Automatic welding device for automobile scale processing

Abstract

The application belongs to the technical field of welding devices, and specifically discloses an automatic welding device for automobile scale processing, which comprises a workbench, a Y-axis driving mechanism, a gantry sliding table, an X-axis driving mechanism, a scale table and a reinforcing plate. The X-axis driving mechanism is provided with two groups and is arranged on the two sides of the workbench. The gantry sliding table is arranged above the X-axis driving mechanism through the sliding seat on the bottom. The Y-axis driving mechanism is connected with an electric arc welding mechanism through a Z-axis sliding seat. The electric arc welding mechanism is connected with a double-head electric arc gun at the lower end. The scale table is arranged above the workbench. The reinforcing plate is arranged at the bottom of one side of the scale table. The application realizes dynamic follow-up tensioning of the workpiece in the welding process, effectively avoids welding defects, integrates the functions of physical isolation of splashing and efficient absorption of smoke dust sources, improves the operation safety and environmental cleanliness, has high automation, greatly improves the welding efficiency, quality and consistency, and is suitable for the automatic welding operation of the scale table and the reinforcing plate of the automobile scale.

Description

Technical Field

[0001] This invention belongs to the field of welding equipment technology, and specifically discloses an automatic welding device for processing truck scales. Background Technology

[0002] In the manufacturing process of truck scales (electronic truck scales), the weighing platform, as a key component that directly bears the vehicle load, directly affects the overall weighing accuracy and service life of the machine. To improve the bending stiffness of the weighing platform and rationally distribute stress, multiple sets of reinforcing plates are usually welded to its bottom. Among them, some reinforcing plates have a trapezoidal structure in their front view, that is, their cross-section along the longitudinal direction of the weighing platform is a trapezoidal shape that is narrower at the top and wider at the bottom, or vice versa. This type of trapezoidal reinforcing plate has advantages in load-bearing performance, but when welding it to the bottom surface of the weighing platform, due to the beveled or asymmetrical features of its own contour, it places higher requirements on the placement and positioning before welding.

[0003] However, existing technologies for welding trapezoidal reinforcing plates to the weighing platform suffer from the following technical defects: Due to the slanted and asymmetrical features of the trapezoidal reinforcing plates, the placement, positioning, and posture adjustment before welding are extremely critical to ensure the weld trajectory matches the design requirements. Current production processes often employ manual visual alignment and simple stop block positioning methods, resulting in vague positioning benchmarks, limited accuracy, and a lack of standardized calibration. When multiple sets of trapezoidal reinforcing plates are sequentially arranged and welded along the length of the weighing platform, the positioning error of each set exists independently and accumulates. During long-distance welding at the bottom of the weighing platform, significant deviations can easily occur between the arc welding torch and the welding direction of the reinforcing plates, leading to defects such as weld misalignment and uneven weld formation. This severely affects the structural strength of the weighing platform and reduces the measurement accuracy and operational stability of the truck scale.

[0004] When welding reinforcing plates to the weighing platform using arc welding, the high-temperature arc generates a large number of high-speed molten metal droplets. The weighing platform of a truck scale is typically surrounded by densely packed critical components such as sensor cables, signal harnesses, and hydraulic lines. Existing equipment lacks effective protective structures against this spatter, and the molten droplets easily adhere to the cable sheaths, causing insulation burn-through, short circuits, or even fires, posing a significant safety risk. Continuous welding of multiple sets of reinforcing plates generates a large amount of fumes containing metal oxides. Current technology lacks dust collection devices suitable for long-stroke, multi-station welding, causing fumes to permeate the work area. This not only harms the health of operators but also easily adheres to precision components such as electrical parts and guide rails, accelerating equipment aging. Furthermore, it creates a chaotic and disorderly welding site, making clean production difficult to achieve.

[0005] In summary, there is an urgent need in this field to develop an automated welding device that can accurately align the trapezoidal reinforcing plate according to its own structural characteristics, maintain accurate weld trajectory during long-distance welding, and have spatter protection and fume collection functions, so as to improve the manufacturing quality, production safety and cleanliness of the truck scale. Summary of the Invention

[0006] The purpose of this invention is to solve the problems existing in the background art, and to propose an automatic welding device for truck scale processing, including a worktable, a Y-axis drive mechanism, a gantry slide, an X-axis drive mechanism, a weighing platform, and a reinforcing plate. Two sets of X-axis drive mechanisms are provided and installed on both sides of the worktable. The gantry slide is slidably mounted above the X-axis drive mechanisms via slide blocks on both sides of its bottom. The Y-axis drive mechanism is connected to an arc welding mechanism via a Z-axis slide block. A double-headed arc gun is connected to the lower end of the arc welding mechanism. The weighing platform is located above the worktable. The reinforcing plate is located at the bottom of one side of the weighing platform. A guide mechanism is symmetrically installed on the outside of the Z-axis slide block. A carriage is connected to one bottom side of the guide mechanism via a lifting member. An L-shaped frame is slidably connected to one side of the carriage. A positioning tensioning member is provided at one end of the L-shaped frame, and a smoke-proof and splash-proof mechanism is provided at the end of the L-shaped frame away from the positioning tensioning member.

[0007] In the above technical solution, the guiding mechanism further includes a bracket, one end of which is connected to the outside of the Z-axis slide, a guide post is fixedly connected inside the bracket, a locking rod is fixedly sleeved on the outside of the end of the guide post away from the Z-axis slide, a U-shaped frame is provided on one side of the locking rod, and the lifting member is provided inside the U-shaped frame.

[0008] In the above technical solution, the lifting component further includes a first hydraulic cylinder fixedly installed on the top wall inside the U-shaped frame. The telescopic end of the first hydraulic cylinder is connected to the upper surface of the slide. A guide rod is vertically connected inside the U-shaped frame and on the side close to the first hydraulic cylinder. The slide and the guide rod are in sliding engagement.

[0009] In the above technical solution, the positioning tensioning component further includes a rotating shaft fixedly installed at one end of the L-shaped frame, a tensioning roller rotatably connected to the outside of the rotating shaft, an elastic pressing component provided outside the tensioning roller, a second hydraulic cylinder fixedly installed on one side of the slide, the telescopic end of the second hydraulic cylinder being connected to the inner surface of the L-shaped frame, a crossbar fixedly connected to one side of the slide and below the second hydraulic cylinder, the L-shaped frame slidingly sleeved on the outside of the crossbar, and a positioning guide wheel installed on one side of the slide and near the reinforcing plate, the positioning guide wheel rolling at the bottom of the weighing platform.

[0010] In the above technical solution, the elastic pressing member further includes an arc-shaped slide rod slidably connected to one end of the L-shaped frame. The lower end of the arc-shaped slide rod is connected to the outside of the tensioning roller. An arc-shaped spring is sleeved on the outside of the arc-shaped slide rod and near the bottom. One end of the arc-shaped spring is connected to the lower surface of the L-shaped frame, and the other end is connected to the upper outside of the tensioning roller. The tensioning roller is rolled on one side of the outer surface of the reinforcing plate.

[0011] In the above technical solution, the smoke-splash prevention mechanism further includes a take-up box fixedly installed on the L-shaped frame and away from the tension roller. A take-up mechanism is rotatably installed inside the take-up box. The take-up roller of the take-up mechanism is wound with a protective blanket. Silicone boxes are embedded at equal intervals along the horizontal direction inside the lower part of the protective blanket. Multiple air suction holes are opened on the side of the silicone box facing the reinforcing plate. A weight bar is fixedly installed at the lower end of the protective blanket.

[0012] In the above technical solution, the winding box is further connected to a smoke extractor at the bottom of symmetrical connecting rods on both sides of the outside, and an external exhaust pipe is connected to one end of the smoke extractor.

[0013] In the above technical solution, a flexible connector tube is further installed inside the silicone box at the bottom, and an inhalation tube is installed at equal intervals along the horizontal direction inside the smoking device, with the inhalation tube and the flexible connector tube being movably locked together.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention, by setting up a guide mechanism, lifting component, slide, L-shaped frame and positioning tensioning component symmetrically installed on the outside of the Z-axis slide, ensures that during the welding process, the tensioning roller can always be pressed against the outer surface of the reinforcing plate under the elastic action of the arc spring. Combined with the rolling positioning of the positioning guide wheel at the bottom of the weighing platform, it achieves precise and stable tensioning of the relative position between the reinforcing plate and the weighing platform, effectively avoiding welding defects caused by workpiece loosening or uneven gaps during the welding process, and significantly improving welding quality and consistency.

[0015] 2. This invention features a fumigation and anti-splash mechanism at one end of an L-shaped frame. The winding mechanism within the winding box controls the unfolding and rewinding of the protective blanket. A silicone box with suction holes is embedded inside the protective blanket. Combined with the fumigator and suction pipe, this creates a localized negative pressure environment in the welding area. This effectively absorbs the fumes and harmful gases generated during welding and prevents welding spatter from contaminating or damaging surrounding equipment and workpiece surfaces through the physical isolation provided by the protective blanket. It is particularly suitable for welding precision workpieces such as battery connectors where high surface quality is required. Furthermore, the embedded silicone box with suction holes effectively eliminates the limitations of traditional fumigation equipment, significantly increasing the fumigation area and achieving comprehensive and efficient absorption of fumes from the welding area, thus preventing the spread of fumes and contaminating the work environment.

[0016] 3. In this invention, the lifting component and the positioning tensioning component work together. The first hydraulic cylinder drives the slide to rise and fall, while the second hydraulic cylinder drives the L-shaped frame to move horizontally. This allows the tensioning rollers and positioning guide wheels to adapt to different sizes of reinforcing plates and weighing platform structures, providing excellent process adaptability. Simultaneously, this mechanism is integrated onto the Z-axis slide and moves synchronously with the arc welding mechanism, achieving dynamic follow-up tensioning and dust removal during the welding process. It features a compact structure and a high degree of automation.

[0017] 4. This invention utilizes a silicone box embedded inside the protective blanket with an air intake hole on the welding side, combined with a movable locking structure between the flexible connector tube and the suction tube. This ensures both unobstructed smoke extraction path and easy roll-up of the protective blanket. A weighted bar at the lower end of the protective blanket ensures it always hangs down and covers the welding area when unfolded, improving the stability of the protective and smoke extraction effects. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is another schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the connection structure between the Z-axis slide, the bracket, and the smoke-proof and splash-proof mechanism of the present invention; Figure 4 This is a schematic diagram of the connection structure between the lifting component and the carriage of the present invention; Figure 5 This is a schematic diagram of the connection structure between the winding mechanism and the protective blanket of the present invention; Figure 6 This is a schematic diagram of the connection structure between the protective blanket and the silicone box of the present invention; Figure 7 This is a schematic diagram of the connection structure between the L-shaped frame and the tensioning roller of the present invention.

[0019] In the diagram: 1. Workbench; 2. Y-axis drive mechanism; 3. Gantry slide; 4. Slide; 5. Bracket; 6. Arc welding mechanism; 7. X-axis drive mechanism; 8. Weighing platform; 9. Reinforcing plate; 10. Double-headed arc gun; 11. Guide column; 12. U-shaped frame; 13. Clamping rod; 14. Guide rod; 15. Z-axis slide; 16. Positioning guide wheel; 17. Winding box; 18. Protective blanket; 19. Tensioning roller; 20. Slide; 21. First hydraulic cylinder; 22. Arc spring; 23. L-shaped frame; 24. Crossbar; 25. Second hydraulic cylinder; 26. Silicone box; 27. Connecting rod; 28. Winding mechanism; 29. ​​Smoke extractor; 30. Weight rod; 31. Flexible connector tube; 32. Suction pipe; 33. External exhaust pipe; 34. Arc slide rod; 35. Rotating shaft; 36. Suction hole. Detailed Implementation

[0020] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the invention is not limited to the specific embodiments disclosed below.

[0022] like Figures 1-7 An automatic welding device for processing truck scales is shown, including a worktable 1, a Y-axis drive mechanism 2, a gantry slide 3, an X-axis drive mechanism 7, a weighing platform 8, and a reinforcing plate 9. The X-axis drive mechanism 7 is provided in two sets and is installed on both sides of the worktable 1 respectively. The gantry slide 3 is slidably mounted above the X-axis drive mechanism 7 through the slide seats 4 on both sides of the bottom. The Y-axis drive mechanism 2 is connected to an arc welding mechanism 6 through a Z-axis slide seat 15. The lower end of the arc welding mechanism 6 is connected to a double-headed arc gun 10. The weighing platform 8 is located above the worktable 1. The reinforcing plate 9 is located at the bottom of one side of the weighing platform 8. A guide mechanism is symmetrically installed on the outside of the Z-axis slide seat 15. A slide frame 20 is connected to one side of the bottom of the guide mechanism through a lifting member. An L-shaped frame 23 is slidably connected to one side of the slide frame 20. A positioning tension member is provided at one end of the L-shaped frame 23. A smoke and splash prevention mechanism is provided at the end of the L-shaped frame 23 away from the positioning tension member. In this embodiment, an external control device drives the X-axis drive mechanism 7 and the Y-axis drive mechanism 2 to work together, causing the gantry slide 3 and the Z-axis slide 15 to move the arc welding mechanism 6 to the welding station. The lifting and positioning tensioning components pre-position and tension the reinforcing plate 9 and the weighing platform 8, ensuring the relative stability of the welding area. The double-headed arc gun 10 performs welding on both sides of the reinforcing plate 9 along a preset trajectory. Simultaneously, the fume extraction and anti-splash mechanism is activated, providing protection and dust removal in the welding area. Through this overall structural arrangement, automatic welding of the truck scale reinforcing plate 9 and the weighing platform 8 is achieved. During the welding process, positioning tensioning, welding execution, and fume extraction work in tandem, effectively improving welding efficiency and quality, avoiding defects caused by workpiece loosening or welding spatter, and enhancing the integration and automation level of the equipment.

[0023] The guiding mechanism includes a bracket 5. One end of the bracket 5 is connected to the outside of the Z-axis slide 15. A guide post 11 is fixedly connected inside the bracket 5. A locking rod 13 is fixedly sleeved on the outside of the end of the guide post 11 away from the Z-axis slide 15. A U-shaped frame 12 is provided on one side of the locking rod 13. The lifting component is located inside the U-shaped frame 12. In this embodiment, when the Z-axis slide 15 moves the arc welding mechanism 6, the bracket 5 moves synchronously with the Z-axis slide 15. The guide post 11 provides a stable connection and support for the U-shaped frame 12, and the locking rod 13 is used to limit the relative position of the U-shaped frame 12 and the guide post 11. This guiding mechanism allows the lifting component to be stably installed on the Z-axis slide 15 and to move as a whole with the Z-axis slide 15, ensuring that the lifting component is always aligned with the welding area during operation. This achieves the positioning and tensioning function and the follow-up of the welding execution mechanism, simplifying the structure and improving the positioning response speed.

[0024] The lifting component includes a first hydraulic cylinder 21 fixedly installed on the top wall inside the U-shaped frame 12. The telescopic end of the first hydraulic cylinder 21 is connected to the upper surface of the slide 20. A guide rod 14 is vertically connected inside the U-shaped frame 12 and on the side close to the first hydraulic cylinder 21. The slide 20 and the guide rod 14 are in sliding engagement. In this embodiment, the first hydraulic cylinder 21 pushes the slide 20 to move smoothly up and down along the vertical direction of the guide rod 14. The guide rod 14 provides precise sliding guidance for the slide 20, preventing swaying during the lifting process. This lifting component allows the positioning tensioning component to adapt to the different heights of the reinforcing plate 9 in the vertical direction, ensuring that the positioning guide wheel 16 and the tensioning roller 19 accurately contact the workpiece surface and maintain a stable vertical clamping force during welding. This enhances the device's adaptability to different workpiece specifications and improves the reliability and repeatability of positioning.

[0025] The positioning tensioning component includes a rotating shaft 35 fixedly installed at one end of the L-shaped frame 23, a tensioning roller 19 rotatably connected to the outside of the rotating shaft 35, an elastic pressing component provided on the outside of the tensioning roller 19, a second hydraulic cylinder 25 fixedly installed on one side of the slide 20, the telescopic end of the second hydraulic cylinder 25 being connected to the inner surface of the L-shaped frame 23, a crossbar 24 fixedly connected on one side of the slide 20 and below the second hydraulic cylinder 25, the L-shaped frame 23 slidingly sleeved on the outside of the crossbar 24, and a positioning guide wheel 16 installed on one side of the inside of the slide 20 and near the reinforcing plate 9, the positioning guide wheel 16 rolling at the bottom of the weighing platform 8; In this embodiment, the second hydraulic cylinder 25 drives the L-shaped frame 23 to slide horizontally along the crossbar 24, causing the tension roller 19 at one end of the L-shaped frame 23 to move closer to or further away from the outer side of the reinforcing plate 9. Simultaneously, the positioning guide roller 16 remains in constant rolling contact with the bottom of the weighing platform 8, achieving horizontal positioning and tensioning. Through the upper positioning and tensioning component, the relative position of the reinforcing plate 9 and the weighing platform 8 can be precisely controlled in the horizontal direction, eliminating possible lateral offsets during welding and ensuring uniform weld formation. Furthermore, the rolling contact method used by both the positioning guide roller 16 and the tension roller 19 reduces friction and wear during movement, improving positioning accuracy and service life.

[0026] The elastic pressing component includes an arc-shaped slide rod 34 that is slidably connected to one end of the L-shaped frame 23. The lower end of the arc-shaped slide rod 34 is connected to the outside of the tension roller 19. An arc-shaped spring 22 is sleeved on the outside of the arc-shaped slide rod 34 and close to the bottom. One end of the arc-shaped spring 22 is connected to the lower surface of the L-shaped frame 23, and the other end is connected to the upper outside of the tension roller 19. The tension roller 19 is rolled on the outer surface of one side of the reinforcing plate 9. In this embodiment, when the second hydraulic cylinder 25 pushes the L-shaped frame 23 to bring the tensioning roller 19 into contact with the reinforcing plate 9, the arc spring 22 is compressed. Guided by the arc slide rod 34, the tensioning roller 19 is always pressed against the surface of the reinforcing plate 9 with elastic force. Even if there are minor unevennesses on the surface of the reinforcing plate 9 or thermal deformation occurs during welding, the arc spring 22 can automatically adjust the clamping force of the tensioning roller 19 to maintain continuous and stable contact. This elastic pressing component achieves flexible tensioning of the reinforcing plate 9, avoiding workpiece surface damage or indentations that may be caused by rigid pressing, while ensuring the continuity of tension force during welding and effectively improving welding stability.

[0027] The smoke-proof splash mechanism includes a take-up box 17 fixedly installed on the side of the L-shaped frame 23 away from the tension roller 19. A take-up mechanism 28 is rotatably installed inside the take-up box 17. A protective blanket 18 is wound on the take-up roller of the take-up mechanism 28. Silicone boxes 26 are embedded at equal intervals along the horizontal direction inside the lower part of the protective blanket 18. Multiple air suction holes 36 are opened on the side of the silicone box 26 facing the reinforcing plate 9. A weight bar 30 is fixedly installed at the lower end of the protective blanket 18. In this embodiment, before welding begins, the winding mechanism 28 releases the wound protective blanket 18 under the drive of the driving component. The protective blanket 18 hangs down naturally and fully unfolds under the gravity of the lower weight rod 30, covering the side of the welding area and forming a physical isolation barrier. The high-temperature metal spatter and droplets generated during welding are effectively blocked by the protective blanket 18, preventing spatter from adhering to the surface of the weighing platform 8 and the reinforcing plate 9 and causing pollution or damage. It also prevents spatter from contacting critical components such as surrounding sensor cables and hydraulic lines, eliminating safety hazards caused by spatter. At the same time, the silicone box 26 unfolds with the protective blanket 18, and its suction hole 36 facing the welding area is directly opposite the welding fume generation point, providing a suction port close to the source for fume absorption. The flame-retardant and wear-resistant properties of the protective blanket 18 enable it to withstand the high temperature of welding and the impact of spatter, extending the service life of the components. The equidistantly arranged silicone boxes 26 ensure that the fume absorption points are evenly distributed, effectively expanding the fume absorption range and solving the problem of limited absorption range of traditional fume extraction equipment. It should be noted that the protective blanket 18 is a long strip structure made of a flexible, flame-retardant, and wear-resistant substrate; The winding mechanism 28 consists of a stepper motor and a spiral spring.

[0028] The winding box 17 is connected to a smoke extractor 29 at the bottom of symmetrical connecting rods 27 on both sides of the outside. One end of the smoke extractor 29 is connected to an external exhaust pipe 33. In this embodiment, the fumigator 29 is fixedly installed on one side and rear of the protective blanket 18 via a connecting rod 27, and connected to an external pipeline via an external exhaust pipe 33. This allows the fumigator 29 to discharge the smoke and dust it absorbs to the outside of the working area, thus ensuring a safe working environment for welding. This structure integrates the fumigator 29 with the winding box 17, which moves synchronously with the L-shaped frame 23. This ensures that the negative pressure source for fumigation is always close to the welding area, reducing the diffusion path of smoke and dust in the air, improving the dust removal effect, simplifying the pipeline layout, and enhancing the overall compactness of the equipment.

[0029] The silicone box 26 has a flexible connector tube 31 installed inside the lower part of the interior. The smoking device 29 has suction tubes 32 installed at equal intervals along the horizontal direction inside the interior of the smoking device 29. The suction tubes 32 and the flexible connector tube 31 are movably locked together. In this embodiment, when the protective blanket 18 is unfolded under the drive of the winding mechanism 28, the flexible connector tube 31 moves with the silicone box 26 and forms a movable snap-fit ​​connection with the suction tube 32 at the corresponding position on the smoke extractor 29, ensuring unobstructed smoke extraction airway. When the protective blanket 18 is rolled up, the flexible connector tube 31 disengages from the suction tube 32. The flexibility of the flexible connector tube 31 allows it to adapt to the unfolding and winding actions of the protective blanket 18 without bending or breaking the tube. The movable snap-fit ​​connection method enables rapid and automatic opening and closing of the smoke extraction airway, ensuring both the unobstructed and reliable airway for smoke absorption during welding and preventing problems such as entanglement and jamming of the tube when the protective blanket 18 is rolled up, thus improving the automation level and operational stability of the smoke extraction and anti-splash mechanism. It should be noted that the snap-fit ​​connection between the flexible connector tube 31 and the suction tube 32 is specifically that one end of the suction tube 32 is provided with an elastic buckle, and one end of the flexible connector tube 31 is provided with a groove. The snap-fit ​​between the buckle and the groove can achieve quick snap-fit ​​and quick disengagement.

[0030] Working principle: After the device is started, two sets of X-axis drive mechanisms 7 first drive the slide 4 to move horizontally to adjust the X-axis position of the gantry slide 3. The Y-axis drive mechanism 2 drives the Z-axis slide 15 and the arc welding mechanism 6 to complete the Y-axis displacement. The two work together to achieve precise pre-positioning of the welding position of the double-headed arc gun 10 on the horizontal plane. At this time, in the guide mechanism connected to the Z-axis slide 15, the bracket 5 provides connection support for the entire auxiliary mechanism. The guide column 11 and the clamping rod 13 work together to limit and fix the U-shaped frame 12, so that the lifting part is stably assembled inside the U-shaped frame 12. The guide mechanism moves synchronously with the Z-axis slide 15 to achieve follow-up coordination between the auxiliary action and the welding action. Then, according to the height specifications of the weighing platform 8 and the reinforcing plate 9, the lifting part is extended and retracted by the first hydraulic cylinder 21 inside the U-shaped frame 12. The end of the slide 20 is driven to rise and fall vertically along the guide rod 14, simultaneously adjusting the overall height of the L-shaped frame 23, the positioning tensioning component, and the smoke and splash prevention mechanism, completing the adaptive adjustment in the height direction. Then, the positioning tensioning component starts to work. The extension end of the second hydraulic cylinder 25 on one side of the slide 20 pushes the L-shaped frame 23 to slide horizontally along the crossbar 24, adjusting the relative position of the tensioning roller 19 and the reinforcing plate 9. The rotating shaft 35 ensures the rotational flexibility of the tensioning roller 19. The arc spring 22 outside the arc-shaped slide rod 34 provides continuous elastic resistance, ensuring that the tensioning roller 19 is always tightly pressed against the outer surface of the reinforcing plate 9. At the same time, the positioning guide wheel 16 inside the slide 20 rolls and positions itself at the bottom of the weighing platform 8, eliminating the assembly gap between workpieces and preventing workpiece loosening and displacement during welding. Before welding, the smoke and splash prevention mechanism is activated. The winding mechanism 28 inside the winding box 17 releases the wound protective blanket 18. The weighted rod 30 at the lower end of the protective blanket 18 allows it to hang down naturally and completely cover the welding operation area, preventing welding spatter from contaminating the workpiece surface and surrounding equipment through physical isolation. Then, the arc welding mechanism 6 drives the double-headed arc gun 10 to perform arc welding on the connection between the reinforcing plate 9 and the weighing platform 8. During the welding process, the fume extraction and anti-splash mechanism simultaneously absorbs the fumes. Multiple suction holes 36 on the welding side of the silicone box 26 create a local negative pressure in the welding area. The fumes and harmful gases generated during welding enter the silicone box 26 through the suction holes 36, and are then transported to the suction pipe 32 of the fume extractor 29 through the flexible connector pipe 31. Finally, the fumes are discharged by the fume extractor 29 through the external exhaust pipe 33, realizing the elimination of fumes. After efficient collection and processing, once the welding operation at a single point is completed, the winding mechanism 28 drives the winding roller to slightly wind up the protective blanket 18. The X-axis drive mechanism 7 and the Y-axis drive mechanism 2 then work together again to adjust the arc welding mechanism 6 to the next welding point. The lifting and positioning tensioning components repeatedly adjust their height and horizontal position according to the size requirements of the new welding position, achieving continuous automated welding of different parts of the truck scale. After the entire device completes the welding operation, each drive mechanism resets. The first hydraulic cylinder 21 and the second hydraulic cylinder 25 drive the slide 20 and the L-shaped frame 23 back to their initial positions. The tensioning roller 19 releases its pressure on the reinforcing plate 9, the positioning guide wheel 16 separates from the weighing platform 8, and the winding mechanism 28 completely winds up the protective blanket 18 into the winding box 17. The device returns to its initial standby state.Waiting for the next welding operation to begin.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. An automatic welding device for processing truck scales, comprising a worktable (1), a Y-axis drive mechanism (2), a gantry slide (3), an X-axis drive mechanism (7), a weighing platform (8), and a reinforcing plate (9), characterized in that, The X-axis drive mechanism (7) is provided in two sets and is installed on both sides of the workbench (1). The gantry slide (3) is slidably mounted above the X-axis drive mechanism (7) through the slide seats (4) on both sides of the bottom. The Y-axis drive mechanism (2) is connected to the arc welding mechanism (6) through the Z-axis slide seat (15). The lower end of the arc welding mechanism (6) is connected to the double-headed arc gun (10). The weighing platform (8) is located above the workbench (1). The reinforcing plate (9) is located at the bottom of one side of the weighing platform (8). The Z-axis slide seat (15) is symmetrically equipped with a guide mechanism. The bottom of one side of the guide mechanism is connected to the slide frame (20) through the set lifting part. The slide frame (20) is slidably connected to one side of the slide frame (20). One end of the L-shaped frame (23) is provided with a positioning tensioning part. The end of the L-shaped frame (23) away from the positioning tensioning part is provided with a smoke-proof and splash-proof mechanism.

2. The automatic welding device for processing truck scales according to claim 1, characterized in that, The guiding mechanism includes a bracket (5), one end of which is connected to the outside of the Z-axis slide (15). A guide post (11) is fixedly connected inside the bracket (5). A locking rod (13) is fixedly sleeved on the outside of the end of the guide post (11) away from the Z-axis slide (15). A U-shaped frame (12) is provided on one side of the locking rod (13). The lifting component is located inside the U-shaped frame (12).

3. The automatic welding device for processing truck scales according to claim 2, characterized in that, The lifting component includes a first hydraulic cylinder (21) fixedly installed on the top wall inside the U-shaped frame (12). The telescopic end of the first hydraulic cylinder (21) is connected to the upper surface of the slide (20). A guide rod (14) is vertically connected inside the U-shaped frame (12) and on the side close to the first hydraulic cylinder (21). The slide (20) and the guide rod (14) slide together.

4. The automatic welding device for processing truck scales according to claim 1, characterized in that, The positioning tensioning component includes a rotating shaft (35) fixedly installed at one end of the L-shaped frame (23). A tensioning roller (19) is rotatably connected to the outside of the rotating shaft (35). An elastic pressure member is provided on the outside of the tensioning roller (19). A second hydraulic cylinder (25) is fixedly installed on one side of the slide (20). The telescopic end of the second hydraulic cylinder (25) is connected to the inner surface of the L-shaped frame (23). A crossbar (24) is fixedly connected on one side of the slide (20) and below the second hydraulic cylinder (25). The L-shaped frame (23) is slidably sleeved on the outside of the crossbar (24). A positioning guide wheel (16) is installed on one side of the slide (20) and near the reinforcing plate (9). The positioning guide wheel (16) rolls at the bottom of the weighing platform (8).

5. The automatic welding device for processing truck scales according to claim 4, characterized in that, The elastic pressing component includes an arc-shaped slide rod (34) slidably connected to one end of the L-shaped frame (23). The lower end of the arc-shaped slide rod (34) is connected to the outside of the tension roller (19). An arc-shaped spring (22) is sleeved on the outside of the arc-shaped slide rod (34) and close to the bottom. One end of the arc-shaped spring (22) is connected to the lower surface of the L-shaped frame (23), and the other end is connected to the upper outside of the tension roller (19). The tension roller (19) is rolled on the outer surface of one side of the reinforcing plate (9).

6. The automatic welding device for processing truck scales according to claim 5, characterized in that, The smoke-proof splash prevention mechanism includes a take-up box (17) fixedly installed on the side away from the tension roller (19) of the L-shaped frame (23). A take-up mechanism (28) is rotatably installed inside the take-up box (17). A protective blanket (18) is wound around the take-up roller of the take-up mechanism (28). Silicone boxes (26) are embedded at equal intervals along the horizontal direction inside the lower part of the protective blanket (18). Multiple air suction holes (36) are opened on the side of the silicone box (26) facing the reinforcing plate (9). A weight rod (30) is fixedly installed at the lower end of the protective blanket (18).

7. An automatic welding device for processing truck scales according to claim 6, characterized in that, The winding box (17) is connected to a smoker (29) at the bottom of two symmetrical connecting rods (27) on the outside. One end of the smoker (29) is connected to an external exhaust pipe (33).

8. An automatic welding device for processing truck scales according to claim 7, characterized in that, The silicone box (26) has a flexible connector tube (31) installed inside and below. The smoking device (29) has an inhalation tube (32) installed at equal intervals along the horizontal direction inside. The inhalation tube (32) and the flexible connector tube (31) are movably locked together.

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