Phosphating treatment process of skin of body of passenger car

Abstract

The invention relates to a surface pre-treatment process of a skin of a body of a passenger car, and particularly relates to a phosphating treatment process of a skin of a body. The technical scheme of the invention is that the process comprises the following steps: first, rolling unloaded skin to circle by multilayer, wherein a gap is reserved between adjacent two rings; then, sequentially degreasing, water-washing, surface-adjusting, phosphating and water-washing the skin by adopting an immersing mode; and then, leveling the rolled skin to be dried, and spraying an immersed to the surface of the skin. Through the technical scheme, the skin can be immersed into various small liquor pools to realize related process flows of phosphating treatment by rolling the skin of the body which is several meters or more than ten meters long. Under the premise of not increasing the cost, the phosphating quality of the skin is guaranteed as well, and the work efficiency is improved.

Description

technical field [0001] The invention relates to a surface pretreatment process of a pull skin of a passenger car body, in particular to a surface phosphating process of a pull skin. Background technique [0002] In order to obtain a high-quality coating, phosphating treatment must be carried out before the coating of the passenger car ramen. This is mainly because the phosphating film can improve the bonding force between the organic film and the metal and enhance its corrosion resistance. Therefore, the phosphating process can improve the ramon Improve the surface quality of the leather before coating, prevent the coating from falling off, and ensure the appearance quality of the leather. [0003] Because the stretch skin of the passenger car body is elongated, the longest can reach more than ten meters. In the prior art, there are usually the following two methods for the phosphating treatment of the stretch skin of this car body. Degreasing, phosphorus spraying and other...

AI Technical Summary

Problems solved by technology

[0003] Because the stretch skin of the bus body is elongated, the longest can reach more than ten meters. In the prior art, there are usually the following two methods for the phosphating treatment of the stretch skin of this car body. Degreasing, phosphorus spraying and other processes are carried out on the surface of the skin. The quality of the phosphating treatment in this way is poor and the work efficiency is low; The whole vehicle is impregnated with phosphorus in a large pool. After this phosphating treatment, the surface coating quality of the ramon skin is uniform and stable. However, this method requires the construction of a large workshop and multiple large solution pools that can accommodate the bus body, and the cost is very high. High, currently only a few large bus manufacturers in China have the conditions to adopt this method

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