Special clamping mechanism for spot welding test piece

Abstract

The utility model relates to the technical field of stamping part test piece welding, in particular to a special clamping mechanism for a spot welding test piece, which comprises a manual clamp device, an upper U-shaped clamping device, a lower U-shaped clamping device, a support base, a welding test piece, an upper clamping device and a lower clamping device. According to the test piece welding robot, the test pieces are arranged on the upper clamping block and the lower clamping block, then the manual clamp is manually operated to clamp the test pieces, then welding pliers are used for welding, the upper clamping block and the lower clamping block are made of polyurethane materials and have certain compression amount, the test pieces with different thicknesses ranging from 1 mm to 4 mm can be clamped, and after clamping, the welding robot can weld the three sets of test pieces according to a preset welding program. Compared with the prior art, the welding device has the advantages of being wide in application range, high in safety, good in structural reliability, simple in structure and convenient to use, welding test pieces are loaded and clamped through the arranged special clamping mechanism, the danger of manual operation is reduced, the welding efficiency is improved, and the test pieces are attached stably.

Description

Technical Field

[0001] The utility model relates to the technical field of stamping part test piece welding, in particular to a special clamping mechanism for spot welding test pieces. Background Technique

[0002] At present, for the automatic spot welding robot workstation, in order to ensure the stability of the resistance spot welding strength, it is necessary to use the spot welding robot to call the parameters during production to weld test pieces with the same thickness and material according to the sheet thickness of all product parts before production. After the robot finishes welding the test pieces, the operator manually conducts strength analysis such as tensile tests on the test pieces, and adjusts the welding parameters according to the experimental analysis results to ensure the stability of the welding strength.

[0003] When welding test pieces, one operator needs to hold a set of test pieces by hand, and another operator operates the spot welding robot to move to the position of the test piece group for welding. The operation is relatively dangerous, with low efficiency, unstable fitting of the test pieces, and it affects the accuracy of strength analysis such as tensile tests. Therefore, a special clamping mechanism for spot welding test pieces is proposed to solve the above problems. Content of the Utility Model

[0004] The purpose of the utility model is to provide a special clamping mechanism for spot welding test pieces, so as to solve the problems that when welding test pieces, one operator needs to hold a set of test pieces by hand, and another operator operates the spot welding robot to move to the position of the test piece group for welding, the operation is relatively dangerous, with low efficiency, unstable fitting of the test pieces, and it affects the accuracy of strength analysis such as tensile tests as mentioned in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A special clamping mechanism for spot welding test pieces, comprising a manual clamping device, an upper U-shaped clamping device, a lower U-shaped clamping device, a bracket base, a welding test piece, an upper clamping device and a lower clamping device, wherein the upper U-shaped clamping device and the lower U-shaped clamping device are arranged at the rear end of the manual clamping device, the bracket base is arranged at the bottom of the lower U-shaped clamping device, the upper clamping device is arranged on the inner side of the upper U-shaped clamping device, the lower clamping device is arranged on the inner side of the lower U-shaped clamping device, and a welding test piece is arranged between the upper clamping device and the lower clamping device, the manual clamping device comprises a fixed plate, a plug-in board, a pressure plate, an assembly part, an assembly stud, an operating rod and a positioning pin shaft, the plug-in board is fixedly arranged on the top of the fixed plate, the left and right ends of the plug-in board are in contact with the pressure plate, the end of the pressure plate away from the plug-in board is in contact with the assembly part, and the plug-in The plate, the pressure plate and the assembly parts are assembled by assembly studs, and operating rods are arranged inside the assembly parts on the left and right sides. The upper U-shaped clamping device comprises a first U-shaped clamping frame, a second U-shaped clamping frame and a connecting plate, a second U-shaped clamping frame is arranged on the top of the first U-shaped clamping frame, and a connecting plate is fixedly arranged between the first U-shaped clamping frame and the second U-shaped clamping frame, and the lower U-shaped clamping device comprises a third U-shaped clamping frame and a fourth U-shaped clamping frame, and a fourth U-shaped clamping frame is arranged at the bottom of the third U-shaped clamping frame. The upper clamping device comprises a first assembly plate, a top block and an upper clamping block, and the first assembly plate is fixedly provided with a top block and an upper clamping block on one side close to the welding test piece, and the lower clamping device comprises a second assembly plate and a lower clamping block, and the second assembly plate is fixedly provided with a lower clamping block on one end close to the welding test piece.

[0007] Preferably, the inner circular hole of the assembly part and the inner circular hole of the connecting plate are equipped with positioning pins, and the front end of the connecting plate and the rear end of the operating rod are fixedly arranged.

[0008] Preferably, the third U-shaped clamping frame and the fourth U-shaped clamping frame are both fixedly arranged on the bracket base, and the rear end of the fixing plate is fixedly arranged on the bracket base.

[0009] Preferably, the first assembly plate and the first U-shaped clamping frame are threadedly assembled by means of studs, and the bottom end of the upper clamping block is in contact with and fits against the top end of the welding test piece.

[0010] Preferably, the second assembly plate and the third U-shaped clamping frame are threadedly assembled by means of studs, and the bottom end of the lower clamping block is in contact with and fits with the bottom end of the welding test piece.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] In the present utility model, it is possible to simultaneously perform the welding limit for 3 groups of test pieces with different thickness combinations. Place the test pieces at the workpiece placement position of the lower clamping block, then manually operate the manual clamp to clamp the test pieces, and then perform welding with the welding tongs. Since the upper and lower clamping blocks are made of polyurethane material and have a certain compression amount, test pieces with different thicknesses from 1 mm to 4 mm can be clamped. After clamping, the welding robot will perform welding on the 3 groups of test pieces respectively according to the pre-set welding program. It has the characteristics of wide application range, high safety, good reliability of the structure, simple structure, and convenient use. The special clamping mechanism adopted by this device loads and clamps the welding test pieces, reduces the danger of manual operation, improves the welding efficiency, and the test pieces are relatively stable in fitting. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0014] Figure 2 For the present utility model Figure 1 is an enlarged schematic diagram of the distribution position of the device in the present utility model;

[0015] Figure 3 is a schematic diagram of the manual clamp device of the present utility model;

[0016] Figure 4 is a schematic diagram of the installation position of the upper U-shaped clamping device and the upper clamping device of the present utility model;

[0017] Figure 5 For the present utility model Figure 2 is a schematic diagram of the rear view structure of the present utility model;

[0018] Figure 6 is a schematic diagram of the installation position of the upper U-shaped clamping device and the lower U-shaped clamping device of the present utility model;

[0019] Figure 7 is a schematic diagram of the clamping structure of the welding test piece, the upper clamping device and the lower clamping device of the present utility model.

[0020] In the figure: 1. Manual clamp device; 11. Fixed plate; 12. Plug-in board; 13. Pressure plate; 14. Fitting; 15. Assembly stud; 16. Operating rod; 17. Positioning pin; 2. Upper U-shaped clamping device; 21. First U-shaped clamping bracket; 22. Second U-shaped clamping bracket; 23. Connecting plate; 3. Lower U-shaped clamping device; 31. Third U-shaped clamping bracket; 32. Fourth U-shaped clamping bracket; 4. Bracket base; 5. Welding test piece; 6. Upper clamping device; 61. First assembly plate; 62. Top block; 63. Upper clamping block; 7. Lower clamping device; 71. Second assembly plate; 72. Lower clamping block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] In the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the position or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Similarly, words such as "one", "a" or "the" do not indicate a quantity limitation, but rather indicate the existence of at least one. Words such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects.

[0023] In addition, in the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0024] Please refer to Figure 1-7 , the present invention provides a technical solution:

[0025] A special clamping mechanism for spot welding test pieces, comprising a manual clamping device 1, an upper U-shaped clamping device 2, a lower U-shaped clamping device 3, a bracket base 4, a welding test piece 5, an upper clamping device 6 and a lower clamping device 7, wherein the upper U-shaped clamping device 2 and the lower U-shaped clamping device 3 are arranged at the rear end of the manual clamping device 1, the bracket base 4 is arranged at the bottom of the lower U-shaped clamping device 3, the upper clamping device 6 is arranged inside the upper U-shaped clamping device 2, and the lower U-shaped clamping device 3 is arranged inside The clamping device 7 is provided with a welding test piece 5 between the upper clamping device 6 and the lower clamping device 7. The manual clamping device 1 includes a fixed plate 11, a plug-in board 12, a pressure plate 13, an assembly part 14, an assembly stud 15, an operating rod 16 and a positioning pin 17. The plug-in board 12 is fixedly provided on the top of the fixed plate 11. The left and right ends of the plug-in board 12 are in contact with the pressure plate 13. The end of the pressure plate 13 away from the plug-in board 12 is in contact with the assembly part 14. The plug-in board 12 and the pressure plate 11 are fixedly provided with the pressure plate 13. 3 and the assembly parts 14 are threadedly assembled by the assembly studs 15, and the assembly parts 14 on the left and right sides are provided with operating rods 16. The upper U-shaped clamping device 2 includes a first U-shaped clamping frame 21, a second U-shaped clamping frame 22 and a connecting plate 23. The second U-shaped clamping frame 22 is provided on the top of the first U-shaped clamping frame 21, and the connecting plate 23 is fixedly provided between the first U-shaped clamping frame 21 and the second U-shaped clamping frame 22. The lower U-shaped clamping device 3 includes a third U-shaped clamping frame The fourth U-shaped clamping frame 32 is arranged at the bottom of the third U-shaped clamping frame 31, the upper clamping device 6 includes a first assembly plate 61, a top block 62 and an upper clamping block 63, the top block 62 and the upper clamping block 63 are fixedly arranged on the side of the first assembly plate 61 close to the welding test piece 5, the lower clamping device 7 includes a second assembly plate 71 and a lower clamping block 72, and the lower clamping block 72 is fixedly arranged on the end of the second assembly plate 71 close to the welding test piece 5.

[0026] The inner circular holes of the assembly part 14 and the inner circular holes of the connecting plate 23 are equipped with positioning pins 17, and the front end of the connecting plate 23 is fixed to the rear end of the operating rod 16. Through the above arrangement, the assembled operating rod 16, the first U-shaped clamping frame 21, the second U-shaped clamping frame 22 and the connecting plate 23 have the ability to rotate circumferentially around the positioning pin 17.

[0027] The third U-shaped clamping frame 31 and the fourth U-shaped clamping frame 32 are both fixed to the bracket base 4, and the rear end of the fixing plate 11 is fixed to the bracket base 4. Through the above arrangement, the bracket base 4 and the third U-shaped clamping frame 31, the fourth U-shaped clamping frame 32 and the fixing plate 11 are an integrated support structure.

[0028] The first assembly plate 61 and the first U-shaped clamping frame 21 are threadedly assembled by studs, and the bottom end of the upper clamping block 63 is in contact with the top end of the welding test piece 5. Through the above arrangement, the first assembly plate 61 and the first U-shaped clamping frame 21 are a combined assembly structure.

[0029] The second assembly plate 71 and the third U-shaped clamping bracket 31 are threadedly assembled by studs. The bottom end of the lower clamping block 72 abuts and fits against the bottom end of the welding test piece 5. Through the above settings, the second assembly plate 71 and the third U-shaped clamping bracket 31 form a combined assembly structure.

[0030] Working process: The present utility model provides a special clamping mechanism. This device mechanism can replace the operator to hold the test piece by hand, and since the installation position of this clamping device remains unchanged, it can be automatically moved to the designated position by the teaching robot, realizing the automatic welding process of the welding test piece 5 by the robot, greatly improving the safety and work efficiency.

[0031] During use, the operating rod 16, the first U-shaped clamping bracket 21, the second U-shaped clamping bracket 22 and the connecting plate 23 are an integral structure. Since the connecting plate 23 and the fitting 14 are assembled and limited by the positioning pin shaft 17, the assembled operating rod 16, the first U-shaped clamping bracket 21, the second U-shaped clamping bracket 22 and the connecting plate 23 have the ability to rotate circumferentially around the positioning pin shaft 17. First, open the manual clamp device 1. The operator holds the upper part of the operating rod 16 and applies force forward and downward. The operating rod 16, the first U-shaped clamping bracket 21, the second U-shaped clamping bracket 22 and the connecting plate 23 rotate. At this time, an opening structure is formed between the lower clamping block 72 and the upper clamping block 63. Put welding test pieces 5 of various combinations, and then the operator holds the operating rod 16 and pushes it back to reset. The clamping and limiting of the welding test piece 5 are completed through the fitting of the lower clamping block 72, the upper clamping block 63 and the welding test piece 5. Then, the operator can leave the work station guardrail, start the robot to automatically run to the vicinity of the clamp according to the pre-taught trajectory to complete the welding process of the welding test piece 5. After the robot completes the welding and returns to the original position, the operator can enter the work station to open the clamp and take out the test piece for inspection of the welding firmness.

[0032] Since the upper clamping block 63 and the lower clamping block 72 are made of polyurethane material and have certain elastic compression characteristics, they can clamp welding test pieces 5 with different thicknesses from 1 mm to 4 mm.

[0033] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A special clamping mechanism for spot welding test pieces, comprising a manual clamping device (1), an upper U-shaped clamping device (2), a lower U-shaped clamping device (3), a bracket base (4), a welding test piece (5), an upper clamping device (6) and a lower clamping device (7), characterized in that: The manual clamp device (1) is provided with an upper U-shaped clamp device (2) and a lower U-shaped clamp device (3) at the rear end, a bracket base (4) is provided at the bottom of the lower U-shaped clamp device (3), an upper clamp device (6) is provided inside the upper U-shaped clamp device (2), a lower clamp device (7) is provided inside the lower U-shaped clamp device (3), a welding test piece (5) is provided between the upper clamp device (6) and the lower clamp device (7), and the manual clamp device (1) comprises a fixing plate (11), a plug-in plate (12), A pressure plate (13), an assembly part (14), an assembly stud (15), an operating rod (16) and a positioning pin (17); a plug-in plate (12) is fixedly arranged on the top of the fixing plate (11); the left and right ends of the plug-in plate (12) are in close contact with the pressure plate (13); the end of the pressure plate (13) away from the plug-in plate (12) is in close contact with the assembly part (14); the plug-in plate (12), the pressure plate (13) and the assembly part (14) are threadedly assembled by the assembly stud (15); the assembly parts on the left and right sides are (14) is provided with an operating rod (16) inside, the upper U-shaped clamping device (2) comprises a first U-shaped clamping frame (21), a second U-shaped clamping frame (22) and a connecting plate (23), the second U-shaped clamping frame (22) is provided on the top of the first U-shaped clamping frame (21), and a connecting plate (23) is fixedly provided between the first U-shaped clamping frame (21) and the second U-shaped clamping frame (22), the lower U-shaped clamping device (3) comprises a third U-shaped clamping frame (31) and a fourth U-shaped clamping frame (32), the third A fourth U-shaped clamping frame (32) is arranged at the bottom of the U-shaped clamping frame (31); the upper clamping device (6) comprises a first assembly plate (61), a top block (62) and an upper clamping block (63); the first assembly plate (61) is fixedly provided with the top block (62) and the upper clamping block (63) on one side close to the welding test piece (5); the lower clamping device (7) comprises a second assembly plate (71) and a lower clamping block (72); the second assembly plate (71) is fixedly provided with the lower clamping block (72) on one end close to the welding test piece (5).

2. According to claim 1, a special clamping mechanism for spot welding test pieces, characterized in that: The inner circular hole of the assembly part (14) and the inner circular hole of the connecting plate (23) are equipped with positioning pin shafts (17), and the front end of the connecting plate (23) is fixedly arranged with the rear end of the operating rod (16).

3. According to claim 1, a special clamping mechanism for spot welding test pieces, characterized in that: The third U-shaped clamping frame (31) and the fourth U-shaped clamping frame (32) are both fixedly arranged on the bracket base (4), and the rear end of the fixing plate (11) is fixedly arranged on the bracket base (4).

4. The special clamping mechanism for spot welding test pieces according to claim 1, characterized in that: The first assembly plate (61) and the first U-shaped clamping frame (21) are threadedly assembled via studs, and the bottom end of the upper clamping block (63) is in contact with and fits against the top end of the welding test piece (5).

5. The special clamping mechanism for spot welding test piece according to claim 1, characterized in that: The second assembly plate (71) and the third U-shaped clamping frame (31) are threadedly assembled via studs, and the bottom end of the lower clamping block (72) is in contact with and fits with the bottom end of the welding test piece (5).

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