What are the principles to be followed in the production process of automotive metal stamping and drawing parts?

In recent years, China has attracted much attention because it has gradually become the world’s manufacturing center and a major consumer country. In particular, the rapid development of industries such as automobiles, communication electronics and household appliances has led to a rapid increase in the demand for metal stamping, metal stamping, and other components. Many multinational companies have transferred the manufacturing of complete machines to China, and also transferred supporting factories to China. The purchase of accessories from China has also increased rapidly year by year, driving the rapid development of china related industries. In this context, China’s metal stamping industry, which is one of the basic industries of the manufacturing industry, has also achieved rapid development. At present, the market capacity of the china metal stamping industry is growing rapidly. The number of enterprises is large, the scale is small, the industry concentration is low, the level of informatization and technology is low, the product quality level is low, there are many market participants, and the market competition is sufficient.

Metal stamping refers to the forming and fabrication method of applying external force to materials such as plates and strips by punching machines and metal stamping dies to cause plastic deformation or separation to obtain workpieces of the desired shape and size. According to the process classification, it can be divided into two categories: separation process and forming process. The separation process is also called blanking, and its purpose is to separate the metal stamping parts from the sheet along a certain contour line, while ensuring the quality requirements of the separation section. The purpose of the forming process is to plastically deform the sheet without breaking the blank to make a workpiece of the desired shape and size. Blanking, bending, shearing, deep drawing, bulging, spinning, and straightening are several main metal stamping processes. In actual production, multiple processes are often integrated into a workpiece.

The metal automobile stamping parts industry is an important sub-industry in the metal forming and fabrication industry, and it is the basic industry of the machinery manufacturing industry. Its development level reflects the competitiveness of a country’s manufacturing process technology. The production and manufacture of automobile body, chassis, fuel tank, radiator sheet, boiler drum, container shell, motor, electrical iron core silicon steel sheet, instrumentation, household appliances, bicycles, office machinery, living utensils, etc. A large number of metal stamping parts are required, involving aerospace industry, automobile manufacturing, electronic and electrical industry, instrumentation industry, equipment manufacturing industry and many other aspects, and the application range is very wide.

The production of metal stamping and drawing parts must comply with some design principles when designing:

• 1. When designing, the designed stamping product must meet the original technical performance of its use, and it must be easy to assemble.
• 2. The designed stamping and drawing parts must be able to improve the utilization rate of metal materials, reduce the consumption and waste of materials, and try to achieve no waste generation.
• 3. The designed stamping and drawing parts should have a simple shape and a relatively reasonable structure, which can help simplify the structure of the metal stamping die and improve the production efficiency.
• 4. When the designed stamping and drawing parts can be used normally, the dimensional accuracy should be reduced, which can reduce the generation of waste products and ensure the quality of the products is stable.
• 5. The designed stamping and drawing parts should be convenient for the metal stamping die to process it, and it should be beneficial to prolong the service life of the metal stamping die.