冲压工具.有圆柱头和直杆或者缩径柄的冲头

[中文适用范围]： 本国际标准规定了圆柱头直柄或缩径柄冲头的基本尺寸和公差（以毫米为单位）。 缩柄圆柱头冲头标准化为圆形、长方形、正方形和长方形。 本国际标准给出了材料及其硬度的示例，并规定了冲头的名称。 这些冲头的柄部直径 D1 为 3 毫米至 32 毫米。 本国际标准规定的冲头主要用途是在钢板上冲孔。 它们也可用于在其他材料上冲压。 [外文原描述]： ISO 8020 specifies the basic dimensions and tolerances, in millimetres, of punches with cylindrical head and straight or reduced shank. Cylindrical head punches with reduced shank are standardized in round, oblong, square and rectangular shapes. This International Standard gives examples of materials and their hardness and specifies the designation of punches in accordance with this International Standard. These punches are available with shank diameters from 3 mm to 32 mm. The main use of the punches specified in ISO 8020 is for punching holes in steel sheet. They may also be used for punching in other materials.