What is the basic principle of shot peening?

　　The high-speed projectile (diameter 1~6mm) is used to hit the surface of the metal plate, so that the impacted surface and the underlying metal material will be plastically deformed and extended, so that the plate will gradually undergo two-way bending deformation that protrudes toward the sprayed surface.

　　Shot peening has different types according to different classification methods: according to different shot peening areas, it is divided into single-side shot peening and double-side shot peening; according to the driving mode of shot peening speed, shot peening is divided into centrifugal shot peening Forming, pneumatic shot peening and ultrasonic shot peening; according to whether the external load is pre-applied on the parts during shot peening, shot peening is divided into free state shot peening and prestressed shot peening.

　　The advantages of the shot peening process are very significant. First of all, this process does not require forming molds, and the process equipment is simple, which can save a lot of mold design and manufacturing time, greatly shorten the production preparation cycle and cost, and can quickly and flexibly respond to design changes, especially suitable for large-scale and relatively flat shapes. parts. Secondly, the length of the parts to be formed is not limited by the size of the equipment (the length can reach more than 35m). As long as the workshop site permits, the guide rail of the machine tool can be arbitrarily lengthened to adapt to large parts of any length. Again, shot peening helps to extend the fatigue life and corrosion resistance of the material.