Stamping is a pressure processing method that uses a stamping die to apply pressure to a material on a press at room temperature to produce plastic deformation or separation to obtain the desired shape and size of the part. This processing method is commonly referred to as cold stamping. Although various types of stamping dies have different structural forms and complexity, and the components that make up the dies are diverse, they are always divided into upper and lower molds. The upper mold is generally fixed to the slider of the press through the mold handle, and moves up and down along the press guide rail together with the slider. The lower mold is fixed to the workbench of the press.