CN214024263U

CN214024263U - Welding fixture

Info

Publication number: CN214024263U
Application number: CN202022444797.8U
Authority: CN
Inventors: 陈岩; 胡钊洪; 黄春喜
Original assignee: Guangdong Foday Automobile Co Ltd
Current assignee: Guangdong Foday Automobile Co Ltd
Priority date: 2020-10-28
Filing date: 2020-10-28
Publication date: 2021-08-24
Anticipated expiration: 2030-10-28

Abstract

The utility model discloses a welding jig relates to the automobile processing field. The welding jig includes: the supporting platform comprises a bottom frame, a working platform and a plurality of supporting columns, one side of the working platform is fixed with one side of the bottom frame, and a fixed included angle is formed between the working platform and the bottom frame; the support column interval sets up between work platform and underframe, and the opposite side of work platform, the opposite side of underframe are connected respectively to the both ends of support column. The positioning mechanism comprises a positioning driving piece and a first positioning piece, the positioning driving piece is used for driving the first positioning piece to move to a preset position of the working platform, and the first positioning piece is matched with a positioning structure of a workpiece. The first clamp is arranged along the edge of the working platform; the first clamp is used for clamping a workpiece; the control part is electrically connected with the positioning driving part and the first clamp. By the mode, the space in which the mechanical welding arms can be placed can be increased, so that the workpieces can be welded by the mechanical welding arms at the same time, and the welding efficiency is improved.

Description

Welding fixture

Technical Field

The utility model relates to an automobile processing field especially relates to a welding jig.

Background

When a workpiece is machined, a clamp is usually required to clamp the workpiece so as to fix the workpiece, so that displacement does not occur in the machining process. However, with the development of society, parts on workpieces are more and more, and the parts are relatively close to each other, such as automobile bodies. At this time, since the space above the workpiece is limited, when welding is performed using a mechanized apparatus, welding is performed only by a single spot, and thus welding efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the welding fixture is provided, and the welding efficiency can be improved.

According to the utility model discloses welding jig, including brace table, positioning mechanism, a plurality of first anchor clamps and control unit.

The supporting platform comprises a bottom frame, a working platform and a plurality of supporting columns, one side of the working platform is fixed with one side of the bottom frame, and a fixed included angle is formed between the working platform and the bottom frame; the support columns are arranged between the working platform and the bottom frame at intervals, and two ends of each support column are connected with the other side of the working platform and the other side of the bottom frame respectively.

The positioning mechanism comprises a positioning driving piece and a first positioning piece, the positioning driving piece is used for driving the first positioning piece to move to the preset position of the working platform, and the first positioning piece is matched with a positioning structure of a workpiece located on the preset position.

The first clamp is arranged along the edge of the working platform; the first clamp is used for clamping the workpiece; the control part is electrically connected with the positioning driving part and the first clamp.

According to the utility model discloses an above-mentioned embodiment has following beneficial effect at least: the positioning structures on the first positioning piece workpiece are matched, so that the accuracy of the position where the workpiece is placed can be guaranteed. At this time, since the work table is disposed obliquely with respect to the base frame, the workpiece is obliquely fixed when the workpiece is clamped on the work table by the first clamp. At this moment, the space that mechanical welding arm can put is bigger to make a plurality of mechanical welding arms weld the work piece simultaneously, thereby promote welded efficiency.

According to some embodiments of the present invention, the first clamp comprises a first mounting seat, a first clamping portion, a first clamping driving member, and a second positioning member, the first mounting seat is disposed on the working platform; the first clamping part is arranged on the first mounting seat; the second positioning piece is arranged on the first clamping part; the first clamping driving piece is used for driving the first clamping part to be opened or closed so as to clamp the workpiece; the control component is electrically connected with the first clamping driving piece. Through setting up the second setting element, can pass through the multiple spot location with large-scale part in order to guarantee the centre gripping after fixed, the fixed position of work piece is unanimous with expecting.

According to some embodiments of the present invention, the first positioning member and the second positioning member each include a positioning pin accommodating structure, a positioning pin and an inductor, the positioning pin accommodating structure is provided with a cavity having an opening at one end, and a through hole is provided at a side of the positioning pin accommodating structure close to the opening and communicated with the cavity; the inductor is arranged on the through hole; the main body of the positioning pin is arranged in the cavity, and an accommodating structure matched with the positioning structure of the workpiece is formed on the positioning pin and the cavity wall of the cavity; the control component is electrically connected with the inductor. Whether a positioning structure is sleeved on the induction positioning pin of the inductor or not is used for quickly determining the positioning result.

According to some embodiments of the invention, the first clamping portion comprises an upper clamping portion and a lower clamping portion, the upper clamping portion comprising a radial arm and a plurality of first clamping blocks; the first clamping block is arranged at the lower end of the spiral arm; the lower clamping part is fixedly arranged on the first mounting seat; the lower clamping part comprises a second clamping block and a rotary supporting piece, and the second clamping block corresponds to the first clamping block one to one; the rotary arm is rotationally connected with the rotary supporting piece; the first clamping driving piece is connected with the rotating arm and used for driving the rotating arm to rotate around the rotating supporting piece, so that the first clamping block is far away from or close to the second clamping block.

According to some embodiments of the invention, the first clamp further comprises a handle, the handle being disposed on the radial arm. Through setting up the handle, can carry out manual operation to last clamping part to make the second setting element can aim at the location structure on the work piece.

According to some embodiments of the invention, the first clamping block and the second clamping block are both arranged in a cylindrical or L-shaped configuration.

According to some embodiments of the present invention, the welding jig further comprises a plurality of second jigs, the second jigs comprise second mounting seats, second clamping portions and second clamping driving members, the second mounting seats are disposed on the working platform; the second clamping part is arranged on the second mounting seat, and the second clamping driving part drives the second clamping part to be opened or closed so as to clamp the workpiece; the second clamp and the first clamp are arranged at intervals. Through setting up a plurality of second anchor clamps, can make the work piece more firm fix on work platform.

According to some embodiments of the invention, the second clamping portion is of the same structure as the first clamping portion; first centre gripping driving piece with second centre gripping driving piece all includes pivot, cylinder connecting piece, cylinder, the cylinder passes through the cylinder connecting piece with the both ends of pivot are connected, the pivot is passed the spiral arm with the cylinder connecting piece is connected.

According to some embodiments of the present invention, the first clamping driving member and the second clamping driving member are provided with cylinder protection fences at outer sides thereof, and the cylinder protection fence of the first clamping driving member is connected to the first mounting seat; and the cylinder protection fence of the second clamping driving piece is connected with the second mounting seat. The cylinder can be protected from being damaged by arranging the cylinder protection fence.

According to some embodiments of the present invention, the welding jig further comprises: and the trundles are arranged at the bottom of the bottom frame.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a structural diagram of a welding fixture according to an embodiment of the present invention;

fig. 2 is a partial enlarged view a of an embodiment of the present invention.

Reference numerals:

a support table 100, a bottom frame 110, a working platform 120, a support column 130, a caster 140,

A positioning mechanism 200, a positioning driving member 210, a first positioning member 220,

The clamping device comprises a first clamp 300, a first mounting seat 310, a first clamping part 320, an upper clamping part 321, a rotary arm 3211, a first clamping block 3212, a lower clamping part 322, a second clamping block 3221, a rotary support 3222, a first clamping driving part 330, a rotary shaft 331, an air cylinder connecting part 332, an air cylinder 333, an air cylinder protective fence 334, a second positioning part 340, a positioning pin accommodating structure 341, a positioning pin 342, an inductor 343, a handle 350, a first clamping part 3211, a second clamping part 3221, an air cylinder connecting part 332, an air cylinder 333, an air cylinder protective fence 334, a second positioning part 340, a positioning pin accommodating structure 341, a positioning pin 342, a sensor 343, a handle 350, a second clamping part, a clamping part 3222, a clamping part,

A second clamp 400, a second mounting seat 410, a second clamping part 420 and a second clamping driving part 430.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. If several are described, several means one or more than one; if the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

The welding jig of the present invention is described below with reference to fig. 1 and 2.

According to the embodiment of the present invention, as shown in fig. 1, the welding jig includes a supporting table 100, a positioning mechanism 200, a plurality of first jigs 300, and a control unit.

The support table 100 comprises a bottom frame 110, a working platform 120 and a plurality of support columns 130, wherein one side of the working platform 120 is fixed with one side of the bottom frame 110, and a fixed included angle is formed between the working platform 120 and the bottom frame 110; the supporting columns 130 are disposed between the working platform 120 and the bottom frame 110 at intervals, and two ends of the supporting columns 130 are respectively connected to the other side of the working platform 120 and the other side of the bottom frame 110.

It should be understood that the supporting columns 130, the bottom frame 110 and the work platform 120 may form a triangular structure, which may enhance the supporting force of the work platform 120. The mode that adopts the interval to set up can practice thrift welding jig's material, reduces the cost of anchor clamps.

The positioning mechanism 200 includes a positioning driving member 210 and a first positioning member 220, the positioning driving member 210 is used for driving the first positioning member 220 to move to a preset position of the working platform 120, and the first positioning member 220 is matched with a positioning structure of a workpiece located at the preset position.

It should be understood that when the workpiece is machined, the position of the workpiece on the fixture must be fixed, so that the positioning mechanism 200 needs to cooperate with a positioning structure for positioning reference on the workpiece, so as to ensure the accuracy of the position where the workpiece is placed.

The first clamp 300 is disposed along the edge of the work platform 120; the first clamp 300 is used for clamping a workpiece; the control part is electrically connected with the positioning driver 210 and the first clamp 300.

Therefore, the first positioning member 220 is matched with the positioning structure on the workpiece, so that the accuracy of the position where the workpiece is placed is ensured. At this time, since the work platform 120 is obliquely disposed with respect to the base frame 110, when the workpiece is clamped to the work platform 120 by the first clamp 300, the workpiece is obliquely fixed. At this moment, the space that mechanical welding arm can put is bigger to make a plurality of mechanical welding arms weld the work piece simultaneously, thereby promote welded efficiency.

In some embodiments, as shown in fig. 2, the first clamp 300 includes a first mounting seat 310, a first clamping portion 320, a first clamping driving member 330, and a second positioning member 340, the first mounting seat 310 being disposed on the work platform 120; the first clamping part 320 is disposed on the first mounting seat 310; the second positioning member 340 is disposed on the first clamping portion 320; the first clamping driving member 330 is used for driving the first clamping part 320 to open or close so as to clamp the workpiece; the control component is electrically connected to the first clamp drive 330. By arranging the second positioning part 340, large-sized parts can be positioned at multiple points to ensure that the fixed position of the workpiece is consistent with the expected position after clamping and fixing.

In some embodiments, as shown in fig. 2, each of the first positioning element 220 and the second positioning element 340 includes a positioning pin accommodating structure 341, a positioning pin 342, and an inductor 343, the positioning pin accommodating structure 341 has a cavity with an opening at one end, and a through hole is formed at a side of the positioning pin accommodating structure 341 close to the opening, and the through hole is communicated with the cavity; the inductor 343 is disposed on the through hole; the main body of the positioning pin 342 is disposed in the cavity, an accommodating structure matched with the positioning structure of the workpiece is formed between the main body of the positioning pin 342 and the cavity wall of the cavity, and the control component is electrically connected with the sensor 343. Whether a positioning structure is sleeved on the sensing positioning pin 342 of the sensor 343 can quickly determine the positioning result.

It will be appreciated that a plurality of locating formations are provided on the workpiece. In some embodiments, the locating structure is provided as a nut, and in other embodiments, as a groove.

It should be understood that when the positioning structure is sleeved on the positioning pin 342 from one end of the opening of the cavity, the sensor 343 can detect whether there is a positioning structure in the cavity. It should be understood that the sensor 343 may be a displacement sensor or an opto-electronic switch.

In some embodiments, as shown in fig. 2, the first clamping portion 320 includes an upper clamping portion 321, a lower clamping portion 322, the upper clamping portion 321 includes a radial arm 3211 and a plurality of first clamping blocks 3212; the first clamping block 3212 is arranged at the lower end of the rotary arm 3211; the lower clamping portion 322 is fixedly disposed on the first mounting seat 310; the lower clamping portion 322 includes a second clamping block 3221 and a rotary supporting member 3222, and the second clamping blocks 3221 correspond to the first clamping blocks 3212 one to one; the rotary arm 3211 is rotatably connected with the rotary support 3222; the first clamping driving member 330 is connected to the rotating arm 3211, and the first clamping driving member 330 is used to drive the rotating arm 3211 to rotate around the rotating support 3222, so that the first clamping block 3212 moves away from or moves close to the second clamping block 3221.

In some embodiments, as shown in fig. 2, the first clamp 300 further includes a handle 350, the handle 350 being disposed on the radial arm 3211. By providing the handle 350, the upper clamping portion 321 can be manually operated, such that the second positioning member 340 can be aligned with a positioning structure on a workpiece.

As shown in fig. 1, in some embodiments, the first and second clamping blocks 3212, 3221 are provided in a cylindrical shape; in other embodiments, L-shaped; in other embodiments, some of the first clamping blocks 3212 and the second clamping blocks 3221 of the same first clamp 300 are arranged in a cylindrical shape, and other of the first clamping blocks 3212 and the second clamping blocks 3221 are arranged in an L-shape.

In some embodiments, as shown in fig. 1, the welding fixture further includes a plurality of second fixtures 400, the second fixtures 400 include a second mounting seat 410, a second clamping portion 420, and a second clamping driving member 430, the second mounting seat 410 is disposed on the work platform 120; the second clamping part 420 is arranged on the second mounting seat 410, and the second clamping driving part 430 drives the second clamping part 420 to open or close so as to clamp the workpiece; the second jig 400 is spaced apart from the first jig 300. By providing a plurality of second clamps 400, the workpiece can be more stably fixed on the work platform 120.

In some embodiments, second clip portion 420 is identical in structure to first clip portion 320; the first clamping driving member 330 and the second clamping driving member 430 each include a rotation shaft 331, an air cylinder connector 332, and an air cylinder 333, the air cylinder 333 is connected to two ends of the rotation shaft 331 through the air cylinder connector 332, and the rotation shaft 331 passes through the swing arm 3211 and is connected to the air cylinder connector 332.

In some embodiments, an air cylinder guard fence 334 is disposed on the outer side of each of the first and second clamp drives 330 and 430, and the air cylinder guard fence 334 of the first clamp drive 330 is connected to the first mounting seat 310; the cylinder guard rail 334 of the second clamp actuator 430 is coupled to the second mounting block 410. The cylinder 333 can be protected from damage by providing a cylinder guard rail 334.

In some embodiments, the welding jig further comprises a plurality of casters 140, the casters 140 being disposed at the bottom of the base frame 110.

The welding jig of the present invention will be described in detail in a specific embodiment with reference to fig. 1 and 2. It is to be understood that the following description is illustrative only and is not intended as a specific limitation on the invention.

Specifically, the support table 100 includes a bottom frame 110, a work platform 120, and a plurality of support pillars 130, wherein one side of the work platform 120 is fixed to one side of the bottom frame 110, and a fixed included angle is formed between the work platform 120 and the bottom frame 110; the supporting columns 130 are disposed between the working platform 120 and the bottom frame 110 at intervals, and two ends of the supporting columns 130 are respectively connected to the other side of the working platform 120 and the other side of the bottom frame 110.

Specifically, the supporting column 130, the bottom frame 110 and the working platform 120 may form a triangular structure, which may enhance the supporting force of the working platform 120.

Specifically, the positioning mechanism 200 includes a positioning driving member 210 and a first positioning member 220, the positioning driving member 210 is used for driving the first positioning member 220 to move to a preset position of the working platform 120, and the first positioning member 220 is matched with a positioning structure of a workpiece located at the preset position.

Specifically, the first clamp 300 is disposed along the edge of the working platform 120; the first positioning member 220 is used to determine an initial position where the workpiece is placed so that the first jig 300 can hold the workpiece.

Further, as shown in fig. 2, the first fixture 300 includes a first mounting seat 310, a first clamping portion 320, a first clamping driving member 330, and a second positioning member 340, wherein the first mounting seat 310 is disposed on the working platform 120; the first clamping part 320 is disposed on the first mounting seat 310; the second positioning member 340 is disposed on the first clamping portion 320; the first clamping driving member 330 is used for driving the first clamping part 320 to open or close so as to clamp the workpiece; the control component is electrically connected to the first clamp drive 330.

Further, as shown in fig. 2, each of the first positioning element 220 and the second positioning element 340 includes a positioning pin accommodating structure 341, a positioning pin 342, and an inductor 343, the positioning pin accommodating structure 341 has a cavity with an opening at one end, and a through hole is formed at a side of the positioning pin accommodating structure 341 close to the opening, and the through hole is communicated with the cavity; the inductor 343 is disposed on the through hole; the main body of the positioning pin 342 is disposed in the cavity, an accommodating structure matched with the positioning structure of the workpiece is formed between the main body of the positioning pin 342 and the cavity wall of the cavity, and the control component is electrically connected with the sensor 343.

Further, as shown in fig. 2, the first clamping portion 320 includes an upper clamping portion 321 and a lower clamping portion 322, the upper clamping portion 321 includes a rotating arm 3211 and a plurality of first clamping blocks 3212; the first clamping block 3212 is arranged at the lower end of the rotary arm 3211; the lower clamping portion 322 is fixedly disposed on the first mounting seat 310; the lower clamping portion 322 includes a second clamping block 3221 and a rotary supporting member 3222, and the second clamping blocks 3221 correspond to the first clamping blocks 3212 one to one; the rotary arm 3211 is rotatably connected with the rotary support 3222; the first clamping driving member 330 is connected to the rotating arm 3211, and the first clamping driving member 330 is used to drive the rotating arm 3211 to rotate around the rotating support 3222, so that the first clamping block 3212 moves away from or moves close to the second clamping block 3221.

Further, as shown in fig. 2, the first clamp 300 further includes a handle 350, and the handle 350 is disposed on the radial arm 3211.

As shown in fig. 1, some of the first clamping blocks 3212 and the second clamping blocks 3221 are arranged in a cylindrical shape, and some of the first clamping blocks 3212 and the second clamping blocks 3221 are L-shaped.

Further, as shown in fig. 1, the welding fixture further includes a plurality of second fixtures 400, each second fixture 400 includes a second mounting seat 410, a second clamping portion 420, and a second clamping driving member 430, and the second mounting seat 410 is disposed on the working platform 120; the second clamping part 420 is arranged on the second mounting seat 410, and the second clamping driving part 430 drives the second clamping part 420 to open or close so as to clamp the workpiece; the second jig 400 is spaced apart from the first jig 300.

Further, the second clamping portion 420 has the same structure as the first clamping portion 320; the first clamping driving member 330 and the second clamping driving member 430 each include a rotation shaft 331, an air cylinder connector 332, and an air cylinder 333, the air cylinder 333 is connected to two ends of the rotation shaft 331 through the air cylinder connector 332, and the rotation shaft 331 passes through the swing arm 3211 and is connected to the air cylinder connector 332.

Further, the outer sides of the first clamping driving member 330 and the second clamping driving member 430 are both provided with an air cylinder protection fence 334, and the air cylinder protection fence 334 of the first clamping driving member 330 is connected with the first mounting seat 310; the cylinder guard rail 334 of the second clamp actuator 430 is coupled to the second mounting block 410.

Further, the welding jig further includes a plurality of casters 140, and the casters 140 are disposed at the bottom of the base frame 110.

Specifically, the control unit is electrically connected to the positioning driving unit 210, the first clamping driving unit 330, the second clamping driving unit 430, and the sensor 343.

During operation, the control unit drives the first clamping driving member 330 and the second clamping driving member 430 to open the first clamping portion 320 and the second clamping portion 420, respectively, and the control unit drives the positioning driving member 210 to move the first positioning member 220 to a predetermined position. At this time, the positioning structure of the workpiece is sleeved on the positioning pin 342 of the first positioning member 220, meanwhile, the rotating arm of the first clamping portion 320 is controlled to move downwards through the handle 350, and meanwhile, the workpiece is adjusted according to the position of the second positioning member 340 on the first clamping portion 320, so that the positioning structure of the workpiece is sleeved on the positioning pin 342 of the first positioning member 220 and the positioning pin 342 of the second positioning member 340, at this time, the control part receives the result of the sensor 343 and judges that the position is fixed, and at this time, the control part controls the second clamping driving member 430 to drive, so that the second clamping portion 420 is closed.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. A welding fixture, comprising:

the supporting platform comprises a bottom frame, a working platform and a plurality of supporting columns, one side of the working platform is fixed with one side of the bottom frame, and a fixed included angle is formed between the working platform and the bottom frame; the supporting columns are arranged between the working platform and the bottom frame at intervals, and two ends of each supporting column are respectively connected with the other side of the working platform and the other side of the bottom frame;

the positioning mechanism comprises a positioning driving piece and a first positioning piece, the positioning driving piece is used for driving the first positioning piece to move to a preset position of the working platform, and the first positioning piece is matched with a positioning structure of a workpiece positioned on the preset position;

the first clamps are arranged along the edge of the working platform; the first clamp is used for clamping the workpiece;

the control component is electrically connected with the positioning driving piece and the first clamp.

2. The welding jig of claim 1,

the first clamp comprises a first mounting seat, a first clamping part, a first clamping driving part and a second positioning part, and the first mounting seat is arranged on the working platform; the first clamping part is arranged on the first mounting seat; the second positioning piece is arranged on the first clamping part; the first clamping driving piece is used for driving the first clamping part to be opened or closed so as to clamp the workpiece; the control component is electrically connected with the first clamping driving piece.

3. The welding jig of claim 2,

the first positioning piece and the second positioning piece respectively comprise a positioning pin accommodating structure, a positioning pin and an inductor, the positioning pin accommodating structure is provided with a cavity with an opening at one end, one side of the positioning pin accommodating structure, which is close to the opening, is provided with a through hole, and the through hole is communicated with the cavity; the inductor is arranged on the through hole; the main body of the positioning pin is arranged in the cavity, an accommodating structure matched with the positioning structure of the workpiece is formed on the main body of the positioning pin and the cavity wall of the cavity, and the control component is electrically connected with the inductor.

4. The welding fixture of claim 2, further comprising:

the first clamping part comprises an upper clamping part and a lower clamping part, and the upper clamping part comprises a rotating arm and a plurality of first clamping blocks; the first clamping block is arranged at the lower end of the spiral arm; the lower clamping part is fixedly arranged on the first mounting seat; the lower clamping part comprises a second clamping block and a rotary supporting piece, and the second clamping block corresponds to the first clamping block one to one; the rotary arm is rotationally connected with the rotary supporting piece; the first clamping driving piece is connected with the rotating arm and used for driving the rotating arm to rotate around the rotating supporting piece, so that the first clamping block is far away from or close to the second clamping block.

5. The welding jig of claim 4,

the first clamp further comprises a handle, and the handle is arranged on the spiral arm.

6. The welding jig of claim 4,

the first clamping block and the second clamping block are both cylindrical or L-shaped.

7. The welding fixture of claim 4, further comprising:

the second clamps comprise second mounting seats, second clamping parts and second clamping driving parts, and the second mounting seats are arranged on the working platform; the second clamping part is arranged on the second mounting seat, and the second clamping driving part drives the second clamping part to be opened or closed so as to clamp the workpiece; the second clamp and the first clamp are arranged at intervals.

8. The welding jig of claim 7,

the second clamping part has the same structure as the first clamping part; first centre gripping driving piece with second centre gripping driving piece all includes pivot, cylinder connecting piece, cylinder, the cylinder passes through the cylinder connecting piece with the both ends of pivot are connected, the pivot is passed the spiral arm with the cylinder connecting piece is connected.

9. The welding jig of claim 8,

air cylinder protection fences are arranged on the outer sides of the first clamping driving piece and the second clamping driving piece, and the air cylinder protection fences of the first clamping driving piece are connected with the first mounting seat; and the cylinder protection fence of the second clamping driving piece is connected with the second mounting seat.

10. The welding fixture of claim 1, further comprising:

and the trundles are arranged at the bottom of the bottom frame.