Blank manufacturing tends to be near net shape. The traditional machining blanks have a large machining allowance, and the machining process takes a long time. The consumption of electric energy, cutting fluid and oil is large, and the environmental pollution is also serious.
With the application and promotion of new technologies, the blank manufacturing process is developing in the direction of precision forming, that is, the Near Net Shape Forming process. After the blank size and shape are formed, there is no margin or even Net Shape Forming. That is to say, there is no margin in the blank, and it can be assembled and used only after grinding.
The basis of the near net forming technology is the development and use of new energy, new materials, comprehensive utilization of mechatronics technology, automation control technology, computer technology, numerical analysis and simulation technology and other fields of high technology, the traditional rough rough forming technology into A cost-effective forming technology with high precision, light weight and low cost.
This technology is a comprehensive integration of new materials, new processes, new equipment and new technologies, including near-net shape casting, precision plastic forming, precision heat treatment modification, surface modification, high-precision molds and other professional fields. For example, the current cold forging precision forming technology in Germany can make the forgings have a radial precision of 0.02 mm, leaving only a grinding allowance of 0.15 mm, and basically no machining is required. This reduces the processing equipment, shortens the production cycle, and saves energy and materials.