文档介绍：RED CD
Blanking is the use of molds to produce separate sheet stamping processes subjects, including blanking and punching. It can be made into parts, but also for the bending, drawing, forming and other processes to prepare rough.
Washed down from the Board Division on the shape of the parts required (or rough) called off the branches.
The shape of the workpiece out of the hole required (red to go to waste) is called punching.
Figure I-1 of the washer, from falling branches and punching two processes plete. Production practice, we die blanking process of a certain understanding of the structure, but perceptual knowledge to rational knowledge up to truly understand the nature of the blanking process, a better design of the development process and die. The following deformation on the blanking process, the quality of stamping parts, stamping die design and stamping die size blade structural design issues discussed. .
Section blanking deformation mechanism
Blanking process
Shown in Figure 1-2 blanking by the deformation process can be seen that position of the punch and the upper and lower concave edge chess, material on the concave mold, punch the material deformation gradually decreased until pletion of all the separate blanking. With the punch of the external forces acting on material changes in the number of the material on the external force changes in quantity, material deformation within the continuous development.
The deformation of the blanking process is divided into three stages (Figure 1-2).
1, elastic deformation stage
Punch contact with material force as the punch pressure, the material is pression and bending, and squeeze into the die hole. Then the stress does not exceed the material yield limit, if the punch relief, material or restitution, so that elastic deformation stage.
2, plastic deformation
Punch to pressure, the stress reaches the yield limit of material, some metal is squeezed into the die hole, producing plas