Clamping-assisting tailor-welding device and application thereof in new energy automobile production

Abstract

The invention relates to a tailor-welding technology, in particular to an auxiliary clamping tailor-welding device and application of the auxiliary clamping tailor-welding device in new energy automobile production, the auxiliary clamping tailor-welding device comprises a welding table, a lifting moving frame arranged on the welding table and a laser welding machine installed on the lifting moving frame, and an auxiliary clamping structure is installed on the lifting moving frame; and the auxiliary clamping structure is connected with the laser welding machine. Through the reasonably-designed structural combination and connection relation of the auxiliary clamping structures, when a workpiece is welded and a laser welding machine moves to a welding position, the auxiliary clamping structures at the corresponding position can give way in a linkage mode, space is given for the laser welding machine, the laser welding machine can continuously weld the workpiece, and the welding efficiency is improved. And when the laser welding machine moves to the next welding position, the receding auxiliary clamping structure can be reset, so that the welded workpiece is clamped, positioned and used, and a welding seam of the workpiece is prevented from being influenced by residual stress or thermal expansion of the workpiece.

Description

Technical Field

[0001] The present invention relates to a welding technology, specifically a welding device with auxiliary clamping and its application in the production of new energy vehicles. Background Art

[0002] A welding device is a mechanical equipment used to connect different parts or materials together by welding. It is usually applied in manufacturing industries, especially in industries such as automotive, aviation, shipbuilding, and steel, for joining multiple components into an integral structure in large-scale production. The welding device can automatically complete the welding task during the production process, improve work efficiency, ensure welding quality, and at the same time reduce the risks and costs of manual operations.

[0003] When the current welding device is in use, the workpiece is usually placed on the welding table for welding operations. However, due to the irregular shape of the workpiece itself or factors such as welding slag and oil stains remaining on the surface of the welding table, the welding contact surface of the workpiece often cannot be precisely fitted, resulting in a decline in welding quality. In this case, the contact between the workpiece and the welding table is incomplete or uneven, which will affect the flatness and firmness of the weld seam, and may even cause the weld seam at the welded joint to be incomplete or defective; in order to address this situation, auxiliary clamping equipment is generally used to clamp and position the workpiece to ensure that the workpiece maintains a stable and precise relative position during the welding process, avoiding displacement or deviation during the welding process, thereby ensuring the quality of the welded joint.

[0004] However, in the actual use process of the existing auxiliary clamping equipment, new problems often arise. The most prominent one is that due to the presence of the clamping device, some clamping areas will be covered or restricted by the fixture, resulting in the workpiece in this part being unable to be directly welded, thus forming a welding dead angle. The existence of this dead angle, although caused by the clamping requirements of the fixture, greatly affects the integrity and quality of welding. Especially in workpieces requiring high-precision welding, problems such as uneven welding and insufficient welding strength may occur. In order to ensure the stability and welding quality of the workpiece, the auxiliary clamping equipment usually needs to disengage from the clamping position of the workpiece during the welding process to release space for the welding equipment to enter the welding area. However, once the fixture is disengaged, the workpiece itself may undergo slight deformation or position deviation due to residual welding stress, thermal expansion, or temperature difference. In this way, although the welding process has been completed, the connection at the weld seam may be affected, resulting in problems such as insecure welding, insufficient strength of the welded joint, or even local fracture. Summary of the Invention

[0005] The purpose of the present invention is to provide a welding device with auxiliary clamping and its application in the production of new energy vehicles to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The auxiliary clamping welding device comprises a welding table, a lifting and moving frame arranged on the welding table, and a laser welding machine installed on the lifting and moving frame, wherein an auxiliary clamping structure is installed on the lifting and moving frame, and the auxiliary clamping structure is connected to the laser welding machine;

[0008] The auxiliary clamping structure includes a mounting mechanism mounted on the lifting and moving frame, a driving mechanism is arranged on the mounting mechanism, a plurality of positioning mechanisms are arranged on the driving mechanism, and a circulating yielding mechanism is arranged on the mounting mechanism, the positioning mechanism is connected to the mounting mechanism, the circulating yielding mechanism is connected to the plurality of positioning mechanisms, and the circulating yielding mechanism is mounted on the laser welding machine;

[0009] When the lifting and moving frame is vertically lifted and adjusted on the welding table, it is used to drive the multiple positioning mechanisms to be lifted and adjusted on the welding table to clamp and fix the workpiece placed on the welding table. When the laser welding machine is moved and welded on the lifting and moving frame, it is used to drive the cyclical giving way mechanism to move on the mounting mechanism. When the cyclical giving way mechanism is actuated, it is used to drive the positioning mechanism at the corresponding position of the laser welding machine to rise, give way and move, and then reset.

[0010] The auxiliary clamping welding device as described above: the installation mechanism includes a first sliding frame fixedly connected at both ends to the lifting and moving frame and a second sliding frame connected to the first sliding frame;

[0011] A first slide groove is provided on the first slide frame and the second slide frame, a second slide groove is provided on the first slide frame and the second slide frame at the first slide groove position, and a third slide groove is provided on the first slide frame and the second slide frame below the first slide groove;

[0012] Cylinders are installed at both ends of the first sliding frame, the tops of the piston rods of the two cylinders are fixedly connected to the two ends of the second sliding frame respectively, two plug-in rods are fixedly connected at both ends of the second sliding frame, and holes for slidingly plugging with the two plug-in rods are correspondingly arranged at both ends of the first sliding frame.

[0013] The auxiliary clamping welding device as described above: the driving mechanism includes two bidirectional screw rods rotatably connected to the first sliding frame and the second sliding frame respectively, one end of each of the two bidirectional screw rods is fixedly connected to a first bevel gear and a motor connected to the first bevel gear;

[0014] The motor is mounted at one end of the second sliding frame, the output shaft of the motor is coaxially fixedly connected with a transmission shaft, the transmission shaft is slidably connected with two second bevel gears, and the two second bevel gears are respectively meshed with the two first bevel gears;

[0015] The transmission shaft is rotatably connected to a rotating seat arranged on the first sliding frame and the second sliding frame, and the two second bevel gears are respectively rotatably connected with a connecting plate, and the connecting plate is arranged as an angled plate with an angle of ninety degrees. One side of the connecting plate is rotatably connected to the transmission shaft, and the other side of the connecting plate is rotatably connected to the bidirectional screw rod.

[0016] The auxiliary clamping welding device as described above: the positioning mechanism includes a plurality of sliding blocks slidably connected to the third sliding groove, a fixing rod slidably plugged with the sliding blocks, a connecting component arranged at the top of the fixing rod, and an abutting component arranged at the bottom of the fixing rod;

[0017] The sliding block is provided with a plug-in slot, the sliding block is provided with a slotted hole, the slotted hole penetrates the plug-in slot, the fixed rod is slidably plugged into the plug-in slot, the sliding block is rotatably connected with a rotating pin, the rotating pin is fixedly connected with a connecting rod, and the ends of two adjacent connecting rods are rotatably connected;

[0018] The slots on two of the sliding blocks at both ends of the plurality of sliding blocks are formed with internal threads that are threadably connected to the bidirectional lead screw;

[0019] A plug hole is provided on the top of the fixing rod, and a fourth sliding groove is provided on the fixing rod.

[0020] The auxiliary clamping welding device as described above: the connection assembly includes a plug pin slidably inserted into the plug hole and a positioning plate connected to the plug pin;

[0021] One end of the plug pin is slidably connected in the first sliding groove, a movable groove is provided on the plug pin, a spring is arranged in the movable groove, one end of the spring abuts against the plug pin, and the other end of the spring abuts against the positioning plate;

[0022] The positioning plate is slidably connected in the movable groove, and two ends of the positioning plate are fixedly connected to the inner wall of the plug hole.

[0023] The auxiliary clamping welding device as described above: the abutment assembly comprises a connecting column fixedly connected to the center of the bottom of the fixing rod and an abutment head connected to the connecting column;

[0024] A plurality of first adjustment grooves are vertically formed on the outer wall of the connecting column, a second adjustment groove is formed on the connecting column on one side of the plurality of first adjustment grooves, a plurality of through grooves are formed on the connecting column between the plurality of first adjustment grooves and the second adjustment grooves, and the plurality of first adjustment grooves are respectively connected with the second adjustment grooves through the plurality of through grooves;

[0025] A connecting hole is provided on the abutment head, a connecting pin is fixedly connected to the inner wall of the connecting hole, the connecting pin abuts against the first adjustment groove, the second adjustment groove and the through groove respectively, and an anti-slip silicone pad is provided at the bottom of the abutment head.

[0026] The auxiliary clamping welding device as described above: the cyclical yielding mechanism comprises two mounting frames mounted on the lifting and moving frame, the two mounting frames are fixedly connected with a first linkage plate and a second linkage plate connected with the first linkage plate;

[0027] Two connecting grooves are provided on the first linkage plate at the positions of the two mounting frames, and two plug-in boards are symmetrically fixedly connected to the second linkage plate, and the two plug-in boards are correspondingly slidably plugged into the two connecting grooves;

[0028] The bottoms of the first linkage plate and the second linkage plate are fixedly connected with a resistance strip, the opposite surfaces of the first linkage plate and the second linkage plate are provided with guide grooves, the guide grooves are arranged in an inverted V shape, and the bottoms of the opposite surfaces of the first linkage plate and the second linkage plate are fixedly connected with an L-shaped block.

[0029] The auxiliary clamping welding device as described above: the abutment strips on the first linkage plate and the second linkage plate are respectively slidably connected to the second slide grooves provided on the first sliding frame and the second sliding frame, and abutment slopes are provided at both ends of the abutment strips, and the thickness of the abutment strips is greater than the groove depth of the second slide grooves;

[0030] The width of the guide groove is greater than the diameter of the plug pin, the plug pin abuts against the abutment bar, and the L-shaped block abuts against the top edge of the lifting and moving frame in a sliding manner.

[0031] The application of the welding device using the auxiliary clamping as described above in the production of new energy vehicles.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] Through the rationally designed structural combination and connection relationship of the auxiliary clamping structure, when the laser welding machine moves to the welding position during welding of the workpiece, the auxiliary clamping structure at the corresponding position will move out of position to make room for the laser welding machine, so that the laser welding machine can continuously weld the workpiece. When the laser welding machine moves to the next welding position, the auxiliary clamping structure that has moved out of position will reset to achieve the clamping and positioning of the workpiece after welding, thereby preventing the weld of the workpiece from being affected by the residual stress or thermal expansion of the workpiece.

[0034] Specifically, by connecting the circulating giving way mechanism to the laser welding machine and connecting the circulating giving way mechanism to the positioning mechanism on the mounting mechanism, through the descent of the lifting and moving frame, the positioning mechanism can press down and clamp the workpiece on the welding table, so that the joint seam of the workpiece is between the two rows of positioning mechanisms. When the laser welding machine moves to weld the joint seam of the workpiece, due to the sliding of the circulating giving way mechanism on the mounting mechanism and the linkage connection with the positioning mechanism, the positioning mechanism at the corresponding part of the laser welding mechanism can be lifted up and given way, making space for the laser welding machine, so that the laser welding machine can weld the joint seam of the workpiece.

[0035] Then when the laser welding machine moves to the next position for welding, the positioning mechanism at the corresponding position rises and makes way, and the positioning mechanism after the previous rise and makes way is reset under the linkage of the circulating making way mechanism, and the workpiece after welding is pressed down and clamped again to avoid the problem of affecting the weld quality due to the workpiece's own residual stress or thermal expansion after welding. This design ensures that the workpiece is always in a stable state during the entire welding process, which not only improves the welding quality, but also avoids the interference of the auxiliary clamping structure on the moving path of the laser welding machine, thereby realizing continuous and efficient welding operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic diagram of the overall structure of the welding device for auxiliary clamping.

[0037] Figure 2 A schematic diagram of the structure of the welding table in the welding device with auxiliary clamping.

[0038] Figure 3 The schematic diagram of the structure of the auxiliary clamping structure in the auxiliary clamping welding device is shown in FIG.

[0039] Figure 4 The figure is a schematic diagram of the structure of the installation mechanism in the welding device for auxiliary clamping.

[0040] Figure 5 The schematic diagram of the structure of the positioning mechanism in the auxiliary clamping welding device.

[0041] Figure 6 A schematic diagram of the structure of the driving mechanism in the auxiliary clamping welding device.

[0042] Figure 7 It is a schematic structural diagram of the cross-section of the installation mechanism in the auxiliary clamping welding device.

[0043] Figure 8 This is a schematic diagram of the structure of another position of the positioning mechanism in the auxiliary clamping welding device.

[0044] Figure 9 This is a schematic diagram of the exploded structure of the positioning mechanism in the auxiliary clamping welding device.

[0045] Figure 10 A schematic diagram of the structure of the interference component in the auxiliary clamping welding device.

[0046] Figure 11 A schematic diagram of the structure of a cyclical yielding mechanism in a tailor-made welding device for auxiliary clamping.

[0047] Figure 12 Schematic diagram of the structure of the connecting rod and rotating pin in the welding device for auxiliary clamping.

[0048] In the figure: 1, welding table; 2, lifting and moving frame; 3, laser welding machine; 4, first sliding frame; 5, first slide slot; 6, second slide slot; 7, third slide slot; 8, cylinder; 9, second sliding frame; 10, plug rod; 11, two-way screw rod; 12, first bevel gear; 13, second bevel gear; 14, transmission shaft; 15, motor; 16, sliding block; 17, plug slot; 18, slot hole; 19, fixed rod; 20, plug hole; 21, fourth slide slot; 22, connecting column; 23, first adjusting slot; 24, second adjusting slot; 25, through slot; 26, plug pin; 27, movable slot; 28, positioning plate; 29, spring; 30, abutment head; 31, connecting hole; 32, connecting pin; 33, first linkage plate; 34, mounting frame; 35, connecting slot; 36, abutment strip; 37, guide slot; 38, plug plate; 39, second linkage plate; 40, L-shaped block; 41, connecting rod; 42, rotating pin. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0050] See also Figures 1 to 3 In the embodiment of the present invention, the auxiliary clamping welding device comprises a welding table 1, a lifting and moving frame 2 arranged on the welding table 1, and a laser welding machine 3 installed on the lifting and moving frame 2, wherein an auxiliary clamping structure is installed on the lifting and moving frame 2, and the auxiliary clamping structure is connected to the laser welding machine 3;

[0051] The auxiliary clamping structure includes a mounting mechanism mounted on the lifting and moving frame 2, a driving mechanism is provided on the mounting mechanism, a plurality of positioning mechanisms are provided on the driving mechanism, and a circulating yielding mechanism is provided on the mounting mechanism, the positioning mechanism is connected to the mounting mechanism, the circulating yielding mechanism is connected to the plurality of positioning mechanisms, and the circulating yielding mechanism is mounted on the laser welding machine 3;

[0052] When the lifting and moving frame 2 is vertically lifted and adjusted on the welding table 1, it is used to drive the multiple positioning mechanisms to be lifted and adjusted on the welding table 1 to clamp and fix the workpiece placed on the welding table 1. When the laser welding machine 3 is moved and welded on the lifting and moving frame 2, it is used to drive the cyclical giving way mechanism to move on the installation mechanism. When the cyclical giving way mechanism is activated, it is used to drive the positioning mechanism at the corresponding position of the laser welding machine 3 to rise and give way and then reset again.

[0053] In this embodiment, when the lifting and moving frame 2 moves or rises and falls on the welding table 1, it can drive the auxiliary clamping structure to move and adjust synchronously on the welding table 1. When the lifting and moving frame 2 descends on the welding table 1, it can enable multiple positioning mechanisms to press down and clamp the workpiece placed on the welding table 1. The circulating yielding mechanism is connected to the laser welding machine 3. When the laser welding machine 3 moves and adjusts on the lifting and moving frame 2, it can link the circulating yielding mechanism to move on the installation mechanism. When the laser welding machine 3 moves to the welding position of the workpiece, the circulating yielding mechanism will lift the positioning mechanism at the current corresponding position of the laser welding machine 3, so that the positioning mechanism rises and gives way, freeing up the space required for welding for the laser welding machine 3. When the laser welding machine 3 continues to move and weld, it can make multiple positioning mechanisms rise and give way and then reset again, and press down and clamp the welded workpiece, so that the welded workpiece will not be affected by the residual stress in itself or the thermal expansion. The quality of the weld is affected.

[0054] See also Figure 4 , Figure 7 As a further solution of the present invention, the mounting mechanism includes a first sliding frame 4 whose two ends are fixedly connected to the lifting and moving frame 2 and a second sliding frame 9 connected to the first sliding frame 4;

[0055] A first slide groove 5 is provided on each of the first slide frame 4 and the second slide frame 9, a second slide groove 6 is provided on each of the first slide frame 4 and the second slide frame 9 at the location of the first slide groove 5, and a third slide groove 7 is provided on each of the first slide frame 4 and the second slide frame 9 below the first slide groove 5;

[0056] Both ends of the first sliding frame 4 are provided with cylinders 8. The top parts of the piston rods of the two cylinders 8 are respectively fixedly connected to both ends of the second sliding frame 9. Two inserting rods 10 are fixedly connected to both ends of the second sliding frame 9. Holes for slidingly inserting the two inserting rods 10 are correspondingly arranged at both ends of the first sliding frame 4.

[0057] In this embodiment, after the positioning mechanism presses and clamps the workpiece on the welding table 1, the distance between the first sliding frame 4 and the second sliding frame 9 is adjusted by the cylinders 8. At this time, the inserting rods 10 arranged on the second sliding frame 9 are correspondingly inserted into the holes arranged on the first sliding frame 4, which can not only improve the connection stability between the first sliding frame 4 and the second sliding frame 9, but also realize the close fitting of the splicing seam of the workpiece. By adjusting the distance between the first sliding frame 4 and the second sliding frame 9 by the cylinders 8 and cooperating with the sliding insertion of the inserting rods 10 in the holes, the auxiliary clamping structure of this solution can press and clamp and fix the splicing seams of workpieces with different widths, ensuring the firm positioning of the workpiece during welding.

[0058] Please refer to Figure 6 , as a further solution of the present invention, the driving mechanism includes two bidirectional lead screws 11 respectively rotatably connected to the first sliding frame 4 and the second sliding frame 9, first bevel gears 12 fixedly connected to one end of each of the two bidirectional lead screws 11, and a motor 15 connected to the first bevel gears 12;

[0059] The motor 15 is installed at one end of the second sliding frame 9. A transmission shaft 14 is coaxially and fixedly connected to the output shaft of the motor 15. Two second bevel gears 13 are slidably connected to the transmission shaft 14. The two second bevel gears 13 are respectively meshed with the two first bevel gears 12;

[0060] The transmission shaft 14 is rotatably connected to the rotating seats arranged on the first sliding frame 4 and the second sliding frame 9. Connecting plates are respectively rotatably connected to the two second bevel gears 13. The connecting plates are arranged as folding plates with a ninety-degree corner. One side of the connecting plate is rotatably connected to the transmission shaft 14, and the other side of the connecting plate is rotatably connected to the bidirectional lead screw 11.

[0061] In this embodiment, the two bidirectional screw rods 11 on the first sliding frame 4 and the second sliding frame 9 are characterized in that the same screw rod has a left-handed thread and a right-handed thread at the same time, and the left-handed thread and the right-handed thread are symmetrically arranged in the center of the screw rod, so that the threads can move in opposite directions when the screw rod rotates, and the transmission shaft 14 is rotatably connected to the rotating seats set on the first sliding frame 4 and the second sliding frame 9 respectively, and the transmission shaft 14 is connected to two second bevel gears 13 through two connecting plates. When the spacing between the first sliding frame 4 and the second sliding frame 9 is adjusted by the cylinder 8, the second bevel gear 13 at the position of the second sliding frame 9 3 will slide and adjust on the transmission shaft 14. Since a protrusion is provided on the transmission shaft 14 and a groove is correspondingly provided on the inner wall of the second bevel gear 13, after the second bevel gear 13 slides and adjusts on the transmission shaft 14, when the motor 15 drives the transmission shaft 14 to rotate, the transmission shaft 14 can still drive the second bevel gear 13 to rotate, and the second bevel gear 13 is meshed with the first bevel gear 12, so that the bidirectional screw rod 11 rotates. When the bidirectional screw rod 11 rotates, multiple positioning mechanisms can be adjusted to the same spacing on the first sliding frame 4 and the second sliding frame 9, so as to control the combined length of the multiple positioning mechanisms and realize the downward clamping and fixing of workpieces of different sizes.

[0062] See also Figures 8 to 10 As a further solution of the present invention, the positioning mechanism includes a plurality of sliding blocks 16 slidably connected to the third sliding groove 7, a fixing rod 19 slidably plugged with the sliding blocks 16, a connecting component arranged at the top of the fixing rod 19, and an abutting component arranged at the bottom of the fixing rod 19;

[0063] The sliding block 16 is provided with a plug-in slot 17, and a slot hole 18 is provided on the sliding block 16. The slot hole 18 penetrates the plug-in slot 17, and the fixing rod 19 is slidably inserted in the plug-in slot 17. The sliding block 16 is rotatably connected with a rotating pin 42, and a connecting rod 41 is fixedly connected to the rotating pin 42, and the ends of two adjacent connecting rods 41 are rotatably connected;

[0064] The slots 18 on two of the sliding blocks 16 at both ends of the plurality of sliding blocks 16 are formed with internal threads that are threadedly connected to the bidirectional screw rod 11;

[0065] A plug hole 20 is formed at the top of the fixing rod 19 , and a fourth sliding groove 21 is formed on the fixing rod 19 .

[0066] For example, there are 7 sliding blocks 16, which are defined in sequence along the length direction of the bidirectional screw rod 11 as: sliding block A, sliding block B, sliding block C, sliding block D, sliding block E, sliding block F, and sliding block G; sliding block D is located in the middle position of the bidirectional screw rod 11, and sliding block A, sliding block B, and sliding block C are symmetrically arranged along sliding block D with sliding block E, sliding block F, and sliding block G, respectively, and only sliding block A and sliding block G are formed with internal threads.

[0067] When the bidirectional screw 11 rotates, the sliding blocks A, B, C, E, F, and G move toward the sliding block D, or the sliding blocks A, B, C, E, F, and G move away from the sliding block D.

[0068] The connecting assembly includes a plug pin 26 slidably plugged into the plug hole 20 and a positioning plate 28 connected to the plug pin 26;

[0069] One end of the plug pin 26 is slidably connected in the first slide groove 5, and a movable groove 27 is provided on the plug pin 26. A spring 29 is provided in the movable groove 27, and one end of the spring 29 abuts against the plug pin 26, and the other end of the spring 29 abuts against the positioning plate 28;

[0070] The positioning plate 28 is slidably connected in the movable groove 27 , and both ends of the positioning plate 28 are fixedly connected to the inner wall of the plug hole 20 .

[0071] The abutment assembly includes a connection post 22 fixedly connected to the bottom center of the fixing rod 19 and an abutment head 30 connected to the connection post 22;

[0072] A plurality of first adjustment grooves 23 are vertically formed on the outer wall of the connecting column 22, a second adjustment groove 24 is formed on the connecting column 22 on one side of the plurality of first adjustment grooves 23, a plurality of through grooves 25 are formed on the connecting column 22 between the plurality of first adjustment grooves 23 and the second adjustment grooves 24, and the plurality of first adjustment grooves 23 are respectively connected with the second adjustment grooves 24 through the plurality of through grooves 25;

[0073] The abutment head 30 is provided with a connection hole 31 , and a connection pin 32 is fixedly connected to the inner wall of the connection hole 31 . The connection pin 32 abuts against the first adjustment groove 23 , the second adjustment groove 24 and the through groove 25 , respectively. An anti-slip silicone pad is provided at the bottom of the abutment head 30 .

[0074] In this embodiment, the sliding block 16 is slidably connected in the third chute 7. Internal threads are formed on the inner walls of the slot holes 18 formed in the two sliding blocks 16 at both ends of the multiple sliding blocks 16, and the internal threads are threadedly connected to the bidirectional lead screw 11. The slot holes 18 in the remaining sliding blocks 16 are slidably connected to the bidirectional lead screw 11. The connecting rods 41 between adjacent two blocks 16 are cross - misaligned and rotatably connected end to end. A rotating pin 42 is fixedly connected at the central part of the connecting rod 41. The rotating pin 41 is correspondingly rotatably connected to the sliding block 16 and is correspondingly slidably connected in the holes formed in the third chute 7, meeting the adjustment use requirements. A fixing rod 19 is slidably inserted into the insertion slot 17 formed in the sliding block 16. A fourth chute 21 for slidably abutting against the bidirectional lead screw 11 is formed in the fixing rod 19. Therefore, the fixing rod 19 meets the lifting adjustment in the insertion slot 17. The insertion pin 26 is slidably connected in the first chute 5, and the diameter of the insertion pin 26 is larger than the depth of the second chute 6. When the bidirectional lead screw 11 rotates and adjusts, the two sliding blocks 16 threadedly connected to the bidirectional lead screw 11 can slide and adjust in the third chute 7. Due to the connection of the multiple sliding blocks 16 through the connecting rods 41 and the rotating pins 42, the rotational connection between adjacent two connecting rods 41 is the application of the prior art and can achieve equidistant adjustment. Therefore, when the two outermost sliding blocks 16 adjust and move on the bidirectional lead screw 11, the distance between the multiple sliding blocks 16 can be synchronously adjusted, controlling the combined length between the multiple sliding blocks 16 and meeting the clamping use for the splicing seams of workpieces with different lengths. Through the settings of the positioning plate 28 and the spring 29, the insertion pin 26 can stretch and rebound in the insertion hole 20, meeting the adjustment use requirements. An anti - slip silica gel pad is provided at the bottom of the abutting head 30. When the fixing rod 19 is pressed down, the abutting head 30 presses and clamps the workpiece. The anti - slip silica gel pad at the bottom of the abutting head 30 plays an anti - slip effect, which can prevent the workpiece from slipping between the contact surface of the workpiece and the abutting head 30 after the abutting head 30 presses and clamps the workpiece. And when the cylinder 8 adjusts the distance between the first sliding frame 4 and the second sliding frame 9, the anti - slip silica gel pad on the abutting head 30 can drive the two workpieces to approach each other, meeting the use for closely fitting the splicing seam. The abutting head 30 can adjust and move on the connecting column 22. Thus, when the workpiece is of an irregular shape and needs to be pressed and fixed, by rotating the abutting head 30, when the connecting pin 32 in the connecting hole 31 moves from the through - slot 25 to the second adjustment slot 24, the abutting head 30 can be lifted and lowered on the connecting column 22. After adjusting to the required position, rotate the abutting head 30 so that the connecting pin 32 moves to the first adjustment slot 23 at the corresponding position, enabling the connecting pin 32 to be engaged in the first adjustment slot 23, which can meet the position adjustment use of the abutting head 30 on the connecting column 22, thus meeting the pressing and fixing use for irregular workpieces under certain conditions.

[0075] Please refer to Figure 7 、 Figure 11, as a further solution of the present invention, the cyclic yielding mechanism includes two mounting brackets 34 mounted on the lifting and moving frame 2, a first linkage plate 33 fixedly connected to the two mounting brackets 34, and a second linkage plate 39 connected to the first linkage plate 33;

[0076] Two connecting grooves 35 are formed in the first linkage plate 33 at the positions of the two mounting brackets 34. Two plugging plates 38 are symmetrically and fixedly connected to the second linkage plate 39. The two plugging plates 38 are correspondingly and slidably plugged in the two connecting grooves 35;

[0077] Resisting strips 36 are fixedly connected to the bottoms of the first linkage plate 33 and the second linkage plate 39. Guide grooves 37 are formed on the opposite surfaces of the first linkage plate 33 and the second linkage plate 39. The guide grooves 37 are arranged in an inverted V shape. L-shaped blocks 40 are fixedly connected to the bottoms of the opposite surfaces of the first linkage plate 33 and the second linkage plate 39.

[0078] The resisting strips 36 on the first linkage plate 33 and the second linkage plate 39 are respectively and slidably connected in the second sliding grooves 6 formed in the first sliding frame 4 and the second sliding frame 9. The two ends of the resisting strip 36 are provided with resisting slopes. The thickness dimension of the resisting strip 36 is greater than the groove depth of the second sliding groove 6;

[0079] The width dimension of the guide groove 37 is greater than the diameter dimension of the plugging pin 26. The plugging pin 26 abuts against the resisting strip 36. The L-shaped block 40 is slidably abutted against the top edge of the lifting and moving frame 2.

[0080] In this embodiment, the mounting frame 34 is installed on the laser welding machine 3. When the laser welding machine 3 moves, it can drive the mounting frame 34 to move, so that the contact strip 36 moves in the second slide groove 6. Since the thickness of the contact strip 36 is greater than the groove depth of the second slide groove 6, and the two ends of the contact strip 36 are set with slopes, when the contact strip 36 contacts the plug pin 26 in the first slide groove 5, the plug pin 26 will shrink in the plug hole 20. At this time, the spring 29 is squeezed to maintain the rebound force, and the contact strip 36 contacts to make the plug pin 26 move to the guide groove 37. Under the continuous movement of the first linkage plate 33, the plug pin 26 will move along the route of the guide groove 37. When the plug pin 26 moves to the highest point of the guide groove 37, the plug pin 26 will carry the fixing rod 19 to the highest position. At this time, the gun head of the laser welding machine 3 is in the clearance space of the current fixing rod 19 to weld the workpiece. When the first linkage plate 33 continues to move, Since the plug pin 26 is connected to the fixed rod 19, and the fixed rod 19 is slidably plugged on the sliding block 16, the position of the sliding block 16 is kept in position under the restriction of the two-way screw rod 11. Therefore, when the plug pin 26 abuts in the guide slot 37, the fixed rod 19 will be vertically lifted and adjusted to give way to meet the use requirements. When the plug pin 26 passes the highest point of the guide slot 37, the plug pin 26 falls along the guide slot 37, and finally the plug pin 26 will abut against the slope of the abutment strip 36 on the other side of the first linkage plate 33. At this time, the spring 29 in the plug pin 26 rebounds and resets, so that the plug pin 26 abuts against the second slide slot 6 again, and the first sliding frame 4 and the second sliding frame 9 follow the lifting and moving movement of the lifting and moving frame 2. When the first sliding frame 4 and the second sliding frame 9 descend, since the plug pin 26 abuts in the second slide slot 6, the limit use of the plug pin 26 can be realized, so that the fixed rod 19 connected with the plug pin 26 maintains a downward pressure trend, meeting the use requirements;

[0081] It should be noted that the laser welding machine 3 is placed on one side of the first sliding frame 4, and the gun head is tilted. When the fixing rod 19 rises and makes way, the gun head of the laser welding machine 3 can touch the joint seam of the workpiece and perform welding operations on the joint seam. When the laser welding machine 3 moves for continuous welding, it will drive multiple positioning mechanisms to rise and make way and then reset again, and press down and clamp the welded workpiece for fixation. Through this design, the workpiece can be pressed down and clamped to ensure that there will be no deviation at the weld seam during the welding of the workpiece, and the clamping will not affect the continuous welding of the workpiece, so as to achieve the clamping and positioning of the welded workpiece, and avoid the welding quality of the weld seam affected by residual stress or thermal expansion of the welded workpiece.

[0082] The application of the welding device using the auxiliary clamping as described above in the production of new energy vehicles.

[0083] The above embodiments are illustrative and not restrictive. Therefore, all technical solutions of the present invention that can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention are encompassed within the present invention.

Claims

1. An auxiliary clamping welding device, comprising a welding table (1), a lifting and moving frame (2) arranged on the welding table (1), and a laser welding machine (3) installed on the lifting and moving frame (2), characterized in that: An auxiliary clamping structure is installed on the lifting and moving frame (2), and the auxiliary clamping structure is connected to the laser welding machine (3); The auxiliary clamping structure comprises a mounting mechanism mounted on the lifting and moving frame (2), a driving mechanism being arranged on the mounting mechanism, a plurality of positioning mechanisms being arranged on the driving mechanism, and a circulating yielding mechanism being arranged on the mounting mechanism, the positioning mechanism being connected to the mounting mechanism, the circulating yielding mechanism being connected to the plurality of positioning mechanisms, and the circulating yielding mechanism being mounted on the laser welding machine (3); When the lifting and moving frame (2) is vertically lifted and adjusted on the welding table (1), it is used to drive the plurality of positioning mechanisms to be lifted and adjusted on the welding table (1) to clamp and fix the workpiece placed on the welding table (1); when the laser welding machine (3) is moved and welded on the lifting and moving frame (2), it is used to drive the cyclical yielding mechanism to move on the mounting mechanism; when the cyclical yielding mechanism is actuated, it is used to drive the positioning mechanism at the corresponding position of the laser welding machine (3) to rise, yield and move, and then reset again.

2. The auxiliary clamping welding device according to claim 1 is characterized in that: The mounting mechanism comprises a first sliding frame (4) whose two ends are fixedly connected to the lifting and moving frame (2) and a second sliding frame (9) connected to the first sliding frame (4); The first sliding frame (4) and the second sliding frame (9) are both provided with a first sliding groove (5), the first sliding frame (4) and the second sliding frame (9) at the location of the first sliding groove (5) are both provided with a second sliding groove (6), and the first sliding frame (4) and the second sliding frame (9) below the first sliding groove (5) are both provided with a third sliding groove (7); Cylinders (8) are installed at both ends of the first sliding frame (4), and the tops of the piston rods of the two cylinders (8) are respectively fixedly connected to the two ends of the second sliding frame (9), and two plug-in rods (10) are fixedly connected at the two ends of the second sliding frame (9), and holes for slidingly plugging with the two plug-in rods (10) are correspondingly arranged at the two ends of the first sliding frame (4).

3. The auxiliary clamping welding device according to claim 2 is characterized in that: The driving mechanism comprises two bidirectional screw rods (11) rotatably connected to the first sliding frame (4) and the second sliding frame (9), one end of each of the two bidirectional screw rods (11) is fixedly connected to a first bevel gear (12), and a motor (15) connected to the first bevel gear (12); The motor (15) is mounted on one end of the second sliding frame (9); a transmission shaft (14) is coaxially fixedly connected to the output shaft of the motor (15); two second bevel gears (13) are slidably connected to the transmission shaft (14); the two second bevel gears (13) are respectively meshed with the two first bevel gears (12); The transmission shaft (14) is rotatably connected to a rotating seat provided on the first sliding frame (4) and the second sliding frame (9); the two second bevel gears (13) are respectively rotatably connected to a connecting plate, the connecting plate being an angled plate with a 90-degree angle; one side of the connecting plate is rotatably connected to the transmission shaft (14), and the other side of the connecting plate is rotatably connected to the bidirectional screw rod (11).

4. The auxiliary clamping welding device according to claim 2 is characterized in that: The positioning mechanism comprises a plurality of sliding blocks (16) slidably connected in the third sliding groove (7), a fixing rod (19) slidably plugged with the sliding blocks (16), a connecting component arranged at the top of the fixing rod (19), and an abutting component arranged at the bottom of the fixing rod (19); The sliding block (16) is provided with an inserting groove (17), the sliding block (16) is provided with a slot hole (18), the slot hole (18) penetrates the inserting groove (17), the fixing rod (19) is slidably inserted in the inserting groove (17), the sliding block (16) is rotatably connected with a rotating pin (42), the rotating pin (42) is fixedly connected with a connecting rod (41), and the ends of two adjacent connecting rods (41) are rotatably connected; An internal thread which is threadably connected to the bidirectional screw rod (11) is formed in the slots (18) on two of the sliding blocks (16) at both ends of the plurality of sliding blocks (16); A plug hole (20) is provided at the top of the fixing rod (19), and a fourth sliding groove (21) is provided on the fixing rod (19).

5. The auxiliary clamping welding device according to claim 4 is characterized in that: The connection assembly comprises a plug pin (26) slidably plugged into the plug hole (20) and a positioning plate (28) connected to the plug pin (26); One end of the plug pin (26) is slidably connected in the first sliding groove (5), a movable groove (27) is provided on the plug pin (26), a spring (29) is provided in the movable groove (27), one end of the spring (29) abuts against the plug pin (26), and the other end of the spring (29) abuts against the positioning plate (28); The positioning plate (28) is slidably connected in the movable groove (27), and the two ends of the positioning plate (28) are fixedly connected to the inner wall of the plug hole (20).

6. The auxiliary clamping welding device according to claim 4, characterized in that: The abutment assembly comprises a connection column (22) fixedly connected to the center of the bottom of the fixing rod (19) and a abutment head (30) connected to the connection column (22); A plurality of first adjustment grooves (23) are vertically provided on the outer wall of the connecting column (22); a second adjustment groove (24) is provided on the connecting column (22) on one side of the plurality of first adjustment grooves (23); a plurality of through grooves (25) are provided on the connecting column (22) between the plurality of first adjustment grooves (23) and the second adjustment grooves (24); the plurality of first adjustment grooves (23) are respectively connected to the second adjustment grooves (24) through the plurality of through grooves (25); The abutment head (30) is provided with a connection hole (31), the inner wall of the connection hole (31) is fixedly connected with a connection pin (32), the connection pin (32) is respectively in contact with the first adjustment groove (23), the second adjustment groove (24) and the through groove (25), and the bottom of the abutment head (30) is provided with an anti-slip silicone pad.

7. The auxiliary clamping welding device according to claim 5, characterized in that: The cyclical yielding mechanism comprises two mounting frames (34) mounted on the lifting and moving frame (2), a first linkage plate (33) fixedly connected to the two mounting frames (34), and a second linkage plate (39) connected to the first linkage plate (33); The first linkage plate (33) is provided with two connection grooves (35) at the locations of the two mounting frames (34); the second linkage plate (39) is symmetrically fixedly connected with two plug-in plates (38); the two plug-in plates (38) are correspondingly slidably plugged into the two connection grooves (35); The bottoms of the first linkage plate (33) and the second linkage plate (39) are both fixedly connected with a resistance strip (36); the opposing surfaces of the first linkage plate (33) and the second linkage plate (39) are both provided with a guide groove (37); the guide groove (37) is arranged in an inverted V shape; the bottoms of the opposing surfaces of the first linkage plate (33) and the second linkage plate (39) are both fixedly connected with an L-shaped block (40).

8. The auxiliary clamping welding device according to claim 7, characterized in that: The abutment strips (36) on the first linkage plate (33) and the second linkage plate (39) are respectively slidably connected to the second slide grooves (6) provided on the first sliding frame (4) and the second sliding frame (9), and abutment slopes are provided at both ends of the abutment strips (36), and the thickness of the abutment strips (36) is greater than the groove depth of the second slide groove (6); The width of the guide groove (37) is greater than the diameter of the plug pin (26), the plug pin (26) is in contact with the abutment strip (36), and the L-shaped block (40) is in sliding contact with the top edge of the lifting and moving frame (2).

9. Application of the welding device with auxiliary clamping as described in any one of claims 1 to 8 in the production of new energy vehicles.

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