CN210818176U

CN210818176U - Novel vapour car trunk apron welded fastening device

Info

Publication number: CN210818176U
Application number: CN201921671637.8U
Authority: CN
Inventors: 吕全福
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-10-08
Filing date: 2019-10-08
Publication date: 2020-06-23
Anticipated expiration: 2029-10-08

Abstract

The utility model relates to an automobile processing machinery equipment technical field, especially a novel vapour car trunk apron welded fastening device, compared with the prior art, this novel vapour car trunk apron welded fastening device passes through A type activity ejector pin fixer, B type activity ejector pin fixer, diaphragm depression bar fixer, push pedal clamp plate fixer, two clamp plate fixers, single depression bar fixer and the combination that the single clamp plate fixer in center carried out different positions according to the structure of work piece on the fixed station, make vapour car trunk apron when being fixed, each position and angle are all fixed by corresponding fixer, make the welding of work piece on each side can not receive the influence of displacement and vibration, improve welding quality.

Description

Novel vapour car trunk apron welded fastening device

Technical Field

The invention relates to the technical field of automobile processing mechanical equipment, in particular to a novel welding and fixing device for an automobile trunk cover plate.

Background

The fixing device generally has two types, one type is to connect and fix by using fasteners such as screws, the fixing mode is generally used for long-term fixing components, the other type is to fix by using movable type, for example, a pneumatic cylinder or a hydraulic cylinder is used to control components such as a fixing rod to fix a workpiece, the movable type fixing device in the prior art is provided with a fixing direction and a fixing angle to fix the workpiece, and the number of the published Chinese patent publication is as follows: CN106737310A, name: the invention discloses a fixed positioning device of a rotating structure, which adopts a hydraulic cylinder to match with a fixed rod to fix the rotating structure, the fixed direction and the fixed angle of the fixed positioning device are both single, and the fixed positioning device is easy to move and deflect a workpiece, thereby influencing the processing of the workpiece.

Especially, when the automobile trunk cover plate is welded on special-shaped parts such as the automobile trunk cover plate, the distribution direction and the angle of the welding points are diversified due to the fact that the welding points are arranged on the inner surface and the outer surface, all the welding points of the automobile trunk cover plate need to be welded at one time in order to reduce machining processes and change stations, and therefore all parts of the automobile trunk cover plate need to be positioned and fixed.

Disclosure of Invention

For defect and the problem of solving fixed existence of vapour car trunk apron among the prior art, provide a novel vapour car trunk apron welded fastening device.

The technical scheme adopted by the invention for solving the technical problem is as follows: the novel welding and fixing device for the automobile trunk cover plate comprises a fixing workbench, wherein two A-type movable ejector rod fixing devices, two B-type movable ejector rod fixing devices, two transverse plate compression rod fixing devices, a push plate compression plate fixing device, two double compression plate fixing devices, a single compression rod fixing device and a central single compression plate fixing device are arranged on the fixing workbench; the movable ejector rod fixer comprises a first base, a first supporting block is fixed on the first base, the first supporting block extends to the side edge and is connected with a first supporting seat, the upper end of the first supporting block props against a first positioning block, the lower end of the first supporting seat is connected with a first push-pull air cylinder, the upper end of the first supporting seat is connected with a first sliding seat, two ends of the first sliding seat are fixed with a first double-lug connecting seat, the first double-lug connecting seat is connected with two ends of the first sliding seat in a hinged manner, the other end of the first double-lug connecting seat is connected with a first air cylinder fixing seat, the first air cylinder fixing seat is provided with three coaxial exhaust cylinders, the other end of the first air cylinder fixing seat extends outwards to form an ejector rod fixing seat, a double-lug movable frame is hinged on the ejector rod fixing seat, an ejector rod is hinged on the double-lug movable frame, and the other end of the ejector rod is hinged on an ejector, the ejector rod extension bar is connected to an extension bar supporting plate, and the extension bar supporting plate is fixed on the first air cylinder fixing seat; the transverse plate pressure rod fixer comprises a second base, wherein a second supporting block is fixed on the second base, the second supporting block extends to the side edge and is connected with a second supporting seat, the lower end of the second supporting seat is connected with a second push-pull air cylinder, the upper end of the second supporting seat is connected with a second sliding seat, two ends of the second sliding seat are fixedly provided with a second double-lug connecting seat, the second double-lug connecting seat is connected with two ends of the second sliding seat in a hinged relation, the outer side of the other end of the second double-lug connecting seat is connected with a second connecting plate, the outer end of the second connecting plate is fixedly provided with a second transverse plate pressure rod, the tail end of the second transverse plate pressure rod is downwards connected with a second pressure rod seat, the second pressure rod seat is connected with a second pressure rod, and the tail end of the second pressure rod is downwards; the push plate and press plate fixer comprises a third base, wherein a third supporting block is fixed on the third base, the third supporting block extends to the side edge and is connected with a third supporting seat, the lower end of the third supporting seat is connected with a third push-pull air cylinder, the upper end of the third supporting seat is connected with a third sliding seat, a third double-lug connecting seat is fixed at two ends of the third sliding seat, the third double-lug connecting seat is connected with two ends of the third sliding seat in a hinge relationship, a third connecting plate is connected to the inner side of the other end of the third double-lug connecting seat, a third cross plate press rod is fixed at the lower end of the third connecting plate, and the tail ends of two sides of the third cross plate press rod are downwards connected with; the double-pressure-plate fixer comprises a fourth base, wherein a fourth supporting block is fixed on the fourth base, the fourth supporting block extends to the side edge and is connected with a fourth supporting seat, the lower end of the fourth supporting seat is connected with a fourth push-pull cylinder, the upper end of the fourth supporting seat is connected with a fourth sliding seat, a fourth double-lug connecting seat is fixed at two ends of the fourth sliding seat, the fourth double-lug connecting seat is connected with two ends of the fourth sliding seat in a hinge relationship, the other end of the fourth double-lug connecting seat is connected with a T-shaped pressure plate, and an L-shaped pressure plate is fixed towards two outer ends of the T-shaped pressure plate; the single-pressure-bar fixer comprises a fifth sliding seat, wherein fifth double-lug connecting seats are fixed at two ends of the fifth sliding seat, the fifth double-lug connecting seats are connected with two ends of the fifth sliding seat in a hinged relation, the other end of the fifth double-lug connecting seat is connected with a T-shaped connecting plate, the T-shaped connecting plate is pressed on a fifth pressure plate, the fifth pressure plate is pressed on a fifth positioning block, the fifth positioning block is fixed on a fifth supporting block, and the fifth double-lug connecting seat and the T-shaped connecting plate slide back and forth along the fifth positioning block under the push-and-pull of the fifth sliding seat; the central single-pressing-plate fixer comprises a sixth base, a frame-shaped supporting frame is fixed on the sixth base, a transverse cylinder is fixed in the frame-shaped supporting frame, and a sixth pressing plate is connected outside the transverse cylinder.

The first base is fixed with a rib plate, the rib plate forms a triangular stable relation, the bottom surface of the first base is provided with two rows of fixing holes, the first base is fixed on the fixed workbench through the two rows of fixing holes, the vertical surface of the first base is also provided with two rows of fixing holes, and the first supporting block is fixed on the first base through the two rows of fixing holes.

The first push-pull air cylinder extends upwards to form an air cylinder push-pull plate, the upper end of the air cylinder push-pull plate is fixed on the first sliding seat, the first sliding seat is driven by the first push-pull air cylinder through the air cylinder push-pull plate to move up and down, and the first air cylinder fixing seat is driven by the first sliding seat through the first double-lug connecting seat to move left and right.

The first cylinder fixing seat is pressed on the first positioning block, and the first cylinder fixing seat slides left and right along the first positioning block under the push-pull of the first double-lug connecting seat.

The lower end of the second double-lug connecting seat is pressed on a second pressing plate, the second pressing plate presses a second positioning block, the second positioning block is fixed on a second base, and the second double-lug connecting seat slides left and right along the second positioning block under the push-pull of the second sliding seat.

And a three-convex-shaft push plate is fixed at the upper end of the third supporting block, the three-convex-shaft push plate protrudes backwards to form three convex shafts, and a third positioning pin is further arranged on the side edge of the three-convex-shaft push plate.

The inner side of the third connecting plate is downwards connected with a third pressing plate, the third pressing plate presses a third positioning block, the third positioning block is fixed on a third supporting block, and the third double-lug connecting seat and the third connecting plate slide back and forth along the third positioning block under the push-pull action of a third push-pull air cylinder.

The B-type movable ejector rod fixer is additionally provided with a T-shaped frame on the basis of the A-type movable ejector rod fixer, the T-shaped frame is fixed at the outer end of the first air cylinder fixing seat, an L-shaped connecting frame is fixedly connected outside the T-shaped frame, one end of the L-shaped connecting frame is fixed at the tail end of the first air cylinder fixing seat, and the other end of the L-shaped connecting frame is fixed on the T-shaped frame.

And a Z-shaped transverse pressing plate is fixed at the lower end of the T-shaped frame.

The middle of the fixed workbench is provided with a connecting through hole, and the side of the fixed workbench is provided with each cylinder control valve cabinet.

The invention has the beneficial effects that: compared with the prior art, the novel welding and fixing device for the automobile trunk cover plate is used for combining different positions on a fixing workbench through the A-type movable ejector rod fixer, the B-type movable ejector rod fixer, the transverse plate pressure rod fixer, the push plate pressure plate fixer, the double pressure plate fixer, the single pressure rod fixer and the central single pressure plate fixer according to the structure of a workpiece, so that when the automobile trunk cover plate is fixed, all directions and angles are fixed by the corresponding fixers, the welding of the workpiece in all directions cannot be influenced by displacement and vibration, and the welding quality is improved.

Drawings

The novel welding and fixing device for the automobile trunk cover plate is further described with reference to the accompanying drawings and the specific embodiment.

FIG. 1 is a schematic perspective view of a novel welding and fixing device for a trunk cover plate of an automobile according to the present invention;

FIG. 2 is a schematic perspective view of the A-shaped movable carrier rod fixer of FIG. 1;

FIG. 3 is a schematic perspective view of the B-shaped movable carrier rod fixer of FIG. 1;

FIG. 4 is a schematic perspective view of the cross plate strut retainer shown in FIG. 1

Fig. 5 is a schematic perspective view of the push plate holder of fig. 1.

The specific implementation mode is as follows:

as shown in fig. 1 to 5, the novel welding and fixing device for the automobile trunk cover plate comprises a fixing workbench 10, a connecting through hole 11 is formed in the middle of the fixing workbench 10, the connecting through hole 11 is used for connecting with other external equipment of a welding gun and the like, each cylinder control valve cabinet 12 is arranged on the side edge of the fixing workbench 10, and each cylinder control valve cabinet 12 is used for ventilating and controlling air pressure of each cylinder. Two A-type movable ejector rod holders 20, two B-type movable ejector rod holders 30, two transverse plate press rod holders 40, a push plate press plate holder 50, two double press plate holders 60, a single press rod holder 70 and a central single press plate holder 80 are arranged on the fixed workbench 10. The A-shaped movable ejector rod fixer 20, the transverse plate compression bar fixer 30, the push plate compression bar fixer 40, the double compression bar fixer 50 and the central single compression bar fixer 60 are all fixed on the fixed workbench 10 through fasteners, and the position relationship among all the parts can be changed to form irregular arrangement.

As shown in fig. 1 and 2, the a-type movable ejector rod fixer 20 includes a first base 21, a rib plate 211 fixed on the first base 21, the rib plate 211 forming a triangular stable relationship, two rows of fixing holes 212 formed on the bottom surface of the first base 21, the first base 21 fixed on the fixed working table 10 through the two rows of fixing holes 212, and the fixing position between the first base 21 and the fixed working table 10 can be adjusted according to the welding requirement of the workpiece. Two rows of fixing holes 212 are also provided in the vertical surface of the first base 21, and a first support block 22 is fixed through the two rows of fixing holes 212.

As shown in FIG. 2, the first supporting block 22 extends laterally to connect with a first supporting seat 23, and the upper end of the first supporting block 22 abuts against a first positioning block 221. The lower end of the first supporting seat 23 is connected with a first push-pull cylinder 24, and the first push-pull cylinder 24 extends upwards to form a cylinder push-pull plate 241. The upper end of the first support seat 23 is connected with a first slide seat 25, the upper end of the cylinder push-pull plate 241 is fixed on the first slide seat 25, and the first slide seat 25 is driven by the first push-pull cylinder 24 through the cylinder push-pull plate 241 to move up and down.

As shown in fig. 2, a first binaural connecting seat 26 is fixed at two ends of the first slide seat 25, the first binaural connecting seat 26 is connected with two ends of the first slide seat 25 in a hinged relationship, the other end of the first binaural connecting seat 26 is connected with a first cylinder fixing seat 27, the first cylinder fixing seat 27 is pressed on the first positioning block 221, and the first cylinder fixing seat 27 is driven by the first slide seat 25 through the first binaural connecting seat 26 to move left and right. The coaxial three-exhaust-cylinder 28 is arranged on the first cylinder fixing seat 27, a mandril fixing seat 29 extends outwards from the other end of the first cylinder fixing seat 27, a double-lug movable frame 201 is hinged on the mandril fixing seat 29, a mandril 202 is hinged on the double-lug movable frame 201, the other end of the mandril 202 is hinged on a mandril extension rod 203, the mandril extension rod 203 is connected on an extension rod supporting plate 204, and the extension rod supporting plate 204 is fixed on the first cylinder fixing seat 27. The first cylinder holder 27 slides left and right along the first positioning block 221 by the push and pull of the first double lug coupling holder 26.

As shown in FIG. 2, the first push-pull cylinder 24 drives the entire coaxial three-cylinder 28 to move left and right, the coaxial three-cylinder 28 drives the ejector rod 202 to move back and forth, the workpiece is fixed and positioned by the ejector rod 202, and the parts of the workpiece in different directions are fixed by the ejector rod 202 through the cooperation of the coaxial three-cylinder 28 and the first push-pull cylinder 24.

As shown in fig. 2 and 3, the B-type movable jack holder 30 is added with a T-shaped frame 31 on the basis of the a-type movable jack holder 20. The T-shaped frame 31 is fixed at the outer end of the first cylinder fixing seat 27, and an L-shaped connecting frame 32 is fixedly connected outside the T-shaped frame 31. One end of the L-shaped connecting frame 32 is fixed at the tail end of the first cylinder fixing seat 27, and the other end of the L-shaped connecting frame 32 is fixed on the T-shaped frame 31. A Z-shaped transverse pressing plate 33 is fixed at the lower end of the T-shaped frame 31, and a workpiece can be fixed through the Z-shaped transverse pressing plate 33.

As shown in fig. 4, the cross plate press rod fixer 40 includes a second base 41, a second support block is fixed on the second base 41, the second support block extends to a side edge to connect with a second support seat 42, a second push-pull cylinder 43 is connected to a lower end of the second support seat 42, a second slide seat 44 is connected to an upper end of the second support seat 42, a second two-lug connecting seat 45 is fixed at two ends of the second slide seat 44, the second two-lug connecting seat 45 is connected with two ends of the second slide seat 44 in a hinged relationship, a lower end of the second two-lug connecting seat 45 is pressed on a second press plate 46, the second press plate 46 is pressed on a second positioning block 47, the second positioning block 47 is fixed on the second base 41, and the second two-lug connecting seat 45 slides left and right along the second positioning block 47 under the push-pull of the second slide seat 44.

As shown in fig. 4, a second connecting plate 48 is connected to the outer side of the other end of the second double-lug connecting seat 45, a second transverse plate pressing rod 49 is fixed to the outer end of the second connecting plate 48, the end of the second transverse plate pressing rod 49 is connected to a second pressing rod seat 401 downward, a second pressing rod 402 is connected to the second pressing rod seat 401, a second transverse pressing plate 403 is fixedly connected to the end of the second pressing rod 402 downward, and the second transverse pressing plate 403 is pressed on the workpiece for fixing. The second cross press plate 403 is driven by the second press rod 402 to move left and right to adapt to the fixation of different length parts of the workpiece, and the second connecting plate 48 is driven by the second push-pull air cylinder 43 to move up and down to enable the second cross press plate 403 to move up and down to adapt to the fixation of different height parts of the workpiece.

As shown in fig. 5, the pushing plate holder 50 includes a third base 51, a third supporting block 52 fixed on the third base 51, a three-convex-shaft pushing plate 53 fixed on the upper end of the third supporting block 52, three convex shafts 54 protruding backwards from the three-convex-shaft pushing plate 53, and a third positioning pin 531 provided on the side of the three-convex-shaft pushing plate 53. The convex and concave parts of the workpiece are fixed by the three convex shafts 54, and the fixed position is positioned by the third positioning pin 531.

As shown in fig. 5, the third supporting block 52 extends laterally to connect with a third supporting seat 55, the lower end of the third supporting seat 55 is connected with a third push-pull cylinder 56, the upper end of the third supporting seat 55 is connected with a third sliding seat 57, a third binaural connecting seat 58 is fixed at two ends of the third sliding seat 57, and the third binaural connecting seat 58 is connected with two ends of the third sliding seat 57 in a hinged relationship. A third connecting plate 59 is connected to the inner side of the other end of the third double-lug connecting seat 58, a third transverse plate pressing rod 501 is fixed to the lower end of the third connecting plate 59, the tail ends of two sides of the third transverse plate pressing rod 501 are both connected with a Z-shaped pressing plate 502 downwards, and different parts of a workpiece are fixed and stabilized through the two Z-shaped pressing plates 502 so as to prevent the workpiece from vibrating during welding.

As shown in fig. 5, the inner side of the third connecting plate 59 is connected with a third pressing plate 503 downward, the third pressing plate 503 presses the third positioning block 504, the third positioning block 504 is fixed on the third supporting block 52, and the third binaural connecting seat 58 and the third connecting plate 59 slide back and forth along the third positioning block 504 under the push-pull of the third push-pull cylinder 56, so as to be suitable for fixing and positioning different parts of the workpiece.

As shown in fig. 1, the dual platen holder 60 includes a fourth base (not shown) on which a fourth support block (not shown) is fixed, and the fourth base and the fourth support block of the dual platen holder 60 are the same as the a-type movable jack holder 20 and will not be described in detail. A fourth supporting block (not shown) extends to the side to connect with a fourth supporting seat 61, the lower end of the fourth supporting seat 61 is connected with a fourth push-pull cylinder (not shown), the upper end of the fourth supporting seat 61 is connected with a fourth sliding seat 62, a fourth double-lug connecting seat 63 is fixed at two ends of the fourth sliding seat 62, and the fourth double-lug connecting seat 63 is connected with two ends of the fourth sliding seat 62 in a hinge relationship. The other end of the fourth binaural connecting seat 63 is connected to a T-shaped pressing plate 64, and an L-shaped pressing plate 65 is fixed to both outer ends of the T-shaped pressing plate 64. The L-shaped pressing plate 65 is driven by the fourth slide 62 and the fourth binaural connecting seat 63 to fix the workpiece downward.

As shown in fig. 1, the single-compression-rod fixer 70 includes a fifth sliding base 71 (the base portion of the single-compression-rod fixer 70 is the same as the a-type movable ejector rod fixer 20, and will not be described in detail here), a fifth binaural connecting base 72 is fixed at both ends of the fifth sliding base 71, the fifth binaural connecting base 72 is connected with both ends of the fifth sliding base 71 in a hinged relationship, the other end of the fifth binaural connecting base 72 is connected with a T-shaped connecting plate 73, the T-shaped connecting plate 73 is pressed on a fifth pressing plate 74, the fifth pressing plate 74 is pressed on a fifth positioning block 75, the fifth positioning block 75 is fixed on a fifth supporting block 76, and the fifth binaural connecting base 72 and the T-shaped connecting plate 73 slide back and forth along the fifth positioning block 75 under the push-pull of the fifth sliding base 71. The workpiece sheet portion is fixed by the cooperation between the fifth presser plate 74 and the fifth positioning block 75.

As shown in fig. 1, the central single pressing plate fixer 80 includes a sixth base 81, a frame-shaped supporting frame 82 is fixed on the sixth base 81, a transverse cylinder 83 is fixed in the frame-shaped supporting frame 82, a sixth pressing plate 84 is connected outside the transverse cylinder 83, the sixth pressing plate 84 can move left and right under the driving of the transverse cylinder 83, and the vertical portion of the workpiece is fixed by the left and right movement of the sixth pressing plate 84.

In summary, compared with the prior art, the novel welding and fixing device for the automobile trunk cover plate, provided by the invention, is used for combining different positions on the fixing workbench according to the structure of a workpiece through the A-type movable ejector rod fixer, the B-type movable ejector rod fixer, the transverse plate compression rod fixer, the push plate compression plate fixer, the double compression plate fixer, the single compression rod fixer and the central single compression plate fixer, so that when the automobile trunk cover plate is fixed, all directions and angles are fixed by the corresponding fixers, the welding of the workpiece in all directions cannot be influenced by displacement and vibration, and the welding quality is improved.

The present invention has been described in accordance with embodiments thereof with the understanding that the present invention is not limited thereto but rather it is to be understood that variations and/or modifications may be made by those skilled in the art without departing from the scope of the invention as defined by the appended claims, and any such modifications, equivalents and the like as fall within the true spirit and scope of the invention.

Claims

1. Novel vapour car trunk apron welded fastening device, its characterized in that: the device comprises a fixed workbench, wherein two A-type movable ejector rod fixers, two B-type movable ejector rod fixers, two transverse plate compression bar fixers, a push plate compression bar fixer, two double compression bar fixers, a single compression bar fixer and a central single compression bar fixer are arranged on the fixed workbench; the A-shaped movable ejector rod fixer comprises a first base, a first supporting block is fixed on the first base, the first supporting block extends to the side edge and is connected with a first supporting seat, the upper end of the first supporting block props against a first positioning block, the lower end of the first supporting seat is connected with a first push-pull air cylinder, the upper end of the first supporting seat is connected with a first sliding seat, two ends of the first sliding seat are fixedly provided with a first double-lug connecting seat, the first double-lug connecting seat is connected with two ends of the first sliding seat in a hinged manner, the other end of the first double-lug connecting seat is connected with a first air cylinder fixing seat, the first air cylinder fixing seat is provided with three coaxial exhaust cylinders, the other end of the first air cylinder fixing seat extends outwards to form an ejector rod fixing seat, a double-lug movable frame is hinged on the ejector rod fixing seat, an ejector rod is hinged on the double-lug movable frame, and the other end of the ejector rod is hinged on, the ejector rod extension bar is connected to an extension bar supporting plate, and the extension bar supporting plate is fixed on the first air cylinder fixing seat; the transverse plate pressure rod fixer comprises a second base, wherein a second supporting block is fixed on the second base, the second supporting block extends to the side edge and is connected with a second supporting seat, the lower end of the second supporting seat is connected with a second push-pull air cylinder, the upper end of the second supporting seat is connected with a second sliding seat, two ends of the second sliding seat are fixedly provided with a second double-lug connecting seat, the second double-lug connecting seat is connected with two ends of the second sliding seat in a hinged relation, the outer side of the other end of the second double-lug connecting seat is connected with a second connecting plate, the outer end of the second connecting plate is fixedly provided with a second transverse plate pressure rod, the tail end of the second transverse plate pressure rod is downwards connected with a second pressure rod seat, the second pressure rod seat is connected with a second pressure rod, and the tail end of the second pressure rod is downwards; the push plate and press plate fixer comprises a third base, wherein a third supporting block is fixed on the third base, the third supporting block extends to the side edge and is connected with a third supporting seat, the lower end of the third supporting seat is connected with a third push-pull air cylinder, the upper end of the third supporting seat is connected with a third sliding seat, a third double-lug connecting seat is fixed at two ends of the third sliding seat, the third double-lug connecting seat is connected with two ends of the third sliding seat in a hinge relationship, a third connecting plate is connected to the inner side of the other end of the third double-lug connecting seat, a third cross plate press rod is fixed at the lower end of the third connecting plate, and the tail ends of two sides of the third cross plate press rod are downwards connected with; the double-pressure-plate fixer comprises a fourth base, wherein a fourth supporting block is fixed on the fourth base, the fourth supporting block extends to the side edge and is connected with a fourth supporting seat, the lower end of the fourth supporting seat is connected with a fourth push-pull cylinder, the upper end of the fourth supporting seat is connected with a fourth sliding seat, a fourth double-lug connecting seat is fixed at two ends of the fourth sliding seat, the fourth double-lug connecting seat is connected with two ends of the fourth sliding seat in a hinge relationship, the other end of the fourth double-lug connecting seat is connected with a T-shaped pressure plate, and an L-shaped pressure plate is fixed towards two outer ends of the T-shaped pressure plate; the single-pressure-bar fixer comprises a fifth sliding seat, wherein fifth double-lug connecting seats are fixed at two ends of the fifth sliding seat, the fifth double-lug connecting seats are connected with two ends of the fifth sliding seat in a hinged relation, the other end of the fifth double-lug connecting seat is connected with a T-shaped connecting plate, the T-shaped connecting plate is pressed on a fifth pressure plate, the fifth pressure plate is pressed on a fifth positioning block, the fifth positioning block is fixed on a fifth supporting block, and the fifth double-lug connecting seat and the T-shaped connecting plate slide back and forth along the fifth positioning block under the push-and-pull of the fifth sliding seat; the central single-pressing-plate fixer comprises a sixth base, a frame-shaped supporting frame is fixed on the sixth base, a transverse cylinder is fixed in the frame-shaped supporting frame, and a sixth pressing plate is connected outside the transverse cylinder.

2. The novel welding and fixing device for the automobile trunk cover plate according to claim 1 is characterized in that: the first base is fixed with a rib plate, the rib plate forms a triangular stable relation, the bottom surface of the first base is provided with two rows of fixing holes, the first base is fixed on the fixed workbench through the two rows of fixing holes, the vertical surface of the first base is also provided with two rows of fixing holes, and the first supporting block is fixed on the first base through the two rows of fixing holes.

3. The novel welding and fixing device for the automobile trunk cover plate according to claim 1 or 2 is characterized in that: the first push-pull air cylinder extends upwards to form an air cylinder push-pull plate, the upper end of the air cylinder push-pull plate is fixed on the first sliding seat, the first sliding seat is driven by the first push-pull air cylinder through the air cylinder push-pull plate to move up and down, and the first air cylinder fixing seat is driven by the first sliding seat through the first double-lug connecting seat to move left and right.

4. The novel welding and fixing device for the automobile trunk cover plate according to claim 3 is characterized in that: the first cylinder fixing seat is pressed on the first positioning block, and the first cylinder fixing seat slides left and right along the first positioning block under the push-pull of the first double-lug connecting seat.

5. The novel welding and fixing device for the automobile trunk cover plate according to claim 1 is characterized in that: the lower end of the second double-lug connecting seat is pressed on a second pressing plate, the second pressing plate presses a second positioning block, the second positioning block is fixed on a second base, and the second double-lug connecting seat slides left and right along the second positioning block under the push-pull of the second sliding seat.

6. The novel welding and fixing device for the automobile trunk cover plate according to claim 1 is characterized in that: and a three-convex-shaft push plate is fixed at the upper end of the third supporting block, the three-convex-shaft push plate protrudes backwards to form three convex shafts, and a third positioning pin is further arranged on the side edge of the three-convex-shaft push plate.

7. The novel welding and fixing device for the automobile trunk cover plate according to claim 1 or 6 is characterized in that: the inner side of the third connecting plate is downwards connected with a third pressing plate, the third pressing plate presses a third positioning block, the third positioning block is fixed on a third supporting block, and the third double-lug connecting seat and the third connecting plate slide back and forth along the third positioning block under the push-pull action of a third push-pull air cylinder.

8. The novel welding and fixing device for the automobile trunk cover plate according to claim 1 is characterized in that: the B-type movable ejector rod fixer is additionally provided with a T-shaped frame on the basis of the A-type movable ejector rod fixer, the T-shaped frame is fixed at the outer end of the first air cylinder fixing seat, an L-shaped connecting frame is fixedly connected outside the T-shaped frame, one end of the L-shaped connecting frame is fixed at the tail end of the first air cylinder fixing seat, and the other end of the L-shaped connecting frame is fixed on the T-shaped frame.

9. The novel welding and fixing device for the automobile trunk cover plate according to claim 8 is characterized in that: and a Z-shaped transverse pressing plate is fixed at the lower end of the T-shaped frame.

10. The novel welding and fixing device for the automobile trunk cover plate according to claim 1 is characterized in that: the middle of the fixed workbench is provided with a connecting through hole, and the side of the fixed workbench is provided with each cylinder control valve cabinet.