An automatic welding device for a wrecker body production line

Abstract

The application relates to the field of vehicle body plate welding equipment, and particularly discloses an automatic welding equipment for a wrecker vehicle body production line, which comprises a machine table, guide rails and a gantry, a sliding block is arranged on the gantry in a sliding mode, the moving direction of the sliding block is parallel to the width direction of the machine table, a mounting plate is arranged on the sliding block in a lifting mode, a first power piece for driving the mounting plate to lift is arranged on the sliding block, a welding assembly for welding a support plate and a sliding groove is arranged on the mounting plate, and a heating assembly for heating the sliding groove is arranged on the mounting plate; the application has the effects of reducing deformation in the welding process of the sliding groove and improving the flatness of the sliding groove.

Description

Technical Field

[0001] This application relates to the field of automotive body panel welding equipment, and in particular to an automatic welding equipment for a tow truck body production line. Background Technology

[0002] As the core equipment for road emergency rescue, the body structure of a wrecker vehicle determines its load-bearing capacity and operational stability. The body of a wrecker vehicle typically includes a trailer frame, a tow arm system, a toolbox, and various connecting accessories. The structural strength and rigidity of the trailer frame are directly related to the safety and reliability of the wrecker operation.

[0003] As the most important load-bearing structure of a wrecker, the trailer frame mainly consists of a base plate, multiple vertical beams welded longitudinally to the plate, transverse beams arranged and intersecting the vertical beams, and symmetrically welded grooves on the horizontal and vertical beams. Each groove comprises a bottom plate, a top plate, and a web plate, and has a C-shaped cross-section. The openings of two grooves are arranged opposite each other, providing guide tracks and limiting the movement of the trailer frame. To ensure the connection strength between the grooves and the crossbeams, multiple triangular reinforcing support plates are welded between the grooves and the crossbeams, forming a stable triangular support structure. Because the web of the chute has a large area and thin wall thickness, its structural rigidity is limited. When welding the support plates and the web of the chute, local thermal deformation of the web is likely to occur, resulting in uneven, wavy defects on the surface of the web and damaging the flatness of the chute. Furthermore, when multiple support plates are welded sequentially on the same side of the chute, the thermal stress generated by welding will gradually accumulate, causing the entire web of the chute to bend and deform towards the side where the support plates are located. In order to reduce deformation during the welding process, existing technologies usually use heating equipment such as induction heating plates and blowtorches to preheat or assist in heating the plates.

[0004] However, due to the varying thermal conductivity of different specifications of support plates and web plates, the distribution of high-temperature welding zones differs during welding. Thicker plates, with their larger heat capacity and faster heat dissipation, form narrower high-temperature welding zones. The aforementioned heating methods cannot target the welding area (high-temperature zone) and the affected area (low-temperature zone) based on their actual locations, resulting in insufficient temperature field control precision and an inability to effectively suppress the concentration and accumulation of localized thermal stress. Consequently, the guide surface of the chute track is prone to flatness degradation, causing jamming during trailer movement and posing a potential threat to the overall operational efficiency and safety of the vehicle. Therefore, improvements are urgently needed. Summary of the Invention

[0005] In order to improve the problem that deformation easily occurs during the welding process of the chute web and the support plate, which leads to jamming during subsequent use, this application provides an automatic welding equipment for a tow truck body production line.

[0006] The automatic welding equipment for a tow truck body production line provided in this application adopts the following technical solution: The machine includes a machine base, guide rails, and a gantry frame. The gantry frame is characterized by the following features: a slider is slidably mounted on the gantry frame, the sliding direction of the slider is parallel to the width direction of the machine base, an mounting plate is raised and lowered on the slider, a first power component is provided on the slider to drive the mounting plate to rise and fall, and the mounting plate is provided with a welding assembly for welding the support plate and the slide groove and a heating assembly for heating the slide groove. The welding assembly includes a welding torch rotatably mounted on the mounting plate and a first adjusting member for adjusting the working angle of the welding torch. The heating assembly includes a heating plate mounted on the mounting plate, two heating tubes symmetrically arranged on the heating plate, abutment groove on the heating plate, and a connector adapted to the abutment groove slidably mounted on the heating plate. The connector is movably pressed against the outer peripheral wall of the heating tube. The end of the heating tube near the side wall of the heating plate and the connector are respectively connected to the positive and negative terminals of an external power supply. The heating assembly also includes a driving component for moving the heating plate and a second adjusting component for adjusting the distance between the two connectors.

[0007] By adopting the above technical solution, due to the large amount of heat generated during the welding process, the temperature of the welding area is much higher than that of the weld-affected zone. The temperature difference between the welding area and the weld-affected zone causes thermal deformation of the chute web, thus affecting the overall flatness of the chute web. Therefore, temperature compensation is required for the weld-affected zone to reduce the temperature difference, thereby reducing welding deformation and improving the flatness of the chute web. Since the support plate is arranged perpendicular to the chute web, it is difficult to perform temperature compensation from the welding side of the web during the welding process. Therefore, temperature compensation can be performed from the non-welding side of the web. Furthermore, the working angle of the welding torch is closely related to the thickness and material properties of the web and support plate. Different working angles cause changes in the temperature and range of the welding area and the weld-affected zone of the web. Therefore, targeted adjustments are required.

[0008] When welding the chute and support plate, the chute and support plate are placed on the machine platform. The gantry moves the welding assembly and heating assembly along the length of the machine platform, so that the welding assembly and heating assembly are respectively moved to the welding positions of the support plate and the chute. The slider moves the welding assembly and heating assembly along the width of the machine platform. The first power component moves the mounting plate along the height, so that the welding torch welds the support plate and the chute from top to bottom. The heating plate moves synchronously with the welding torch. The heating plate heats the welding affected area, reduces the temperature difference between the welding area and the welding affected area, improves the deformation of the chute web during the welding process, and improves the flatness of the chute web.

[0009] When welding support plates and webs of different materials and thicknesses, the first adjusting component adjusts the working angle of the welding torch, and the second adjusting component moves the joint within the abutment groove of the heating plate. The joint is tightly connected to the heating tube on the heating plate. The positive and negative terminals of the external power supply are connected to one end of the heating tube and the joint, respectively. By changing the effective length of the heating tube, the heating range of the heating plate is changed, and the heating range of the heating plate corresponds to the welding influence area, thus heating the welding influence area. At the same time, the welding torch welds the support plate and the web. At the beginning or end of the welding, the driving component moves the heating plate along the width of the machine, so that the heating plate moves closer to or further away from the slide, which facilitates the heating plate to extend into slides of different specifications to heat the slide web.

[0010] Optionally, the first adjusting component includes a clamping cylinder rotatably disposed on the side of the mounting plate away from the gantry frame, the welding torch being fixedly connected to the clamping cylinder, an adjusting cylinder being raised and lowered on the mounting plate, an adjusting block being fixedly connected to the inner peripheral wall of the adjusting cylinder, an adjusting hole being provided on the inner peripheral wall of the clamping cylinder for insertion and adaptation with the adjusting block, a first adjusting rod being raised and lowered on the mounting plate, one end of the first adjusting rod being fixedly connected to the adjusting cylinder, a limiting block being fixedly connected to the first adjusting rod, and a limiting hole being provided on the mounting plate for movable adaptation with the limiting block.

[0011] By adopting the above technical solution, since the chute web and the support plate are arranged vertically, when welding the chute web and the support plate, the working angle between the welding torch and the chute web depends on the influence of factors such as the thickness and material of the support plate and the chute web.

[0012] When the working angle of the welding torch needs to be adjusted, the first adjusting rod is driven. The first adjusting rod drives the adjusting cylinder to move up and down on the mounting plate. The adjusting block on the adjusting cylinder slides and matches the adjusting hole on the clamping cylinder, thereby causing the adjusting cylinder to drive the clamping cylinder to rotate at the end of the rotating plate and adjust the working angle between the web plates of the welding torch slide. The limiting hole and limiting groove on the mounting plate improve the stability of the movement of the first adjusting rod.

[0013] Optionally, the driving component includes a receiving plate slidably disposed on the mounting plate, the mounting plate having a sliding groove, the receiving plate being movably adapted to the sliding groove, the moving direction of the receiving plate being parallel to the width direction of the machine tool, the heating plate being disposed on the end of the receiving plate away from the gantry frame, and the mounting plate being provided with a second power component for driving the receiving plate to move.

[0014] By adopting the above technical solution, since the chute is made of C-shaped channel steel, and the heating plate needs to extend into the chute to heat it, when the support plate is welded to the chute web, the second power component pushes the receiving plate to move in the sliding groove on the mounting plate, causing the heating plate to move away from the welding torch along the width of the machine, increasing the distance between the welding torch and the heating plate. The first power component drives the mounting plate to descend, thereby moving the welding and heating plate to the welding position on the chute web. The second power component pushes the receiving plate to move, causing the heating plate to move closer to the welding torch, thus extending the heating plate into the chute. Since the thickness of the chute web is different, when it is necessary to adjust the distance between the welding torch and the chute, the slide table moves the mounting plate along the width of the machine, thereby moving the welding torch and the heating plate simultaneously. Then, by moving the receiving plate through the screw, the distance between the welding torch and the welding side of the chute and the distance between the heating plate and the non-welding side of the chute can be adjusted.

[0015] Since multiple support plates need to be welded onto the web of the chute, when welding the next support plate, the mounting plate moves the welding torch away from the support plate, while the distance between the heating plate and the non-welded side of the chute remains constant. This effectively reduces the changes in heating effect and heating range caused by changes in the distance between the heating plate and the non-welded side of the chute, thus improving the stability of heating.

[0016] Optionally, the second adjusting component includes a second adjusting rod slidably disposed on the receiving plate, the moving direction of the second adjusting rod being parallel to the height direction of the machine platform, a first rack fixedly connected to the end of the second adjusting rod away from the receiving plate, a driving wheel rotatably disposed on the receiving plate meshing with the first rack, a push rod slidably disposed on the receiving plate, the moving direction of the push rod being parallel to the width direction of the machine platform, a second rack fixedly connected to the end of the push rod away from the heating plate, a driven wheel rotatably disposed on the receiving plate meshing with the second rack, a rotating rod coaxially fixedly connected to the driving wheel, the end of the rotating rod away from the driving wheel coaxially fixedly connected to the driven wheel, a sliding rod fixedly connected to both joints, a connecting rod slidably and rotatably disposed on the sliding rod, the end of the connecting rod away from the heating plate being rotatably disposed on the push rod, and the heating assembly further includes a synchronizing component for driving the first adjusting rod and the second adjusting rod to move.

[0017] By adopting the above technical solution, when welding different specifications and models of car bodies, the materials and thicknesses of the groove and support plate are different. When the heat generated during the welding process diffuses in grooves of different thicknesses and materials, the range of the welding area is different. Therefore, when heating the area affected by welding, it is necessary to change the heating range, reduce the overheating of the welding area by the heating plate, and improve the flatness of the groove web.

[0018] When adjusting the heating range on the heating plate, the synchronizing element drives the second adjusting rod to move along the height direction of the machine. The first rack on the second adjusting rod drives the driving wheel to rotate. The driving wheel drives the driven wheel to rotate through the rotating rod. The driven wheel meshes with the second rack and drives the second rack to move. The movement of the second rack drives the push rod to move along the width direction of the machine. The push rod drives the two connecting rods to rotate, thereby changing the angle between the two connecting rods and pushing the slide rod to move along the length direction of the machine. The slide rod drives the joint to move in the abutment groove of the heating plate, so that the joint abuts with the heating tube at different positions, thereby changing the effective heating range of the heating tube.

[0019] Optionally, the synchronization component includes a drive plate slidably disposed on the mounting plate, the drive plate having a guide groove, the end of the first adjusting rod away from the welding gun being fixedly connected to the drive plate, the end of the second adjusting rod away from the heating plate being slidably engaged in the guide groove, and a third power component being disposed on the mounting plate, the output end of the third power component being fixedly connected to the drive plate.

[0020] By adopting the above technical solution, when it is necessary to adjust the welding torch angle and the heating area on the heating plate, the third power component is activated. The third power component drives the drive plate to move along the height of the machine platform. The drive plate drives the first adjusting rod to move. The first adjusting rod adjusts the working angle between the welding torch and the chute web. The drive plate drives the second adjusting rod to move. When the drive component drives the heating plate to move along the width direction of the machine platform, the end of the second adjusting rod away from the heating plate slides in the guide groove. The position of the adjusting joint on the heating plate is changed, thereby changing the heating area of ​​the heating plate, so that the heating plate heats the welding affected area, reducing the temperature difference between the welding area and the welding affected area, thereby reducing the deformation of the chute web.

[0021] Optionally, a fixing rod is fixedly connected to the heating plate, and abutment plates are fixedly connected to both ends of the fixing rod. The abutment plate has fixing holes that are movably adapted to the fixing plate, and an elastic element is sleeved on the fixing rod.

[0022] By adopting the above technical solution, since heat diffusion takes a certain amount of time during the welding process, and the height of the chute web is greater than the height of the support plate, and the length of the weld is less than the height of the web, there are welded and non-welded parts on the web in the height direction during the welding process. In order to reduce the deformation between the welded and non-welded parts of the chute web and to make up for the time required for heat diffusion, the heating plate needs to heat the non-welded parts of the web, and the heating should be done earlier than the welding torch heating the welding area.

[0023] When welding the support plate and the chute, the welding torch is positioned in the middle of the heating plate, which is the initial state. The first power component moves the mounting plate downwards, thereby moving the welding torch and the heating plate from top to bottom. The heating plate first abuts against the bottom of the chute. The mounting plate continues to move the welding torch to weld the support part to the bottom of the chute. The welding torch and the heating plate undergo relative displacement, and the fixing rod on the heating plate moves in the fixing hole of the receiving plate. When the welding is completed, the welding torch is located at the bottom of the heating plate. At this time, the elastic element at the bottom of the heating plate is in a compressed state, and the elastic element at the top of the heating plate is in a stretched state. After the welding is completed, the mounting plate moves the welding torch and the heating plate away from the chute, and the heating plate returns to its initial state under the action of the elastic element; thereby heating the chute and reducing the deformation of the chute during the welding process.

[0024] Optionally, the gantry frame is provided with a third rack, the slider is rotatably provided with a first gear that meshes with the third rack, and the slider is provided with a fourth power component that drives the first gear to rotate.

[0025] By adopting the above technical solution, the fourth power component drives the first gear to rotate, the first gear meshes with the third rack, and drives the slider to move along the width direction of the machine platform, thereby driving the mounting plate to move along the width direction of the machine platform.

[0026] Optionally, a fourth rack is fixedly connected to the guide rail, and a second gear that meshes with the fourth rack is rotatably provided at both ends of the gantry frame. A fifth power component that drives the second gear to rotate is provided at both ends of the gantry frame.

[0027] By adopting the above technical solution, the fifth power component drives the second gear to rotate, and the second gear meshes with the fourth gear, thereby driving the gantry frame to move on the guide rail, so that the gantry frame moves along the length of the machine.

[0028] In summary, this application includes at least one of the following beneficial technical effects: 1. When welding the bodies of different specifications and models of clearing vehicles, the second power component drives the drive plate to move. The drive plate adjusts the working angle of the welding torch through the combined action of the first adjusting rod, adjusting cylinder, clamping cylinder, adjusting block and adjusting hole. At the same time, the drive plate drives the second adjusting rod to move, and through the combined action of the first rack, second rack, driving wheel and driven wheel, drives the push rod to move. The push rod pushes the connecting rod to move. The connecting rod pushes the joint to move in the abutment groove of the heating plate through the sliding rod, thereby adjusting the effective heating area of ​​the heating plate and making the heating area of ​​the heating plate correspond to the welding influence area of ​​the slide. The heating plate heats the welding influence area, thereby reducing the temperature difference between the welding area and the welding influence area, reducing the welding deformation of the slide, and improving the flatness of the slide. 2. When welding the support plate and the chute, the heating area formed by the two heating tubes on the heating plate corresponds to the welding influence area on both sides of the chute weld. By heating the welding influence area, the overheating of the chute welding area is reduced, thereby reducing the risk of cracks caused by overheating of the weld and improving the connection performance between the chute and the support plate. 3. When adjusting the working angle of the welding torch and the position of the joint on the heating plate, the second power component drives the drive plate to move. The drive plate drives the first adjustment component and the second adjustment component to adjust the working angle of the welding torch and the position of the joint on the heating plate, respectively. Compared with directly using a power source to drive the working angle of the welding torch and the joint to move, this equipment effectively reduces the arrangement of power sources, lowers costs, and at the same time, the power source is far away from the high-temperature area, which improves the stability of the equipment. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a partial structural schematic diagram of an embodiment of this application; Figure 3 This is a partial structural schematic diagram of the heating assembly used in the embodiments of this application; Figure 4 This is an exploded view used in the embodiments of this application to show the adjusting block and the adjusting hole; Figure 5 yes Figure 3 A partial structural diagram from another perspective; Figure 6 This is a schematic diagram illustrating the structure of the heating plate in an embodiment of this application.

[0030] Reference numerals: 1. Machine base; 11. Guide rail; 12. Gantry frame; 13. Slider; 14. Mounting plate; 15. First power component; 161. Third rack; 162. First gear; 163. Fourth power component; 171. Fourth rack; 172. Second gear; 173. Fifth power component; 2. Welding assembly; 21. Welding torch; 22. First adjusting rod; 23. Clamping cylinder; 231. Adjusting hole; 24. Adjusting cylinder; 25. Adjusting block; 26. Limiting block; 27. Limiting hole; 3. Heating component; 31. Heating plate; 311. Heating tube; 312. Abutment groove; 313. Connector; 314. Fixing rod; 315. Abutment plate; 316. Elastic element; 321. Support plate; 322. Sliding groove; 323. Second power component; 331. Second adjusting rod; 332. First rack; 333. Driving wheel; 334. Rotating rod; 335. Driven wheel; 336. Push rod; 337. Second rack; 338. Slide rod; 339. Connecting rod; 341. Drive plate; 342. Guide groove; 343. Third power component. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0032] This application discloses an automated welding device for a tow truck body production line. (Refer to...) Figure 1 and Figure 2 The automatic welding equipment for the tow truck body production line includes a machine base 1. A controller, such as a programmable logic controller (PLC) or a dedicated motion controller, is installed on the machine base 1. A vehicle body is placed on the machine base 1. Guide rails 11 are installed on both sides of the machine base 1. A fourth rack 171 is fixedly connected to the guide rails 11. A gantry frame 12 is slidably mounted on the guide rails 11. A fifth power component 173 is installed on the gantry frame 12. A second gear 172 is fixedly connected to the output end of the fifth power component 173. The second gear 172 meshes with the fourth rack 171. The direction of movement of the gantry frame 12 is parallel to the length direction of the machine base 1. A third rack 16 is fixedly connected to the gantry frame 12. 1. A slider 13 is slidably mounted on the gantry frame 12. A fourth power component 163 is fixedly connected to the slider 13. A first gear 162 is coaxially fixed to the output end of the fourth power component 163. The first gear 162 meshes with a third rack 161. The fourth power component 163 and the fifth power component 173 are servo motors, stepper motors, etc., and the power of the fifth power component 173 is greater than that of the fourth power component 163. A mounting plate 14 is raised and lowered on the slider 13. A first power component 15 is mounted on the slider 13. The first power component 15 can be a cylinder, an electric telescopic rod, a motor screw structure, etc. The output end of the first power component 15 is mounted on the mounting plate 14. When the first power component 15 is a motor screw structure, the motor is fixedly connected to the slider 13, and the screw is rotatably mounted on the slider 13. The output end of the motor is coaxially fixed to the screw. The mounting plate 14 is threadedly connected to the screw and a guide rod is fixedly connected to the slider 13. A guide hole is provided on the mounting plate 14 to slide and adapt to the guide rod. The first power component 15, the fourth power component 163, and the fifth power component 173 are all electrically connected to the controller; the mounting plate 14 is provided with a welding assembly 2 for welding the support plate and a heating assembly 3 for heating the slide.

[0033] When the support plate is welded onto the slide chute, the controller controls the start and stop of the first power component 15, the fourth power component 163, and the fifth power component 173. The fifth power component 173 drives the second gear 172 to rotate, and the second gear 172 meshes with the fourth rack 171, thereby moving the gantry frame 12 along the length of the machine base 1 and moving the welding assembly 2 and heating assembly 3 on the mounting plate 14 to the welding position of the support plate and the slide chute. The fourth power component 163 starts, and the fourth power component 163 drives the first gear 162 to rotate, and the first gear 162 meshes with the third rack 161, thereby moving the slider 13 along the gantry frame 12 and adjusting the position of the welding assembly 2 and heating assembly 3 along the width of the machine base 1, which is convenient for welding slides of different specifications, spacings, and thicknesses. The groove is welded; the first power component 15 is started, and the first power component 15 drives the mounting plate 14 to move up and down on the slider 13, so that the welding component 2 welds the groove and the support plate, and the heating component 3 heats the welding part to reduce the deformation of the groove during the welding process; after the welding is completed, the welding component 2 can be turned off, and the heating component 3 can heat and quench the groove to further eliminate the residual heat stress of the welding, improve the problem of the overall bending of the groove, and improve the overall flatness of the groove; another set of sliders 13 and mounting plates 14 can be symmetrically set on the gantry 12, and the corresponding welding component 2 and heating component 3 can be set on the mounting plate 14 to facilitate the simultaneous welding of another groove on the body of the clearing vehicle, improve the welding efficiency, and can be assembled according to actual needs.

[0034] Reference Figure 3-4 The welding assembly 2 includes a welding torch 21 rotatably mounted on the mounting plate 14 and a first adjusting component for adjusting the working angle of the welding torch 21. The first adjusting component includes a first adjusting rod 22 that is raised and lowered on the mounting plate 14. An adjusting cylinder 24 is fixedly connected to the end of the first adjusting rod 22 away from the mounting plate 14. An adjusting block 25 is fixedly connected to the inner wall of the adjusting cylinder 24. A clamping cylinder 23 is rotatably mounted on the end of the mounting plate 14 away from the gantry frame 12. An adjusting hole 231 that is movably adapted to the adjusting block 25 is opened on the inner peripheral wall of the clamping cylinder 23. The inner peripheral wall of the clamping cylinder 23 is movably fitted to the outer peripheral wall of the adjusting cylinder 24. A limiting block 26 is integrally formed on the first adjusting rod 22. A limiting hole 27 that is movably adapted to the limiting block 26 is opened on the mounting plate 14.

[0035] Since the welding working angle of the welding torch 21 is closely related to the thickness and material of the support plate and the chute when welding the support plate and the chute, in this application, the working angle of the welding torch 21 is the angle between the welding torch 21 and the web of the chute, denoted as α. The thickness of the chute web is H, the thermal conductivity is a, the thickness of the support plate is h, and the thermal conductivity is b. Therefore, tanα = (a h) / (b) H), when α is 45°, i.e., a h=b H. The support plate and the chute have the same thickness and material. In this application, the support plate and the chute are made of the same material. If the thickness of the chute is greater than the thickness of the support plate, the working angle of the welding torch is reduced, and the welding torch is more biased towards the chute, so that the formation between the support plate and the chute and the molten pool are more uniform, thereby enhancing the welding performance between the support plate and the chute.

[0036] When welding support plates and chutes of different materials and thicknesses, the first adjusting rod 22 is driven to rise and fall. The first adjusting rod 22 drives the adjusting cylinder 24 to rise and fall. The limiting block 26 and the limiting hole 27 improve the stability of the first adjusting rod 22 during movement. The adjusting block 25 on the adjusting cylinder 24 is movably adapted to the adjusting hole 231 on the clamping cylinder 23, and drives the clamping cylinder 23 to rotate at the end of the mounting plate 14, thereby adjusting the working angle between the welding torch 21 and the chutes web. If the thickness of the web is greater than that of the support plate when the materials are the same, the heat dissipation of the web is faster and the welding area on the web is narrower. At the same time, the first adjusting component adjusts the working angle of the welding torch to decrease, and the corresponding heating component 3 adjusts the heating area so that the heating area corresponds to the welding influence area. This effectively improves the welding of different models and specifications of car bodies and enhances the practicality of the equipment.

[0037] Reference Figure 3-6 The heating assembly 3 includes a heating plate 31 mounted on the mounting plate 14. This heating plate 31 is an electromagnetic induction heating plate 31. Two heating tubes 311 are symmetrically embedded on the heating plate 31. The heating tubes 311 can be solid copper tubes, hollow copper tubes, etc. An abutment groove 312 is formed on the heating plate 31, and a connector 313 is slidably disposed within the abutment groove 312. The connector 313 is provided with a retaining ring that abuts and matches the heating tubes 311. One end of the heating tube 311 near the side of the heating plate 31 and the connector 313 are respectively connected to an external power source. The heating tubes 311 are heated... The spacing between the heating plates 31 can be set to be smaller to improve the adjustment accuracy of the heating plates 31. A fixing rod 314 is fixedly connected between the two heating tubes 311. Both ends of the fixing rod 314 are fixedly connected to the abutment plate 315. The receiving plate 321 has a fixing hole that slides and adapts to the fixing rod 314. An elastic element 316, which is a spring, is sleeved on the fixing rod 314. The heating assembly 3 also includes a driving member for driving the heating plates 31 to move along the width direction of the machine base 1 and a second adjusting member for adjusting the movement of the adjusting joint 313.

[0038] Because the body of the recovery vehicle has high strength requirements, welding methods such as CO2 gas shielded welding and argon arc welding are mainly used during the welding process. These welding methods generate a lot of heat, resulting in high-temperature welding areas on the web and lower-temperature welding-affected areas on both sides of the weld. When welding different models and specifications of the body, the position of the joint 313 at the abutment groove 312 is adjusted by the second adjusting component, thereby changing the effective heating length of the heating tube 311. This makes the heating areas on both sides of the heating plate 31 correspond to the welding-affected areas on the web, and heats the welding-affected areas, reducing the temperature difference between the chute welding area and the welding-affected areas. This reduces the wavy deformation on the chute web and improves the flatness of the chute.

[0039] The height of the support plate is less than the height of the chute web. When the support plate is welded to the chute, there are welded and non-welded parts in the height direction of the chute web. The temperature difference between the welded and non-welded parts causes deformation of the chute web. Therefore, the non-welded parts need to be heated during the welding process. During the welding process, the welding heat is transferred from the welded side of the chute to the non-welded side of the chute. The heat transfer takes a certain amount of time, so the heating plate 31 needs to preheat the welding area relative to the welding torch 21. When welding the support plate and the chute from top to bottom, the welding position is in the middle of the heating plate 31 in the height direction, which is the initial position. When the mounting plate 14 moves the welding torch 21 and the heating plate 31 downwards, the heating plate 31 first contacts the bottom of the chute. At this time, the welding torch 21 has not yet completed welding. The mounting plate 14 continues to move the welding torch 21 downwards, and the elastic element 316 at the bottom of the heating plate 31 is compressed. When the welding torch 21 is completed, the welding torch 21 is located at the bottom of the heating plate 31. When the mounting plate 14 moves the welding torch 21 and the heating plate 31 upwards, the heating plate 31 returns to its initial position under the action of the elastic element 316, heating the welded and non-welded parts on the chute, further reducing the deformation of the chute.

[0040] Reference Figure 5 and Figure 6 The driving component includes a receiving plate 321 slidably mounted on a mounting plate 14. A sliding groove 322 is provided on the mounting plate 14. The receiving plate 321 is movably adapted to the sliding groove 322. A second power component 323 is fixedly connected to the mounting plate 14. The second power component 323 can be a cylinder, an electric telescopic rod, etc. The output end of the second power component 323 passes through the mounting plate 14 and is fixedly connected to the receiving plate 321. If the distance between the two sliding grooves on the body of the clearing vehicle is small, the second power component 323 can be replaced with a motor screw structure. The screw is rotatably mounted on the mounting plate 14, and the receiving plate 321 is threadedly connected to the screw. The output end of the motor is coaxially fixed to one end of the screw, providing sufficient movement space for the welding torch 21 and the heating plate 31. It can be adjusted according to the actual use conditions.

[0041] When welding begins, the second power unit 323 is activated and moves the receiving plate 321 on the mounting plate 14, causing the receiving plate 321 to move along the width of the machine base 1. The sliding groove 322 improves the stability of the movement of the receiving plate 321 and moves the heating plate 31 away from the welding torch 21. The first power unit 15 drives the mounting plate 14 to descend as a whole, moving the welding torch 21 and the heating plate 31 to the welding point between the support plate and the sliding groove. The second power unit 323 then moves the receiving plate 321 again, bringing the heating plate 31 closer to the welding torch 21 and adjusting the distance between the heating plate 31 and the sliding groove web so that the heating area on the heating plate 31 is directly opposite the welding influence area on the sliding groove web.

[0042] Reference Figure 3-6 The second adjusting component includes a second adjusting rod 331 that is raised and lowered on the receiving plate 321. A first rack 332 is fixedly connected to the end of the second adjusting rod 331 away from the mounting plate 14. A driving wheel 333 that meshes with the first rack 332 is rotatably mounted on the receiving plate 321. A rotating rod 334 is coaxially fixedly connected to the driving wheel 333. A driven wheel 335 is rotatably mounted on the receiving plate 321. The end of the rotating rod 334 away from the driving wheel 333 is coaxially fixedly connected to the driven wheel 335. A push rod 336 is slidably mounted on the receiving plate 321. A second rack 337 that meshes with the driven wheel 335 is fixedly connected to the end of the push rod 336 away from the heating plate 31. Sliding rods 338 are fixedly connected to both joints 313. The heating assembly 3 is rotatably equipped with connecting rods 339, and the ends of the two connecting rods 339 away from the joint 313 are rotatably mounted on the end of the push rod 336 near the heating plate 31. The heating assembly 3 also includes a synchronizing element for driving the first adjusting rod 22 and the second adjusting rod 331. The synchronizing element includes a third power element 343 mounted on the mounting plate 14. The third power element 343 can be a cylinder, an electric telescopic rod, etc. A drive plate 341 is raised and lowered on the mounting plate 14. The output end of the third power element 343 is fixedly connected to the drive plate 341. The end of the first adjusting rod 22 away from the welding gun 21 is fixedly connected to the drive plate 341. A guide groove 342 is provided on the drive plate 341. The end of the second adjusting rod 331 away from the heating plate 31 is movably adapted to the guide groove 342.

[0043] Since the heating component 3 generates a large amount of heat in the chute web through electromagnetic induction during the welding process, if a power component for adjusting the position of the joint 313, such as an electric telescopic rod or a cylinder, is directly installed on the heating plate 31, the power component may experience jamming or poor contact due to long-term use in a high-temperature environment. Therefore, in this application, a synchronization component, a first adjustment component, and a second adjustment component are used to adjust the working angle of the welding torch 21 and the position of the joint 313, which reduces the arrangement of the power source, lowers the cost, reduces the risk of equipment failure in a high-temperature environment for a long time, and improves the stability of the equipment.

[0044] The third power component 343 drives the drive plate 341 to move in the height direction, thereby driving the first adjusting rod 22 to move. The guide groove 342 on the drive plate 341 is movably adapted to the second adjusting rod 331, providing a basis for the drive component to drive the receiving plate 321 to move in the width direction of the machine platform 1. The drive plate 341 drives the second adjusting rod 331 to move up and down. The second adjusting rod 331 drives the drive wheel 333 to rotate through the first rack 332. The drive wheel 333 drives the push rod 336 to move on the receiving plate 321 through the rotating rod 334, the driven wheel 335, and the second rack 337. The push rod 336 moves the welding torch 21, and pushes the two connecting rods 339 to rotate. The sliding rod 338 pushes the joint 313 to move in the abutment groove 312 on the heating plate 31. When the working angle of the welding torch 21 is reduced by the first adjusting component, the distance that the joint 313 moves to both sides of the heating plate 31 is shortened by the second adjusting component. This changes the effective heating length on the heating tube 311, so that the heating area on the heating plate 31 corresponds to the welding influence area on the web of the sliding groove. This facilitates welding of different specifications and models of clearing vehicle bodies and effectively improves the practicality of the equipment.

[0045] In this application, the welding head 313 of the welding torch 21 is located in the extension direction of the rotation axis of the clamping cylinder 23. If the welding head 313 of the welding torch 21 is misaligned with the rotation axis of the clamping cylinder 23, and α=45° is taken as the initial angle of the working angle of the welding torch 21, the welding torch 21 is directly opposite the center position of the heating plate 31. When the first adjusting component adjusts the angle of the welding torch 21, the second adjusting component simultaneously drives the two joints 313 to move the same distance to both sides of the heating plate 31. At this time, the welding torch 21 is offset from the center position of the heating plate 31, causing the heating area on the heating plate 31 to be misaligned with the welding influence area on the slide, thus affecting the heating effect of the heating plate 31 on the slide.

[0046] The implementation principle of an automatic welding equipment for a tow truck body production line according to an embodiment of this application is as follows: When welding the support plate and the chute, the body that is spot-welded and fixed is first placed on the machine base 1, and the longitudinal beam of the body is parallel to the long side of the machine body. The second power component 323 drives the receiving plate 321 to move on the mounting plate 14, so that the heating plate 31 moves away from the welding gun 21. The first power component 15 drives the mounting plate 14 to descend, so that the welding gun 21 and the heating plate 31 are directly facing the chute web. The second power component 323 drives the heating plate 31 to move closer to the welding gun 21, so that the heating plate 31 is close to the non-welding side of the chute web. The welding gun 21 and the heating plate 31 are turned on. The second power component 323 drives the welding gun 21 to weld the support plate. At the same time, the heating plate 31 heats the web. The heating plate 31 reduces the temperature difference between the chute welding area and the welding influence area, effectively reducing the wavy deformation of the chute web and improving the flatness of the chute web.

[0047] When welding is required on the body of a clearing vehicle of different specifications and models, the third power component 343 drives the drive plate 341 to move, and the drive plate 341 drives the first adjusting rod 22 to move. The first adjusting rod 22 adjusts the working angle between the welding torch 21 and the slide through the adjusting block 25 on the adjusting cylinder 24 and the adjusting hole 231 on the clamping cylinder 23. At the same time, the drive plate 341 drives the second adjusting rod 331 to move. The second adjusting rod 331 drives the push rod 336 to move through the first rack 332, the driving wheel 333, the driven wheel 335 and the second rack 337. The push rod 336 pushes the joint 313 to move in the abutment groove 312 on the heating plate 31 through the connecting rod 339 and the sliding rod 338, thereby adjusting the effective heating area of ​​the heating tube 311 and making the effective heating area of ​​the heating plate 31 correspond to the welding influence area on the slide, thereby heating the slide, effectively reducing the deformation on the slide and improving the flatness of the slide.

[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An automatic welding equipment for a tow truck body production line, comprising a machine base (1), guide rails (11), and a gantry frame (12), characterized in that: A slider (13) is slidably mounted on the gantry frame (12). The moving direction of the slider (13) is parallel to the width direction of the machine platform (1). An mounting plate (14) is raised and lowered on the slider (13). A first power component (15) for driving the mounting plate (14) to rise and fall is provided on the slider (13). A welding assembly (2) for welding the support plate and the slide groove and a heating assembly (3) for heating the slide groove are provided on the mounting plate (14). The welding assembly (2) includes a welding torch (21) rotatably mounted on the mounting plate (14) and a first adjusting member for adjusting the working angle of the welding torch (21); The heating assembly (3) includes a heating plate (31) disposed on the mounting plate (14), two heating tubes (311) are symmetrically arranged on the heating plate (31), an abutment groove (312) is provided on the heating plate (31), and a connector (313) adapted to the abutment groove (312) is slidably disposed on the heating plate (31). The connector (313) is movably abutted against the outer peripheral wall of the heating tube (311). The end of the heating tube (311) near the side wall of the heating plate (31) and the connector (313) are respectively connected to the positive and negative poles of an external power supply. The heating assembly (3) also includes a driving member for driving the heating plate (31) to move and a second adjusting member for adjusting the distance between the two connectors (313).

2. The automatic welding equipment for a tow truck body production line according to claim 1, characterized in that: The first adjusting component includes a clamping cylinder (23) rotatably disposed on the side of the mounting plate (14) away from the gantry frame (12), the welding torch (21) is fixedly connected to the clamping cylinder (23), an adjusting cylinder (24) is raised and lowered on the mounting plate (14), an adjusting block (25) is fixedly connected to the inner peripheral wall of the adjusting cylinder (24), an adjusting hole (231) is opened on the inner peripheral wall of the clamping cylinder (23) to be inserted and adapted to the adjusting block (25), a first adjusting rod (22) is raised and lowered on the mounting plate (14), one end of the first adjusting rod (22) away from the gantry frame (12) is fixedly connected to the adjusting cylinder (24), a limiting block (26) is fixedly connected to the first adjusting rod (22), and a limiting hole (27) is opened on the mounting plate (14) to be movably adapted to the limiting block (26).

3. The automatic welding equipment for a tow truck body production line according to claim 1, characterized in that: The driving component includes a receiving plate (321) slidably disposed on the mounting plate (14), the mounting plate (14) having a sliding groove (322) provided thereon, the receiving plate (321) being movably adapted to the sliding groove (322), the moving direction of the receiving plate (321) being parallel to the width direction of the machine platform (1), the heating plate (31) being disposed on one end of the receiving plate (321) away from the gantry frame (12), and a second power component (323) for driving the receiving plate (321) to move being disposed on the mounting plate (14).

4. The automatic welding equipment for a tow truck body production line according to claim 3, characterized in that: The second adjusting component includes a second adjusting rod (331) slidably disposed on the receiving plate (321). The moving direction of the second adjusting rod (331) is parallel to the height direction of the machine platform (1). A first rack (332) is fixedly connected to one end of the second adjusting rod (331) away from the receiving plate (321). A drive wheel (333) that meshes with the first rack (332) is rotatably disposed on the receiving plate (321). A push rod (336) is slidably disposed on the receiving plate (321). The moving direction of the push rod (336) is parallel to the width direction of the machine platform (1). A second rack (337) is fixedly connected to one end of the push rod (336) away from the heating plate (31). The receiving plate (321) is rotatably provided with a driven wheel (335) that meshes with the second rack (337). The driving wheel (333) is coaxially fixed with a rotating rod (334). The end of the rotating rod (334) away from the driving wheel (333) is coaxially fixed with the driven wheel (335). The two joints (313) are each fixed with a sliding rod (338). The sliding rod (338) is slidably and rotatably provided with a connecting rod (339). The end of the connecting rod (339) away from the heating plate (31) is rotatably provided with the push rod (336). The heating assembly (3) also includes a synchronizing element that drives the first adjusting rod (22) and the second adjusting rod (331) to move.

5. The automatic welding equipment for a tow truck body production line according to claim 4, characterized in that: The synchronizing element includes a drive plate (341) slidably disposed on the mounting plate (14), a guide groove (342) is provided on the drive plate (341), one end of the first adjusting rod (22) away from the welding gun (21) is fixedly connected to the drive plate (341), and one end of the second adjusting rod (331) away from the heating plate (31) is slidably engaged in the guide groove (342). A third power element (343) is provided on the mounting plate (14), and the output end of the third power element (343) is fixedly connected to the drive plate (341).

6. The automatic welding equipment for a tow truck body production line according to claim 4, characterized in that: A fixing rod (314) is fixedly connected to the heating plate (31), and abutment plates (315) are fixedly connected to both ends of the fixing rod (314). A fixing hole that is movably adapted to the fixing plate is opened on the receiving plate (321), and an elastic element (316) is sleeved on the fixing rod (314).

7. The automatic welding equipment for a tow truck body production line according to claim 1, characterized in that: The gantry (12) is provided with a third rack (161), the slider (13) is rotatably provided with a first gear (162) that meshes with the third rack (161), and the slider (13) is provided with a fourth power component (163) that drives the first gear (162) to rotate.

8. The automatic welding equipment for a tow truck body production line according to claim 1, characterized in that: A fourth rack (171) is fixedly connected to the guide rail (11). Both ends of the gantry frame (12) are rotatably provided with a second gear (172) that meshes with the fourth rack (171). Both ends of the gantry frame (12) are provided with a fifth power component (173) that drives the second gear (172) to rotate.

Images