It is a springback phenomenon in stamping process, but what are the factors that affect the springback?
(1) the radius of curvature of the punch. The resilience of the stamping parts increases with the increase of the radius of curvature. With the decrease of the radius of curvature, it is appropriate to select the thickness below, but the minimum curvature radius of the bending plate must be considered.
(2) The radius of the shoulder corner of the die is too small. When the radius of the shoulder corner of the die is too large, the part opens outward and the part tilts inward after an hour. Generally, the thickness of the die is 2-4 times as thick.
(3) bending depth. The bending depth is small inside and outside, and the outward opening is reduced with the increase of depth. Generally, the bending depth of the stamping parts should be more than 4 times of the thickness of the plate.
(4) the gap between the convex and concave. When the gap between the convex and concave die is larger than the thickness of the plate, the plate can not fit well on the punch. The larger the radius of the corner is, the greater the rebound. On the contrary, the rebound almost eliminates, but it becomes inward. The general clearance of the stamping parts is better than the thickness of 0.O2 1 O.05mm.
In the processing of stamping parts, the factors that affect the rebound are the material material, the thickness of the plate, the pressure, the size and shape of the mold, and the effect of a variety of factors will affect the size of the rebound.