the parts were pressed. In parts surface compressive stress at the same time, improve the parts surface microhardness, wear resistance and corrosion resistance, extend the fatigue life.
Ultrasonic grinding device, the workpiece surface hardening layer, the layer with the internal materials have obvious stratification, easy to cause surface layer falls off. Technology is difficult, improper handling, easy to cause waste. Transmission mechanism to machine tool guideway, damage is very big, seriou