What are the processing technologies and characteristics of automobile sheet metal parts?

2020-04-21 09:00:39

Sheet metal processing is not only a technical work, but also an important technology that sheet metal technicians need to master. Whether sheet metal products are formed depends on this process. The general processes of sheet metal machining are: metal cutting, cutting tools cut off redundant metal layers from metal materials or workpieces, so as to obtain machining methods with certain shape, size accuracy and surface roughness. Grinding, broaching, turning, milling, planing and drilling are to deform metal, punch, cold roll, cold draw, extrude, bend and, of course, corresponding hot working, so that when metal is formed, work hardening can be used to improve the hardness and strength of parts, but the plasticity will be reduced.

When it comes to details, we make oil tanks, ventilating pipes, Tietong, refrigerators, washing machines, cars, computers.. In fact, these belong to sheet metal processing. The simple point of sheet metal processing generalizes that its processes are cutting, edge buckle, bending, bending, welding, sheet metal processing personnel need certain geometric knowledge, sheet metal parts are sheet metal parts, which can be processed by stamping, bending, stretching and other means. Sheet metal is divided into precision sheet metal and ordinary sheet metal. Precision sheet metal is a high-precision sheet metal part, and its processing and manufacturing is precision sheet metal processing. The definition of simple point is a part with constant thickness in the process of machining, which corresponds to casting, forging and machining.

To distinguish the quality of automobile sheet metal parts, we can start from packaging, weight, welding process, painting process and fitting degree when loading. It's very difficult for ordinary car owners to distinguish whether the sheet metal parts are of high quality after delivery. We might as well distinguish from the packaging of the products in advance: generally, the products produced by small factories will not be printed with contact information and address, while the regular manufacturers will have steel seal, qualification and test label on the products in addition to contact information and address, even if the consumers come out in the process of use in the future At present, there can also be a way of safeguarding rights.

Product weight is one of the inspection standards to measure the quality of sheet metal parts. In order to ensure the safety of automobile, the steel plate used in automobile sheet metal parts must reach a certain weight. The weight of the original sheet metal parts and the high-quality subsidiary sheet metal parts should be almost the same, and if the sheet metal parts you buy are one third lighter than the original sheet metal parts, you will undoubtedly buy a small factory product. As for welding process, it is also a method to distinguish whether sheet metal parts come from large factories. The sheet metal parts produced by regular manufacturers will adopt the operation mode of mechanical cutting and welding, and their welding points or cutting edges are smooth and flat, and the rough edges of the cutting hands will not be left.

Many car owners think that the body parts still need to be painted with the same color as the original car, so they will ignore the painting process of the body parts when choosing the body parts, which is irrelevant, but this idea is not correct. In order to prevent oxidation and corrosion, the body parts need to be painted before leaving the factory. Indeed, the painting link after replacing the body parts can not only color them, but also protect and prevent oxidation. However, if it is a small factory body parts, the painting treatment during production has uneven adsorption and foaming, which will affect the effect of post painting In the process of using, it is easy to fall off, lead to corrosion, affect and damage the quality of sheet metal parts.