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冷冲裁时,首先要根据冲裁力大小选择合适的冲床。根据冷冲裁力计算图,只要知道被冲裁板料的厚度、强度(或硬度)及工件直径(或线长度),就能够很方便的查到冲裁力。该计算图是根据冷冲裁力P=πdhσ_b计算出的。式中d——工件直径;h——板料厚度;σ_b——材料强度。图中的36条曲线是σ_b=38公斤/毫米~2时计算的,当材料强度大于38
Cold blanking, the first choice according to the size of blanking punch appropriate. According to the calculation of cold punching force, as long as you know the thickness of blanking sheet, strength (or hardness) and the diameter of the workpiece (or length), you can easily find blanking force. The calculation chart is calculated based on the cold punching force P = πdhσ_b. Where d - workpiece diameter; h - sheet thickness; σ_b - material strength. The 36 curves in the figure are calculated when σ_b = 38 kg / mm ~ 2. When the material strength is greater than 38