Characteristics Of Metal Stamping And Drawing Parts Of Rotating Body

Metal Stretch Forming Metal Stamping Stamping Parts

1. The shape similarity principle of stamping products, the shape of the blank of the metal stamping and drawing parts is generally similar to the shape of the cross-sectional contour of the drawing part, that is, when the cross-sectional contour of the stamping and drawing is circular, square or rectangular, the shape of the corresponding blank should be They are circular, approximately square, or approximately rectangular, respectively. In addition, the perimeter of the blank should have a smooth transition to obtain a side wall of equal height (if the metal stamping product requires equal height) or a flange of equal width;

2. The principle of equal surface area of stamping and drawing parts. For constant thinning, although the thickness of the metal stamping product sheet is thickened and thinned during the drawing process, practice has proved that the average thickness of the stamping and drawing parts is the same as The thickness of the blanks is comparable, and there is not much difference. Since the volume does not change before and after plastic deformation, the size of the blank can be determined according to the principle that the area of the blank is equal to the surface area of the metal stamping part;

3. Using theoretical calculation methods to determine the blank size of metal drawing parts is not completely accurate, but approximate, especially for drawing and stamping products with complex shapes; in actual production, for drawing and stamping parts with complex shapes, it is usually the first Do a good job of stamping and drawing dies, and perform repeated die trial corrections with the blanks initially determined by the theoretical calculation method until the workpiece meets the requirements, and then use the actual blank shape and size as the basis for manufacturing the blanking dies;

4. Since the sheet metal has plate plane directionality and is affected by factors such as the geometry of the die, the mouth of the finished deep-drawn stamping parts is usually irregular, especially the deep-drawn parts. Therefore, in most cases, it is necessary to increase the height of the process part or the width of the flange. After the metal stamping and drawing, the edge trimming process is performed to ensure the quality of the metal stamping and drawing parts.