Vehicle shock absorber piston rod spraying technology

Abstract

The invention relates to a vehicle shock absorber piston rod spraying technology. The vehicle shock absorber piston rod spraying technology comprises the following steps of: coarse grinding, degreasing, surface roughening, non-spraying surface protection, preheating, spraying and fine grinding. When a piston rod is treated according to the spraying technology provided by the invention, the performances such as the binding force, the coating intensity, the coating thickness, the abrasion resistance, the corrosion resistance and the like of a coating of the piston rod are all superior to those of a durionise layer, and the cost performance of the coating is also superior to that of the durionise layer, so that the technology is a precedence technology used for replacing a durionise technology; and particularly, the technology does not pollute the environment, is beneficial to improvement of the working environment and the health and the safety of an operator. The technology has the advantages that production period is short, production efficiency is high, defective rate is low, the treated vehicle shock absorber piston rod has good rust-proof performance, good abrasion resistance and long service life; moreover, automation operation is easily realized, production efficiency is high and the production cost is lowered.

Description

technical field [0001] The invention belongs to the technical field of automobile shock absorber processing, and relates to a spraying process for piston rods of automobile shock absorbers. Background technique [0002] The piston rod is an important part of the automobile shock absorber, and the annual output is very large. In order to increase the surface hardness of the piston rod, the working surface of the piston rod is usually chrome-plated. The process is: fine grinding→polishing→cleaning and degreasing→ Pickling and activation → washing with water → hard chrome plating. The disadvantages of this hard chrome plating method are: [0003] (1) The thickness of the electroplated chromium layer is too thin, generally 20 microns, and the highest surface hardness can only reach HV0.05︰900-1200. Therefore, the working surface of the piston rod will have ellipticity, taper, and strain during use. , scratches, longitudinal scratches and other forms of wear. Wear and tear is ...

AI Technical Summary

Problems solved by technology

The disadvantages of this hard chrome plating method are:

If the current area of ​​the part is large, the chromium plating tank should also be enlarged. Otherwise, the temperature of the bath solution will rise rapidly during electroplating, so a cooling device must be added to complicate the equipment, and the processing cost of chrome plating is high.

[0005] (3) It is necessary to establish a pickling activation pool and a chrome-plating electrolytic pool. Both the pickling solution and the solvent of the electrolyte contain volatile toxic substances, so there are potential safety hazards and pollution problems such as environmental pollution. Due to the impact of hard chrome plating on the environment Serious pollution, more and more pressure from environmental protection, urgent need for other technologies to replace

Moreover, the whole chrome plating process is not easy to realize automatic operation, the production efficiency is low, and the manufacturing cost is high.