mounting plate 302. A second motor 331 is provided on the top of the lifting mounting plate 302, and the output shaft of the second motor 331 is coaxially connected to the grinding head 330.

[0059] It should be noted that after the longitudinal beam body 101 and the cross beam body 102 to be welded are placed on the top of the slider 220, the piston rod of the hydraulic rod 310 extends out of the cylinder and drives the lifting mounting plate 302 to descend. Then, the welding gun 320 welds the joint between the longitudinal beam body 101 and the cross beam body 102 together. After the solder cools and solidifies, the power supply of the second motor 331 is turned on and it drives the grinding head 330 to rotate, thereby grinding the solder protrusions on the inner side of the longitudinal beam body 101 and the cross beam body 102 flat. During the process of the slider 220 driving the longitudinal beam body 101 and the cross beam body 102 to move on the top of the guide rail 210, when the welding torch 320 and the grinding head 330 encounter the obstruction of the cross beam body 102, the piston rod of the hydraulic rod 310 retracts into the cylinder, thereby driving the lifting mounting plate 302 to rise, so that the welding torch 320 and the grinding head 330 jump over the top of the cross beam body 102 they encounter, and then drive the welding torch 320 and the grinding head 330 to descend, thereby smoothing the weld seam of the subsequent longitudinal beam body 101 and cross beam body 102.

[0060] Based on the above explanation, the following will be further explained... Figure 8 and Figure 9 To explain the preferred effect of the cooling cleaning assembly 400, the cooling cleaning assembly 400 includes a pull rod 410 fixedly connected to the slider 220. A cylinder 420 is provided at the end of the pull rod 410 away from the slider 220. The outer side of the cylinder 420 is fixedly connected to the top of the processing table 100.

[0061] The improvement is that a sealing plate 411 is slidably connected to the inner wall of the cylinder 420. The sealing plate 411 is fixedly connected to the end of the pull rod 410 away from the slider 220. An air outlet pipe 421 is provided on the side of the pull rod 410 near the slider 220 of the sealing plate 411. An air blowing pipe 430 is provided at the bottom of the lifting mounting plate 302. The outer side of the air blowing pipe 430 is fixedly connected to the lifting mounting plate 302. The air outlet pipe 421 and the air blowing pipe 430 are connected by a sealing hose. The length of the sealing hose in its natural state is greater than the distance between the interface of the air outlet pipe 421 and the air blowing pipe 430.

[0062] Through the above structural design, when the slider 220 drives the longitudinal beam body 101 and the transverse beam body 102 to move at the top of the guide rail 210, the slider 220 drives the sealing plate 411 to slide inside the cylinder 420 through the pull rod 410, and the sealing plate 411 slides towards the side closer to the air outlet pipe 421. The volume of the space inside the cylinder 420 connected to the air outlet pipe 421 gradually decreases, and the gas inside passes through the sealing hose and is finally blown out through the air blowing pipe 430. On the one hand, the weld seam is cooled down, and on the other hand, the air blowing pipe 430 blows away the welding material generated by the grinding head 330 from inside the longitudinal beam body 101 and the transverse beam body 102.

[0063] The working principle of this combined processing device will be described in more detail below:

[0064] First, the longitudinal beam body 101 and the transverse beam body 102 are placed crosswise on the slider 220 and spot-welded for initial fixation; the slider 220 is the moving part of the moving component 200, the slider 220 slides with the guide rail 210, and the rack 230 is assembled between adjacent sliders 220, and the rack 230 meshes with the drive gear 231.

[0065] Next, the first motor 232 is started, which drives the drive gear 231 to rotate. The rotational power is converted into linear power of the rack 230, which drives the slider 220 to carry the longitudinal beam body 101 and the cross beam body 102 to move and transport them along the guide rail 210.

[0066] Next, the lifting mounting plate 302 is equipped with a welding gun 320 and a grinding head 330. The grinding head 330 is driven to rotate by the second motor 331. When the crossbeam body 102 causes obstruction during the conveying process, the hydraulic rod 310 retracts to lift the lifting mounting plate 302. After passing the workpiece, the hydraulic rod 310 extends to reset and descend.

[0067] After the lifting mounting plate 302 is lowered into place, the moving longitudinal beam body 101 and transverse beam body 102 first pass through the upstream welding gun 320, and the welding gun 320 completes the joint welding of the two.

[0068] When slider 220 moves, it synchronously pulls lever 410. Lever 410 causes sealing plate 411 to slide inside cylinder 420. Sealing plate 411 compresses the gas inside cylinder 420. The compressed gas is delivered to air blowing pipe 430 through air outlet pipe 421 and sealing hose. Air blowing pipe 430 is located at the bottom of lifting mounting plate 302, forming the cooling and cleaning assembly 400. Air blowing pipe 430 outputs compressed gas to blow air onto the weld seam that has just been welded, accelerating the cooling and solidification of the molten solder.

[0069] The workpiece is continuously conveyed forward to the downstream grinding unit. The second motor 331 is started to drive the grinding head 330 to rotate. The grinding head 330 grinds away the weld protrusions formed on the inner side of the weld. During the grinding operation, the air pipe 430 continuously sprays air to blow the weld slag generated during grinding out from the shell formed by the longitudinal beam body 101 and the transverse beam body 102, so as to avoid the weld slag residue affecting the subsequent battery pack mold assembly and bonding.

[0070] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A combined processing device for longitudinal beams of new energy vehicles, comprising a pair of movable components (200) spaced apart on the top of a processing table (100), each movable component (200) comprising a fixed part and a movable part, the top of the two movable parts being provided with a longitudinal beam body (101) and a crossbeam body (102) to be welded, the longitudinal beam body (101) and the crossbeam body (102) being fixed in a cross shape, characterized in that: Both of the moving parts are provided with a cooling and cleaning assembly (400) on the side that is far apart from each other. A welding and grinding assembly (300) is provided above the longitudinal beam body (101) and the transverse beam body (102) to be welded. The welding and grinding assembly (300) includes a welding unit and a grinding unit. The welding unit is located upstream of the grinding unit. When the moving part moves the longitudinal beam body (101) and the cross beam body (102) to be welded, the cooling and cleaning component (400) is used to blow air onto the weld joint of the longitudinal beam body (101) and the cross beam body (102) to accelerate the cooling of the weld joint and clean the weld slag after grinding.

2. The combined processing device for longitudinal beams of new energy vehicles according to claim 1, characterized in that: The fixed part includes a guide rail (210) fixedly connected to the top of the processing table (100), and the moving part includes a pair of sliders (220), wherein the pair of sliders (220) includes at least two.

3. The combined processing device for longitudinal beams of new energy vehicles according to claim 2, characterized in that: At least four sliders (220) are used to fix the longitudinal beam body (101) and the transverse beam body (102) to be welded. Each slider (220) is slidably connected to the guide rail (210). A rack (230) is fixedly connected between two adjacent sliders (220) located on the top of the same guide rail (210).

4. The combined processing device for longitudinal beams of new energy vehicles according to claim 3, characterized in that: A drive gear (231) is provided on one side of the rack (230). The top of the drive gear (231) is rotatably connected to the processing table (100). The teeth of the drive gear (231) mesh with the teeth of the rack (230). The top of the processing table (100) is provided with a first motor (232) for driving the drive gear (231) to rotate.

5. The combined processing device for longitudinal beams of new energy vehicles according to claim 1, characterized in that: The top of the processing table (100) is fixedly installed with a raised mounting frame (110), and a fixed mounting plate (301) is fixedly connected to the top of the raised mounting frame (110). A lifting mounting plate (302) is provided at intervals below the fixed mounting plate (301), and the vertical distance between the lifting mounting plate (302) and the fixed mounting plate (301) is adjustable.

6. The combined processing device for longitudinal beams of new energy vehicles according to claim 5, characterized in that: The top of the lifting mounting plate (302) is fixedly connected with several guide rods, which are slidably connected to the fixed mounting plate (301) in the vertical direction. The top of the fixed mounting plate (301) is provided with a hydraulic rod (310) for driving the lifting mounting plate (302) to rise and fall.

7. The combined processing device for longitudinal beams of new energy vehicles according to claim 6, characterized in that: The hydraulic rod (310) includes a cylinder body and a piston rod. The cylinder body is fixedly connected to the fixed mounting plate (301), and the piston rod is fixedly connected to the lifting mounting plate (302).

8. The combined processing device for longitudinal beams of new energy vehicles according to claim 5, characterized in that: The welding unit includes a welding gun (320) fixedly installed on the lifting mounting plate (302), and the grinding unit includes a grinding head (330) rotatably connected to the lifting mounting plate (302). The top of the lifting mounting plate (302) is provided with a second motor (331), and the output shaft of the second motor (331) is coaxially connected to the grinding head (330).

9. The combined processing device for longitudinal beams of new energy vehicles according to claim 2, characterized in that: The cooling and cleaning assembly (400) includes a pull rod (410) fixedly connected to the slider (220). A cylinder (420) is provided at one end of the pull rod (410) away from the slider (220). The outer side of the cylinder (420) is fixedly connected to the top of the processing table (100).

10. The combined processing device for longitudinal beams of new energy vehicles according to claim 9, characterized in that: A sealing plate (411) is slidably connected to the inner wall of the cylinder (420). The sealing plate (411) is fixedly connected to the end of the pull rod (410) away from the slider (220). An air outlet pipe (421) is provided on the side of the sealing plate (411) near the slider (220). An air blowing pipe (430) is fixedly mounted on the bottom of the lifting mounting plate (302). The air outlet pipe (421) and the air blowing pipe (430) are connected through a sealing hose. The natural length of the sealing hose is greater than the maximum distance between the interfaces of the air outlet pipe (421) and the air blowing pipe (430).

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