A positioning device for workpiece welding

Abstract

The present invention relates to the technical field of workpiece welding, and in particular to a positioning device for workpiece welding, which includes a machine body and a plurality of movable positioning units all arranged on the periphery of the machine body, and the machine body is provided with a plurality of fixed positioning units; during use, the workpiece is installed on the plurality of fixed positioning units for fixation, and then the movable positioning units extend into the machine body and further fix the workpiece. By providing fixed positioning units on the machine body and movable positioning units on the periphery of the machine body, that is, during positioning, after the workpiece is positioned by the fixed positioning units first, the movable positioning units are driven to move near the workpiece to achieve further positioning, thus ensuring the positioning effect without reducing the number of positioning units and avoiding interference between the positioning units.

Description

Technical Field

[0001] The present invention relates to the technical field of workpiece welding, and in particular to a positioning device for workpiece welding. Background Art

[0002] For workpieces, such as automotive workpieces, they are generally made by welding multiple separately stamped parts. In this process, since multiple parts need to be positioned, the positioning mechanisms involved are also necessarily multiple. Obviously, since the positioning mechanism must at least include two actions of opening and closing, the space required for the positioning mechanism is relatively large. As a result, if there are too many positioning mechanisms arranged on the machine body, there will be some interference between the positioning mechanisms, thus affecting the positioning effect. Summary of the Invention

[0003] The present invention provides a positioning device for workpiece welding in view of the problems of the prior art, which can make full use of space and avoid interference between positioning mechanisms without reducing the number of positioning mechanisms.

[0004] To solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A positioning device for workpiece welding provided by the present invention includes a machine body and a plurality of movable positioning units all arranged on the periphery of the machine body, and a plurality of fixed positioning units are arranged on the machine body;

[0006] In use, the workpiece is installed on a plurality of fixed positioning units for fixation, and then the movable positioning units extend into the machine body and further fix the workpiece.

[0007] Further, the fixed positioning unit includes a fixed seat, a flipping member, and a flipping driving mechanism. A plurality of positioning members are arranged at intervals on the top of the fixed seat. The bottom of the flipping member is provided with a number of pressing members equal to the number of the positioning members. A limiting mechanism is arranged between the flipping driving mechanism and the flipping member;

[0008] In use, the workpiece is supported by a plurality of positioning members in cooperation, and then the flipping driving mechanism drives the flipping member to flip so that the pressing members press down on the top of the workpiece, and the positions of the pressing members are arranged in one-to-one correspondence with the positions of the positioning members. The limiting mechanism is used to prevent the pressing members from pressing down too deeply.

[0009] Furthermore, the limiting mechanism includes a limiting seat and a limiting member. The limiting seat is arranged on one side of the flipping driving mechanism. The flipping member is arranged at the end of the flipping driving mechanism. The limiting member is arranged on the flipping member, and the limiting member is located between the positioning member and the flipping driving mechanism; the limiting member is used to abut against the limiting seat.

[0010] Preferably, a limiting protrusion is detachably provided on the top of the limiting seat, and a limiting groove is detachably provided on the bottom of the limiting member, and the limiting protrusion is used to be assembled in the limiting groove to achieve limiting;

[0011] A gasket is arranged on the top of the positioning piece.

[0012] Furthermore, the movable positioning unit includes a base, a first clamping member, a second clamping member and a first driving mechanism for driving the base to move, the first clamping member is arranged on the base, the second clamping member is rotatably arranged on the base, the first clamping member is located directly below the second clamping member, and the first clamping member and the second clamping member are arranged opposite each other; the base is provided with a second driving mechanism for driving the second clamping member to flip.

[0013] Furthermore, the second clamping member includes a second clamping seat and a second clamping rod, the second clamping seat is rotatably set on the base, one end of the second clamping rod is mounted on the second clamping seat, and the other end of the second clamping rod is provided with a second contact head for abutting against the workpiece, and the second contact head points to the first clamping member; the other end of the second clamping rod is bent in a direction close to the first clamping member to form a second mounting portion, and the second contact head is detachably mounted on the second mounting portion.

[0014] Preferably, the second clamping seat comprises a rotating part and a connecting part, the rotating part and the connecting part are arranged at an obtuse angle, the rotating part is rotatably connected to the base, and the second clamping rod is installed on the connecting part; the output end of the second driving mechanism is connected to the connection between the rotating part and the connecting part;

[0015] An elastic auxiliary member is also provided between the base and the rotating part, and the elastic auxiliary member is used for buffering when the second clamping seat is turned over.

[0016] Furthermore, the second driving mechanism includes a driving motor, a transmission mechanism, and a connection mechanism connected to the second clamping member, the driving motor and the transmission mechanism are both installed on the base, and the driving motor is used to drive the second clamping member to flip through the transmission mechanism;

[0017] The transmission mechanism includes a transmission belt assembly and a reducer, the driving motor is connected to the input end of the reducer through the transmission belt assembly, and the output end of the reducer is rotatably connected to the middle part of the second clamping member and is used to drive the second clamping member to flip;

[0018] The reducer is rotatably arranged on the base.

[0019] Further, the machine body includes a movable unit and a fixed unit, the movable unit includes a main body and a plurality of wheels all arranged at the bottom of the main body, and a plurality of fixed positioning units are all arranged at the top of the main body; the fixed unit includes a base and a plurality of jacking mechanisms all arranged at the base;

[0020] The lifting mechanism is used to lift up the main body after the main body moves to just above the base so that the wheels are suspended in the air to achieve a positioning effect for the main body.

[0021] Furthermore, a plurality of transition mechanisms are provided at the bottom of the main body, and the plurality of transition mechanisms are distributed in two rows on the main body; the transition mechanism comprises a connecting seat, a first transition wheel and a second transition wheel, the connecting seat is installed at the bottom of the main body, the first transition wheel is rotatably provided at the bottom of the connecting seat, the second transition wheel is rotatably provided at one side of the connecting seat, and the two rows of second transition wheels are back to back to each other;

[0022] The base is provided with two first slideways, which are respectively used to interfere with the two rows of first transition wheels; the jacking mechanism includes a jacking seat and a jacking cylinder installed on the jacking seat, the jacking seat is arranged on the base, and the piston rod of the jacking cylinder is provided with an interference piece; the side wall of the jacking seat is provided with a second slideway for interfering with the second transition wheel.

[0023] Beneficial effects of the present invention: The present invention is provided with a fixed positioning unit on the machine body and a movable positioning unit on the periphery of the machine body. That is, during positioning, the workpiece is first positioned by the fixed positioning unit, and then the movable positioning unit is driven to move to the vicinity of the workpiece to achieve further positioning, thereby ensuring the positioning effect without reducing the number of positioning units and avoiding interference between the positioning units. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the present invention.

[0025] Figure 2 It is a schematic diagram of the fixed positioning unit of the present invention.

[0026] Figure 3 It is an exploded schematic diagram of the flipping member and the limiting mechanism of the present invention.

[0027] Figure 4 It is a schematic diagram of the movable positioning unit of the present invention.

[0028] Figure 5 Schematic diagram of the second clamping member of the present invention.

[0029] Figure 6 It is a schematic diagram of the second driving mechanism of the present invention.

[0030] Figure 7 Schematic diagram of the movable unit of the present invention.

[0031] Figure 8 Schematic diagram of the fixed unit of the present invention.

[0032] Reference numerals: 1 - body, 2 - movable positioning unit, 3 - fixed positioning unit, 4 - movable unit, 5 - fixed unit, 6 - handle, 21 - base, 22 - first clamping member, 23 - second clamping member, 25 - second driving mechanism, 26 - second clamping seat, 27 - second clamping rod, 28 - second abutting head, 29 - second mounting portion, 31 - fixed seat, 32 - flipping member, 33 - flipping driving mechanism, 34 - positioning member, 35 - pressing member, 36 - limiting mechanism, 37 - limiting seat, 38 - limiting member, 41 - main body, 42 - wheel, 43 - transition mechanism, 44 - connecting seat, 45 - first transition wheel, 46 - second transition wheel, 51 - base, 52 - jacking mechanism, 53 - first slideway, 54 - jacking seat, 55 - jacking oil cylinder, 56 - second slideway, 57 - guiding portion, 211 - mounting flange, 251 - driving motor, 252 - transmission mechanism, 253 - connecting mechanism, 254 - belt transmission assembly, 255 - speed reducer, 261 - rotating portion, 262 - connecting portion, 263 - elastic auxiliary member, 291 - extension rod, 341 - gasket, 371 - limiting projection, 381 - limiting groove. Detailed implementation manners

[0033] For the convenience of understanding by those skilled in the art, the present invention will be further described below in conjunction with embodiments and the accompanying drawings. The content mentioned in the implementation manners does not limit the present invention. The present invention will be described in detail below with reference to the accompanying drawings.

[0034] As Figures 1 to 8 shown, a positioning device for workpiece welding provided by the present invention includes a body 1 and a plurality of movable positioning units 2 all arranged on the periphery of the body 1, and the body 1 is provided with a plurality of fixed positioning units 3;

[0035] When the present invention is needed for positioning, the staff first installs the various parts of the workpiece on several fixed positioning units 3 for the first fixation, which is mainly used to position the workpiece; then the movable positioning unit 2 extends into the machine body 1 and clamps the workpiece, thereby achieving the second positioning. Compared with the prior art, the present invention is provided with a fixed positioning unit 3 on the machine body 1, and an movable positioning unit 2 is provided on the periphery of the machine body 1, that is, when positioning, the workpiece is first positioned by the fixed positioning unit 3, and then the movable positioning unit 2 is driven to move to the vicinity of the workpiece to achieve further positioning, thereby ensuring the positioning effect without reducing the number of positioning units (i.e., the general term for the fixed positioning unit 3 and the movable positioning unit 2), and avoiding interference between the positioning units.

[0036] In this embodiment, the fixed positioning unit 3 includes a fixed seat 31, a flip member 32 and a flip driving mechanism 33. A plurality of positioning members 34 are arranged at intervals on the top of the fixed seat 31. The bottom of the flip member 32 is provided with a pressing member 35 having the same number as the positioning members 34. A limiting mechanism 36 is provided between the flip driving mechanism 33 and the flip member 32. Specifically, since the main action of the flip driving mechanism 33 of this embodiment is only flipping, the flip driving mechanism 33 preferably adopts a pneumatic element, such as a rotary cylinder.

[0037] The working method of the fixed positioning unit 3 is as follows: the various parts of the workpiece are placed on different fixed positioning units 3, and the corresponding multiple positioning members 34 of the fixed positioning unit 3 cooperate to support the workpiece, and then the flip drive mechanism 33 drives the flip member 32 to flip so that the pressing member 35 presses down the top of the workpiece, and the position of the pressing member 35 is set in a one-to-one correspondence with the position of the positioning member 34, and the limiting mechanism 36 is used to prevent the pressing member 35 from pressing down too deep. That is, the positioning member 34 and the mortgage member 35 are close to each other to achieve the effect of clamping the workpiece to achieve the positioning effect; in this process, in order to prevent the workpiece from being clamped and damaged, a limiting mechanism 36 is set, that is, the limiting mechanism 36 is used to prevent the flip member 32 from flipping over and causing it to be pressed down too deep.

[0038] Specifically, the limiting mechanism 36 includes a limiting seat 37 and a limiting member 38, the limiting seat 37 is arranged on one side of the flipping drive mechanism 33, the flipping member 32 is arranged at the end of the flipping drive mechanism 33, the limiting member 38 is arranged on the flipping member 32, and the limiting member 38 is located between the positioning member 34 and the flipping drive mechanism 33; the limiting member 38 is used to interfere with the limiting seat 37; preferably, the top of the limiting seat 37 is detachably provided with a limiting protrusion 371, and the bottom of the limiting member 38 is detachably provided with a limiting groove 381, and the limiting protrusion 371 is used to be assembled in the limiting groove 381 to achieve limiting.

[0039] That is, during the downward flipping of the flipping member 32, since the limiting bump 371 is closer to the flipping drive mechanism 33 than the positioning member 34, the limiting bump 371 can be inserted into the limiting groove 381 earlier. Also, when the positioning member 34 just presses the workpiece tightly, the limiting bump 371 has already abutted against the inner top wall of the limiting groove 381 to achieve the limiting effect, which can effectively prevent the flipping member 32 from pressing down further. In this embodiment, both the limiting bump 371 and the limiting groove 381 are detachable structures, which allows the staff to replace the limiting bump 371 and the limiting groove 381 according to the thickness of the workpiece to achieve the effect of accurate limiting. Of course, in order to further avoid damaging the workpiece, a gasket 341 is provided on the top of the positioning member 34 in this embodiment. The gasket 341 is used to play a buffering role to prevent the workpiece from coming into rigid contact with the positioning member 34 and deforming. Specifically, the staff can also make the workpiece better contact and position with the gasket 341 by replacing the gasket 341 according to the shape and thickness of the workpiece.

[0040] In this embodiment, the movable positioning unit 2 includes a base 21, a first clamping member 22, a second clamping member 23, and a first drive mechanism (not shown in the figure) for driving the base 21 to move. The first clamping member 22 is disposed on the base 21. The second clamping member 23 is rotatably disposed on the base 21. The first clamping member 22 is located directly below the second clamping member 23, and the first clamping member 22 and the second clamping member 23 are disposed opposite to each other. The base 21 is provided with a second drive mechanism 25 for driving the second clamping member 23 to flip.

[0041] The first drive mechanism of the present invention is preferably a robot. The base 21 is provided with a mounting flange 211, that is, the end of the robot is connected to the mounting flange 211 of the base 21. When the present invention works, first, the first drive mechanism drives the base 21 to move to a position close to the workpiece. At this time, the first clamping member 22 and the second clamping member 23 are respectively located below and above the workpiece. Then, the first drive mechanism drives the base 21 to drive the first clamping member 22 to move up to abut against the bottom of the workpiece, and then the second drive mechanism 25 drives the second clamping member 23 to flip and abut against the top of the workpiece, thereby achieving the effect of clamping and positioning. Compared with the prior art, the present invention can be disposed outside the workbench, that is, it only moves into the workbench to clamp the workpiece when needed, and can perform clamping and positioning after other fixed positioning units 3 clamp the workpiece first, thus avoiding interfering with other jigs and affecting the positioning effect.

[0042] Specifically, part of the structures of the first clamping member 22 and the second clamping member 23 in this embodiment are substantially the same, and the same parts are as follows: Taking the second clamping member 23 as an example, the second clamping member 23 includes a second clamping seat 26 and a second clamping rod 27. The second clamping seat 26 is rotatably arranged on the base 21. One end of the second clamping rod 27 is installed on the second clamping seat 26, and the other end of the second clamping rod 27 is provided with a second abutting head 28 for abutting against the workpiece. The second abutting head 28 points to the first clamping member 22. The other end of the second clamping rod 27 is bent towards the direction close to the first clamping member 22 to form a second mounting portion 29, and the second abutting head 28 is detachably installed on the second mounting portion 29. That is, the second clamping rod 27 is used to increase the length of the present invention, so that the base 21 can clamp the workpiece without extending into the workbench, and the second clamping rod 27 can be used to reduce the space occupied by the clamping action and avoid interference with other fixtures when extending into the workbench.

[0043] In addition to the above components, the second clamping member 23 also includes components different from those of the first clamping member 22, which are specifically as follows:

[0044] The second mounting portion 29 is detachably provided with an extension rod 291, and the second contact head is installed on the extension rod 291, so that the second clamping seat 26 of the second clamping member 23 can be in a relatively high position to clamp the workpiece, avoiding interference with the surrounding fixtures. In addition, the second clamping seat 26 includes a rotating portion 261 and a connecting portion 262. The rotating portion 261 and the connecting portion 262 are arranged at an obtuse angle. The rotating portion 261 is rotatably connected to the base 21, and the second clamping rod 27 is installed on the connecting portion 262. The output end of the second driving mechanism 25 is connected to the connection part between the rotating portion 261 and the connecting portion 262. The rotating portion 261 and the connecting portion 262 are arranged at an obtuse angle, which is beneficial to saving the space required for the second clamping member 23 to flip, thereby further avoiding interference with other surrounding fixtures.

[0045] To improve the safety of the present invention, an elastic auxiliary member 263 is further arranged between the base 21 and the rotating portion 261. The elastic auxiliary member 263 is used for buffering when the second clamping seat 26 flips. The elastic auxiliary member 263 is used to provide a resisting force for the second clamping seat 26 when the second clamping member 23 flips, so that the flipping speed of the second clamping seat 26 becomes slower, avoiding clamping the workpiece too fast or colliding with other fixtures.

[0046] In this embodiment, the second driving mechanism 25 includes a driving motor 251, a transmission mechanism 252, and a connecting mechanism 253 connected to the second clamping member 23. The driving motor 251 and the transmission mechanism 252 are both installed on the base 21. The driving motor 251 is used to drive the second clamping member 23 to flip through the transmission mechanism 252. The transmission mechanism 252 includes a transmission belt assembly 254 and a speed reducer 255. The driving motor 251 is connected to the input end of the speed reducer 255 through the transmission belt assembly 254. The output end of the speed reducer 255 is rotatably connected to the middle of the second clamping member 23 and is used to drive the second clamping member 23 to flip. That is, the second driving mechanism 25 of the present invention is driven by the driving motor 251, and then the transmission belt assembly 254 is used for transmission to drive the input end of the speed reducer 255 to rotate. The speed reducer 255 changes the rotation into forward and backward movement. Since the rotating part 261 of the second clamping seat 26 is rotatably connected to the base 21, the speed reducer 255 can pull the second clamping seat 26 forward and backward to drive the second clamping seat 26 to flip, so as to realize the clamping and loosening actions.

[0047] Specifically, the speed reducer 255 is rotatably arranged on the base 21, and the rotation direction is perpendicular to the transmission direction of the transmission mechanism 252, so that the staff can adjust the angle of the speed reducer 255 according to the thickness of the workpiece, thereby adjusting the flipping stroke of the second clamping member 23.

[0048] In this embodiment, the machine body 1 includes a movable unit 4 and a fixed unit 5. The movable unit 4 includes a main body 41 and a plurality of wheels 42 arranged at the bottom of the main body 41. A number of fixed positioning units 3 are arranged on the top of the main body 41. The fixed unit 5 includes a base 51 and a number of jacking mechanisms 52 arranged on the base 51. The jacking mechanism 52 is used to jack up the main body 41 after the main body 41 moves directly above the base 51, so that the wheels 42 are suspended to achieve the positioning effect of the main body 41.

[0049] That is, the working process of the machine body 1 is as follows: First, the movable unit 4 moves to the component feeding mechanism of the corresponding workpiece. The feeding mechanism is a device for feeding the components of the workpiece from the outside. The moving mode can be that the staff pulls the handle 6 on the machine body 1, or a driving mechanism (not shown in the figure) for driving the wheels 42 is arranged on the machine body 1. Then, the components of the workpiece are fixed on the fixed positioning unit 3, and then the movable unit 4 is moved to the fixed unit 5 again, specifically moved directly above the base 51, and then the main body 41 is jacked up by the jacking mechanism 52 so that the main body 41 is suspended, so as to achieve the effect that the main body 41 will not displace by itself. Then, the movable positioning unit 2 extends into the top of the machine body 1 for positioning, and finally the subsequent welding is carried out.

[0050] Specifically, a plurality of transition mechanisms 43 are further provided at the bottom of the main body 41, and the plurality of transition mechanisms 43 are distributed in two rows on the main body 41; the transition mechanism 43 includes a connecting seat 44, a first transition wheel 45 and a second transition wheel 46, the connecting seat 44 is installed at the bottom of the main body 41, the first transition wheel 45 is rotatably arranged at the bottom of the connecting seat 44, the second transition wheel 46 is rotatably arranged on one side of the connecting seat 44, and the two rows of second transition wheels 46 are back to back to each other; the base 51 is provided with two first slideways 53, and the two first slideways 53 are respectively used to contact with the two rows of first transition wheels 45; the lifting mechanism 52 includes a lifting seat 54 and a lifting cylinder 55 installed on the lifting seat 54, the lifting seat 54 is arranged on the base 51, and the piston rod of the lifting cylinder 55 is provided with a contact member (not shown in the figure); the side wall of the lifting seat 54 is provided with a second slideway 56 for contacting with the second transition wheel 46.

[0051] The transition mechanism 43 is used to achieve positioning when the machine body 1 moves to the top of the base 51. Specifically, when the main body 41 gradually blocks the top of the base 51, the first transition wheel 45 will slide on the first slide 53, and the second transition wheel 46 will slide along the second slide 56. At this time, if the main body 41 and the base 51 are slightly misaligned, the transition mechanism 43 can also correct it, thereby ensuring the accuracy of the position of the main body 41, so as to ensure that the active positioning device will not collide with the fixed positioning device when it extends into the gap between the fixed positioning devices. Specifically, in order to further enhance the guiding effect on the main body 41, a guide portion 57 is provided at one end of the second slide 56. The guide portion 57 is arranged at an angle with the second slide 56 to guide the second transition wheel 46.

[0052] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention is disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent changes and modifications made to the above embodiments according to the technology of the present invention are within the scope of the technical solution of the present invention without departing from the content of the technical solution of the present invention.

Claims

1. A positioning device for workpiece welding, characterized in that: It comprises a body and a plurality of movable positioning units all arranged on the periphery of the body, and the body is provided with a plurality of fixed positioning units; When in use, the workpiece is mounted on a plurality of fixed positioning units for fixation, and then the movable positioning unit extends into the machine body and further fixes the workpiece; The fixed positioning unit comprises a fixed seat, a flipping member and a flipping driving mechanism, wherein a plurality of positioning members are arranged at intervals on the top of the fixed seat, a pressing member having the same number as the positioning members is arranged on the bottom of the flipping member, and a limiting mechanism is arranged between the flipping driving mechanism and the flipping member; When in use, the various parts of the workpiece are placed on different fixed positioning units, and the workpiece is supported by a plurality of positioning members. Then, the flipping driving mechanism drives the flipping member to flip so that the pressing member presses down the top of the workpiece, and the position of the pressing member is set in one-to-one correspondence with the position of the positioning member. The limiting mechanism is used to prevent the pressing member from pressing down too deep. The limiting mechanism comprises a limiting seat and a limiting member, wherein the limiting seat is arranged at one side of the flip driving mechanism, the flip member is arranged at the end of the flip driving mechanism, the limiting member is arranged at the flip member, and the limiting member is located between the positioning member and the flip driving mechanism; the limiting member is used to interfere with the limiting seat; The top of the limit seat is detachably provided with a limit protrusion, and the bottom of the limit member is detachably provided with a limit groove, and the limit protrusion is used to be assembled in the limit groove to achieve limit; During the downward flipping of the flipping member, the limiting protrusion is closer to the flipping driving mechanism than the positioning member, so that the limiting protrusion is inserted into the limiting groove earlier, and when the positioning member just presses the workpiece, the limiting protrusion has already abutted against the inner top wall of the limiting groove to achieve the limit position; the limiting protrusion and the limiting groove are both detachable structures; The movable positioning unit comprises a base, a first clamping member, a second clamping member and a first driving mechanism for driving the base to move, wherein the first clamping member is arranged on the base, the second clamping member is rotatably arranged on the base, the first clamping member is located directly below the second clamping member, and the first clamping member and the second clamping member are arranged directly opposite to each other; the base is provided with a second driving mechanism for driving the second clamping member to flip; The first clamping member and the second clamping member have the same structure; The second clamping member comprises a second clamping seat and a second clamping rod, wherein the second clamping seat is rotatably arranged on the base, one end of the second clamping rod is mounted on the second clamping seat, and the other end of the second clamping rod is provided with a second abutting head for abutting against a workpiece, and the second abutting head points to the first clamping member; the other end of the second clamping rod is bent toward a direction close to the first clamping member to form a second mounting portion, and the second abutting head is detachably mounted on the second mounting portion; The second clamping rod is used to increase the length so that the base can clamp the workpiece without extending into the workbench; The second clamping seat comprises a rotating part and a connecting part, the rotating part and the connecting part are arranged at an obtuse angle, the rotating part is rotatably connected to the base, and the second clamping rod is installed on the connecting part; the output end of the second driving mechanism is connected to the connection between the rotating part and the connecting part; The second mounting portion is detachably provided with an extension rod, and the second contact is installed on the extension rod, so that the second clamping seat of the second clamping member can be placed in a higher position to clamp the workpiece, thereby avoiding interference with surrounding clamps; in addition, the second clamping seat includes a rotating portion and a connecting portion, the rotating portion and the connecting portion are arranged at an obtuse angle, the rotating portion is rotatably connected to the base, and the second clamping rod is installed on the connecting portion; the output end of the second driving mechanism is connected to the connection between the rotating portion and the connecting portion, and the rotating portion and the connecting portion are arranged at an obtuse angle, which is conducive to saving the space required when the second clamping member is turned over, thereby further avoiding interference with other surrounding clamps; An elastic auxiliary member is also provided between the base and the rotating part, and the elastic auxiliary member is used for buffering when the second clamping seat turns over; The machine body includes a movable unit and a fixed unit, the movable unit includes a main body and a plurality of wheels arranged at the bottom of the main body, a plurality of fixed positioning units are arranged at the top of the main body, and the fixed unit includes a base and a plurality of jacking mechanisms arranged at the base; The lifting mechanism is used to lift up the main body after the main body moves to the top of the base so that the wheels are suspended in the air to achieve the positioning effect of the main body; When the machine body is working, the movable unit first moves to the corresponding workpiece component loading mechanism, which is a device specially used for loading the workpiece components from the outside; then the components of the workpiece are fixed on the fixed positioning unit, and then the movable unit is moved back to the fixed unit, specifically to the top of the base, and then the main body is lifted by the lifting mechanism so that the main body is suspended, thereby achieving the effect of preventing the main body from moving by itself; then the movable positioning unit extends into the top of the machine body for positioning, and finally subsequent welding is carried out.

2. The positioning device for workpiece welding according to claim 1, wherein: A gasket is arranged on the top of the positioning piece.

3. The positioning device for workpiece welding according to claim 1, wherein: The second driving mechanism comprises a driving motor, a transmission mechanism and a connection mechanism connected to the second clamping member, the driving motor and the transmission mechanism are both installed on the base, and the driving motor is used to drive the second clamping member to flip through the transmission mechanism; The transmission mechanism includes a transmission belt assembly and a reducer, the driving motor is connected to the input end of the reducer through the transmission belt assembly, and the output end of the reducer is rotatably connected to the middle part of the second clamping member and is used to drive the second clamping member to flip; The reducer is rotatably arranged on the base.

4. The positioning device for workpiece welding according to claim 1, characterized in that: A plurality of transition mechanisms are further provided at the bottom of the main body, and the plurality of transition mechanisms are distributed in two rows on the main body; the transition mechanism includes a connecting seat, a first transition wheel, and a second transition wheel. The connecting seat is installed at the bottom of the main body, the first transition wheel is rotatably arranged at the bottom of the connecting seat, the second transition wheel is rotatably arranged on one side of the connecting seat, and the two rows of second transition wheels face away from each other. The base is provided with two first sliding grooves, and the two first sliding grooves are respectively used to abut against the two rows of first transition wheels; the jacking mechanism includes a jacking seat and a jacking oil cylinder installed on the jacking seat. The jacking seat is arranged on the base, and a abutting member is arranged on the piston rod of the jacking oil cylinder; a second sliding groove for abutting against the second transition wheel is arranged on the side wall of the jacking seat.

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