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- Time：2023/2/27 Posted：Hong Kong Eposh Technology Co., Ltd.
- The shell stretch stamping part is a stamping part processed by using stretch technology. Drawing is to press the flat metal sheet into the die through the movement of the punch. The shell drawing stamping parts are widely used, such as automobile parts, household products, electronic equipment, etc.
The shell stretch stamping part can stretch the sheet into a cylindrical bottle part; In the drawing operation, the diameter of the blank is affected by the circumference of the shell, and the circumference is affected by the fluidity of the stamping material and the inward flow resistance and edge resistance of the peripheral material; When the resistance of the edge material exceeds the limit, the edge will wrinkle and become unstable.
In order to avoid wrinkling, the stamping material must be able to flow smoothly between the punch and the blank holder. The two main reasons for tensile fracture are that the ratio of the diameter of the drawing stamping part to the diameter of the blank exceeds the limit value, and the drawing radius is drawn from the flat blank to the shell, and when the shell is drawn to the shell with smaller diameter, there is a limit value for the inward flow distance of the material, which is usually called the tensile coefficient.
The ultimate tensile coefficient is affected by such factors as the material fluidity of the stamping parts, the material compression capacity and the flow resistance caused by compression. Excessive flow resistance causes the shell edge to be damaged and wrinkled, which is the area with the weakest material resistance.
Jenny
