The adaptability of sheet metal to various stamping processes is called the stamping and forming function of sheet metal. In short, it refers to whether the precision stamping parts fabrication plant can use a simple process to efficiently produce high-quality metal stamping from blanks. pieces.
Sheet metal forming capability is a complex feature because it is associated with a very complex forming environment. Generally speaking, the sheet metal forming function depends on the pressure, tension, stretching rate, temperature and other factors related to the resistance of the metal to elongation and cracking. big. The sheet metal forming process is not constant, but a process of gradual change. The distribution of pressure and tension depends on many important process parameters, such as die design, size and shape of automotive stampings and lubrication. Manipulating these parameters, as well as some underlying material parameters, can increase the degree of plastic deformation of the metallic material before cracking. Although there are many factors that can affect the sheet forming function, only some of the factors that are important and well-recognized are reviewed here. If these elements are generally divided into fabrication elements and material elements, such as mold geometry parameters, mold material, pressure plate, lubrication, pressure speed, etc. can be divided into fabrication elements. In general, the fabrication factor determines the characteristics of the external load on the sheet, while the material factor determines the material’s response to the applied load.
The main factors that affect the sheet metal stamping function are:
- 1. Crack resistance (forming limit) refers to the large deformation degree that can be achieved during the sheet forming process, and the material does not crack under this deformation degree. The metal stamping forming limit is the fracture resistance of the material during stamping. The better the stamping and forming function of the material, the better the fracture resistance of the material, and the higher the forming limit.
- 2. The mold fit refers to the ability of the sheet to achieve consistency with the shape of the mold during stamping. There are many factors that affect the mold fit. The few defects such as restraint, warpage, collapse and rise in the forming process will make the mold fit. reduce.
- 3. Formability refers to the ability of metal stamping parts to maintain their existing shape in the mold after demoulding. The larger the forming limit, the better the mold fit and shapeability, the better the stamping function of the material. The main factor that affects the shapeability is the springback. After the part is demolded, a large shape error is often caused due to the excessive springback.
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