随着交通旅游业的发展,各类客车的生产得到迅速发展,对客车的制造质量要求也越来越高。为了提高客车的制造质量,必须采用各种先进的制造工艺,如较落后的客车车身铆接蒙皮工艺已为较先进的单面点焊和热预应力蒙皮工艺所代替,使客车车身的蒙皮质量有了较明显的提高。所谓预应力蒙皮工艺有以下两种方法:第一种是将蒙皮板的一端用单面点焊的方法将其焊在车身的骨架上,另一端用机械拉紧的方法(如液压拉紧或气压拉紧等)将蒙皮板拉紧,给蒙皮板一个预应力,然后将蒙皮板(?)单面 With the development of transportation tourism, the production of various types of passenger cars has been rapidly developed, and the manufacturing quality requirements of passenger cars are also getting higher and higher. In order to improve the manufacturing quality of passenger cars, various advanced manufacturing techniques must be adopted. For example, the riveted skinning technology of a relatively backward bus body has been replaced by the more advanced single-sided spot welding and thermal pre-stress skinning technology, Leather quality has been significantly improved. The so-called prestressed skin process has the following two methods: The first is the one end of the skin with a single spot welding method welded to the body frame, the other end of the mechanical tensioning method (such as hydraulic pull Tight or air tight, etc.) Tension the skin to give the skin a prestress, then attach the skin (?) To one side