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一、引言 在机械工业中,运用金属塑性变形的原理,通过外力和工具,使金属材料成形的方法已得到广泛采用。挤压丝锥就是应用这种原理来成形内螺纹的一种工具。
I. INTRODUCTION In the machinery industry, the principle of metal plastic deformation is adopted, and the method of forming metal materials has been widely adopted by external forces and tools. Extrusion tap is the application of this principle to form a thread of the tool.