冷挤内螺纹是无切屑综合加工的方式之一,是用特制的挤压丝锥进行的。挤压丝锥不同于普通刀具,它有独特的几何形状和尺寸参数及加工工艺,故给设计和制造此种丝锥带来一些新的问题。一、挤压丝锥的工作原理在车床、钻床、虎钳或专用机械上,对具有一定廷伸率的钢材、铜、铝、铝合金等的内螺纹 Cold extrusion of the internal thread is a non-chip processing one of the ways is to use a special extrusion tap. Extrude taps different from ordinary knives, it has a unique geometry and size parameters and processing technology, so to design and manufacture of such taps bring some new problems. First, the working principle of extrusion tap In the lathe, drill press, vise or special machinery, with a certain rate of Ting steel, copper, aluminum, aluminum and other internal thread