CN222903015U - A welding fixture for automobile seat shaft support - Google Patents

Abstract

The application discloses a welding jig for a rotating shaft support of an automobile seat, which relates to the technical field of automobile part production equipment and comprises an operation table, wherein a first positioning component, a pressing component, a second positioning component and a centering device are arranged on the operation table, the second positioning component comprises a reference piece which can be overturned above the first positioning component, the centering device comprises a third positioning component and a fourth positioning component which are symmetrically arranged on two sides of the first positioning component, the third positioning component comprises a first positioning part and a first butting piece, the fourth positioning component comprises a second positioning part and a second butting piece, and when the first positioning part presses a first side plate against the reference piece and the second positioning part presses a second side plate against the reference piece, the first butting piece can move to butt joint with the second butting piece. The welding jig for the automobile seat rotating shaft support can effectively solve the problem that the shaft holes of two groups of side plates of the support are not concentric after being welded.

Description

Welding jig for rotating shaft support of automobile seat

Technical Field

The application relates to the technical field of automobile part production equipment, in particular to a welding jig for a rotating shaft support of an automobile seat.

Background

The support of the automobile seat rotating shaft is formed by welding parts of a bottom plate, a side plate, a stop block and a reinforcing rib through arc welding. Wherein the support is the most important component, and two sets of curb plates of support are opened there is the pivot hole. After the welding of the support is finished, the rotating shaft holes of the two groups of side plates are required to be concentric, so that the rotating precision of the assembled final rotating shaft meets the requirement of the gauge. However, the thickness of each part of the bottom plate reaches 8mm due to the side plates, meanwhile, the welding lines are long and dense, the heating capacity in the arc welding process is large, and the thermal deformation is large. The independent positioning and the compaction of the conventional welding jig cannot guarantee the welding precision, the shaft holes of the two side plates are eccentric easily after welding, the correction cannot be carried out, and batch scrapping is caused.

Disclosure of utility model

The present application aims to solve, at least to some extent, one of the above technical problems in the prior art. Therefore, the embodiment of the application provides the welding jig for the support of the rotating shaft of the automobile seat, which is used for effectively positioning the support in the welding process so as to effectively solve the problem that the shaft holes of two groups of side plates of the support are not concentric after being welded.

According to the welding jig for the rotating shaft support of the automobile seat, which is provided by the embodiment of the application, the welding jig comprises a workbench, wherein a first positioning assembly, a pressing assembly, a second positioning assembly and a centering device are arranged on the workbench, the pressing assembly is used for pressing and positioning a support base plate of the first positioning assembly, the second positioning assembly comprises a reference piece capable of being overturned above the first positioning assembly, one side, opposite to a first side plate and a second side plate, of the support base plate which are well positioned and limited is positioned through the reference piece, the centering device comprises a third positioning assembly and a fourth positioning assembly which are symmetrically arranged on two sides of the first positioning assembly, the third positioning assembly comprises a first positioning part and a first abutting piece, the fourth positioning assembly comprises a second positioning part and a second abutting piece, and when the first positioning part presses the first side plate against the reference piece and the second positioning part presses the second side plate against the reference piece, the first abutting piece used for adapting to the first shaft hole of the first side plate can be matched with the second abutting piece.

According to the welding jig for the rotating shaft support of the automobile seat, the third positioning component comprises the first air cylinder and the driving part, the first butt joint piece is fixed on the air cylinder rod of the first air cylinder, and the driving part is used for driving the air cylinder rod to conduct linear motion so as to adjust the distance between the first butt joint piece and the first side plate.

According to the welding jig for the rotating shaft support of the automobile seat, the driving part comprises a fixing piece, a first connecting rod, a second connecting rod and a third connecting rod, wherein the fixing piece is fixedly connected with the cylinder rod, the first connecting rod is fixedly connected with the first cylinder, the end part of the second connecting rod is hinged with the first connecting rod, one end of the third connecting rod is connected with the fixing piece, and the other end of the third connecting rod is connected with the middle part of the second connecting rod.

According to the welding jig for the rotating shaft support of the automobile seat, the end part of the first butt joint piece is provided with the conical end, the end part of the second butt joint piece is provided with the groove matched with the conical end, and when the first butt joint piece is in butt joint with the second butt joint piece, the conical end is inserted into the groove.

According to the welding jig for the rotating shaft support of the automobile seat, the first positioning part further comprises a first positioning pin, and when the first butt joint piece is inserted into the first shaft hole, the first positioning pin is matched with the first positioning hole of the first side plate.

According to the welding jig for the rotating shaft support of the automobile seat, the second positioning part further comprises a second positioning pin, and when the second butt joint piece is inserted into the second shaft hole, the second positioning pin is matched with the second positioning hole of the second side plate.

According to the welding jig for the rotating shaft support of the automobile seat, the first positioning part further comprises a first cooling piece for releasing air flow, and when the first butt joint piece is butt jointed with the second butt joint piece, the air outlet hole of the first cooling piece is aligned with the joint of the first side plate and the support bottom plate.

According to the welding jig for the rotating shaft support of the automobile seat, the second positioning part further comprises a second cooling piece for releasing air flow, and when the first butt joint piece is butt jointed with the second butt joint piece, the air outlet end of the second cooling piece is aligned to the joint of the second side plate and the support bottom plate.

According to the welding jig for the rotating shaft support of the automobile seat, the fourth positioning assembly comprises the second air cylinder and the driving handle, the second positioning part is fixed on the air cylinder shaft of the second air cylinder, the driving handle is fixedly connected with one end of the air cylinder shaft, and the second positioning part is positioned at the other end of the air cylinder shaft.

According to the welding jig for the rotating shaft support of the automobile seat, the pressing assembly comprises the third air cylinder and the pressing block, the pressing block can be overturned to the upper portion of the first positioning assembly under the action of the third air cylinder, the second positioning assembly comprises the fourth air cylinder, and the fourth air cylinder is used for driving the datum piece to overturne.

The welding jig for the automobile seat rotating shaft support has the advantages that when the welding jig is used, the support bottom plate is positioned on the first positioning assembly, then the support bottom plate is fixed on the first positioning assembly through the pressing assembly, positioning limiting of the support bottom plate is completed, then the second positioning assembly acts, the reference piece is turned over to the upper side of the support bottom plate, the first side plate and the second side plate are manually placed on two sides of the reference piece to be positioned respectively, then the first butt joint piece of the third positioning assembly is adjusted to a first shaft hole to be positioned, the second butt joint piece of the fourth positioning assembly is adjusted to a second shaft hole to be positioned, after the welding jig is completed, the third positioning assembly and the fourth positioning assembly act simultaneously, the first side plate of the first positioning assembly is pressed against one side of the reference piece, the second side plate is pressed against the other side of the reference piece through the second positioning assembly, meanwhile, the first butt joint piece and the second butt joint piece are turned over to be positioned through the reference piece, the concentric positioning of the first side plate and the second butt joint piece, the concentric positioning of the first shaft hole and the second butt joint piece is completed, the concentric positioning of the first butt joint piece and the second butt joint piece is matched with the first positioning portion of the second butt joint piece, the concentric positioning piece can be accurately pressed against the first side plate and the second side plate, and the opposite positioning seat positioning base can be accurately welded, and the two opposite positioning positions of the support can be realized, and the welding jig can be positioned, and the opposite positioning positions of the support can be positioned, and the opposite to the base can be positioned, and can be welded, and can be positioned and accurately by and welded, and positioned and can and positioned.

Drawings

The application is further described below with reference to the drawings and examples;

FIG. 1 is a schematic view of a structure of a seat pivot support for an automobile seat according to an embodiment of the present application;

FIG. 2 is an exploded view of a spindle mount for an automotive seat in accordance with an embodiment of the present application;

FIG. 3 is a schematic diagram of a welding fixture for a spindle support of an automobile seat according to an embodiment of the present application;

FIG. 4 is a second schematic structural view of a welding fixture for a support of a rotating shaft of an automobile seat according to an embodiment of the present application;

fig. 5 is a schematic structural diagram III of a welding jig for a rotating shaft support of an automobile seat in an embodiment of the application;

FIG. 6 is a schematic diagram of a welding fixture for a spindle support of an automobile seat according to an embodiment of the present application;

FIG. 7 is a schematic view of a centering device according to an embodiment of the present application;

FIG. 8 is a schematic view of a fourth positioning assembly according to an embodiment of the present application;

FIG. 9 is a schematic diagram of a third positioning assembly according to an embodiment of the present application;

FIG. 10 is a second schematic structural view of the centering device according to the embodiment of the present application;

FIG. 11 is a schematic diagram of a second positioning assembly according to an embodiment of the present application.

Reference numerals are made to the support 110, the support bottom plate 111, the first side plate 112, the first shaft hole 1121, the first positioning hole 1122, the second side plate 113, the second shaft hole 1131, the second positioning hole 1132, the rotation shaft 120, the work table 200, the first positioning unit 210, the first bump holder 220, the second bump holder 230, the pressing unit 300, the second positioning unit 400, the fourth cylinder 410, the connecting piece 420, the reference piece 430, the bump 431, the third positioning unit 500, the first cylinder 510, the driving part 520, the fixing piece 521, the first link 522, the second link 523, the third link 524, the first positioning part 530, the first positioning pin 531, the first docking piece 532, the tapered part 533, the first cooling piece 534, the air outlet hole 5341, the air inlet hole 5342, the first buffer block 535, the fourth positioning unit 600, the second cylinder 610, the second positioning part 620, the second positioning pin 621, the second docking piece 622, the groove 623, the second buffer block 624, the second cooling piece 625, the air inlet end 6251, the air outlet end 6252, the handle 630.

Detailed Description

Reference will now be made in detail to the present embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present application, but not to limit the scope of the present application.

In the description of the present application, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present application and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.

In the description of the present application, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed 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 application, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present application can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

Referring to fig. 1 and 2, the support of the rotating shaft 120 of the car seat according to the embodiment of the application includes the rotating shaft 120 and the support 110, the support 110 is mainly composed of a support bottom plate 111, a first side plate 112 and a second side plate 113, the first side plate 112 has a first shaft hole 1121 and a first positioning hole 1122, the second side plate 113 has a second shaft hole 1131 and a second positioning hole 1132, the first shaft hole 1121 and the second shaft hole 1131 of the support 110 according to the standard are in a concentric state, but the existing jig cannot effectively ensure that the welded shaft holes are concentric, and thus needs to be improved.

Referring to fig. 3 to 11, an embodiment of the present application provides a welding fixture for a rotating shaft support of an automobile seat, specifically including a working table 200, on which a first positioning assembly 210, a pressing assembly 300, a second positioning assembly 400 and a centering device are disposed, the pressing assembly 300 is used for pressing and positioning a support base plate 111 of the first positioning assembly 210, the second positioning assembly 400 includes a reference member 430 capable of being turned over the first positioning assembly 210, the opposite sides of a first side plate 112 and a second side plate 113 placed on the defined support base plate 111 are positioned by the reference member 430, the centering device includes a third positioning assembly 500 and a fourth positioning assembly 600 symmetrically disposed on two sides of the first positioning assembly 210, the third positioning assembly 500 includes a first positioning portion 530 and a first docking member 532, the fourth positioning assembly 600 includes a second positioning portion 620 and a second docking member 622, and the first positioning portion 530 presses the first side plate 112 against the reference member 430 and the second positioning portion 620 presses the second side plate 113 against the reference member 430, and the centering device includes a second docking hole 1131 capable of adapting to the first shaft hole 1121 of the first side plate 112 and the second docking hole 1131.

When the automobile seat positioning device is used, firstly, the support base plate 111 is positioned on the first positioning component 210, then, the support base plate 111 is fixed on the first positioning component 210 through the pressing component 300, positioning limitation of the support base plate 111 is completed, then, the second positioning component 400 acts, the reference piece 430 overturns to the upper side of the support base plate 111, the first side plate 112 and the second side plate 113 are manually placed on two sides of the reference piece 430 respectively for positioning, then, the first butt joint piece 532 of the third positioning component 500 is adjusted to position the first shaft hole 1121, the second butt joint piece 622 of the fourth positioning component 600 is adjusted to position the second shaft hole 1131, after the completion, the third positioning component 500 and the fourth positioning component 600 act simultaneously, so that the first side plate 112 of the first positioning component 530 is pressed against one side of the reference piece 430, and the second positioning component 620 presses the second side plate 113 against the other side of the reference piece 430, meanwhile, the first butt joint piece 532 and the second butt joint piece 113 are manually placed on two sides of the reference piece 430 for positioning, the relative positions of the first side plate 112 and the second side plate 113 are positioned through the reference piece 430, and then, the first butt joint piece 622 and the second butt joint piece 622 are accurately matched with the first shaft hole 1121 and the second shaft hole 1131 to realize the positioning of the two opposite positioning components, and the positioning seat positioning device is positioned on the two sides of the support base plate 110, and the two opposite positioning device can be accurately welded, and the positioning seat positioning device is positioned on the opposite to the side plate 110, and can be welded by the position the first positioning device and the position hole and the base plate 110.

In some embodiments, as shown in fig. 7, 9 and 10, the third positioning assembly 500 includes a first cylinder 510 and a driving portion 520, the first docking member 532 is fixed to a cylinder rod of the first cylinder 510, and the driving portion 520 is used for driving the cylinder rod to perform a linear motion so as to adjust a distance between the first docking member 532 and the first side plate 112. The driving part 520 is provided such that the distance of the first positioning part 530 from the first side plate 112 can be manually adjusted so that the first butt piece 532 can be manually adjusted to be inserted into the first shaft hole 1121 to finish the accurate positioning of the first side plate 112.

And the fourth positioning assembly 600 includes a second cylinder 610 and a driving handle 630, the second positioning part 620 is fixed to a cylinder shaft of the second cylinder 610, the driving handle 630 is fixedly connected to one end of the cylinder shaft, and the second positioning part 620 is positioned at the other end of the cylinder shaft. The cylinder circumference can be manually adjusted by the driving handle 630 so that the position of the second positioning portion 620 compared with the second side plate 113 can be adjusted, and thus the second butt joint 622 can be manually adjusted to be inserted into the second shaft hole 1131 to finish the accurate positioning of the second side plate 113.

Specifically, the workbench 200 is provided with a first supporting seat for fixing the first air cylinder 510 and a second supporting seat for fixing the second air cylinder 610, after the first abutting part 532, the first positioning part 530, the second abutting part 622 and the second positioning part 620 are all adjusted, when the operation is required, the first side plate 112 is firstly placed at the corresponding position of the support base plate 111 and the first side plate 112 is abutted against the reference part 430, then the driving part 520 pushes the air cylinder rod slowly, so that the first positioning part 530 is abutted against the first side plate 112, then the second side plate 113 is placed at the corresponding position of the support base plate 111 and the second side plate 113 is abutted against the reference part 430, then the driving handle 630 pushes the air cylinder shaft slowly, so that the second positioning part 620 is abutted against the second side plate 113, after the steps are completed, the positioning of the first side plate 112 and the second side plate 113 is realized, and then high-pressure air flow is introduced into the first air cylinder 510 and the second air cylinder 610, so that the first positioning part 530 can press the first side plate 112 against the first side plate 112 and the second side plate 620 against the reference part 620, and the second side plate 113 can be abutted against the reference part 113, and the first positioning part 113 can be welded, and the first positioning part 113 can be abutted against the reference part 113, and the reference part 430 can be fixed according to the requirements.

In the embodiment of the present application, as shown in fig. 9 and 10, the driving part 520 includes a fixing member 521, a first link 522, a second link 523, and a third link 524, where the fixing member 521 is fixedly connected to the cylinder rod, the first link 522 is fixedly connected to the first cylinder 510, an end of the second link 523 is hinged to the first link 522, one end of the third link 524 is connected to the fixing member 521, and the other end is connected to the middle of the second link 523. The cylinder rod can be pushed to perform linear reciprocating motion in a labor-saving mode by pulling the second connecting rod 523.

In some examples, as shown in fig. 8 and 9, the end of the first butt piece 532 has a tapered end, the end of the second butt piece 622 has a groove 623 that fits the tapered end, and the tapered end inserts into the groove 623 when the first butt piece 532 abuts the second butt piece 622. Precise butting is achieved through matching of the conical portion 533 and the groove 623, and concentricity of the first shaft hole 1121 and the second shaft hole 1131 is ensured. It should be noted that, in the embodiment of the present application, whether the first butt joint piece 532 is butt jointed with the second butt joint piece 622 or not, the central axes of the first butt joint piece 532 and the second butt joint piece 622 are in a collinear state, and the first butt joint piece 532 and the second butt joint piece 622 are both main bodies.

In some embodiments, the first positioning portion 530 further includes a first positioning pin 531, and when the first docking member 532 is inserted into the first shaft hole 1121, the first positioning pin 531 is adapted to the first positioning hole 1122 of the first side plate 112. The first positioning pin 531, the first butt joint piece 532 and the reference piece 430 are added to define a specific position of the first side plate 112 together, so that the first side plate 112 is ensured to be in a correct position during welding.

In some embodiments, the second positioning portion 620 further includes a second positioning pin 621, and when the second docking member 622 is inserted into the second shaft hole 1131, the second positioning pin 621 is fitted into the second positioning hole 1132 of the second side plate 113. The second positioning pin 621, the second butt joint 622 and the reference piece 430 are added to define the specific position of the second side plate 113 together, so that the second side plate 113 is positioned at the correct position during welding.

As shown in fig. 9, the first positioning portion 530 further includes a first cooling member 534 for releasing the air flow, when the first butt-joint member 532 is butt-jointed to the second butt-joint member 622, the air outlet hole 5341 of the first cooling member 534 is aligned to the connection portion between the first side plate 112 and the support base plate 111, wherein the first cooling member 534 has an air flow channel inside, one end of the air flow channel is set as the air outlet hole 5341, the other end is set as the air inlet hole 5342, and the air inlet hole 5342 is set with an air joint. After the welding is finished, the connection part of the first side plate 112 and the support base plate 111 is cooled by the air blown out by the first cooling piece 534, so that the influence of deformation caused by high temperature is reduced, and the yield of finished products is improved.

As shown in fig. 8, the second positioning portion 620 further includes a second cooling element 625 for releasing the air flow, when the first butt joint element 532 is butt jointed to the second butt joint element 622, the air outlet end 6252 of the second cooling element 625 is aligned with the connection position between the second side plate 113 and the support base plate 111, wherein the first cooling element 534 has an air channel therein, one end of the air channel is set as the air outlet end 6252, the other end is set as the air inlet end 6251, and an air joint is set at the air inlet end 6251. After the welding is finished, the connection part of the second side plate 113 and the support base plate 111 is cooled by the air blown out by the second cooling piece 625, so that the influence of deformation caused by high temperature is reduced, and the yield of finished products is improved.

In the embodiment of the present application, as shown in fig. 2 to 6 and fig. 11, the pressing assembly 300 is provided with multiple groups, so that the support base plate 111 can be completely pressed on the first positioning assembly 210, the pressing assembly 300 includes a third cylinder and a pressing block, the pressing block can be turned over to the upper side of the first positioning assembly 210 under the action of the third cylinder, specifically, the third cylinder can be a lever cylinder, the pressing block can be driven to perform turning movement by the lever cylinder, and the taking and placing can be achieved by reasonably adjusting the position of the pressing assembly 300.

Further, the second positioning assembly 400 includes a fourth cylinder 410, the fourth cylinder 410 is used for driving the reference member 430 to turn over, the fourth cylinder 410 can also be a lever cylinder, the reference member 430 can be driven to turn over by the lever cylinder, in order to ensure accurate positioning, two sides of the reference member 430, which are used for positioning the first side plate 112 and the second side plate 113, are respectively provided with a fine-adjustable bump 431, and the bumps 431 are connected with the reference member 430 through bolts, so that fine adjustment can be performed according to the situation, and positioning accuracy is ensured. As shown in fig. 11, in order to prevent the overturning of the reference member 430 from affecting other components, the reference member 430 is connected to the fourth cylinder 410 through the connection member 420.

In the embodiment of the present application, the first positioning component 210 includes a plurality of second supports, and the second supports are provided with shaft pins for positioning the support base 111.

In some embodiments, to avoid the excessive impact force of the first cylinder 510, the first bump protection seat 220 may be disposed on the working table 200, the first bump protection seat 220 is not in contact with the first positioning component 210, and the top of the first bump protection seat 220 is located on the moving path of the first positioning portion 530, correspondingly, the first buffer block 535 is disposed on the first positioning portion 530, where the first buffer block 535 may be made of rubber, and when the first positioning portion 530 presses the first side plate 112 against the first bump protection seat 220 under the action of the first cylinder 510, the second buffer block 624 presses against the first bump protection seat 220.

In order to avoid the excessive impact force of the second cylinder 610, the second anti-collision seat 230 may be disposed on the workbench 200, the second anti-collision seat 230 is not in contact with the first positioning assembly 210, and the top of the second anti-collision seat 230 is located on the moving path of the second positioning portion 620, correspondingly, the second positioning portion 620 is provided with the second buffer block 624, where the second buffer block 624 may be made of rubber, and when the second positioning portion 620 presses the second side plate 113 against the second anti-collision seat 230 under the action of the second cylinder 610 before the second side plate 113 is pressed against the reference member 430.

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

Claims (10)

1. The welding jig for the rotating shaft support of the automobile seat is characterized by comprising a workbench, wherein a first positioning assembly, a pressing assembly, a second positioning assembly and a centering device are arranged on the workbench, the pressing assembly is used for pressing and positioning a support base plate positioned on the first positioning assembly, the second positioning assembly comprises a reference piece capable of being overturned to the upper part of the first positioning assembly, one side, opposite to the first side plate and the second side plate, of the support base plate which are positioned and limited is positioned through the reference piece, the centering device comprises a third positioning assembly and a fourth positioning assembly which are symmetrically arranged on two sides of the first positioning assembly, the third positioning assembly comprises a first positioning part and a first abutting piece, the fourth positioning assembly comprises a second positioning part and a second abutting piece, and when the first positioning part presses the first side plate against the reference piece and the second positioning part presses the second side plate against the reference piece, the first abutting piece used for adapting to the first shaft hole of the first side plate can be adapted to move to the second abutting piece of the second shaft hole of the second side plate.

2. The welding jig for the rotating shaft support of the automobile seat according to claim 1, wherein the third positioning component comprises a first cylinder and a driving part, the first butt joint component is fixed on a cylinder rod of the first cylinder, and the driving part is used for driving the cylinder rod to perform linear motion so as to adjust the distance between the first butt joint component and the first side plate.

3. The welding jig for the rotating shaft support of the automobile seat according to claim 2, wherein the driving part comprises a fixing piece, a first connecting rod, a second connecting rod and a third connecting rod, the fixing piece is fixedly connected with the cylinder rod, the first connecting rod is fixedly connected with the first cylinder, the end part of the second connecting rod is hinged with the first connecting rod, one end of the third connecting rod is connected with the fixing piece, and the other end of the third connecting rod is connected with the middle part of the second connecting rod.

4. The welding jig for the rotating shaft support of the automobile seat according to claim 1, wherein the end part of the first abutting part is provided with a conical end, the end part of the second abutting part is provided with a groove matched with the conical end, and the conical end is inserted into the groove when the first abutting part abuts against the second abutting part.

5. The welding jig for the rotating shaft support of the automobile seat according to claim 1, wherein the first positioning portion further comprises a first positioning pin, and the first positioning pin is matched with the first positioning hole of the first side plate when the first abutting part is inserted into the first shaft hole.

6. The welding jig for a rotating shaft support of an automobile seat according to claim 1, wherein the second positioning portion further comprises a second positioning pin, and the second positioning pin is matched with the second positioning hole of the second side plate when the second abutting piece is inserted into the second shaft hole.

7. The welding jig for the rotating shaft support of the automobile seat according to claim 1, wherein the first positioning portion further comprises a first cooling piece for releasing air flow, and when the first butt joint piece is butt jointed with the second butt joint piece, an air outlet hole of the first cooling piece is aligned with a joint of the first side plate and the support base plate.

8. The welding jig for the rotating shaft support of the automobile seat according to claim 1, wherein the second positioning portion further comprises a second cooling piece for releasing air flow, and when the first butt joint piece is butt jointed with the second butt joint piece, the air outlet end of the second cooling piece is aligned with the joint of the second side plate and the support bottom plate.

9. The welding jig for the rotating shaft support of the automobile seat according to claim 1, wherein the fourth positioning assembly comprises a second air cylinder and a driving handle, the second positioning part is fixed on an air cylinder shaft of the second air cylinder, the driving handle is fixedly connected with one end of the air cylinder shaft, and the second positioning part is positioned at the other end of the air cylinder shaft.

10. The welding jig for the rotating shaft support of the automobile seat is characterized in that the pressing assembly comprises a third cylinder and a pressing block, the pressing block can be overturned above the first positioning assembly under the action of the third cylinder, the second positioning assembly comprises a fourth cylinder, and the fourth cylinder is used for driving the datum piece to overturne.