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挤压丝锥是内螺纹(尤其是对小尺寸内螺纹)实现无屑加工时的一种先进螺纹刀具,它具有切削丝锥所不及的许多优点。但是,目前在国内机械制造业中却尚未普遍使用。重要的原因是尚缺乏挤压丝锥的设计和应用方面的具有指导性的完整资料。本文主要结合加工实践谈谈小尺寸挤压丝锥使用中应注意的几个问题。一、对挤压前预钻孔的要求在所有影响挤压螺纹精度和光洁度的有关工艺参数中,预钻孔直径对其作用最为显著。
Extruded tap is an advanced thread cutter for internal thread (especially for small-size female threads) for chip-less machining, with many of the advantages that cutting taps can not have. However, it is not yet widely used in the domestic machinery manufacturing industry. The important reason is that there is a lack of guiding information on the design and application of squeeze taps. In this paper, the main combination of processing practice to talk about the use of small size extrusion tap should pay attention to several issues. First, the pre-drilling requirements before extrusion In all the impact of extrusion thread accuracy and finish of the relevant process parameters, the pre-drilled hole diameter of its most significant role.