Spot welding machining device for automobile hub

Abstract

The invention discloses an automobile hub spot welding machining device and belongs to the field of welding machining, the automobile hub spot welding machining device comprises a base, a spot welding machine, a bottom plate, a top plate, an outer ring, an inner table, a rotary table and a limiting rod, the spot welding machine is arranged on the side of the base, the bottom plate is arranged above the base in a sliding mode, the top plate is arranged above the bottom plate, and the top plate comprises an upper layer plate; a first circular groove is formed in the middle of the upper layer plate in a penetrating mode, the outer ring is rotationally arranged in the first circular groove, the outer ring is in interference fit with the first circular groove, the inner table is rotationally arranged on the inner side of the outer ring and comprises a first circular table, a second circular groove is formed in the top of the first circular table, the rotary table is rotationally arranged in the second circular groove, and the limiting rod is clamped above the inner table. The hub can be effectively fixed, the risk of falling during machining can be reduced, equipment or operators can be prevented from being damaged, meanwhile, the hub can be accurately adjusted according to welding spot distribution, spot welding machining is more accurate, and the hub spot welding device can adapt to machining of hubs of various sizes and various welding spot distribution conditions.

Description

Technical Field

[0001] The invention belongs to the technical field of welding processing, and specifically relates to a spot welding processing device for an automobile wheel hub. Background Art

[0002] In the process of producing wheels, the pre-processing stage of the hub involves connecting different parts or materials through spot welding. This process can lay the foundation for subsequent processing procedures. The hub is usually composed of multiple parts, such as the hub center, rim, etc. Spot welding is used to weld these parts into a complete hub. This process requires different metal sheets or parts to be connected together through spot welding. The welding points of the hub are usually distributed in a circular array. The existing hub spot welding process is usually manually rotated and adjusted or the hub is placed on a table. The drive device drives the table and adjusts the hub rotation through friction, and rotates the welding point to the bottom of the spot welder. The spot welder applies a high voltage to make the current pass through the two parts for instantaneous heating, so that the metal parts are melted and connected together. The traditional adjustment method cannot effectively fix the hub. At the same time, the welding points of the hub are usually distributed in a circular array, and the distribution of the welding points is also different. The traditional adjustment method cannot be adjusted according to different hubs, which is easy to cause deviations in the welding points and there are certain risks. Summary of the invention

[0003] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a spot welding processing device for automobile wheel hub, which can be flexibly adjusted according to different wheel hubs and accurately locate the welding points.

[0004] The technical solution adopted by the present invention is as follows: The present invention provides a spot welding processing device for an automobile wheel hub, comprising a base, a spot welding machine, a bottom plate, a top plate, an outer ring, an inner table, a turntable and a limit rod, wherein the spot welding machine is arranged on the side of the base, the bottom plate is slidably arranged above the base, the top plate is arranged above the bottom plate, the top plate comprises an upper plate, a circular groove one is penetrated through the middle of the upper plate, the outer ring is rotatably arranged in the circular groove one, the outer ring and the circular groove one are interference fit, the inner table is rotatably arranged on the inner side of the outer ring, the inner table comprises a round table one, a round groove two is opened on the top of the round table one, the turntable is rotatably arranged in the round groove two, and the limit rod is clamped above the inner table.

[0005] Furthermore, a slide groove 1 is provided on the top wall of the base, an electric screw is provided in the slide groove 1, the bottom plate includes a lower plate, a slider 1 is provided at the bottom of the lower plate, a screw hole 1 is penetrated through the slider 1, the slider 1 is slidably arranged in the slide groove 1, the slider 1 and the slide groove 1 are in mutual contact, and the screw hole 1 is threadedly engaged with the electric screw.

[0006] Furthermore, the spot welding machine comprises an upper welding head and a lower welding head, and the upper welding head is arranged directly above the lower welding head.

[0007] Furthermore, the outer ring top wall is provided with a second annular groove.

[0008] Furthermore, the top wall of the truncated table is elastically retractable and provided with a one-way clip, which can rebound after the pressing force is removed, and the top wall of the one-way clip is inclined. A trigger rod is provided on one side wall of the truncated table, and the trigger rod is arranged under the top plate. A motor is provided on the bottom wall of the truncated table. In the initial state, the line connecting the trigger rod and the axis of the truncated table is 180° to the line connecting the spot welding machine and the axis of the truncated table.

[0009] Furthermore, a circular groove is rotatably formed on the bottom wall of the upper plate, a positioning groove is provided in the circular groove, a plurality of positioning grooves are provided and are distributed along a circular arc, a positioning slider is slidably provided in the circular groove, and the distribution of the positioning grooves is compliant with the angle of the trigger rod rotating from the initial state to the bottom of each positioning groove increasing step by step, and the angle of the trigger rod rotating from the initial state to the bottom of each positioning groove is respectively equal to the angle between each spoke in a common wheel hub with different numbers of spokes.

[0010] Furthermore, the turntable includes a second truncated table, an electric telescopic rod and a retractable cover. The second truncated table is rotatably arranged in a second circular groove. The electric telescopic rod is arranged at the top of the second truncated table. The retractable cover is arranged at the top of the electric telescopic rod. The retractable cover is a hollow truncated table with an opening at the bottom. An adjustment groove is arranged at the top of the second truncated table. The adjustment grooves are arranged in a circular array and distributed in multiple layers. The number of the adjustment grooves in each layer of the circular array increases from the inside to the outside.

[0011] Furthermore, the limiting rod includes a rod body, a plug rod is provided at the bottom of the rod body, the plug rod is inserted in the annular groove 2, the top wall of the rod body is provided with a slide groove 2, a slide rod is slidably provided in the slide groove 2, an end of the slide groove 2 away from the axis of the second truncated table is penetrated by a through hole, an end of the slide rod close to the through hole is rotatably provided with an adjusting screw, the end of the adjusting screw passes through the through hole, an end of the slide groove 2 away from the through hole and an end of the slide rod away from the through hole are provided with a spring, a slider 3 is also slidably provided in the slide groove 2, a screw hole 2 is penetrated by the slider 3, the screw hole 2 is threadedly meshed with the adjusting screw, and a hexagonal The bottom wall of the rod body is also provided with a card slot, which is arranged above the first truncated cone, and the card slot is fitted with the one-way card strip. A sliding groove three is provided at one end of the rod body close to the axis of the second truncated cone, and a slider four is provided for sliding in the sliding groove three. A sliding telescopic rod is provided at the bottom of the end of the slider four away from the rod body, and the sliding telescopic rod is fitted with the adjustment groove. An adjustment hole is provided through the side wall of the sliding groove three, and the adjustment holes are arranged in a linear array. A buckle two is elastically provided on the side wall of the fourth slider, and the buckle two is fitted with the adjustment hole. The buckle two can rebound after the pressing force is removed, and the spacing between the adjustment holes is the same as the spacing between each layer of the adjustment groove.

[0012] Furthermore, an extension plate 1 is provided on the top wall of one end of the sliding rod away from the through hole, and a shift rod is provided on the top wall of the extension plate 1.

[0013] Furthermore, an extension plate 2 is provided on the top wall of one end of the sliding block 3 close to the through hole, and a rubber rod is provided on the top of the extension plate 2.

[0014] Furthermore, the positioning slider includes a slider 2, a buckle 1 and a trigger switch, the slider 2 is slidably clamped in an annular groove 1, the buckle 1 is elastically and telescopically arranged on the top wall of the slider 2, the buckle 1 can rebound after the pressing force is removed, the buckle 1 is fitted with the positioning groove, and the trigger switch is arranged on the side wall of the slider 2. Preferably, the trigger switch is connected to the motor signal, and the one-way clamping strip is connected to the motor signal.

[0015] The beneficial effects achieved by the present invention using the above structure are as follows: the present scheme provides a spot welding processing device for automobile wheel hub. When spot welding of the wheel hub is required, the same number of limit rods can be selected according to the number of welding points of the wheel hub, and the adjusting screw can be rotated to make the distance from the rubber rod to the axis center of the turntable equal to the inner diameter of the wheel hub, and the position of the slider four can be adjusted according to the number of welding points, so that the sliding telescopic rod can be inserted into the adjustment groove layer with the same number of welding points, and then the sliding telescopic rod is inserted into the adjustment groove, and the insertion rod is inserted into the annular groove two to fix the limit rod, and the electric telescopic rod is contracted, and the contraction cover gathers the lever inward and pulls the rubber rod, and then the wheel hub can be placed on the extension plate two, the electric telescopic rod is extended, and the rubber rod is supported outward toward the inner wall of the wheel hub to fix it, and the welding point is located above the gap between the limit rods, and the welding point is moved to between the spot welding machines through the electric screw, and the positioning slider is adjusted according to the angle between the welding points. The inner table is rotated by the motor, and the inner table drives the turntable, outer ring, limit rod and wheel hub to rotate under the action of the one-way clamping strip. After the trigger rod touches the trigger switch, the trigger switch transmits an electrical signal to the motor, and the motor reverses to turn the lever to the initial position. During the reversal process, the one-way clamping strip is disengaged from the current slot and will not drive the turntable, outer ring, limit rod and wheel hub to rotate until the clamping strip enters the slot of the next limit rod. At this time, the clamping strip is pressed twice, and the electrical signal is transmitted to the motor, and the motor switches to forward rotation, continues to rotate the wheel hub, and transmits the welding point to the spot welding machine for welding. Compared with the traditional method, this method can effectively fix the wheel hub, reduce the risk of falling off during processing, and prevent damage to equipment or operators. At the same time, it can accurately adjust the wheel hub according to the distribution of weld spots, making the spot welding process more accurate, and can adapt to the processing of wheel hubs of various sizes and various weld spot distributions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of a spot welding processing device for an automobile wheel hub provided by the present invention; Figure 2A schematic diagram of the structure of a spot welding processing device for automobile wheel hub provided by the present invention without the spot welding machine and the base; Figure 3 A schematic structural diagram of another perspective of a spot welding processing device for automobile wheel hub provided by the present invention without the spot welding machine and the base; Figure 4 A schematic diagram of the structure of the top plate, outer ring, inner table, turntable and limit rod provided by the present invention; Figure 5 A schematic diagram of the structure of the top plate and the outer ring provided by the present invention; Figure 6 A bottom view of the top plate and the outer ring provided by the present invention; Figure 7 A schematic diagram of the structure of the inner table and the turntable provided by the present invention; Figure 8 A schematic diagram of the structure of the turntable provided by the present invention; Fig. 9 A schematic diagram of the structure of the limit rod provided by the present invention; Fig.10 A cross-sectional view of the limiting rod provided by the present invention; Fig.11 This is a structural schematic diagram of the positioning slider provided by the present invention.

[0017] Among them, 1. base, 2. spot welding machine, 3. bottom plate, 4. top plate, 5. outer ring, 6. inner table, 7. turntable, 8. limit rod, 101. slide groove 1, 102. electric screw, 201. upper welding head, 202. lower welding head, 301. lower plate, 302. slider 1, 303. screw hole 1, 401. upper plate, 402. circular groove 1, 403. annular groove 1, 404. positioning groove, 405, positioning slider, 406. slider 2, 407. buckle 1, 408, trigger switch, 501. annular groove 2, 601. round table 1, 602. one-way clamping strip, 603. trigger rod, 60 4. Motor, 605. Round groove two, 701. Round table two, 702. Adjusting groove, 703. Electric telescopic rod, 704. Retractable cover, 801. Rod body, 802. Insert rod, 803. Slide groove two, 804. Slide rod, 805. Extension plate one, 806. Push rod, 807. Adjusting screw, 808. Sliding block three, 809. Extension plate two, 810. Rubber rod, 811. Through hole, 812. Hexagonal groove, 813. Spring, 814. Screw hole two, 815. Slot, 816. Slide groove three, 817. Sliding block four, 818. Sliding telescopic rod, 819. Adjusting hole, 820. Buckle two.

[0018] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be understood that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0021] like Figure 1-Figure 11 As shown, the present invention provides a spot welding processing device for automobile wheel hub, comprising a base 1, a spot welding machine 2, a bottom plate 3, a top plate 4, an outer ring 5, an inner platform 6, a turntable 7 and a limiting rod 8, the spot welding machine 2 is arranged on the side of the base 1, the bottom plate 3 is slidably arranged above the base 1, the top plate 4 is arranged above the bottom plate 3, the top plate 4 comprises an upper plate 401, a circular groove 1 402 is penetrated through the middle of the upper plate 401, the outer ring 5 is rotatably arranged in the circular groove 1 402, the outer ring 5 and the circular groove 1 402 are interference fit, the inner platform 6 is rotatably arranged on the inner side of the outer ring 5, the inner platform 6 comprises a round table 1 601, a round groove 2 605 is opened on the top of the round table 1 601, the turntable 7 is rotatably arranged in the round groove 2 605, and the limiting rod 8 is clamped on the top of the inner platform 6.

[0022] A slide groove 101 is provided on the top wall of the base 1, and an electric screw 102 is provided in the slide groove 101. The bottom plate 3 includes a lower plate 301, and a slider 302 is provided at the bottom of the lower plate 301. A screw hole 303 is penetrated through the slider 302. The slider 302 is slidably arranged in the slide groove 101, the slider 302 and the slide groove 101 are fitted together, and the screw hole 303 is threadedly engaged with the electric screw 102.

[0023] The spot welding machine 2 includes an upper welding head 201 and a lower welding head 202 . The upper welding head 201 is disposed directly above the lower welding head 202 .

[0024] The top wall of the outer ring 5 is provided with an annular groove 501 .

[0025] The top wall of the truncated table 601 is elastically retractable and is provided with a one-way clip 602, which can rebound after the pressing force is removed, and the top wall of the one-way clip 602 is inclined. The side wall of the truncated table 601 is provided with a trigger rod 603, and the trigger rod 603 is arranged below the top plate 4. The bottom wall of the truncated table 601 is provided with a motor 604. In the initial state, the line connecting the trigger rod 603 and the axis of the truncated table 601 is 180° to the line connecting the spot welding machine 2 and the axis of the truncated table 601.

[0026] An annular groove 403 is rotatably opened on the bottom wall of the upper plate 401, and a positioning groove 404 is arranged in the annular groove 403. There are multiple positioning grooves 404 and they are distributed along a circular arc line. A positioning slider 405 is slidably arranged in the annular groove 403. The distribution of the positioning grooves 404 complies with the angle that the trigger rod 603 rotates from the initial state to the angle directly below each positioning groove 404 increases step by step, and the angle that the trigger rod 603 rotates from the initial state to the angle directly below each positioning groove 404 is equal to the angle between each spoke in a common wheel hub with different spoke numbers.

[0027] The turntable 7 includes a second truncated table 701, an electric telescopic rod 703 and a retractable cover 704. The second truncated table 701 is rotatably arranged in the second circular groove 605. The electric telescopic rod 703 is arranged on the top of the second truncated table 701. The retractable cover 704 is arranged on the top of the electric telescopic rod 703. The retractable cover 704 is a hollow truncated table with an opening at the bottom. An adjustment groove 702 is opened on the top of the second truncated table 701. The adjustment grooves 702 are arranged in a circular array and are distributed in multiple layers. The number of the adjustment grooves 702 in each layer of the circular array increases from the inside to the outside.

[0028] The limiting rod 8 includes a rod body 801, a plug rod 802 is provided at the bottom of the rod body 801, the plug rod 802 is inserted into the annular groove 501, a slide groove 803 is provided on the top wall of the rod body 801, a slide rod 804 is slidably provided in the slide groove 803, a through hole 811 is penetrated at one end of the slide groove 803 away from the axis of the truncated table 701, an adjusting screw 807 is rotatably provided at one end of the slide rod 804 close to the through hole 811, and the end of the adjusting screw 807 passes through the through hole 811, a spring 813 is provided at one end of the slide groove 803 away from the through hole 811 and the end of the slide rod 804 away from the through hole 811, a slider 3 808 is also slidably provided in the slide groove 803, a screw hole 814 is penetrated by the slider 3 808, the screw hole 814 is threadedly engaged with the adjusting screw 807, and six screw holes are provided at the end of the adjusting screw 807 Angle groove 812, the bottom wall of the rod body 801 is also provided with a card slot 815, the card slot 815 is arranged above the truncated table 1 601, the card slot 815 is fitted with the one-way card strip 602, the end of the rod body 801 close to the axis of the truncated table 2 701 is provided with a slide groove 3 816, a slider 4 817 is slidably provided in the slide groove 3 816, and a sliding telescopic rod 818 is provided at the bottom of the end of the slider 4 817 away from the rod body 801, and the sliding telescopic rod 818 is fitted with the adjustment groove 702, and an adjustment hole 819 is opened through the side wall of the slide groove 3 816, and the adjustment holes 819 are arranged in a linear array, and the side wall of the slider 4 817 is elastically extended and provided with a buckle 2 820, the buckle 2 820 is fitted with the adjustment hole 819, and the buckle 2 820 can rebound after the pressing force is removed, and the spacing between the adjustment holes 819 is the same as the spacing between each layer of the adjustment groove 702.

[0029] An extension plate 805 is provided on the top wall of one end of the sliding rod 804 away from the through hole 811 , and a lever 806 is provided on the top wall of the extension plate 805 .

[0030] An extension plate 2 809 is provided on the top wall of one end of the slider 3 808 close to the through hole 811 , and a rubber rod 810 is provided on the top of the extension plate 2 809 .

[0031] The positioning slider 405 includes a slider 2 406, a buckle 1 407 and a trigger switch 408. The slider 2 406 is slidably clamped in the annular groove 1 403. The buckle 1 407 is elastically and telescopically arranged on the top wall of the slider 2 406. The buckle 1 407 can rebound after the pressing force is removed. The buckle 1 407 is fitted with the positioning groove 404. The trigger switch 408 is arranged on the side wall of the slider 2 406. Preferably, the trigger switch 408 is connected to the motor 604 signal, and the one-way clamping strip 602 is connected to the motor 604 signal.

[0032] When in use, first select the same number of limit rods 8 according to the number of welding points of the wheel hub, rotate the adjusting screw 807, so that the distance from the rubber rod 810 to the axis of the turntable 7 is equal to the inner diameter of the wheel hub, and according to the number of welding points, press the buckle 2 820 inward, pull the slider 4 817, and adjust the position of the sliding telescopic rod 818 so that the distance from the insertion rod 802 to the sliding telescopic rod 818 is equal to the distance from the annular groove 2 501 to the adjustment groove 702 with the same number as the circular array of welding points, and the sliding telescopic rod 818 can be inserted into the adjustment groove 702 of the same layer as the number of welding points, and then insert the sliding telescopic rod 818 into the adjustment groove 702, and insert the insertion rod 802 into the annular groove 501. The second groove 501 fixes the limit rod 8 and shrinks the electric telescopic rod 703. The shrink cover 704 brings the lever 806 inward and pulls the rubber rod 810. Then the wheel hub can be placed on the second extension plate 809. The electric telescopic rod 703 extends and the rubber rod 810 is supported outward toward the inner wall of the wheel hub to fix the wheel hub and make the welding point located above the gap between the limit rods 8. The welding point is moved to between the spot welding machines 2 through the electric screw 102. At this time, the turntable 7 and the outer ring 5 are locked with the sliding telescopic rod 818 and the friction between the plug rod 802 and the annular groove 501. Then the fixed position is adjusted according to the angle between the welding points. The trigger rod 603 is rotated to the position of the slider 405 so that the angle required by the trigger switch 408 is the same as the angle between the welding points, and welding can begin (if the limit rod 8 affects the welding work of the spot welder 2, it is necessary to control the motor 604 to adjust the initial position of the trigger rod 603 and rotate the annular groove 403 to make the adjustment groove 702 cooperate with the trigger rod 603), the upper welding head 201 and the lower welding head 202 are extended to spot weld the wheel hub. After the spot welding at the current point is completed, the motor 604 controls the inner table 6 to rotate. Under the action of the one-way clamping strip 602, the inner table 6 drives the turntable 7, the outer ring 5, the limit rod 8 and the wheel hub to rotate. After the trigger rod 603 touches the trigger switch 408, the trigger switch 408 transmits an electrical signal, and the motor 604 reverses to turn the lever 806 to the initial position. During the reversal process, the one-way clamping strip 602 escapes from the current clamping slot 815, and will not drive the turntable 7, the outer ring 5, the limit rod 8 and the wheel hub to rotate, until the clamping strip enters the clamping slot 815 of the next limit rod 8. At this time, the clamping strip is pressed twice by the bottom wall of the limit rod 8, and the electrical signal is transmitted to the motor 604. After that, the motor 604 switches to forward rotation and continues to rotate the wheel hub to transmit the welding point to the spot welder 2. After completing the welding of each point, the electric screw 102 is controlled to move the bottom plate 3 away from the spot welder 2. At the same time, the electric telescopic rod 703 contracts again to cause the rubber rod 810 to contract centripetally, remove the wheel hub, and complete the processing.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0034] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A spot welding processing device for automobile wheel hub, characterized in that: The invention comprises a base (1), a spot welding machine (2), a bottom plate (3), a top plate (4), an outer ring (5), an inner platform (6), a turntable (7) and a limit rod (8), wherein the spot welding machine (2) is arranged on the side of the base (1), the bottom plate (3) is slidably arranged above the base (1), the top plate (4) is arranged above the bottom plate (3), the top plate (4) comprises an upper plate (401), a circular groove (402) is provided through the middle of the upper plate (401), the outer ring (5) is rotatably arranged in the circular groove (402), the outer ring (5) and the circular groove (402) are interference fit, the inner platform (6) is rotatably arranged on the inner side of the outer ring (5), the inner platform (6) comprises a round platform (601), a round groove (602) is provided on the top of the round platform (601), and a round groove (603) is provided on the top of the round platform (601). 05), the turntable (7) is rotatably arranged in the circular groove 2 (605), the limit rod (8) is clamped on the top of the inner platform (6), the top wall of the base (1) is provided with a slide groove 1 (101), and the slide groove 1 (101) is provided with an electric screw (102), the bottom plate (3) includes a lower plate (301), the bottom of the lower plate (301) is provided with a slider 1 (302), the slider 1 (302) is penetrated by a screw hole 1 (303), the slider 1 (302) is slidably arranged in the slide groove 1 (101), the slider 1 (302) and the slide groove 1 (101) are mutually fitted, the screw hole 1 (303) is threadedly engaged with the electric screw (102), and the top wall of the outer ring (5) is provided with an annular groove 2 (501).

2. The automobile wheel hub spot welding processing device according to claim 1, characterized in that: The bottom wall of the upper plate (401) is rotatably provided with an annular groove (403), a positioning groove (404) is provided in the annular groove (403), a plurality of the positioning grooves (404) are provided and distributed along an arc line, and a positioning slider (405) is provided in the annular groove (403) for sliding.

3. The automobile wheel hub spot welding processing device according to claim 2, characterized in that: The turntable (7) comprises a second truncated table (701), an electric telescopic rod (703) and a retractable cover (704); the second truncated table (701) is rotatably arranged in a second circular groove (605); the electric telescopic rod (703) is arranged on the top of the second truncated table (701); the retractable cover (704) is arranged on the top of the electric telescopic rod (703); the retractable cover (704) is a hollow truncated table with an opening at the bottom; and an adjustment groove (702) is provided on the top of the second truncated table (701).

4. The automobile wheel hub spot welding processing device according to claim 3, characterized in that: The top wall of the truncated table (601) is elastically retractable and is provided with a one-way clip (602), which can rebound after the pressing force is removed. The top wall of the one-way clip (602) is inclined. The side wall of the truncated table (601) is provided with a trigger rod (603), which is arranged below the top plate (4). The bottom wall of the truncated table (601) is provided with a motor (604).

5. The automobile wheel hub spot welding processing device according to claim 4, characterized in that: The positioning slider (405) comprises a slider 2 (406), a buckle 1 (407) and a trigger switch (408); the slider 2 (406) is slidably clamped in the annular groove 1 (403); the buckle 1 (407) is elastically and telescopically arranged on the top wall of the slider 2 (406); the buckle 1 (407) can rebound after the pressing force is removed; the buckle 1 (407) is fitted with the positioning groove (404); and the trigger switch (408) is arranged on the side wall of the slider 2 (406).

6. The automobile wheel hub spot welding processing device according to claim 5, characterized in that: The limiting rod (8) comprises a rod body (801), a plug rod (802) is provided at the bottom of the rod body (801), the plug rod (802) is inserted into the annular groove (501), a slide groove (803) is provided on the top wall of the rod body (801), a slide rod (804) is provided in the slide groove (803) for sliding, a through hole (811) is penetrated at one end of the slide groove (803) away from the axis of the second truncated table (701), and an adjustment rod (804) is provided at one end of the slide rod (804) close to the through hole (811) for rotation. The adjusting screw (807) has a distal end that passes through a through hole (811), and a spring (813) is provided between one end of the second slide groove (803) away from the through hole (811) and one end of the slide rod (804) away from the through hole (811). A slider (808) is also slidably provided in the second slide groove (803), and a screw hole (814) is provided through the slider (808). The screw hole (814) is threadedly engaged with the adjusting screw (807). The distal end of the adjusting screw (807) is opened. A hexagonal groove (812) is provided, and a clamping groove (815) is also provided on the bottom wall of the rod body (801). The clamping groove (815) is provided above the truncated platform (601), and the clamping groove (815) is fitted with the one-way clamping strip (602). A sliding groove (816) is provided at one end of the rod body (801) close to the axis of the truncated platform (701), and a sliding block (817) is provided in the sliding groove (816) for sliding. A sliding telescopic rod (818) is provided at the bottom of the end of the sliding block (817) away from the rod body (801). ), the sliding telescopic rod (818) is fitted with the adjustment groove (702), the side wall of the slide groove three (816) is penetrated with an adjustment hole (819), the adjustment holes (819) are arranged in a linear array, the side wall of the slider four (817) is elastically telescopically provided with a buckle two (820), the buckle two (820) is fitted with the adjustment hole (819), the buckle two (820) can rebound after the pressing force is removed, and the spacing between the adjustment holes (819) is the same as the spacing between each layer of the adjustment groove (702).

7. The automobile wheel hub spot welding processing device according to claim 6, characterized in that: An extension plate 1 (805) is provided on the top wall of one end of the sliding rod (804) away from the through hole (811), and a lever (806) is provided on the top wall of the extension plate 1 (805).

8. The automobile wheel hub spot welding processing device according to claim 7, characterized in that: An extension plate 2 (809) is provided on the top wall of one end of the sliding block 3 (808) close to the through hole (811), and a rubber rod (810) is provided on the top of the extension plate 2 (809).

9. The automobile wheel hub spot welding processing device according to claim 8, characterized in that: The spot welding machine (2) comprises an upper welding head (201) and a lower welding head (202), wherein the upper welding head (201) is arranged directly above the lower welding head (202).

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