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1.引言内螺纹的加工与其它的加工方法一样,对刀具的要求提高了。特别是机用丝锥要承受较大的负荷,因为它要自动的切入工件,此外,刀具耐用度要高,所加工出的螺纹的尺寸要精确而光洁。攻丝需要有一种结构合理的刀具,因为,对丝锥的要求比对其它刀具的要求高。为了在切削效率较理想的情况下,被加工螺纹获得高的精度,必须充分利用所有的条件——首先是刀具的结构和刀刃的几何角度及使用条件——来改善机用丝锥。普通的直槽单丝锥(该种丝锥能在一次进
1. Introduction Internal thread machining is the same as other machining methods and the requirements on the tool are increased. In particular, machine tap to bear a greater load, because it will automatically cut into the workpiece, in addition, the tool to high durability, the size of the thread to be machined to be accurate and smooth. Tapping requires a well-structured tool because the requirements for the tap are higher than for other tools. In order to achieve high accuracy of the machined thread with better cutting efficiency, it is necessary to take full advantage of all the conditions - first, the geometry of the tool and its geometry and the conditions of use - to improve the machine tap. Ordinary straight trough single tap (the kind of tap can be in one