Development and application of fine blanking process (FB fine blanking)

Netizens ask: What are the commonly used precision stamping technologies? Can you give a brief introduction? 　　Metal stamping manufacturer: So far, there are still some simple precision blanking processes, as a supplement to FB precision blanking technology, in some shapes are simple and only partial In factories that require fine blanking, small size, small output, and no special fine blanking equipment, popularization and application can also achieve good technical and economic benefits. These fine blanking technologies are as follows: 　　 (1) Ordinary press fine blanking technology a, refurbishment ——Use a special trimming die to trim the punching surface of blanking and punching blanks to obtain a straight, smooth and high-precision punching surface, including: outer edge trimming, inner hole trimming, and stack trimming , Vibration refurbishment, etc. b. Smooth punching-use special punching dies with special structures such as micro-gap or negative-clearance rounded edges to perform smooth punching of high-plasticity low-carbon steel and non-ferrous metal punching parts to obtain smooth and smooth high-precision punching section. Commonly used smooth blanking processes include: micro-clearance rounded edge smooth blanking, negative clearance smooth blanking, stepped punch fine punching, synchronous cutting and extruding fine blanking, extrusion fine punching, and burr-free blanking, etc. . (2) Fine-blanking technology of special fine-blanking machine a. The spirit of strong press board-the use of different structures of strong press board for blanking, reverse top and fine blanking (FB), including: has been popularized for production The fine blanking technology with strong edge blanking with V-shaped gear ring and the less used fine blanking method with serrated pressing plate, conical pressing plate, and convex pressing plate...etc. b. Fine blanking of opposite dies-using the principle of plane cutting, the upper and lower corresponding pairs of punches and dies are used for punching according to the specified degree. It was invented by the Japanese in 1968 and has been promoted for production in Japan. Fine blanking technology. It is also used in the country but has not been popularized.　　C, double movement and reciprocating fine blanking-not promoted and applied. In the production of various electromechanical and home appliance stamping parts on site, the actual needs and the number of blanking parts that can be integrated fine blanking are limited. Moreover, a considerable part of the punching parts only need local fine blanking, especially if only a small part of the group hole and group slot hole is fine punched, it is more economical to apply ordinary press fine blanking technology; for only local fine blanking to obtain high-precision hole shape The inner shape or part of the outer shape of the blanking parts with a distance between the holes, no burrs, and a smooth and smooth cutting surface can be smoothly punched to meet the requirements.