Stamping processing plant in stamping parts processing, will find that stamping parts often appear after processing rebound phenomenon. There are many factors that affect the rebound of stamping parts, such as parts material, material thickness, punching pressure, mold size and shape. Next, China metal stamping will be a specific explanation.
(1) Radius of curvature of die base. Chinese metal stamping, although the material is not the same, also slightly different, but the general choice of material thickness is appropriate. It is also necessary to consider the lower limit of the curvature radius of the bending material.
(2) The size of the radius of the rounded corner of the cavity shoulder. Cavity shoulder arc half through large parts outward, large parts inward skew. Generally choose material thickness of 2 ~ 4 times.
(3) Bending depth. When the bending depth is small, the inner and outer extension is large, and the outward extension decreases with the increase of the depth. Generally, the bending depth should be above 4 times the thickness.
(4) the gap of concave and convex touch. When the gap of the concave and convex die is larger than the thickness of the material, the material will not fit very well on the die base. The larger the arc radius of the die base, the greater the springback force. Conversely, when the gap is too large, the springback force is basically removed, but transformed into inward skew. Generally, the gap is 0.02-0.05mm smaller than the thickness of the material.