板料的精密冲裁改变了普通冲压的毛坯生产性质,可以直接从板料精冲出成品零件。按照DIN1543德国工业标准,以料厚t对冷冲钢板分类,t3mm为薄板,3mm≤t≤4.75mm为中厚板,t4.75mm为厚板。用精冲工艺冲制中厚板、厚板零件,尤其形状复杂的片齿轮、凸轮、棘轮、飞机刹车摩擦片等零件 Sheet blanking precision blanking changes the nature of ordinary stamping blanks, blanks can be finished directly from the finished sheet metal parts. According to DIN1543 German industrial standards, the material thickness t on the cold-rolled steel classification, t3mm for the plate, 3mm ≤ t ≤ 4.75mm for the plate, t4.75mm for the plate. Punching heavy plate, heavy plate parts, especially parts with complex shapes, such as cams, ratchets and aircraft brake linings