Welding auxiliary device for automobile part production and machining

Abstract

The invention belongs to the technical field of welding machining, and particularly discloses an auxiliary welding device for automobile part production and machining, which comprises supporting plates, a sliding rail is horizontally and fixedly arranged between the supporting plates, two sliding tables are symmetrically clamped and slidably arranged on the sliding rail, and a positive and negative tooth screw rod is rotatably arranged between the supporting plates. Two sections of symmetrically arranged threads on the positive and negative tooth screw rod are in threaded connection with the two sliding tables respectively, a mounting rod is fixedly arranged on the upper side of each sliding table, a radial clamping coaxial positioning mechanism is fixedly arranged on each mounting rod, and a self-adaptive synchronous rotating mechanism is arranged on one side of each radial clamping coaxial positioning mechanism; a rotation driving mechanism is arranged between the self-adaptive synchronous rotation mechanism and the sliding table, and a positioning driving mechanism is arranged on the radial clamping coaxial positioning mechanism. Coaxial positioning and rotation adjustment at any angle of the exhaust pipe to be welded can be achieved, so that accurate butt joint of pipe openings is rapidly achieved, the scheme of driving the exhaust pipe to rotate is adopted, and the power load of a driving motor is remarkably reduced while continuous welding is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of welding processing, and specifically refers to a welding auxiliary device for production and processing of automobile parts. Background Art

[0002] In the automotive manufacturing industry, welding technology is widely used to connect various parts, from body structures to small accessories, covering a variety of materials and complex geometric shapes. The quality of welding is directly related to the safety, reliability and service life of the vehicle. Many automotive accessories, such as seat frames, suspension system components, engine brackets, etc., require precise positioning and welding in three-dimensional space, which puts higher requirements on welding equipment and processes. In the automotive exhaust system, the welding quality of the exhaust pipe directly affects the performance of the entire vehicle. The exhaust pipe is usually welded from multiple sections of pipes of different shapes and angles to meet specific exhaust path and spatial layout requirements. The traditional exhaust pipe welding process is roughly as follows: Positioning: According to the design drawings, the operator places the two exhaust pipes to be welded on the welding tooling and makes preliminary posture adjustments to align the two pipe openings. Due to the complex geometric shape of the exhaust pipe and the fact that the welding interface is usually located at any angle in three-dimensional space, this step requires repeated adjustments and is time-consuming. Especially for exhaust pipes with complex structures such as elbows, positioning is more difficult.

[0003] Clamping and fine adjustment: Use a clamp to fix the two exhaust pipe sections on the welding platform. At this stage, it is necessary to ensure that the two pipe ends are not only completely butted, but also meet a specific relative rotation angle to form the final required exhaust pipe assembly geometry. This requires the operator to have rich experience and skilled operating skills, and traditional clamps are complex and inefficient to operate.

[0004] Welding: Traditional welding methods mainly rely on manually operated welding torches to weld along the circumference of the pipe mouth. Since the pipe mouth is circular, the welding torch angle and position need to be constantly adjusted during the welding process to ensure the quality of the weld. In some cases, it is necessary to reposition the fixture after welding a certain angle, or the worker needs to adjust his own position, which further increases the difficulty and workload of welding. Circumferential welding requires extremely high skills of welders, because any slight deviation will lead to uneven welds, defects such as pores and slag inclusions, affecting the sealing and durability of the exhaust system.

[0005] In order to improve welding efficiency and quality, some improved technical solutions allow the fixture to rotate. During the fixture rotation, the exhaust pipe rotates accordingly, and the welding gun can perform continuous welding, eliminating the steps of repeated positioning or manual movement. However, this solution has obvious disadvantages. Due to the heavy weight of the welding fixture itself, rotating the fixture will significantly increase the power load of the drive motor, resulting in increased energy consumption, which is not conducive to energy conservation and emission reduction. Summary of the invention

[0006] In view of the above situation, the present invention provides a welding auxiliary device for the production and processing of automobile parts. Through a new clamping mechanism, the coaxial positioning and arbitrary angle rotation adjustment of the exhaust pipe to be welded can be achieved, so as to quickly achieve precise docking of the pipe mouth and avoid complicated operations. The solution of driving the exhaust pipe to rotate is adopted, which significantly reduces the power load of the driving motor while ensuring continuous welding, thereby avoiding energy waste.

[0007] The technical solution adopted by the present invention is as follows: The present invention proposes a welding auxiliary device for the production and processing of automobile parts, including support plates, a slide rail is horizontally fixed between the support plates, two slides are symmetrically engaged and slidably provided on the slide rail, a positive and negative threaded rod is rotatably provided between the support plates, and two sections of symmetrically arranged threads on the positive and negative threaded rod are respectively threadedly connected with the two slides, a mounting rod is fixedly provided on the upper side of each slide, a radial clamping coaxial positioning mechanism is fixedly provided on the mounting rod for coaxial positioning of the exhaust pipe, an adaptive synchronous rotation mechanism is provided on one side of the radial clamping coaxial positioning mechanism for adjusting the spatial angle of the exhaust pipe, a rotation drive mechanism is provided between the adaptive synchronous rotation mechanism and the slide, for driving the operation of the adaptive synchronous rotation mechanism, a positioning drive mechanism is provided on the radial clamping coaxial positioning mechanism, for driving the operation of the radial clamping coaxial positioning mechanism, the radial clamping coaxial positioning mechanism, the adaptive synchronous rotation mechanism, the rotation drive mechanism and the positioning drive mechanism on one mounting rod are symmetrically arranged with the radial clamping coaxial positioning mechanism, the adaptive synchronous rotation mechanism, the rotation drive mechanism and the positioning drive mechanism on the other mounting rod, so as to realize the positioning of the two exhaust pipes to be welded.

[0008] The cam is an axially fixed device for locating the rotation of the mounting plate, and the cam is a plurality of cams disposed on the mounting plate, wherein the cam is provided with a plurality of grooves, the grooves are arranged in a circle around the mounting ring axis, and the grooves are arranged in a plurality of circles along the cam axis.

[0009] Furthermore, the radial clamping coaxial positioning mechanism also includes an annular groove, which is opened on the outer arc surface of the mounting ring, the annular groove is continuous and does not intersect with the clamping groove, a swivel is tightly engaged and rotatably provided in the annular groove, the swivel and the mounting ring are coaxially arranged, a fixed seat is fixedly arranged in a circular array on the edge of the swivel, the number of the fixed seats is equal to the clamping groove, a slideway is opened through the surface of the fixed seat, one end of the slideway is close to the axis of the swivel, and the other end of the slideway is away from the axis of the swivel, all the slideways are arranged in a circular array along the axis of the swivel, and the sliding column is vertically and tightly slidably arranged in the slideway.

[0010] Furthermore, the adaptive synchronous rotation mechanism includes a pillar and a first turntable, the pillar is arranged in a circumferential array and vertically fixed on the side of the mounting ring facing away from the slot, a fixing ring is fixedly arranged at one end of the pillar, the fixing ring and the mounting ring are arranged coaxially, a fixing hole is penetrated through the circumferential array on the fixing ring, the fixing hole is opposite to the through slot, the first turntable is coaxially fixed at the end of the transmission shaft facing away from the pressure wheel, the first turntable is tightly arranged with the mounting ring, a second turntable is tightly arranged on one side of the first turntable, a third turntable is tightly arranged on one side of the second turntable, one side of the third turntable is tightly arranged with the fixing ring, a rotating shaft is coaxially fixed on one side of the third turntable, and the rotating shaft is tightly arranged The rotatable arrangement is arranged in a fixing hole, and a first slide groove open at both ends is provided on one side surface of the first rotating disk, and the first slide groove passes through the axis of the first rotating disk, and a second slide groove open at both ends is provided on one side surface of the third rotating disk, and the second slide groove passes through the axis of the third rotating disk, and a first slide bar and a second slide bar are fixedly provided on both side surfaces of the second rotating disk, respectively, and the first slide bar and the second slide bar are perpendicular to each other and both pass through the axis of the second rotating disk, the first slide bar is tightly slidably arranged with the first slide groove, and the second slide bar is tightly slidably arranged with the second slide groove, and a first sprocket is coaxially fixedly arranged after one end of the rotating shaft passes through a fixing ring, and all edges of the first sprocket wheels are cooperatively connected with the first chain.

[0011] Furthermore, the rotary drive mechanism includes a second sprocket and a second motor, the second sprocket is coaxially fixed on one side of one of the first sprockets, the second motor is fixed on the slide, a third sprocket is coaxially fixed on the output end of the second motor, and the third sprocket and the second sprocket edge are cooperatively connected with a second chain.

[0012] Furthermore, the positioning drive mechanism includes a fixed rod, a first threaded block and a second threaded block, the fixed rod is fixedly arranged on the mounting ring, the fixed rod and the sliding rod are arranged on the same side, one end of the first threaded block is engaged and rotatably arranged on the fixed rod, one end of the second threaded block is engaged and rotatably arranged on one of the fixed seats, a screw is engaged and rotatably arranged on the first threaded block, one end of the screw is threadedly connected to the second threaded block, and a rocker is fixedly arranged on the other end of the screw.

[0013] Furthermore, the diameter of the first rotating disk is smaller than the diameter of the pressing wheel.

[0014] Furthermore, a first motor is fixedly provided on one side of the support plate, and an output end of the first motor is coaxially fixedly connected to the positive and negative threaded rods.

[0015] The beneficial effects achieved by the present invention using the above structure are as follows: (1) The radial clamping coaxial positioning mechanism adopted by the present invention radially clamps the exhaust pipe through three pressure wheels evenly distributed along the circumference, ensuring that the axis of the exhaust pipe coincides with the axis of the mounting ring, thereby achieving precise coaxial positioning. The screw and the first and second threaded blocks in the positioning drive mechanism drive the slide rod to drive the pressure wheel to move radially, which can adapt to exhaust pipes of different diameters and achieve reliable clamping. The mechanism cleverly converts the circumferential contour of the exhaust pipe into radial constraints of three points, simplifies the positioning process, and improves the positioning accuracy. This effectively solves the problem of difficult and time-consuming positioning of the exhaust pipe, especially for exhaust pipes of different diameters, the advantage is more obvious.

[0016] (2) The adaptive synchronous rotation mechanism cleverly utilizes the coordination of the first, second, and third turntables. Even when the radial clamping coaxial positioning mechanism clamps exhaust pipes of different diameters, causing the axes of the first turntable and the third turntable to be offset, the rotational motion can be transmitted to the pressure wheel through the conduction effect of the second turntable, thereby driving the exhaust pipe to rotate. In conjunction with the rotary drive mechanism, the rotation angle of the exhaust pipe can be precisely controlled to achieve adjustment of any angle, and the exhaust pipe assembly can be quickly formed into any geometric shape. This design also allows the welding gun to perform continuous welding without frequently adjusting the welding gun position or repositioning the fixture, greatly improving the welding efficiency and ensuring the uniformity of the weld quality. At the same time, since the exhaust pipe is driven to rotate instead of the entire fixture, the power load of the drive motor is significantly reduced, achieving energy saving and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a schematic diagram of the three-dimensional structure of a welding auxiliary device for the production and processing of automobile parts.

[0018] Figure 2 The present invention is a structural schematic diagram of the positional relationship between a mounting rod and a radial clamping coaxial positioning mechanism of a welding auxiliary device for producing and processing automobile parts proposed by the present invention.

[0019] Figure 3 for Figure 2 Enlarged view of part A.

[0020] Figure 4 The present invention provides an exploded structural schematic diagram of the positional relationship between a mounting ring and a swivel ring of a welding auxiliary device for producing and processing automobile parts.

[0021] Figure 5 The present invention provides an exploded structural schematic diagram of the positional relationship between a slide bar and a mounting ring of a welding auxiliary device for the production and processing of automobile parts.

[0022] Figure 6 for Figure 5 Enlarged view of part B.

[0023] Figure 7 for Figure 5 Enlarged view of part C.

[0024] Figure 8 for Figure 2 Enlarged view of part D in the middle.

[0025] Fig. 9 for Figure 1 Enlarged view of part E in the middle.

[0026] Fig.10 for Figure 1 Enlarged view of part F in the middle.

[0027] Among them, 1, support plate, 2, slide rail, 3, positive and negative screw rod, 31, first motor, 4, slide table, 5, mounting rod, 6, radial clamping coaxial positioning mechanism, 61, mounting ring, 62, slot, 63, through slot, 64, slide rod, 641, slide column, 642, transmission hole, 65, ring groove, 66, swivel, 67, fixed seat, 671, slideway, 68, transmission shaft, 69, pressure wheel, 7, adaptive synchronous rotation mechanism, 71, pillar, 72, fixing ring, 721, fixing hole, 73 , the first turntable, 731, the first slide, 74, the second turntable, 741, the first slide, 742, the second slide, 75, the third turntable, 751, the second slide, 76, the rotating shaft, 77, the first sprocket, 78, the first chain, 8, the rotating drive mechanism, 81, the second sprocket, 82, the second chain, 83, the third sprocket, 84, the second motor, 9, the positioning drive mechanism, 91, the fixing rod, 92, the first threaded block, 93, the second threaded block, 94, the screw, 95, the rocker.

[0028] 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

[0029] 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.

[0030] 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.

[0031] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 As shown, the present invention proposes a welding auxiliary device for the production and processing of automobile parts, including a support plate 1, a slide rail 2 is horizontally fixed between the support plates 1, two slide tables 4 are symmetrically engaged and slidably arranged on the slide rail 2, a positive and negative threaded rod 3 is rotatably arranged between the support plates 1, and two sections of symmetrically arranged threads on the positive and negative threaded rod 3 are respectively threadedly connected with the two slide tables 4, a mounting rod 5 is fixedly arranged on the upper side of each slide table 4, a radial clamping coaxial positioning mechanism 6 is fixedly arranged on the mounting rod 5, an adaptive synchronous rotation mechanism 7 is arranged on one side of the radial clamping coaxial positioning mechanism 6, a rotation drive mechanism 8 is arranged between the adaptive synchronous rotation mechanism 7 and the slide table 4, and a positioning drive mechanism 9 is arranged on the radial clamping coaxial positioning mechanism 6, and the radial clamping coaxial positioning mechanism 6, the adaptive synchronous rotation mechanism 7, the rotation drive mechanism 8 and the positioning drive mechanism 9 on one mounting rod 5 are respectively symmetrically arranged with the radial clamping coaxial positioning mechanism 6, the adaptive synchronous rotation mechanism 7, the rotation drive mechanism 8 and the positioning drive mechanism 9 on the other mounting rod 5.

[0032] The radial clamping coaxial positioning mechanism 6 includes a mounting ring 61, which is fixedly arranged at the upper end of the mounting rod 5. The axial direction of the mounting ring 61 is the same as the translation direction of the slide 4. A slot 62 is provided on the surface of the mounting ring 61 on one side facing the other mounting ring 61. The slots 62 are arranged in three arrays along the circumference of the axial center of the mounting ring 61. The length direction of the slots 62 points to the axial center of the mounting ring 61. The slots 62 penetrate the surface of the mounting ring 61 in the length direction. The mounting ring 61 is provided with a through slot 63 at the bottom of the slot 62. The outer end of the through slot 63 is closed. The through slot 63 is in the thickness direction. A slide bar 64 penetrates the mounting ring 61 and is engaged and slidably fitted in the slot 62. A transmission hole 642 is vertically penetrated through the end of the slide bar 64 facing the axis of the mounting ring 61. A slide column 641 is vertically fixedly provided at the other end of the slide bar 64. A transmission shaft 68 is tightly and rotatably provided in the transmission hole 642. The transmission shaft 68 is tightly and slidably provided in the through slot 63. A pressure wheel 69 is coaxially fixedly provided at one end of the transmission shaft 68 facing the slot 62. The pressure wheel 69 is tightly fitted to the slide bar 64 and the mounting ring 61. When the slide bar 64 moves toward the axis of the mounting ring 61, the inner side of the pressure wheel 69 can be located inside the ring of the mounting ring 61.

[0033] Among them, the radial clamping coaxial positioning mechanism 6 also includes an annular groove 65, which is opened on the outer arc surface of the mounting ring 61, the annular groove 65 is continuous and does not intersect with the clamping groove 62, and a swivel 66 is tightly engaged and rotatably provided in the annular groove 65, and the swivel 66 is coaxially arranged with the mounting ring 61, and a fixed seat 67 is fixedly arranged in a circular array on the edge of the swivel 66, and the number of the fixed seats 67 is equal to the clamping groove 62, and a slideway 671 is opened through the surface of the fixed seat 67, one end of the slideway 671 is close to the axis of the swivel 66, and the other end of the slideway 671 is far away from the axis of the swivel 66, all the slideways 671 are arranged in a circular array along the axis of the swivel 66, and the sliding column 641 is vertically and tightly slidably arranged in the slideway 671.

[0034] Among them, the adaptive synchronous rotation mechanism 7 includes a pillar 71 and a first turntable 73. The pillars 71 are arranged in a circumferential array and are vertically fixed on the side of the mounting ring 61 facing away from the card slot 62. A fixing ring 72 is fixed at one end of the pillar 71. The fixing ring 72 is coaxially arranged with the mounting ring 61. A fixing hole 721 is opened through the circumferential array on the fixing ring 72. The fixing hole 721 is directly opposite to the through slot 63. The first turntable 73 is coaxially fixed at one end of the transmission shaft 68 facing away from the pressure wheel 69. The first turntable 73 is tightly arranged with the mounting ring 61. A second turntable 74 is tightly arranged on one side of the first turntable 73. A third turntable 75 is tightly arranged on one side of the second turntable 74. One side of the third turntable 75 is tightly arranged with the fixing ring 72. A rotating shaft 76 is coaxially fixed on one side of the third turntable 75. The rotating shaft 76 is tightly arranged and rotatably arranged on the fixing hole In 721, a first slide groove 731 with open ends is provided on one side surface of the first turntable 73, and the first slide groove 731 passes through the axis of the first turntable 73; a second slide groove 751 with open ends is provided on one side surface of the third turntable 75, and the second slide groove 751 passes through the axis of the third turntable 75; first slide bars 741 and second slide bars 742 are fixedly provided on both side surfaces of the second turntable 74, respectively; the first slide bars 741 and the second slide bars 742 are perpendicular to each other and both pass through the axis of the second turntable 74; the first slide bar 741 is tightly slidably arranged with the first slide groove 731, and the second slide bar 742 is tightly slidably arranged with the second slide groove 751; one end of the rotating shaft 76 passes through the fixing ring 72 and is coaxially fixed with a first sprocket 77, and the edges of all the first sprockets 77 are jointly connected with a first chain 78.

[0035] In the above arrangement, the third rotating disk 75 and the rotating shaft 76 rotate with the fixing hole 721 as the axis, and when the slide bar 64 is fixed, the pressure wheel 69 and the transmission shaft 68 rotate with the transmission hole 642 as the axis, and the second rotating disk 74 will play a role in transmitting the rotation action between the first rotating disk 73 and the third rotating disk 75. Specifically, when the first sliding strips 741 and the second sliding strips 742 vertically arranged on both sides of the second rotating disk 74 are respectively engaged by the first sliding grooves 731 and the second sliding grooves 751, the second rotating disk 74 will not be able to freely detach from the first rotating disk 73 and the third rotating disk 75, the rotation of the third turntable 75 will drive the second turntable 74 to rotate, and the second slide bar 742 can slide arbitrarily in the second slide groove 751 while transmitting the rotation action, and the rotation of the second turntable 74 will drive the first turntable 73 to rotate, and the first slide bar 741 can slide arbitrarily in the first slide groove 731 while transmitting the rotation action. Under this setting, the first turntable 73 and the third turntable 75 can also transmit the rotation when they are not on the same axis, and further realize that the position change of the pressure wheel 69 can also be transmitted to realize rotation when the first sprocket 77 is fixed.

[0036] Among them, the rotating drive mechanism 8 includes a second sprocket 81 and a second motor 84. The second sprocket 81 is coaxially fixed on one side of one of the first sprockets 77. The second motor 84 is fixed on the slide 4. The output end of the second motor 84 is coaxially fixed with a third sprocket 83. The third sprocket 83 and the edge of the second sprocket 81 are jointly connected with a second chain 82. Through the above settings, the second motor 84 is turned on to drive the third sprocket 83 and then drive the second sprocket 81 to rotate through the second chain 82, thereby driving the adjacent first sprocket 77 to rotate, and all the first sprockets 77 are driven to rotate synchronously through the first chain 78.

[0037] The positioning drive mechanism 9 includes a fixed rod 91, a first threaded block 92 and a second threaded block 93. The fixed rod 91 is fixedly arranged on the mounting ring 61. The fixed rod 91 and the sliding rod 64 are arranged on the same side. One end of the first threaded block 92 is engaged and rotatably arranged on the fixed rod 91. One end of the second threaded block 93 is engaged and rotatably arranged on one of the fixing seats 67. A screw rod 94 is engaged and rotatably arranged on the first threaded block 92. One end of the screw rod 94 is threadedly connected to the second threaded block 93. The other end of the screw rod 94 is fixedly provided with a rocker 95. Through the above arrangement, when the screw rod 94 rotates itself, one end of the screw rod 94 is engaged and limited by the first threaded block 92, and the other end of the screw rod 94 is engaged and limited by the second threaded block 93. The threaded movement will drive the second threaded block 93 to translate on the screw rod 94, and the second threaded block 93 will also drive the fixed seat 67 to rotate around the axis of the mounting ring 61. Since the second threaded block 93 can rotate at any angle relative to the fixed seat 67, and the first threaded block 92 can rotate at any angle relative to the fixed rod 91, the first threaded block 92 and the second threaded block 93 can rotate in real time to adapt to the position change of the fixed seat 67 relative to the fixed rod 91. Since the threaded movement has a self-locking function, the screw rod 94 stops rotating to fix the position of the second threaded block 93 and the fixed seat 67, and the fixed seat 67 further fixes the slide column 641 and the slide rod 64 through the slideway 671.

[0038] The diameter of the first turntable 73 is smaller than that of the pressure wheel 69. Under this arrangement, the pressure wheel 69 will first contact the exhaust pipe to clamp it when moving toward the axis of the mounting ring 61, thereby preventing the first turntable 73 from interfering with the exhaust pipe.

[0039] Among them, a first motor 31 is fixedly provided on one side of the support plate 1, and the output end of the first motor 31 is coaxially fixedly connected with the positive and negative screw rods 3. By starting the first motor 31 to drive the rotation of the positive and negative screw rods 3, the threads symmetrically arranged on the surfaces of the positive and negative screw rods 3 respectively drive the two slides 4 to move towards and away from each other.

[0040] When in use, the ends of the two exhaust pipes to be welded are respectively inserted into the mounting rings 61 from the opposite sides of the two mounting rings 61, and the following operations are performed on each mounting ring 61: the rocker 95 is rotated to drive the screw 94 to rotate, and the second threaded block 93 is translated on the screw 94 to drive the fixing seat 67 to move, and the fixing seat 67 will rotate around the axis of the mounting ring 61 through the rotating ring 66. Since one end of the slideway 671 is close to the axis of the rotating ring 66 and the other end of the slideway 671 is away from the axis of the rotating ring 66, the position change of the slideway 671 will drive all the slide bars 64 and the slide column 641 to move close to the axis of the mounting ring 61, and the slide bar 64 drives the transmission shaft 68 to move close to the mounting ring 61 in the through groove 63 through the transmission hole 642, and all the pressing wheels 69 are close to the exhaust pipe until the exhaust pipe is pressed. Tighten and stop rotating the rocker 95. At this time, the exhaust pipe is coaxial with the mounting ring 61, and the relative positions of the first turntable 73 and the third turntable 75 will change, but they are always connected by the second turntable 74. After the two sections of the exhaust pipe are clamped and fixed, the two sections of the exhaust pipe will be coaxial. Turn on one of the second motors 84 to drive the third sprocket 83, the second chain 82, and the second sprocket 81 to rotate, and then drive the adjacent first sprocket 77 to rotate, and drive all the first sprockets 77 to rotate through the first chain 78. Through the connection relationship between the third turntable 75, the second turntable 74 and the first turntable 73, the pressure wheel 69 is finally driven to rotate synchronously. Since each pressure wheel 69 rotates in the same direction, the exhaust pipe can rotate when it is in close contact with the exhaust pipe, thereby realizing the adjustment of the exhaust pipe angle.

[0041] After the relative angle adjustment of the two exhaust pipe sections is completed, the first motor 31 is turned on, and the positive and negative screw rods 3 drive the two slides 4 to approach each other, so that the two exhaust pipe sections are connected, and then welding is started. During welding, the two second motors 84 are turned on at the same time, so that the two exhaust pipe sections rotate synchronously in the same direction, and continuous welding can be achieved without moving the welding gun until the welding is completed.

[0042] 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.

[0043] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

[0044] 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 welding auxiliary device for the production and processing of automobile parts, comprising a support plate (1), characterized in that: A slide rail (2) is fixedly disposed horizontally between the support plates (1); two slide tables (4) are symmetrically engaged and slidably disposed on the slide rail (2); a positive and negative threaded rod (3) is rotatably disposed between the support plates (1); two sections of symmetrically disposed threads on the positive and negative threaded rod (3) are respectively threadedly connected to the two slide tables (4); a mounting rod (5) is fixedly disposed on the upper side of each slide table (4); a radially clamping coaxial positioning mechanism (6) is fixedly disposed on the mounting rod (5); an adaptive synchronous rotation mechanism (7) is disposed on one side of the radially clamping coaxial positioning mechanism (6); A rotation drive mechanism (8) is provided between the adaptive synchronous rotation mechanism (7) and the slide table (4), and a positioning drive mechanism (9) is provided on the radial clamping coaxial positioning mechanism (6), wherein the radial clamping coaxial positioning mechanism (6), the adaptive synchronous rotation mechanism (7), the rotation drive mechanism (8) and the positioning drive mechanism (9) on one mounting rod (5) are symmetrically arranged with the radial clamping coaxial positioning mechanism (6), the adaptive synchronous rotation mechanism (7), the rotation drive mechanism (8) and the positioning drive mechanism (9) on the other mounting rod (5).

2. The welding auxiliary device for automobile parts production and processing according to claim 1 is characterized in that: The radial clamping coaxial positioning mechanism (6) comprises a mounting ring (61), wherein the mounting ring (61) is fixedly arranged at the upper end of the mounting rod (5), the axial direction of the mounting ring (61) is the same as the translation direction of the slide table (4), a groove (62) is provided on a surface of one side of the mounting ring (61) facing the other mounting ring (61), three grooves (62) are arranged in an array along the circumference of the axial center of the mounting ring (61), the length direction of the groove (62) points to the axial center of the mounting ring (61), the groove (62) penetrates the surface of the mounting ring (61) in the length direction, and the mounting ring (61) is provided with a through groove (63) at the bottom of the groove (62), the outer end of the through groove (63) is closed, and the through groove (63) penetrates in the thickness direction. The mounting ring (61) has a slide bar (64) which is engaged and slides tightly in the slot (62). A transmission hole (642) is vertically penetrated through one end of the slide bar (64) facing the axis of the mounting ring (61). A slide column (641) is vertically fixedly provided at the other end of the slide bar (64). A transmission shaft (68) is rotatably arranged in the transmission hole (642). The transmission shaft (68) is slidably arranged in the through slot (63). A pressure wheel (69) is coaxially fixedly provided at one end of the transmission shaft (68) facing the slot (62). The pressure wheel (69) is in close contact with the slide bar (64) and the mounting ring (61). When the slide bar (64) moves toward the axis of the mounting ring (61), the inner side of the pressure wheel (69) can be located inside the ring of the mounting ring (61).

3. The welding auxiliary device for automobile parts production and processing according to claim 2 is characterized in that: The radial clamping coaxial positioning mechanism (6) further comprises an annular groove (65), wherein the annular groove (65) is provided on the outer arc surface of the mounting ring (61), the annular groove (65) is continuous and does not intersect with the clamping groove (62), a rotating ring (66) is provided in the annular groove (65) for close engagement and rotation, the rotating ring (66) is coaxially arranged with the mounting ring (61), a fixed seat (67) is fixedly provided in a circular array on the edge of the rotating ring (66), the number of the fixed seats (67) is equal to the clamping groove (62), a slideway (671) is provided through the surface of the fixed seat (67), one end of the slideway (671) is close to the axis of the rotating ring (66), and the other end of the slideway (671) is far away from the axis of the rotating ring (66), all the slideways (671) are arranged in a circular array along the axis of the rotating ring (66), and the slide column (641) is vertically and closely arranged in the slideway (671) for close sliding.

4. The welding auxiliary device for automobile parts production and processing according to claim 3 is characterized in that: The adaptive synchronous rotation mechanism (7) comprises pillars (71) and a first rotating disk (73); the pillars (71) are arranged in a circumferential array and are vertically fixed on a side of the mounting ring (61) facing away from the slot (62); a fixing ring (72) is fixedly provided at one end of the pillar (71); the fixing ring (72) is coaxially arranged with the mounting ring (61); fixing holes (721) are arranged in a circumferential array on the fixing ring (72); the fixing holes (721) are directly opposite to the through slot (63); The first rotating disk (73) is coaxially fixedly arranged at one end of the transmission shaft (68) facing away from the pressure wheel (69); the first rotating disk (73) is closely arranged with the mounting ring (61); a second rotating disk (74) is closely arranged with one side of the first rotating disk (73); a third rotating disk (75) is closely arranged with one side of the second rotating disk (74); one side of the third rotating disk (75) is closely arranged with the fixing ring (72); a rotating shaft (76) is coaxially fixedly arranged with one side of the third rotating disk (75); the rotating shaft (76) is closely arranged with the mounting ring (61); The first rotating disk (73) is rotatably arranged in the fixing hole (721), a first slide groove (731) with two ends opened is provided on one side surface of the first rotating disk (73), the first slide groove (731) passes through the axis of the first rotating disk (73), a second slide groove (751) with two ends opened is provided on one side surface of the third rotating disk (75), the second slide groove (751) passes through the axis of the third rotating disk (75), and a first slide bar (741) and a second slide bar (741) are respectively fixed on both side surfaces of the second rotating disk (74). 42), the first slide bar (741) and the second slide bar (742) are perpendicular to each other and both pass through the axis of the second rotating disk (74), the first slide bar (741) and the first slide groove (731) are closely slidably arranged, and the second slide bar (742) and the second slide groove (751) are closely slidably arranged, and one end of the rotating shaft (76) passes through the fixing ring (72) and is coaxially fixed with a first sprocket (77), and the edges of all the first sprockets (77) are cooperatively connected with a first chain (78).

5. The welding auxiliary device for automobile parts production and processing according to claim 4 is characterized in that: The rotary drive mechanism (8) comprises a second sprocket (81) and a second motor (84); the second sprocket (81) is coaxially fixedly arranged on one side of one of the first sprockets (77); the second motor (84) is fixedly arranged on the slide table (4); a third sprocket (83) is coaxially fixedly arranged at the output end of the second motor (84); the third sprocket (83) and the second sprocket (81) are cooperatively connected to the second chain (82) at their edges.

6. The welding auxiliary device for automobile parts production and processing according to claim 5 is characterized in that: The positioning drive mechanism (9) comprises a fixed rod (91), a first threaded block (92) and a second threaded block (93); the fixed rod (91) is fixedly arranged on the mounting ring (61); the fixed rod (91) and the sliding rod (64) are arranged on the same side; one end of the first threaded block (92) is rotatably mounted on the fixed rod (91); one end of the second threaded block (93) is rotatably mounted on one of the fixing seats (67); a screw rod (94) is rotatably mounted on the first threaded block (92); one end of the screw rod (94) is threadedly connected to the second threaded block (93); and a rocker (95) is fixedly arranged on the other end of the screw rod (94).

7. The welding auxiliary device for automobile parts production and processing according to claim 6 is characterized in that: The diameter of the first rotating disk (73) is smaller than the diameter of the pressing wheel (69).

8. The welding auxiliary device for automobile parts production and processing according to claim 7 is characterized in that: A first motor (31) is fixedly provided on one side of the support plate (1), and an output end of the first motor (31) is coaxially fixedly connected to the positive and negative threaded rods (3).

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