A spot welding machine for sheet metal processing

Abstract

This utility model relates to the field of sheet metal processing technology and discloses a spot welding machine for sheet metal processing. It includes a spot welding machine body, with a fixed frame and a support frame fixedly connected to the front of the machine body. A cylinder is fixedly installed on one side of the fixed frame, and a fixed seat is fixedly connected to the telescopic end of the cylinder. An upper welding gun is installed inside the fixed seat, and a movable groove is provided on the top of the support frame. This utility model, through the coordinated use of the movable groove, the fixed seat, the lower welding gun, and the adjustment components, achieves precise adjustment of the lower welding gun position through the mechanical linkage design of the threaded rod and the guide rod. This ensures good electrode contact and avoids quality problems such as incomplete welding and insufficient penetration caused by differences in sheet metal thickness. Simultaneously, the rotary adjustment wheel replaces the traditional cylinder stroke adjustment, eliminating the need for complex parameter settings or pneumatic system maintenance. Operators can quickly adapt to sheet metal parts of different thicknesses, lowering the operational threshold.

Description

Technical Field

[0001] This utility model relates to the field of sheet metal processing technology, and in particular to a spot welding machine for sheet metal processing. Background Technology

[0002] Spot welding technology is widely used in the sheet metal processing industry, especially in the automotive, home appliance, and electronics industries, where spot welding machines play a vital role in large-scale production. With the diversification of sheet metal processing needs, particularly the welding of sheet metal materials of varying thicknesses, spot welding machines require greater adaptability and flexibility.

[0003] Traditional sheet metal spot welding machines typically rely on adjusting the cylinder extension stroke or changing electrodes to adapt the gap when welding workpieces of different thicknesses. While this can meet some basic requirements, the adjustment process is often cumbersome and time-consuming when dealing with sheet metal of different thicknesses, and it cannot ensure the consistency of welding parameters each time. At the same time, traditional spot welding machines generate a large amount of fumes and harmful gases during the welding process, polluting the working environment and posing potential health hazards to operators. Existing welding fume treatments mostly rely on external cartridge dust collectors, which require frequent shutdowns to replace the filter elements, making it quite troublesome.

[0004] Therefore, those skilled in the art propose a spot welding machine for sheet metal processing to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a spot welding machine for sheet metal processing.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a spot welding machine for sheet metal processing, comprising a spot welding machine body, a fixed frame and a support frame fixedly connected to the front of the spot welding machine body, a cylinder fixedly installed on one side of the fixed frame, a fixed seat one fixedly connected to the telescopic end of the cylinder, an upper welding gun installed inside the fixed seat one, a movable groove opened on the top of the support frame, a fixed seat two fixedly connected to the top of the movable groove, a lower welding gun installed inside the fixed seat two, an adjustment component capable of driving the lower welding gun to move is provided between the two sides of the inner wall of the support frame, an electrode assembly is provided on the front of the spot welding machine body and located between the fixed frame and the support frame, a collection box fixedly connected to one side of the spot welding machine body, a negative pressure cylinder fixedly connected to the back of the collection box, a negative pressure component is provided inside the negative pressure cylinder, an air suction component is provided on the front of the collection box, an installation groove opened on one side of the collection box, a filter plate is movably installed inside the installation groove, an installation block is fixedly connected to one side of the collection box, and an installation component for fixing the filter plate is provided inside the installation block.

[0007] The fixed frame and support frame serve as the core load-bearing framework, fixing the cylinder and adjusting components to ensure the vertical alignment accuracy of the upper and lower welding guns. The cylinder drives the fixed seat to move vertically, causing the upper welding gun to quickly press against the sheet metal parts. The filter plate frame is made of rubber, which can be firmly fixed in the mounting groove. At the same time, when the filter plate absorbs smoke, it first passes through a PTFE membrane to intercept submicron particles and withstand high-temperature smoke. Then it passes through the activated carbon layer on the other side of the filter plate to adsorb volatile organic compounds and harmful gases, thereby purifying the welding gases.

[0008] As a further description of the above technical solution:

[0009] The adjustment assembly includes a threaded plate fixedly installed between the two sides of the inner wall of the support frame, and the threaded plate has a threaded rod connected internally.

[0010] As a fixed base for the threaded rod, it achieves a self-locking function through the threaded pair, preventing the lower welding gun from shifting due to welding vibration. It replaces the traditional pneumatic stroke adjustment, realizing stepless precision adjustment, and is suitable for rapid adaptation of sheet metal parts of different thicknesses.

[0011] As a further description of the above technical solution:

[0012] An adjusting wheel is fixedly connected to the bottom end of the threaded rod, and two guide rods slide through the inside of the threaded plate.

[0013] The top end of the guide rod is fixedly connected to the second fixed seat, and the top end of the threaded rod is rotatably connected to the bottom of the second fixed seat. The threaded rod is driven to rotate by manually rotating the adjusting wheel, and the rotational motion is converted into the vertical displacement of the second fixed seat under the action of the guide rod.

[0014] As a further description of the above technical solution:

[0015] The electrode assembly includes two electrode arms, one of which is movably mounted in a groove on the front of the spot welding machine body, and the other electrode arm is slidably mounted in a groove on the front of the spot welding machine body.

[0016] One end of each of the two motor arms is fixedly connected to fixed base one and fixed base two respectively by bolts.

[0017] As a further description of the above technical solution:

[0018] The negative pressure assembly includes a negative pressure motor that is fixedly installed inside the negative pressure cylinder by a bracket, and a negative pressure fan is fixedly connected to the output end of the negative pressure motor.

[0019] The negative pressure motor provides power to drive the negative pressure fan to rotate at high speed, generating continuous negative pressure. The negative pressure fan accelerates the airflow through centrifugal force, forming a directional airflow channel from the dust collection hood to the collection box.

[0020] As a further description of the above technical solution:

[0021] The air intake assembly includes an air collection cylinder fixedly installed on the front of the collection box, and one end of the air collection cylinder is fixedly connected to a dust collection hood via a connecting pipe and a bracket.

[0022] The dust collection hood features a flared design to expand the dust collection range and cover the welding spatter area. The air collection cylinder uses a variable diameter structure to balance the airflow speed and prevent dust from accumulating inside the pipe.

[0023] As a further description of the above technical solution:

[0024] The mounting assembly includes a fixing groove formed inside the mounting block, and a snap-fit ​​rod is slidably connected inside the fixing groove.

[0025] The locking rod uses spring preload to quickly lock or release the filter plate without the need for tools.

[0026] As a further description of the above technical solution:

[0027] A pusher plate is fixedly connected to the outer wall of the snap-fit ​​rod and inside the fixing groove, and a spring is fixedly connected to one side of the pusher plate and to the outer wall of the snap-fit ​​rod.

[0028] One end of the snap-fit ​​rod is adapted to the through hole on the filter plate, and the spring provides a restoring force to the snap-fit ​​rod, ensuring that the snap-fit ​​rod can automatically return to its original position after adjustment, thereby firmly fixing the filter plate.

[0029] This utility model has the following beneficial effects:

[0030] 1. Compared with existing technologies, this spot welding machine for sheet metal processing, through the coordinated use of structures such as the movable groove, fixed seat II, lower welding gun and adjustment components, can achieve precise adjustment of the position of the lower welding gun through the mechanical linkage design of the threaded rod and guide rod, ensuring better electrode contact effect and avoiding quality problems such as incomplete welding and insufficient penetration caused by differences in sheet metal thickness. At the same time, the rotary adjustment wheel replaces the traditional cylinder stroke adjustment, eliminating the need for complex parameter settings or pneumatic system maintenance. Operators can quickly adapt to sheet metal parts of different thicknesses, reducing the operating threshold.

[0031] 2. Compared with existing technologies, this spot welding machine for sheet metal processing, through the combined use of structures such as a collection box, negative pressure cylinder, filter plate, and negative pressure components, can drive a negative pressure fan to rotate and draw in welding fumes. These fumes are then filtered and purified by the filter plate, thereby greatly improving the working environment, reducing the risk of operators being exposed to harmful substances, improving the quality of the workshop environment, and meeting stringent environmental protection requirements. At the same time, the spring reset locking rod structure enables tool-free disassembly and assembly of the filter plate, significantly reducing downtime and improving the operating efficiency of the production line. Attached Figure Description

[0032] Figure 1 This is a three-dimensional schematic diagram of the overall structure of a spot welding machine for sheet metal processing proposed in this utility model;

[0033] Figure 2 This is a three-dimensional schematic diagram of the overall structure of a spot welding machine for sheet metal processing proposed in this utility model from another perspective.

[0034] Figure 3 This is a three-dimensional schematic diagram of the adjustment component structure of a spot welding machine for sheet metal processing proposed in this utility model;

[0035] Figure 4 This is a three-dimensional schematic diagram of the negative pressure component and air intake component of a spot welding machine for sheet metal processing proposed in this utility model.

[0036] Figure 5 This is a three-dimensional schematic diagram of the installation component structure of a spot welding machine for sheet metal processing proposed in this utility model.

[0037] Legend:

[0038] 1. Spot welding machine body; 2. Fixing frame; 3. Support frame; 4. Cylinder; 5. Fixing seat one; 6. Upper welding gun; 7. Movable groove; 8. Fixing seat two; 9. Lower welding gun; 10. Collection box; 11. Negative pressure cylinder; 12. Mounting groove; 13. Filter plate; 14. Mounting block; 15. Threaded plate; 16. Threaded rod; 17. Adjusting wheel; 18. Guide rod; 19. Electrode arm; 20. Negative pressure motor; 21. Negative pressure fan; 22. Air collection cylinder; 23. Dust collection hood; 24. Fixing groove; 25. Clamping rod; 26. Push plate; 27. Spring. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] Reference Figure 1-5This utility model provides a spot welding machine for sheet metal processing: It includes a spot welding machine body 1. A fixed frame 2 and a support frame 3 are fixedly connected to the front of the spot welding machine body 1. A cylinder 4 is fixedly installed on one side of the fixed frame 2. A fixed seat 5 is fixedly connected to the telescopic end of the cylinder 4. An upper welding gun 6 is installed inside the fixed seat 5. A movable groove 7 is opened on the top of the support frame 3. A second fixed seat 8 is fixedly connected to the top of the movable groove 7. A lower welding gun 9 is installed inside the second fixed seat 8. An adjustment mechanism is provided between the two sides of the inner wall of the support frame 3 to drive the lower welding gun 9 to move. The components include an electrode assembly located on the front of the spot welding machine body 1, between the fixed frame 2 and the support frame 3; a collection box 10 fixedly connected to one side of the spot welding machine body 1; a negative pressure cylinder 11 fixedly connected to the back of the collection box 10; a negative pressure assembly inside the negative pressure cylinder 11; an air suction assembly on the front of the collection box 10; an installation groove 12 on one side of the collection box 10; a filter plate 13 movably installed inside the installation groove 12; and an installation block 14 fixedly connected to one side of the collection box 10, with a mounting mechanism inside the installation block 14 for fixing the filter plate 13. The assembly includes a fixed frame 2 and a support frame 3 as the core load-bearing frame, a fixed cylinder 4 and an adjustment component to ensure the vertical alignment accuracy of the upper welding gun 6 and the lower welding gun 9. The cylinder 4 drives the fixed seat 5 to move vertically, causing the upper welding gun 6 to quickly press against the sheet metal parts. The frame material of the filter plate 13 is made of rubber, which can be firmly fixed in the mounting groove 12. When the filter plate 13 absorbs smoke, it first passes through a PTFE membrane to intercept submicron particles and withstand high-temperature smoke and dust. Then it passes through the activated carbon layer on the other side of the filter plate 13 to adsorb volatile organic compounds and harmful gases. The system purifies the welding gas. Through the coordinated use of structures such as the movable groove 7, fixed seat 8, lower welding gun 9, and adjustment components, the position of the lower welding gun 9 can be precisely adjusted through the mechanical linkage design of the threaded rod 16 and the guide rod 18. This ensures good electrode contact and avoids quality problems such as incomplete welding and insufficient penetration caused by differences in sheet metal thickness. At the same time, the rotary adjustment wheel 17 replaces the traditional cylinder 4 stroke adjustment, eliminating the need for complex parameter settings or pneumatic system maintenance. Operators can quickly adapt to sheet metal parts of different thicknesses, reducing the operational threshold.

[0041] The adjustment assembly includes a threaded plate 15 fixedly installed between the two sides of the inner wall of the support frame 3. The threaded plate 15 has a threaded rod 16 connected to its internal thread, which serves as the fixed base for the threaded rod 16. The threaded pair achieves a self-locking function to prevent the lower welding gun 9 from shifting due to welding vibration. It replaces the traditional pneumatic stroke adjustment and achieves stepless precision adjustment, suitable for rapid adaptation of sheet metal parts of different thicknesses. An adjustment wheel 17 is fixedly connected to the bottom of the threaded rod 16. Two guide rods 18 slide through the inside of the threaded plate 15. The top of the guide rod 18 is fixedly connected to the second fixed seat 8, and the top of the threaded rod 16 is rotatably connected to the bottom of the second fixed seat 8. Manually rotating the adjustment wheel 17 drives the threaded rod 16 to rotate, and under the action of the guide rod 18, the rotational motion is converted into the vertical displacement of the second fixed seat 8.

[0042] The electrode assembly includes two electrode arms 19. One electrode arm 19 is movably mounted in a groove on the front of the spot welding machine body 1, and the other electrode arm 19 is slidably mounted in a groove on the front of the spot welding machine body 1. One end of the two electrode arms is fixedly connected to the fixing seat 5 and the fixing seat 8 respectively by bolts.

[0043] The negative pressure assembly includes a negative pressure motor 20 fixedly installed inside the negative pressure cylinder 11 by a bracket. The output end of the negative pressure motor 20 is fixedly connected to a negative pressure fan 21. The negative pressure motor 20 provides power to drive the negative pressure fan 21 to rotate at high speed, generating continuous negative pressure. The negative pressure fan 21 accelerates the airflow through centrifugal force, forming a directional airflow channel from the dust collection hood 23 to the collection box 10.

[0044] The suction assembly includes an air collection cylinder 22 fixedly installed on the front of the collection box 10. One end of the air collection cylinder 22 is fixedly connected to a dust collection hood 23 through a connecting pipe and a bracket. The dust collection hood 23 adopts a flared design to expand the dust collection range and cover the welding spatter area. The air collection cylinder 22 balances the airflow speed through a variable diameter structure to prevent smoke and dust from accumulating in the pipe.

[0045] The mounting components include a fixing groove 24 inside the mounting block 14, and a locking rod 25 is slidably connected inside the fixing groove 24. The locking rod 25 achieves quick locking or releasing of the filter plate 13 by the pre-tightening force of the spring 27 without the need for tools. A push plate 26 is fixedly connected to the outer wall of the locking rod 25 inside the fixing groove 24. A spring 27 is fixedly connected to one side of the push plate 26 and to the outer wall of the locking rod 25. One end of the locking rod 25 is adapted to the through hole on the filter plate 13. The spring 27 provides a restoring force for the locking rod 25, ensuring that the locking rod 25 can automatically return to its original position after adjustment, thereby firmly fixing the filter plate 13.

[0046] Working principle: During use, the height of the welding machine can be adjusted according to the thickness of the sheet metal parts. The operator only needs to rotate the adjusting wheel 17 located at the bottom of the support frame 3, so that the adjusting wheel 17 drives the threaded rod 16 to rotate. Under the limit of the guide rod 18 on the threaded plate 15, the fixed seat 8 moves, which in turn drives the lower welding gun 9 to move, thereby adjusting the distance between the lower welding gun 9 and the upper welding gun 6. This adapts to sheet metal parts of different thicknesses, making it convenient to accurately adjust the welding spacing, thereby optimizing the contact effect of the electrodes and avoiding welding quality problems caused by inconsistent thickness. Compared with the traditional method of adjusting the extension and retraction stroke of the cylinder 4, the operation of adjusting the height of the welding machine is more intuitive and efficient, reducing the need for complex operations and improving production efficiency.

[0047] Simultaneously, during welding, the negative pressure motor 20 inside the negative pressure cylinder 11 can be activated, causing its output end to rotate and drive the fixed negative pressure fan 21 to rotate. The fan blades on the negative pressure fan 21 generate suction, which in turn causes the dust collection hood 23 to generate suction, thereby absorbing the fumes generated during welding. The fumes pass through the dust collection hood 23 into the connecting pipe, and then through the air collection cylinder 22 into the collection box 10. In the collection box 10, particulate matter is filtered and intercepted by the PTFE membrane covering the filter plate 13. Simultaneously, an activated carbon layer is installed on the other side of the filter plate 13 to adsorb harmful gases, thus effectively improving the working environment, protecting the health of operators, and also helping to improve the environmental quality of the workshop, meeting stricter environmental protection requirements. Then, when cleaning is required... Workers only need to pull the locking rod 25 on the mounting block 14 to move one end out of the through hole on the filter plate 13, thus releasing the fixation. After cleaning or replacing the filter plate 13, workers only need to pull the locking rod 25 to make the external pushing disc 26 compress the spring 27, and then align the filter plate 13 with the mounting groove 12 and insert it into the collection box 10. When the locking rod 25 is aligned with the through hole on the filter plate 13, the locking rod 25 can be released. Under the action of the spring 27, it drives the pushing disc 26 to return the locking rod 25 to its original position, thus fixing the filter plate 13. This eliminates the need for workers to use complicated tools for maintenance and adjustment, greatly reducing the time required for equipment downtime and maintenance, and improving the operating efficiency of the production line.

[0048] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 welder for sheet metal working, comprising a spot welder body (1), characterized in that: The front of the spot welding machine body (1) is fixedly connected to a fixed frame (2) and a support frame (3). A cylinder (4) is fixedly installed on one side of the fixed frame (2). A fixed seat (5) is fixedly connected to the telescopic end of the cylinder (4). An upper welding gun (6) is installed inside the fixed seat (5). A movable groove (7) is opened on the top of the support frame (3). A fixed seat (8) is fixedly connected to the top of the movable groove (7). A lower welding gun (9) is installed inside the fixed seat (8). An adjustment component capable of driving the lower welding gun (9) to move is provided between the two sides of the inner wall of the support frame (3). The front of the spot welding machine body (1) and An electrode assembly is provided between the fixed frame (2) and the support frame (3). A collection box (10) is fixedly connected to one side of the spot welding machine body (1). A negative pressure cylinder (11) is fixedly connected to the back of the collection box (10). A negative pressure assembly is provided inside the negative pressure cylinder (11). An air suction assembly is provided on the front of the collection box (10). An installation groove (12) is provided on one side of the collection box (10). A filter plate (13) is movably installed inside the installation groove (12). An installation block (14) is fixedly connected to one side of the collection box (10). An installation assembly for fixing the filter plate (13) is provided inside the installation block (14).

2. The spot welder for sheet metal working according to claim 1, characterized in that: The adjustment assembly includes a threaded plate (15) fixedly installed between the two sides of the inner wall of the support frame (3). The threaded plate (15) is internally threaded with a threaded rod (16), and the top end of the threaded rod (16) is rotatably connected to the bottom of the fixed seat (8).

3. The spot welder for sheet metal working according to claim 2, characterized in that: An adjusting wheel (17) is fixedly connected to the bottom end of the threaded rod (16), and two guide rods (18) slide through the inside of the threaded plate (15). The top end of the guide rod (18) is fixedly connected to the second fixed seat (8).

4. The spot welder for sheet metal working according to claim 1, characterized in that: The electrode assembly includes two electrode arms (19), one of which is movably mounted in a groove on the front of the spot welding machine body (1), and the other electrode arm (19) is slidably mounted in a groove on the front of the spot welding machine body (1).

5. The spot welder for sheet metal working according to claim 1, characterized in that: The negative pressure assembly includes a negative pressure motor (20) fixedly installed inside the negative pressure cylinder (11) by a bracket, and a negative pressure fan (21) is fixedly connected to the output end of the negative pressure motor (20).

6. The spot welder for sheet metal working according to claim 1, characterized in that: The air intake assembly includes an air collection cylinder (22) fixedly installed on the front of the collection box (10), and one end of the air collection cylinder (22) is fixedly connected to a dust collection hood (23) through a connecting pipe and a bracket.

7. The spot welder for sheet metal working according to claim 1, characterized in that: The mounting assembly includes a fixing groove (24) formed inside the mounting block (14), and a snap-fit ​​rod (25) is slidably connected inside the fixing groove (24).

8. The spot welder for sheet metal working according to claim 7, characterized in that: A pusher plate (26) is fixedly connected to the outer wall of the snap-fit ​​rod (25) and inside the fixing groove (24). A spring (27) is fixedly connected to one side of the pusher plate (26) and the outer wall of the snap-fit ​​rod (25). One end of the snap-fit ​​rod (25) is adapted to the through hole on the filter plate (13).

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