Principles to be followed when selecting materials for auto parts

2020-04-26 15:44:40

The surface of automobile paint repair must be carefully treated before painting. The surface treatment in automobile repair should be treated differently according to the specific situation, generally including cleaning, degreasing and lubricating grease removal, thorough removal of damaged paint film, grinding and derusting as well as post cleaning and other processes.

Regardless of the surface state of the parts to be repaired before the repair construction, in order to ensure the repair quality, after treatment, the surface state of the areas to be repaired must be clean, oil free, rust free, flat and smooth. If the deformation of the damaged part of the car is quite serious, special tools must be used for shaping the metal parts of the car.

The construction method for local repair of body paint surface is as follows:

First, wash the car, wash the panel surface to be repaired and its surroundings with solvent; then polish (to remove dirt and rust spots) with thin sand, and polish all surfaces to be repaired with 360 ~ 400 sandpaper.

After the completion of all grinding construction, the repair surface and its surroundings shall be cleaned again, and the adjacent parts shall be protected with adhesive tape as required; if necessary, the exposed metal surface shall be brushed with two-component metal surface adjusting agent. Then spray primer, puttying and intermediate coating, Polish moderately if necessary; spray sealing primer; spray appropriate finish.

Professional scratch repair first requires a good working environment. A good working environment is to have a professional paint room and computer paint mixing equipment. Secondly, there should be special quick repair materials, which is an important condition to ensure quick repair of scratches.

A large number of cold stamping processes have been used in the production of automotive stamping parts, which are suitable for the needs of large-scale production of A106B seamless pipes of various varieties in the automotive stamping industry. In medium and heavy-duty vehicles, most of the covering parts, such as body outer panel, and some load-bearing and supporting parts, such as frame, carriage and other auto parts are automobile stamping parts. The steel used for cold stamping is mainly steel plate and steel strip, accounting for 72.6% of the total steel consumption of the whole vehicle. The relationship between cold stamping materials and the production of automobile stamping parts is very close. The quality of materials not only determines the performance of products, but also directly affects the process design of automobile stamping parts process, and affects the quality, cost, service life and production organization of products. Therefore, reasonable selection of materials is one of the most important factors An important and complex task.

In the selection of materials, firstly, according to the type and use characteristics of automobile stamping, the metal materials with different mechanical properties are selected to achieve the purpose of not only ensuring product quality, but also saving materials.

Generally, the following principles should be followed when selecting automobile parts materials:

1. The selected materials shall first meet the service performance requirements of auto parts.

2. The selected materials shall have good process performance.

3. The selected materials shall have better economy.