Positioning and clamping tool for automobile welding

Abstract

The utility model relates to a positioning and clamping tool for automobile welding, which comprises a workbench capable of movably positioning a placement position, and a first limiting piece and a second limiting piece which are used for clamping two workpieces to be welded and assembled respectively are supported on the workbench in a partitioned manner. The first limiting piece is installed on a lifting deflection mechanism which drives the first limiting piece to deflect so as to change the included angle between the first limiting piece and the horizontal plane, and the lifting deflection mechanism is installed on the workbench through a transverse moving mechanism which can drive the lifting deflection mechanism to transversely move so as to change the distance between the first limiting piece and the second limiting piece. The second limiting piece is installed on an arc deflection mechanism capable of driving the second limiting piece to conduct arc deflection, and the arc deflection mechanism is supported on the workbench through a rotary supporting mechanism. According to the utility model, the relative splicing position and the jointly-limited splicing angle between the two accessories to be welded can be adjusted according to requirements, so that the welding auxiliary positioning of the special-shaped accessories with various shapes and outlines can be adaptively carried out.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile welding processing equipment, especially relates to a positioning and clamping tool for automobile welding. BACKGROUND

[0002] With the continuous development of automobile technology, the integration of automobiles is getting higher and higher, and the production of automobiles is also increasing, which makes the number of special-shaped parts used in automobile production gradually increase. In the traditional technology, in order to obtain special-shaped parts, two or more unit parts are usually spliced manually, and then the splicing position is welded by using a welding device, so as to obtain special-shaped parts. The traditional manual assembly and welding cannot meet the high-precision requirements of the shape and size of the parts, and the frequent assembly operation and the frequent adjustment of the splicing angle and position lead to low welding efficiency, and the appearance of the welded parts depends too much on manual work, increasing the work burden of the workers. Therefore, the prior art usually sets up an auxiliary positioning tool to improve the accuracy, convenience and stability of welding positioning, so as to replace manual positioning to assist the welding of special-shaped parts by a welding robot.

[0003] However, the existing auxiliary positioning tool for welding can only limit the relative position relationship of two parts to be assembled of a single type, cannot controllably adjust the relative splicing position and the assembly angle commonly defined according to the welding requirements and the part shape requirements, cannot meet the welding production requirements of special-shaped parts of different profiles, reduces the practicality and flexibility of the tool, makes the application range of the tool small and unable to effectively cope with the continuously changing welding production requirements, and leads to low overall welding processing efficiency. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a positioning and clamping tool for automobile welding, which can adjust the relative splicing position and the assembly angle commonly defined between two parts to be welded according to requirements, and adaptively perform the welding auxiliary positioning of special-shaped parts of various profiles, so as to solve the problem that the existing auxiliary positioning tool for welding cannot adjustably change the splicing position and the splicing angle of the parts, cannot be applied to special-shaped parts of various profiles, can only be used for special purposes, reduces the application range and practicality of the positioning tool, and cannot effectively meet the increasingly complex and diverse welding processing requirements.

[0005] The utility model discloses a positioning and clamping tool for automobile welding, which comprises a workbench that is positioned and arranged movably, and first and second limiters that can clamp two workpieces to be welded and assembled respectively are supported on the workbench, wherein the first limiter is installed on a lifting and deflecting mechanism that can drive the first limiter to deflect and change the included angle between the first limiter and the horizontal plane, and the lifting and deflecting mechanism is installed on the workbench through a horizontal shifting mechanism that can drive the first and second limiters to horizontally shift and change the distance between the first and second limiters; the second limiter is installed on a circular arc deflecting mechanism that can drive the second limiter to deflect along an arc, and the circular arc deflecting mechanism is supported on the workbench through a rotary supporting mechanism.

[0006] According to a preferred embodiment, the circular arc deflecting mechanism comprises a semicircular arc track, a sliding plate, an outer toothed arc strip, a meshing gear and a deflecting drive motor, wherein the sliding plate is slidably connected to the semicircular arc track, the outer toothed arc strip is arranged on the radially outer arc surface of the semicircular arc track, the deflecting drive motor is installed on the sliding plate, and the deflecting drive motor is meshed with the outer toothed arc strip through the meshing gear sleeved on the rotating output shaft of the deflecting drive motor.

[0007] According to a preferred embodiment, the side surface of the semicircular arc track is provided with an arc-shaped track groove, and the two ends of the arc-shaped track groove are detachably provided with blocking plates.

[0008] According to a preferred embodiment, the plate body surface of the sliding plate facing the arc-shaped track groove is connected with a rolling bearing slidably clamped in the arc-shaped track groove through a supporting column; the second limiter is also installed on the surface of the sliding plate.

[0009] According to a preferred embodiment, the lifting and deflecting mechanism comprises a stepped bottom plate, a deflecting mounting plate, a rotating shaft and an extension rod, wherein the top side edge of the stepped bottom plate is rotationally connected with the bottom surface of the deflecting mounting plate through the rotating shaft; the extension rod is also hingedly connected to the lower surface of the deflecting mounting plate on the side of the top surface of the stepped bottom plate away from the rotating shaft, and the side of the extension rod away from the stepped bottom plate is hingedly connected to the lower surface of the deflecting mounting plate.

[0010] According to a preferred embodiment, the first limiter is installed on the upper surface of the deflecting mounting plate; the first limiter comprises a U-shaped clamp body installed on the deflecting mounting plate in a side-lying manner and an adjusting screw rod penetrating through the U-shaped clamp body, and the rod body end of the adjusting screw rod is rotationally connected with a limiting pressing plate in the U-shaped clamp body.

[0011] According to a preferred embodiment, the guide groove body of the transverse moving mechanism is embedded on the workbench, a transmission screw is rotatably arranged in the groove cavity of the guide groove body, and a slider is sleeved on the transmission screw and is limited in the movable direction by the guide groove body; one end of the transmission screw is in transmission connection with a transverse moving driving motor through the end surface of the guide groove body; a lifting support column supporting the step bottom plate is arranged on the end surface of the slider extending to the outside of the guide groove body.

[0012] According to a preferred embodiment, the rotating support mechanism comprises a lifting table supported on the workbench, a steering motor mounted on the lifting table, and a connecting sleeve connected to the rotating output end of the steering motor.

[0013] According to a preferred embodiment, one end of the semicircular arc track is provided with a plug-in square column, and the plug-in square column is detachably inserted into the connecting sleeve.

[0014] According to a preferred embodiment, a movable locking universal wheel is arranged at the bottom of the table body of the workbench.

[0015] The beneficial effects of the utility model are as follows:

[0016] The lifting deflection mechanism can drive the deflection of the first limiting piece according to requirements, so as to effectively adjust the inclination angle of the accessory clamped by the first limiting piece, so that the included angle of the two accessories to be welded can be adjusted to a specific angle according to requirements, and then a special-shaped accessory with different included angle profiles is constructed with high adaptability. The horizontal moving mechanism can drive the lifting deflection mechanism to move horizontally and adjust the vertical height according to requirements, so as to realize the position adjustment of the first limiting piece and the accessory clamped thereby in a rectangular plane coordinate system. The circular arc deflection mechanism can drive the second limiting piece to deflect to change the inclination angle of the accessory clamped thereby, and the circular arc deflection mechanism and the second limiting piece can be lifted and rotated around the vertical shaft under the driving of the rotating support mechanism, so as to realize the position adjustment of the second limiting piece in a three-dimensional coordinate system relative to the first limiting piece, so that the accessory clamped thereby can rotate, lift and deflect more complexly and variously, so that the accessory clamped by the first limiting piece and the accessory clamped by the second limiting piece can be connected in multiple positions and assembled at multiple angles, so as to adjustably and reconfigurably define multiple splicing forms of special-shaped accessories, so as to facilitate the external mechanical hand to accurately weld the splicing position to construct multiple special-shaped accessories with different shape profiles, so that the tool can controllably adjust the relative splicing position and the splicing angle commonly defined according to welding requirements and accessory shape requirements, meet the welding production requirements of special-shaped accessories with different profiles, improve the practicality and flexibility of the tool, and expand the application range of the tool, so as to effectively meet the continuously changing welding production requirements and improve the overall welding efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a preferred structure schematic view of the positioning and clamping tool for automobile welding provided by the utility model;

[0018] Figure 2 is a preferred structure schematic view of the circular arc deflection mechanism of the positioning and clamping tool for automobile welding provided by the utility model;

[0019] Figure 3 is a partial sectional view of the semicircular arc track of the positioning and clamping tool for automobile welding provided by the utility model.

[0020] LIST OF REFERENCE NUMERALS

[0021] 1: workbench; 2: first limiter; 3: lifting and deflecting mechanism; 4: transverse movement mechanism; 5: circular arc deflection mechanism; 6: rotating support mechanism; 7: second limiter; 11: universal wheel with lock; 21: U-shaped clamp; 22: adjusting screw; 23: limit pressure plate; 31: step bottom plate; 32: deflection mounting plate; 33: rotating shaft; 34: telescopic rod; 41: guide groove body; 42: transmission screw; 43: slider; 44: transverse movement drive motor; 45: lifting support column; 51: semicircular arc track; 52: slide plate; 53: external gear arc strip; 54: meshing gear; 55: deflection drive motor; 61: lifting platform; 62: steering motor; 63: connecting sleeve; 511: arc track groove; 512: sealing plate; 513: plug-in square column; 521: support column; 522: rolling bearing; 523: universal ball. DETAILED DESCRIPTION

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be briefly introduced below in combination with the drawings and the descriptions of the embodiments or the prior art. Obviously, the following descriptions of the structures of the drawings are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] The following will describe in detail the technical solutions provided by the present invention by way of examples with reference to the accompanying drawings. It should be noted that the description of these examples is intended to facilitate understanding of the present invention and does not constitute a limitation of the present invention. In some cases, some implementations are not described or are not described in detail because they belong to existing or conventional technologies.

[0024] In addition, the technical features described herein, or the steps of all methods or processes disclosed herein, except for mutually exclusive features and / or steps, can also be combined in any suitable manner in one or more embodiments. For those skilled in the art, it is easy to understand that the order of steps or operations of the methods related to the embodiments provided herein can also be changed. Any order in the drawings and embodiments is for illustrative purposes only and does not imply a requirement to follow a certain order unless it is explicitly stated that a certain order is required.

[0025] The serial numbers assigned to components herein, such as "first" and "second," are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" in this application, where reasonable (and not self-contradictory), include both direct and indirect connections (couplings).

[0026] The following is a detailed description with reference to the accompanying drawings.

[0027] Example 1

[0028] The present application provides a positioning and clamping tool for automobile welding, which includes a workbench 1, a first limiter 2, a lifting and deflecting mechanism 3, a transverse movement mechanism 4, an arc deflection mechanism 5, a rotating support mechanism 6 and a second limiter 7.

[0029] according to Figure 1-3 A specific embodiment is shown, in which the workbench 1 is movably positioned in different areas. The workbench 1 is supported in partitions with a first limit member 2 and a second limit member 7, which can respectively clamp two workpieces to be welded and assembled. The first limit member 2 is mounted on a lifting and deflecting mechanism 3 that can drive it to deflect and change the angle between it and the horizontal plane. The lifting and deflecting mechanism 3 is mounted on the workbench 1 through a transverse movement mechanism 4 that can drive it to move laterally and change the distance between the first limit member 2 and the second limit member 7. The second limit member 7 is mounted on an arc deflection mechanism 5 that can drive it to deflect in an arc, and the arc deflection mechanism 5 is supported on the workbench 1 by a rotating support mechanism 6. Preferably, the arc deflection described in the present application refers to a deflection movement around the center position of a circle and along an arc line at one end of the center of the circle. The lifting and deflecting mechanism 3 provided in this application can drive the deflection of the first stopper 2 as needed, thereby effectively adjusting the tilt angle of the accessory clamped by the first stopper 2, so that the angle between the two accessories to be welded can be adjusted to a specific angle as needed, thereby highly adaptably constructing special-shaped accessories with different angle profiles. The transverse movement mechanism 4 provided in this application can drive the lifting and deflecting mechanism 3 to perform translational movement and vertical height adjustment as needed, thereby achieving position adjustment of the first stopper 2 and the accessory it clamps in a rectangular plane coordinate system. The circular arc deflection mechanism 5 provided in the present application can drive the second limiting member 7 to deflect and change the inclination angle of the clamped accessory, and the circular arc deflection mechanism 5 and the second limiting member 7 can be lifted and lowered and rotated around the vertical axis under the drive of the rotating support mechanism 6, thereby realizing the position adjustment of the second limiting member 7 in a three-dimensional coordinate system relative to the first limiting member 2, so that it can clamp the accessory to undergo more complex and diverse rotations, liftings and deflections, so that the accessory clamped by the first limiting member 2 and the accessory clamped by the second limiting member 7 can be connected in multiple positions and assembled at multiple angles, so that The splicing forms of various special-shaped accessories can be adjusted and reconfigured, so that the external manipulator can accurately perform welding processing on the splicing positions to construct various special-shaped accessories with different shapes and contours, so that the tooling can controllably adjust the relative splicing positions and the jointly defined splicing angles according to the welding requirements and the accessory appearance requirements, meet the welding production requirements of special-shaped accessories with different contours, improve the practicality and flexibility of the tooling, expand the scope of application of the tooling, thereby effectively meeting the continuously changing welding production needs and improving the efficiency of the overall welding process.

[0030] Preferably, a locking universal wheel 11 is arranged at the bottom of the table body of the workbench 1, which can facilitate movement. The locking universal wheel is arranged to improve the positioning adjustability and mobility of the workbench 1, so as to facilitate placement and work in different work areas.

[0031] Preferably, the first limiting member 2 comprises a U-shaped clamp body 21 horizontally arranged on the deflection mounting plate 32 and an adjusting screw 22 threaded through the U-shaped clamp body 21. Further preferably, the rod end of the adjusting screw 22 is rotationally connected to a limiting pressing plate 23 in the U-shaped clamp body 21. Preferably, the surface of the limiting pressing plate 23 is provided with an anti-skid wear-resistant surface layer. Preferably, the U-shaped clamp body 21 of the first limiting member 2 is horizontally arranged on the upper surface of the deflection mounting plate 32 with the open end facing the circular arc deflection mechanism 5. Specifically, the connection mode can be adhesion, welding or bolt connection, etc. Preferably, the second limiting member 7 has a similar structure, which will not be described one by one here. The adjusting screw 22 is threaded through the side of the U-shaped clamp body 21 away from the deflection mounting plate 32, so as to change the length of the adjusting screw 22 inserted into the inner cavity of the U-shaped clamp body 21 by rotating, so that the limiting pressing plate 23 can cooperate with the U-shaped clamp body 21 to limit and clamp the workpiece to be welded partially inserted into the U-shaped clamp body 21. The U-shaped clamp body 21 can follow the deflection movement of the deflection mounting plate 32, so as to adjust the assembly angle between the workpiece clamped by the first limiting member 2 and the workpiece clamped by the second limiting member 7, so as to adjustably construct the assembly mode of the special-shaped workpiece with different external profiles.

[0032] Preferably, the lifting and deflection mechanism 3 comprises a stepped base plate 31, a deflection mounting plate 32, a rotating shaft 33 and an extension rod 34. Preferably, the top side edge of the stepped base plate 31 is rotationally connected to the bottom surface of the deflection mounting plate 32 through the rotating shaft 33, so that the deflection mounting plate 32 can be adjusted to deflect around the connection position of the rotating shaft 33 to change the inclination angle of the plate surface. Preferably, the extension rod 34 is hinged to the lower surface of the deflection mounting plate 32 on the side of the top surface of the stepped base plate 31 away from the rotating shaft 33. Further preferably, the side of the extension rod 34 away from the stepped base plate 31 is hinged to the lower surface of the deflection mounting plate 32, so as to change the inclination angle of the deflection mounting plate 32 by adjusting the length of the rod body. The deflection mounting plate 32 can be adjusted to rotate around the rotating shaft 33 under the adjustment of the extension rod 34, so that the plate body rotates clockwise or counterclockwise to change the inclination angle of the plate surface, thereby adjusting the inclination angle of the first limiting member 2.

[0033] Preferably, the horizontal moving mechanism 4 comprises a guide groove body 41, a transmission screw 42, a sliding block 43, a horizontal moving drive motor 44 and a lifting support column 45. Preferably, the guide groove body 41 is embedded on the workbench 1. Preferably, the transmission screw 42 is rotatably arranged in the groove cavity of the guide groove body 41. Further preferably, the sliding block 43 is sleeved on the transmission screw 42 and the movement direction of the sliding block 43 is defined by the guide groove body 41. Preferably, one end of the transmission screw 42 penetrates through the end face of the guide groove body 41 and is in transmission connection with the horizontal moving drive motor 44. Preferably, the lifting support column 45 supporting the step bottom plate 31 is arranged on the end face of the sliding block 43 extending out of the guide groove body 41. The horizontal moving drive motor 44 provided in the application can drive the transmission screw 42 to rotate, so that the sliding block 43 threadedly sleeved on the rod body of the transmission screw 42 can move horizontally along the slotting direction of the guide groove body 41, thereby driving the lifting and deflecting mechanism 3 to move horizontally synchronously and changing the distance between the lifting and deflecting mechanism 3 and the circular arc deflecting mechanism 5, so that the distance between the fittings clamped by the first limiting part 2 and the second limiting part 7 is changed, thereby the tool can be used for clamping and limiting and butt joint assembling of fittings of different sizes.

[0034] Preferably, the circular arc deflecting mechanism 5 comprises a semicircular arc track 51, a sliding plate 52, an outer toothed arc strip 53, a meshing gear 54 and a deflecting drive motor 55. Preferably, the sliding plate 52 is slidably arranged on the semicircular arc track 51. Further preferably, the outer toothed arc strip 53 is arranged on the radially outer side arc face of the semicircular arc track 51. Preferably, the deflecting drive motor 55 is installed on the sliding plate 52. Further preferably, the deflecting drive motor 55 is in meshing connection with the outer toothed arc strip 53 through the meshing gear 54 sleeved on the rotating output shaft of the deflecting drive motor 55. Specifically, when the deflecting drive motor 55 drives the meshing gear 54 to rotate, the meshing gear 54 rolls along the arc line direction defined by the outer toothed arc strip 53 in the state of being in meshing connection with the outer toothed arc strip 53, thereby driving the deflecting drive motor 55 and the sliding plate 52 to move horizontally synchronously, so that the sliding plate 52 can deflect along the arc line defined by the semicircular arc track 51. The sliding plate 52 provided in the application can deflect along the semicircular arc track 51 under the cooperation and driving of the outer toothed arc strip 53, the meshing gear 54 and the deflecting drive motor 55, thereby enabling the second limiting part 7 connected thereto to deflect synchronously, so that the relative position between the first limiting part 2 and the second limiting part 7 is changed, so that the relative edge abutting position and the relative butt joint angle of the fittings clamped by the two limiting parts can be adjusted according to the requirement, thereby facilitating the welding processing of fittings of various shapes and angles, so as to improve the practicability and flexible adjustability of the tool and improve the applicable range.

[0035] Preferably, the side surface of the semicircular arc track 51 is provided with an arc-shaped track groove 511. Further preferably, the two ends of the arc-shaped track groove 511 are detachably provided with blocking plates 512. Preferably, one end of the semicircular arc track 51 is provided with a plug-in square column 513. Preferably, the plate body surface of the sliding plate 52 facing the arc-shaped track groove 511 is connected with a rolling bearing 522 slidingly clamped in the arc-shaped track groove 511 through a support column 521, so as to limit the relative connection state between the sliding plate 52 and the semicircular arc track 51. Preferably, the plate body surface of the sliding plate 52 facing the arc-shaped track groove 511 is also embedded with universal ball bearings 523 abutting against the side surface of the semicircular arc track 51. Specifically, the second limiting piece 7 is also installed on the surface of the sliding plate 52, so as to drive the second limiting piece 7 to synchronously deviate in an arc line, thereby changing the relative position relationship between the first limiting piece 2 and the second limiting piece 7, and further changing the relative splicing position and splicing angle between the two workpieces clamped by the two limiting pieces according to requirements.

[0036] Preferably, the rotating support mechanism 6 comprises a lifting platform 61 supported on the workbench 1, a steering motor 62 installed on the lifting platform 61, and a connecting sleeve 63 connected to the rotating output end of the steering motor 62. Preferably, the plug-in square column 513 is detachably inserted in the connecting sleeve 63. Preferably, locking screws 631 are threaded on the side wall of the connecting sleeve 63, so as to limit the position of the plug-in square column 513 in the sleeve cavity thereof. The lifting platform 61 provided in the present application can adjust the support height of the circular arc deflection mechanism 5 according to requirements, so as to change the relative height between the first limiting piece 2 and the second limiting piece 7, thereby more effectively and comprehensively adjusting the relative position relationship between the two workpieces to be welded. The steering motor 62 provided in the present application can also drive the circular arc deflection mechanism 5 to vertically deflect, so as to complete the multi-directional work position adjustment of the second limiting piece 7 in three-dimensional coordinates, so that the second limiting piece 7 can position the relative coordinates thereof with respect to the first limiting piece 2 in a more abundant angle range and relative position relationship, thereby being capable of assembling special-shaped workpieces with more complex and various butt joint angles and splicing shapes.

[0037] The utility model is not limited to the above optional implementation, anyone can derive other various forms of product under the enlightenment of the utility model, but no matter make any change in its shape or structure, any technical scheme falling within the scope defined by the claims of the utility model falls within the protection scope of the utility model. Those skilled in the art should understand that the utility model specification and its drawings are illustrative and not constitute the limitation of the claims. The protection scope of the utility model is defined by the claims and its equivalents. In the full text, the features guided by "preferably" are only optional ways and should not be understood as necessarily setting, therefore the applicant reserves the right to abandon or delete the relevant preferred features at any time.

Claims

1. A positioning and clamping tool for automobile welding, comprising a workbench (1) that can be movably positioned at a placement position, characterized in that: A first limiting member (2) and a second limiting member (7) capable of respectively clamping two workpieces to be welded and assembled are supported in partitions on the workbench (1), wherein: The first position-limiting member (2) is mounted on a lifting and deflecting mechanism (3) capable of driving the first position-limiting member to deflect and thus change the angle between the first position-limiting member (2) and the horizontal plane, and the lifting and deflecting mechanism (3) is mounted on the workbench (1) via a transverse movement mechanism (4) capable of driving the first position-limiting member (2) to move laterally and thus change the distance between the first position-limiting member (2) and the second position-limiting member (7); The second position-limiting member (7) is mounted on an arc deflection mechanism (5) capable of driving the second position-limiting member to deflect an arc, and the arc deflection mechanism (5) is supported on the workbench (1) via a rotation support mechanism (6).

2. The positioning and clamping tool for automobile welding according to claim 1, characterized in that: The circular arc deflection mechanism (5) comprises a semicircular arc track (51), a slide plate (52), an outer tooth arc strip (53), a meshing gear (54) and a deflection drive motor (55), wherein: The slide plate (52) is slidably connected to the semicircular track (51). The outer tooth arc strip (53) is laid on the radial outer arc surface of the semicircular arc track (51). The deflection drive motor (55) is mounted on the slide plate (52), and the deflection drive motor (55) is meshed with the outer tooth arc strip (53) via the meshing gear (54) sleeved on the rotation output shaft thereof.

3. The positioning and clamping tool for automobile welding according to claim 2, characterized in that: An arc-shaped track groove (511) is provided on the side surface of the semicircular track (51), and sealing plates (512) are detachably provided at both ends of the arc-shaped track groove (511).

4. The positioning and clamping tool for automobile welding according to claim 3, characterized in that: The skateboard (52) The surface of the plate body facing the arc-shaped rail groove (511) is connected to a rolling bearing (522) slidably mounted in the arc-shaped rail groove (511) via a support column (521); The second limiting member (7) is also installed on the surface of the slide plate (52).

5. The positioning and clamping tool for automobile welding according to claim 4, characterized in that: The lifting and deflecting mechanism (3) comprises a stepped bottom plate (31), a deflection mounting plate (32), a rotating shaft (33) and a telescopic rod (34), wherein: The top side edge of the step bottom plate (31) is rotatably connected to the bottom surface of the deflection mounting plate (32) via the rotation shaft (33); The telescopic rod (34) is also hinged on the side of the top surface of the step bottom plate (31) away from the rotation axis (33), and the side of the telescopic rod (34) away from the step bottom plate (31) is hinged on the lower surface of the deflection mounting plate (32).

6. The positioning and clamping tool for automobile welding according to claim 5, characterized in that: The first limiting member (2) is mounted on the upper surface of the deflection mounting plate (32); The first position-limiting member (2) comprises a U-shaped clamp body (21) mounted sideways on the deflection mounting plate (32) and an adjusting screw (22) passing through the U-shaped clamp body (21). The end of the adjusting screw (22) located in the U-shaped clamp (21) is rotatably connected to a limiting pressure plate (23).

7. The positioning and clamping tool for automobile welding according to claim 6, characterized in that: The guide groove body (41) of the transverse movement mechanism (4) is embedded on the workbench (1). A transmission screw (42) is rotatably provided in the groove cavity of the guide groove body (41), and a slider (43) is sleeved on the transmission screw (42), the movable direction of which is limited by the guide groove body (41); One end of the transmission screw (42) passes through the end surface of the guide groove body (41) and is transmission-connected to the transverse driving motor (44); A lifting support column (45) for supporting the step bottom plate (31) is provided on the end surface of the sliding block (43) extending to the outside of the guide groove body (41).

8. The positioning and clamping tool for automobile welding according to claim 7, characterized in that: The rotary support mechanism (6) comprises a lifting platform (61) supported on the workbench (1), a steering motor (62) mounted on the lifting platform (61), and a connecting sleeve (63) connected to the rotary output end of the steering motor (62).

9. The positioning and clamping tool for automobile welding according to claim 8, characterized in that: One end of the semicircular arc track (51) is provided with a plug-in square column (513), and the plug-in square column (513) is detachably plugged into the connecting sleeve (63).

10. The positioning and clamping tool for automobile welding according to claim 9, characterized in that: Universal wheels (11) with locks that facilitate movement are provided at the bottom of the workbench (1).

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