A positioning mechanism for the processing and welding of automotive parts

Abstract

The present invention relates to the field of workpiece positioning, and discloses a positioning mechanism for machining and welding of automotive parts, which includes a working platform and a plurality of adjustable limit clamping mechanisms detachably connected to the working platform; the adjustable limit clamping mechanism includes a lower support mechanism detachably connected to the working platform, two symmetrically connected hinge point adjustment mechanisms on the lower support mechanism, a torque adjustment mechanism fixedly connected to the hinge point adjustment mechanism, and an upper pressing mechanism arranged directly above the lower support mechanism. The lower support mechanism and the upper pressing mechanism are hinged through the hinge point adjustment mechanism; the hinge point of the clamp-type fixture in the present invention can be automatically adjusted. On the premise of ensuring that the clamp-type fixture can stably clamp the workpiece, the position and opening / closing state of the hinge area of the clamp-type fixture are adjusted, so as to be able to adapt to the continuous welding process of the welding manipulator around the workpiece, and will not cause the welding manipulator to be blocked during the continuous circumferential movement, with low cost and high economic benefits.

Description

Technical Field

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

[0002] The body components of an automobile are mainly made by assembling and welding cold-rolled steel sheet stampings with good stamping and welding processability.

[0003] During the welding process, in order to improve the welding accuracy, it is necessary to use multiple fixtures to limit and clamp each component. The fixtures need to be designed according to the specific shape of the parts, but the pliers-type fixture is the most common. However, this pliers-type fixture needs to be fixedly installed on the workbench and is relatively close to the workpiece, which is not suitable for the welding scheme of circumferential continuous welding of the edges of parts. For the fixture with upper and lower extrusion and limitation, it is necessary to arrange a mobile gantry and a large number of limiting structures at a high altitude, and the cost of realizing automatic control is relatively high, which is not suitable for small and medium-sized manufacturers. Summary of the Invention

[0004] The purpose of the present invention is to provide a positioning mechanism for processing and welding automotive parts to solve the above problems.

[0005] The present invention provides a positioning mechanism for processing and welding automotive parts, including a workbench and a plurality of adjustable limit clamping mechanisms detachably connected to the workbench. The adjustable limit clamping mechanisms are used to limit and clamp workpieces.

[0006] The adjustable limit clamping mechanism includes a lower support mechanism detachably connected to the workbench, 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 directly above the lower support mechanism. 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 and two first arc-shaped hinge plates slidably connected to the retractable support assembly. One end of each first arc-shaped hinge plate is provided with a hinge groove, and the side wall of the hinge groove is provided with a first hinge hole. The two first arc-shaped hinge plates are symmetrically arranged. The retractable support assembly is used to support the workpiece. The upper pressing mechanism includes a retractable pressing assembly and two second arc-shaped hinge plates slidably connected to the retractable support assembly. The second arc-shaped hinge plates are provided with second hinge holes and jacks, and the second hinge holes are arranged in cooperation with the first hinge holes. 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 a first hinge hole and a second hinge hole in a coaxial state. The torque adjustment mechanism is used to drive the second arc-shaped hinge plate to rotate around the hinge rod;

[0009] Both the retractable support component and the retractable pressing component are provided with a telescopic adjustment mechanism. The telescopic adjustment mechanism is used to adjust the arc lengths of the first arc-shaped hinge plate and the second arc-shaped hinge plate respectively retracted into the retractable support component and the retractable pressing component. The other ends of the first arc-shaped hinge plate and the second arc-shaped hinge plate are both provided with a limiting component, and the limiting component is used to adjust the connection states of the first arc-shaped hinge plate and the second arc-shaped hinge plate with the retractable support component and the retractable pressing component.

[0010] As a further optimized solution of the present invention, the retractable support component includes a support base detachably connected to the working platform, a lower arc-shaped receiving member fixedly connected to the support base, a plurality of lower connection blocks fixedly connected to the lower arc-shaped receiving member, and a lower support block detachably connected to the lower connection block. Two symmetrically distributed first arc-shaped receiving grooves are provided inside the lower arc-shaped receiving member, and the other end of the first arc-shaped hinge plate is slidably connected to the inner wall of the first arc-shaped receiving groove.

[0011] As a further optimized solution of the present invention, the retractable pressing component includes an upper arc-shaped receiving member, a plurality of upper connection blocks fixedly connected to the upper arc-shaped receiving member, and an upper pressing block detachably connected to the upper connection block. Two symmetrically distributed second arc-shaped receiving grooves are provided inside the upper arc-shaped receiving member, and the other end of the second arc-shaped hinge plate is slidably connected to the inner wall of the second arc-shaped receiving groove.

[0012] As a further optimized solution of the present invention, limiting slots are provided at positions close to the outlets on the inner walls of the first arc-shaped receiving groove and the second receiving groove, and the limiting slots are arranged in a matching manner with the limiting component.

[0013] As a further optimized solution of the present invention, the position adjustment component includes a first electric telescopic rod fixedly connected to the support base 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 optimized solution of the present invention, the torque adjustment mechanism includes an angle adjustment component connected to the outer shell of the second electric telescopic rod and a torque application component connected to the angle adjustment component. The angle adjustment component is used to adjust the rotation angle of the torque application component, and the torque application component is used to apply torque to the second arc-shaped hinge plate.

[0015] As a further optimized solution of the present invention, the angle adjustment assembly includes a connecting frame connected to the housing of the second electric telescopic rod 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 optimized solution 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 a plug rod connected to the output end of the fourth electric telescopic rod. The plug rod is arranged to match the jack, 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 optimized solution 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 optimized solution of the present invention, the limiting component 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 limiting plug block slidably connected to the inner wall of the installation chamber, and a second spring arranged between the second electromagnet and the convex-shaped limiting plug block. The convex-shaped limiting plug block is arranged to match the limiting slot.

[0019] The beneficial effects of the present invention are as follows: The hinge points of the clamp-type fixture in the present invention can be automatically adjusted. On the premise of ensuring that the clamp-type fixture can stably clamp the workpiece, the position and opening / closing state of the hinge area of the clamp-type fixture are adjusted, so as to be able to adapt to the continuous welding process of the welding manipulator around the workpiece, and will not cause the welding manipulator to be blocked during the continuous circumferential movement. It has low cost and high economic benefits. Description of the Drawings

[0020] Figure 1 is the overall structural schematic diagram of the present invention;

[0021] Figure 2 is the present invention Figure 1 The enlarged view of part A in;

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

[0023] Figure 4 is the present invention Figure 3 The cross-sectional view taken along line B-B in;

[0024] Figure 5 is the present invention Figure 4 The enlarged view of part C in.

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

[0026] Now, the subject matter described herein will be discussed with reference to exemplary implementation modes. It should be understood that discussing these implementation modes is only to enable those skilled in the art to better understand and thus implement the subject matter described herein. Additionally, features described relative to some examples can also be combined in other examples.

[0027] As Figures 1 - 5 shown, a positioning mechanism for machining and welding of automotive parts includes a working platform 1 and a plurality of adjustable limit clamping mechanisms detachably connected to the working platform 1, and the adjustable limit clamping mechanisms are used for limiting and clamping workpieces;

[0028] The adjustable limit clamping mechanism includes a lower support mechanism 2 detachably connected to the working platform 1, two symmetrically connected hinge point adjusting mechanisms 4 on the lower support mechanism 2, a torque adjusting mechanism 5 fixedly connected to the hinge point adjusting mechanisms 4, and an upper pressing mechanism 3 disposed directly 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 correspondingly arranged hinge point adjusting mechanisms 4;

[0029] The lower support mechanism 2 includes a retractable support assembly and two first arc-shaped hinge plates 205 slidably connected to the retractable support assembly. One end of the first arc-shaped hinge plate 205 is provided with a hinge groove, and a first hinge hole is provided on the side wall of the hinge groove. The two first arc-shaped hinge plates 205 are symmetrically arranged. The retractable support assembly is used for supporting workpieces. The upper pressing mechanism 3 includes a retractable pressing assembly and two second arc-shaped hinge plates 304 slidably connected to the retractable support assembly. The second arc-shaped hinge plate 304 is provided with a second hinge hole and a jack 3040, and the second hinge hole is arranged in cooperation with the first hinge hole. The retractable pressing assembly is used for pressing workpieces;

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

[0031] The telescopic adjusting mechanism 6 is provided in both the retractable support component and the retractable pressing component. The telescopic adjusting mechanism 6 is used to adjust the arc lengths of the first arc-shaped hinge plate 205 and the second arc-shaped hinge plate 304 respectively retracted into the retractable support component and the retractable pressing component. Limit components are provided at the other ends of the first arc-shaped hinge plate 205 and the second arc-shaped hinge plate 304. The limit components are used to adjust the connection states of the first arc-shaped hinge plate 205 and the second arc-shaped hinge plate 304 with the retractable support component and the retractable pressing component.

[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 transportation robot or a manipulator. At this time, only a set of adjacent first arc-shaped hinge plates 205 and second arc-shaped hinge plates 304 are hinged through the correspondingly arranged hinge point adjustment mechanism 4, and the other set 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 the hinged state through the torque adjustment mechanism 5, so that the second arc-shaped hinge plate 304 rotates around the axis hinged to the first arc-shaped hinge plate 205, and the rotation direction is towards the workpiece. When the second arc-shaped hinge plate 304 rotates, it drives the retractable pressing assembly to rotate in the same direction and at the same angle until the retractable pressing assembly contacts the workpiece, and under the thrust provided by the torque adjustment mechanism 5, a set value of pressure is applied to the workpiece, so as to form a limit clamping mechanism with the corresponding retractable support assembly, thereby stably positioning and clamping the workpiece. When continuous welding is in progress, in order to facilitate the welding robot to directly pass through the hinged area between the first arc-shaped hinge plate 205 and the second arc-shaped hinge plate 304, the corresponding telescopic adjustment mechanism 6 can be controlled to eject the other set of unhinged first arc-shaped hinge plates 205 and second arc-shaped hinge plates 304 from the retractable support assembly and the retractable pressing assembly. After ejection, the first arc-shaped hinge plate 205 and the second arc-shaped hinge plate 304 are in contact with each other, and the first hinge hole and the second hinge hole are coaxial. At this time, the first arc-shaped hinge plate 205 and the retractable support assembly, as well as the second arc-shaped hinge plate 304 and the retractable pressing assembly, are all limited and clamped through the limit assembly, so that the sliding connection state between the first arc-shaped hinge plate 205 and the retractable support assembly, as well as the second arc-shaped hinge plate 304 and the retractable pressing assembly, can be changed to a detachable fixed connection state. Then, the unhinged first arc-shaped hinge plate 205 and the second arc-shaped hinge plate 304 are hinged through the corresponding hinge point adjustment mechanism 4, and then the previously hinged first arc-shaped hinge plate 205 and the second arc-shaped hinge plate 304 are separated. The corresponding torque adjustment mechanism 5 is also disconnected from the second arc-shaped hinge plate 304 in the separated state. Then, the separated first arc-shaped hinge plate 205 and the second arc-shaped 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 reduced through the position adjustment assembly, so that the previously hinged area is changed to an unobstructed area, facilitating the welding manipulator to pass through the initial hinged area without obstruction. Similarly, when the welding manipulator approaches a hinged area, the corresponding hinged area is changed to an unobstructed area, and the corresponding unobstructed area is changed to a hinged area, and it is ensured that the corresponding torque adjustment mechanism 5 applies the same torque, so as to achieve the change of the hinged area on the premise of ensuring the stability of positioning and clamping.

[0033] Among them, such asFigure 2 , Figure 4 and Figure 5 As shown in Figure 2 , Figure 4 and Figure 5 , the retractable support assembly includes a support base 201 detachably connected to the work platform 1, a lower arc-shaped retractable member 202 fixedly connected to the support base 201, several lower connecting blocks 203 fixedly connected to the lower arc-shaped retractable member 202, and a lower support block 204 detachably connected to the lower connecting blocks 203. There are two symmetrically distributed first arc-shaped retractable grooves inside the lower arc-shaped retractable member 202, and the other end of the first arc-shaped hinge plate 205 is slidably connected to the inner wall of the first arc-shaped retractable groove.

[0034] The retractable pressing assembly includes an upper arc-shaped retractable member 301, several upper connecting blocks 302 fixedly connected to the upper arc-shaped retractable member 301, and an upper pressing block 303 detachably connected to the upper connecting blocks 302. There are two symmetrically distributed second arc-shaped retractable grooves inside the upper arc-shaped retractable member 301, and the other end of the second arc-shaped hinge plate 304 is slidably connected to the inner wall of the second arc-shaped retractable groove.

[0035] Limit slots are provided at positions close to the exits on the inner walls of the first arc-shaped retractable groove and the second retractable groove, and the limit slots are arranged to match the limit 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 retractable groove of the lower arc-shaped retractable member 202, and the second arc-shaped hinge plate 304 can slide in the second arc-shaped retractable groove of the upper arc-shaped retractable 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 6 is used to control the first arc-shaped hinge plate 205 and the second arc-shaped hinge plate 304 to pop out from the corresponding arc-shaped retractable grooves. After popping out, the first arc-shaped hinge plate 205 and the second arc-shaped hinge plate 304 are in contact with 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-shaped hinge plate 205 and the lower arc-shaped retractable member 202, and the second arc-shaped hinge plate 304 and the upper arc-shaped retractable member 301 form a stable whole.

[0037] Among them, as Figure 2 shown, the position adjustment assembly 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 work platform 1, and the second electric telescopic rod 402 is arranged parallel to the work 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 second electric telescopic rod 402 is pushed upward by the first electric telescopic rod 401 until the hinge rod 403 moves to a position coaxial with the first hinge hole and the second hinge hole. Then, the hinge rod 403 is pushed by the second electric telescopic rod 402 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 stable hinged state. Since the first arc-shaped hinge plate 205 is provided with a hinge groove that cooperates 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 relative offset 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, as Figure 2 shown, the torque adjustment mechanism 5 includes an angle adjustment component connected to the outer shell of the second electric telescopic rod 402 and a torque application component connected to the angle adjustment component. The angle adjustment component is used to adjust the rotation angle of the torque application component, and the torque application component is used to apply torque to the second arc-shaped hinge plate 304.

[0040] The angle adjustment component 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. The torque application component is movably connected to the connecting frame 501, and the output shaft of the adjustment motor 502 is connected to the torque application component.

[0041] The torque application component 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 a plug rod 505 connected to the output end of the fourth electric telescopic rod 504. The plug rod 505 is matched with the jack 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 described above, when the second arc-shaped hinge plate 304 is controlled to rotate around the hinge rod 403 by the torque adjustment mechanism 5, the third electric telescopic rod 503 extends or retracts, and drives the fourth electric telescopic rod 504 and the insertion rod 505 to move in the same direction and at the same distance. When extending, it drives the second arc-shaped hinge plate 304 to rotate towards the workpiece. When shortening, it can drive the second arc-shaped hinge plate 304 to rotate in the opposite direction. Since it is movably connected to the connecting frame 501, it can adapt to the angular change during the rotation process of 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 insertion rod 505 is pulled out of the insertion hole 3040 on the second arc-shaped hinge plate 304 by the fourth electric telescopic rod 504, so that the entire torque adjustment mechanism 5 is disengaged from the second arc-shaped hinge plate 304. Then, the entire torque adjustment mechanism 5 is lowered by the first electric telescopic rod 401 to provide a moving path for the welding manipulator.

[0043] Among them, as Figure 4 and Figure 5 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. 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 described 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, thus losing 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 resets, it can pop out the first arc-shaped hinge plate 205 or the second arc-shaped hinge plate 304.

[0045] Among them, as Figure 4 and Figure 5 shown, the limiting component includes an installation chamber provided 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 insertion block 703 slidably connected to the inner wall of the installation chamber, and a second spring 702 provided between the second electromagnet 701 and the convex-shaped limiting insertion block 703. The convex-shaped limiting insertion block 703 is arranged to match the limiting slot.

[0046] 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 ejected by the corresponding first spring 602 to the maximum arc length, the convex-shaped limit insertion block 703 in the limit assembly moves to the limit slot at this time. At this time, the second electromagnet 701 can be powered off to lose its magnetism, so that the second spring 702 resets, and the convex-shaped limit insertion block 703 is ejected and inserted into the limit slot, thereby forming a stable limit connection. Similarly, when it is necessary to retract the first arc-shaped hinge plate 205 and the second arc-shaped hinge plate 304, 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 both prior arts and will not be elaborated here.

[0048] In an 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 only needs to set the second electromagnet 701 to be in a state of attracting the first electromagnet 601. When it is necessary to eject the first arc-shaped hinge plate 205 and the second arc-shaped hinge plate 304, the first electromagnet 601 and the second electromagnet 701 can be powered off at the same time. When the convex-shaped limit insertion block 703 moves to the corresponding limit slot, it can be ejected by the second spring 702 and inserted into the limit slot, so as to form a stable limit connection state between the first arc-shaped hinge plate 205 and the upper arc-shaped receiving member 301, and between the second arc-shaped hinge plate 304 and the lower arc-shaped receiving member 202.

[0049] The above describes this embodiment, but this embodiment is not limited to the above specific implementation manners. The above specific implementation manners are only illustrative and not restrictive. Under the inspiration of this embodiment, those of ordinary skill in the art can also make many forms, all of which fall within the protection scope of this 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 limit clamping mechanisms detachably connected to the working platform (1), wherein the adjustable limit clamping mechanisms are used to limit and clamp a workpiece; 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 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 component, two first arc-shaped hinged plates (205) slidably connected to the retractable support component, 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 component is used to support the workpiece, the upper pressing mechanism (3) comprises a retractable pressing component, two second arc-shaped hinged plates (304) slidably connected to the retractable support component, 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 component 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-shaped hinge plate (205) and the second arc-shaped hinge plate (304) to be retracted into the retractable support assembly and the retractable compression assembly respectively, and the other ends of the first arc-shaped hinge plate (205) and the second arc-shaped hinge plate (304) are both provided with a limit assembly, which is used to adjust the connection state between the first arc-shaped hinge plate (205) and the second arc-shaped hinge plate (304) and the retractable support assembly and the retractable compression assembly; 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; 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.

2. A positioning mechanism for automobile parts processing and welding according to claim 1, 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.

3. The positioning mechanism for automobile parts processing and welding according to claim 1, 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).

4. The positioning mechanism for automobile parts processing and welding according to claim 1, 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).

5. The positioning mechanism for automobile parts processing and welding according to claim 4, characterized in that: The angle adjustment component 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 component is movably connected to the connecting frame (501); and the output shaft of the adjustment motor (502) is connected to the torque application component.

6. A positioning mechanism for automobile parts processing and welding according to claim 5, characterized in that: The torque application 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), the insertion rod (505) being arranged to match the insertion hole (3040), the fourth electric telescopic rod (504) being parallel to the working platform (1), and the third electric telescopic rod (503) being movably connected to the connecting frame (501).

7. The positioning mechanism for automobile parts processing and welding according to claim 1, 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; 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).

8. The positioning mechanism for automobile parts processing and welding according to claim 1, characterized in that: The limit 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 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), wherein the convex-shaped limit plug (703) is matched with the limit slot.

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