CN102248346A - Clamp for longitudinal beam of rear floor slab of automobile - Google Patents

Abstract

The invention discloses a fixture for rear floor longitudinal beams of automobiles, which comprises a support foot and a support platform fixed on the support foot. The support platform is provided with a sliding clamping device for fixing the parts to be welded on the rear floor longitudinal Floor longitudinal beams and several positioning clamping devices for fixing parts to be welded on the rear floor longitudinal beams; The clamping arm matched with the rotation of the plate, the first angle seat of at least one of the positioning clamping devices is provided with a first positioning pin matching the mounting hole on the rear floor longitudinal beam; the sliding clamping device includes a second angle seat, The second form plate fixedly connected with the second corner seat is provided with a second positioning pin matching with the mounting holes of the parts to be welded on the rear floor longitudinal beam. Through this fixture, the clamping welding of the longitudinal beam of the rear floor of the automobile can be realized, which effectively solves the positioning welding of the longitudinal beam of the rear floor of the automobile, and ensures the consistency after welding.

Description

An automobile rear floor longitudinal beam clamp

technical field

The invention relates to a clamp, in particular to a clamp for rear floor longitudinal beams of an automobile.

Background technique

In the car body structure, the underbody assembly is composed of three parts, the front cabin, the front floor and the rear floor, and there are longitudinal beams on the left and right sides under these three parts. The longitudinal beams of the three parts are organically combined and welded. As a result, it carries the main weight of the vehicle. Among them, the front cabin longitudinal beam is equipped with the front axle and front shock absorber, and the rear axle and rear shock absorber are respectively installed on the left and right side longitudinal beams of the rear floor. More specifically, the rear swing arm support assembly, the rear floor longitudinal beam reinforcement plate assembly, the rear shock absorber seat, the rear muffler installation hook assembly and the rear section of the rear floor longitudinal beam are welded on the rear floor longitudinal beam. The rear axle is assembled on the rear swing arm bracket assembly, and the rear axle is a whole composed of rear shock absorber, rear hub, rear hub brake, rear spring steel, etc.

The four-wheel alignment of the car is 100% tested before leaving the factory. If it is unqualified, it must not be released from the factory, because the four-wheel alignment affects the unilateral wear of the front and rear tires; the steering wheel is too heavy or floats and shakes when driving; There are potential safety hazards such as left or right deviation, so whether the four-wheel alignment is qualified is particularly important. Since the rear shock absorber, rear tire and rear axle are connected as one, whether the rear axle is installed in place will directly affect the four-wheel alignment of the car.

At present, the jig used on site uses the commonly used flip positioning to locate the installation hole of the rear axle. Although this positioning mechanism is simple and easy to operate, many welding jigs use this structure, but because it is a flip mechanism, the movement track is a section. Arc, so when the positioning pin is in contact with the positioning hole (that is, the mounting hole of the rear axle), there is always a deviation, that is, when positioning, the positioning pin and the positioning hole are vertical, and when the positioning pin is opened, there will be a gap between the positioning pin and the positioning hole. The holes interfere slightly, which makes it difficult to guarantee the consistency of the mounting holes after welding. For example, the Chinese utility model patent CN 201208689Y, dated March 18, 2009, discloses a welding fixture for the rear axle of an automobile. The fixture includes a support frame and a support body for fixing the rear axle. The support body is a frame structure, the support body is movably connected to the support frame, and the front and back sides of the support body can be exchanged on the support frame by turning over. There will be interference between the positioning pin and the positioning hole in this clamp.

To sum up, the installation holes of the assembled rear axle (on the rear swing arm support assembly) must be consistent during the body welding process. And to position and weld the above-mentioned parts to be welded on the rear floor longitudinal beam of the automobile to the rear floor longitudinal beam, it is also necessary to use reasonable fixtures to accurately position them. Therefore, whether the fixture positioning is reasonable or not will directly affect the welding performance. consistency.

Contents of the invention

The invention provides an automobile rear floor longitudinal beam clamp, which effectively solves the positioning welding of the automobile rear floor longitudinal beam and ensures the consistency after welding.

A fixture for rear floor longitudinal beams of an automobile, comprising support feet and a support platform fixed on the support feet, the support platform is provided with a sliding clamping device for fixing parts to be welded on the rear floor longitudinal beams and a fixed rear floor longitudinal beam. Beams and several positioning and clamping devices for fixing parts to be welded on the rear floor longitudinal beams; the positioning and clamping devices include a first corner seat, a first type plate fixedly connected with the first corner seat and a first type plate The clamping arm that is rotatably matched with the plate, and the first corner seat of at least one of the positioning clamping devices is also provided with a first positioning pin that matches the mounting hole on the rear floor longitudinal beam; the sliding clamping The device includes a second corner seat and a second mold plate fixedly connected with the second corner seat. The second mold plate is provided with a second positioning pin matched with the installation hole of the component to be welded on the rear floor longitudinal beam.

There are multiple positioning clamping devices on the entire fixture to ensure the accuracy of positioning welding; at the same time, the positioning pins on the sliding clamping device fix the rear swing arm bracket assembly to be welded on the rear floor longitudinal beam to ensure accurate positioning. The interference phenomenon that occurs when the existing mechanism opens the positioning pin is eliminated, and the consistency after welding is guaranteed.

The support platform is also provided with a positioning device for fixing the parts to be welded on the rear floor longitudinal beam, which is convenient for welding.

The positioning device includes a corner seat and a positioning pin arranged on the corner seat. The positioning pin is used to limit the rear shock absorber seat to be welded on the rear floor longitudinal beam.

Adjustment bolts are also provided under the support platform for convenient adjustment, so that the staff can operate more comfortably.

The positioning and clamping device is provided with a drive cylinder for driving the clamp arm to rotate, and the cylinder is used to drive the clamp arm to rotate, so as to facilitate clamping and loosening.

The sliding clamping device includes a guide rail fixed on the support platform and two sliding positioning mechanisms opposite to each other on the guide rail. The sliding positioning mechanism includes a second corner seat fixedly connected to the second corner seat The second mold plate and the second positioning pin fixedly connected with the second mold plate, one of the mold plates of the sliding positioning mechanism is also provided with a clamping block. The sliding positioning mechanism slides back and forth on the guide rail, and the position of the sliding positioning mechanism can be adjusted according to the shape and size of the rear swing arm bracket assembly to be welded on the rear floor longitudinal beam, and the positioning pin is inserted into the rear swing arm bracket assembly The positioning hole is used to limit the rear swing arm bracket assembly, which not only facilitates the fixing of the rear swing arm bracket assembly, but also enables the rear swing arm bracket assembly to realize linear movement and positioning, and the welding consistency is guaranteed.

The sliding clamping device also includes a positioning block for placing the rear swing arm support assembly to be welded on the rear floor longitudinal beam. The positioning block can give a positioning point for the rear swing arm bracket assembly to be welded to the rear floor rail to support the rear swing arm bracket assembly.

The sliding clamping device is provided with a driving cylinder for driving the sliding positioning mechanism to move, and the cylinder is used to drive the clamping arm to rotate, so as to facilitate clamping and loosening.

In one mode of the present invention, there are four positioning and clamping devices, including:

a first positioning clamping device, which fixes the rear portion of the rear floor stringer;

a second positioning and clamping device, which fixes one end of the reinforcing plate assembly to be welded on the rear floor stringer;

A third positioning clamping device, which fixes the other end of the reinforcing plate assembly to be welded on the rear floor longitudinal beam;

A fourth positioning and clamping device, which fixes the rear section of the rear floor stringer to be welded on the rear floor stringer.

Such a structure is suitable for the clamp welding of the rear floor longitudinal beam of the hatchback and ensures the consistency of the welding.

In another form of the present invention, there are five positioning and clamping devices, including:

a first positioning clamping device, which fixes the rear portion of the rear floor stringer;

a second positioning and clamping device, which fixes one end of the reinforcing plate assembly to be welded on the rear floor stringer;

A third positioning clamping device, which fixes the other end of the reinforcing plate assembly to be welded on the rear floor longitudinal beam;

a fourth positioning clamping device, which fixes one end of the rear section of the rear floor stringer to be welded on the rear floor stringer;

A fifth positioning clamping device, which fixes the other end of the rear section of the rear floor stringer to be welded on the rear floor stringer.

The fifth positioning and clamping device is used to fix the rear section of the car to be welded on the rear floor longitudinal beam of the sedan, so as to realize the clamping welding of the rear floor longitudinal beam of the sedan.

The fixture of the present invention has the following three main advantages:

1. The present invention realizes the positioning welding of the longitudinal beam of the rear floor of the automobile through the independent setting of the positioning pin and the clamping arm in the positioning clamping device, and ensures the consistency after welding.

2. The present invention adopts a sliding clamping device, uses the positioning pin on the device to locate the position of the rear swing arm bracket assembly, so that the rear swing arm bracket assembly can realize linear movement and positioning, and the welding consistency is guaranteed.

3. There is an adjusting bolt under the support table to adjust the height of the fixture, which can adjust the fixture to the most suitable working position for employees.

4. The welding of the rear floor longitudinal beams of the sedan and the hatchback can be realized at the same time through the jig of the present invention, and the welding of two types of vehicle types can be realized simultaneously by means of the jig, and the applicability is very wide.

In addition, the jig of the present invention is simple to manufacture, low in cost, strong in practicability, easy to learn and understand in operation methods, conducive to standardized operations, convenient for storage and protection, and capable of long-term repeated use. Moreover, the structure is simple, the manufacture is simple and durable, and it is easy to popularize.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of a kind of automotive rear floor longitudinal beam fixture of the present invention;

Fig. 2 is an enlarged view of the first positioning clamping device in the automobile rear floor longitudinal beam clamp shown in Fig. 1;

Fig. 3 is an enlarged view of the sliding clamping device in the automobile rear floor longitudinal beam clamp shown in Fig. 1;

Fig. 4 is an enlarged view of the positioning device in the rear floor longitudinal beam fixture of the automobile shown in Fig. 1;

Fig. 5 is an enlarged view of the second positioning clamping device in the automobile rear floor longitudinal beam clamp shown in Fig. 1;

Fig. 6 is an enlarged view of the third positioning clamping device in the automobile rear floor longitudinal beam clamp shown in Fig. 1;

Fig. 7 is an enlarged view of the fourth positioning clamping device in the automobile rear floor longitudinal beam clamp shown in Fig. 1;

Fig. 8 is an enlarged view of the fifth positioning clamping device in the automobile rear floor longitudinal beam clamp shown in Fig. 1;

Among them: 1. Supporting feet; 2. Supporting platform; 3. The fifth positioning clamping device; 4. The fourth positioning clamping device; 5. The third positioning clamping device; 6. Sliding clamping device; 7. The first Positioning clamping device; 8, second positioning clamping device; 9, positioning device; 10, adjusting bolt; 301, corner seat; 302, bearing seat; 303, positioning pin seat; 304, positioning pin; 305, pattern plate; 306a/306b, supporting block; 307a/307b, clamping block; 308, clamping arm; 309, connecting plate; 310, rotating shaft; 311, piston rod; 312, driving cylinder; 401, angle seat; 402, positioning seat; 403 , support block; 404, driving cylinder; 405, piston rod; 406, rotating shaft; 407, connecting plate; 408a/408b, clamping block; 409a/409b, supporting block; 410, clamp arm; 412, positioning pin seat; 413, type plate; 414, positioning block; 501, corner seat; 502a/502b, drive cylinder; 503, type plate; 504, positioning seat; 505, support block; 506, positioning block; 507b piston rod; 508a/508b, rotating shaft; 509a/509b, connecting plate; 510a/510b/510c, clamping block; 511a/511b, clamping arm; 512, support block; 515, H-shaped limit block; 516, limit block; 601, cylinder foot seat; 602, drive cylinder; 603, bottom plate; 604, angle seat; 605, type plate; 608a/608b, positioning pin; 609a/609b, clamping block; 610, connecting seat; 611, positioning support; 612, template; 613, corner seat; 614, rough positioning block; 615, positioning support; 616, Guide rail; 617, first sliding positioning mechanism; 618, second sliding positioning mechanism; 701, corner seat; 702, driving cylinder; 703, piston rod; 704, rotating shaft 705, connecting plate; 706, clamping arm; 707, clipping Block; 708, support block; 709, type plate; 801, angle seat; 802a/802b, driving cylinder; 803a/803b, positioning pin; 804a/804b, piston rod; 805, rotating shaft; /807b, clamping arm; 808a/808b/808c/808d, clamping block; 809, limit block; 810, H-shaped limit block; 811, pattern plate; 812, support block; 813a/813b, positioning pin seat; 901, angle seat; 902, type plate; 903, seat; 904, positioning pin seat; 905a/905b, positioning pin.

Detailed ways

Referring to Fig. 1 , a kind of automobile rear floor longitudinal beam fixture of the present invention comprises a support foot 1, a support platform 2 supported by four support feet 1, and the support platform 2 is provided with a first positioning and clamping device 7 from left to right, Sliding clamping device 6 , second positioning clamping device 8 , positioning device 9 , third positioning clamping device 5 , fourth positioning clamping device 4 , fifth positioning clamping device 3 . Also be provided with adjusting bolt 10 on support foot 1, it can adjust fixture to the working position that suits most employee.

Referring to FIG. 2, FIG. 2 is the first positioning and clamping device 7 of the rear floor longitudinal beam clamp shown in FIG. The clamping arm 706 rotatably engaged with the template 709, the clamping block 707 used to clamp the rear floor rail of the automobile, and the supporting block 708 matched with the clamping block 707. Coarse positioning blocks 710 and 711 for placing the rear swing arm support assembly to be welded on the rear floor longitudinal beam of the automobile are also provided on the template 709 . The template 709 is provided with a drive cylinder 702 for driving the clamp arm 706 to rotate. When the piston rod 703 of the drive cylinder 702 moves, the clamp arm 706 is driven, and the clamp arm 706 rotates around the rotating shaft 704, so that the clamp arm 706 is relative to the template 709. Opening and closing, the clamping block 707 fixedly connected on the clamping arm 706 cooperates with the support block 708 below to better clamp the tail of the automobile rear floor longitudinal beam clamp. A connecting plate 705 is also provided between the pattern plate 709 and the clamp arm 706 to connect the two and limit the position of the clamp arm.

Referring to Fig. 3, Fig. 3 is the sliding clamping device 6 of the rear floor longitudinal beam clamp shown in Fig. 1, which includes a guide rail 616 fixed on the support platform 2, two bottom plates 603 arranged on the guide rail 616, respectively fixed on the bottom plate The first sliding positioning mechanism 617 and the second sliding positioning mechanism 618 on 603 and the driving cylinder 602 used in conjunction with the first sliding positioning mechanism 617 and the second sliding positioning mechanism 618 . The cylinder body of the driving cylinder 602 is fixed by the cylinder foot 601 , and the piston rod of the cylinder 602 is fixed on the bottom plate 603 .

The first sliding positioning mechanism 617 includes a corner seat 604 fixed on the base plate 603, a template 605 fixedly connected thereto, and a socket 606 fixedly connected to the template 605 for fixing the positioning pin seat 607, and the positioning pin 608a is fixed on the positioning pin seat 607.

The second sliding positioning mechanism 618 includes a corner seat 613 fixed on the base plate 603, a template 612 fixedly connected thereto, and a positioning support 611 fixedly connected to the template 612 for fixing the connection seat 610, and the connection seat 610 is two The ends are fixedly connected to the clamping block 609a. A positioning pin 608b and a clamping block 609b are also provided on the side of the pattern plate 612 facing the first sliding positioning mechanism 617 .

In addition, it can be seen from the figure that a positioning support 615 for fixing the coarse positioning block 614 is also provided between the first sliding positioning mechanism 617 and the second sliding positioning mechanism 618 . When in use, first place the rear swing arm bracket assembly on the coarse positioning block 614, and insert the positioning pins 608a, 608b into the positioning pin holes in the rear swing arm bracket assembly to be welded on the rear floor longitudinal beam. The clamping block 609a and the clamping block 609b are clamped. Then drive the driving cylinder 602 to realize the clamping and fixing of the rear swing arm bracket assembly and the rear floor longitudinal beam.

Referring to Fig. 4, Fig. 4 is the second positioning and clamping device 8 of the rear floor longitudinal beam clamp shown in Fig. 1, which includes a corner seat 801 fixed on the support platform 2, and a template 811 fixedly connected above the corner seat 801, The clamping arm 807a and the clamping arm 807b which are rotatably matched with the template 811, the clamping blocks 808a, 808b, 808c, 808d arranged below the clamping arms 807a, 807b for clamping the longitudinal beam of the rear floor of the automobile and the clamping block 808a Cooperating support block 812. The jaws between the clamping blocks 808a, 808b, 808c, 808d and the template 811 fix the car rear floor longitudinal beam and one end of the reinforcing plate assembly to be welded on the rear floor longitudinal beam. Both sides of template 811 are respectively provided with two positioning pin seats 813a, 813b for fixing positioning pins 803a, 803b. It is positioned by the positioning pin 411a in the fourth positioning clamping device 4; the positioning pin 803b is inserted into the positioning hole at one end of the reinforcement plate assembly to be welded on the rear floor longitudinal beam to determine the position of the reinforcement plate assembly. The template 811 is provided with driving cylinders 802a and 802b for driving the rotation of the clamping arms 807a and 807b. When the piston rods 804a and 804b of the driving cylinders 802a and 802b move, they respectively drive the clamping arms 807a and 807b, and the clamping arms 807a and 807b revolve around the rotating shaft respectively. 805a and 805b rotate, so that the opening and closing of clamping arms 807a and 807b relative to template 811 is realized. The template 811 is also provided with a limit block 809, and the limit block 809 is provided with an H-shaped limit block 809 matched with it, which is used to limit the position of the clamp arm 807a. The shapes of the limiting block 809 and the H-shaped limiting block 810 can be changed according to actual conditions, and are not limited to the shapes shown in the figure. Connecting plates 806a and 806b are respectively provided between the pattern plate 811 and the clip arms 807a and 807b to connect the two and limit the positions of the clip arms 807a and 807b.

Referring to Fig. 5, Fig. 5 is the positioning device 9 of the rear floor longitudinal beam clamp shown in Fig. 1, which includes a corner seat 901 fixed on the support platform 2, a mold plate 902 fixed above the corner seat 901, and a mold plate fixed on the mold plate The seat 903 above 902 is used to fix the positioning pin seat 904, and the positioning pin seat 904 is provided with two positioning pins 905a and 905b. The two positioning pins 905a and 905b are used to position the rear shock absorber seat to be welded on the rear floor rail of the automobile.

Referring to FIG. 6, FIG. 6 is the third positioning and clamping device 5 of the rear floor longitudinal beam clamp shown in FIG. The clamping arms 511a that rotate with the template 503 respectively cooperate with the clamping arms 511b, the clamping blocks 510a, 510b, 510c arranged below the clamping arms 511a, 511b for clamping the longitudinal beam of the rear floor of the automobile, and the clamping blocks 510a The support block 512. The jaws between the clamping blocks 510a, 510b, 510c and the template 503 fix the rear floor longitudinal beam of the automobile and the other end of the reinforcing plate assembly to be welded on the rear floor longitudinal beam.

A positioning pin seat 514 for fixing the positioning pin 513 and a positioning seat 504 are respectively provided on two sides of the template 503 . The positioning pin 513 is inserted into the positioning hole at the other end of the reinforcement plate assembly to be welded on the rear floor longitudinal beam, and the positioning pin 803b in the second positioning device 8 jointly determines the position of the reinforcement plate assembly. The positioning seat 504 is provided with two positioning blocks 506, and two supporting blocks 505 are installed at the two ends of the positioning seat 504. The two positioning blocks 506 and the two supporting blocks 505 are used for positioning to be welded on the longitudinal beam of the rear floor of the automobile. The tail silencer mount hook assembly. The template 503 is provided with driving cylinders 502a and 502b for driving the rotation of the clamping arms 511a and 511b. When the piston rods 507a and 507b of the driving cylinders 502a and 502b move, they drive the clamping arms 511a and 511b respectively, so that the clamping arms 511a and 511b respectively rotate The rotating shafts 508a and 508b rotate, so that the opening and closing of the clamping arms 511a and 511b relative to the template 503 is realized.

The template 503 is also provided with a limiting block 516, and the limiting block 516 is provided with an H-shaped limiting block 515 matched with it, which is used to limit the position of the clip arm 511b. The shapes of the limiting block 516 and the H-shaped limiting block 515 can be changed according to actual conditions, and are not limited to the shapes shown in the figure. Connecting plates 509a and 509b are respectively provided between the template 503 and the clamping arms 511a and 511b to connect the two and limit the positions of the clamping arms 511a and 511b.

Referring to FIG. 7, FIG. 7 is the fourth positioning and clamping device 4 of the rear floor longitudinal beam clamp shown in FIG. The clamping arm 410 that rotates with the template 413, the clamping blocks 408a, 408b arranged under the clamping arm 410 for clamping the longitudinal beam of the rear floor of the automobile, and the supporting blocks 409a, 409b respectively matched with the clamping blocks 408a, 408b .

The template 413 is provided with a drive cylinder 404 for driving the clamp arm 410 to rotate. When the piston rod 405 of the drive cylinder 404 moves, the clamp arm 410 is driven to rotate the clamp arm 410 around the rotating shaft 406, so that the clamp arm 410 is opposite to the template 413. The clamping blocks 408a, 408b fixedly connected on the clamp arm 410 cooperate with the supporting blocks 409a, 409b below them respectively, so as to better clamp the rear section of the rear floor longitudinal beam of the automobile. A connecting plate 407 is also provided between the template 413 and the clip arm 410 to connect the two and limit the position of the clip arm 410 .

Both sides of the template 413 are also provided with positioning pin seats for respectively fixing the positioning pins 411a, 411b (the positioning pin 411b is fixed on the positioning pin seat 412, and the positioning pin seat for fixing the positioning pin 411a is not shown in the figure). The positioning pin 411a is inserted into the positioning hole on the other end of the rear floor longitudinal beam of the automobile. As mentioned above, the positioning pin 803a is inserted into the positioning hole at one end of the rear floor longitudinal beam, and the positioning hole at the other end is positioned by the positioning pin 411a, thereby by These two points determine the position of the rear floor longitudinal beam; the positioning pin 411b is inserted into the positioning hole of the rear section of the automobile to be welded on the rear floor longitudinal beam of the automobile, and is used to limit the position of the rear section of the automobile. The template 413 is also provided with a positioning seat 402 for placing the rear section of the automobile to be welded on the longitudinal beam of the rear floor of the automobile. The positioning seat 402 is provided with two supporting blocks 403 and a positioning block 414, through which the clamping and fixing of the rear section of the automobile is facilitated.

Through the first positioning clamping device 7, the sliding clamping device 6, the second positioning clamping device 8, the positioning device 9, the third positioning clamping device 5 and the fourth positioning clamping device 4 on the clamp, the hatchback can be realized. Clamp welding of rear floor stringers. But if the automobile is a sedan, then utilize the fourth positioning clamping device 4 to clamp one end of the rear section of the automobile to be welded on the longitudinal beam of the rear floor of the automobile, and utilize the fifth positioning clamping device 3 to clamp the other end of the rear section of the automobile. one end. As shown in Figure 8, Figure 8 is the fifth positioning and clamping device 3 of the rear floor longitudinal beam clamp shown in Figure 1, which includes a corner seat 301 fixed on the support platform 2, and a template fixedly connected to the top of the corner seat 301 305, the clamping arm 308 that rotates with the molded plate 305, the clamping blocks 307a, 307b arranged under the clamping arm 308 for clamping the longitudinal beam of the rear floor of the automobile and the supporting blocks 306a respectively matched with the clamping blocks 307a, 307b , 306b.

The template 305 is provided with a drive cylinder 312 for driving the clamp arm 308 to rotate. When the piston rod 311 of the drive cylinder 312 moves, the clamp arm 308 is driven, and the clamp arm 308 rotates around the rotating shaft 310, so that the clamp arm 308 is relative to the template 305. Opening and closing, the clamping blocks 307a, 307b fixedly connected on the clamp arm 308 cooperate with the supporting blocks 306a, 306b below them respectively, so as to better clamp the rear section of the rear floor longitudinal beam of the sedan. A connecting plate 309 is also provided between the template 305 and the clip arm 308 to connect the two and limit the position of the clip arm 308 .

One side of the template 305 is also provided with a seat 302 for fixing the positioning pin seat 303, and the positioning pin seat 303 is provided with a positioning pin 304, and the positioning pin 304 is inserted into the sedan to be welded on the rear floor longitudinal beam of the automobile. In the positioning hole in the rear section of the stringer, the position of the rear section of the stringer is limited.

In this way, through the first positioning clamping device 7, the sliding clamping device 6, the second positioning clamping device 8, the positioning device 9, the third positioning clamping device 5, the fourth positioning clamping device 4 and the fifth positioning clamping device on the fixture. Clamping device 3 just can realize the clamping welding of the rear floor longitudinal beam of the sedan.

Claims (10)

1. A car rear floor longitudinal beam clamp, comprising a support foot and a support platform fixed on the support foot, it is characterized in that: the described support platform is provided with a sliding part for fixing parts to be welded on the rear floor longitudinal beam The clamping device and several positioning clamping devices for fixing the rear floor longitudinal beam and the parts to be welded on the rear floor longitudinal beam; the positioning clamping device includes a first corner seat, a first corner seat fixedly connected with the first A molded plate and a clamp arm that rotates with the first molded plate. The first corner seat of at least one of the positioning and clamping devices is also provided with a first mounting hole that matches the mounting hole on the rear floor longitudinal beam. Locating pin; the sliding clamping device includes a second corner seat, a second template fixedly connected with the second corner seat, the second template is provided with the installation hole phase of the parts to be welded on the rear floor longitudinal beam mating second alignment pin. 2 . The automobile rear floor longitudinal beam clamp according to claim 1 , wherein a positioning device for fixing the parts to be welded on the rear floor longitudinal beam is also provided on the support table. 3 . 3. The automobile rear floor longitudinal beam clamp according to claim 2, wherein the positioning device comprises a corner seat and a positioning pin arranged on the corner seat. 4. The automobile rear floor longitudinal beam clamp according to claim 1, wherein the sliding clamping device comprises a guide rail fixed on the support platform and two sliding positioning units opposite to each other on the guide rail. mechanism, the sliding positioning mechanism includes a second corner seat, a second mold plate fixedly connected with the second corner seat, and a second positioning pin fixedly connected with the second mold plate, and the mold plate of one of the sliding positioning mechanisms is also provided with There are material blocks. 5 . The automobile rear floor longitudinal beam clamp according to claim 4 , wherein the sliding clamping device further comprises a positioning block for placing components to be welded on the rear floor longitudinal beam. 6 . 6 . The automobile rear floor longitudinal beam clamp according to claim 4 , characterized in that, the sliding clamping device is provided with a driving cylinder for driving the sliding positioning mechanism to move. 7 . 7. The automotive rear floor longitudinal beam clamp according to claim 1, characterized in that there are four positioning and clamping devices, including: a first positioning clamping device, which fixes the rear portion of the rear floor stringer; a second positioning and clamping device, which fixes one end of the reinforcing plate assembly to be welded on the rear floor stringer; A third positioning clamping device, which fixes the other end of the reinforcing plate assembly to be welded on the rear floor longitudinal beam; A fourth positioning and clamping device, which fixes the rear section of the rear floor stringer to be welded on the rear floor stringer. 8. The automotive rear floor longitudinal beam clamp according to claim 1, characterized in that there are five positioning and clamping devices, including: a first positioning clamping device, which fixes the rear portion of the rear floor stringer; a second positioning and clamping device, which fixes one end of the reinforcing plate assembly to be welded on the rear floor stringer; A third positioning clamping device, which fixes the other end of the reinforcing plate assembly to be welded on the rear floor longitudinal beam; a fourth positioning clamping device, which fixes one end of the rear section of the rear floor stringer to be welded on the rear floor stringer; A fifth positioning clamping device, which fixes the other end of the rear section of the rear floor stringer to be welded on the rear floor stringer. 9 . The automobile rear floor longitudinal beam clamp according to claim 1 , wherein a driving cylinder for driving the clamping arm to rotate is provided in the positioning clamping device. 10 . 10 . The automobile rear floor longitudinal beam clamp according to claim 1 , wherein an adjusting bolt is further arranged under the supporting platform. 11 .

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