CN103817475A - Bulletproof and load-bearing type vehicle floor welding and tooling method and tooling clamp thereof - Google Patents

Abstract

The invention relates to a bulletproof and load-bearing type vehicle floor welding and tooling method and a tooling clamp thereof. The bulletproof and load-bearing type vehicle floor welding and tooling method includes that a vehicle floor is subjected to tooling after divided into a front part and a back part, a front longitudinal beam is prepositioned, and a clamp is turned over to control transverse displacement and prevent welding displacement; the back part is subjected to tooling directly, and a back longitudinal beam and the vehicle floor are transversely clamped to prevent welding deformation during welding; the assembled front and back parts are subjected to butt welding to complete tooling of the vehicle floor. Tooling of twenty small assemblies can be achieved through one tooling clamp, and each assembly adopts a vehicle design benchmark; the longitudinal beam is transversely clamped during welding, so that vehicle welding deformation of a bulletproof vehicle can be effectively prevented, precision of vehicle skeleton can be ensured to meet the requirements on assembly of a complete vehicle, labor intensity of operators can be reduced, and working efficiency can be improved.

Description

Bulletproof load-bearing car body floor welding tooling method and tooling fixture

technical field

The invention belongs to the technical field of automobile manufacturing, in particular to a welding tool for a load-bearing vehicle body floor, especially a welding tool for a bulletproof load-bearing vehicle body floor.

Background technique

The welding tooling usually used for the bulletproof load-bearing body floor, the twenty sub-assemblies are assembled and welded on different tooling fixtures, and then each sub-assembly is assembled and welded into a floor. Figure 1 shows Aggregation of each subdivision. At present, there is no tooling fixture developed for the bulletproof load-bearing car body floor. Generally, the front and rear parts of the car body floor are assembled and welded at different stations, and then the front and rear parts are welded together. This kind of tooling Firstly, when the twenty sub-assemblies are assembled and welded into the front and rear parts respectively, the positioning between the sub-assemblies is very difficult, and there are many solder joints; at the same time, the workload of welding is increased and more time is taken up. Tooling resources; and the welding deformation caused by this tooling is difficult to control, especially the welding deformation between the floor and the longitudinal beam is difficult to control.

Contents of the invention

The purpose of the present invention is to propose a tooling method for preventing the welding deformation between the car body floor and the longitudinal beam, and realize the assembly of the bulletproof vehicle longitudinal beam and cross beam, the welding between the longitudinal beam and the vehicle body, and the assembly of the vehicle body on the same set of fixtures. The welding between the front and rear sub-assemblies controls the welding deformation of the bulletproof body floor and eliminates chassis assembly errors.

In order to achieve the above object, the bulletproof load-bearing type car body floor welding tooling method disclosed by the present invention comprises the following steps:

Position and assemble the first crossbeam and the second crossbeam; assemble the left connecting bracket of the first crossbeam, the right connecting bracket of the first crossbeam, the left connecting bracket of the second crossbeam, and the right connecting bracket of the second crossbeam with the first crossbeam and the second crossbeam respectively ; Pre-position the left front side beam and the right front side beam, and turn them inward at a certain angle, drop the cowl bulge assembly, turn the left front side beam and the right front side beam outward, and align the left front side beam and the right front side beam with the Assemble the left connecting bracket of the first crossbeam, the right connecting bracket of the first crossbeam, the left connecting bracket of the second crossbeam, and the right connecting bracket of the second crossbeam; weld the cowl bulge assembly with the left front longitudinal beam and the right front longitudinal beam, including the transverse clamp before welding The step of tightening the left front longitudinal beam and the right front longitudinal beam to prevent the welding deformation of the left front longitudinal beam and the right front longitudinal beam; so far the tooling of the first half is completed;

The third crossbeam and the fourth crossbeam are positioned and assembled; the left rear longitudinal beam and the right rear longitudinal beam are connected to Assemble the third beam and the fourth beam; weld the rear wheel house assembly with the left rear longitudinal beam and the right rear longitudinal beam, including the step of clamping the left rear longitudinal beam and the right rear longitudinal beam The beam and the right rear longitudinal beam are welded and deformed; so far, the tooling of the second half is completed;

Butt weld the front and back halves.

Further, the assembly welding is completed on a jig.

Further, the above-mentioned welding of the front wall bulge assembly with the left front longitudinal beam and the right front longitudinal beam is to weld the left and right front side beams with the front wall bulge assembly at the same time; the above-mentioned welding of the rear wheelhouse assembly with the left rear Beam welding is to weld the left and right rear longitudinal beams to the rear wheel housing assembly at the same time. In this way, it is possible to avoid the asymmetrical stress always generated during the welding process of the longitudinal beam and the vehicle body floor, thereby controlling the welding deformation.

Further, high-position operations are adopted. In this way, ample and comfortable operating space is provided for the operation, and the welding quality and labor efficiency are improved.

The bulletproof load-bearing car body floor welding fixture designed by the present invention includes a base plate, and is characterized in that: the base plate is provided with a slide plate, and a slide rail is provided between the slide plate and the base plate;

The base plate is provided with a front support group supporting each sub-assembly of the front half of the car body floor, and the front support group is provided with a front limiting surface group; (the front supporting component group and the front limiting surface group It is consistent with the body design standard; the body design standard has different standards for different types of cars, which belongs to the existing technology, the same below)

The bottom plate is also provided with a front beam positioning and pressing device for pressing and positioning the first cross beam and the second cross beam, and a front longitudinal beam flip positioning press for pressing and positioning the left front longitudinal beam and the right front longitudinal beam. tightening device;

The slide plate is provided with a rear support group supporting each sub-assembly of the rear half of the car body floor, and the rear support group is provided with a rear limit surface group; (the rear support group and the rear limit surface group is consistent with the body design basis)

The slide plate is also provided with a rear beam positioning and pressing device for pressing and positioning the third beam and the fourth beam;

Beside the left front longitudinal beam and the right front longitudinal beam, there is also a front longitudinal beam auxiliary pressing device for preventing the welding deformation of the front longitudinal beam and the cowl bulge assembly;

A rear longitudinal beam auxiliary pressing device for preventing welding deformation of the rear longitudinal beam and the rear wheel house assembly is also provided between the left rear longitudinal beam and the right rear longitudinal beam.

Further, the front crossbeam positioning and pressing device includes a front crossbeam support, the bottom end of the front crossbeam support is connected to the bottom plate, and the top end is provided with a first connecting plate and a first support; above the first connecting plate and the first support A first pressing plate is provided; a first guide post is provided on the first connecting plate, the first guide post passes through the first pressing plate, and a first pressing block is arranged on the top, and the first pressing block and the second pressing block The top of a guide post is threaded; a first pin is provided between the first pressure plate and the first support; a first positioning block is provided on the first support. In this way, the front beam is positioned by the first positioning block and the first bolt, and then the first pressing block is rotated under the support of the first connecting plate to compress the first bolt, thereby compressing the front beam, that is, pressing The front half of the tight body floor consists of one of the first cross member and the second cross member. , The front crossbeam positioning and pressing device is provided with two groups of four in total, located at both ends of the first crossbeam and the second crossbeam respectively.

Still further, the first connecting plate is provided with a first limiting groove, and the first pressing plate is located in the first limiting groove; the first pressing plate is provided with a first chute, and the first pressing plate is A guide post passes through the first chute. In this way, there is an appropriate margin that can be adjusted during the pressing process, so as to ensure that the benchmark of the front beam is consistent with the design benchmark of the vehicle body.

Further, the front longitudinal beam flip positioning and pressing device includes a front longitudinal beam support, the bottom end of the front longitudinal beam support is connected to the bottom plate, and the top end is provided with a second connecting plate and a second support; the second support passes through the first A pin shaft is connected to one end of the second pressure plate, and the second pressure plate swings around the first pin shaft between the second connecting plate and the second support; The first push rod of the beam, the first push rod is threadedly connected with the second support; the second connecting plate is provided with a first rotating rod, and the first rotating rod is connected with the second connecting plate threaded connection; the top end of the first rotating rod is in contact with the second pressing plate; the second support is provided with a second positioning block. In this way, the front beam is pre-positioned by the second positioning block and the first push rod, the first rotary rod is unscrewed, the front longitudinal beam is inclined to the inside, and then the cowl bulge assembly is dropped and its position is limited, and the first screw is tightened. The rotary rod pushes against the second pressure plate, so that the front longitudinal beam and the front wall bulge assembly are pressed tightly by the second pressure plate and the first push rod, that is, the left front longitudinal beam and the right front longitudinal beam are pressed against the front wall bulge assembly. .

Still further, a first limiting block is provided between the second pressing plate and the second support. In this way, it can effectively prevent the incorrect installation of the front longitudinal beam caused by excessive tightening of the first rotary rod, resulting in the inconsistency between the reference of the front longitudinal beam and the design reference of the vehicle body.

Further, the rear crossbeam positioning and pressing device includes a rear crossbeam support, the bottom end of the rear crossbeam support is connected to the slide plate, and the top end is provided with a third connecting plate and a third support; above the third connecting plate and the third support A third pressing plate is provided; a second guide post is provided on the third connecting plate, the second guide post passes through the third pressing plate, and a second pressing block is arranged on the top, and the second pressing block is connected with the first pressing block. The tops of the two guide posts are threaded; a second pin is provided between the third pressure plate and the third support; a third positioning block is provided on the top of the rear beam support, and a rear A crossbeam positioning pin, the rear crossbeam positioning pin is parallel to the second bolt. In this way, the rear cross beam is positioned by the third positioning block, the rear cross beam positioning pin and the second latch, and then the second pressing block is rotated under the support of the third connecting plate to compress the second latch, thereby compressing the rear cross beam , that is, the third crossbeam and the fourth crossbeam, which are one of the components of the rear half of the compact car body floor. The front crossbeam positioning and pressing device is provided with two groups of four in total, located at both ends of the third crossbeam and the fourth crossbeam respectively.

Still further, the third connecting plate is provided with a second limiting groove, and the third pressing plate is located in the second limiting groove; the third pressing plate is provided with a second sliding groove, and the first The two guide posts pass through the second sliding slot. In this way, there is an appropriate margin that can be adjusted during the pressing process, so as to ensure that the benchmark of the rear beam is consistent with the design benchmark of the vehicle body.

Further, the front longitudinal beam auxiliary pressing device includes a front longitudinal beam auxiliary support, the bottom end of the front longitudinal beam auxiliary support is connected to the slide plate, and the top end is provided with a fourth connecting plate and a fourth support; the fourth support passes through The second pin is connected to one end of the fourth pressing plate, and the fourth pressing plate swings around the second pin between the fourth connecting plate and the fourth support; the fourth connecting plate is provided with a second rotary rod , the second rotating rod is threadedly connected with the fourth connecting plate; the top end of the second rotating rod is in contact with the fourth pressing plate; the top end of the fourth support is provided with a fourth positioning block. In this way, the front beam is pre-positioned by the fourth positioning block, the second screw rod is unscrewed, the front longitudinal beam is inclined to the inside, then the cowl bulge assembly is dropped and its position is limited, and the second screw rod is tightened to tighten the second screw rod. Four pressure plates, so that a certain external force is applied to the front longitudinal beam through the fourth pressure plate, so that the front longitudinal beam will not be deformed when it is welded to the front wall bulge assembly, that is, the left front longitudinal beam and the right front longitudinal beam are connected to the front wall During the welding process of the bulge assembly, no welding deformation will occur.

Still further, a second limiting block is provided between the fourth pressing plate and the fourth support. In this way, it can effectively prevent the incorrect installation of the front longitudinal beam caused by excessive tightening of the second rotary rod, resulting in the inconsistency between the reference of the front longitudinal beam and the design reference of the vehicle body.

Still further, the front longitudinal beam auxiliary support top is also provided with a front longitudinal beam positioning pin, and the front longitudinal beam positioning pin is fixed on the top of the front longitudinal beam auxiliary support through a first connecting frame. In this way, the front side beam, that is, the left front side beam and the right front side beam are further limited to prevent the front side beam from moving, and ensure that the benchmark of the front side beam is consistent with the design benchmark of the vehicle body.

Further, the rear longitudinal beam auxiliary pressing device includes a rear longitudinal beam auxiliary support and a telescopic auxiliary support rod; the bottom end of the rear longitudinal beam auxiliary support is connected to the slide plate, and the top is provided with a fifth connecting plate. An opening is provided on the fifth connecting plate, and a fifth limiting block and a sixth limiting block are arranged on two surfaces of the opening; the auxiliary support rod is located between the opposing sixth positioning blocks. In this way, the rear left side beam and the rear right side beam are clamped at the same time by using the auxiliary support bar and the fifth connecting plate, thereby effectively preventing the rear side beam, that is, the rear left side beam, the rear right side beam and the rear wheel house assembly welding deformation.

Still further, the auxiliary support rod includes a rotating section and a fixed section, and the rotating section extends into the fixed section through a threaded connection; the ends of the rotating section and the fixed section are both spherically hinged with movable ends; The rotating section is also provided with a booster rod.

Still further, the fifth connecting plate is also provided with a rear longitudinal beam positioning pin, and the rear longitudinal beam positioning pin is fixed on one side of the fifth connecting plate through the second connecting frame. In this way, the rear longitudinal beam, that is, the left rear longitudinal beam and the right rear longitudinal beam are further limited to prevent the rear longitudinal beam from moving, and ensure that the benchmark of the rear longitudinal beam is consistent with the design benchmark of the vehicle body.

Further, clamping devices for the front wall bulge assembly and the rear wheel house assembly are provided on the base plate and the slide plate, and the clamping devices for the front wall bulge assembly and the rear wheel house assembly include a base, and the base A sixth connecting plate is provided on the top of the seat, and a fifth pressing plate is arranged above the sixth connecting plate. One end of the fifth pressing plate is connected to the sixth connecting plate through a third pin shaft, and the fifth pressing plate can be wound around the third pin. The shaft rotates; the fifth pressing plate is also provided with a third rotating rod, the third rotating rod passes through the fifth pressing plate, and the top is screwed to the sixth connecting plate; the fifth pressing plate is connected to the base There is also a sixth limit block between them. In this way, unscrew and turn over the fifth pressure plate, when the front wall bulge assembly and the rear wheel house assembly are dropped, use the sixth limit block to position, then turn over the fifth pressure plate, and tighten the third rotary rod, thereby compressing the front Drum package assembly and rear wheel housing assembly.

The beneficial effect of the present invention is: the tooling of 20 small sub-assemblies is realized on one tooling fixture, and what each tooling adopts is the design basis of the body, and the longitudinal beam is clamped laterally during welding, so that the body of the bulletproof vehicle can be effectively controlled Welding deformation ensures that the accuracy of the body skeleton meets the assembly requirements of the vehicle, reduces the labor intensity of the operator, and improves work efficiency.

Description of drawings

Figure 1 shows the twenty sub-assemblies that need to be positioned and installed on the floor welding tool;

Fig. 2 is a three-dimensional schematic diagram of the support member and the limit surface of the bulletproof load-bearing car body floor welding tooling fixture disclosed by the present invention,

Fig. 3 is a top view schematic diagram of the support member and the limit surface of the bulletproof load-bearing car body floor welding tooling fixture disclosed by the present invention;

Fig. 4 to Fig. 14 are the three-dimensional schematic diagrams of the support member and the limit surface of the front half of the car body floor, wherein, the figures of the same label are the same part, a and b represent different viewing angle states, and the parts in Fig. 4 to Fig. 13 are Symmetrically arranged left and right, the parts in Figure 14 are located in the middle of the bottom plate;

Fig. 15 to Fig. 19 are three-dimensional schematic diagrams of the support member and the limit surface of the rear half of the car body floor, wherein, the figures with the same label are the same part, a and b represent different viewing angle states, and the parts in Fig. 15 to Fig. 18 are It is arranged symmetrically on the left and right, and Figure 19 is located in the middle of the skateboard;

Fig. 20 is a schematic perspective view of the bulletproof load-bearing car body floor welding fixture disclosed by the present invention,

Fig. 21 is a schematic top view of the bulletproof load-bearing car body floor welding jig disclosed by the present invention;

Fig. 22 is a three-dimensional schematic diagram of the positioning clamping device and auxiliary device of the bulletproof load-bearing car body floor welding jig disclosed by the present invention,

Fig. 23 is a top view schematic diagram of the positioning clamping device and auxiliary device of the bulletproof load-bearing car body floor welding jig disclosed by the present invention;

Fig. 24 is a three-dimensional schematic diagram of the front beam positioning and pressing device of the bulletproof load-bearing car body floor welding jig disclosed by the present invention;

Fig. 25 is a three-dimensional schematic view of the first support of the front beam positioning and pressing device;

Fig. 26 is a three-dimensional schematic diagram of the flipping, positioning and pressing device of the front longitudinal beam of the bulletproof load-bearing car body floor welding jig disclosed by the present invention;

Fig. 27 is a three-dimensional schematic diagram of the rear beam positioning and pressing device of the bulletproof load-bearing car body floor welding jig disclosed in the present invention.

Fig. 28 is a three-dimensional schematic diagram II of the rear beam positioning and pressing device of the bulletproof load-bearing car body floor welding jig disclosed by the present invention;

Fig. 29 is a three-dimensional schematic diagram of the front longitudinal beam auxiliary pressing device of the bulletproof load-bearing car body floor welding jig disclosed in the present invention.

Fig. 30 is a three-dimensional schematic diagram II of the front longitudinal beam auxiliary pressing device of the bulletproof load-bearing car body floor welding jig disclosed by the present invention;

Fig. 31 is a three-dimensional schematic diagram of the rear longitudinal beam auxiliary pressing device of the bulletproof load-bearing car body floor welding fixture disclosed by the present invention,

Fig. 32 is an exploded schematic view of the auxiliary support rod of the rear longitudinal beam auxiliary pressing device disclosed in the present invention;

Figure 33 is a three-dimensional schematic diagram of the clamping device of the front wall bulge assembly and the rear wheel house assembly,

Fig. 34 is a perspective view II of the clamping device of the front wall bulge assembly and the rear wheel house assembly.

In the picture: Front wall bulge assembly 1', rear wheel house assembly 2', left front longitudinal beam 3', right front longitudinal beam 4', left rear longitudinal beam 5', right rear longitudinal beam 6', first cross beam 7' , the second crossbeam 8', the third crossbeam 9', the fourth crossbeam 10', the left front wheelhouse 11', the right front wheelhouse 12', the first crossbeam left connecting bracket 13', the first crossbeam right connecting bracket 14' , the second beam left connecting bracket 15', the second beam right connecting bracket 16', the third beam left connecting bracket 17', the third beam right connecting bracket 18', the fourth beam left connecting bracket 19', the fourth beam right Connecting bracket 20';

Supports 101-111 in the first half, supports 201-205 in the second half, front limiting surface group 301, and rear limiting surface group 401;

Bottom plate 1, slide plate 2, slide rail 3, front beam positioning and pressing device 4, front longitudinal beam overturning positioning and pressing device 5, rear beam positioning and pressing device 6, front longitudinal beam auxiliary pressing device 7, rear longitudinal beam auxiliary pressing device Clamping device 8, auxiliary support bar 9, front wall bulge assembly and rear wheel cover assembly clamping device 10;

Among them: the front beam support 41, the first connecting plate 42, the first limit groove 421, the first support 43, the V-shaped groove 431, the first pressure plate 44, the first chute 441, the first guide post 45, the first A pressing block 46, a first latch 47, a first positioning block 48;

Front longitudinal beam support 51, second connecting plate 52, second support 53, first pin shaft 54, second pressure plate 55, first push rod 56, first rotating rod 57, second positioning block 58, first Limiting block 59;

Rear beam support 61, third connecting plate 62, third support 63, third pressure plate 64, second guide post 65, second pressing block 66, second pin 67, third positioning block 68, rear beam positioning pin 681;

Front longitudinal beam auxiliary support 71, fourth connecting plate 72, fourth support 73, second pin shaft 74, fourth pressure plate 75, second rotating rod 76, four positioning blocks 77, second limiting block 78, front Longitudinal beam positioning pin 79, first connecting frame 710;

Rear longitudinal beam auxiliary support 81, fifth connecting plate 82, opening 83, fifth limiting block 84, sixth limiting block 85, rotating section 91, thread 911, fixed section 92, movable end 93, booster rod 94;

The base 1001 , the sixth connecting plate 1002 , the fifth pressing plate 1003 , the third pin shaft 1004 , the third rotating rod 1005 , and the sixth limiting block 1006 .

Detailed ways

As shown in Figure 1, the figure shows twenty sub-assemblies included in the car body floor. Beam 3', right front longitudinal beam 4', left rear longitudinal beam 5', right rear longitudinal beam 6', first beam 7', second beam 8', third beam 9', fourth beam 10', left front Wheel cover 11', right front wheel cover 12', first crossbeam left connecting bracket 13', first crossbeam right connecting bracket 14', second crossbeam left connecting bracket 15', second crossbeam right connecting bracket 16', third Crossbeam left connecting bracket 17', the third crossbeam right connecting bracket 18', the fourth crossbeam left connecting bracket 19', the fourth crossbeam right connecting bracket 20'; Tooling is carried out separately on the tooling platform, and then each sub-assembly is assembled into a car body floor. However, due to the large number of assembly sub-assemblies, this leads to many assembly and positioning points, so the assembly is difficult; at the same time, due to the welding connection between the front wall bulge assembly 1' and the left front longitudinal beam 3' and the right front longitudinal beam 4' The welding connection between the rear wheel house assembly 2' and the left rear longitudinal beam 5' and the right rear longitudinal beam 6' is relatively long, so it is easy to cause welding deformation, thereby affecting the safety performance.

In view of the deficiencies in the existing tooling method, the bulletproof load-bearing type car body floor welding tooling method designed by the present invention comprises the following steps:

The first crossbeam 7' and the second crossbeam 8' are positioned and assembled; the first crossbeam left connecting bracket 13', the first crossbeam right connecting bracket 14', the second crossbeam left connecting bracket 15', and the second crossbeam right connecting bracket 16' are respectively assembled with the first beam 7' and the second beam 8'; pre-position the left front side beam 3' and the right front side beam 4', turn them inward at a certain angle, and drop the cowl bulge assembly 1' , turn the left front side beam 3' and the right front side beam 4' outward, and connect the left front side beam 3' and the right front side beam 4' with the first crossbeam left connecting bracket 13', the first crossbeam right connecting bracket 14', the second Assemble the left connecting bracket 15' of the crossbeam and the right connecting bracket 16' of the second crossbeam; weld the cowl bulge assembly 1' with the left front longitudinal beam 3' and the right front longitudinal beam 4', including transversely clamping the left front longitudinal beam 3' before welding and the right front longitudinal beam 4' to prevent the welding deformation of the left front longitudinal beam 3' and the right front After the first crossbeam 7' and the second crossbeam 8' are assembled, carry out lateral clamping on the left front longitudinal beam 3' and the right front longitudinal beam 4', and then connect the left front longitudinal beam 3' and the right front longitudinal beam 4' with the cowl bulge assembly 1 ' welding to complete the first half of the tooling. Flip the left front longitudinal beam 3' and the right front longitudinal beam 4' to the inside at a certain angle, generally no more than 40°, so that the cowl bulge assembly 1' can be easily dropped and the tooling can be carried out smoothly.

Position and assemble the third beam 9' and the fourth beam 10'; through the third beam left connecting bracket 17', the third beam right connecting bracket 18', the fourth beam left connecting bracket 19', the fourth beam right connecting bracket 20 'Assemble the left rear longitudinal beam 5' and the right rear longitudinal beam 6' with the third crossbeam 9' and the fourth crossbeam 10'; assemble the rear wheel house assembly 2' with the left rear longitudinal beam 5' and the right rear longitudinal beam 6 'Welding, including the step of horizontally clamping the left rear longitudinal beam 5' and the right rear longitudinal beam 6' before welding, so as to prevent the welding deformation of the left rear longitudinal beam 5' and the right rear longitudinal beam 6'; so far, the tooling of the second half is completed That is to say, after the left rear longitudinal beam 5' and the right rear longitudinal beam 6' are assembled with the third beam 9' and the fourth beam 10', the left rear longitudinal beam 5' and the right rear longitudinal beam 6' are transversely Clamp, and then weld the left rear longitudinal beam 5' and the right rear longitudinal beam 6' with the rear wheel house assembly 2' to complete the tooling of the second half. Because there is no interference between the rear wheel house assembly 2 ' and the left rear longitudinal beam 5 ' and the right rear longitudinal beam 6 ', the process of falling is smooth, and the operation of overturning is not required, and the tooling can be directly carried out.

Finally, butt weld the front and rear halves.

Further, the assembly welding is completed on a jig.

Further, when welding the cowl bulge assembly 1', the welding points are symmetrical, and the welding operation of the symmetrical welding points is carried out at the same time; similarly, when the rear wheel house assembly 2' is welded, the welding points are symmetrical, and the symmetrical welding The spot welding operation is carried out simultaneously. That is to say, the left and right front longitudinal beams 3', 4' are welded to the front wall bulge assembly 1' simultaneously, and the left and right rear longitudinal beams 5', 6' are welded to the rear wheelhouse assembly 2' simultaneously. In this way, it is possible to avoid always producing asymmetrical stress during the welding process between the longitudinal beams 3', 4', 5', 6' and the car body floor, thereby controlling the welding deformation.

Further, it provides ample and comfortable operating space for the operation, improves the welding quality and labor efficiency, and adopts high-position operation.

In order to further explain the content of the present invention, the bulletproof load-bearing type car body floor welding jig proposed by the present invention will be described below in conjunction with the accompanying drawings, and the above method is applied in the jig.

Before explaining the content of the present invention, as shown in Figure 2 and Figure 3, the support in the fixture and the limit surface on the support are shown in these two figures, wherein the support 101～ 111 is located on the floor 1, and the supports 201-205 in the second half are located on the skateboard 2; the support 101 and the support 205 are located in the middle of the fixture, and the rest are symmetrically arranged; the arrangement of the supports 101-111 and the supports 201-205 The position and requirements are consistent with the design basis of the body. Compared with the existing fixture, it is only concentrated on one fixture and no other changes have been made. Figures 4 to 19 show the three-dimensional schematic diagrams of each support (each picture shows two angles of view), and the limiting surface is also shown together. These are the general design methods and methods in the technical field of automotive floor tooling and fixture design. structure, which will not be further elaborated here. At the same time, it should be noted that the body design benchmark is determined according to different design requirements, and it is also the scope of the existing technology, so it will not be elaborated here.

As shown in Fig. 20 and Fig. 21, the overall structure of the fixture of the present invention is shown in the figure, and there are too many contents designed in the figure, and the content of the invention of the present invention will be explained one by one below:

As shown in Fig. 2 and Fig. 3, Fig. 22 and Fig. 23, the bulletproof load-bearing car body floor welding fixture designed by the present invention includes a base plate 1, which is characterized in that: the base plate 1 is provided with a slide plate 2, the A slide rail 3 is provided between the slide plate 2 and the base plate 1; the base plate 1 is provided with a front support group 101-111 supporting each sub-assembly of the front half of the car body floor, and the front support group 101-111 is provided with The front limiting surface group 301, the front supporting member group 101-111 and the front limiting surface group 301 are consistent with each other; the bottom plate 1 is also provided with a set for pressing the first crossbeam 7' and the second crossbeam 8' and The positioned front beam positioning and pressing device 4, and the front side beam flip positioning and pressing device 5 for pressing and positioning the left front side beam and the right front side beam; The rear support groups 201-205 of each sub-assembly, the rear support groups 201-205 are provided with a rear limit surface group, and the rear support group 201-205 is consistent with the rear limit surface group; The slide plate 2 is also provided with a rear crossbeam positioning and pressing device 6 for pressing and positioning the third crossbeam 9' and the fourth crossbeam 10'; Auxiliary pressing device 7 for the front longitudinal beam to prevent the welding deformation of the front longitudinal beam 3', 4' and the front wall bulge assembly 1'; between the left rear longitudinal beam 5' and the right rear longitudinal beam 6' there is also a A rear longitudinal beam auxiliary pressing device 8 for preventing welding deformation of the rear longitudinal beams 5', 6' and the rear wheel house assembly 2'. In this way, these components are used to position and assemble the front and rear parts on a fixture. After the front and rear parts are respectively tooled, the slide plate 2 is pushed to complete the butt welding of the front and rear parts.

As shown in Figure 24, further, the front beam positioning and pressing device 4 includes a front beam support 41, the bottom end of the front beam support 41 is connected to the bottom plate, and the top end is provided with a first connecting plate 42 and a first support 43 The first connecting plate 42 and the first bearing 43 are provided with a first pressing plate 44; the first connecting plate 42 is provided with a first guide post 45, and the first guiding post 45 passes through the first pressing plate 44, The top is provided with a first pressing block 46, and the first pressing block 46 is threadedly connected with the top of the first guide post 45; a first latch 47 is provided between the first pressing plate 44 and the first support 43; The first support 43 is provided with a first positioning block 48 . In this way, the front crossbeam—that is, the first crossbeam 7 ′ and the second crossbeam 8 ′ is positioned by the first positioning block 48 and the first latch 47 , and then the first pressing force is rotated under the support of the first connecting plate 42 . The tightening block 46 compresses the first bolt 47, thereby compressing the front crossbeam, that is, compressing the first crossbeam 7' and the second crossbeam 8', which are one of the components of the front half of the car body floor. , The front crossbeam positioning and pressing device 4 is provided with two groups of four in total, which are respectively located at the two ends of the first crossbeam 7' and the second crossbeam 8'.

Still as shown in Figure 24, further, the first connecting plate 42 is provided with a first limiting groove 421, and the first pressing plate 44 is located in the first limiting groove 421; the first pressing plate 44 is provided with a first chute 441 , and the first guide post 45 passes through the first chute 441 . In this way, there is an appropriate margin that can be adjusted during the pressing process, so as to ensure that the benchmark of the front beam is consistent.

As shown in FIG. 25 , a V-shaped groove 431 is provided at the top of the first support 43 , and the first pin 47 can be positioned in the above-mentioned V-shaped groove. Similarly, such a structure is also provided on the first pressing plate 44, so as to cooperate with the first support to press the first pin 47, which will not be shown in the drawings here.

As shown in Figure 26, further, the front longitudinal beam flip positioning and pressing device 5 includes a front longitudinal beam support 51, the bottom end of the front longitudinal beam support 51 is connected to the bottom plate, and the top end is provided with a second connecting plate 52 and a second connecting plate 52. Two bearings 53; the second bearing 53 is connected to one end of the second pressing plate 55 through the first pin shaft 54, and the second pressing plate 55 is connected between the second connecting plate 52 and the second bearing 53 around the first pin shaft 54 swing between; the second support 53 is provided with a first push rod 56 for supporting the front longitudinal beam, and the first push rod 56 is threadedly connected with the second support 53; the second connection 52 plate is provided with a first rotating rod 57, the first rotating rod 57 is threadedly connected with the second connecting plate 52; the top of the first rotating rod 57 is in contact with the second pressing plate 55; The second support 53 is provided with a second positioning block 58 . In this way, the front beam is pre-positioned by the second positioning block 58 and the first push rod 56, the first rotary rod 56 is unscrewed, the front longitudinal beam is inclined to the inside, and then the cowl bulge assembly 1' is dropped and its position is limited. , tighten the first rotary rod 57 against the second pressure plate 55, so that the front longitudinal beam and the cowl bulge assembly 1' are compressed by the second pressure plate 55 and the first jack rod 56, that is, the left front longitudinal beam 3 ' and the right front longitudinal beam 4' and the cowl bulge assembly 1' are compressed. Still further, a first limiting block 59 is provided between the second pressing plate 55 and the second support 53 . In this way, it can effectively prevent the improper installation of the front longitudinal beam caused by excessive tightening of the first rotary rod 57, resulting in the inconsistency between the front longitudinal beam reference and the vehicle body design reference.

As shown in Figure 27 and Figure 28, further, the rear beam positioning and pressing device 6 includes a rear beam support 61, the bottom end of the rear beam support 61 is connected to the slide plate 2, and the top end is provided with a third connecting plate 62 and a second connecting plate 62. Three supports 63; the third connecting plate 62 and the third supporting plate 63 are provided with a third pressing plate 64; the third connecting plate 62 is provided with a second guide post 65, and the second guide post 65 passes through the first Three pressing plates 64, the top is provided with a second pressing block 66, and the second pressing block 66 is screwed to the top of the second guide post 65; between the third pressing plate 64 and the third support 63, a second Latch 67; the top of the rear beam support 61 is also provided with a third positioning block 68, and the third positioning block 68 is provided with a rear beam positioning pin 681, and the rear beam positioning pin 681 is connected with the second latch 67 parallel. In this way, the rear beam is positioned by the third positioning block 68, the rear beam positioning pin 681 and the second latch 67, and then the second pressing block 66 is rotated under the support of the third connecting plate 62 to compress the second latch 67. , so as to compress the rear crossbeam, that is, to compress the third crossbeam 9' and the fourth crossbeam 10', which are one of the components of the rear half of the car body floor. According to the design criteria of the vehicle body, the front crossbeam positioning and pressing device 6 is provided with two groups of four in total, which are respectively located at the two ends of the third crossbeam 9' and the fourth crossbeam 10'.

Still as shown in Figure 27 and Figure 28, further, the third connecting plate 62 is provided with a second limiting groove 621, and the third pressing plate 64 is located in the second limiting groove 621; The third pressing plate 64 is provided with a second chute 641 , and the second guide post 65 passes through the second chute 641 . In this way, there is an appropriate margin that can be adjusted during the pressing process, so as to ensure that the benchmark of the rear beam is consistent with the design benchmark of the vehicle body.

The third support 63 cooperates with the third pressing plate 64 to press and position the second pin 67 , and its structure is consistent with that of the first support 43 and the first pressing plate 44 , which will not be repeated here.

As shown in Figure 29 and Figure 30, further, the front longitudinal beam auxiliary pressing device 7 includes a front longitudinal beam auxiliary support 71, the bottom end of the front longitudinal beam auxiliary support 71 is connected with the slide plate 2, and the top end is provided with a fourth The connecting plate 72 and the fourth support 73; the fourth support 73 is connected to one end of the fourth pressing plate 75 through the second pin shaft 74, and the fourth pressing plate 75 is connected between the fourth connecting plate 72 and the fourth pressing plate 75 around the second pin shaft 74 Swing between the fourth bearings 73; the fourth connecting plate 75 is provided with a second rotating rod 76, and the second rotating rod 76 is threadedly connected with the fourth connecting plate 72; the second rotating rod 76 The top end is in contact with the fourth pressing plate 75 ; the top end of the fourth support 73 is provided with a fourth positioning block 77 . In this way, the front beam is pre-positioned by the fourth positioning block 77, the second screw rod 76 is unscrewed, the front longitudinal beam is tilted inwardly, then the cowl bulge assembly 1' is dropped and its position is limited, and the second screw rod is tightened. The rod 76 pushes against the fourth pressure plate 75, so that a certain external force is applied to the front longitudinal beam through the fourth pressure plate 75, so that the front longitudinal beam will not be deformed when it is welded with the front wall bulge 1', that is, when the left front During the welding process of the longitudinal beam 3', the right front longitudinal beam 4' and the cowl bulge assembly 1', welding deformation will not occur. Still further, a second limiting block 78 is provided between the fourth pressing plate 75 and the fourth support 77 . In this way, it can effectively prevent the improper installation of the front longitudinal beam caused by excessive tightening of the second rotary rod 76, resulting in the inconsistency between the front longitudinal beam reference and the vehicle body design reference. Still further, the front longitudinal beam auxiliary support top 71 is also provided with a front longitudinal beam positioning pin 79 , and the front longitudinal beam positioning pin 79 is fixed on the top of the front longitudinal beam auxiliary support 71 through a first connecting frame 710 . Like this, to front side beam, namely left front side beam 3 ' and right front side beam 4 ' further limit, prevent the front side beam from moving, guarantee that the benchmark of front side beam is consistent with vehicle body design benchmark.

As shown in Figures 31 and 32, further, the rear longitudinal beam auxiliary pressing device 8 includes a rear longitudinal beam auxiliary support 81 and a telescopic auxiliary support rod 9; 2 connection, the top is provided with a fifth connecting plate 82, an opening 83 is provided on the fifth connecting plate 82, and a fifth limiting block 84 and a sixth limiting block 85 are arranged on both surfaces of the opening 83; The auxiliary support rod 9 is located between the opposing sixth positioning blocks 85 . In this way, the rear left longitudinal beam 5' and the rear right longitudinal beam 6' are simultaneously clamped by the auxiliary support rod 9 and the fifth connecting plate 82, thereby effectively preventing the rear longitudinal beam, that is, the rear left longitudinal beam 5' and the rear right longitudinal beam from Welding deformation of longitudinal beam 6' and rear wheel house assembly 2'. Still further, the auxiliary support rod 9 includes a rotating section 91 and a fixed section 92, and the rotating section 91 is connected through a thread 911 and extends into the fixed section 92; the ends of the rotating section 91 and the fixed section 92 are spherical A movable end 93 is hinged; the rotating section 91 is also provided with a booster rod 94 . Still further, the fifth connecting plate 82 is also provided with a rear longitudinal beam positioning pin 86 , and the rear longitudinal beam positioning pin is fixed on one side of the fifth connecting plate 82 through the second connecting frame 87 through the second connecting frame 87 . In this way, the rear longitudinal beam, that is, the left rear longitudinal beam 5 ' and the right rear longitudinal beam 6 ' are further limited to prevent the rear longitudinal beam from moving, and ensure that the benchmark of the rear longitudinal beam is consistent with the vehicle body design benchmark.

As shown in Fig. 33 and Fig. 34, the clamping device 10 of the cowl bulge assembly and the rear wheel house assembly includes a base 1001, and a sixth connecting plate 1002 is arranged on the top of the base 1001, and the sixth connecting plate 1002 A fifth pressing plate 1003 is provided above, and one end of the fifth pressing plate 1003 is connected to the sixth connecting plate 1002 through a third pin shaft 1004, and the fifth pressing plate 1003 can rotate around the third pin shaft 1004; the fifth pressing plate 1003 There is also a third rotating rod 1005 on the top, the third rotating rod 1005 passes through the fifth pressing plate 1003, and the top is screwed to the sixth connecting plate 1002; between the fifth pressing plate 1003 and the base 1001 A sixth limit block 1006 is also provided. In this way, unscrew and turn over the fifth pressing plate 1003, when the cowl bulge assembly 1' and the rear wheel housing assembly 2' are dropped, use the sixth limit block 1006 to position, then turn over the fifth pressing plate 1003, tighten the third Rotate the rod 1005, thereby compressing the front wall bulge assembly 1' and the rear wheel housing assembly 2'.

Claims (10)

1. A method for welding a bulletproof load-bearing car body floor, which comprises the following steps: Position and assemble the first crossbeam and the second crossbeam; assemble the left connecting bracket of the first crossbeam, the right connecting bracket of the first crossbeam, the left connecting bracket of the second crossbeam, and the right connecting bracket of the second crossbeam with the first crossbeam and the second crossbeam respectively ; Pre-position the left front side beam and the right front side beam, and turn them inward at a certain angle, drop the cowl bulge assembly, turn the left front side beam and the right front side beam outward, and align the left front side beam and the right front side beam with the Assemble the left connecting bracket of the first crossbeam, the right connecting bracket of the first crossbeam, the left connecting bracket of the second crossbeam, and the right connecting bracket of the second crossbeam; weld the cowl bulge assembly with the left front longitudinal beam and the right front longitudinal beam, including the transverse clamp before welding The step of tightening the left front longitudinal beam and the right front longitudinal beam to prevent the welding deformation of the left front longitudinal beam and the right front longitudinal beam; so far the tooling of the first half is completed; The third crossbeam and the fourth crossbeam are positioned and assembled; the left rear longitudinal beam and the right rear longitudinal beam are connected to Assemble the third beam and the fourth beam; weld the rear wheel house assembly with the left rear longitudinal beam and the right rear longitudinal beam, including the step of clamping the left rear longitudinal beam and the right rear longitudinal beam The beam and the right rear longitudinal beam are welded and deformed; so far, the tooling of the second half is completed; Butt weld the front and back halves. 2. The method for welding the floor of a bulletproof load-bearing vehicle body according to claim 1, characterized in that: the assembly welding is completed on a jig. 3. The method for welding the floor of a bulletproof load-bearing vehicle body according to claim 1, characterized in that: the welding of the cowl bulge assembly to the left front longitudinal beam and the right front longitudinal beam is to simultaneously weld the left and right front longitudinal beams to the cowl bulge Assembly welding: the welding of the rear wheel house assembly with the left rear longitudinal beam and the right rear longitudinal beam is to weld the left and right rear longitudinal beams with the rear wheel house assembly at the same time. 4. A bulletproof load-bearing car body floor welding fixture, including a base plate, characterized in that: the base plate is provided with a slide plate, and a slide rail is provided between the slide plate and the base plate; The base plate is provided with a front support member group supporting each sub-assembly of the front half of the car body floor, and the front support member group is provided with a front limiting surface group; The bottom plate is also provided with a front beam positioning and pressing device for pressing and positioning the first cross beam and the second cross beam, and a front longitudinal beam flip positioning press for pressing and positioning the left front longitudinal beam and the right front longitudinal beam. tightening device; The slide plate is provided with a rear support member group supporting each sub-assembly of the rear half of the car body floor, and the rear support member group is provided with a rear limit surface group; The slide plate is also provided with a rear beam positioning and pressing device for pressing and positioning the third beam and the fourth beam; Beside the left front longitudinal beam and the right front longitudinal beam, there is also a front longitudinal beam auxiliary pressing device for preventing the welding deformation of the front longitudinal beam and the cowl bulge assembly; A rear longitudinal beam auxiliary pressing device for preventing welding deformation of the rear longitudinal beam and the rear wheel house assembly is also provided between the left rear longitudinal beam and the right rear longitudinal beam. 5. The bulletproof load-bearing car body floor welding fixture according to claim 4, characterized in that: the front beam positioning and pressing device includes a front beam support, the bottom end of the front beam support is connected to the bottom plate, and the top end is provided with The first connecting plate and the first support; the first pressing plate is arranged above the first connecting plate and the first support; the first connecting plate is provided with a first guide post, and the first guide post passes through the first Pressing plate, the top is provided with a first pressing block, and the first pressing block is threadedly connected with the top of the first guide post; a first pin is provided between the first pressing plate and the first support; the first support The seat is provided with a first positioning block. 6. The bulletproof bearing type car body floor welding fixture according to claim 4, characterized in that: the front longitudinal beam flip positioning and pressing device comprises a front longitudinal beam support, the bottom end of the front longitudinal beam support is connected to the bottom plate , the top end is provided with a second connecting plate and a second support; the second support is connected to one end of the second pressing plate through the first pin shaft, and the second pressing plate is connected between the second connecting plate and the second pressing plate around the first pin shaft. swing between the supports; the second support is provided with a first push rod used to withstand the front longitudinal beam, and the first push rod is threadedly connected with the second support; the second connecting plate A first rotating rod is provided, and the first rotating rod is threadedly connected with the second connecting plate; the top end of the first rotating rod is in contact with the second pressure plate; the second support is provided with a second positioning piece. 7. The bulletproof bearing type car body floor welding fixture according to claim 4, characterized in that: the rear beam positioning and pressing device includes a rear beam support, the bottom end of the rear beam support is connected to the slide plate, and the top end is provided with The third connecting plate and the third support; the third connecting plate and the third support are provided with a third pressing plate; the third connecting plate is provided with a second guide post, and the second guide post passes through the third Pressing plate, the top is provided with a second pressing block, and the second pressing block is threadedly connected to the top of the second guide post; a second pin is provided between the third pressing plate and the third support; the rear beam support A third positioning block is also provided on the top of the seat, and a rear beam positioning pin is arranged on the third positioning block, and the rear beam positioning pin is parallel to the second bolt. 8. The bulletproof bearing type car body floor welding fixture according to claim 4, characterized in that: said front longitudinal beam auxiliary pressing device comprises a front longitudinal beam auxiliary support, and the bottom end of the front longitudinal beam auxiliary support is connected with a slide plate connection, the top end is provided with a fourth connecting plate and a fourth support; the fourth support is connected to one end of the fourth pressing plate through the second pin shaft, and the fourth pressing plate is connected between the fourth connecting plate and the first pressing plate around the second pin shaft. Swing between the four supports; the fourth connecting plate is provided with a second rotating rod, and the second rotating rod is threadedly connected with the fourth connecting plate; the top end of the second rotating rod is connected with the fourth pressing plate contact; the top of the fourth support is provided with a fourth positioning block. 9. The bulletproof bearing type car body floor welding fixture according to claim 4, characterized in that: the rear longitudinal beam auxiliary pressing device comprises a rear longitudinal beam auxiliary support and a telescopic auxiliary support rod; the rear longitudinal beam The bottom end of the auxiliary support is connected to the slide plate, the top is provided with a fifth connecting plate, the fifth connecting plate is provided with an opening, and the fifth and sixth limiting blocks are provided on both surfaces of the opening; The auxiliary support rod is located between the relative sixth positioning blocks. 10. The bulletproof load-bearing vehicle body floor welding fixture according to claim 4, characterized in that: both the bottom plate and the slide plate are provided with clamping devices for the cowl bulge assembly and the rear wheel house assembly, and the front The clamping device of the bulge assembly and the rear wheel cover assembly includes a base, a sixth connecting plate is arranged on the top of the base, a fifth pressing plate is arranged above the sixth connecting plate, and one end of the fifth pressing plate passes through the first The three pins are connected to the sixth connecting plate, and the fifth pressing plate can rotate around the third pin; the fifth pressing plate is also provided with a third rotating rod, and the third rotating rod passes through the fifth pressing plate , the top is screwed to the sixth connecting plate; a sixth limiting block is also provided between the fifth pressing plate and the base.

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