Spot welding mechanical arm

Abstract

The spot welding mechanical arm comprises a main body rack, a middle adjusting structure and an upper layer moving structure, a partition plate is arranged in the main body rack, supporting plates are symmetrically arranged on the upper face of the partition plate and one side of the main body rack, a first lead screw is rotationally arranged between the supporting plates, and first guide rails are arranged on the front side and the rear side of the upper face of the main body rack. A working platform is arranged on the rear side of the main machine frame, X-axis transverse movement of the middle adjusting structure is achieved through a first guide rail, Y-axis longitudinal movement of the upper-layer moving structure is achieved through a second guide rail, and the first lead screw and the second lead screw rotate through a driving mechanism with a motor as driving force. Automatic welding operation is assisted, and the safety of welding personnel and the environment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of spot welding robotic arms, specifically to a spot welding robotic arm. Background Art

[0002] The working principle of a spot welder is to utilize the high temperature generated at the contact resistance to instantly melt the metal, thereby firmly welding the workpieces together. It does not require the use of welding electrodes, but instead realizes welding by using the two workpieces to be welded as the two electrodes of the circuit respectively. The spot welder auxiliary robotic arm is an automated device widely used in the welding field, which can assist the spot welder to perform efficient and accurate welding operations.

[0003] Currently, when using a spot welder, the workpieces to be welded are directly placed in the welding space, and the welding operation is carried out by experienced welders. The position of the welding points and the welding time during the welding process are determined by the welders themselves. There are the following deficiencies in the welding operation:

[0004] 1. The workpieces to be welded are directly installed on the spot welder, and the welding points are adjusted by relying on the self-adjustment function of the spot welder, resulting in limited welding size and efficiency;

[0005] 2. For workpieces with complex and irregular shapes, the operation of the spot welder is more difficult, and it is difficult to ensure the uniform distribution and quality consistency of the welding points;

[0006] 3. The spot welder will generate noise, smoke and harmful gases during the welding process, causing certain harm to the operator and the environment. Content of the Utility Model

[0007] The utility model aims to solve the problems of difficult to ensure the uniform distribution and quality consistency of welding points, the spot welder will generate noise, smoke and harmful gases during the welding process, causing certain harm to the operator and the environment, and poor welding effect, etc.

[0008] To solve the above technical problems, the technical solution provided by the utility model is: a spot welding robotic arm, including a main body frame, an intermediate adjustment structure, and an upper layer moving structure. There is a partition inside the main body frame. Symmetrically arranged support plates are provided on the upper surface of the partition and one side of the main body frame. A first lead screw is rotatably arranged between the support plates. First guide rails are provided on the front and rear sides of the upper surface of the main body frame. A working platform is provided at the rear side of the main body frame;

[0009] The intermediate adjustment structure includes a frame. Bottom plates are provided on both sides of the lower surface of the frame. First sliders are provided at both ends of the lower surface of the bottom plates. The first sliders are slidably connected with the first guide rails. A moving block is provided between one of the bottom plates. The moving block is threadedly connected with the first lead screw. Second guide rails are provided on both sides of the upper surface of the frame. A U-shaped plate is provided in the middle of the frame. A second lead screw is rotatably arranged inside the U-shaped plate. The second lead screw is arranged parallel to the second guide rails;

[0010] The upper moving structure includes a moving frame. On both sides of the lower surface of the moving frame, there are second sliders which are slidably connected to the second guide rails. On both sides of the upper surface of the moving frame, there are side plates. Between the side plates and on the upper surface of the moving frame, there is a top plate. In the middle of the lower surface of the moving frame, there is a moving part which is threadedly connected to the second lead screw. On the front and rear sides of the upper surface of the moving frame, there are third guide rails. And on the upper surface of the moving frame, there is an adjusting mechanism.

[0011] Among them, the first guide rail realizes the X-axis lateral movement of the middle adjustment structure, the second guide rail realizes the Y-axis longitudinal movement of the upper moving structure, and both the first lead screw and the second lead screw are rotated by a driving mechanism with a motor as the driving force.

[0012] Furthermore, the adjusting mechanism includes third sliders fixed on both sides of the lower surface of the side plates. The third sliders are slidably connected to the third guide rails. Between the side plates, there is a supporting square frame extending towards the front side of the moving frame. Inside the supporting square frame, there is a placing groove. Inside the placing groove, there is a welding fixture. On both sides of the supporting square frame, there are several groups of automatic clamping pliers for tightly fixing the welding fixture symmetrically.

[0013] Among them, the welding fixture can be adjusted in size, and the distance between the side plates is adjusted accordingly according to the welding fixture.

[0014] Furthermore, the size of the top plate can be adjusted and replaced with different sizes.

[0015] Furthermore, on both sides of the upper surface of the main body frame, there are telescopic protective covers. The lower sides of the telescopic protective covers are slidably connected to the guide rails, and the telescopic protective covers are fixedly connected to the side surfaces of the frame.

[0016] The advantages of the present utility model are as follows: (1) Auxiliary positioning: The robotic arm can accurately position the welding points, ensuring the accuracy and consistency of the welding positions.

[0017] (2) Automated operation: Through preset programs or sensor inputs, the robotic arm can automatically perform welding operations, reducing manual intervention and improving production efficiency.

[0018] (3) Improved safety: Since the robotic arm can replace humans in performing dangerous welding operations, the labor intensity and safety risks of the operators are reduced, and the safety of the working environment is improved. Description of the Drawings

[0019] Figure 1 is the exploded structure schematic diagram of the present utility model.

[0020] Figure 2 is the schematic diagram of the main body frame of the present utility model.

[0021] Figure 3 It is a schematic diagram of the intermediate adjustment structure of the present utility model.

[0022] Figure 4 It is a schematic diagram of the upper-layer moving structure of the present utility model.

[0023] Figure 5 It is a schematic diagram of the installation structure of the present utility model.

[0024] As shown in the figure: 1. Main body frame; 2. Intermediate adjustment structure; 20. Frame; 27. Bottom plate; 3. Upper-layer moving structure; 4. Partition board; 5. Support plate; 6. First lead screw; 7. First guide rail; 8. Working platform; 9. First slider; 10. Moving block; 11. Second guide rail; 12. U-shaped plate; 13. Second lead screw; 14. Moving frame; 15. Second slider; 16. Side plate; 17. Top plate; 18. Moving part; 19. Third guide rail; 21. Third slider; 22. Support square frame; 23. Placing groove; 24. Welding fixture; 25. Automatic pressing pliers; 26. Telescopic protective cover. Specific embodiments

[0025] The following further elaborates on the present utility model in conjunction with the attached drawings.

[0026] Combined with the attached Figures 1 - 5 , the spot welding robotic arm includes a main body frame 1, an intermediate adjustment structure, and an upper-layer moving structure 3. A partition board 4 is provided inside the main body frame 1. Symmetric support plates 5 are provided on the upper surface of the partition board 4 and on one side of the main body frame 1. A first lead screw 6 is rotatably provided between the support plates 5. First guide rails 7 are provided on the front and rear sides of the upper surface of the main body frame 1. A working platform 8 is provided at the rear side of the main body frame 1. The first guide rail 7 realizes the X-axis lateral movement of the intermediate adjustment structure;

[0027] The intermediate adjustment structure includes a frame 20. Bottom plates 27 are provided on both sides of the lower surface of the frame 20. First sliders 9 are provided at both ends of the lower surface of the bottom plates 27. The first sliders 9 are slidably connected to the first guide rails 7. A moving block 10 is provided between one of the bottom plates 27. The moving block 10 is threadedly connected to the first lead screw 6. Second guide rails 11 are provided on both sides of the upper surface of the frame 20. A U-shaped plate 12 is provided in the middle of the frame 20. A second lead screw 13 is rotatably provided inside the U-shaped plate 12. The second lead screw 13 is arranged parallel to the second guide rails 11. The second guide rail 11 realizes the Y-axis longitudinal movement of the upper-layer moving structure 3;

[0028] The upper moving structure 3 includes a moving frame 14. On both sides of the lower surface of the moving frame 14, there are second sliders 15 which are slidably connected to the second guide rails 11. On both sides of the upper surface of the moving frame 14, there are side plates 16. Between the side plates 16 and on the upper surface of the moving frame 14, there is a top plate 17. In the middle of the lower surface of the moving frame 14, there is a moving part 18 which is threadedly connected to the second lead screw 13. On the front and rear sides of the upper surface of the moving frame 14, there are third guide rails 19, and an adjusting mechanism is arranged on the upper surface of the moving frame 14.

[0029] Among them, both the first lead screw 6 and the second lead screw 13 are rotated by a driving mechanism with a motor as the driving force. The motor drives the belt wheels arranged on the first lead screw 6 or the second lead screw 13 through the driving belt wheels and belts, so as to realize power transmission. The motor is a servo motor to control the distances of the horizontal movement in the X-axis and the vertical movement in the Y-axis.

[0030] It should be noted that the spot welder is placed at the middle position on one side of the main body frame 1. The welding fixture 24 of the upper moving structure 3 is placed in the welding space of the spot welder, and the position of the welding fixture 24 is adjusted in the front, rear, left, right and other positions in cooperation with the action of the spot welder.

[0031] Furthermore, the adjusting mechanism includes third sliders 21 fixed on both sides of the lower surface of the side plates 16. The third sliders 21 are slidably connected to the third guide rails 19. Between the side plates 16, there is a supporting square frame 22 extending towards the front side of the moving frame 14. Inside the supporting square frame 22, there is a placing groove 23. In the placing groove 23, there is a welding fixture 24. On both sides of the supporting square frame 22, there are several groups of automatic clamping pliers 25 for pressing and fixing the welding fixture 24 symmetrically. The size of the top plate 17 can be adjusted and replaced with different sizes.

[0032] Among them, the size of the welding fixture 24 can be selected and adjusted, and the distance between the side plates 16 is adjusted accordingly according to the welding fixture 24

[0033] The top plate 17 is fixed between the side plates 16 to limit the distance between the side plates 16 to suit the size of the welding fixture 24.

[0034] On both sides of the upper surface of the main body frame 1, there are telescopic protective covers 26. The lower sides of the telescopic protective covers 26 are slidably connected to the guide rails. The telescopic protective covers 26 are fixedly connected to the side surface of the frame 20. The telescopic protective covers 26 can be extended and contracted following the horizontal movement of the frame 20 to realize the dust-proof shielding function for the main body frame 1.

[0035] In the specific implementation of the present utility model, the welding part is fixed, a welding fixture is selected and placed between the placement grooves, the side plate is moved to clamp the welding fixture and fixed by an automatic clamping pliers (the third slider moves on the third guide rail), the side plate is fixed and limited by the corresponding top plate, and the fixture is placed in the welding space of the spot welder;

[0036] During welding, the second lead screw rotates to drive the moving part so that the moving frame moves longitudinally along the Y axis (the second slider moves along the second guide rail), the first lead screw rotates to drive the moving block so that the frame moves horizontally along the X axis (the first slider slides along the first guide rail), and the frame drives the telescopic protective covers on both sides to unfold or fold, blocking the spatter generated during the welding process outside the main body frame.

[0037] The above describes the present utility model and its implementation manners. Such description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present utility model, and the actual structure is not limited thereto. All in all, if those of ordinary skill in the art are inspired by it and, without departing from the gist of the creation of the present utility model, design similar structural manners and embodiments to this technical solution without creative efforts, they shall fall within the protection scope of the present utility model.

Claims

1. A spot welding robot arm, comprising a main frame (1), an intermediate adjustment structure (2), and an upper movable structure (3), characterized in that: A partition (4) is provided inside the main frame (1), a support plate (5) is symmetrically provided on the partition (4) and on one side of the main frame (1), a first screw rod (6) is rotatably provided between the support plates (5), first guide rails (7) are provided on the front and rear sides of the main frame (1), and a working platform (8) is provided on the rear side of the main frame (1); The intermediate adjustment structure (2) comprises a frame (20), bottom plates (27) are provided on both sides of the lower side of the frame (20), first sliders (9) are provided at both ends of the lower side of the bottom plate (27), the first sliders (9) are slidably connected to the first guide rails (7), a moving block (10) is provided between one of the bottom plates, the moving block (10) is threadedly connected to the first screw rod (6), second guide rails (11) are provided on both sides of the upper side of the frame (20), a U-shaped plate (12) is provided in the middle of the frame (20), a second screw rod (13) is rotatably provided in the U-shaped plate (12), and the second screw rod (13) is arranged parallel to the second guide rail (11); The upper movable structure (3) comprises a movable frame (14), second sliders (15) are provided on both sides of the lower side of the movable frame (14), the second sliders (15) are slidably connected to the second guide rails (11), side plates (16) are provided on both sides of the upper side of the movable frame (14), a top plate (17) is provided between the side plates (16) and located on the upper side of the movable frame (14), a movable part (18) is provided in the middle of the lower side of the movable frame (14), the movable part (18) is threadedly connected to the second screw rod (13), third guide rails (19) are provided on the front and rear sides of the upper side of the movable frame (14), and an adjustment mechanism is provided on the upper side of the movable frame (14); The first guide rail (7) realizes the X-axis lateral movement of the intermediate adjustment structure (2), the second guide rail (11) realizes the Y-axis longitudinal movement of the upper movable structure (3), and the first screw rod (6) and the second screw rod (13) are both rotated by a driving mechanism using a motor as a driving force.

2. The spot welding robot arm according to claim 1, characterized in that: The adjustment mechanism comprises a third slide block (21) fixed on both sides below the side plate (16), the third slide block (21) being slidably connected to the third guide rail (19), a supporting square frame (22) extending toward the front side of the moving frame (14) being provided between the side plates (16), a placement groove (23) being provided inside the supporting square frame (22), a welding fixture (24) being provided inside the placement groove (23), and a plurality of groups of automatic pressing pliers (25) for pressing and fixing the welding fixture (24) being symmetrically provided on both sides of the supporting square frame (22).

3. The spot welding robot arm according to claim 1, characterized in that: The size of the top plate (17) can be adjusted and replaced into different sizes.

4. The spot welding robot arm according to claim 1, characterized in that: Both sides of the upper surface of the main frame (1) are provided with telescopic protective covers (26), both sides of the lower surface of the telescopic protective covers (26) are slidably connected to guide rails, and the telescopic protective covers (26) are fixedly connected to the side surfaces of the frame.

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