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过去用普通压力机下料为冷挤压提供毛坯,因切口质量不好,往往需要校正等工序才能满足需要。最近使用下述两种方法: 1.用较高的速度在压力机上剪切,剪切速度约90—150毫米/秒; 2.用封闭模在较高的速度下剪切。西德May PresS 厂生产的MSR32型精密棒料剪切机即属此类。
In the past with ordinary press blanking to provide rough extrusion, due to poor quality incision, often need to be corrected and other processes to meet the needs. Recently, the following two methods have been used: 1. Shearing at a higher speed with a press at a shear rate of about 90-150 mm / sec; 2. Shearing with a closed mold at a higher speed. The MSR32 precision bar stock shears from May PresS in West Germany fall into this category.