Abstract
Is the main purpose of the car body by passenger, cargo, safely and reliably protect passengers and cargo from wind, sand, rain, snow, etc., constitute a good air mechanics environment, body should guarantee reasonable structure, beautiful shape, color coordination, and can effectively reduce the car’s fuel consumption, air resistance and ensure the car driving stability and cooling condition of the engine, ensure the car ventilation, etc. The body parts mainly include body shell, surface meal gold, freight car and cab, door, window, frame and so on. The automobile body structure can be divided into three types: non-bearing, semi-bearing and bearing. There are many kinds of welding methods commonly used in body maintenance, and it is of great significance to research and formulate the welding repair process for body.
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