Introduction to the shaping process of bent stamping parts

Shaping is generally used after drawing, bending or other forming processes. Shaping can improve the accuracy of the size and shape of the drawn part or bent part, and reduce the fillet radius. The shaping mold is similar to the general forming mold, except that the accuracy and surface roughness of the working part are higher, and the fillet radius and the gap between the convex and concave molds are made smaller. Due to the different geometry, precision and shaping content of various stamping parts, the shaping methods used are also different. There are mainly two types of shaping methods for bending stampings: pressing and upsetting. 1. Press school. The characteristic of the compression calibration is that the stress distribution is roughly uniform, which is easy to achieve for the bending stamping parts with symmetrical areas on both sides, otherwise, attention should be paid to the reasonable arrangement of the bending stamping parts in the mold. When pressing and calibrating U-shaped stampings, if you simply shape the rounded corners, you should use two rounds, each time only one rounded corner, to have a better shaping effect. The pressure correction is especially suitable for the shaping of bending stamping parts and symmetrical bending stamping parts. 2. Upsetting school. The length of the punched part before upsetting should be slightly larger than the length of the part, so that while the material in the length direction is filled into the deformation zone during deformation, it is still subjected to extreme compressive stress to produce a small amount of compression deformation, which changes in essence. The original stress state in the material is put into a three-way compressive stress state, and the compressive stress distribution in the thickness is also relatively uniform, so the shaping effect is good. However, the application of this method is often limited by the shape of the part. This method is not used for curved parts with large holes and unequal widths, otherwise it will cause inconsistent deformation of the hole shape and width. 3. For the shaping of straight-wall deep-drawn stamping parts, the negative gap deep-drawing shaping method is generally used. The convex and concave mold gaps of the shaping die Zu003d(0.9～0.95)δ, and the straight wall becomes slightly thinner during shaping. The shaping process is often combined with the last drawing process, and the drawing coefficient should be larger at this time. Article recommendation: Layout design of multi-station progressive die used in stamping parts processing Previous: Stamping parts processing plant introduces the reason for the cracking of cover parts during forming?