Rapid positioning and clamping mechanism for welding

Abstract

The utility model discloses a quick positioning and clamping mechanism for welding, and relates to the technical field of welding equipment. The device comprises a base, placing plates are arranged on the two sides of the upper portion of the base through adjusting assemblies, and clamping assemblies are arranged on the placing plates; the adjusting assembly comprises moving columns movably connected to the two sides of the top of the base respectively, rotating shafts rotationally penetrate through the upper portions of the outer walls of the moving columns, L-shaped plates are welded to one ends of the rotating shafts, the containing plates are fixedly connected to transverse supporting arms of the L-shaped plates, and the other ends of the rotating shafts are sleeved with first synchronous wheels. The square rod drives the sleeve rod and the L-shaped plate to rotate, so that the L-shaped plate drives a workpiece to rotate through the placing plate, the problem that the welded workpiece is inconvenient to turn over automatically in the prior art is solved, meanwhile, the plate-shaped workpiece is clamped through the pressing plate, the special-shaped workpiece is clamped through the sleeve and the abutting rod, and the welding efficiency is improved. The problem that in the prior art, workpieces in different shapes are inconvenient to clamp is solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to welding equipment technical field, especially, a kind of quick positioning clamping mechanism for welding. BACKGROUND

[0002] Welding is also known as fusion welding, it is a kind of with heating, high temperature or high pressure way joint metal or other thermoplastic material manufacturing process, and in the welding process, to avoid staff being scalded by high temperature on workpiece, usually use clamping mechanism, workpiece is clamped by clamping mechanism and placed on welding equipment, effectively protect staff, also improve the precision of welding;

[0003] The file with the existing announcement number CN221603691U discloses a clamping mechanism for workpiece welding, including base, fixed seat is arranged on the base, lifting seat is arranged on the fixed seat and can be lifted, installation groove is opened on the lifting seat, installation block is arranged in the installation groove, rotating adjusting structure is arranged between the installation block and the lifting seat, installation sleeve is arranged on the front side of the installation block, installation plate is rotatably adjusted in the installation sleeve, workpiece clamping assembly is arranged on the installation plate, through groove is cooperatively opened on the installation block, installation sleeve and installation plate, support seat is arranged on one side of the base and can be stretched, fixed column is arranged on the support seat, lifting column is arranged on the fixed column and can be lifted, support frame is hingedly arranged on the top of the lifting column.

[0004] But it still has the following disadvantages in actual use:

[0005] 1, the clamping mechanism in the above, installation sleeve is arranged on the base through lifting seat, installation plate is arranged in the installation sleeve, workpiece clamping assembly is arranged on the installation plate, support seat is arranged on one side of the base, and support frame is arranged above the support seat, workpiece is clamped by workpiece clamping assembly and support frame, but in the using process, it is not convenient to turn over workpiece, so that only one surface of workpiece can be welded, when multiple surfaces of workpiece need to be welded, workpiece needs to be turned over manually, and the practicability is poor.

[0006] 2, the clamping mechanism in the above, workpiece clamping assembly includes fixed plate located at the edge of installation plate, clamping block is arranged on the fixed plate through electric push rod, workpiece is clamped by driving clamping block through electric push rod, but in the using process, since the shape of workpiece has diversity, and the shape of clamping block is fixed, so that only one kind of workpiece can be clamped in use.

[0007] Therefore, we provide a quick positioning clamping mechanism for welding to solve the above problems. UTILITY MODEL CONTENTS

[0008] The utility model discloses a quick positioning and clamping mechanism for welding, which is characterized by the following technical scheme.

[0009] To solve the above technical problems, the utility model is realized through the following technical scheme:

[0010] The utility model discloses a quick positioning and clamping mechanism for welding, which comprises a base, and placing plates are arranged on the upper sides of the base through adjusting assemblies.

[0011] The adjusting assembly comprises movable columns movably connected to the top of the base on both sides, a rotating shaft is rotatably penetrated through the outer wall of the movable column on the top, L-shaped plates are welded to one end of the rotating shaft, the placing plates are fixedly connected to the horizontal supporting arms of the L-shaped plates, first synchronous wheels are sleeved to the other end of the rotating shaft, mounting seats are welded to the front end surface of the movable column, a sleeve rod is rotatably penetrated through the outer wall of the mounting seat, a second synchronous wheel is sleeved to the outer wall of the sleeve rod, the first synchronous wheel and the second synchronous wheel are transmissionally connected through a first synchronous belt, and a square rod is movably sleeved in the sleeve rod.

[0012] The clamping assembly comprises a movable plate movably connected to the placing plate, a U-shaped frame is rotatably connected to the upper surface of the movable plate, a pressing plate is movably connected to the inside of the U-shaped frame, a plurality of sleeves are fixedly connected to the vertical supporting arms of the U-shaped frame in a rectangular array at equal intervals, abutting rods are movably penetrated through the inside of the sleeves, abutting plates are welded to one end of the abutting rods on the outside of the sleeves, limit plates are welded to the other end of the abutting rods on the inside of the sleeves, return springs are fixedly connected to one side of the limit plates away from the abutting rods, and the other end of the return springs away from the limit plates is fixedly connected to the inner wall of the sleeve.

[0013] Further, a first sliding groove is formed in the top center position of the base along the horizontal direction, a bidirectional screw rod is rotatably connected to the inside of the first sliding groove, the two ends of the bidirectional screw rod are rotatably penetrated through the inner walls of the two sides of the first sliding groove and are fixedly connected to a first hand wheel, second sliding blocks are threadedly sleeved to the two sides of the bidirectional screw rod, and the bottom end of the movable column is welded to the top of the second sliding blocks.

[0014] Further, a double-shaft motor is fixedly connected to the top front end of the base through a motor bracket, and the output shaft of the double-shaft motor is fixedly connected to one end of the square rod.

[0015] The further setting of the utility model is that the lower portion of the base is provided with a longitudinal adjusting seat, a third sliding groove is longitudinally arranged at the top center position of the longitudinal adjusting seat, a first screw rod is rotatably connected in the third sliding groove, the two ends of the first screw rod are rotatably penetrated through the front and rear end faces of the third sliding groove and are fixedly connected with a third hand wheel, a fourth sliding block is threadedly sleeved on the first screw rod, a horizontal adjusting seat is welded on the top of the fourth sliding block, mounting frames are fixedly connected with the top front and rear ends of the horizontal adjusting seat along the horizontal direction, second screw rods are rotatably connected in the mounting frames, first sliding blocks are threadedly sleeved on the second screw rods, the top of the first sliding blocks is welded on the bottom front and rear ends of the base, the two ends of the second screw rods are rotatably penetrated through the two side outer walls of the mounting frames and are fixedly connected with a fourth hand wheel and a third synchronous wheel respectively, and the third synchronous wheels are drivingly connected through a second synchronous belt.

[0016] The further setting of the utility model is that a plurality of guide wheels are rotatably connected at the two sides of the bottom of the horizontal adjusting seat at equal intervals, and the bottom of the guide wheel is abuttingly connected to the two sides of the top of the longitudinal adjusting seat.

[0017] The further setting of the utility model is that second sliding grooves are arranged on the longitudinal supporting arms of the placing plate, third sliding blocks are movably connected in the second sliding grooves, the third sliding blocks are penetrated through the second sliding grooves and are welded on the two side outer walls of the movable plates respectively, a mounting rod is rotatably penetrated through the surface center position of the movable plate, and the top end of the mounting rod is welded on the bottom of the U-shaped frame.

[0018] The further setting of the utility model is that rubber pads are attached on the inner bottom of the U-shaped frame and the lower surface of the pressing plate, protrusions are welded on the two sides of the end face of the pressing plate close to the vertical supporting arm of the U-shaped frame, and the free ends of the protrusions are movably connected in the grooves on the vertical supporting arm of the U-shaped frame.

[0019] The further setting of the utility model is that a threaded rod is threadedly penetrated through the top of the U-shaped frame, a second hand wheel is fixedly connected with the top end of the threaded rod, and the bottom end of the threaded rod is fixedly connected with the upper surface of the pressing plate.

[0020] The utility model has the following beneficial effects:

[0021] 1、 the utility model discloses a setting adjusting assembly, starts double shaft motor, and the output shaft of double shaft motor drives square bar to rotate, and square bar drives second synchronous wheel to rotate through sleeve rod, and under the transmission of first synchronous belt, first synchronous wheel drives L type plate to rotate through rotating shaft, and makes placing plate drive workpiece to rotate, realizes the automatic turning of workpiece, and it is convenient to carry out the welding work to the multiple surfaces of workpiece, and improves its practicality.

[0022] 2. The utility model discloses a clamping assembly is set up, when needing to clamp the plate -shaped workpiece, the both ends of plate -shaped workpiece are placed in the inside of U type frame, and through the second hand wheel drive screw rod rotates, makes the screw rod drive the pressing plate and goes up and down, through the cooperation of U type frame and pressing plate to clamp the plate -shaped workpiece, when needing to clamp the abnormal workpiece, rotates U type frame, makes the abutment rod be located abnormal workpiece both sides's front and back end respectively, and through movable plate drive U type frame and moves, makes the abutment plate respectively and touches on abnormal workpiece, and under the cooperation of reset spring, realizes the abnormal workpiece clamping on the placing plate, the workpiece of convenient to a plurality of shapes is clamped and works, improved its applicability.

[0023] Of course, implementing any product of the utility model does not necessarily need to achieve all the advantages described above at the same time. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0025] Figure 1 It is a kind of whole structure schematic diagram of quick positioning clamping mechanism for welding.

[0026] Figure 2 It is the structure exploded view of base of the utility model.

[0027] Figure 3 It is the structure schematic diagram of the utility model Figure 2 The structure exploded view of mounting frame.

[0028] Figure 4 It is the structure schematic diagram of adjusting assembly of the utility model.

[0029] Figure 5 It is the structure schematic diagram of mobile column of the utility model.

[0030] Figure 6 It is the structure schematic diagram of L type plate of the utility model.

[0031] Figure 7 It is the structure exploded view of square bar of the utility model.

[0032] Figure 8 It is the structure schematic diagram of placing plate of the utility model.

[0033] Figure 9 It is the structure schematic diagram of clamping assembly of the utility model.

[0034] Figure 10 It is the installation schematic view between the movable plate and the U-shaped frame of the utility model.

[0035] Figure 11 It is the structure schematic view of the pressing plate of the utility model.

[0036] Figure 12 It is the side view sectional view of the sleeve of the utility model.

[0037] In the drawings, the component list represented by each sign is as follows:

[0038] 1-base, 101-first sliding groove, 102-first sliding block, 2-adjusting assembly, 201-moving column, 201a-bi-directional screw rod, 201b-first hand wheel, 201c-second sliding block, 201d-mounting seat, 202-L-shaped plate, 202a-rotation shaft, 202b-first synchronous wheel, 202c-first synchronous belt, 203-sleeve rod, 203a-second synchronous wheel, 204-square rod, 205-double-shaft motor, 205a-motor frame, 3-placing plate, 301-second sliding groove, 4-clamping assembly, 401-movable plate, 401a-third sliding block, 402-U-shaped frame, 402a-mounting rod, 402b-rubber pad, 403-pressing plate, 403a-bulge, 403b-threaded rod, 403c-second hand wheel, 404-sleeve, 405-abutment rod, 405a-abutment plate, 405b-limiting plate, 405c-return spring, 5-longitudinal adjusting seat, 501-third sliding groove, 502-first screw rod, 503-third hand wheel, 6-lateral adjusting seat, 601-fourth sliding block, 602-guide wheel, 603-mounting frame, 603a-second screw rod, 603b-fourth hand wheel, 603c-third synchronous wheel, 603d-second synchronous belt. DETAILED DESCRIPTION

[0039] The technical schemes in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model.

[0040] Embodiment 1

[0041] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8As shown, it is the first embodiment of the utility model, this embodiment provides a kind of quick positioning clamping mechanism for welding, including base 1, the top of base 1 both sides are provided with placing plate 3 by adjusting assembly 2, adjusting assembly 2 includes moving column 201, L-shaped plate 202, sleeve rod 203 and square rod 204, L-shaped plate 202 is rotated by sleeve rod 203 and square rod 204 drive, placing plate 3 and workpiece are rotated by L-shaped plate 202 drive, solve the problem that the workpiece of welding is not conveniently automatically turned over, it is convenient to weld the multiple surfaces of workpiece.

[0042] Specifically, moving column 201 is movably connected to the top of base 1 on both sides, a rotating shaft 202a is rotatably penetrated through the outer wall of moving column 201, an L-shaped plate 202 is welded to one end of rotating shaft 202a, placing plate 3 is fixedly connected to the horizontal arm of L-shaped plate 202, a first synchronous wheel 202b is sleeved on the other end of rotating shaft 202a, an installation seat 201d is welded to the front end surface of moving column 201, a sleeve rod 203 is rotatably penetrated through the outer wall of installation seat 201d, a second synchronous wheel 203a is sleeved on the outer wall of sleeve rod 203, the first synchronous wheel 202b and the second synchronous wheel 203a are drivingly connected by a first synchronous belt 202c, a square rod 204 is movably sleeved in the sleeve rod 203, the installation seat 201d is arranged to install the sleeve rod 203, the L-shaped plate 202 is arranged to install the placing plate 3 and rotate the placing plate 3, the rotating shaft 202a is arranged to rotate the L-shaped plate 202 and rotate the L-shaped plate 202, the first synchronous wheel 202b and the first synchronous belt 202c are arranged to rotate the rotating shaft 202a, the sleeve rod 203 is arranged to rotate the second synchronous wheel 203a, the second synchronous wheel 203a is arranged to rotate the first synchronous wheel 202b, and the square rod 204 is arranged to rotate the sleeve rod 203.

[0043] Further, a first sliding groove 101 is formed in the top center of base 1 along the horizontal direction, a bidirectional screw rod 201a is rotatably connected in the first sliding groove 101, the two ends of bidirectional screw rod 201a are rotatably penetrated through the inner walls of the two sides of first sliding groove 101 and fixedly connected with a first hand wheel 201b, a second sliding block 201c is threadedly sleeved on the two sides of bidirectional screw rod 201a, and the top of second sliding block 201c is welded to the bottom end of moving column 201.

[0044] A double-shaft motor 205 is fixedly connected to the top front end of base 1 through a motor bracket 205a, and one end of square rod 204 is fixedly connected to the output shaft of double-shaft motor 205.

[0045] The bottom of the base 1 is provided with a longitudinal adjusting seat 5, the top center position of the longitudinal adjusting seat 5 is provided with a third sliding groove 501 in the longitudinal direction, the inside of the third sliding groove 501 is rotationally connected with a first lead screw 502, the two ends of the first lead screw 502 are rotationally penetrated through the front and rear end faces of the third sliding groove 501 and are fixedly connected with a third hand wheel 503, a fourth sliding block 601 is threadedly sleeved on the first lead screw 502, the top of the fourth sliding block 601 is welded with a transverse adjusting seat 6, the top front and rear ends of the transverse adjusting seat 6 are fixedly connected with a mounting frame 603 in the transverse direction, the inside of the mounting frame 603 is rotationally connected with a second lead screw 603a, a first sliding block 102 is threadedly sleeved on the second lead screw 603a, the top of the first sliding block 102 is welded on the bottom front and rear ends of the base 1, the two ends of the second lead screw 603a are rotationally penetrated through the two side outer walls of the mounting frame 603 and are fixedly connected with a fourth hand wheel 603b and a third synchronous wheel 603c respectively, the third synchronous wheel 603c is drivingly connected through a second synchronous belt 603d.

[0046] The bottom sides of the transverse adjusting seat 6 are rotationally connected with a plurality of guide wheels 602 at equal intervals, and the bottom of the guide wheel 602 is abuttingly connected to the top of the longitudinal adjusting seat 5.

[0047] The operation process of the embodiment is as follows: the two ends of the workpiece are clamped on the placement plate 3, and the surface of the workpiece is welded by the welding equipment; when another surface of the workpiece needs to be welded, the double-shaft motor 205 is started, the output shaft of the double-shaft motor 205 drives the square rod 204 to rotate, the square rod 204 drives the second synchronous wheel 203a to rotate through the sleeve rod 203, and under the driving action of the first synchronous belt 202c, the first synchronous wheel 202b drives the L-shaped plate 202 to rotate through the rotating shaft 202a, so that the placement plate 3 drives the workpiece to rotate, and the automatic turning of the workpiece is realized.

[0048] Embodiment 2

[0049] Please refer to Figure 1 、 Figure 9 、 Figure 10 、 Figure 11 and Figure 12 , which is a second embodiment of the utility model, which is based on the previous embodiment, but differs from the previous embodiment in that the placement plate 3 is further provided with a clamping assembly 4, the clamping assembly 4 comprises a movable plate 401, a U-shaped frame 402, a pressing plate 403, a sleeve 404 and an abutting rod 405, the U-shaped frame 402 and the pressing plate 403 cooperate to clamp the plate-shaped workpiece, and a plurality of sleeves 404 and abutting rods 405 cooperate to clamp the irregular workpiece, thereby solving the problem that the existing device is not convenient for clamping workpieces of various shapes.

[0050] Specifically, the movable plate 401 is movably connected to the placement plate 3, the upper surface of the movable plate 401 is rotatably connected with a U-shaped frame 402, the inside of the U-shaped frame 402 is movably connected with a pressing plate 403, a plurality of sleeves 404 are fixedly connected on the vertical supporting arms of the U-shaped frame 402 in a rectangular array at equal intervals, abutting rods 405 are movably penetrated into the sleeves 404, abutting plates 405a are welded on the ends of the abutting rods 405 outside the sleeves 404, limit plates 405b are welded on the ends of the abutting rods 405 inside the sleeves 404, reset springs 405c are fixedly connected on the sides of the limit plates 405b away from the abutting rods 405, and the ends of the reset springs 405c away from the limit plates 405b are fixedly connected to the inner walls of the sleeves 404. The movable plate 401 is arranged to drive the U-shaped frame 402 to move relative to the placement plate 3, so as to facilitate clamping work on workpieces of different widths. The U-shaped frame 402 and the pressing plate 403 cooperate to clamp plate-shaped workpieces. The sleeves 404 and the abutting rods 405 cooperate to clamp irregular-shaped workpieces. The abutting plates 405a are arranged to realize contact between the abutting rods 405 and the irregular-shaped workpieces. The limit plates 405b and the reset springs 405c are arranged to movably arrange the abutting rods 405 inside the sleeves 404.

[0051] Further, the longitudinal supporting arms of the placement plate 3 are each provided with a second sliding groove 301, the inside of the second sliding groove 301 is movably connected with a third sliding block 401a, one side of the third sliding block 401a penetrates through the second sliding groove 301 and is respectively welded on the outer walls on both sides of the movable plate 401, and a bolt is additionally arranged on the third sliding block 401a, one end of the bolt is threadedly connected with the placement plate 3, the movement of the third sliding block 401a is limited by the bolt, and the positions between the placement plate 3 and the movable plate 401 are fixed.

[0052] A mounting rod 402a is rotatably penetrated through the center of the surface of the movable plate 401, and the top end of the mounting rod 402a is welded on the bottom of the U-shaped frame 402.

[0053] Rubber pads 402b are adhered on the inside bottom of the U-shaped frame 402 and the lower surface of the pressing plate 403, protrusions 403a are welded on the end faces of the pressing plate 403 near the vertical supporting arms of the U-shaped frame 402, and the free ends of the protrusions 403a are movably connected in the grooves on the vertical supporting arms of the U-shaped frame 402.

[0054] A threaded rod 403b is threadedly penetrated through the top of the U-shaped frame 402, a second hand wheel 403c is fixedly connected to the top end of the threaded rod 403b, and the bottom end of the threaded rod 403b is fixedly connected to the upper surface of the pressing plate 403.

[0055] The remaining structures are the same as those in Embodiment 1.

[0056] The operation process of the embodiment is as follows: when the plate-shaped workpiece needs to be clamped, the two ends of the plate-shaped workpiece are placed in the interior of the U-shaped frame 402, and the threaded rod 403b is driven to rotate by the second hand wheel 403c, so that the threaded rod 403b drives the pressing plate 403 to ascend and descend, and the plate-shaped workpiece is clamped by the cooperation of the U-shaped frame 402 and the pressing plate 403; when the irregular workpiece needs to be clamped, the U-shaped frame 402 is rotated, so that the abutting rods 405 are located at the front and rear ends on both sides of the irregular workpiece, and the U-shaped frame 402 is driven to move by the movable plate 401, so that the abutting plates 405a abut on the irregular workpiece respectively, and under the cooperation of the return springs 405c, the irregular workpiece is clamped on the placing plate 3.

[0057] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0058] The preferred embodiments of the above disclosed utility model are only used to help explain the utility model. The preferred embodiments do not describe all the details and do not limit the utility model to the specific embodiments described. Obviously, according to the content of the present specification, many modifications and changes can be made. The present specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that the skilled in the art can well understand and utilize the utility model. The utility model is limited by the claims and the entire scope and equivalents thereof.

Claims

1. A quick positioning and clamping mechanism for welding, comprising a base (1), characterized in that: The upper two sides of the base (1) are provided with placing plates (3) through adjusting assemblies (2), and the placing plates (3) are provided with clamping assemblies (4); The adjusting assembly (2) comprises movable columns (201) movably connected at the top of the two sides of the base (1), respectively, a rotating shaft (202a) penetrates the outer wall of the movable column (201) from above, one end of the rotating shaft (202a) is welded with an L-shaped plate (202), the placing plate (3) is fixedly connected to the horizontal branch of the L-shaped plate (202), the other end of the rotating shaft (202a) is sleeved with a first synchronous wheel (202b), a mounting seat (201d) is welded to the front end face of the movable column (201) from below, a sleeve rod (203) penetrates the outer wall of the mounting seat (201d) from above, the sleeve rod (203) is sleeved with a second synchronous wheel (203a), the first synchronous wheel (202b) and the second synchronous wheel (203a) are drivingly connected through a first synchronous belt (202c), and a square rod (204) is movably sleeved in the sleeve rod (203); The clamping assembly (4) comprises a movable plate (401) movably connected to the placing plate (3), a U-shaped frame (402) is rotatably connected to the upper surface of the movable plate (401), a pressing plate (403) is movably connected to the inside of the U-shaped frame (402), a plurality of sleeve sleeves (404) are fixedly connected to the vertical branches of the U-shaped frame (402) in a rectangular array at equal intervals, abutting rods (405) are movably penetrated in the sleeve sleeves (404), abutting plates (405a) are welded to one end of the abutting rods (405) outside the sleeve sleeves (404), limit plates (405b) are welded to one end of the abutting rods (405) inside the sleeve sleeves (404), reset springs (405c) are fixedly connected to one side of the limit plates (405b) away from the abutting rods (405), and the other end of the reset springs (405c) is fixedly connected to the inner wall of the sleeve sleeve (404).

2. A quick positioning and clamping mechanism for welding as claimed in claim 1, wherein, A first sliding groove (101) is formed in the top center of the base (1) in the transverse direction, a bidirectional screw rod (201a) is rotatably connected in the first sliding groove (101), the two ends of the bidirectional screw rod (201a) rotatably penetrate the inner walls of the two sides of the first sliding groove (101) and are fixedly connected with first hand wheels (201b), and second sliding blocks (201c) are threadedly sleeved on the two sides of the bidirectional screw rod (201a), and the top of the second sliding block (201c) is welded to the bottom end of the movable column (201).

3. A quick positioning and clamping mechanism for welding as claimed in claim 1 wherein, The top front end of the base (1) is fixedly connected with a double-shaft motor (205) through a motor bracket (205a), and one end of the square rod (204) is fixedly connected with the output shaft of the double-shaft motor (205).

4. A quick positioning and clamping mechanism for welding as claimed in claim 3, wherein, The lower portion of the base (1) is provided with a longitudinal adjusting seat (5), and the top center position of the longitudinal adjusting seat (5) is provided with a third sliding groove (501) in the longitudinal direction. The inside of the third sliding groove (501) is rotatably connected with a first lead screw (502), and the two ends of the first lead screw (502) are rotatably penetrated through the front and rear end faces of the third sliding groove (501) and are fixedly connected with a third hand wheel (503). A fourth sliding block (601) is threadedly sleeved on the first lead screw (502), and the top of the fourth sliding block (601) is welded with a transverse adjusting seat (6). The top front and rear ends of the transverse adjusting seat (6) are fixedly connected with a mounting frame (603) in the transverse direction, and the inside of the mounting frame (603) is rotatably connected with a second lead screw (603a). A first sliding block (102) is threadedly sleeved on the second lead screw (603a), and the top of the first sliding block (102) is welded on the bottom front and rear ends of the base (1). The two ends of the second lead screw (603a) are rotatably penetrated through the two side outer walls of the mounting frame (603) and are fixedly connected with a fourth hand wheel (603b) and a third synchronous wheel (603c), respectively, and the third synchronous wheels (603c) are drivingly connected through a second synchronous belt (603d).

5. A quick positioning and clamping mechanism for welding as claimed in claim 4, wherein, The bottom sides of the transverse adjusting seat (6) are rotatably connected with a plurality of guide wheels (602) at equal intervals, and the bottom of the guide wheel (602) is abuttingly connected to the top of the longitudinal adjusting seat (5).

6. A quick positioning and clamping mechanism for welding as claimed in claim 1 wherein, The longitudinal supporting arms of the placing plate (3) are provided with a second sliding groove (301), and the inside of the second sliding groove (301) is movably connected with a third sliding block (401a). One side of the third sliding block (401a) penetrates through the second sliding groove (301) and is welded on the two side outer walls of the movable plate (401), and the surface center position of the movable plate (401) is rotatably penetrated with a mounting rod (402a). The top end of the mounting rod (402a) is welded on the bottom of the U-shaped frame (402).

7. A quick positioning and clamping mechanism for welding as claimed in claim 1 wherein, The inner bottom of the U-shaped frame (402) and the lower surface of the pressing plate (403) are both bonded with rubber pads (402b), and the end faces of the pressing plate (403) near the vertical supporting arms of the U-shaped frame (402) are both welded with protrusions (403a). The free ends of the protrusions (403a) are movably connected in the grooves on the vertical supporting arms of the U-shaped frame (402).

8. A quick positioning and clamping mechanism for welding as claimed in claim 7, wherein, The top of the U-shaped frame (402) is threadedly penetrated with a threaded rod (403b), and the top end of the threaded rod (403b) is fixedly connected with a second hand wheel (403c). The bottom end of the threaded rod (403b) is fixedly connected to the upper surface of the pressing plate (403).

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