The Effect on the Stamping Parts from Precision Control
First, the effect the time stamping parts to bend:
Generally use the A2 level press machine when the stamping parts is being bent forming. If the need of rebound precision stamping parts is strict, only use the A1 level press machine to meet the accuracy. In the bending process of stamping parts, the static accuracy of the quality press had little effect on the stamping parts, but the rigid presses have a certain impact on the stamping parts. In order to keep the rebound error in a minimum range so that the upper and lower die forging die, the correction curve is a better way. But caught in the punch and die sheet thickness between the existence of a range of fluctuation, because of the change of tension tensile strength and other mechanical properties, sometimes the bending stress can be several times the required minimum and make the press produce elastic deformation of precision on the stamping parts. Therefore, the different thickness of work piece materials is more important than the bending machine press specifications. If 2-level precision materials have no problem during the bending process of stamping parts, use the B2-level presses can get a good result. But sometimes this thick sheet metal is mixed with hard material, so that the mold produces overload.
Second, the impact of deep drawing stamping parts: in stamping, deep drawing, drawing number, ironing process, when the sheet metal into the die fillet after molded sheet only along the convex into the concave mold, punch crushed into small states, and its stamping parts processing under pressure than the nominal dead little more than drawing force due to stroke in the middle slider to the next dead continuous role in this period of time, so rigid on the stamping parts press bending little effect. If the same punch into the die by the pilot, press vertical is better, not much on the accuracy of stamping parts, so general use Class B2 presses will be able to meet the requirements.