一、什么是刀具耐用度一把新刃磨的刀具,在切削过程中会逐渐磨损变钝。当磨损到一定程度后,刀具就不能继续切削,否则将影响工件的尺寸精度和表而光洁度。刀具从开始投入切削直到磨损至必须重新刃磨为止,所经历的切削时间,称为刀具耐用度。通常以分钟数表示。二、刀具磨损的原因我们知道,切削金属时,在刀具的作用下,金属层在发生很剧烈的变形后形成切屑。变形要产生很大的抗力和大量的热。同时,切屑底层与前刀 First, what is the durability of a new tool grinding tool, the cutting process will gradually wear dull. When the wear to a certain extent, the tool can not continue cutting, or it will affect the dimensional accuracy of the workpiece and surface finish. Cutting tools from the beginning until the wear and tear must be regrinding up until the cutting time, known as the tool durability. Usually expressed in minutes. Second, the reasons for the tool wear We know that cutting metal, the role of the tool, the metal layer in the occurrence of very severe deformation after the formation of chip. Deformation to produce great resistance and a lot of heat. At the same time, chip bottom and front knife