Built-in main-splicing clamp for car body

Abstract

The invention relates to a built-in main-splicing clamp for a car body, which is characterized by comprising a built-in clamp body and a lower clamp of the car body, wherein the built-in clamp body comprises a clamp body framework, a stretching mechanism and positioning and clamping components of the car body; the positioning component of the car body is fixedly connected to the stretching mechanism; the stretching mechanism is fixedly connected to the clamp body framework and is connected with a lifting mechanism to be hung in the air; and the lower clamp of the car body comprises the positioning and clamping components of the car body and a positioning and clamping mechanism of the built-in clamp body, is positioned on the ground and is matched with the built-in clamp body connected with the lifting mechanism. The built-in main-splicing clamp provided by the invention greatly saves the construction area and has the obvious advantage of good adjacency of welding tongs, thereby being convenient for a man or a robot to weld; the built-in main-splicing clamp has higher splicing-welding and positioning accuracy for a car body assembly and has the advantages of small volume, light self-weight and high repeated positioning accuracy; and the positioning accuracy of the car body can be less than +/- 0.2mm and is higher than the accuracy of a welding clamp of an ordinary car body.

Description

technical field [0001] The invention relates to a built-in main assembly fixture of a car body, belonging to the technical field of car body welding equipment. Background technique [0002] Relevant data show that in 2003 China's auto market launched a total of 36 new models. In recent years, the speed of launching new models of enterprises has been showing an increasing trend. As a domestic private enterprise, Chery announced that it will launch 3 or 4 new models every year. [0003] There are about 123 automobile factories in China, but the body welding of these automobile factories is mostly one welding main line for one model, and the flexible body welding production line is not too common. Take FAW-Volkswagen as an example for a brief explanation: [0004] [0005] The domestic auto industry urgently needs the production of flexible car body welding production lines. Its characteristic is that a car welding line can pass through multiple models at the same time, sa...

AI Technical Summary

Problems solved by technology

The fixture designed according to the previous thinking is not only difficult to achieve flexible production, but also affects the proximity of welding tongs because the positioning and clamping parts of the left / right side wall assembly are located on the left / right outer side of the car body

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