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1982年我厂承接300吨摩擦压力机大螺母加工任务,大螺母的尺寸,形状及技术要求见图1。对于这种特殊的大螺母,在普通机床上没有专用刀具和夹具是无法加工的,因此我厂设计和制作了大型多头内螺纹车夹具和刀具,在普通C630车床上顺利地完成螺母加工。经生产验证,该车夹具和刀具操作简便,车削平稳,加工质量和生产效率都有很大提高。大型多头内螺纹车夹具和刀具见图2,其主要是由刀排,导排和夹具二部分组成。
In 1982, our factory undertook the task of processing large nuts of 300 tons friction press. The size, shape and technical requirements of large nuts are shown in Fig.1. For this special large nut, no special tools and fixtures can not be processed on ordinary machine tools, so I designed and manufactured large multi-head internal thread clamps and knives to finish the nut processing on ordinary C630 lathe. Production verified that the car jigs and knives easy operation, turning smooth, processing quality and production efficiency have greatly improved. Large multi-head internal thread clamps and tools shown in Figure 2, which is mainly composed of knife row, guide row and fixture two parts.