Automatic welding machining line for new energy automobile battery tray

Abstract

The invention relates to the technical field of battery tray welding machining, and discloses a new energy automobile battery tray automatic welding machining line which comprises a machining guide rail line, a carrying robot and a double-station welding work station composed of a welding bin, a welding clamp, a double-station welding robot, a ventilation and exhaust system and an automatic control system. The number of the welding clamps is two, the welding clamps are installed on the top of the welding carrying table A and the top of the welding carrying table B respectively, a rotating carrying table is arranged below the welding carrying table A and the welding carrying table B jointly, and transposition limiting mechanisms are arranged outside the welding carrying table A, the welding carrying table B and the rotating carrying table jointly. While the welding processing line is simplified, the load of the welding processing line can be reduced, and the welding processing efficiency is improved; and the rotary double stations can automatically change positions so as to be matched with the carrying robot and the double-station welding robot to alternately carry out feeding, discharging and welding operation, and therefore the continuity of welding operation in the double-station welding work station can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery tray welding processing, and in particular to an automated welding processing line for a battery tray of a new energy vehicle. Background Art

[0002] The battery tray for new energy vehicles is one of the most important components in new energy vehicles such as electric vehicles and plug-in hybrid vehicles. It is mainly used to protect the battery module installed at the bottom of the vehicle and provide structural support. The most commonly used battery trays are aluminum alloy battery trays and high-strength steel battery trays. Compared with aluminum alloy battery trays, high-strength steel battery trays have lower processing costs. The essential process in the processing of high-strength steel battery trays is the welding assembly process, which mainly includes stir friction welding of the entire bottom plate (for splicing of the bottom plate), frame fusion welding (for connecting the frame and the bottom plate), assembly fusion welding (for connecting the assembly) and assembly stir friction welding (for the final splicing of the assembly). Through the reasonable combination and strict control of these welding technologies, the structural strength, sealing and reliability of the high-strength steel battery tray can be ensured.

[0003] After searching, the Chinese invention patent with publication number CN116690042A discloses an automatic welding processing line for battery trays of new energy vehicles, including a processing guide line, welding robots are arranged on both sides of the processing guide line, a welding bracket is arranged on the processing guide line, a plurality of slots are opened on the side of the welding bracket, a welding fixture assembly is movably arranged inside each slot through a conversion adjustment mechanism, and a linear drive mechanism is also arranged on the welding bracket, and the linear drive mechanism is connected to a plurality of welding fixture assemblies on one side of the welding bracket. Compared with the prior art, the conversion adjustment mechanism in the Chinese invention patent with publication number CN116690042A first drives the welding fixture assembly to loosen and separate from the battery tray, and then drives the welding fixture assembly to be built-in and retracted in the slot, which can avoid the welding fixture assembly from affecting the position of the welding point, and at the same time makes one side of the battery tray completely exposed, so as not to interfere with and affect the moving path of the welding robot.

[0004] However, in the process of welding the battery pallet by the above-mentioned automatic welding processing line for the new energy vehicle battery pallet, since the welding process of the battery pallet usually includes multiple processes such as stir friction welding of the whole base plate, frame fusion welding, assembly fusion welding and stir friction welding of the assembly, and the welding types and welding fixtures involved in the multiple processes are mostly different, if the automatic welding of the battery pallet is performed according to the above-mentioned double welding robot, single station, and straight-line walking layout, it is necessary to install multiple sets of welding fixtures on the processing guide line, and the installed multiple sets of welding fixtures will increase the load of the processing guide line, thereby increasing the maintenance cost of the welding processing line; and the above-mentioned handling robot used in conjunction needs to stop the operation of the double welding robots during the loading and unloading process, and the shutdown of the double welding robots will cause the processing efficiency of the welding processing line to decrease. Therefore, there is a need for an automatic welding processing line for the battery pallet of a new energy vehicle that can reduce the load of the processing guide line to reduce maintenance costs and can alternately perform double-station welding operations to improve welding processing efficiency. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings in the prior art that multiple sets of welding fixtures installed on the processing guide line will increase the load of the processing guide line, and single-station welding operation will lead to reduced welding processing efficiency, and an automated welding processing line for new energy vehicle battery trays is proposed.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] An automated welding processing line for a battery tray of a new energy vehicle comprises a processing guide line, a handling robot, and a double-station welding workstation consisting of a welding warehouse, a welding fixture, a double-station welding robot, a ventilation and exhaust system, and an automatic control system. The handling robot is slidably arranged on the top of the processing guide line. The number of the double-station welding workstations is several and fixedly arranged outside the processing guide line. The welding tasks of each double-station welding workstation are different. The internal space of the welding warehouse is divided into a loading and unloading area close to the processing guide line and a welding area away from the processing guide line. The number of the welding fixtures is two and they are respectively installed on the top of a welding platform A and a welding platform B. The welding platform A and the welding platform B are respectively located on both sides of the double-station welding robot and a rotating platform located inside the welding warehouse is commonly arranged below them. A circular opening is opened in the middle of the rotating platform to allow the double-station welding robot to pass through. A transposition and limiting mechanism is commonly arranged on the outside of the welding platform A, the welding platform B and the rotating platform; a sealing auxiliary mechanism capable of sealing the welding area is arranged between the loading and unloading area and the welding area.

[0008] The above technical solution further includes:

[0009] The two-position welding robot and the ventilation and exhaust system are respectively installed on the inner side and inner top of the welding area, and the automatic control system is installed on the outside of the welding warehouse and is connected with the processing guide line, the handling robot, the welding fixture, the two-position welding robot, the ventilation and exhaust system and the transposition limit mechanism.

[0010] An annular rotating groove is provided at the inner bottom of the welding bin, and the rotating platform is rotatably connected to the inside of the annular rotating groove. Two mounting ear plates are symmetrically fixedly connected to the top of the rotating platform, and a rotating rod fixedly connected to the welding platform A or the welding platform B is rotatably connected between the two mounting ear plates on the same side. In the initial position, the welding platform A and the welding platform B are both set at 45°; the welding platform A and the welding platform B set at 45° can facilitate loading and unloading and welding operations.

[0011] The shifting and limiting mechanism includes a driving motor A installed on the inner side of each mounting ear plate and a full-circle gear fixedly connected to the end of the rotating rod, the input end of the driving motor A is connected to the automatic control system, the output end of the driving motor A extends to the outside of the corresponding mounting ear plate and is fixedly connected to a half-circle gear meshing with the full-circle gear, and a limiting member is arranged between the full-circle gear and the half-circle gear; each time the double-position welding robot completes a welding operation, the automatic control system will start the driving motor A to rotate one circle in the direction away from the processing guide line, so that the full-circle gear rotates 45° in the direction close to the processing guide line, stops self-rotation, and then rotates 135° in the direction close to the processing guide line.

[0012] The limiting member includes a receiving groove opened on the outside of each mounting ear plate and a sliding frame slidably connected to the outside of each mounting ear plate, a clamping spring is fixedly connected between the receiving groove and the sliding frame, a limiting rod and an abutting rod are fixedly connected to the side of the sliding frame away from the clamping spring, a limiting circular hole matched with the limiting rod is opened on the inner side of the full circle gear, an annular passing groove is opened on the inner side of the half circle gear, and a half circle abutting ring for abutting the abutting rod is fixedly connected inside the annular passing groove; after the half circle gear is rotated 45° in the direction away from the processing guide line, the limiting rod can enter the inside of the limiting circular hole to realize the limitation of welding platform A and welding platform B.

[0013] The shifting and limiting mechanism also includes a driving motor B installed in the middle of the annular rotating groove and an inner gear ring fixedly connected to the inner side of the circular opening. The input end of the driving motor B is connected in series with two side touch switches and a bottom touch switch. The two side touch switches are respectively located on the outsides of the welding platform A and the welding platform B and are respectively installed on the inner sides of the two mounting ear plates on different sides. The bottom touch switch is installed inside the annular rotating groove and close to the loading and unloading area. The output end of the driving motor B is fixedly connected with a driving gear, and the outer side of the driving gear is symmetrically meshed with a meshing gear meshing with the inner gear ring. When the welding platform A and the welding platform B are in a vertical position, the two side touch switches can be squeezed and the bottom touch switch can be squeezed by a self-resetting squeezing column, thereby realizing the rotation and shifting of the rotating platform.

[0014] The displacement limiting mechanism also includes a cylindrical groove A and a cylindrical groove B opened on the outside of the rotating platform, and an extrusion protrusion A and an extrusion protrusion B fixedly connected to the outside of the welding platform A and the welding platform B. The cylindrical groove A and the cylindrical groove B are symmetrically distributed and are slidably connected with self-resetting extrusion columns inside. The bottoms of the cylindrical groove A and the cylindrical groove B are commonly connected with an annular extrusion groove. The extrusion protrusion A in the initial position is located at the bottom of the welding platform A, and the extrusion protrusion B in the initial position is located at the top of the welding platform B. After the rotating platform rotates 180° to achieve displacement, the bottom touch switch loses the extrusion of the annular extrusion groove and resets into the inside of the cylindrical groove B, thereby realizing the stop displacement of the rotating platform.

[0015] The sealing auxiliary mechanism includes a fixed plate fixedly connected to the top of the welding chamber, a cavity is opened inside the fixed plate, a telescopic plate is slidably connected inside the cavity, a buffer pad capable of contacting the rotating platform is arranged at the bottom of the telescopic plate, a magnet block group is arranged at the top of the telescopic plate, an electromagnetic block group is installed at the inner top of the cavity, the electromagnetic block group can adsorb the magnet block group when energized, the input end of the electromagnetic block group is connected in series with two energized touch switches, the two energized touch switches are respectively located on the outside of the welding platform A and the welding platform B and are respectively installed on the inner sides of the two mounting ear plates on different sides; when the welding platform A and the welding platform B finish the position change and continue to rotate in the direction close to the processing guide line to be set at 45°, the telescopic plate can be extended to seal the welding area, thereby avoiding the overflow of welding smoke inside the welding area and reducing the processing space of the ventilation and exhaust system.

[0016] A piston block sleeved on the outside of the magnet block group is installed on the top of the telescopic plate, and one-way air blowing pipe groups connected to the cavity are arranged on both sides of the fixed plate. The one-way air blowing pipe groups on both sides extend to the interior of the loading and unloading area and the welding area respectively and are fixedly connected to the blowing bins located above the two mounting ear plates, and a one-way air inlet pipe group connected to the cavity is arranged on the top of the fixed plate; when the telescopic plate is retracted into the cavity, the air inside the cavity can be squeezed into the blowing bin to blow and cool the battery tray after welding and blow and remove dust from the battery tray before welding.

[0017] The present invention has the following beneficial effects:

[0018] 1. The present invention performs automated welding of battery trays by adopting a layout of processing guide rails, sliding transport robots and fixed double-station welding workstations, so that the welding processing line can sequentially perform multiple welding processes through welding fixtures with different clamping positions inside each double-station welding workstation and double-station welding robots with different welding types, and the rotating double-station inside the double-station welding workstation can alternately perform welding operations on the battery tray, which simplifies the welding processing line while reducing the load of the welding processing line and improving the welding processing efficiency.

[0019] 2. After the welding operation of the double-position welding robot in the present invention is completed, the driving motor A will rotate one circle in the direction away from the processing guide line. In this process, the self-rotation storage of the welding platform A and the welding platform B, the autonomous limiting of the welding platform A and the welding platform B, the rotation of the rotating platform to drive the stored welding platform A and the welding platform B to rotate and change position, the release of the limit of the welding platform A and the welding platform B, and the resetting of the welding platform A and the welding platform B after the change of position can be realized in turn. That is, the rotating double-station can change position autonomously to cooperate with the handling robot and the double-position welding robot to alternately perform loading and unloading and welding operations, thereby realizing the continuity of the welding operation inside the double-station welding workstation.

[0020] 3. The telescopic plate in the present invention can be retracted before the welding platform A and the welding platform B rotate and change positions. At the same time, the air blowing bins on both sides can blow air to remove dust on the battery tray workpieces to be welded in the loading and unloading areas and blow air to cool the welded battery tray workpieces in the welding area. The telescopic plate can seal the welding area after the welding platform A and the welding platform B rotate and change positions to prevent the welding fume in the welding area from overflowing and reduce the processing space of the ventilation and exhaust system, thereby improving the ventilation and exhaust effect in the welding area. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of an automated welding processing line for a new energy vehicle battery tray proposed by the present invention;

[0022] Figure 2 It is a schematic diagram of the external structure of the double-station welding workstation in the present invention;

[0023] Figure 3 It is a schematic diagram of the internal structure of the double-station welding workstation in the present invention;

[0024] Figure 4 for Figure 3 A side view structural schematic diagram of;

[0025] Figure 5 It is a schematic diagram of the structure of the rotating platform in the present invention;

[0026] Figure 6 It is a structural schematic diagram of the welding platform A in the present invention;

[0027] Figure 7 It is a schematic diagram of the structure of the full circle gear and the half circle gear in the present invention;

[0028] Figure 8 for Figure 7 A schematic diagram of the structure enlargement in the middle;

[0029] Fig. 9 It is a schematic structural diagram of the annular through groove and the half-circle abutment ring in the present invention;

[0030] Fig.10 It is a schematic diagram of the structure of the driving gear and the meshing gear in the present invention;

[0031] Fig.11 for Figure 5 Schematic diagram of the side section structure;

[0032] Fig.12 for Fig.11 A magnified schematic diagram of the structure at B in the middle;

[0033] Fig.13 for Fig.11 Enlarged schematic diagram of the structure at point C in the middle.

[0034] In the figure: 100, processing guide line; 200, handling robot; 300, double-station welding workstation; 301, welding warehouse; 302, welding fixture; 303, double-station welding robot; 304, ventilation and exhaust system; 305, automatic control system; 306, loading and unloading area; 307, welding area; 308, welding platform A; 309, welding platform B; 310, rotating platform; 311, circular opening; 312, annular rotating groove; 313, mounting ear plate; 314, rotating rod; 315, driving motor A; 316, full circle gear; 317, half circle gear; 318, receiving groove; 319, sliding frame; 320, tightening spring; 321, limit rod; 322, abutment rod; 32 3. Limiting circular hole; 324. Annular passing groove; 325. Half-circle abutment ring; 326. Driving motor B; 327. Internal gear ring; 328. Side touch switch; 329. Bottom touch switch; 330. Driving gear; 331. Engaging gear; 332. Cylindrical groove A; 333. Cylindrical groove B; 334. Extrusion convex block A; 335. Extrusion convex block B; 336. Self-resetting extrusion column; 337. Annular extrusion groove; 338. Fixed plate; 339. Cavity; 340. Telescopic plate; 341. Buffer pad; 342. Magnet block group; 343. Electromagnetic block group; 344. Power-on touch switch; 345. Piston block; 346. One-way air blowing pipe group; 347. Air blowing chamber; 348. One-way air inlet pipe group. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Embodiment 1

[0037] like Figure 1-Figure 13As shown, an automated welding processing line for a new energy vehicle battery tray proposed by the present invention includes a processing guide line 100, a handling robot 200, and a double-station welding workstation 300 composed of a welding bin 301, a welding fixture 302, a double-station welding robot 303, a ventilation and exhaust system 304, and an automatic control system 305. The double-station welding robot 303 generally includes a multi-axis robot and a laser welding device or a CMT welding device installed at the end of the multi-axis robot mechanical arm, so as to realize multi-angle welding, high-efficiency welding or low heat input welding. The double-station welding robot 303 and the ventilation and exhaust system 304 are respectively installed on the inner side and the inner top of the welding area 307, and the automatic control system 305 is installed on the outside of the welding bin 301 and The automatic control system 305 is connected with the processing guide line 100, the handling robot 200, the welding fixture 302, the two-position welding robot 303, the ventilation and exhaust system 304 and the transposition limit mechanism. The automatic control system 305 generally includes a sensor module for real-time collection of welding data, a data acquisition module for real-time collection of welding data, and an analysis control module for analyzing the data in the data acquisition module and adjusting the welding parameters of the laser welding device or the CMT welding device. The specific structures and connection methods of the processing guide line 100, the handling robot 200, and the welding bin 301, the welding fixture 302, the two-position welding robot 303, the ventilation and exhaust system 304, and the automatic control system 305 all adopt the existing technology, so they are not described in detail in this embodiment;

[0038] The handling robot 200 is slidably arranged on the top of the processing guide line 100. There are several double-station welding workstations 300 and they are fixedly arranged outside the processing guide line 100. The welding tasks of each double-station welding workstation 300 are different, that is, the clamping position of the welding fixture 302 inside each double-station welding workstation 300 on the workpiece and the welding type of the workpiece by the double-station welding robot 303 are not exactly the same. The internal space of the welding warehouse 301 is divided into a loading and unloading area 306 close to the processing guide line 100 and a welding area 307 far away from the processing guide line 100. There are two welding fixtures 302 and they are respectively installed on the top of the welding platform A308 and the welding platform B309. The top of the rotating platform 310 is symmetrically fixedly connected with two mounting ear plates 313. A rotating rod 314 fixedly connected to the welding platform A308 or the welding platform B309 is rotatably connected between the two mounting ear plates 313 on the same side. The welding platform A308 and the welding platform B309 in the initial position are both set at 45°. The welding platform A308 and the welding platform B309 set at 45° can facilitate loading and unloading and welding operations. The welding platform A308 and the welding platform B309 are respectively located on both sides of the double-position welding robot 303 and a rotating platform 310 located inside the welding bin 301 is commonly arranged below them. An annular rotating groove 312 is provided at the inner bottom of the welding bin 301. The rotating platform 310 is rotatably connected inside the annular rotating groove 312. A circular opening 311 is provided in the middle of the rotating platform 310 to allow the double-position welding robot 303 to pass through.

[0039] By adopting the layout of the processing guide line 100, the sliding transfer robot 200 and the fixed double-station welding workstation 300 to perform automated welding of the battery tray, the welding processing line can sequentially perform multiple welding processes through the welding fixtures 302 with different clamping positions inside each double-station welding workstation 300 and the double-station welding robots 303 with different welding types, and the rotating double-station inside the double-station welding workstation 300 can alternately perform the welding operation of the battery tray, that is, the welding processing line can be simplified while reducing the load of the welding processing line and improving the welding processing efficiency;

[0040] The outsides of the welding platform A308, the welding platform B309 and the rotating platform 310 are jointly provided with a transposition limiting mechanism, which includes a driving motor A315 installed on the inner side of each mounting ear plate 313 and a full-circle gear 316 fixedly connected to the end of the rotating rod 314. The input end of the driving motor A315 is controlled and connected with the automatic control system 305. Every time the double-position welding robot 303 completes a welding operation, the automatic control system 305 will start the driving motor A315 to rotate one circle in the direction away from the processing guide line 100. The output end of the driving motor A315 extends to the outside of the corresponding mounting ear plate 313 and is fixedly connected with a half-circle gear 317 meshing with the full-circle gear 316. During the process of the half-circle gear 317 rotating one circle in the direction away from the processing guide line 100, the full-circle gear 316 will rotate 45° in the direction close to the processing guide line 100, stop rotating, and then rotate 135° in the direction close to the processing guide line 100.

[0041] A limiting member is arranged between the full circle gear 316 and the half circle gear 317, and the limiting member includes a receiving groove 318 provided on the outer side of each mounting ear plate 313 and a sliding frame 319 slidably connected to the outside of each mounting ear plate 313, a clamping spring 320 is fixedly connected between the receiving groove 318 and the sliding frame 319, a limiting rod 321 and an abutting rod 322 are fixedly connected to the side of the sliding frame 319 away from the clamping spring 320, a limiting circular hole 323 adapted to the limiting rod 321 is arranged on the inner side of the full circle gear 316, an annular through groove 324 is arranged on the inner side of the half circle gear 317, a half circle abutting ring 325 for abutting the abutting rod 322 is fixedly connected inside the annular through groove 324, and the half circle gear 317 is directed away from the full circle gear 316. After rotating 45° away from the processing guide line 100, the full circle gear 316 drives the inner limiting circular hole 323 to rotate 45° toward the processing guide line 100 and align with the limiting rod 321, and at the same time, the half circle abutment ring 325 follows the half circle gear 317 to rotate and disengage from the abutment rod 322 and allow the abutment rod 322 to enter the inside of the annular through groove 324, and the compressed abutment spring 320 immediately drives the limiting rod 321 to enter the inside of the limiting circular hole 323 through the sliding frame 319, thereby realizing the limiting of the welding platform A308 and the welding platform B309, so as to prevent the rotating platform 310 from driving the welding platform A308 and the welding platform B309 to collide with the double-position welding robot 303 during the rotation process;

[0042] The shifting and limiting mechanism also includes a driving motor B326 installed in the middle of the annular rotating groove 312 and an inner gear ring 327 fixedly connected to the inner side of the circular opening 311. The output end of the driving motor B326 is fixedly connected to a driving gear 330. The outer side of the driving gear 330 is symmetrically meshed with a meshing gear 331 meshed with the inner gear ring 327. When the driving motor B326 is started, the rotating platform 310 can be driven to rotate through the driving gear 330, the meshing gear 331 and the inner gear ring 327. The input end of the driving motor B326 is connected in series with two side touch switches 328 and a bottom touch switch 329. The two side touch switches When both the side touch switches 328 and the bottom touch switch 329 are pressed to connect the circuit, the driving motor B326 will start. The two side touch switches 328 are respectively located on the outside of the welding platform A308 and the welding platform B309 and are respectively installed on the inner sides of the two mounting ear plates 313 on different sides. The bottom touch switch 329 is installed inside the annular rotating groove 312 and close to the loading and unloading area 306. That is, after the welding platform A308 and the welding platform B309 are rotated to a vertical position, the two side touch switches 328 can be squeezed and the bottom touch switch 329 can be squeezed by the self-resetting squeezing column 336, thereby realizing the rotation and transposition of the rotating platform 310.

[0043] The shifting limit mechanism also includes a cylindrical groove A332 and a cylindrical groove B333 opened on the outside of the rotating platform 310, and an extrusion protrusion A334 and an extrusion protrusion B335 fixedly connected to the outside of the welding platform A308 and the welding platform B309. The cylindrical groove A332 and the cylindrical groove B333 are symmetrically distributed and are slidably connected inside with a self-resetting extrusion column 336. The bottoms of the cylindrical groove A332 and the cylindrical groove B333 are commonly connected with an annular extrusion groove 337. The extrusion protrusion A334 in the initial position is located at the bottom of the welding platform A308, and the extrusion protrusion B335 in the initial position is located at the top of the welding platform B309. After the rotating platform 310 rotates 180° to achieve shifting, the bottom touch switch 329 loses the extrusion of the annular extrusion groove 337 and resets into the inside of the cylindrical groove B333, thereby realizing the stop shifting of the rotating platform 310.

[0044] Working principle of this embodiment: After the welding operation of the two-position welding robot 303 is completed, the automatic control system 305 starts the driving motor A315 to rotate one circle in the direction away from the processing guide line 100, so that the half-circle gear 317 rotates one circle in the direction away from the processing guide line 100. The process of the half-circle gear 317 rotating one circle can be divided into three stages;

[0045] Stage 1: After the half-circle gear 317 rotates 45° in the direction away from the processing guide line 100, the full-circle gear 316 meshing with the half-circle gear 317 rotates 45° in the direction close to the processing guide line 100, that is, the welding platform A308 and the welding platform B309 rotate 45° in the direction close to the processing guide line 100 to be in a vertical position, and at the same time, the half-circle abutment ring 325 rotates with the half-circle gear 317 and disengages from the abutment rod 322, and the limiting circular hole 323 rotates with the full-circle gear 316 and aligns with the limiting circular hole 321, and the compressed abutment spring 320 drives the abutment rod 322 to enter the inside of the annular through groove 324 and the limiting rod 321 to enter the inside of the limiting circular hole 323 through the sliding frame 319, thereby realizing the limitation of the welding platform A308 and the welding platform B309, so as to prevent the rotating platform 310 from driving the welding platform A308 and the welding platform B309 to collide during the rotation process;

[0046] The welding platform A308 and the welding platform B309 rotate to a vertical position to squeeze the two side touch switches 328 inside the two mounting ear plates 313, and squeeze the self-resetting squeezing column 336 inside the cylindrical groove A332 by squeezing the protrusion A334, so that the bottom touch switch 329 is squeezed, that is, the two side touch switches 328 and the bottom touch switch 329 are pressed to connect the circuit;

[0047] Stage 2: The half-circle gear 317 continues to rotate in the direction away from the processing guide line 100, and the full-circle gear 316 that is no longer meshed with the half-circle gear 317 is not affected by it. At the same time, the driving motor B326 starts and drives the rotating platform 310 to rotate through the driving gear 330, the meshing gear 331 and the inner gear ring 327. During this process, the annular extrusion groove 337 continues to squeeze the bottom touch switch 329, and the rotating platform 310 drives the welding platform A308 and the welding platform B309 in the vertical position to rotate 180 °After the transposition is achieved, the bottom touch switch 329 loses the extrusion of the annular extrusion groove 337 and resets into the inside of the cylindrical groove B333, and the driving motor B326 is turned off to stop the rotation of the self-rotating platform 310. After the half-circle gear 317 rotates 225° in the direction away from the processing guide line 100, the half-circle abutment ring 325 follows the half-circle gear 317 to rotate and abut against the abutment rod 322, so that the limiting rod 321 is disengaged from the limiting circular hole 323, so as to release the limiting of the welding platform A308 and the welding platform B309;

[0048] Stage 3: After the half-circle gear 317 rotates 135° in the direction away from the processing guide line 100, the full-circle gear 316 meshing with the half-circle gear 317 rotates 135° in the direction close to the processing guide line 100, so that the welding platform A308 and the welding platform B309 after the 180° transposition are restored to the initial 45° position, so as to facilitate loading and unloading and welding operations;

[0049] After the 180° displacement, the welding platform A308 and the welding platform B309 can be rotated to a 45° position and can be disengaged from the two side touch switches 328, and the self-resetting extrusion column 336 inside the cylindrical groove A332 can be reset, that is, the welding platform A308 and the welding platform B309 exchange positions, and the battery tray workpiece to be welded on the welding platform A308 enters the interior of the welding area 307, and the battery tray workpiece that has been welded on the welding platform B309 enters the loading and unloading area 306.

[0050] The main difference between this embodiment and the prior art is that after the welding operation of the double-position welding robot 303 in this embodiment is completed, the driving motor A315 will rotate one circle in the direction away from the processing guide line 100. In this process, the self-rotation storage of the welding platform A308 and the welding platform B309, the autonomous limiting of the welding platform A308 and the welding platform B309, the rotating platform 310 driving the stored welding platform A308 and the welding platform B309 to rotate 180° for replacement, the limit release of the welding platform A308 and the welding platform B309, and the resetting of the welding platform A308 and the welding platform B309 after the 180° replacement can be realized in turn. That is, the rotating double-station can be replaced autonomously to cooperate with the handling robot 200 and the double-position welding robot 303 to alternately perform loading and unloading and welding operations, thereby realizing the continuity of the welding operation inside the double-station welding workstation 300.

[0051] Embodiment 2

[0052] like Figure 1-Figure 4 As shown, based on the first embodiment, a sealing auxiliary mechanism capable of sealing the welding zone 307 is provided between the loading and unloading zone 306 and the welding zone 307, and the sealing auxiliary mechanism comprises a fixed plate 338 fixedly connected to the top of the welding chamber 301, a cavity 339 is provided inside the fixed plate 338, a telescopic plate 340 is slidably connected inside the cavity 339, a buffer pad 341 capable of contacting the rotating platform 310 is provided at the bottom of the telescopic plate 340, and when the telescopic plate 340 extends out of the sealing welding zone 307, the fume from welding inside the welding zone 307 can be prevented from overflowing and the processing space of the ventilation and exhaust system 304 can be reduced, thereby improving the ventilation and exhaust effect inside the welding zone 307;

[0053] A magnet block group 342 is arranged on the top of the telescopic plate 340, and an electromagnetic block group 343 is installed on the inner top of the cavity 339. The electromagnetic block group 343 can attract the magnet block group 342 when it is energized. The input end of the electromagnetic block group 343 is connected in series with two energized touch switches 344. The two energized touch switches 344 are respectively located on the outside of the welding platform A308 and the welding platform B309 and are respectively installed on the inside of two mounting ear plates 313 on different sides, that is, the welding platform A308 and the welding platform B309. After B309 rotates 45° toward the direction close to the processing guide line 100 to a vertical position, it can squeeze the two energized touch switches 344 so that the electromagnetic block group 343 is energized to adsorb the telescopic plate 340 into the cavity 339. When the welding platform A308 and the welding platform B309 are replaced and continue to rotate toward the direction close to the processing guide line 100 to be set at 45°, they can be separated from the two energized touch switches 344 so that the telescopic plate 340 is extended to seal the welding area 307;

[0054] A piston block 345 mounted on the outside of the magnet block group 342 is installed on the top of the telescopic plate 340, and one-way air blowing pipe groups 346 connected to the cavity 339 are arranged on both sides of the fixed plate 338. The one-way air blowing pipe groups 346 on both sides extend to the interior of the loading and unloading area 306 and the welding area 307 respectively and are fixedly connected to a blowing bin 347 located above the two mounting ear plates 313. A one-way air inlet pipe group 348 connected to the cavity 339 is arranged on the top of the fixed plate 338. When the telescopic plate 340 is retracted into the cavity 339, the air inside the cavity 339 can be squeezed into the blowing bin 347 to blow air to cool the battery tray after welding and blow air to remove dust from the battery tray before welding.

[0055] The working principle of this embodiment is as follows: when the welding platform A308 and the welding platform B309 are rotated and stored to the vertical position, they can squeeze the two energized touch switches 344 so that the electromagnetic block group 343 is energized to attract the magnet block group 342, so that the telescopic plate 340 can be stored in the cavity 339, that is, the telescopic plate 340 can be stored before the welding platform A308 and the welding platform B309 are rotated and replaced, and in the process of the telescopic plate 340 being stored in the cavity 339, the air inside the cavity 339 can be squeezed into the one-way blowing pipe group 346 on both sides, so that the blowing bins 347 on both sides can blow and remove dust on the battery tray workpiece to be welded in the loading and unloading area 306, and can blow and cool the welded battery tray workpiece in the welding area 307;

[0056] When the welding carrier A308 and the welding carrier B309 after the transposition rotate and reset to the 45° position, they can be separated from the two energized touch switches 344 to cut off the power of the electromagnetic block group 343, so that the telescopic plate 340 can extend out of the cavity 339 due to its own gravity and contact with the rotating carrier 310, that is, the telescopic plate 340 can seal the welding area 307 after the welding carrier A308 and the welding carrier B309 rotate and transpose, so as to prevent the welding fume inside the welding area 307 from overflowing and reduce the processing space of the ventilation and exhaust system 304, so as to improve the ventilation and exhaust effect inside the welding area 307;

[0057] The main difference between this embodiment and the prior art is that the telescopic plate 340 in this embodiment can be retracted before the welding platform A308 and the welding platform B309 are rotated and replaced, and at the same time, the air blowing bins 347 on both sides can blow air to remove dust on the battery tray workpieces to be welded in the loading and unloading area 306 and blow air to cool the welded battery tray workpieces in the welding area 307, and the telescopic plate 340 can seal the welding area 307 after the welding platform A308 and the welding platform B309 are rotated and replaced, so as to prevent the welding fume in the welding area 307 from overflowing and reduce the processing space of the ventilation and exhaust system 304, thereby improving the ventilation and exhaust effect in the welding area 307.

[0058] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automated welding processing line for a battery tray of a new energy vehicle, comprising a processing guide rail line (100), a handling robot (200), and a double-station welding workstation (300) composed of a welding bin (301), a welding fixture (302), a double-station welding robot (303), a ventilation and exhaust system (304), and an automated control system (305), characterized in that: The handling robot (200) is slidably arranged on the top of the processing guide line (100), the number of the double-station welding workstations (300) is several and fixedly arranged outside the processing guide line (100), the welding tasks of each of the double-station welding workstations (300) are different, the internal space of the welding warehouse (301) is divided into a loading and unloading area (306) close to the processing guide line (100) and a welding area (307) far away from the processing guide line (100), the number of the welding fixtures (302) is two and they are respectively installed on the welding platform A (308) and a top of a welding platform B (309), the welding platform A (308) and the welding platform B (309) are respectively located on both sides of the two-position welding robot (303) and a rotating platform (310) located inside the welding bin (301) is commonly arranged below them, a circular opening (311) is opened in the middle of the rotating platform (310) to allow the two-position welding robot (303) to pass through, and a displacement limiting mechanism is commonly arranged outside the welding platform A (308), the welding platform B (309) and the rotating platform (310); A sealing auxiliary mechanism capable of sealing the welding area (307) is provided between the loading and unloading area (306) and the welding area (307).

2. According to claim 1, the automatic welding processing line for battery trays of new energy vehicles is characterized by: The two-position welding robot (303) and the ventilation and exhaust system (304) are respectively installed on the inner side and the inner top of the welding area (307); the automatic control system (305) is installed outside the welding warehouse (301) and is connected to the processing guide line (100), the handling robot (200), the welding fixture (302), the two-position welding robot (303), the ventilation and exhaust system (304) and the position change limit mechanism.

3. According to claim 1, the automatic welding processing line for battery trays of new energy vehicles is characterized in that: The inner bottom of the welding bin (301) is provided with an annular rotating groove (312), the rotating platform (310) is rotatably connected to the inside of the annular rotating groove (312), the top of the rotating platform (310) is symmetrically fixedly connected with two mounting ear plates (313), and a rotating rod (314) fixedly connected to the welding platform A (308) or the welding platform B (309) is rotatably connected between the two mounting ear plates (313) on the same side, and the welding platform A (308) and the welding platform B (309) are both set at 45 degrees in the initial position.

4. According to claim 3, the automatic welding processing line for battery trays of new energy vehicles is characterized in that: The shifting and limiting mechanism comprises a driving motor A (315) installed inside each mounting ear plate (313) and a full-circle gear (316) fixedly connected to the end of the rotating rod (314); the input end of the driving motor A (315) is control-connected to the automatic control system (305); the output end of the driving motor A (315) extends to the outside of the corresponding mounting ear plate (313) and is fixedly connected to a half-circle gear (317) meshing with the full-circle gear (316); and a limiting member is arranged between the full-circle gear (316) and the half-circle gear (317).

5. The automatic welding processing line for battery trays of new energy vehicles according to claim 4 is characterized in that: The limiting member comprises a receiving groove (318) provided on the outside of each mounting ear plate (313) and a sliding frame (319) slidably connected to the outside of each mounting ear plate (313); a clamping spring (320) is fixedly connected between the receiving groove (318) and the sliding frame (319); a limiting rod (321) and an abutting rod (322) are fixedly connected to the side of the sliding frame (319) away from the clamping spring (320); a limiting circular hole (323) matched with the limiting rod (321) is provided on the inner side of the full circle gear (316); an annular through groove (324) is provided on the inner side of the half circle gear (317); a half circle abutting ring (325) for abutting the abutting rod (322) is fixedly connected inside the annular through groove (324).

6. The automatic welding processing line for battery trays of new energy vehicles according to claim 3 is characterized in that: The shifting and limiting mechanism also includes a driving motor B (326) installed in the middle of the annular rotating groove (312) and an inner gear ring (327) fixedly connected to the inner side of the circular opening (311); the input end of the driving motor B (326) is connected in series with two side touch switches (328) and a bottom touch switch (329); the two side touch switches (328) are respectively located on the outer sides of the welding platform A (308) and the welding platform B (309) and are respectively installed on the inner sides of the two mounting ear plates (313) on different sides; the bottom touch switch (329) is installed inside the annular rotating groove (312) and close to the loading and unloading area (306); the output end of the driving motor B (326) is fixedly connected with a driving gear (330); the outer side of the driving gear (330) is symmetrically meshed with a meshing gear (331) meshed with the inner gear ring (327).

7. The automatic welding processing line for battery trays of new energy vehicles according to claim 1 is characterized in that: The displacement limiting mechanism also includes a columnar groove A (332) and a columnar groove B (333) provided on the outside of the rotating platform (310), and an extrusion protrusion A (334) and an extrusion protrusion B (335) fixedly connected to the outside of the welding platform A (308) and the welding platform B (309), wherein the columnar groove A (332) and the columnar groove B (333) are symmetrically distributed and both are slidably connected with a self-resetting extrusion column (336) inside, and the bottoms of the columnar groove A (332) and the columnar groove B (333) are connected with an annular extrusion groove (337) in common, and the extrusion protrusion A (334) in the initial position is located at the bottom of the welding platform A (308), and the extrusion protrusion B (335) in the initial position is located at the top of the welding platform B (309).

8. The automatic welding processing line for battery trays of new energy vehicles according to claim 3 is characterized in that: The sealing auxiliary mechanism comprises a fixed plate (338) fixedly connected to the top of the welding chamber (301), a cavity (339) is opened inside the fixed plate (338), a telescopic plate (340) is slidably connected inside the cavity (339), a buffer pad (341) capable of contacting the rotating platform (310) is arranged at the bottom of the telescopic plate (340), a magnet block group (342) is arranged at the top of the telescopic plate (340), an electromagnetic block group (343) is installed at the inner top of the cavity (339), the electromagnetic block group (343) can adsorb the magnet block group (342) when energized, the input end of the electromagnetic block group (343) is connected in series with two energized touch switches (344), the two energized touch switches (344) are respectively located on the outside of the welding platform A (308) and the welding platform B (309) and are respectively installed on the inside of the two mounting ear plates (313) on different sides.

9. The automatic welding processing line for battery trays of new energy vehicles according to claim 8 is characterized in that: A piston block (345) sleeved on the outside of the magnet block group (342) is installed on the top of the telescopic plate (340), and a one-way air blowing pipe group (346) connected to the cavity (339) is arranged on both sides of the fixed plate (338). The one-way air blowing pipe groups (346) on both sides extend to the inside of the loading and unloading area (306) and the welding area (307) respectively and are fixedly connected to the blowing bin (347) located above the two mounting ear plates (313). A one-way air inlet pipe group (348) connected to the cavity (339) is arranged on the top of the fixed plate (338).

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