Automobile wheel cover welding fixture

Abstract

This invention relates to the field of welding positioning technology, and in particular to a welding fixture for automotive wheel covers. The technical solution comprises: a mounting frame; at least three sets of limiting rods fixedly connected to the mounting frame; several adjusting arms slidably connected to the arc surface of the mounting frame; arm heads fixedly connected to the ends of each adjusting arm; a material support surface fixedly connected between each arm head; the material support surface being made of an elastic deformable material; several fan-shaped frames slidably disposed on the arc surface of the mounting frame; and an elastic surface fixedly connected to the contact portion between the fan-shaped frames and the material support surface. This invention changes the radius of the material support surface by radially moving the adjusting arms, and adapts the shape to the pneumatic elastic surface, quickly adapting to wheel covers with different curvature dimensions. It eliminates the need to change to a dedicated fixture, significantly reducing changeover costs and shortening the changeover cycle, thus meeting the needs of multi-variety co-production.

Description

Technical Field

[0001] This invention relates to the field of welding positioning technology, and in particular to a welding fixture for automobile wheel covers. Background Technology

[0002] The wheel arch is an important thin-plate body panel for automobiles. During its manufacturing process, sound-absorbing materials and other auxiliary components are often welded to the inside of the wheel arch to optimize performance and structural strength. To ensure welding quality, the wheel arch and auxiliary components must maintain a precise relative position during welding to achieve sufficient welding accuracy.

[0003] Currently, the industry generally uses standard arc support fixtures as the core positioning element of wheel cover welding fixtures. Through contour design, the arc support surface that fits the wheel cover is used to achieve rapid clamping and coarse positioning, enabling stable production of wheel covers. However, the inherent drawbacks of this welding fixture are also obvious: the outline dimensions of the arc support fixture are customized according to the curvature radius, chord length and cross-sectional shape of a specific wheel cover, and it does not have the ability to adjust the size. Therefore, when the production task is switched to a different size wheel cover, the existing fixture cannot be adjusted to adapt to the new size, and it often has to be remade, resulting in high fixture investment costs and long changeover cycles. Summary of the Invention

[0004] To address the shortcomings of the prior art, this invention provides a welding fixture for automotive wheel covers that can be adapted to various wheel cover specifications and balances positioning accuracy with adjustment flexibility.

[0005] The technical implementation of the present invention is as follows: a welding fixture for automobile wheel cover, comprising: a mounting frame, the upper part of which is provided with a frame structure with a positive cross section in the shape of a positive semi-circular arc; At least three sets of limiting rods are fixedly connected to the mounting frame and are equidistantly arranged along the arc surface of the mounting frame; Several adjusting arms are slidably connected to the arc surface of the mounting frame. Each adjusting arm is set with a corresponding limit rod group and forms a sliding fit with each other. Arm heads are fixedly connected to the ends of each adjusting arm; A material support surface is fixedly connected between each arm head, and the material support surface is supported by the arm head and forms a positive semi-circular arc shape; the material support surface is made of an elastic deformable material; An air pump that is fixedly connected to the middle of the mounting bracket; Several sector frames are slidably installed on the arc surface of the mounting frame, and their cross-section is fan-shaped; each sector frame is arranged between adjacent adjusting arms to support the material support surface between the adjusting arms. An elastic surface is fixedly connected to the contact part between the fan-shaped frame and the material support surface; the elastic surface and the fan-shaped frame form a sealed space that can expand when the fan-shaped frame is inflated; the two sides of the elastic surface are fixedly connected to the adjacent arm head respectively. And connecting pipes that are fixedly connected between each sector frame and the air pump.

[0006] More preferably, the clamp further includes: brackets slidably connected to the left and right sides of the lower part of the mounting frame, the two brackets being fixedly connected to the left and right adjusting arms located at the lowest position respectively; the two ends of the material support surface extend outward to form extension sections, and are fixedly connected to the bottom of the two brackets respectively.

[0007] More preferably, the clamp further includes a first motor fixedly connected to the lower part of the mounting frame; The first gear is rotatably connected to the lower part of the mounting bracket, and the first gear is coaxially and fixedly connected to the output shaft of the first motor. Rotate the gear ring connected to the mounting bracket, and the gear ring meshes with the first gear; the center of the gear ring coincides with the center of the semi-circular arc frame of the mounting bracket; Several connecting plates are fixedly connected to the arc surface of the mounting frame, and each connecting plate is set to correspond to each adjusting arm; A rack fixedly connected to each adjusting arm; And several second gears rotatably connected to each connecting plate. The second gears on the same connecting plate are coaxially fixedly connected and divided into two groups according to the connecting object. One group meshes with the gear ring, and the other group meshes with the rack on the adjusting arm.

[0008] More preferably, the connecting pipe consists of a rigid section and a telescopic section; the rigid section is located at one end of the connecting pipe near the fan-shaped frame, and the rigid section forms a sliding fit with the arc surface of the mounting bracket; the telescopic section is connected to the air pump side.

[0009] More preferably, the clamp further includes a support plate fixedly connected to the rear side of the mounting bracket; A movable seat that is slidably connected to the support plate; The first electric push rod is fixedly connected to each movable seat; A support fixedly connected to the end of the first electric push rod; Rotate the clamping arm connected to the support; An elastic band is fixedly connected to the clamping arm, and the clamping arm contacts the wheel cover through the elastic band; And a second motor fixedly connected to the support, the output shaft of the second motor being coaxially and fixedly connected to the rotation shaft of the clamping arm.

[0010] More preferably, each movable seat is fixedly connected to its corresponding adjusting arm, so that when the adjusting arm moves radially, the movable seat follows synchronously.

[0011] More preferably, the mounting bracket has a base plate at the bottom; The clamp further includes a support block that is slidably connected to the base plate and located on the side of the mounting frame; A second electric push rod is fixedly connected to the support block; and a support fixedly connected to the end of the second electric push rod; The mounting frame is equipped with the aforementioned material removal structure, consisting of a support block, a second electric push rod, and a support base, on both the left and right sides.

[0012] More preferably, the support block is fixedly connected to the bracket, while the suspension is slidably engaged with the bracket.

[0013] More preferably, the fixture further includes: a base disposed in the welding operation area, and a mounting bracket slidably connected to the base; A slide rod is fixedly connected to one side of the base, and the slide rod forms a sliding fit with the corresponding side of the mounting bracket; Rotate the lead screw connected to the other side of the base, and the lead screw forms a threaded engagement with the corresponding side of the mounting bracket; And a third motor fixedly connected to the base, the output shaft of the third motor being fixedly connected to the lead screw on the same axis.

[0014] The beneficial effects of this invention are as follows: This invention changes the radius of the material support surface by adjusting the radial movement of the adjusting arm, and adapts the shape by cooperating with the pneumatic elastic surface, quickly adapting to wheel covers with different curvature sizes, without the need to change special fixtures, significantly reducing changeover costs and shortening the changeover cycle, and meeting the needs of multi-variety co-production; at the same time, the air-inflated tensioning method can provide uniform and controllable clamping force, avoiding deformation caused by excessive contact during positioning, and effectively ensuring positional accuracy and welding quality during the welding process.

[0015] The drive structure for the adjusting arms of this invention can ensure that the displacement of each arm is consistent during the adjustment process, and the material support surface can maintain a standard positive semi-circular arc shape before and after adjustment. There is no need to perform individual fine adjustment on each adjusting arm, making the operation convenient and the accuracy reliable.

[0016] The present invention further adds a clamping arm to reliably clamp and fix the wheel cover, further preventing micro-displacement during processing and improving fixing accuracy; therefore, the present invention can reliably fix and safely protect wheel covers of different sizes, and its opening and closing avoidance function also facilitates loading and welding operations, further improving the practicality and work efficiency of the fixture.

[0017] This invention uses a material removal structure to automate the unloading of the wheel cover, further improving operational convenience. At the same time, its adaptive position adjustment capability further enhances the overall flexible adjustment function of this invention.

[0018] This invention enables automatic material loading and unloading in the welding work area, which not only improves the safety and convenience of loading and unloading, but also facilitates integration with the workstation flow in automated welding production lines, further enhancing the production line adaptability of this invention. Attached Figure Description

[0019] Figure 1This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is a schematic diagram showing the positional structure of the adjusting arm, the material support surface, and the fan-shaped frame in this invention.

[0021] Figure 3 This is a separate diagram of the connection structure between the adjusting arm, the material support surface, and the fan-shaped frame in this invention.

[0022] Figure 4 This is a schematic diagram showing the state of the material support surface when the adjusting arm extends in this invention.

[0023] Figure 5 This is a schematic diagram of the connection structure between the clamping arm and the adjusting arm in this invention.

[0024] Figure 6 This is a schematic diagram of the connection structure between the support plate and the movable seat in this invention.

[0025] Figure 7 This is a schematic diagram showing the positional structure of the two sets of material removal structures in this invention.

[0026] Figure 8 This is a schematic diagram of the connection structure between the support plate and the bracket and the support frame in this invention.

[0027] Figure 9 This is a schematic diagram of the connection structure between the lead screw and the slide bar in this invention.

[0028] The above-mentioned figures include the following reference numerals: 101: mounting bracket, 1011: base plate, 102: limiting rod, 103: adjusting arm, 1031: first motor, 1032: first gear, 1033: gear ring, 1034: connecting plate, 1035: second gear, 1036: rack, 104: arm head, 105: material support surface, 106: bracket, 201: air pump, 202: fan-shaped frame, 203: elastic surface, 204: Connecting pipe, 2041: rigid section, 2042: telescopic section, 301: support plate, 3011: slide groove, 3012: guide rod, 302: movable seat, 303: first electric push rod, 304: support, 305: clamping arm, 306: elastic band, 307: second motor, 401: support block, 402: second electric push rod, 403: support seat, 501: base, 502: slide rod, 503: lead screw, 504: third motor. Detailed Implementation

[0029] The invention will now be described more fully below with reference to the accompanying drawings, in which presently preferred embodiments of the invention are illustrated. However, the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness and to fully convey the scope of the invention to those skilled in the art.

[0030] Example: A welding fixture for automobile wheel covers, such as Figures 1-4 As shown, it includes: a mounting frame 101, the upper part of which has a frame structure with a positive cross-section of a positive semi-circular arc; limiting rods 102 fixedly installed on the mounting frame 101, the limiting rods 102 are configured in groups with a total of no less than three groups, each group containing no less than two parallel limiting rods 102, the limiting rods 102 in the same group are arranged at equal intervals along the front and rear thickness direction, and the limiting rods 102 in each group are arranged at equal intervals along the arc surface of the mounting frame 101; and several adjusting arms 103 slidably installed on the arc surface of the mounting frame 101, the number of which corresponds one-to-one with the groups of limiting rods 102, and each adjusting arm 103 is connected to its corresponding limiting rod. The rod 102 forms a sliding fit. Under the driving action, the adjusting arm 103 is guided and constrained by the limiting rod 102, enabling stable and synchronous radial sliding along the arc surface of the mounting frame 101. Arm heads 104 are fixedly installed at the ends of each adjusting arm 103. The arm heads 104 are cylindrical and arranged along the front-to-back width direction. A material support surface 105 is fixedly installed between each arm head 104. The material support surface 105 is supported by the arm heads 104 and forms a positive semi-circular arc shape. This material support surface 105 is made of an elastically deformable material, and the radius of the semi-circular arc formed can be changed by the radial movement of the adjusting arm 103. The adjusting arm 103 is slidably installed on the mounting frame 101. 1. The lower left and right sides of the bracket 106 are fixedly connected to the left and right adjusting arms 103 located at the lowest position. The two ends of the material support surface 105 extend outward to form extension sections, which are fixedly connected to the bottom of the two brackets 106 respectively, to ensure that the shape constructed by the material support surface 105 between each adjusting arm 103 always maintains a stable semi-circular arc shape; an air pump 201 is fixedly installed in the middle of the mounting frame 101; several fan-shaped frames 202 are slidably arranged on the arc surface of the mounting frame 101, and their cross-section is fan-shaped. Each fan-shaped frame 202 is arranged between adjacent adjusting arms 103. The elastic surface 203 is used to support the material support surface 105 between each adjusting arm 103; the elastic surface 203 is fixedly installed at the contact part between the fan frame 202 and the material support surface 105, the elastic surface 203 and the fan frame 202 form a closed space, which can expand when the fan frame 202 is inflated, changing the supporting effect on the material support surface 105; the two sides of the elastic surface 203 are fixedly connected to the adjacent arm head 104 respectively, so that the fan frame 202 can move radially synchronously with the adjusting arm 103; the connecting pipe 204 is fixedly installed between each fan frame 202 and the air pump 201 to realize the control operation of inflation and deflation.

[0031] When using this clamp, based on the actual dimensions of the wheel cover to be clamped, first control each adjusting arm 103 to extend radially outward, simultaneously stretching the support surface 105 to increase its semi-circular radius. At the same time, each sector frame 202 slides outward with the adjusting arm 103 under the action of the arm head 104. Then, start the air pump 201, inflating each sector frame 202 through the connecting pipe 204. The elastic surface 203 expands outward under air pressure, making minor adjustments to the unfolded support surface 105 to ensure it completely conforms to the arc contour of the wheel cover of that size. After adjustment, place the wheel cover on the support surface 105, and again operate the air pump 201 to replenish air as needed, allowing the elastic surface 203 to apply tension within a safe range through the support surface 105, thereby achieving stable fixation of the wheel cover.

[0032] This fixture changes the radius of the material support surface 105 by adjusting the radial movement of the adjusting arm 103, and adapts its shape in conjunction with the pneumatic elastic surface 203. It can quickly adapt to wheel covers with different curvature sizes without the need to change to a special fixture, significantly reducing changeover costs and shortening the changeover cycle, and meeting the needs of multi-product co-line production. At the same time, the air-inflated tensioning method can provide uniform and controllable clamping force, avoiding deformation caused by excessive contact during positioning, and effectively ensuring positional accuracy and welding quality during the welding process.

[0033] like Figures 2-4 As shown, this fixture also includes: a first motor 1031 fixedly mounted on the lower part of the mounting frame 101; a first gear 1032 rotatably mounted on the lower part of the mounting frame 101, the first gear 1032 being coaxially and fixedly connected to the output shaft of the first motor 1031; a gear ring 1033 rotatably mounted on the mounting frame 101, the gear ring 1033 meshing with the first gear 1032, the center of the gear ring 1033 coinciding with the center of the semi-circular arc frame of the mounting frame 101; and a fixedly mounted on the circular arc frame of the mounting frame 101. Several connecting plates 1034 are arranged on the arc surface, each corresponding to one of the adjusting arms 103; racks 1036 are fixedly installed on each adjusting arm 103; several second gears 1035 are rotatably installed on each connecting plate 1034, and the second gears 1035 on the same connecting plate 1034 are coaxially fixedly connected and divided into two groups according to the connection object, one group meshes with the gear ring 1033, and the other group meshes with the racks 1036 on the adjusting arm 103.

[0034] When the first motor 1031 is started, the first gear 1032 drives the gear ring 1033 to rotate. The gear ring 1033 simultaneously drives all the second gears 1035 to rotate, which in turn drives all the adjusting arms 103 to slide synchronously in the radial direction through the rack 1036. This transmission structure ensures that the radial displacement of all adjusting arms is consistent during the adjustment process, and the material support surface 105 can maintain a standard positive semi-circular arc shape before and after adjustment. There is no need to perform individual fine adjustment on each adjusting arm 103, making the operation convenient and the accuracy reliable.

[0035] like Figure 3 As shown, the connecting pipe 204 consists of a rigid section 2041 and a telescopic section 2042. The rigid section 2041 is located at one end of the connecting pipe 204 near the fan frame 202. The rigid section 2041 and the arc surface of the mounting bracket 101 form a sliding fit to ensure the guiding stability of the fan frame 202 when it moves radially. The telescopic section 2042 is connected to one side of the air pump 201. Its telescopic characteristics allow the fan frame 202 to move freely while providing an uninterrupted airflow channel for the sealed space, ensuring that the inflation and deflation functions are performed normally.

[0036] like Figure 1 , Figure 5 and Figure 6 As shown, the fixture also includes: a support plate 301 fixedly installed on the rear side of the mounting frame 101; the support plate 301 has fan-shaped sliding grooves 3011, each sliding groove 3011 corresponding to each adjusting arm 103; each sliding groove 3011 has a guide rod 3012 fixedly installed in it; and a movable seat 302 slidably installed on the support plate 301 via the sliding grooves 3011 and the guide rods 3012, each movable seat 302 being fixedly connected to the corresponding adjusting arm 103, so that when the adjusting arm 103 moves radially, the movable seat 302... The seat 302 can follow synchronously; a first electric push rod 303 is fixedly installed on each moving seat 302; a support 304 is fixedly installed on the end of the first electric push rod 303; a clamping arm 305 is rotatably installed on the support 304; an elastic band 306 is fixedly installed on the clamping arm 305, and the clamping arm 305 contacts the wheel cover through the elastic band 306; a second motor 307 is fixedly installed on the support 304, and the output shaft of the second motor 307 is coaxially and fixedly connected to the rotation shaft of the clamping arm 305.

[0037] Before loading the wheel cover, the second motor 307 is activated to drive the clamping arm 305 to flip outward, moving it away from the material support surface 105 and providing ample operating space for loading the wheel cover. When the adjusting arm 103 moves radially to change the size of the material support surface 105, the moving seat 302 slides synchronously with the adjusting arm 103, ensuring that the clamping arm 305 can be adjusted to the corresponding clamping position on the edge of the wheel cover. After adjustment, the wheel cover is placed on the material support surface 105, and the second motor 307 is activated again to drive the clamping arm 305 in the reverse direction, causing it to flip inward and press against the surface of the wheel cover, achieving reliable clamping and fixing, further preventing micro-displacement during processing and improving fixing accuracy. The elastic band 306 buffers the clamping force, effectively avoiding indentations or damage to the surface of the wheel cover and ensuring clamping safety. During welding operations, the corresponding clamping arm 305 can be individually driven outward by the first electric push rod 303 to open according to the actual needs of the welding position, thereby making room for the welding torch. This ensures the overall positioning of the workpiece is secure while providing operating space for the welding torch, improving the flexibility of the welding operation. This structure not only enables reliable fixing and safe protection of wheel covers of different sizes, but its opening and closing clearance function also facilitates loading and welding operations, further enhancing the practicality and efficiency of the fixture.

[0038] like Figure 1 , Figure 7 and Figure 8 As shown, the bottom of the mounting frame 101 is provided with a base plate 1011; the fixture also includes: a support block 401 slidably mounted on the base plate 1011 and located on the side of the mounting frame 101, the support block 401 being fixedly connected to the bracket 106; a second electric push rod 402 fixedly mounted on the support block 401; a support seat 403 fixedly mounted on the end of the second electric push rod 402, the support seat 403 being slidably engaged with the bracket 106; the mounting frame 101 has a material release structure composed of the support block 401, the second electric push rod 402 and the support seat 403 on both the left and right sides.

[0039] After the wheel cover is loaded onto the fixture and positioned, the second electric push rod 402 is activated to drive the support 403 downwards until it abuts against the lower edge of the wheel cover, providing bottom support. When unloading is required, the second electric push rod 402 is continued to be driven to lift the support 403 upwards, thus smoothly lifting the wheel cover from above the material support surface 105, achieving automatic unloading and providing support for subsequent transfer. In addition, the support block 401 and the support 403 are connected to the bracket 106, allowing the unloading structure to adapt its position synchronously with the size adjustment of the bracket 106 and the material support surface 105. This ensures that the support 403 is always aligned with the supporting part of the lower edge of the wheel cover under different wheel cover specifications, effectively improving the ease of operation and applicability of the fixture.

[0040] This fixture uses a stripping structure to automate the unloading of the wheel cover, further improving operational convenience. At the same time, its adaptive position adjustment capability further enhances the overall flexible adjustment function of the fixture.

[0041] As shown in Figure 1 and Figure 9 The fixture also includes: a base 501 located in the welding work area, with the mounting bracket 101 slidably mounted on the base 501; a slide rod 502 fixedly mounted on one side of the base 501, the slide rod 502 forming a sliding engagement with the corresponding side of the mounting bracket 101; a lead screw 503 rotatably mounted on the other side of the base 501, the lead screw 503 forming a threaded engagement with the corresponding side of the mounting bracket 101, used to drive the mounting bracket 101 and the components carried on it to reciprocate in the front-back direction; and a third motor 504 fixedly mounted on the base 501, the output shaft of the third motor 504 being coaxially and fixedly connected to the lead screw 503.

[0042] The third motor 504 is started, and the screw 503 drives the mounting frame 101 to slide back and forth along the base 501, allowing the entire fixture to actively enter and exit the welding work area. During loading and unloading, the mounting frame 101 can be moved out of the welding station to provide sufficient safety space for operators or robots and avoid interference between the welding equipment and the fixture. After clamping, the mounting frame 101 is moved back into the welding area for operation.

[0043] With the above structure, this fixture not only improves the safety and convenience of loading and unloading, but also facilitates the connection with the workstation flow in automated welding production lines, further enhancing the production line adaptability of this fixture.

[0044] Although this disclosure has been shown and described with reference to specific exemplary embodiments thereof, those skilled in the art will understand that various changes in form and detail may be made to this disclosure without departing from the spirit and scope of the disclosure as defined by the appended claims and their equivalents. Therefore, the scope of this disclosure should not be limited to the above embodiments, but should be defined not only by the appended claims, but also by their equivalents.

Claims

1. A welding fixture for automobile wheel covers, characterized in that, include: Mounting bracket (101) has a frame structure with a positive cross-section in the shape of a positive semi-circular arc on its upper part; At least three sets of limiting rods (102) are fixedly connected to the mounting bracket (101) and are equidistantly arranged along the arc surface of the mounting bracket (101). Several adjusting arms (103) are slidably connected to the arc surface of the mounting bracket (101). Each adjusting arm (103) is set with a corresponding limiting rod group and forms a sliding fit in a one-to-one correspondence. Arm head (104) fixedly connected to the arm end of each adjusting arm (103); A material support surface (105) is fixedly connected between each arm head (104). The material support surface (105) is supported by the arm head (104) and forms a positive semi-circular arc shape. The material support surface (105) is made of elastic deformable material. An air pump (201) is fixedly connected to the middle of the mounting bracket (101); Several fan-shaped frames (202) are slidably disposed on the arc surface of the mounting frame (101), and their cross-section is fan-shaped; each fan-shaped frame (202) is arranged between adjacent adjusting arms (103) to support the material support surface (105) between each adjusting arm (103); An elastic surface (203) is fixedly connected to the contact part between the fan frame (202) and the material support surface (105); the elastic surface (203) and the fan frame (202) form a closed space, which can expand when the fan frame (202) is inflated; the two sides of the elastic surface (203) are fixedly connected to the adjacent arm head (104). And a connecting pipe (204) fixedly connected between each sector frame (202) and the air pump (201).

2. The automotive wheel cover welding fixture as described in claim 1, characterized in that, The clamp also includes: brackets (106) slidably connected to the left and right sides of the lower part of the mounting frame (101), the two brackets (106) being fixedly connected to the left and right adjusting arms (103) located at the lowest position respectively; the two ends of the material support surface (105) extend outward to form extension sections, and are fixedly connected to the bottom of the two brackets (106) respectively.

3. The automotive wheel cover welding fixture as described in claim 2, characterized in that, The clamp also includes a first motor (1031) fixedly connected to the lower part of the mounting frame (101). The first gear (1032) is rotatably connected to the lower part of the mounting bracket (101), and the first gear (1032) is coaxially and fixedly connected to the output shaft of the first motor (1031); Rotate the gear ring (1033) connected to the mounting bracket (101), and the gear ring (1033) meshes with the first gear (1032); the center of the gear ring (1033) coincides with the center of the semi-circular arc frame of the mounting bracket (101); Several connecting plates (1034) are fixedly connected to the arc surface of the mounting bracket (101), and the connecting plates (1034) are set one by one to each adjusting arm (103); A rack (1036) is fixedly connected to each adjusting arm (103). And a number of second gears (1035) rotatably connected to each connecting plate (1034), the second gears (1035) on the same connecting plate (1034) are coaxially fixedly connected to each other, and are divided into two groups according to the connection object, one group meshes with the gear ring (1033), and the other group meshes with the rack (1036) on the adjusting arm (103).

4. The automotive wheel cover welding fixture as described in claim 3, characterized in that, The connecting pipe (204) consists of a rigid section (2041) and a telescopic section (2042); the rigid section (2041) is located at one end of the connecting pipe (204) near the fan frame (202), and the rigid section (2041) forms a sliding fit with the arc surface of the mounting bracket (101); the telescopic section (2042) is connected to the side of the air pump (201).

5. The automotive wheel cover welding fixture as described in claim 4, characterized in that, The clamp also includes a support plate (301) fixedly connected to the rear side of the mounting bracket (101). A movable seat (302) is slidably connected to a support plate (301); The first electric push rod (303) is fixedly connected to each movable seat (302); A support (304) is fixedly connected to the end of the first electric push rod (303); Rotate the clamping arm (305) connected to the support (304); An elastic band (306) is fixedly connected to the clamping arm (305), and the clamping arm (305) contacts the wheel cover through the elastic band (306); And a second motor (307) fixedly connected to the support (304), the output shaft of the second motor (307) being coaxially fixedly connected to the rotation shaft of the clamping arm (305).

6. The automotive wheel cover welding fixture as described in claim 5, characterized in that, Each movable seat (302) is fixedly connected to the corresponding adjusting arm (103) so that when the adjusting arm (103) moves radially, the movable seat (302) follows synchronously.

7. The automotive wheel cover welding fixture as described in claim 6, characterized in that, The bottom of the mounting bracket (101) is provided with a base plate (1011). The clamp further includes a support block (401) that is slidably connected to the base plate (1011) and located on the side of the mounting bracket (101). A second electric push rod (402) is fixedly connected to the support block (401); And a support (403) fixedly connected to the end of the second electric push rod (402); The mounting bracket (101) is provided with the above-mentioned material removal structure consisting of a support block (401), a second electric push rod (402) and a support (403) on both the left and right sides.

8. The automotive wheel cover welding fixture as described in claim 7, characterized in that, The support block (401) is fixedly connected to the bracket (106), and the support base (403) is slidably engaged with the bracket (106).

9. A welding fixture for automobile wheel covers as described in claim 8, characterized in that, The fixture further includes: a base (501) disposed in the welding operation area, and the mounting bracket (101) is slidably connected to the base (501); A slide rod (502) is fixedly connected to one side of the base (501), and the slide rod (502) forms a sliding fit with the corresponding side of the mounting bracket (101); Rotate the lead screw (503) connected to the other side of the base (501), and the lead screw (503) forms a threaded engagement with the corresponding side of the mounting bracket (101); And a third motor (504) fixedly connected to the base (501), the output shaft of the third motor (504) being coaxially fixedly connected to the lead screw (503).

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