Surface treatment method for single-sided galvanizing of automobile vibration-damping bushing iron pipe

Abstract

The invention provides a surface treatment method for single-side galvanizing of an automobile vibration attenuation bush type iron pipe. The method sequentially includes the steps that shot blasting is performed; phosphating is performed; sealing is performed, wherein a special automobile vibration attenuation bush type iron pipe clamp is adopted for clamping a product, and a styrene type thermoplastic elastomer is adopted for sealing the interior of the product; cleaning is performed; galvanizing is performed; the galvanized product is passivated; the product is washed, and residual liquid is removed; glue spraying and the like are performed; then the product and rubber are vulcanized so that the product can adhere to rubber. By means of the method, the corrosion resistance and adhesion performance of the product can be effectively improved, the adhesion performance and reliability of the product are also improved while machining cost is reduced, and part corrosion, glue failure and the like can be effectively prevented; production efficiency of the product is improved and the percentage of pass of adhesion is increased.

Description

technical field [0001] The invention relates to a surface treatment process for single-sided galvanizing of iron pipes of automobile shock-absorbing bushings, belonging to the technical field of surface treatment of automobile parts. Background technique [0002] With the continuous increase of the number of vehicles, the cost of labor is also rising. In order to have a strong market competitiveness, not only the design cost budget of the vehicle is getting lower and lower, but also under the condition of taking into account the comfort and safety of the vehicle. , Reducing labor costs is one of today's development trends. A good NVH value (namely Noise noise, Vibration vibration and Harshness) has always been the goal to pursue. [0003] The iron pipe flanging products and non-flanging products of automobile vibration damping bushing are as follows: figure 1 , 2 As shown, the existing technological process of galvanizing the surface of automobile vibration damping bushin...

AI Technical Summary

Problems solved by technology

The technical defect of this process is that the surface of the vulcanized product is galvanized. Due to pickling or alkali washing, high temperature, etc. during galvanizing, it will cause leakage to penetrate into the product and damage the bonding of rubber and iron or aluminum parts. The aluminum inner frame will cause the surface to blacken, which will affect the rubber performance, fatigue life and appearance of the product

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