Design has always played a very important role in production work, which must be easy for everyone to understand. The same is true for stamping parts. In actual work, different methods can be used to design stamping blanks. There are currently four commonly used methods. Below we will explain in detail for each different method, hoping to help.
The first method is called the slip line method. However, if this method is adopted, certain prerequisites must be met. The basic assumption about the slip line method is this: the thickness of the sheet flange remains the same, and it remains in a plane strain state, the material is isotropic, there is no hardening, and the impact on friction is also ignored. However, because the sliding line method of stamping parts is quite complicated in calculation, it is difficult to generalize.
The second method is called the geometric mapping method, which is also proposed under the assumptions. After we ignore the deformation force, stress-strain relationship and boundary friction, we combine some assumptions to realize the mapping of workpiece to blank. In the research, we found that the geometric mapping method of stamping parts will be affected by the discrete precision. The determination of reasonable discrete precision will also have a certain impact on the computer's calculation speed and deployment accuracy.
The third is the empirical method. This method is easy to understand. To put it simply, we have found some experience from previous processing cases. This method is mainly applied to malleable stamping parts with relatively simple shapes, such as rotating and bending parts. In general, this method will have a certain deviation in accuracy, because many factors need to be considered.
There is also a method called simulation. Relatively speaking, this method is still used more often. When using this method, certain assumptions are also required, combined with the similarity of the mathematical description of some physical problems, through the mathematical similarity theory, and then forming a model to simulate the metal flow of the sheet flange to process the stamping Pieces.
