The leveling and shaping process of scaffolding stamping parts

The amount of deformation allowed for leveling and shaping is very small, so the shape and size of the blank must be very close to the part. After leveling and shaping, the precision of the parts is high, so the precision requirements for the forming part of the mold are correspondingly improved. When leveling and shaping, the stress and strain state in the blank should be beneficial to reduce the elastic recovery of the shape and size of the part due to the elastic deformation of the material after unloading. Because leveling and shaping need to be carried out at the bottom dead center of the crank press. Therefore, the precision and rigidity of the equipment are required to be high, and it is usually carried out on a dedicated precision press. If an ordinary press is used, an overload protection device must be provided to prevent equipment damage. Leveling is mostly used for blanking parts to eliminate unevenness caused by arching during the blanking process. For thin materials and parts that do not allow indentation on the surface, smooth leveling molds are generally used; for thicker ordinary parts, tooth-shaped leveling molds are generally used. Shaping is generally used after the bending and deep drawing process. The shaping mold is similar to the general forming mold, except that the working part has a high precision in the shape and size, the surface roughness value is lower, and the fillet radius and gap value are small. When shaping, it is necessary to correctly select the position of the plastic deformation, the size of the deformation, and the appropriate stress and strain state according to the characteristics and accuracy requirements of the shape of the part. The dimensional accuracy of the workpiece obtained by the upsetting of the bent part is high, and it is a leveling method often used at present. However, for bending parts with holes or bending parts with unequal widths, upsetting is not suitable, because the holes are easily deformed during upsetting. The shaping of the drawing parts adopts the negative clearance drawing shaping method, and the clearance can be 0.9~0.95 times the material thickness. The shaping process and the last drawing process can be combined into one process to complete. Related news: The characteristics of the main materials of stamping parts, the treatment of common problems of stamping parts, the characteristics of scaffolding stamping parts and the importance of inspections