Positioning mechanism for automobile part machining and welding

Abstract

The invention relates to the field of workpiece positioning, and discloses a positioning mechanism for automobile part machining and welding, which comprises a working platform and a plurality of adjustable limiting and clamping mechanisms detachably connected to the working platform, the adjustable limiting clamping mechanism comprises a lower supporting mechanism detachably connected to the working platform, two hinge point adjusting mechanisms symmetrically connected to the lower supporting mechanism, a torque adjusting mechanism fixedly connected to the hinge point adjusting mechanisms and an upper pressing mechanism arranged over the lower supporting mechanism. The lower supporting mechanism and the upper pressing mechanism are hinged through the hinge point adjusting mechanism. The hinge point of the clamp type clamp can be automatically adjusted, the position and the opening and closing state of the hinge area of the clamp type clamp can be adjusted on the premise that the clamp type clamp can stably clamp a workpiece, and therefore the clamp type clamp can adapt to the process that a welding mechanical arm surrounds the workpiece to conduct continuous welding; and the welding manipulator cannot be blocked in the continuous surrounding process, the cost is low, and the economic benefit is high.

Description

Technical Field

[0001] The invention relates to the field of workpiece positioning, and more specifically, to a positioning mechanism for processing and welding automobile parts. Background Art

[0002] The body components of a car are mainly made of cold-rolled steel stampings with good stamping and welding processability, which are assembled and welded.

[0003] During the welding process, in order to improve the welding accuracy, multiple clamps are required to limit and clamp each component. The clamps need to be designed according to the specific shapes of the components, but the clamp-type clamps are the most common. However, this type of clamp-type clamp needs to be fixed on the workbench and is close to the workpiece. It is not suitable for welding solutions that perform circumferential continuous welding on the edges of components. The upper and lower extrusion limit clamps require the arrangement of a mobile gantry and a large number of limit structures at high altitudes. The cost of achieving automated control is high, and it is not suitable for small and medium-sized manufacturers. Summary of the invention

[0004] The object of the present invention is to provide a positioning mechanism for automobile parts processing and welding in order to solve the above-mentioned problems.

[0005] The present invention provides a positioning mechanism for automobile parts processing and welding, comprising a working platform, and a plurality of adjustable limiting clamping mechanisms detachably connected to the working platform, wherein the adjustable limiting clamping mechanisms are used for limiting and clamping workpieces;

[0006] The adjustable limit clamping mechanism includes a lower support mechanism detachably connected to the working platform, two hinge point adjustment mechanisms symmetrically connected to the lower support mechanism, a torque adjustment mechanism fixedly connected to the hinge point adjustment mechanism, and an upper pressing mechanism arranged just above the lower support mechanism, wherein the two ends of the lower support mechanism and the two ends of the upper pressing mechanism are respectively hinged through the corresponding hinge point adjustment mechanisms;

[0007] The lower support mechanism includes a retractable support assembly, two first arc-shaped hinged plates slidably connected to the retractable support assembly, a hinge groove is provided on one end of the first arc-shaped hinged plate, a first hinge hole is provided on the side wall of the hinge groove, the two first arc-shaped hinged plates are symmetrically arranged, the retractable support assembly is used to support the workpiece, the upper pressing mechanism includes a retractable pressing assembly, two second arc-shaped hinged plates slidably connected to the retractable support assembly, a second hinge hole and a plug hole are provided on the second arc-shaped hinged plate, the second hinge hole is matched with the first hinge hole, and the retractable pressing assembly is used to press the workpiece;

[0008] The hinge point adjustment mechanism includes a position adjustment component and a hinge rod connected to the output end of the position adjustment component, the position adjustment component is used to sequentially pass the hinge rod through the first hinge hole and the second hinge hole in a coaxial state, and the torque adjustment mechanism is used to drive the second arc hinge plate to rotate around the hinge rod;

[0009] The retractable support assembly and the retractable compression assembly are both provided with a telescopic adjustment mechanism, which is used to adjust the arc length of the first arc hinge plate and the second arc hinge plate to retract into the retractable support assembly and the retractable compression assembly respectively, and the other ends of the first arc hinge plate and the second arc hinge plate are both provided with a limit assembly, which is used to adjust the connection state of the first arc hinge plate and the second arc hinge plate with the retractable support assembly and the retractable compression assembly.

[0010] As a further optimization scheme of the present invention, the storage-type support assembly includes a support base detachably connected to the working platform, a lower arc-shaped storage piece fixedly connected to the support base, a plurality of lower connecting blocks fixedly connected to the lower arc-shaped storage piece, and a lower support block detachably connected to the lower connecting block, the interior of the lower arc-shaped storage piece is provided with two symmetrically distributed first arc-shaped storage grooves, and the other end of the first arc-shaped hinged plate is slidably connected to the inner wall of the first arc-shaped storage groove.

[0011] As a further optimization scheme of the present invention, the storage-type compression assembly includes an upper arc-shaped storage piece, a plurality of upper connecting blocks fixedly connected to the upper arc-shaped storage piece, and an upper compression block detachably connected to the upper connecting block. The interior of the upper arc-shaped storage piece is provided with two symmetrically distributed second arc-shaped storage grooves, and the other end of the second arc-shaped hinged plate is slidably connected to the inner wall of the second arc-shaped storage groove.

[0012] As a further optimization solution of the present invention, a limiting slot is provided on the inner wall of the first arc-shaped receiving groove and the second receiving groove at a position close to the outlet, and the limiting slot is matched with the limiting assembly.

[0013] As a further optimization scheme of the present invention, the position adjustment component includes a first electric telescopic rod fixedly connected to the support seat and a second electric telescopic rod connected to the output end of the first electric telescopic rod. The first electric telescopic rod is arranged perpendicular to the working platform, and the second electric telescopic rod is arranged parallel to the working platform.

[0014] As a further optimization scheme of the present invention, the torque adjustment mechanism includes an angle adjustment component connected to the housing of the second electric telescopic rod and a torque applying component connected to the angle adjustment component, the angle adjustment component is used to adjust the rotation angle of the torque applying component, and the torque applying component is used to apply torque to the second arc-shaped hinged plate.

[0015] As a further optimization scheme of the present invention, the angle adjustment assembly includes a connecting frame connected to the second electric telescopic rod housing and an adjustment motor fixedly connected to the connecting frame, the torque application assembly is movably connected to the connecting frame, and the output shaft of the adjustment motor is connected to the torque application assembly.

[0016] As a further optimization scheme of the present invention, the torque application assembly includes a third electric telescopic rod, a fourth electric telescopic rod connected to the output end of the third electric telescopic rod, and an insertion rod connected to the output end of the fourth electric telescopic rod, the insertion rod is matched with the socket, the fourth electric telescopic rod is parallel to the working platform, and the third electric telescopic rod is movably connected to the connecting frame.

[0017] As a further optimization scheme of the present invention, the telescopic adjustment mechanism includes a first electromagnet and a first spring, the first electromagnet is fixedly connected to the inner wall of the first arc-shaped storage groove or the second arc-shaped storage groove, and the first spring is located between the first electromagnet and the first arc-shaped hinge plate or the second arc-shaped hinge plate.

[0018] As a further optimization scheme of the present invention, the limit assembly includes an installation chamber arranged inside the first arc-shaped hinge plate or the second arc-shaped hinge plate, a second electromagnet fixedly connected to the inner wall of the installation chamber, a convex-shaped limit plug slidably connected to the inner wall of the installation chamber, and a second spring arranged between the second electromagnet and the convex-shaped limit plug, and the convex-shaped limit plug is matched with the limit slot.

[0019] The beneficial effects of the present invention are that the hinge point of the clamp-type clamp in the present invention can be automatically adjusted. On the premise of ensuring that the clamp-type clamp can stably clamp the workpiece, the position and opening and closing state of the hinge area of ​​the clamp-type clamp can be adjusted, so that the process of the welding robot surrounding the workpiece for continuous welding can be adapted, and the welding robot will not be obstructed in the continuous surrounding process, with low cost and high economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 The present invention Figure 1 Magnified view at A in the middle;

[0022] Figure 3 is a front view of the present invention;

[0023] Figure 4 The present invention Figure 3 Sectional view at the middle BB;

[0024] Figure 5 The present invention Figure 4 Magnified view at center C.

[0025] In the figure: 1. working platform; 2. lower supporting mechanism; 201. supporting seat; 202. lower arc-shaped storage member; 203. lower connecting block; 204. lower supporting block; 205. first arc-shaped hinged plate; 3. upper pressing mechanism; 301. upper arc-shaped storage member; 302. upper connecting block; 303. upper pressing block; 304. second arc-shaped hinged plate; 3040. jack; 4. hinge point adjusting mechanism; 401. first electric telescopic rod; 402. second electric telescopic rod; 403. hinged rod; 5. torque adjusting mechanism; 501. connecting frame; 502. adjusting motor; 503. third electric telescopic rod; 504. fourth electric telescopic rod; 505. plug rod; 6. telescopic adjusting mechanism; 601. first electromagnet; 602. first spring; 701. second electromagnet; 702. second spring; 703. convex-shaped limit plug block. DETAILED DESCRIPTION

[0026] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only intended to enable those skilled in the art to better understand and implement the subject matter described herein. In addition, the features described relative to some examples may also be combined in other examples.

[0027] like Figure 1-Figure 5 As shown, a positioning mechanism for automobile parts processing and welding includes a working platform 1, and a plurality of adjustable limit clamping mechanisms detachably connected to the working platform 1, wherein the adjustable limit clamping mechanisms are used to limit and clamp the workpiece;

[0028] The adjustable limit clamping mechanism comprises a lower support mechanism 2 detachably connected to the working platform 1, two hinge point adjustment mechanisms 4 symmetrically connected to the lower support mechanism 2, a torque adjustment mechanism 5 fixedly connected to the hinge point adjustment mechanism 4, and an upper pressing mechanism 3 arranged just above the lower support mechanism 2. The two ends of the lower support mechanism 2 and the two ends of the upper pressing mechanism 3 are respectively hinged through the corresponding hinge point adjustment mechanisms 4.

[0029] The lower support mechanism 2 includes a retractable support assembly, two first arc-shaped hinged plates 205 slidably connected to the retractable support assembly, a hinge groove is provided on one end of the first arc-shaped hinged plate 205, a first hinge hole is provided on the side wall of the hinge groove, the two first arc-shaped hinged plates 205 are symmetrically arranged, the retractable support assembly is used to support the workpiece, the upper pressing mechanism 3 includes a retractable pressing assembly, two second arc-shaped hinged plates 304 slidably connected to the retractable support assembly, a second hinge hole and a plug hole 3040 are provided on the second arc-shaped hinged plate 304, the second hinge hole is matched with the first hinge hole, and the retractable pressing assembly is used to press the workpiece;

[0030] The hinge point adjustment mechanism 4 includes a position adjustment component and a hinge rod 403 connected to the output end of the position adjustment component. The position adjustment component is used to sequentially pass the hinge rod 403 through the first hinge hole and the second hinge hole in a coaxial state. The torque adjustment mechanism 5 is used to drive the second arc-shaped hinge plate 304 to rotate around the hinge rod 403.

[0031] A telescopic adjustment mechanism 6 is provided in the retractable support assembly and the retractable compression assembly, and the telescopic adjustment mechanism 6 is used to adjust the arc length of the first arc hinge plate 205 and the second arc hinge plate 304 to retract into the retractable support assembly and the retractable compression assembly respectively. The other ends of the first arc hinge plate 205 and the second arc hinge plate 304 are provided with a limit assembly, and the limit assembly is used to adjust the connection state of the first arc hinge plate 205 and the second arc hinge plate 304 with the retractable support assembly and the retractable compression assembly.

[0032] It should be noted that when positioning and clamping the workpiece, the workpiece to be welded is placed on the retractable support assembly through auxiliary equipment such as a workpiece transport robot or a manipulator. At this time, only one group of adjacent first arc-shaped hinge plates 205 and second arc-shaped hinge plates 304 are hinged through the corresponding hinge point adjustment mechanism 4, and another group of adjacent first arc-shaped hinge plates 205 and second arc-shaped hinge plates 304 are in a separated state. Then, a thrust is applied to the second arc-shaped hinge plate 304 in a hinged state through the torque adjustment mechanism 5, so that the second arc-shaped hinge plate 304 rotates around the axis of the hinge with the first arc-shaped hinge plate 205, and the rotation direction is toward the workpiece. When the second arc-shaped hinge plate 304 rotates, it drives the retractable compression The components rotate in the same direction and at the same angle until the retractable pressing component contacts the workpiece, and applies a set pressure value to the workpiece under the thrust provided by the torque adjustment mechanism 5, thereby forming a limit clamping mechanism with the corresponding retractable support component, thereby stably positioning and clamping the workpiece. When performing continuous welding, in order to facilitate the welding robot to directly pass through the hinge area of ​​the first arc hinge plate 205 and the second arc hinge plate 304, the other set of unhinged first arc hinge plates 205 and second arc hinge plates 304 can be ejected from the retractable support component and the retractable pressing component by controlling the corresponding telescopic adjustment mechanism 6. After ejection, the first arc hinge plate 205 and the second arc hinge plate 304 contact each other. , and make the first hinge hole and the second hinge hole coaxial, at this time, the first arc hinge plate 205 and the retractable support assembly, as well as the second arc hinge plate 304 and the retractable compression assembly are all limitedly connected by the limiting assembly, so that the sliding connection state between the first arc hinge plate 205 and the retractable support assembly, as well as the second arc hinge plate 304 and the retractable compression assembly can be changed to a detachable fixed connection state, and the unhinged first arc hinge plate 205 and the second arc hinge plate 304 are hinged by the corresponding hinge point adjustment mechanism 4, and then the previously hinged first arc hinge plate 205 and the second arc hinge plate 304 are separated, and the corresponding torque adjustment mechanism 5 is also connected to the second arc hinge plate in the separated state. The hinge plate 304 is disconnected, and then the separated first arc hinge plate 205 and the second arc hinge plate 304 are retracted through the corresponding telescopic adjustment mechanism 6. At this time, the height of the corresponding hinge rod 403 and the torque adjustment mechanism 5 can be lowered through the position adjustment component, so that the area previously in the hinged state is changed to an unobstructed area, which is convenient for the welding robot to pass through the initial hinge area without obstacles. Similarly, when the welding device hand approaches an hinge area, the corresponding hinge area is changed to an unobstructed area, and the corresponding unobstructed area is changed to the hinge area, and the corresponding torque adjustment mechanism 5 applies the same torque, so as to achieve the change of the hinge area under the premise of ensuring the stability of positioning and clamping.

[0033] Among them, Figure 2 , Figure 4 and Figure 5 As shown, the storage type support assembly includes a support base 201 detachably connected to the working platform 1, a lower arc-shaped storage member 202 fixedly connected to the support base 201, a plurality of lower connecting blocks 203 fixedly connected to the lower arc-shaped storage member 202, and a lower support block 204 detachably connected to the lower connecting block 203, and the interior of the lower arc-shaped storage member 202 is provided with two symmetrically distributed first arc-shaped storage grooves, and the other end of the first arc-shaped hinged plate 205 is slidably connected to the inner wall of the first arc-shaped storage groove.

[0034] The storage-type compression assembly includes an upper arc-shaped storage piece 301, a plurality of upper connecting blocks 302 fixedly connected to the upper arc-shaped storage piece 301, and an upper compression block 303 detachably connected to the upper connecting block 302. The interior of the upper arc-shaped storage piece 301 is provided with two symmetrically distributed second arc-shaped storage grooves, and the other end of the second arc-shaped hinged plate 304 is slidably connected to the inner wall of the second arc-shaped storage groove.

[0035] Positions close to the exits on the inner walls of the first arc-shaped receiving groove and the second receiving groove are both provided with limiting slots, and the limiting slots are matched with the limiting components.

[0036] It should be noted that before positioning and clamping the workpiece, the corresponding lower support block 204 and upper pressing block 303 are selected and replaced according to the specific design parameters of the workpiece, the first arc-shaped hinge plate 205 can slide in the first arc-shaped receiving groove of the lower arc-shaped receiving member 202, and the second arc-shaped hinge plate 304 can slide in the second arc-shaped receiving groove of the upper arc-shaped receiving member 301. When two adjacent first arc-shaped hinge plates 205 and second arc-shaped hinge plates 304 need to be hinged, the telescopic adjustment mechanism is used to adjust the first arc-shaped hinge plate 205 and the second arc-shaped hinge plate 304. Structure 6 controls the first arc hinge plate 205 and the second arc hinge plate 304 to pop out from the corresponding arc storage grooves. After popping out, the first arc hinge plate 205 and the second arc hinge plate 304 contact each other, the first hinge hole and the second hinge hole are in a coaxial state, and the limiting mechanism cooperates with the corresponding limiting slot to form a stable limiting connection, so that the first arc hinge plate 205 and the lower arc storage piece 202 and the second arc hinge plate 304 and the upper arc storage piece 301 form a stable whole.

[0037] Among them, Figure 2 As shown, the position adjustment component includes a first electric telescopic rod 401 fixedly connected to the support base 201 and a second electric telescopic rod 402 connected to the output end of the first electric telescopic rod 401. The first electric telescopic rod 401 is arranged perpendicular to the working platform 1, and the second electric telescopic rod 402 is arranged parallel to the working platform 1.

[0038] It should be noted that, as described above, when the first arc-shaped hinge plate 205 and the second arc-shaped hinge plate 304 are in contact, and the first hinge hole and the second hinge hole are in a coaxial state, the first electric telescopic rod 401 pushes the second electric telescopic rod 402 to move up until the hinge rod 403 moves to a position coaxial with the first hinge hole and the second hinge hole, and then the second electric telescopic rod 402 pushes the hinge rod 403 to be inserted into the first hinge hole and the second hinge hole in sequence, so that the first arc-shaped hinge plate 205 and the second arc-shaped hinge plate 304 are in a stably hinged state. Since the first arc-shaped hinge plate 205 is provided with a hinge groove matched with the second arc-shaped hinge plate 304, there is no need to additionally provide a limiting structure on the hinge rod 403 to limit the mutual deviation of the first arc-shaped hinge plate 205 and the second arc-shaped hinge plate 304. When the first arc-shaped hinge plate 205 and the second arc-shaped hinge plate 304 need to be separated, the second electric telescopic rod 402 is controlled to pull out the hinge rod 403.

[0039] Among them, Figure 2 As shown, the torque adjustment mechanism 5 includes an angle adjustment component connected to the housing of the second electric telescopic rod 402 and a torque applying component connected to the angle adjustment component. The angle adjustment component is used to adjust the rotation angle of the torque applying component, and the torque applying component is used to apply torque to the second arc-shaped hinge plate 304.

[0040] The angle adjustment assembly includes a connecting frame 501 connected to the outer shell of the second electric telescopic rod 402 and an adjustment motor 502 fixedly connected to the connecting frame 501, a torque application assembly is movably connected to the connecting frame 501, and an output shaft of the adjustment motor 502 is connected to the torque application assembly.

[0041] The torque application assembly includes a third electric telescopic rod 503, a fourth electric telescopic rod 504 connected to the output end of the third electric telescopic rod 503, and an insertion rod 505 connected to the output end of the fourth electric telescopic rod 504, the insertion rod 505 is matched with the socket 3040, the fourth electric telescopic rod 504 is parallel to the working platform 1, and the third electric telescopic rod 503 is movably connected to the connecting frame 501.

[0042] It should be noted that, as mentioned above, when the second arc-shaped hinged plate 304 is controlled to rotate around the hinged rod 403 by the torque adjustment mechanism 5, the third electric telescopic rod 503 is extended or shortened, and the fourth electric telescopic rod 504 and the insertion rod 505 are driven to move in the same direction and at the same distance. When extended, the second arc-shaped hinged plate 304 is driven to rotate toward the workpiece, and when shortened, the second arc-shaped hinged plate 304 can be driven to rotate in the opposite direction. Because it is movably connected to the connecting frame 501, it can adapt to the second arc-shaped hinged plate 304. The angle of the hinged plate 304 changes during the rotation process. When the first arc-shaped hinged plate 205 and the second arc-shaped hinged plate 304 need to be separated, the plug rod 505 is pulled out from the socket 3040 on the second arc-shaped hinged plate 304 by the fourth electric telescopic rod 504, so that the entire torque adjustment mechanism 5 is disconnected from the second arc-shaped hinged plate 304, and then the first electric telescopic rod 401 is moved downward to move the entire torque adjustment mechanism 5 downward, providing a moving path for the welding robot.

[0043] Among them, Figure 4 and Figure 5 As shown, the telescopic adjustment mechanism 6 includes a first electromagnet 601 and a first spring 602. The first electromagnet 601 is fixedly connected to the inner wall of the first arc-shaped receiving groove or the second arc-shaped receiving groove, and the first spring 602 is located between the first electromagnet 601 and the first arc-shaped hinge plate 205 or the second arc-shaped hinge plate 304.

[0044] It should be noted that, as mentioned above, when controlling the first arc-shaped hinge plate 205 and the second arc-shaped hinge plate 304 to pop out, the first electromagnet 601 is powered off and loses its magnetism. The first arc-shaped hinge plate 205 and the second arc-shaped hinge plate 304 can be made of magnetic metal. When the first electromagnet 601 loses its magnetism, there is no magnetic force to press the first spring 602. After the first spring 602 is reset, the first arc-shaped hinge plate 205 or the second arc-shaped hinge plate 304 can be popped out.

[0045] Among them, Figure 4 and Figure 5 As shown, the limit assembly includes an installation chamber arranged inside the first arc-shaped hinge plate 205 or the second arc-shaped hinge plate 304, a second electromagnet 701 fixedly connected to the inner wall of the installation chamber, a convex-shaped limit plug 703 slidably connected to the inner wall of the installation chamber, and a second spring 702 arranged between the second electromagnet 701 and the convex-shaped limit plug 703, and the convex-shaped limit plug 703 is matched with the limit slot.

[0046] It should be noted that, as described above, when the first arc hinge plate 205 and the second arc hinge plate 304 are ejected to the maximum arc length by the corresponding first spring 602, the convex-shaped limiting plug 703 in the limiting assembly moves to the limiting slot. At this time, the second electromagnet 701 can be powered off to lose its magnetism, thereby resetting the second spring 702, and the convex-shaped limiting plug 703 is ejected and inserted into the limiting slot, thereby forming a stable limiting connection. Similarly, when the first arc hinge plate 205 and the second arc hinge plate 304 need to be retracted, the second electromagnet 701 can be powered on again.

[0047] It should be noted that the arrangement of the wires and the control circuit are prior art and will not be described in detail here.

[0048] In one embodiment of the present invention, the first arc-shaped hinge plate 205 and the second arc-shaped hinge plate 304 can also be made of non-magnetic metal. It is only necessary to set the second electromagnet 701 to a state of mutual attraction with the first electromagnet 601. When the first arc-shaped hinge plate 205 and the second arc-shaped hinge plate 304 need to be popped out, the first electromagnet 601 and the second electromagnet 701 can be powered off at the same time. When the convex-shaped limit plug 703 moves to the corresponding limit slot, it can be popped out by the second spring 702 and inserted into the limit slot, thereby forming a stable limit connection state between the first arc-shaped hinge plate 205 and the upper arc-shaped storage component 301 and the second arc-shaped hinge plate 304 and the lower arc-shaped storage component 202.

[0049] The present embodiment is described above, but the present embodiment is not limited to the above-mentioned specific implementation manner. The above-mentioned specific implementation manner is merely illustrative and not restrictive. Under the guidance of the present embodiment, ordinary technicians in this field can also make many forms, which are all within the protection of the present embodiment.

Claims

1. A positioning mechanism for automobile parts processing and welding, characterized in that: It comprises a working platform (1), and a plurality of adjustable position-limiting clamping mechanisms detachably connected to the working platform (1), wherein the adjustable position-limiting clamping mechanisms are used to position-limit and clamp a workpiece; The adjustable position-limiting clamping mechanism comprises a lower support mechanism (2) detachably connected to the working platform (1), two hinge point adjustment mechanisms (4) symmetrically connected to the lower support mechanism (2), a torque adjustment mechanism (5) fixedly connected to the hinge point adjustment mechanism (4), and an upper pressing mechanism (3) arranged directly above the lower support mechanism (2), wherein the two ends of the lower support mechanism (2) and the two ends of the upper pressing mechanism (3) are respectively hinged via correspondingly arranged hinge point adjustment mechanisms (4); The lower support mechanism (2) comprises a retractable support assembly, two first arc-shaped hinged plates (205) slidably connected to the retractable support assembly, a hinge groove is provided on one end of the first arc-shaped hinged plate (205), a first hinge hole is provided on the side wall of the hinge groove, the two first arc-shaped hinged plates (205) are symmetrically arranged, the retractable support assembly is used to support the workpiece, the upper pressing mechanism (3) comprises a retractable pressing assembly, two second arc-shaped hinged plates (304) slidably connected to the retractable support assembly, a second hinge hole and a plug hole (3040) are provided on the second arc-shaped hinged plate (304), the second hinge hole is arranged in coordination with the first hinge hole, and the retractable pressing assembly is used to press the workpiece; The hinge point adjustment mechanism (4) comprises a position adjustment component and a hinge rod (403) connected to the output end of the position adjustment component, the position adjustment component is used to sequentially pass the hinge rod (403) through a first hinge hole and a second hinge hole in a coaxial state, and the torque adjustment mechanism (5) is used to drive the second arc-shaped hinge plate (304) to rotate around the hinge rod (403); The retractable support assembly and the retractable compression assembly are both provided with a telescopic adjustment mechanism (6), which is used to adjust the arc length of the first arc hinge plate (205) and the second arc hinge plate (304) to retract into the retractable support assembly and the retractable compression assembly respectively, and the other ends of the first arc hinge plate (205) and the second arc hinge plate (304) are both provided with a limit assembly, which is used to adjust the connection state between the first arc hinge plate (205) and the second arc hinge plate (304) and the retractable support assembly and the retractable compression assembly.

2. A positioning mechanism for automobile parts processing and welding according to claim 1, characterized in that: The storage-type support assembly comprises a support seat (201) detachably connected to the working platform (1), a lower arc-shaped storage member (202) fixedly connected to the support seat (201), a plurality of lower connecting blocks (203) fixedly connected to the lower arc-shaped storage member (202), and a lower support block (204) detachably connected to the lower connecting block (203), wherein two symmetrically distributed first arc-shaped storage grooves are provided inside the lower arc-shaped storage member (202), and the other end of the first arc-shaped hinged plate (205) is slidably connected to the inner wall of the first arc-shaped storage groove.

3. A positioning mechanism for automobile parts processing and welding according to claim 2, characterized in that: The storage type compression assembly comprises an upper arc-shaped storage piece (301), a plurality of upper connecting blocks (302) fixedly connected to the upper arc-shaped storage piece (301), and an upper compression block (303) detachably connected to the upper connecting block (302); two symmetrically distributed second arc-shaped storage grooves are provided inside the upper arc-shaped storage piece (301); the other end of the second arc-shaped hinge plate (304) is slidably connected to the inner wall of the second arc-shaped storage groove.

4. A positioning mechanism for automobile parts processing and welding according to claim 3, characterized in that: The inner walls of the first arc-shaped receiving groove and the second receiving groove are both provided with limiting slots at positions close to the exits, and the limiting slots are matched with the limiting components.

5. The positioning mechanism for automobile parts processing and welding according to claim 4, characterized in that: The position adjustment assembly comprises a first electric telescopic rod (401) fixedly connected to a support seat (201) and a second electric telescopic rod (402) connected to an output end of the first electric telescopic rod (401); the first electric telescopic rod (401) is arranged in a manner perpendicular to the working platform (1), and the second electric telescopic rod (402) is arranged in a manner parallel to the working platform (1).

6. A positioning mechanism for automobile parts processing and welding according to claim 5, characterized in that: The torque adjustment mechanism (5) comprises an angle adjustment component connected to the housing of the second electric telescopic rod (402) and a torque application component connected to the angle adjustment component, the angle adjustment component being used to adjust the rotation angle of the torque application component, and the torque application component being used to apply torque to the second arc-shaped hinged plate (304).

7. A positioning mechanism for automobile parts processing and welding according to claim 6, characterized in that: The angle adjustment assembly comprises a connecting frame (501) connected to the outer shell of the second electric telescopic rod (402) and an adjustment motor (502) fixedly connected to the connecting frame (501); the torque application assembly is movably connected to the connecting frame (501); and the output shaft of the adjustment motor (502) is connected to the torque application assembly.

8. The positioning mechanism for automobile parts processing and welding according to claim 7, characterized in that: The torque applying assembly comprises a third electric telescopic rod (503), a fourth electric telescopic rod (504) connected to the output end of the third electric telescopic rod (503), and an insertion rod (505) connected to the output end of the fourth electric telescopic rod (504), wherein the insertion rod (505) is matched with the insertion hole (3040), the fourth electric telescopic rod (504) is parallel to the working platform (1), and the third electric telescopic rod (503) is movably connected to the connecting frame (501).

9. A positioning mechanism for automobile parts processing and welding according to claim 8, characterized in that: The telescopic adjustment mechanism (6) comprises a first electromagnet (601) and a first spring (602); the first electromagnet (601) is fixedly connected to the inner wall of the first arc-shaped receiving groove or the second arc-shaped receiving groove; the first spring (602) is located between the first electromagnet (601) and the first arc-shaped hinge plate (205) or the second arc-shaped hinge plate (304).

10. A positioning mechanism for automobile parts processing and welding according to claim 9, characterized in that: The limiting assembly comprises an installation chamber arranged inside the first arc-shaped hinge plate (205) or the second arc-shaped hinge plate (304), a second electromagnet (701) fixedly connected to the inner wall of the installation chamber, a convex-shaped limiting plug (703) slidably connected to the inner wall of the installation chamber, and a second spring (702) arranged between the second electromagnet (701) and the convex-shaped limiting plug (703), wherein the convex-shaped limiting plug (703) is matched with the limiting slot.

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