Automatic welding device for steel wheels

Abstract

The present invention relates to the technical field of steel wheel manufacturing and welding, and more specifically, to an automatic welding device for steel wheels, comprising a central control base, a lifting drive platform, a driving slide, and a servo motor, etc. The central control base is the main supporting structure of the device; the lifting drive platform is arranged in the middle of the upper part of the central control base, and the upper surface of the electric control matching platform of the lifting drive platform is concave and adapted to the outer contour of the wheel hub; the driving slide is symmetrically arranged on both sides of the upper part of the central control base; and the servo motor is fixed on the sliding seat of the driving slide. The present invention drives the clamping cover to clamp the wheel hub by a servo motor, and dynamically corrects the welding trajectory in combination with a positioning adjustment component, thereby solving the deviation problem caused by traditional manual positioning, significantly improving the stability of the welding path, reducing defects such as incomplete welding and slag inclusion, and adapting to the welding requirements of wheel hubs of different sizes, thereby improving the versatility of the equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of steel wheel manufacturing and welding, and in particular to an automatic welding device for steel wheels. Background Art

[0002] Steel wheels are core load-bearing components for commercial and heavy-duty vehicles, and their structural strength and reliability directly impact driving safety. Steel wheel welding is a critical process that connects the hub and subplate using molten metal to form a single unit. The goal of welding is to ensure sufficient mechanical properties and sealing between components to meet the wheel's load-bearing, fatigue-resistance, and corrosion-resistance requirements.

[0003] However, existing welding techniques for the wheel hub and subplate present significant inconveniences: conventional welding equipment often relies on manual positioning and clamping, resulting in large deviations in workpiece installation, unstable welding paths, and the tendency to produce defects such as incomplete penetration and slag inclusions. Furthermore, the asymmetric structure and complex curved contact surface between the wheel hub and subplate increase the difficulty of controlling the welding torch trajectory, causing uneven welding heat input and further exacerbating the risk of deformation. These issues not only reduce welding quality but can also cause stress concentration during operation, leading to cracks or even breakage in the wheel, threatening vehicle safety. Furthermore, low welding efficiency and a high reliance on manual operation make it difficult to adapt to the automated, large-scale production requirements of modern automobile manufacturing.

[0004] Therefore, it is urgent to develop a kind of steel wheel automatic welding device to solve the above-mentioned technical problems. Summary of the Invention

[0005] In order to overcome the shortcomings of existing welding equipment that mostly relies on manual positioning and clamping, resulting in large workpiece installation deviation, unstable welding path, easy to produce incomplete welding, and the asymmetric structure and complex curved contact surface between the hub and the sub-plate increase the difficulty of controlling the welding gun trajectory, resulting in uneven welding heat input, and further aggravating the risk of deformation, the present invention provides an automatic welding device for steel wheels.

[0006] The technical solutions of the present invention are as follows:

[0007] An automatic welding device for steel wheels, comprising:

[0008] The central control base is the supporting structure of the device body;

[0009] The lifting drive platform is arranged in the middle of the upper part of the central control base. The upper surface of the electric control platform of the lifting drive platform is concave and adapted to the outer contour of the wheel hub;

[0010] The driving slide is symmetrically arranged on both sides of the upper part of the central control base;

[0011] A servo motor is fixed on a slide seat of the driving slide;

[0012] There are two pressing covers, which are connected to the output terminals of the servo motors on both sides. The pressing covers are in contact with the outer surface of the wheel hub. The two pressing covers are symmetrically distributed on both sides of the lifting drive platform.

[0013] A mounting bracket connected to the side of the compression cover;

[0014] An electric welding head is slidably connected to the side of the mounting frame;

[0015] There are multiple adjusting rods, which are circumferentially penetrated and slidably connected to the inner side of the compression cover;

[0016] A positioning wheel is provided at one end of each adjusting rod penetrating the pressing cover, and the positioning wheel is in contact with the surface of the wheel sub-plate;

[0017] The positioning adjustment components are arranged at the positions where the pressing covers on both sides are away from the lifting drive platform, and are linked with the adjustment rod and the mounting frame.

[0018] Furthermore, the lifting drive platform is composed of a linear drive module and an electric control matching table. The linear drive module drives the electric control matching table to move up and down. A loading cavity is opened in the lower part of the electric control matching table, and guide slots are opened on both sides of the upper part.

[0019] Furthermore, it also includes a bidirectional drive and a fastening frame. The bidirectional drive is installed in the loading cavity of the lifting drive platform, and a fastening frame is provided on the upper part of the driving part of the bidirectional drive. The two fastening frames slide in the guide grooves of the electric control matching platform respectively, and cooperate with the clamping cover to clamp the wheel hub.

[0020] Furthermore, the positioning adjustment assembly includes a threaded sleeve, a driving motor, a driving gear, a driven gear, a movable plate and a linkage rod. The servo motor output shaft is externally rotatably connected to the threaded sleeve, one end of the threaded sleeve is rotatably connected to the end face of the clamping cover, and the side of the clamping cover away from the welding head is equipped with a driving motor. The output end of the driving motor is connected to the driving gear, the driving gear is rotatably connected to the end face of the clamping cover, the middle part of the clamping cover is rotatably connected to the driven gear, the driven gear is rotatably engaged with the adjacent driving gear, and the inner side of the driven gear is fixedly connected to the end of the threaded sleeve, the external thread of the threaded sleeve is connected to the movable plate, and the external part of the movable plate is symmetrically rotatably connected to a plurality of linkage rods corresponding to the number of adjustment rods, and the end of the linkage rod is rotatably connected to the corresponding end of the adjustment rod.

[0021] Furthermore, the positioning and adjustment assembly also includes a connecting frame and a matching rod. A connecting frame is provided on the side of the movable plate close to the mounting frame. The side of the connecting frame is rotatably and slidably connected to the matching rod. The middle part of the matching rod is rotatably connected to the mounting frame, and the other end of the matching rod is rotatably and slidably connected to the outside of the welding head.

[0022] Furthermore, it also includes an alignment plate and a buffer plate. The middle parts of the opposite surfaces of the two pressing covers are connected to the alignment plates that contact the hub sub-plate, and the middle parts of the opposite surfaces of the two alignment plates are slidably connected to the buffer plates.

[0023] Furthermore, a return spring is included, and a return spring is provided at the sliding connection between the buffer plate and the alignment plate.

[0024] Furthermore, it also includes a fixing seat and a dust blower. The fixing seat is set on the side of the compression cover, and the dust blower is embedded in the fixing seat. The air outlet end of the dust blower is tilted toward the lifting drive platform to cover the welding path area of ​​the electric welding head.

[0025] Compared with the existing technology, the present invention has the following advantages: 1. The present invention drives the clamping cover to clamp the wheel hub through a servo motor, and combines the positioning adjustment component to dynamically correct the welding trajectory, thereby solving the deviation problem caused by traditional manual positioning, significantly improving the stability of the welding path, reducing defects such as incomplete welding and slag inclusion, and adapting to the welding requirements of wheels of different sizes, thereby improving the versatility of the equipment.

[0026] 2. The present invention realizes the vertical movement of the lifting drive platform through a linear drive module. The loading cavity provides installation space for the bidirectional drive and the fastening frame. The guide groove ensures the smooth sliding of the fastening frame, enhances the control accuracy of the clamping force, avoids the displacement of the wheel hub during the welding process, and improves the consistency of welding quality.

[0027] 3. The present invention uses a bidirectional drive to slide along the guide groove through the fastening frame to form a linkage clamping with the clamping cover, further enhancing the clamping force, preventing the wheel hub from loosening due to thermal deformation or vibration during welding of complex curved surfaces, and ensuring welding stability.

[0028] 4. The present invention realizes precise circumferential adjustment of the positioning wheel through the driving gear, driven gear and threaded sleeve transmission system, and dynamically corrects the welding trajectory, especially for the asymmetric structure and complex curved contact surface between the hub and the sub-plate, effectively solving the problems of difficult welding gun trajectory control and uneven heat input, and reducing the risk of welding deformation.

[0029] 5. The present invention uses a positioning adjustment component to drive the dynamic adjustment mechanism of the positioning wheel to automatically switch the welding path radius according to the hub size. When welding a small-sized hub, the positioning wheel contracts inward to shorten the arc path, and when welding a large-sized hub, it expands outward to adapt to the curvature change, significantly improving the versatility and production flexibility of the equipment.

[0030] 6. The present invention adopts the flexible linkage design of the connecting frame and the matching rod, so that the angle of the mounting frame can be adjusted synchronously with the displacement of the movable plate. The electric welding head can slide horizontally along the welding path, ensuring that the welding gun always fits the complex curved contact area between the wheel hub and the sub-plate, thereby improving the welding coverage and sealing.

[0031] 7. The present invention absorbs slight deviations during the clamping process through the buffer plate under the action of the reset spring, avoiding local stress concentration caused by rigid clamping, and at the same time adapting to the welding requirements of sub-plates of different thicknesses, reducing workpiece damage and extending the service life of the equipment.

[0032] 8. The present invention uses a dust blower to remove welding spatter and waste residue in real time, preventing pollutants from adhering to the hub surface, reducing subsequent processing steps, and at the same time avoiding spatter from interfering with the welding gun path, thereby improving the weld surface quality and equipment operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the assembly structure of the present invention.

[0034] Figure 2 It is a three-dimensional structural diagram of the central control base, lifting drive platform, drive slide and other components of the present invention.

[0035] Figure 3 This is a three-dimensional structural diagram of components such as the drive slide, servo motor and pressing cover of the present invention.

[0036] Figure 4 It is a schematic cross-sectional view of the lifting drive platform, bidirectional drive and fastening frame of the present invention.

[0037] Figure 5 It is a three-dimensional structural diagram of the servo motor, mounting bracket, adjustment rod and other components of the present invention.

[0038] Figure 6 It is a schematic diagram of the three-dimensional structure of the threaded sleeve, movable plate, linkage rod and other components of the present invention.

[0039] Figure 7 It is a three-dimensional structural diagram of components such as the driving motor, driving gear and driven gear of the present invention.

[0040] Figure 8 It is a three-dimensional structural diagram of components such as the maneuvering rod, the moving plate and the linkage rod of the present invention.

[0041] Figure 9 It is a three-dimensional structural diagram of components such as the movable plate, connecting frame and matching rod of the present invention.

[0042] Figure 10 It is a schematic diagram of the three-dimensional structure of the mounting frame, connecting frame, matching rod and other components of the present invention.

[0043] Figure 11 It is a schematic cross-sectional view of components such as a pressing cover, an alignment plate and a buffer plate of the present invention.

[0044] Figure 12 It is a schematic diagram of the three-dimensional structure of the components such as the pressing cover, the fixing base and the dust blower of the present invention.

[0045] Explanation of the accompanying drawings: 1. Central control base, 2. Lifting drive platform, 21. Bidirectional drive, 22. Fastening frame, 3. Driving slide, 4. Servo motor, 41. Pressing cover, 5. Mounting frame, 51. Welding head, 6. Adjusting rod, 61. Positioning wheel, 7. Threaded sleeve, 71. Driving motor, 72. Driving gear, 73. Driven gear, 74. Moving plate, 75. Linkage rod, 8. Connecting frame, 81. Cooperating rod, 9. Alignment plate, 91. Buffer plate, 92. Reset spring, 10. Fixed seat, 11. Dust blower. DETAILED DESCRIPTION

[0046] Embodiment: An automatic welding device for steel wheels, such as Figures 1-12 Shown, including:

[0047] The central control base 1 serves as the main support structure of the device. The right front part is equipped with a control system that controls the operation of various electrical components in the device.

[0048] The lifting drive platform 2 is bolted to the middle of the upper part of the central control base 1. The upper surface of the electric control matching platform of the lifting drive platform 2 is concave and adapted to the outer contour of the wheel hub, providing a stable load-bearing platform. The lifting drive platform 2 consists of a linear drive module and an electric control matching table. The linear drive module drives the electric control matching table to move up and down, lifting the wheel assembly to the specified welding height. A loading cavity is opened in the lower part of the electric control matching table, and guide slots are opened on both sides of the upper part.

[0049] The driving slide 3 is symmetrically arranged on the left and right sides of the upper part of the central control base 1 by bolts, providing a mounting base for subsequent components;

[0050] The servo motor 4 is fixed on the sliding seat of the driving slide 3;

[0051] There are two clamping covers 41, which are connected to the output ends of the servo motors 4 on both sides. The clamping covers 41 are in contact with the outer surface of the wheel hub. The two clamping covers 41 are symmetrically distributed on the left and right sides of the lifting drive platform 2 to clamp the wheel hub;

[0052] The mounting frame 5 is connected to the rear side of the compression cover 41 by bolts;

[0053] The welding head 51 is slidably connected to the outward side of the mounting frame 5;

[0054] There are four adjustment rods 6, which form a group of four. The four adjustment rods 6 in a group are circumferentially penetrated and slidably connected to the inner side of the corresponding pressing cover 41;

[0055] A positioning wheel 61 is provided at one end of each adjusting rod 6 that passes through the pressing cover 41, and the positioning wheel 61 contacts the surface of the wheel sub-plate to assist in positioning and supporting;

[0056] The positioning adjustment components are arranged at the positions of the left and right pressing covers 41 away from the lifting drive platform 2, and cooperate with the adjustment rod 6 and the mounting frame 5 to realize dynamic adjustment of the welding position.

[0057] like Figure 1 and Figure 4 As shown, it also includes a bidirectional driver 21 and a fastening frame 22. The bidirectional driver 21 is installed in the loading cavity of the lifting drive platform 2. The bidirectional driver 21 is a bidirectional screw driver. A fastening frame 22 is provided on the upper part of the driving member of the bidirectional driver 21. The two fastening frames 22 slide in the guide grooves of the electric control matching platform respectively, and cooperate with the clamping cover 41 to clamp the wheel hub. The fastening frame 22 is driven by the bidirectional screw to slide along the guide groove, thereby enhancing the clamping force of the clamping cover 41 on the wheel hub and preventing the wheel hub from loosening during welding.

[0058] like Figure 5-Figure 9 As shown, the positioning adjustment assembly includes a threaded sleeve 7, a driving motor 71, a driving gear 72, a driven gear 73, a movable plate 74 and a linkage rod 75. The output shaft of the servo motor 4 is externally connected to the threaded sleeve 7, and one end of the threaded sleeve 7 is connected to the end face of the pressing cover 41 for rotation. The front side of the pressing cover 41 away from the welding head 51 is equipped with a driving motor 71. The output end of the driving motor 71 is connected to the driving gear 72 through a bearing. The driving gear 72 is connected to the end face of the pressing cover 41 for rotation. The middle part of the pressing cover 41 is connected to the driven gear 72 through a bearing. The driving gear 73 and the driven gear 73 are rotationally engaged with the adjacent driving gear 72, and the inner side of the driven gear 73 is fixedly connected to the end of the threaded sleeve 7. The external thread of the threaded sleeve 7 is connected with a movable plate 74. The external part of the movable plate 74 is symmetrically connected to four linkage rods 75 corresponding to the number of the adjustment rods 6. The end of the linkage rod 75 is rotationally connected to the corresponding end of the adjustment rod 6 through a rotary joint. The position of the positioning wheel 61 is dynamically adjusted by the drive motor 71, the driving gear 72, the driven gear 73 transmission system and the linkage rod 75 to correct the welding trajectory.

[0059] like Figure 9 and Figure 10 As shown, the positioning adjustment assembly also includes a connecting frame 8 and a matching rod 81. The connecting frame 8 is provided on the side of the movable plate 74 close to the mounting frame 5. The side of the connecting frame 8 is rotatably and slidably connected to the matching rod 81. The middle part of the matching rod 81 is rotatably connected to the mounting frame 5, and the other end of the matching rod 81 is rotatably and slidably connected to the outside of the welding head 51. The mounting frame 5 and the welding head 51 are linked by the connecting frame 8 and the matching rod 81 to meet the welding requirements of wheels of different sizes.

[0060] like Figure 11As shown, it also includes an alignment plate 9 and a buffer plate 91. The middle parts of the opposite surfaces of the two clamping covers 41 are bolted or welded with an alignment plate 9 that contacts the hub sub-plate. The middle parts of the opposite surfaces of the two alignment plates 9 are slidingly connected with a buffer plate 91. The buffer plate 91 absorbs the impact energy during the clamping process, adapts to the welding requirements of sub-plates of different thicknesses, and reduces damage to the workpiece.

[0061] like Figure 11 As shown, a return spring 92 is also included. A return spring 92 is provided at the sliding connection between the buffer plate 91 and the alignment plate 9. The return spring 92 provides a return force for the buffer plate 91, maintains stable contact between the clamping cover 41 and the wheel hub, absorbs welding vibration or thermal deformation energy, and avoids dynamic disturbances that lead to a decrease in welding quality.

[0062] like Figure 1 and Figure 12 As shown, it also includes a fixing seat 10 and a dust blower 11. The fixing seat 10 is set on the side of the compression cover 41 by bolts. The dust blower 11 is embedded in the fixing seat 10. The dust blower 11 is connected to the external air source through an air pipe. The dust blower 11 removes welding spatter and waste slag through high-speed airflow to prevent pollutants from adhering to the surface of the hub. The air outlet end of the dust blower 11 is tilted toward the lifting drive platform 2, covering the welding path area of ​​the electric welding head 51.

[0063] During operation, the central control base 1 serves as the device's basic support structure, with the lift drive platform 2 located in the center of its upper portion initially in a low position. The upper surface of the electronically controlled mating platform of the lift drive platform 2 features a concave surface adapted to the outer contour of the wheel hub, supporting the wheel assembly to be welded. The output of the servo motor 4 is connected to the clamping cover 41, which is now in a non-clamped position, leaving ample space for loading the wheel hub. The operator places the wheel hub and subplate assembly into the concave surface of the lift drive platform 2, aligning the outer surface of the wheel hub with the pre-set contact area of ​​the clamping cover 41 and leaving space between the subplate surface and the positioning wheel 61. The linear drive module within the lift drive platform 2 is activated, driving the electronically controlled mating platform to rise vertically, lifting the wheel hub to the desired height. During this process, the loading cavity and guide slots in the lower portion of the electronically controlled mating platform provide space for subsequent tightening operations. The drive slides 3 on both sides are activated synchronously, driving the servo motor 4 and the clamping cover 41 toward the lift drive platform 2. The inner side of the compression cover 41 fits tightly against the outer surface of the wheel hub, forming a preliminary clamp. The bidirectional actuator 21 within the loading cavity is activated, and its driving element drives the clamping frame 22 to slide along the guide slot. The clamping frame 22 and the compression cover 41 form a linkage, further enhancing the clamping force and ensuring that the wheel hub does not move during the welding process.

[0064] The alignment plate 9 on the opposite side of the pressing cover 41 contacts the hub sub-plate, and the buffer plate 91 slides automatically under the action of the return spring 92 to absorb slight deviations during the clamping process and avoid local stress concentration caused by rigid clamping.

[0065] The drive motor 71 of the positioning and adjustment assembly is started, driving the driving gear 72 to engage with the driven gear 73. The driving gear 72 transmits power to the threaded sleeve 7 through the driven gear 73. The rotation of the threaded sleeve 7 drives the movable plate 74 to move axially. The movable plate 74 is connected to multiple adjustment rods 6 through a linkage rod 75. The end of the linkage rod 75 pushes the adjustment rod 6 to slide circumferentially along the inner side of the clamping cover 41. The positioning wheel 61 at the end of the adjustment rod 6 adjusts its position accordingly, forming a new contact point with the surface of the hub sub-plate, dynamically correcting the welding trajectory and balancing the contact force to prevent the sub-plates in the hub and sub-plate assembly from slightly deflecting due to the influence of force during welding.

[0066] Furthermore, the mechanism for adapting to different wheel sizes operates differently. For small wheels, the positioning wheel 61 contracts inward, reducing the contact radius with the subplate, allowing the welding head 51 to move along a tighter arc path and ensuring complete weld coverage. For large wheels, the positioning wheel 61 expands outward, increasing the contact radius with the subplate and guiding the welding head 51 along a wider arc path to accommodate the curvature of the wheel. The connecting frame 8 is linked to the mounting frame 5 and the welding head 51 via the mating rod 81.

[0067] The welding head 51 moves along a preset welding path within the sliding range of the mounting frame 5. Its movement is controlled jointly by the servo motor 4 and the positioning adjustment assembly. The servo motor 4 drives the clamping cover 41 to rotate, thereby driving the welding head 51 to rotate and weld around the edge of the hub and the sub-plate. During the welding process, the welding head 51 adjusts the welding current, voltage and speed to adapt to the heat input requirements of different welding positions. The positioning wheel 61 at the end of the adjustment rod 6 continuously contacts the surface of the hub sub-plate and feeds back position information to the control system in real time. The positioning wheel 61 reduces the clamping resistance through rolling friction and provides a physical positioning reference for the welding head 51 to prevent welding deviation. The reset spring 92 absorbs impact energy during welding vibration or thermal deformation, maintains stable contact between the clamping cover 41 and the hub, and avoids a decrease in welding quality due to dynamic disturbances.

[0068] After welding is completed, the dust blower 11 in the fixing seat 10 is started, and the air outlet is tilted toward the lifting drive platform 2, covering the welding path area of ​​the electric welding head 51. The high-speed airflow removes welding spatter and waste residue to prevent pollutants from adhering to the surface of the wheel hub. After completion, the servo motor 4 reverse drives the clamping cover 41 to loosen, and the bidirectional drive 21 retracts the fastening frame 22. The lifting drive platform 2 descends to the initial position, and the operator removes the welded wheel assembly. The control system in the central control base 1 automatically detects the reset status of each component, the positioning and adjustment component returns to the initial position, the dust blower 11 is turned off, and the device enters the preparation stage for the next cycle.

Claims

1. An automatic welding device for steel wheels, comprising: A central control base (1) serving as a supporting structure for the main body of the device; A lifting drive platform (2) is arranged in the middle of the upper part of the central control base (1); the upper surface of the electric control matching platform of the lifting drive platform (2) is in a concave shape adapted to the outer contour of the wheel hub; A driving slide (3) is symmetrically arranged on both sides of the upper portion of the central control base (1); A servo motor (4) is fixed on a sliding seat of the driving slide (3); There are two pressing covers (41), which are respectively connected to the output ends of the servo motors (4) on both sides. The pressing covers (41) are in contact with the outer surface of the wheel hub. The two pressing covers (41) are symmetrically distributed on both sides of the lifting drive platform (2); A mounting frame (5) connected to the side of the compression cover (41); An electric welding head (51) is slidably connected to the side of the mounting frame (5); There are multiple adjustment rods (6), and the multiple adjustment rods (6) are slidably connected to the inner side of the pressing cover (41) along the circumferential direction; A positioning wheel (61) is provided at one end of each adjusting rod (6) penetrating the pressing cover (41), and the positioning wheel (61) contacts the surface of the wheel sub-plate; Positioning adjustment components are provided at positions where the pressing covers (41) on both sides are away from the lifting drive platform (2), and are linked with the adjustment rod (6) and the mounting frame (5); The positioning adjustment component includes a threaded sleeve (7), a driving motor (71), a driving gear (72), a driven gear (73), a movable plate (74) and a linkage rod (75). The output shaft of the servo motor (4) is externally connected to the threaded sleeve (7). One end of the threaded sleeve (7) is rotatably connected to the end face of the pressing cover (41). The side of the pressing cover (41) away from the welding head (51) is equipped with a driving motor (71). The output end of the driving motor (71) is connected to the driving gear (72). The driving gear (72) is connected to the pressing cover (41). The end face of the tightening cover (41) is rotatably connected, and the middle part of the tightening cover (41) is rotatably connected to a driven gear (73), the driven gear (73) is rotatably engaged with the adjacent driving gear (72), and the inner side of the driven gear (73) is fixedly connected to the end of the threaded sleeve (7), the outer thread of the threaded sleeve (7) is connected to a movable plate (74), and the outer part of the movable plate (74) is symmetrically rotatably connected to a plurality of linkage rods (75) corresponding to the number of the adjustment rods (6), and the ends of the linkage rods (75) are rotatably connected to the ends of the corresponding adjustment rods (6); The positioning adjustment assembly further includes a connecting frame (8) and a matching rod (81). The connecting frame (8) is provided on one side of the movable plate (74) close to the mounting frame (5). The side of the connecting frame (8) is rotatably and slidably connected to the matching rod (81). The middle portion of the matching rod (81) is rotatably connected to the mounting frame (5), and the other end portion of the matching rod (81) is rotatably and slidably connected to the outside of the electric welding head (51).

2. The automatic welding device for steel wheels according to claim 1, characterized in that: The lifting drive platform (2) is composed of a linear drive module and an electric control matching table. The linear drive module drives the electric control matching table to move up and down. A loading cavity is provided in the lower part of the electric control matching table, and guide slots are provided on both sides of the upper part.

3. The automatic welding device for steel wheels according to claim 2, characterized in that: It also includes a bidirectional driver (21) and a fastening frame (22). The bidirectional driver (21) is installed in the loading cavity of the lifting drive platform (2). The fastening frame (22) is provided on the upper part of the driving member of the bidirectional driver (21). The two fastening frames (22) slide in the guide grooves of the electric control matching platform respectively and cooperate with the clamping cover (41) to clamp the wheel hub.

4. The automatic welding device for steel wheels according to claim 3, characterized in that: It also includes an alignment plate (9) and a buffer plate (91), wherein the middle portions of the opposing surfaces of the two pressing covers (41) are connected to the alignment plate (9) in contact with the hub sub-plate, and the middle portions of the opposing surfaces of the two alignment plates (9) are slidably connected to the buffer plate (91).

5. The automatic welding device for steel wheels according to claim 4, characterized in that: A return spring (92) is also included, and a return spring (92) is provided at the sliding connection between the buffer plate (91) and the alignment plate (9).

6. The automatic welding device for steel wheels according to claim 5, characterized in that: It also includes a fixing seat (10) and a dust blower (11), wherein the fixing seat (10) is provided on the side of the pressing cover (41), the dust blower (11) is embedded in the fixing seat (10), and the air outlet end of the dust blower (11) is tilted toward the lifting drive platform (2), covering the welding path area of ​​the electric welding head (51).

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