A spot welding device

Abstract

This utility model discloses a spot welding device, including a DC spot welding machine and a rotating disk. The rotating disk is arranged on one side of the DC spot welding machine, and a base is installed below the rotating disk. Beneficial effects: This utility model, with its rotating disk, allows for spot welding of sheet metal. After aligning two sets of sheet metal at the welding point, one end is inserted into the top surface of the cantilever seat. Then, rotating the handle bolt causes the clamping block to clamp the two sets of sheet metal. Subsequently, a stepper motor drives the drive gear to rotate, which in turn drives the driven gear, causing the central column and rotating disk to rotate, thus rotating the welding point of the two sets of sheet metal to the welding station of the DC spot welding machine. The DC spot welding machine then performs spot welding. During spot welding, workers can simultaneously reassemble and disassemble the sheet metal, saving assembly and disassembly time, improving work continuity and efficiency, eliminating the hassle of manually holding the sheet metal, and improving ease of use.

Description

Technical Field

[0001] This utility model relates to the field of spot welding machine technology, and more specifically, to a spot welding device. Background Technology

[0002] The spot welding machine adopts the principle of double-sided double-point overcurrent welding. During operation, the two electrodes press the workpiece so that the two layers of metal form a certain contact resistance under the pressure of the two electrodes. When the welding current flows from one electrode to the other electrode, it forms an instantaneous heat fusion at the two contact resistance points. The welding current also flows instantaneously from the other electrode along the two workpieces to this electrode to form a circuit, without damaging the internal structure of the workpiece being welded.

[0003] Traditional spot welding machines require workers to manually align the weld points on the workpieces and hold them in place, which is quite cumbersome. Adjusting the weld point position also requires manual adjustment, which is also troublesome. Furthermore, workers cannot prepare for the next set of workpieces during the welding process, affecting work efficiency. Further improvements are needed. Utility Model Content

[0004] (a) Technical problems to be solved In view of the shortcomings of the prior art, this utility model provides a spot welding device, which has the advantages of improving work efficiency and ease of use, thereby solving the problems in the background art mentioned above.

[0005] (II) Technical Solution To achieve the aforementioned advantages of improved work efficiency and ease of use, the specific technical solution adopted by this utility model is as follows: A spot welding device includes a DC spot welding machine and a rotating disk. The rotating disk is arranged on one side of the DC spot welding machine, and a base is installed below the rotating disk. A central column is rotatably connected to the top surface of the base through a rotating connecting seat. The top surface of the central column is fixedly connected to the bottom surface of the rotating disk, and a driven gear is fixedly sleeved on the outer surface of the central column. A stepper motor is fixedly installed on the top surface of the base, and the output end of the stepper motor meshes with the driven gear through a driving gear. Movable grooves are fixedly installed at both ends of the top surface of the rotating disk, and movable seats are slidably connected inside the movable grooves. An end plate is fixedly installed on the top surface of the movable seat. A movable block is slidably connected between the end plates, and a cantilever seat is fixedly installed on the top surface of the movable block. A top frame is fixedly installed on the top surface of the cantilever seat. A handle bolt is threadedly connected to the top surface of the top frame, and a clamping block is fixedly installed on the bottom surface of the handle bolt.

[0006] Furthermore, a second servo motor is fixedly installed at one end of the moving slot, and a second lead screw is installed at the output end of the second servo motor, and the second lead screw passes through the moving seat and is threadedly engaged with the moving seat.

[0007] Furthermore, a first servo motor is fixedly installed at one end of the end plate, and a first lead screw is installed at the output end of the first servo motor, and the first lead screw passes through the moving block and is threadedly engaged with the moving block.

[0008] Furthermore, a first guide rod is fixedly installed between the end plates, and the first guide rod passes through the moving block and is slidably connected to the moving block.

[0009] Furthermore, a second guide rod is fixedly installed inside the movable slot, and the second guide rod observes the movable seat and is slidably connected to the movable seat.

[0010] Furthermore, the first lead screw passes through the end plate and is rotatably connected to the end plate via a bearing.

[0011] Furthermore, the second lead screw passes through the moving groove and is rotatably connected to the moving groove via a bearing.

[0012] (III) Beneficial Effects Compared with the prior art, the present invention provides a spot welding device with the following advantages: (1) This utility model is equipped with a rotating disk. When spot welding the plates, the two sets of plates can be assembled and aligned to the welding point position. Then, one end of the plate is inserted into the top surface of the cantilever seat. Then, the handle bolt is rotated to drive the clamping block to clamp the two sets of plates. Then, the stepper motor drives the drive gear to rotate, drives the driven gear to rotate, drives the central column and rotating disk to rotate, and rotates the welding point position of the two sets of plates to the welding station of the DC spot welding machine. The DC spot welding machine performs spot welding on the welding point. During spot welding, the staff can simultaneously reassemble and disassemble the plates, saving assembly and disassembly time, improving the continuity and efficiency of work, eliminating the trouble of manually holding the plates, and improving the convenience of use.

[0013] (2) This utility model is equipped with a cantilever seat that can move forward, backward, left and right. When spot welding is performed, the first servo motor drives the first lead screw to rotate, which drives the moving block to move, and drives the cantilever seat and the plate to move laterally, changing the lateral welding point position. At the same time, the second servo motor drives the second lead screw to rotate, which drives the moving seat to move, and drives the cantilever seat and the plate to move longitudinally, changing the longitudinal welding point position. This completes the automatic spot welding work of multiple points, saving the trouble of manual adjustment of position, and further improving work efficiency and ease of use. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of a spot welding device according to an embodiment of the present utility model; Figure 2 This is a front view of a spot welding device according to an embodiment of the present utility model; Figure 3 This is an enlarged view of node A of a spot welding device according to an embodiment of the present utility model; Figure 4 This is an installation diagram of the cantilever seat according to an embodiment of the present utility model.

[0016] In the picture: 1. DC spot welding machine; 2. Rotary disk; 3. Central column; 4. Base; 5. Stepper motor; 6. Drive gear; 7. Driven gear; 8. Rotary connecting seat; 9. Moving slot; 10. Moving seat; 11. First servo motor; 12. First lead screw; 13. Second lead screw; 14. Second servo motor; 15. Moving block; 16. Cantilever seat; 17. Top frame; 18. Handle bolt; 19. Clamping block; 20. End plate; 21. First guide rod; 22. Second guide rod. Detailed Implementation

[0017] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0018] According to an embodiment of the present invention, a spot welding device is provided.

[0019] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. Please refer to them. Figure 1 and Figure 4 A spot welding device according to an embodiment of the present invention includes a DC spot welding machine 1 and a rotating disk 2. The DC spot welding machine 1 is a common device in the art. It performs spot welding by moving the welding head up and down with a cylinder. The welding current is stable and the weld is firm. It will not be described in detail here. A rotating disk 2 is arranged on one side of the DC spot welding machine 1. The rotating disk 2 is a circular steel plate with a surface processed to ensure flatness. A base 4 is installed below the rotating disk 2. The base 4 is a heavy-duty cast iron base that provides stable support. The top surface of the base 4 is rotatably connected to the central column 3 via a rotating connecting seat 8. The rotating connecting seat 8 is a high-precision axial rotation connection assembly with bearings inside to ensure smooth rotation of the central column 3. The top surface of the central column 3 is welded and fixedly connected to the bottom surface of the rotating disk 2. A driven gear 7 is fixedly sleeved on the outer surface of the central column 3 via a key connection. A stepper motor 5 is fixedly installed on the top surface of the base 4 via bolts. The stepper motor 5 is a high-precision servo stepper motor with high control accuracy. A drive gear 6 is installed on the output end of the stepper motor 5 via a key connection. The drive gear 6 meshes with the driven gear 7 to form a transmission mechanism. The stepper motor 5 has a step angle of 180° and can reciprocate, thereby driving the rotating disk 2 to reciprocate, which facilitates the alternating transport of workpieces to the welding station and realizes flip-type feeding. The top surface of the rotating disk 2 is fixedly mounted with movable grooves 9 by bolts at both ends. The movable grooves 9 are U-shaped groove structures, and movable seats 10 are slidably connected inside. The movable seats 10 can slide smoothly along the movable grooves 9. The top surface of the movable seats 10 is fixedly mounted with end plates 20 by bolts. The end plates 20 are rectangular steel plates, and two sets are arranged parallel to each other.

[0020] A movable block 15 is slidably connected between the end plates 20, and the movable block 15 can move smoothly between the two sets of end plates 20. A cantilever seat 16 is welded and fixedly installed on the top surface of the movable block 15. The cantilever seat 16 is an L-shaped steel plate located outside the welding station of the DC spot welding machine 1 to prevent itself from extending into the spot welding station and causing welding interference or failure. When installing the workpiece to be welded, the welding point should extend to the outside of the cantilever seat 16 to ensure that the welding head can accurately act on the welding point. A top frame 17 is welded and fixedly installed on the top surface of the cantilever seat 16. The top frame 17 has an inverted L-shaped structure, and a handle bolt 18 is threaded through the top surface. The head of the handle bolt 18 has anti-slip texture for easy manual rotation, and a clamping block 19 is welded and fixedly installed on the bottom surface of the handle bolt 18. The clamping block 19 is made of rubber to avoid damaging the workpiece, forming a common clamping structure. When spot welding the plates, the two sets of plates can be assembled and aligned to the welding point position. Then, one end of the plate is inserted into the top surface of the cantilever seat 16. Subsequently, the handle bolt 18 is turned to move the clamping block 19 down and clamp the two sets of plates to ensure that the plates will not shift during the welding process. Subsequently, the stepper motor 5 drives the drive gear 6 to rotate, the drive gear 6 drives the driven gear 7 to rotate, and in turn drives the central column 3 and the rotating disk 2 to rotate, accurately rotating the welding point position of the two sets of plates to the welding station of the DC spot welding machine 1. The welding head of the DC spot welding machine 1 moves down to spot weld the welding point. While spot welding is being performed, workers can reassemble the next set of plates and disassemble the previous set of welded plates on the cantilevered seat 16 at the other end of the rotating plate 2. This saves assembly and disassembly time, improves the continuity and efficiency of the work, eliminates the hassle of manually holding the plates, ensures welding quality and operational safety, and improves ease of use. Please refer to Figure 2 and Figure 3A second servo motor 14 is bolted to one end of the moving slot 9. The second servo motor 14 is a high-precision servo motor, ensuring precise control. A second lead screw 13 is mounted to the output end of the second servo motor 14 via a coupling. The second lead screw 13 is a trapezoidal lead screw that passes through the moving seat 10 and is threaded into it, forming a common linear motion drive structure. The forward and reverse rotation of the second servo motor 14 drives the moving seat 10 to reciprocate along the moving slot 9. Please refer to Figure 2 and Figure 3 One end of the end plate 20 is fixedly mounted with a first servo motor 11 by bolts. The first servo motor 11 is also a high-precision servo motor. The output end of the first servo motor 11 is mounted with a first lead screw 12 through a coupling. The first lead screw 12 is also a trapezoidal lead screw, and the first lead screw 12 passes through the moving block 15 and is threadedly engaged with the moving block 15, forming a common linear motion drive structure. The first lead screw 12 and the second lead screw 13 are arranged vertically to form a cross-shaped moving mechanism. The first servo motor 11 and the second servo motor 14 are both used in conjunction with a PLC control system. The moving distance and path are preset by the PLC to form a common control structure, which facilitates the realization of automated spot welding production. During spot welding, the first servo motor 11 drives the first lead screw 12 to rotate, and the first lead screw 12 drives the moving block 15 to move laterally along the end plate 20, thereby driving the cantilever seat 16 and the plate to move laterally, changing the lateral welding point position; at the same time, the second servo motor 14 drives the second lead screw 13 to rotate, and the second lead screw 13 drives the moving seat 10 to move longitudinally along the moving groove 9, thereby driving the cantilever seat 16 and the plate to move longitudinally, changing the longitudinal welding point position. Through the coordinated operation of the first servo motor 11 and the second servo motor 14, automated multi-point spot welding can be completed without the need for manual adjustment of the workpiece position, thus eliminating the hassle of manual adjustment, further improving work efficiency and ease of use, and ensuring the consistency of accuracy of each weld point position. Please refer to Figure 1 and Figure 3 A first guide rod 21 is welded and fixed between the end plates 20. The first guide rod 21 is a chrome-plated round rod with a smooth surface. The first guide rod 21 passes through the moving block 15 and is slidably connected to the moving block 15. The fit gap between the first guide rod 21 and the moving block 15 is small, which provides precise guidance for the movement of the moving block 15, prevents the moving block 15 from deviating or rotating during the movement, and improves the stability of the movement of the moving block 15. Please refer to Figure 1 and Figure 3The second guide rod 22 is welded and fixedly installed inside the moving groove 9. The second guide rod 22 is also a chrome-plated round rod, and it passes through the moving seat 10 and is slidably connected to the moving seat 10. The second guide rod 22 is the moving guide of the moving seat 10, ensuring that the moving seat 10 moves smoothly along a straight line, improving the stability of the moving seat 10, and avoiding the impact of the moving seat 10 shaking on the welding accuracy. Please refer to Figure 3 and Figure 4 The first lead screw 12 passes through the end plate 20 and is rotatably connected to the end plate 20 through a bearing. The bearing is a high-precision ball bearing, which reduces the frictional resistance when the first lead screw 12 rotates, improves the stability of the first lead screw 12 rotation, and ensures the smooth movement of the moving block 15. It is not shown in detail in the figure. Please refer to Figure 3 and Figure 4 The second lead screw 13 passes through the moving groove 9 and is rotatably connected to the moving groove 9 via a bearing. The bearing is also a high-precision ball bearing, which effectively reduces the wear of the second lead screw 13 during rotation, improves the stability of the rotation of the second lead screw 13, and ensures the accuracy of the movement of the moving seat 10. It is not shown in detail in the figure. Working principle: Before spot welding the sheet metal, the movement parameters of the first servo motor 11 and the second servo motor 14 are set by the PLC to determine the position coordinates of each welding point. Assemble and align the two sets of plates that need to be spot welded, ensuring that the weld points are accurately aligned. Then, place one end of the plate on the top surface of the cantilever seat 16 at one end of the rotating disk 2, and rotate the handle bolt 18 to move the clamping block 19 down to clamp and fix the plate. Start the stepper motor 5, which drives the drive gear 6 to rotate. The drive gear 6 drives the driven gear 7 and the central column 3 to rotate, which in turn drives the rotating disk 2 to rotate 180°, transferring the fixed plate to the welding station of the DC spot welding machine 1. At this time, the staff can assemble and fix the next set of panels on the cantilever seat 16 at the other end of the turntable 2, so as to achieve parallel operation. The DC spot welding machine 1 is started. At the same time, according to the preset program, the first servo motor 11 and the second servo motor 14 drive the first lead screw 12 and the second lead screw 13 to rotate respectively. Through the movement of the moving block 15 and the moving seat 10, the plate is moved on the horizontal plane, and the first welding point position is aligned with the welding head of the DC spot welding machine 1. The welding head moves down to spot weld the first weld point. After that, the welding head moves up, and the first servo motor 11 and the second servo motor 14 continue to drive the plate to move, aligning the next weld point with the welding head. The spot welding process is repeated until all preset weld points are welded. After welding is completed, the stepper motor 5 drives the rotating disk 2 to rotate 180° in the opposite direction, transferring the welded plate back to the initial position. The operator can turn the handle bolt 18 to loosen the clamp 19, remove the welded plate, and at the same time transfer the plate that has been assembled at the other end to the welding station for welding. This cycle continues. This device achieves alternating transfer of workpieces through a rotating disk, and combines a cross-shaped moving mechanism to achieve automatic point adjustment, which improves the automation level and work efficiency of spot welding and ensures the consistency of welding quality.

[0021] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A spot welding apparatus, comprising a DC spot welding machine (1) and a rotating disk (2), characterized in that, A rotating disk (2) is arranged on one side of the DC spot welding machine (1), and a base (4) is installed below the rotating disk (2). A central column (3) is rotatably connected to the top surface of the base (4) through a rotating connecting seat (8). The top surface of the central column (3) is fixedly connected to the bottom surface of the rotating disk (2), and a driven gear (7) is fixedly sleeved on the outer surface of the central column (3). A stepper motor (5) is fixedly installed on the top surface of the base (4), and the output end of the stepper motor (5) meshes with the driven gear (7) through a drive gear (6). The top surface of the rotating disk (2) is... The two ends of the surface are fixedly installed with a movable groove (9), and a movable seat (10) is slidably connected inside the movable groove (9). An end plate (20) is fixedly installed on the top surface of the movable seat (10). A movable block (15) is slidably connected between the end plates (20). A cantilever seat (16) is fixedly installed on the top surface of the movable block (15), and a top frame (17) is fixedly installed on the top surface of the cantilever seat (16). A handle bolt (18) is threadedly connected to the top surface of the top frame (17), and a clamping block (19) is fixedly installed on the bottom surface of the handle bolt (18).

2. The spot welding device according to claim 1, characterized in that, The second servo motor (14) is fixedly installed at one end of the moving slot (9), and the second lead screw (13) is installed at the output end of the second servo motor (14). The second lead screw (13) passes through the moving seat (10) and is threadedly engaged with the moving seat (10).

3. The spot welding device according to claim 1, characterized in that, The end plate (20) is fixedly mounted with a first servo motor (11) at one end, and a first lead screw (12) is mounted at the output end of the first servo motor (11), and the first lead screw (12) passes through the moving block (15) and is threadedly engaged with the moving block (15).

4. The spot welding device according to claim 1, characterized in that, A first guide rod (21) is fixedly installed between the end plates (20), and the first guide rod (21) passes through the moving block (15) and is slidably connected to the moving block (15).

5. A spot welding device according to claim 1, characterized in that, The second guide rod (22) is fixedly installed inside the moving slot (9), and the second guide rod (22) observes the moving seat (10) and is slidably connected to the moving seat (10).

6. A spot welding device according to claim 3, characterized in that, The first lead screw (12) passes through the end plate (20) and is rotatably connected to the end plate (20) through a bearing.

7. A spot welding device according to claim 2, characterized in that, The second lead screw (13) passes through the moving groove (9) and is rotatably connected to the moving groove (9) via a bearing.

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