A welding device and fixture for multi-vehicle chassis assembly

Abstract

The present invention belongs to the field of automobile industry, and discloses a multi-model chassis assembly welding device and a jig using the welding device. By setting positioning and limiting structures in three directions of vehicle length, width and height and multiple dimensions of angles on the device, it is no longer necessary to replace the jig when switching multiple models on the production line. The device reduces the time of tooling relocation, improves production efficiency, eliminates tooling deformation caused by frequent tooling relocation, and improves product quality; reduces the production preparation cost of new models, and also reduces the labor intensity of workers caused by tooling switching. It can be applied to the chassis assembly welding of various models.

Description

Technical Field

[0001] The invention belongs to the field of automobile industry, and specifically discloses a welding device for chassis assemblies of multiple vehicle models and a jig using the welding device. Background Art

[0002] The length of a load-bearing bus is more than 8.5 meters, and the width and height are relatively large. In particular, the chassis of a load-bearing bus is different from the structure of a large semi-load-bearing highway bus. The welding process of the load-bearing chassis is complicated, and the quality requirements for the installation of chassis accessories are in accordance with the standards of light buses. This requires a high level of welding fixture process design and the use of advanced process technology to manufacture high-quality large load-bearing buses. In order to meet the needs of large buses, the load-bearing chassis is divided into leaf spring suspension and air suspension. With the development of society, large and medium-sized cities have switched from leaf spring suspension to air suspension vehicles that are more comfortable to ride. The installation accuracy of air suspension is higher than that of leaf spring suspension. The chassis has the problem of welding accuracy control during welding, and it is difficult to confirm by manual tape measurement, which seriously affects the performance of the vehicle and causes great impact and loss to the company.

[0003] The currently used positioning and welding device for the air suspension airbag tray of load-bearing buses is a set of welding fixtures for one type of vehicle. There are many welding fixtures and they are difficult to store. Since buses are produced in small batches and with multiple varieties based on orders, and since load-bearing buses are larger than 8.5 meters, the welding base must be large. When the vehicle model is switched, it is inconvenient to switch and transport the fixtures, and it is easy to cause the welding fixtures to deform, affecting the fixture accuracy and thus the quality of the whole vehicle. Secondly, since the welding fixtures must be replaced when switching vehicle models, which affects production efficiency, it generally takes more than 4 hours to switch the welding fixtures, which easily forms an operation bottleneck at this station and affects the operation rhythm of the entire production line. Thirdly, the manufacturing cost of the welding fixtures is high and the production cycle is long. Fourthly, the original welding fixture wheelbase airbag tray welding fixture positioning adopts a split type, which has manual measurement deviations. Summary of the invention

[0004] In order to solve the problems in the background technology, the present invention provides a multi-car chassis assembly welding device and a fixture using the structure, and the specific technical solution is as follows:

[0005] A multi-vehicle chassis assembly welding device comprises a base fixed with a horizontal slide rail, a plurality of moving trolleys mounted on the horizontal slide rail, a plurality of limit pins for limiting the sliding position of the moving trolleys, a front positioning substrate, a front overhang positioning device, an intermediate positioning substrate, a rear overhang horizontal tray positioning device, a rear positioning substrate, and a front airbag positioning structure arranged on the front overhang positioning device; the front positioning substrate, the intermediate positioning substrate, and the rear positioning substrate are all perpendicular to the horizontal slide rail;

[0006] The rear suspension horizontal tray positioning device includes a rear suspension support frame with a horizontal tray fixed on the top, and a plurality of positioning holes are provided on the horizontal tray; the front suspension positioning device includes a support plate perpendicular to the horizontal slide rail and provided with positioning holes including a plurality of horizontal transverse grooves and a plurality of displacement holes, wherein the line connecting the stop of any one of the horizontal transverse grooves and a displacement hole constitutes a supporting positioning line; the front airbag positioning structure includes a support frame with a tray fixed on the top and a support plate perpendicular to the horizontal slide rail and provided with a positioning hole and a plurality of displacement holes, wherein the line connecting one displacement hole and a positioning hole constitutes a supported positioning line; the supporting positioning line is of equal length to the supported positioning line, and the front suspension positioning device and the front airbag positioning structure are fastened by perforated connectors arranged at both ends of the supporting positioning line.

[0007] This design utilizes the gravity of the frame chassis, and realizes the position and inclination angle of the top surface of the front airbag positioning structure through simply set positioning holes and displacement holes, so as to adapt to the front airbag positioning of different models; by sliding the mobile trolley on the track, it can adapt to different vehicle lengths, and by providing multiple groups of positioning holes on the top surface of the rear suspension horizontal tray positioning device, it can adapt to the needs of positioning the rear suspension airbag assembly welding of different models in the vehicle width direction; the device has a simple structure, precise positioning, and is easy to install and disassemble.

[0008] Preferably, the horizontal slide rails are two rails arranged in parallel and welded to a horizontally placed base.

[0009] The double track is more stable in structure, and the symmetrical adjustment of the positioning bolts will make the frame more evenly stressed and less prone to deformation as a whole.

[0010] The present invention also provides a jig, which comprises the above-mentioned multi-vehicle chassis assembly welding device.

[0011] The device reduces the tooling relocation time, improves production efficiency, eliminates tooling deformation caused by frequent tooling relocation, and improves product quality; reduces the production preparation costs of new models, and also reduces the labor intensity of workers due to tooling switching. It can be applied to the chassis assembly welding of various models. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is an overall schematic diagram of a joint welding device for a chassis assembly of multiple vehicle models in an embodiment of the present invention;

[0013] Figure 2 Schematic diagram of the structure of the rear-hung horizontal pallet positioning device in an embodiment of the present invention;

[0014] Figure 3 A three-dimensional diagram of a front airbag positioning structure in an embodiment of the present invention;

[0015] Figure 4is a three-dimensional diagram of a front suspension positioning device in an embodiment of the present invention;

[0016] Figure 5 It is a schematic diagram of the front airbag positioning structure installed on the front suspension positioning device to realize the positioning of three types of vehicles in an embodiment of the present invention;

[0017] In the figure: 1. base; 2. horizontal slide rail; 3. rear positioning base plate; 4. mobile trolley; 5. rear suspension horizontal tray positioning device; 6. middle positioning base plate; 7. limit pin; 8. front suspension positioning device; 9. front airbag positioning structure; 10. front positioning base plate;

[0018] 5-1 rear suspension support frame; 5-2 horizontal tray; 5-2-1, 5-2-2, 5-2-3 positioning holes;

[0019] 8-1, 8-2, 8-3 displacement holes; 8-4 positioning hole;

[0020] 9-1 support plate; 9-2 tray; 9-1-1, 9-1-2, 9-1-3 displacement holes; 9-1-4 positioning hole;

[0021] 9-2-1, 9-2-2, 9-2-3 tray positioning holes. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described below in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on this embodiment, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] As attached Figure 1 As shown, this embodiment is composed of a base 1, a horizontal slide rail 2, a rear positioning substrate 3, a moving trolley 4, a rear suspension horizontal tray positioning device 5, an intermediate positioning substrate 6, a limit pin 7, a front suspension positioning device 8, a front airbag positioning device 9, and a front positioning substrate 10. The front positioning substrate 10, the intermediate positioning substrate 6, and the rear positioning substrate 3 are all connected to the horizontal slide rail 2.

[0024] The base 1 is designed with a rigid structure, and a level adjustment device is installed at the bottom of the base 1;

[0025] The horizontal slide rail 2 is installed on the base 1, and is used for the sliding of multiple mobile carts 4 thereon to realize the positioning of vehicles of different lengths; the front positioning base plate 10, the front overhang positioning device 8, the middle positioning base plate 6, the rear overhang horizontal tray positioning device 5, and the rear positioning base plate 3 are fixed to different mobile carts 4 in sequence, and the limiting pins 7 are used for limiting, so as to meet the needs of the assembly welding of the rear sections of the chassis of different vehicle models;

[0026] The mobile trolley 4 is installed on the horizontal slide rail 2, and is adjusted according to different welding models, driving the rear hanging horizontal tray positioning device 5 to realize the production of different models;

[0027] The rear suspension horizontal tray positioning device 5 is composed of a rear suspension support frame 5-1 and a horizontal tray 5-2, and its top surface includes three positioning holes 5-2-1, 5-2-2, and 5-2-3 to meet the production of three types of vehicles;

[0028] The front suspension positioning device 8 is installed on the mobile trolley 4. The front suspension positioning device 8 is provided with displacement holes 8-1, 8-2, 8-3 adapted to three types of vehicles and a positioning hole 8-4 with three horizontal grooves and one vertical conversion groove;

[0029] The front airbag positioning structure 9 includes a support plate 9-1 and a tray 9-2. The support plate 9-1 can be a base frame structure made of a double-layer plate, on which are arranged displacement holes 9-1-1, 9-1-2, 9-1-3 and a positioning hole 9-1-4 suitable for three types of vehicles. The tray 9-2 is provided with tray positioning holes 9-2-1, 9-2-2, 9-2-3 suitable for three types of vehicles. According to different vehicle models, first select a horizontal slot position of the positioning hole 8-4, combine it with the positioning hole 9-1-4 with bolts, then select the matching positioning holes on the support plate 9-1 and the front suspension positioning device 8, fix them with bolts, and the installation of the front airbag positioning structure 9 is completed.

[0030] The whole vehicle chassis assembly welding device can cope with the positioning of the front section, front overhang section, middle section, rear overhang section and tail section of the chassis of three vehicle models.

[0031] The multi-model chassis assembly welding device is integrally assembled onto a body-in-white chassis welding jig to achieve chassis welding of different models, which constitutes another embodiment of the present specification: a jig using the multi-model chassis assembly welding device.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A welding device for multiple vehicle chassis assemblies, characterized in that The invention comprises a base (1) fixed with a horizontal slide rail (2), a plurality of moving carts (4) mounted on the horizontal slide rail (2), a plurality of limit pins (7) for limiting the sliding position of the moving carts (4), a front positioning substrate (10) fixed on each of the moving carts (4) in sequence from the front to the rear of the vehicle, a front overhang positioning device (8), an intermediate positioning substrate (6), a rear overhang horizontal tray positioning device (5), a rear positioning substrate (3), and a front airbag positioning structure (9) arranged on the front overhang positioning device (8); the front positioning substrate (10), the intermediate positioning substrate (6), and the rear positioning substrate (3) are all perpendicular to the horizontal slide rail (2); The rear suspension horizontal tray positioning device (5) comprises a rear suspension support frame (5-1) with a horizontal tray (5-2) fixed on the top, and a plurality of positioning holes are arranged on the horizontal tray (5-2); the front suspension positioning device (8) comprises a support plate which is perpendicular to the horizontal slide rail (2) and is provided with positioning holes (8-4) including a plurality of horizontal transverse grooves and a plurality of displacement holes, wherein a line connecting the stop of any one of the horizontal transverse grooves and a displacement hole constitutes a supporting positioning line; the front airbag positioning structure (9) comprises a support plate (9-1) with a tray (9-2) fixed on the top and perpendicular to the horizontal slide rail (2) and provided with a positioning hole and a plurality of displacement holes, wherein a line connecting a displacement hole and a positioning hole constitutes a supported positioning line; the supporting positioning line is of equal length to the supported positioning line, and the front suspension positioning device (8) and the front airbag positioning structure (9) are fastened by perforated connectors arranged at both ends of the supporting positioning line.

2. A multi-vehicle chassis assembly welding device as claimed in claim 1, characterized in that: The horizontal slide rails (2) are two rails arranged in parallel and welded on a horizontally placed base (1).

3. A jig, characterized by: A multi-vehicle chassis assembly welding device comprising any one of claims 1-2.

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