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本文简述了切屑韧性(断裂变形)的测量方法,介绍了应用该测量方法对各种钢材切屑韧性的研究结果,并分析了影响切屑韧性的主要因素。1、切屑易折程度的评定—断裂变形断屑方法有多种形式,通常是切屑碰撞后刀面而折断的“后面碍障式”。这种形式的断屑机理如图1所示:设切屑流出时的卷曲半径为R_o,则①其前端碰到后刀面,阻碍其继续行进;②切屑内侧(锯齿形一侧)受到弯曲力矩作用,形成一种张力,弯曲力矩以切屑越过
In this paper, the measurement methods of chip toughness (fracture deformation) are briefly introduced. The research results of the chip toughness of various types of steel using this measurement method are introduced. The main factors affecting the chip toughness are also analyzed. 1, Evaluation of the degree of chip easy to fold - Fracture deformation There are many forms of chip breaking, usually after the chip collision knife face and broken “behind the barrier type.” The chip breaking mechanism in this form is shown in Figure 1: Suppose the curl radius when the chips flow out is R_o, ① the front end of the chip touches the flank surface to prevent it from proceeding; ② The inner side of the chip (serrated side) The role of the formation of a tension, bending moment to chip crossed