Fine blanking status:
1. Powerful blank holder fine blanking
As we all know, fine blanking technology is an advanced technology developed on the basis of general blanking. Today what we call fine blanking is strong blank holder fine blanking. Its technological principle is: on the three-action press, with the help of a special structure fine blanking die, under the action of strong force, the material produces plastic-shear deformation, so as to obtain high-quality fine blanking parts. Its appearance has fundamentally changed the technological chain of metal material processing. Therefore, fine blanking is not an alternative processing method, but a high quality, high efficiency and high value-added processing technology. (See Figure 2)
PS = blanking force; PR = ring force; PG = back pressure.
1-die; 2-plate; 3-punch; 4-ejector.
2. Rapid expansion of the world fine blanking Market
In the past 25 years, the technology of high-pressure blank holder fine blanking has developed rapidly, mainly in the following aspects:
(1) In about 45 countries around the world, more than 360 companies have adopted fine blanking technology.
(2) Fine blanking machine: about (3600-4000) sets.
(3) Fine blanking parts: about 1000 kinds.
(4) Fine blanking die: 72% adopt continuous fine blanking die.
(5) Fine blanking process: towards compound forming process.
3. Steady Progress of China's Fine Chongqing Market
In 1976, China and FEINTOOL began the exchange of fine blanking technology. For the first time, FEINTOOL provided training materials for fine blanking technology to our country, which initiated the history of introducing fine blanking machine in our country. In the 1990s, fine blanking technology began to be popularized and applied in the automotive industry. In 1994, the United Nations assisted the construction of China's fine blanking technology service center.
Current situation of fine blanking market in China:
The application of fine blanking technology in our country is in the stage of rapid development. According to the National Industrial Technology Policy, this technology is the development direction of high-tech and industrialization supported by the state. Therefore, for a long period of time, fine blanking technology industry can be supported by the state policy. At present, fine blanking technology has gradually expanded from the original watch and camera industry to the machinery manufacturing industry.
Import foreign fine blanking technology:
In 1985 and 1992, our country introduced Feintool's fine blanking software and trained its personnel. They are basically familiar with and master the principle of fine blanking technology, die design and manufacturing, and fine blanking production process.
As shown in Figure 3, the situation of China's fine blanking market is as follows:
(1) Distribution of fine blanking market: China's fine blanking market is 53 Enterprises in 16 provinces and municipalities, excluding other forms of fine blanking specialized factories.
(2) Ownership of fine blanking machine: import: 80 sets, domestic: 10-15 sets (excluding hydraulic die holder).
(3) Fine blanking parts: about 3500-4000 kinds of production.
(4) Fine blanking die: It has already reached the initial level in design and manufacture.