First, the curvature radius of the punch. During the processing process of hardware processing, the rebound volume increases with the increase of curvature radius. As the curvature radius decreases, although different raw materials are slightly different, the thickness of the plate is generally lower than the thickness of the plate. Consider the small curved curvature radius. Stainless steel hardware processing
Second, the radius radius of the shoulder of the concave mold is too small; the rounded corners of the shoulder are too large, and the small tilt inward. It is usually 2-4 times the thickness of the board.
Third, the drooping gap in the convex mold. When the gap between the punch is thicker than the board, the board cannot be adhered to the punch well. The larger the radius of the rounded corner, the larger the rebound; on the contrary, when the gap is too large, the rebound almost disappears, but is tilting inward. The general gap in metal stamping parts is 0.02o 0.05mm thicker than the plate.
Fourth, bending depth. The curved inner diameter and outer diameter increased, and the outer diameter decreased as the inner diameter increased. The bending depth of ordinary metal stamping parts should be more than 4 times that of the thickness of the board.
