The deformation process of head spinning processing
During the spinning process, the head is transformed from a flat circular plate blank into an elliptical head. The circular plate blank is subjected to compression in the circumferential direction and tension in the radial direction, but it is different from drawing processing. During spinning, the roller and the blank are basically in point contact, and the blank undergoes two types of deformation under the action of the roller: one is local plastic deformation of the material in direct contact with the roller; Another way is for the billet to collapse in the direction of roller pressure. It is important to control the rollers during operation. Improper operation can cause material instability, wrinkling, shaking, or tearing.
When spinning, it is important to choose a reasonable spindle speed, the transitional shape of the shape, and the magnitude of the roller pressure. If the spindle speed is too low, the billet will be unstable; If the speed is too high and the material comes into contact with the roller too frequently, it is easy to over roll it; The reasonable rotational speed is related to the type, thickness, and core mold diameter of the material. When the diameter of the billet is large and the thickness is small, the rotational speed can be small, and vice versa.