Since its invention in Europe in 1920s, fine blanking technology has experienced more than 80 years. It is one of the most important precision plastic forming methods in the field of thick plate manufacturing. It is a method with high technical content and good economic benefits for the economic production of large quantities, high quality, multi-functional ferrous and non-ferrous metal parts. Fine blanking press completes a stamping process, through the processing of special fine blanking die, one or more high precision forming parts can be produced, which can be directly used for assembly. It has been widely used in the fields of electronics, computer, electric power, home appliances, automobile and aviation. According to incomplete statistics, there are about 4500 fine blanking machines and 10000 parts produced in 40 countries in the world. For example, there are nearly 100 kinds of fine blanking parts in a car (car), including gearbox fork, seat and seat belt angle adjuster, planetary gear, brake shoe and steel back.
China’s fine blanking die technology has made great progress in the Eleventh Five Year Plan period, and has made a series of scientific research achievements in fine blanking process, materials, fine blanking press, die base, die and lubrication. As of the end of 2008, nearly 20 provinces and cities in China have professional fine blanking production equipment, with more than 80 fine blanking presses (excluding hydraulic mold base), more than 5000 fine blanking employees, producing about 2000 kinds of fine blanking parts, and a number of independent fine blanking mold development demonstration bases have been formed. Metal materials are expanded from non-ferrous metal blanking to ferrous metal blanking. The blanking thickness of low carbon steel, low alloy steel and stainless steel can reach 12mm; the blanking thickness of non-ferrous metals such as aluminum alloy and copper alloy can reach 18mm; with the progress of die materials and treatment methods, as well as the spheroidization process of the punched plate Some hard high carbon steel, high alloy steel and other low toughness materials such as nickel base or cobalt base alloy materials are also used in the production of fine blanking parts. In addition, the proportion of self-developed progressive compound fine blanking die, transfer die and modular die in domestic fine blanking die has increased significantly, especially the progressive compound fine blanking die for complex parts of automobile transmission system has basically realized localization.
The research, development and application of finite element numerical simulation technology, structure optimization technology of fine blanking die, intelligent design and knowledge base technology of fine blanking die improve and enrich the technical connotation of fine blanking die in China. However, at present, the fine blanking enterprises are generally small in scale, scattered in resources, low in production efficiency, shortage of talents and incomplete in supporting. Although in the fine blanking die development has a certain development ability.
About the author