在仪表、轻工行业中,成千上万的各种小型零件上的小孔,都是由模具上的细小的头和凹模冲制而成的。这些细小冲头一般都在Φ0.5～Φ3毫米范围内,既不容易制作,又往往在最后一道工序磨刃口时折断而造成前功尽弃。在一副复杂的复合模和级进模上有许多这样的小冲头,只要其中一个冲头折断,整个模具必须进行修复, In the instrumentation, light industry, thousands of tiny holes in small parts are made from tiny heads and dies on a mold. These small punches are generally in the range of Φ0.5 ~ Φ3 mm, neither easy to make, but also often in the last process when the edge of the broken edge caused by the abolition. There are many such small punches on a complex compound die and progressive die. As long as one of the punches breaks, the entire die must be repaired,