Analysis of the Process and Function of Electroplating on the Surface of Automotive Stamping Parts

2019-05-31 14:21:47

Causes of Die Loss in Stamping

The material selection of the main working parts of the die is inappropriate. Material performance is not good, wear-resistant; die steel is not refined, with a large number of smelting defects; convex and concave die, forging process is not perfect, there are hidden dangers of heat treatment.

The design of die structure is unreasonable. The slender punch has not designed reinforcing device, the discharge outlet is not smooth, and the unloading force is too strong to make the punch bear the increasing alternating load and so on.

 The imperfection of die-making process is mainly manifested in the poor quality of forged blanks of convex and concave dies, the problems of heat treatment technology and process, resulting in the hardenability of convex and concave dies, and the uneven softness and hardness. Sometimes micro-cracks, even cracks, lapping and polishing are not in place, and the surface roughness value is too large.

 No lubrication or lubrication, but the effect is not good.

The surface treatment processes of automobile stamping parts are: gold plating, silver plating, nickel plating and zinc plating.

Gold plating: Gold plating on workpiece surface treatment is not only beautiful, but also not easy to oxidize, but also has high cost.

Silver plating: Surface treatment with a layer of silver, contact resistance is less, while conductivity is better, and not easy to oxidize.

Nickel plating: Nickel plating is a common method for surface treatment of automotive stamping parts. Its function is to facilitate the welding of products, not easy to oxidize, and good conductivity.

Galvanizing: beautiful, rust-proof, improve its protective and decorative functions.

Surface treatment plays an important role in the production of automotive stamping parts: oxidation resistance, easier conductivity, rust prevention, decoration and improving product performance.