How to calculate the gap between the convex and concave molds in the production of stamping parts?

When the V-shaped stamping part is bent, the gap between the punch and the female mold is controlled by adjusting the closing height of the press, and it does not need to be considered when designing and manufacturing the mold; for the U-shaped stamping part, the punch and the female mold The gap value between the parts has a great influence on the springback, surface quality and bending force of the bent stamping parts; if the gap value is too small, the required bending force is large, and the side wall thickness of the part will be thinned, reducing the die Service life, at the same time, it will scratch the straight wall of the workpiece and affect the appearance of the product. The gap value is too large, the rebound of the bent part increases, and the accuracy of the workpiece is difficult to guarantee; the unilateral gap value between the punch and the die can generally be as follows Calculation; Z u003d tmax + Ct u003d t + Δ + Ct where the unilateral clearance between the Z bending punch and the concave mold (mm); the nominal size of the t material thickness (mm); the maximum value of the tmax material thickness (mm); the C clearance coefficient Δ The upper limit deviation of material thickness (mm). In the production of stainless steel stamping parts, the gap between the convex and concave molds depends on the accuracy and appearance requirements of the workpiece. Generally, it is selected according to 8% to 12% of the material thickness (single side), but the absolute value is not less than 0.04mm. The material with the film can be bent together with the film, and then the film is torn off after forming. Recommended article: Stamping parts processing factory talk about the fillet radius of the convex and concave molds Previous: What are the main factors that determine the quality of the section of metal stamping parts?