Automatic welding tool for automobile multi-color grating decorating part

Abstract

The invention discloses an automatic welding tool for automobile multi-color grating decorating parts. The automatic welding tool comprises a workbench, and a plurality of supporting rods are fixedly connected to the top of the workbench; the device further comprises a welding table and a welding pressing plate. According to the automatic welding tool for the automobile multi-color grating decorating part, a grating is placed on a forming rod, a hydraulic cylinder is driven to push a welding pressing plate to move downwards, so that all pressing rods are attached to the grating, an unlocking part is pushed to rotate to drive a first clamping part to rotate to clamp all the pressing rods, and then the grating decorating part is automatically welded. And the liquid welding pressing plate is continuously pushed to move downwards, the grids are pushed to move downwards, so that the forming rod moves downwards to be attached to the grids, self-adaptive attachment limiting of different grids is achieved, the driving piece is driven to rotate after the forming rod moves downwards, the second clamping piece is made to clamp the forming rod, meanwhile, the driving piece drives the unlocking piece to unlock the first clamping piece, and then the forming rod is clamped. And the welding pressing plate continues to move downwards to conduct welding treatment on the grating through the welding assembly.

Description

Technical Field

[0001] The invention relates to the technical field of automobile exterior component assembly, and in particular to an automatic welding tool for automobile multi-color grille decorative parts. Background Art

[0002] The car grille is an important part of the car. It is located at the front of the car. Its main function is to provide air intake and ventilation for the water tank, engine and air conditioner, and to prevent foreign objects from damaging the internal parts of the car during driving. The grille not only has practical functions, but is also an important part of the car's appearance. The car grille mainly uses aviation aluminum as the base material, which is lighter than traditional stainless steel base materials and has good corrosion resistance and high strength. The design of the grille also takes aerodynamics into consideration to reduce wind resistance and improve the driving efficiency of the car.

[0003] During the production process of automobile grilles, they need to be welded, usually by ultrasonic welding. During welding, the grille is placed on a base that matches the grille, and is placed under the ultrasonic welding weld. The weld is moved down until it contacts the grille and then welded. During welding, since grilles of different brands and models have different sizes, different methods of fixing the grilles are required when fixing different grilles. Otherwise, welding dislocation is likely to occur, affecting the stability and strength of the grille. The base needs to be replaced each time the grille is replaced, which is complicated to operate and inconvenient to use, reducing the efficiency of welding. Summary of the invention

[0004] The object of the present invention is to provide an automatic welding tool for automobile multi-color grille decorative parts to solve the above-mentioned deficiencies in the prior art.

[0005] In order to achieve the above-mentioned object, the present invention provides the following technical solution: comprising a workbench, a top of which is fixedly connected with a plurality of support rods; It also includes a welding platform and a welding platen, wherein the welding platen is slidably arranged outside each of the support rods, the welding platform is fixed outside each of the support rods, and the welding platform is located between the workbench and the welding platen, a plurality of welding assemblies are arranged at the bottom of the welding platen, a pressure rod is slidably arranged on the welding platen, and a plurality of forming rods are slidably arranged on the welding platform; There are two strokes in the process of the welding platen moving downward. In the first stroke, the welding platen moves downward to drive the pressure rod to move downward and contact the grid, and the multiple pressure rods are clamped and positioned by multiple first clamping members. In the second stroke, the welding platen moves downward to drive the grid to move so that the multiple forming rods move downward to adapt to different types of grids. It also includes a plurality of second clamping members. After the forming rod at the central position moves down to the lowest position, the plurality of second clamping members are driven to clamp each forming rod and unlock the first clamping member for welding the assembly welding grid.

[0006] As a further description of the above technical solution: The first clamping member includes a first fixed rod fixed on the welding pressure plate, two first clamping plates are rotatably connected to the first fixed rod, two first limit plates are fixedly connected to the first fixed rod, and two first torsion springs are arranged on the outer sleeve of the first fixed rod, the two ends of the first torsion spring are respectively fixedly connected to the first limit plate and the first clamping plate, a first connecting rope is fixedly connected to the first clamping plate, and the first limit rod is fixedly connected to the welding pressure plate.

[0007] As a further description of the above technical solution: It also includes two unlocking members, which drive each unlocking member to rotate after the pressure rod moves downward so that the first clamping member clamps the pressure rod. The unlocking member includes a rotating rod slidably set outside the welding pressure plate, and the rotating rod is slidably connected to the first sprocket outside, and a winding wheel is slidably set outside the rotating rod, and each first connecting rope located on one side is bypassed by the limiting rod and fixedly connected to the outside of the winding wheel.

[0008] As a further description of the above technical solution: It also includes a hydraulic cylinder, the output end of which is fixedly connected to the welding platen, a rotating drum is provided on the outer sleeve of the output end of the hydraulic cylinder, and a second sprocket is fixedly connected to the top end of the rotating drum; It also includes a first chain, which is drivingly engaged with each of the first sprocket and the second sprocket.

[0009] As a further description of the above technical solution: An L-shaped rod is slidably arranged inside the pressure rod at the center, and the L-shaped rod extends outside the pressure rod and into the rotating drum. A first spiral groove matched with the L-shaped rod is clamped in the rotating drum.

[0010] As a further description of the above technical solution: The second clamping member includes a second fixed rod fixed to the bottom of the welding table, two second clamping plates are rotatably connected to the outside of the second fixed rod, and two second limit plates are fixedly connected to the outside of the second fixed rod, two second torsion springs are arranged outside the second fixed rod, and the two ends of the second torsion spring are respectively fixedly connected to the second limit plate and the second clamping plate, and the bottom of the welding table is fixedly connected to the second limit rod.

[0011] As a further description of the above technical solution: It also includes two driving members for unlocking each second clamping member, and the driving member includes a rotating tube rotatably arranged on one side of the welding table, the rotating tube is fixedly connected to a rope winding wheel outside, the second clamping plate is fixedly connected to a second connecting rope outside, the second connecting rope passes around the second limiting rod and is fixedly connected to the rope winding wheel, and the bottom end of the rotating tube is fixedly connected to a third sprocket.

[0012] As a further description of the above technical solution: A rectangular block is fixedly connected to the bottom end of the forming rod at the center, a connecting pipe adapted to the rectangular block is rotatably connected to the workbench, the rectangular block is slidably arranged in the connecting pipe, and a fourth sprocket is fixedly connected to the outside of the connecting pipe; It also includes a second chain, which is drivingly engaged with the fourth sprocket and each of the third sprockets.

[0013] As a further description of the above technical solution: A guide block is fixedly connected inside the welding table, and the guide block extends into a forming rod located at the center. A second spiral groove adapted to the guide block is provided outside the forming rod. A fixing plate is fixedly connected outside each forming rod, and a support spring is sleeved outside each forming rod.

[0014] As a further description of the above technical solution: The welding assembly includes a flexible welding head arranged at the bottom of the welding pressure plate, a disc is fixedly connected to the outside of the flexible welding head, a plurality of guide tubes are fixedly connected to the bottom of the disc, a guide rod is slidably arranged inside the guide tube, a tension spring is fixedly connected inside the guide tube, and the tension spring is fixedly connected to the guide rod.

[0015] In the above technical solution, the automatic welding tool for multi-color grille decorative parts of automobiles provided by the present invention has the beneficial effects of: The present invention places the grille on the forming rod, drives the hydraulic cylinder to push the welding pressure plate to move downward, so that each pressure rod is fitted with the grille, pushes the unlocking piece to rotate and drives the first clamping piece to rotate to clamp each pressure rod, continues to push the liquid welding pressure plate downward, pushes the grille downward, so that the forming rod moves downward and fits the grille, and realizes adaptive fitting and limiting of different grilles, drives the driving piece to rotate after the forming rod moves downward, so that the second clamping piece clamps the forming rod, and at the same time the driving piece drives the unlocking piece to unlock the first clamping piece, and continues to move the welding pressure plate downward to weld the grille through the welding assembly, so as to realize adaptive limiting and fixing of grilles of different specifications.

[0016] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0017] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 A schematic diagram of a three-dimensional structure provided by an embodiment of the present invention; Figure 2 The embodiment of the present invention provides Figure 1 An enlarged view of point A is shown; Figure 3 A bottom view structural schematic diagram of a welding pressure plate provided in an embodiment of the present invention; Figure 4 The embodiment of the present invention provides Figure 3 An enlarged view of point B is shown; Figure 5 A schematic diagram of the three-dimensional structure of a rotating rod provided in an embodiment of the present invention; Figure 6 A schematic diagram of the three-dimensional structure of a rotating tube provided in an embodiment of the present invention; Figure 7 A schematic diagram of the partial structure of the pressure rod and the first clamping member provided in an embodiment of the present invention; Figure 8 A schematic diagram of a partial three-dimensional structure of a pressure rod and an unlocking member provided in an embodiment of the present invention; Fig. 9 A schematic diagram of the partial structure of the forming rod and the second clamping member provided in an embodiment of the present invention; Fig.10 A schematic diagram of the partial structure of a forming rod and a driving member provided in an embodiment of the present invention; Fig.11 A schematic diagram of the partial structure of a forming rod provided in an embodiment of the present invention.

[0020] Description of reference numerals: 1. Workbench; 11. Support rod; 2. Welding table; 21. Forming rod; 22. Guide block; 23. Second spiral groove; 24. Fixed plate; 3. Welding pressure plate; 31. Pressure rod; 41. First fixed rod; 42. First clamping plate; 43. First limit plate; 44. First torsion spring; 45. First connecting rope; 46. First limit rod; 51. Rotating rod; 52. First sprocket; 53. Winding wheel; 54. Rotating drum; 55. Second sprocket; 56. First chain; 57. L-shaped Rod; 58, first spiral groove; 6, hydraulic cylinder; 71, second fixed rod; 72, second clamping plate; 73, second limit plate; 74, second torsion spring; 75, second connecting rope; 76, second limit rod; 81, rotating tube; 82, rope wheel; 83, third sprocket; 84, rectangular block; 85, connecting tube; 86, fourth sprocket; 87, second chain; 88, supporting spring; 91, flexible welding head; 92, disc; 93, guide tube; 94, guide rod; 95, tension spring. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure. See also Figure 1-Figure 11The present embodiment provides an automatic welding tool for automobile multi-color grille decorative parts, comprising a workbench 1, a plurality of support rods 11 are fixedly connected to the top of the workbench 1; a welding platform 2 and a welding platen 3, the welding platen 3 is slidably arranged outside each support rod 11, the welding platform 2 is fixed outside each support rod 11, and the welding platform 2 is located between the workbench 1 and the welding platen 3, a plurality of welding assemblies are arranged at the bottom of the welding platen 3, a pressure rod 31 is slidably arranged on the welding platen 3, and a plurality of forming rods 21 are slidably arranged on the welding platform 2; there are two strokes in the downward movement process of the welding platen 3, in the first stroke, the welding platen 3 moves downward to drive the pressure rod 31 to move downward and contact with the grille, and the plurality of pressure rods 31 are clamped and positioned by a plurality of first clamping members, and in the second stroke, the welding platen 3 moves downward to drive the grille to move, so that the plurality of forming rods 21 move downward to adapt to different models of grilles; it also comprises The invention comprises a plurality of second clamping members. After the forming rod 21 located at the central position moves down to the lowest point, the plurality of second clamping members are driven to clamp each forming rod 21, and the first clamping member is unlocked for use in welding the grid of the welding assembly. By placing the grid on the forming rod 21, the hydraulic cylinder 6 is driven to push the welding platen 3 to move downward, so that each pressure rod 31 is fitted with the grid, the unlocking member is pushed to rotate and drive the first clamping member to rotate to clamp each pressure rod 31, and the liquid welding platen 3 is continued to move downward, and the grid is pushed downward, so that the forming rod 21 moves down and fits the grid, so as to realize adaptive fitting limit for different grids. After the forming rod 21 moves down, the driving member is driven to rotate, so that the second clamping member clamps the forming rod 21, and at the same time, the driving member drives the unlocking member to unlock the first clamping member, and the welding platen 3 is continued to move downward to weld the grid through the welding assembly, so as to realize adaptive limit and fixation of grids of different specifications.

[0022] In an embodiment further provided by the present invention, the first clamping member includes a first fixed rod 41 fixed on the welding pressure plate 3, two first clamping plates 42 are rotatably connected to the first fixed rod 41, two first limiting plates 43 are fixedly connected to the first fixed rod 41, and two first torsion springs 44 are arranged on the outer sleeve of the first fixed rod 41, and the two ends of the first torsion spring 44 are respectively fixedly connected to the first limiting plates 43 and the first clamping plates 42, a first connecting rope 45 is fixedly connected to the first clamping plate 42, and a first limiting rod 46 is fixedly connected to the welding pressure plate 3, the two first clamping plates 42 are both arranged in an arc shape and are adapted to each other, and the first clamping plates 42 are adapted to the pressure rod 31, and the first clamping plates 42 are in an open state under normal conditions. After the first connecting rope 45 pulls the first clamping plates 42 to rotate, the two first clamping plates 42 are close to each other to clamp and limit the pressure rod 31.

[0023] Furthermore, it also includes two unlocking members, which drive each unlocking member to rotate after the pressure rod 31 moves downward, so that the first clamping member clamps the pressure rod 31, and the unlocking member includes a rotating rod 51 slidably arranged outside the welding pressure plate 3, and the first sprocket 52 is slidably connected to the outside of the rotating rod 51, and a winding wheel 53 is slidably arranged outside the rotating rod 51, and each first connecting rope 45 located on one side bypasses the limiting rod and is fixedly connected to the outside of the winding wheel 53, and multiple first connecting ropes 45 are fixed to the outside of the winding wheel 53 and rotate in the same direction. When the winding wheel 53 rotates, multiple first connecting ropes 45 are wound up at the same time, so that the first clamping plate 42 rotates to clamp and limit the pressure rod 31, and the winding wheel 53 and the first sprocket 52 are both rotatably arranged outside the welding pressure plate 3, and a protrusion is arranged outside the rotating rod 51, and the protrusion on the rotating rod 51 is in active contact with the winding wheel 53 (such as Figure 5 as shown).

[0024] Furthermore, it also includes a hydraulic cylinder 6, the output end of the hydraulic cylinder 6 is fixedly connected to the welding pressure plate 3, and the outer sleeve of the output end of the hydraulic cylinder 6 is provided with a rotating drum 54, and the top of the rotating drum 54 is fixedly connected to the second sprocket 55; it also includes a first chain 56, the first chain 56 is transmission-engaged with each first sprocket 52 and the second sprocket 55, the wheel diameter of the first sprocket 52 is smaller than the wheel diameter of the second sprocket 55, when the first chain 56 connects the first sprocket 52 and the second sprocket 55, it is ensured that the first sprocket 52 is in a tensioned state and is always engaged with the first sprocket 52 and the second sprocket 55, and the rotating drum 54 is rotatably connected to the welding pressure plate 3 to limit the rotating drum 54.

[0025] Specifically, an L-shaped rod 57 is slidably disposed in the pressure rod 31 at the center. The L-shaped rod 57 extends outside the pressure rod 31 and into the rotating drum 54 . A first spiral groove 58 matched with the L-shaped rod 57 is disposed in the rotating drum 54 .

[0026] In an embodiment further provided by the present invention, the second clamping member includes a second fixing rod 71 fixed to the bottom of the welding table 2, the second fixing rod 71 is rotatably connected to two second clamping plates 72 outside, and the second fixing rod 71 is fixedly connected to two second limiting plates 73 outside, and the second fixing rod 71 is provided with two second torsion springs 74 outside the second fixing rod 71, and the two ends of the second torsion spring 74 are respectively fixedly connected to the second limiting plates 73 and the second clamping plates 72, and the bottom of the welding table 2 is fixedly connected to a second limiting rod 76, the two second clamping plates 72 are both arranged in an arc shape and adapted to each other, and the second clamping plates 72 are adapted to the forming rod 21, and the second clamping plates 72 are in an open state under normal conditions. After the second connecting rope 75 pulls the second clamping plates 72 to rotate, the two second clamping plates 72 are close to each other to clamp and limit the forming rod 21.

[0027] Furthermore, two driving members are included to unlock each second clamping member. The driving member includes a rotating tube 81 rotatably arranged on one side of the welding table 2. The rotating tube 81 is fixedly connected to a rope winding wheel 82. The second clamping plate 72 is fixedly connected to a second connecting rope 75. The second connecting rope 75 passes around the second limiting rod 76 and is fixedly connected to the rope winding wheel 82. The bottom end of the rotating tube 81 is fixedly connected to a third sprocket 83. The rotating tube 81 is adapted to the rotating rod 51. The rotating rod 51 is arranged in a rectangular shape. The tube 81 rotates to drive the rope pulley 82 to reel in so that the second clamping piece clamps the forming rod 21 and drives the rotating rod 51 to rotate, so that the first clamping piece is unlocked. The middle section of the rotating rod 51 is set in a columnar shape. After the rotating rod 51 moves to the bottom of the rotating tube 81, it continues to push the welding pressure plate 3 to move, and the rotating rod 51 will slide in the welding pressure plate 3, so that the column of the rotating rod 51 moves to the first sprocket 52. When the rotating tube 81 rotates to drive the rotating rod 51 to reverse, the first sprocket 52 is not driven to rotate.

[0028] Furthermore, a rectangular block 84 is fixedly connected to the bottom end of the forming rod 21 at the center, a connecting pipe 85 adapted to the rectangular block 84 is rotatably connected to the workbench 1, the rectangular block 84 is slidably arranged in the connecting pipe 85, and a fourth sprocket 86 is fixedly connected to the outside of the connecting pipe 85; It also includes a second chain 87, which is in transmission engagement with the fourth sprocket 86 and each third sprocket 83. A protrusion is provided outside the forming rod 21 located at the center. After the forming rod 21 moves to the protrusion, the forming rod 21 is limited. The height of the forming rod 21 located above the welding table 2 is greater than the height of the grille, and the number of the forming rods 21 is greater than the size of the grille. After the forming rod 21 moves downward until the protrusion contacts the welding table 2, the grille moves into the forming rod 21 to form a concave shape, thereby limiting and fixing the grille and ensuring that all sides of the grille are supported.

[0029] Specifically, a guide block 22 is fixedly connected inside the welding table 2, and the guide block 22 extends into the forming rod 21 located at the center. A second spiral groove 23 adapted to the guide block 22 is provided outside the forming rod 21. A fixing plate 24 is fixedly connected to the outside of each forming rod 21, and a supporting spring 88 is sleeved outside each forming rod 21. The second spiral groove 23 is composed of a straight groove and a spiral groove. The second spiral groove 23 moves by moving the forming rod 21 downward. When the spiral groove moves to the guide block 22, the forming rod 21 is driven to rotate by the guide block 22, and the rectangular block 84 is driven to rotate synchronously, thereby realizing the rotation of the connecting tube 85.

[0030] In the embodiment provided by the present invention, the welding assembly includes a flexible welding head 91 arranged at the bottom of the welding pressure plate 3, the flexible welding head 91 is fixedly connected to a disc 92 on the outside, a plurality of guide tubes 93 are fixedly connected to the bottom of the disc 92, a guide rod 94 is slidably arranged in the guide tube 93, a tension spring 95 is fixedly connected in the guide tube 93, and the tension spring 95 is fixedly connected to the guide rod 94. When the flexible welding head 91 moves downward, the guide rod 94 first contacts the grid, and then drives the disc 92 to rotate, so that the disc 92 is parallel to the grid, and then the flexible welding platform 2 continues to move downward, so that the flexible welding platform 2 is perpendicular to the grid, thereby ensuring the stability of the welding.

[0031] Working principle: When in use, place the grille on the forming rod 21, and then drive the hydraulic cylinder 6 to move downward, the hydraulic cylinder 6 drives the welding pressure plate 3 to move downward, so that the pressure rods 31 move downward, until all the pressure rods 31 are in contact with the grille, at this time, after the pressure rod 31 at the center position is in contact with the grille, the L-shaped rod 57 is pushed upward to drive the rotating drum 54 to rotate, thereby driving the second sprocket 55 to rotate synchronously, and driving the first sprocket 52 to rotate synchronously through the chain, so that the rotating rod 51 rotates, driving the winding wheel 53 to rotate, and winding the first connecting rope 45, and then pulling the two first clamping plates 42 to rotate on the first fixed rod 41 and approach each other, so as to clamp and limit the pressure rod 31; The welding platen 3 is driven to continue to move downward. Since the pressure rod 31 is fixed, the pressure rod 31 continues to move downward to push the grid to move downward synchronously, so that the forming rod 21 moves downward synchronously, so that the support spring 88 is compressed, and at the same time the rotating rod 51 moves into the rotating tube 81. When the protrusion of the forming rod 21 moves to contact the welding table 2, the second spiral groove 23 moves synchronously during the downward movement of the welding table 2 at the center. When the spiral groove of the second spiral groove 23 moves to the guide block 22, under the action of the guide block 22, the forming rod 21 is driven to rotate, so that the rectangular block 84 rotates synchronously, thereby driving the connecting tube 85 to rotate synchronously, driving the fourth sprocket 86 to rotate, and driving the third sprocket 83 to rotate through the second chain 87, so that the rotating tube 81 rotates; When the rotating tube 81 rotates, it drives the rope wheel 82 to rotate, and the rope wheel 82 reels the second connecting rope 75, so that the second clamping plate 72 rotates to clamp the forming rod 21. At the same time, the rotating tube 81 rotates to drive the rotating rod 51 to reverse, so that the rotating rod 51 rotates to release the first reel 53, and the first clamping plate 42 is driven to rotate away from the pressure rod 31 through the first torsion spring 44, so as to unlock the pressure rod 31. The welding platen 3 continues to move downward to drive the flexible welding head 91 downward. When the guide rod 94 contacts the grid on the inclined surface, the disc 92 rotates until all the guide rods 94 contact the grid, so that the flexible welding platform 2 is perpendicular to the grid, and then continues to move downward to drive the flexible welding head 91 to contact the grid to achieve welding.

[0032] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An automatic welding tool for multi-color grille decorative parts of an automobile, comprising a workbench (1), characterized in that: A plurality of support rods (11) are fixedly connected to the top of the workbench (1); It also comprises a welding platform (2) and a welding pressure plate (3), wherein the welding pressure plate (3) is slidably arranged outside each of the support rods (11), the welding platform (2) is fixed outside each of the support rods (11), and the welding platform (2) is located between the workbench (1) and the welding pressure plate (3), a plurality of welding assemblies are arranged at the bottom of the welding pressure plate (3), a pressure rod (31) is slidably arranged on the welding pressure plate (3), and a plurality of forming rods (21) are slidably arranged on the welding platform (2); There are two strokes in the process of the welding pressure plate (3) moving downward. In the first stroke, the welding pressure plate (3) moves downward to drive the pressure rod (31) to move downward and contact the grid, and the plurality of pressure rods (31) are clamped and positioned by the plurality of first clamping members. In the second stroke, the welding pressure plate (3) moves downward to drive the grid to move, so that the plurality of forming rods (21) move downward, so as to adapt to grids of different models. It also comprises a plurality of second clamping members, which drive the plurality of second clamping members to clamp each of the forming rods (21) and unlock the first clamping members after the forming rod (21) located at the central position moves down to the lowest position, so as to be used for welding the assembly welding grid.

2. The automatic welding tool for multi-color grille decoration of automobile according to claim 1, characterized in that: The first clamping member comprises a first fixing rod (41) fixed to the welding pressure plate (3), two first clamping plates (42) being rotatably connected to the first fixing rod (41), two first limiting plates (43) being fixedly connected to the first fixing rod (41), and two first torsion springs (44) being provided on the outer sleeve of the first fixing rod (41), two ends of the first torsion spring (44) being respectively fixedly connected to the first limiting plates (43) and the first clamping plates (42), a first connecting rope (45) being fixedly connected to the first clamping plates (42), and a first limiting rod (46) being fixedly connected to the welding pressure plate (3).

3. The automatic welding tool for multi-color grille decoration of automobile according to claim 2, characterized in that: It also includes two unlocking members, which are driven to rotate after the pressure rod (31) moves downward, so that the first clamping member clamps the pressure rod (31), and the unlocking member includes a rotating rod (51) slidably arranged outside the welding pressure plate (3), and the rotating rod (51) is slidably connected to a first sprocket (52), and a winding wheel (53) is slidably arranged outside the rotating rod (51), and each first connecting rope (45) located on one side bypasses the limit rod and is fixedly connected to the outside of the winding wheel (53).

4. The automatic welding tool for automobile multi-color grille decoration according to claim 3, characterized in that: It also comprises a hydraulic cylinder (6), the output end of the hydraulic cylinder (6) being fixedly connected to the welding pressure plate (3), the outer sleeve of the output end of the hydraulic cylinder (6) being provided with a rotating drum (54), the top end of the rotating drum (54) being fixedly connected to a second sprocket (55); It also includes a first chain (56), wherein the first chain (56) is in driving engagement with the first sprocket (52) and the second sprocket (55).

5. The automatic welding tool for multi-color grille decoration of automobile according to claim 4, characterized in that: An L-shaped rod (57) is slidably disposed inside the pressure rod (31) located at the center. The L-shaped rod (57) extends outside the pressure rod (31) and into the rotating drum (54). A first spiral groove (58) adapted to the L-shaped rod (57) is disposed inside the rotating drum (54).

6. The automatic welding tool for multi-color grille decoration of automobile according to claim 1, characterized in that: The second clamping member comprises a second fixing rod (71) fixed to the bottom of the welding platform (2); the second fixing rod (71) is rotatably connected to two second clamping plates (72) outside, and the second fixing rod (71) is fixedly connected to two second limiting plates (73) outside, the second fixing rod (71) is provided with two second torsion springs (74) outside, the two ends of the second torsion spring (74) are respectively fixedly connected to the second limiting plates (73) and the second clamping plates (72); the bottom of the welding platform (2) is fixedly connected to the second limiting rod (76).

7. The automatic welding tool for multi-color grille decoration of automobile according to claim 6, characterized in that: The invention also comprises two driving members for unlocking each second clamping member, the driving member comprising a rotating tube (81) rotatably arranged on one side of the welding table (2), the rotating tube (81) being fixedly connected to a rope winding wheel (82) on the outside, the second clamping plate (72) being fixedly connected to a second connecting rope (75) on the outside, the second connecting rope (75) passing around the second limiting rod (76) and being fixedly connected to the rope winding wheel (82), and the bottom end of the rotating tube (81) being fixedly connected to a third sprocket (83).

8. The automatic welding tool for multi-color grille decoration of automobile according to claim 7, characterized in that: A rectangular block (84) is fixedly connected to the bottom end of the forming rod (21) located at the center, a connecting pipe (85) adapted to the rectangular block (84) is rotatably connected to the workbench (1), the rectangular block (84) is slidably arranged in the connecting pipe (85), and a fourth sprocket (86) is fixedly connected to the outside of the connecting pipe (85); It also includes a second chain (87), wherein the second chain (87) is in driving engagement with the fourth sprocket (86) and each of the third sprockets (83).

9. The automatic welding tool for automobile multi-color grille decoration according to claim 8, characterized in that: A guide block (22) is fixedly connected inside the welding table (2), the guide block (22) extends into a forming rod (21) located at the center, a second spiral groove (23) adapted to the guide block (22) is formed outside the forming rod (21), a fixing plate (24) is fixedly connected outside each forming rod (21), and a support spring (88) is sleeved outside each forming rod (21).

10. The automatic welding tool for automobile multi-color grille decoration according to claim 1, characterized in that: The welding assembly comprises a flexible welding head (91) arranged at the bottom of the welding pressure plate (3); a circular disc (92) is fixedly connected to the outside of the flexible welding head (91); a plurality of guide tubes (93) are fixedly connected to the bottom of the circular disc (92); a guide rod (94) is slidably arranged inside the guide tube (93); a tension spring (95) is fixedly connected inside the guide tube (93); and the tension spring (95) is fixedly connected to the guide rod (94).

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