Passenger vehicle body-in-white floor welding positioning system

Abstract

The invention discloses a passenger vehicle body-in-white floor welding positioning system. The system comprises a supporting base, a bracket table and a positioning base, the bracket table is of a plane frame structure, a plurality of fixing holes are formed in the bracket table and are used for fixing the supporting base, a plurality of extending suspension arms are arranged on the side surfaceof the long edge of the bracket table, lifting lugs are arranged at the tail ends of the suspension arms and are used for lifting the bracket table, after a floor assembly is fixed by the bracket table, the floor assembly does not leave the bracket table until repair welding is completed, the bracket table is lifted to the ground vehicle from a welding station through the lifting lugs, the groundvehicle is pushed to move the floor assembly to a repair welding station to complete repair welding, and the floor assembly is still kept positioned through the bracket table in the repair welding process. According to the system, the floor welding station and the repair welding station are combined into a whole, so that the site space utilization rate is greatly increased, and meanwhile, one setof floor repair welding clamp is removed, so that the trial-manufacture cost is lowered.

Description

technical field [0001] The invention relates to the field of trial production of body-in-white, in particular to a body-in-white floor welding positioning system for passenger cars. Background technique [0002] Nowadays, the competition in the automobile market is fierce. Factors such as the launch speed, price, and quality of new models are the key factors restricting the sales of automobile products. During the trial production process of new products, it is necessary to strictly control the trial production quality and trial production costs to facilitate the development of new products. [0003] During the trial production of the new product body-in-white, due to the layout of the fixtures during floor assembly welding, it is impossible to ensure that all welding points are realized on the floor welding fixtures. The unfinished floor assembly is transferred from the floor welding station to the floor repair welding station. Regarding the above-mentioned conventional fl...

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Problems solved by technology

Regarding the above-mentioned conventional floor welding process, there are the following problems: 1. During the process of transferring the floor assembly from the welding station to the repair welding station, because the welding has not been completed, the local connection strength is weak, and the hoisting process will be affected by its own gravity. The impact leads to local deformation, which seriously affects the welding dimensional accuracy of the floor assembly; 2. The repair welding station of the floor assembly needs to be equipped with a special repair welding fixture. Due to the large size of the repair welding fixture, it is generally fixed during the welding process. If multiple models are trial-manufactured at the same time , which greatly reduces the effective utilization of space in the welding workshop; 3. The welding of the floor assembly needs to make two sets of fixtures for welding and repair welding, which leads to an increase in trial production costs, etc.

In addition, in the current trial production process of new product body-in-white of major domestic OEMs, skids or spreaders are generally used to transfer between stations during the welding process of the floor assembly. The skids require preset tracks on the ground, which has high requirements for plant planning. At the same time, the structure of the fixture is complicated, and it is difficult to realize the common use of multiple models; when using the spreader to transfer the welding sub-assembly between stations, because the spreader needs to lift the floor assembly from the fixture, affected by the structure of the fixture, the structure of the spreader must be very special. Simple, it can only fix the floor assembly, and cannot guarantee that the floor assembly will not be deformed during the transfer process

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