Front floor front cross member assembly pneumatic welding device

Abstract

A pneumatic welding device for a front floor and front crossbeam assembly includes two first clamps, two second clamps, and two third clamps arranged side-by-side on a base. The first clamps have two first lower clamps on the upper surface of their first upright plates, with a first pressure rod hinged to the other end. Two first upper clamps are correspondingly located at the ends of the first pressure rods. The second clamps have two second lower clamps arranged side-by-side on the upper surface of their second upright plates, with a second pressure rod hinged to the other end. Two second upper clamps are correspondingly located at the ends of the second pressure rods. The third clamps have a third lower clamp in the middle of the upper surface of their third upright plates, a third pressure rod hinged to the outer edge of the third upright plate, and a third upper clamp in the middle of the third pressure rod. While each component of the welding device is clamped and fixed by its corresponding clamps, a positioning pin can be inserted into a positioning hole on the workpiece, assisting the clamping mechanism in positioning and reinforcing the workpiece. This prevents welding accuracy from being affected by workpiece positional deviations and ensures welding stability.

Description

Technical Field

[0001] This utility model relates to the field of automotive welding fixtures, and in particular to a pneumatic welding device for the front floor and front crossbeam assembly. Background Technology

[0002] The front crossbeam assembly of the automotive front floor is a core load-bearing and connecting component of the front of the vehicle body. It is mainly composed of the front crossbeam body, the front section of the front floor, reinforcing plates, and related connecting parts, integrated through welding. Located under the front of the vehicle body, it connects to the front longitudinal beam at the front end and transitions to the middle and rear sections of the front floor at the rear end. It is not only a key node for load transfer at the front of the vehicle, distributing impacts and braking loads from the road surface to other load-bearing structures of the vehicle body, but also provides a mounting support base for the powertrain components such as the engine and transmission, as well as the steering system. Simultaneously, through a reasonable cross-sectional design and reinforcing plate arrangement, this assembly improves the torsional stiffness and collision safety of the front of the vehicle body. See the automotive front floor front crossbeam assembly disclosed in application number CN202321101940.0 for details.

[0003] Currently, the front crossbeam assembly of the automotive front floor typically uses welding equipment to clamp and fix the various components in a precise spatial position. The clamping mechanism then secures the components, preventing dimensional deviations caused by thermal deformation during welding. This clamping method places high demands on the clamping accuracy and stability of the clamping mechanism. Wear and tolerances resulting from high-frequency clamping and welding can easily lead to positional deviations in the components, affecting welding accuracy and causing a decrease in welding stability, requiring frequent inspection and maintenance. Utility Model Content

[0004] To address the aforementioned issues, this invention proposes a pneumatic welding device for the front floor and front crossbeam assembly.

[0005] The technical solution of this utility model is: a pneumatic welding device for a front floor and front crossbeam assembly, comprising two first clamps arranged side-by-side on one side of a base, two second clamps arranged side-by-side on the other side of the base, and a third clamp arranged side-by-side on one side of the two second clamps; the base is a square base with four support legs at its four corners; one end of the upper surface of the first upright plate of the first clamp has two first lower clamps arranged side-by-side, with a certain gap between the two first lower clamps to accommodate the width of the workpiece; the other end is hinged to a first pressure rod, and the end of the first pressure rod has two corresponding first upper clamps; the first pressure rod has multiple mounting holes arranged side-by-side to adjust the position of the first upper clamps; the second clamps... The second vertical plate has two lower chucks arranged side-by-side at one end of its upper surface, and a second pressure rod hinged to the other end. Two upper chucks are correspondingly located at the ends of the second pressure rods. A certain gap exists between the two lower chucks to accommodate the width of the workpiece. Multiple mounting holes are arranged side-by-side on the second pressure rods to allow adjustment of the position of the upper chucks. The third vertical plate of the third fixture has a lower chuck located in the groove in the middle of its upper surface. A third pressure rod is hinged to the outer edge of the third vertical plate. A third upper chuck is correspondingly located in the middle of the third pressure rod. A certain gap exists between the two lower chucks to accommodate the width of the workpiece. Multiple mounting holes are arranged side-by-side on the third pressure rod to allow adjustment of the position of the upper chucks.

[0006] Preferably, the third lower clamp of the third clamp is provided with a third upper positioning pin through the upper body.

[0007] Preferably, the inner edge of the third upright plate is provided with a third lower positioning pin via the lower base body.

[0008] Preferably, the inner end of the third pressure rod is provided with an extension rod, the extension rod and the main body of the third pressure rod are connected by a right-angle bend structure, the outer end of the extension rod is provided with an auxiliary upper pressure head, and the third vertical plate below the auxiliary upper pressure head is provided with an auxiliary lower pressure head, and the auxiliary upper pressure head and the auxiliary lower pressure head are arranged alternately.

[0009] Preferably, the upper inner side of the first upright plate is provided with three L-shaped support members connected end to end, and each L-shaped support member is fixedly connected to the other by screws. A first positioning pin is provided on the uppermost L-shaped support member, and the first positioning pin is arranged vertically.

[0010] Preferably, the upper inner side of the second upright plate is provided with a fixing seat, which includes a block support and an L-shaped bracket. A second positioning pin is provided on the fixing seat, and the second positioning pin is arranged vertically.

[0011] Preferably, the outer ends of the first clamp, the second clamp, and the third clamp are all equipped with cylinders, and the lower outer corner of the upright plate is equipped with a hinge seat. The lower end of the cylinder is hinged to the hinge seat, and the outer end of the piston rod of the cylinder is hinged to the outer end of the corresponding pressure rod through a U-shaped fork.

[0012] Preferably, the first, second, and third upright plates are all fixedly connected to the base via right-angle brackets. The right-angle brackets are provided with multiple mounting holes arranged vertically side by side to adjust the installation height of the fixture, and a reinforcing rib is provided in the middle of the right-angle brackets.

[0013] The beneficial technical effects of this utility model are as follows: the welding device is provided with a first positioning pin on the upper part of the first clamp, a second positioning pin on the upper part of the second clamp, and a third upper positioning pin and a third lower positioning pin of a combined structure on the upper part of the third clamp. While each component is clamped and fixed by the corresponding clamp, the positioning pin can be inserted into the positioning hole on the workpiece, which plays the role of assisting the clamping mechanism in positioning and reinforcing the workpiece, avoiding the problem of welding accuracy being affected by the position deviation of the workpiece, and ensuring welding stability. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention (in order to clearly show the layout of the welding device, the main structure of the cylinder is omitted, while the piston rod of the cylinder is retained). Figure 2 This is a top view of the structure of this utility model; Figure 3 This is a three-dimensional structural diagram of the first fixture; Figure 4 This is a three-dimensional structural diagram of the second fixture; Figure 5 This is a three-dimensional structural diagram of the third clamp.

[0015] In the figure, 1. First clamp, 11. First upright plate, 12. First lower clamp, 13. First pressure rod, 14. First upper clamp, 15. L-shaped support, 151. First positioning pin, 2. Second clamp, 21. Second upright plate, 22. Second lower clamp, 23. Second pressure rod, 24. Second upper clamp, 25. Fixed seat, 251. Second positioning pin, 3. Third clamp, 31. Third upright plate, 311. Groove, 32. Third lower clamp, 33. Third pressure rod, 331. Extension rod, 34. Third upper clamp, 35. Third upper positioning pin, 36. Third lower positioning pin, 371. Upper seat, 372. Lower seat, 381. Auxiliary upper pressure head, 382. Auxiliary lower pressure head, 4. Piston rod, 41. U-shaped fork, 5. Right angle seat, 51. Reinforcing rib, 6. Guide block, 7. Base. Detailed Implementation

[0016] Example 1, see appendix Figure 1-5A pneumatic welding device for a front floor and front crossbeam assembly includes two first clamps 1 arranged side-by-side on one side of a base 7, two second clamps 2 arranged side-by-side on the other side of the base 7, and a third clamp 3 arranged side-by-side on one side of the two second clamps 2. Two first lower clamps 12 are arranged side-by-side on one end of the upper surface of the first vertical plate 11 of the first clamp 1, and a first pressure rod 13 is hinged to the other end. Two first upper clamps 14 are correspondingly provided at the ends of the first pressure rods. The first pressure rods drive the first upper clamps to fall or rise, thereby achieving contact or separation with the first lower clamps 12, and thus achieving clamping and loosening. Two second clamps 14 are arranged side-by-side on one end of the upper surface of the second vertical plate 21 of the second clamp 2. The lower clamp 22 has a second pressure rod 23 hinged to its other end. The end of the second pressure rod 23 is provided with two second upper clamps 24. The second pressure rod drives the first upper clamps to fall or rise, so as to contact or separate from the second lower clamp 22, thereby achieving clamping and loosening. The third clamp 3 has a third lower clamp 32 in the groove 311 in the middle of the upper surface of the third vertical plate 31. The outer edge of the third vertical plate 31 is hinged with a third pressure rod 33. The middle part of the third pressure rod 33 is provided with a third upper clamp 34. The third pressure rod drives the third upper clamp to fall or rise, so as to contact or separate from the third lower clamp 32, thereby achieving clamping and loosening.

[0017] The hinge joints of the first pressure rod 13, the second pressure rod 23, and the third pressure rod 33 are all equipped with guide blocks 6. The groove 311 structure on the guide block 6 provides guidance and limit for the pressure rod, preventing the pressure rod from deviating or misaligning and ensuring the accuracy of clamping and fixing.

[0018] The upper inner side of the first upright plate 11 is provided with three L-shaped support members 15 connected end to end. The uppermost L-shaped support member 15 is provided with a first positioning pin 151. The first positioning pin 151 is used to match and be inserted into the positioning hole on the corresponding workpiece to provide installation positioning and auxiliary reinforcement for the workpiece.

[0019] The upper inner side of the second upright plate 21 is provided with a fixing seat 25, and a second positioning pin 251 is provided on the fixing seat 25. The second positioning pin is used to match and be inserted into the positioning hole on the corresponding workpiece to provide installation positioning and auxiliary reinforcement for the workpiece.

[0020] The first clamp 1, the second clamp, and the third clamp 3 are all equipped with cylinders at their outer ends. The outer end of the piston rod 4 of the cylinder is hinged to the outer end of the corresponding pressure rod through a U-shaped fork 41. The lower end of the cylinder housing is hinged to the vertical plate. The pressure rod is driven to swing up and down by the cylinder to achieve the clamping and releasing action.

[0021] When using this welding device, all three clamps—first clamp 1, second clamp 2, and third clamp 3—are opened. The first workpiece is then placed between the upper and lower jaws of the first clamp 1, clamping and fixing it in place. The second workpiece is placed between the upper and lower jaws of the second clamp 2, clamping and fixing it in place. Similarly, the third workpiece is placed between the upper and lower jaws of the third clamp 3, clamping and fixing it in place. Simultaneously, the first positioning pin 151 on the upper part of the first clamp 1, the second positioning pin 251 on the upper part of the second clamp 2, and the combined upper positioning pin 35 and lower positioning pin 36 on the upper part of the third clamp 3—a combination structure—ensure that each component is clamped and fixed by its corresponding clamp. At the same time, the positioning pins can be inserted into the positioning holes on the workpiece, assisting the clamping mechanism in positioning and reinforcing the workpiece. This prevents welding accuracy from being affected by workpiece positional deviations, ensuring welding stability.

[0022] The first upright plate 11, the second upright plate 21 and the third upright plate 31 are all fixedly connected to the base 7 through the right-angle seat 5, and a reinforcing rib 51 is provided in the middle of the right-angle seat 5 to provide stable support for each clamp.

[0023] Example 2, see appendix Figure 5 This embodiment is basically the same as Embodiment 1, and the similarities will not be repeated. The differences are as follows: the third lower chuck 32 of the third clamp 3 is provided with a third upper positioning pin 35 through the upper seat 371. The third upper positioning pin is inserted into the positioning hole of the workpiece from the top. The positioning pin is an irregularly shaped pin, which makes it more stable when inserted into the positioning hole. The inner edge of the third vertical plate 31 is provided with a third lower positioning pin 36 through the lower seat 372. The third lower positioning pin 36 is inserted into the positioning hole of the workpiece from the bottom. The inner end of the third pressure rod 33 is provided with an extension rod 331, and the outer end of the extension rod is provided with an auxiliary upper pressure head. The main body of the extension rod 331 and the third pressure rod 33 is a bent structure. The third vertical plate 31 below the auxiliary upper pressure head 381 is provided with an auxiliary lower pressure head 382.

[0024] In this embodiment, the third clamp 3, by setting an extension rod 331 with a bent structure, forms an auxiliary upper pressure head 381 and an auxiliary lower pressure head 382 on one side of the third lower clamp 32 and the third upper clamp 34 on the clamp body. The combination of the two sets of pressure heads forms two-point positioning and increases the clamping contact area of ​​the workpiece. Furthermore, an upper positioning pin is set that is inserted into the positioning hole of the workpiece from the top, and a lower positioning pin is inserted into the positioning hole of the workpiece from the bottom, forming an upper and lower combined positioning pin structure, which improves the positioning effect of the workpiece. Combined with the combined clamp structure, it can ensure that the workpiece is in a stable welding and fixing state for a long time.

Claims

1. A pneumatic welding device for a front floor and front crossbeam assembly, characterized in that: The fixture includes two first clamps arranged side-by-side on one side of the base, two second clamps arranged side-by-side on the other side of the base, and a third clamp arranged side-by-side on one side of the two second clamps. The first clamp has two first lower clamps arranged side-by-side at one end of the upper surface of its first upright plate, and a first pressure rod hinged to the other end. Two first upper clamps are correspondingly provided at the ends of the first pressure rods. The second clamp has two second lower clamps arranged side-by-side at one end of the upper surface of its second upright plate, and a second pressure rod hinged to the other end. Two second upper clamps are correspondingly provided at the ends of the second pressure rods. The third clamp has a third lower clamp in the groove in the middle of the upper surface of its third upright plate, a third pressure rod hinged to the outer edge of the third upright plate, and a third upper clamp correspondingly provided at the middle of the third pressure rod.

2. The pneumatic welding device for the front floor and front crossbeam assembly according to claim 1, characterized in that: The third lower clamp of the third clamp is provided with a third upper positioning pin through the upper body.

3. The pneumatic welding device for the front floor and front crossbeam assembly according to claim 2, characterized in that: The inner edge of the third upright plate is provided with a third lower positioning pin via the lower base.

4. The pneumatic welding device for the front floor and front crossbeam assembly according to claim 3, characterized in that: The inner end of the third pressure rod is provided with an extension rod, the outer end of the extension rod is provided with an auxiliary upper pressure head, and the third vertical plate below the auxiliary upper pressure head is provided with an auxiliary lower pressure head.

5. The pneumatic welding device for the front floor and front crossbeam assembly according to claim 1, characterized in that: The upper inner side of the first upright plate is provided with three L-shaped support members connected end to end, and the uppermost L-shaped support member is provided with a first positioning pin.

6. The pneumatic welding device for the front floor and front crossbeam assembly according to claim 1, characterized in that: The upper inner side of the second upright plate is provided with a fixing seat, and a second positioning pin is provided on the fixing seat.

7. The pneumatic welding device for the front floor and front crossbeam assembly according to claim 1, characterized in that: The first, second, and third clamps are all equipped with cylinders at their outer ends, and the outer ends of the piston rods of the cylinders are hinged to the outer ends of the corresponding pressure rods via U-shaped forks.

8. The pneumatic welding device for the front floor and front crossbeam assembly according to claim 1, characterized in that: The first, second, and third upright plates are all fixedly connected to the base via right-angle brackets, and a reinforcing rib is provided in the middle of the right-angle brackets.

Images