摘要
基于Deform 3D建立无氧铜切削加工模型,分析不同切削参数下切削力、切削温度以及应力应变对无氧铜切削加工断屑的影响,并对无氧铜切削加工进行实验.结果表明:在相同的进给量和切削深度下,切削速度从100m/min增至600m/min,切削过程中产生的切削力和剪切应力逐渐减小,切削温度增加,等效应变先增加后减小;切屑与工件碰撞产生的局部应力集中与刀—屑接触处的应力集中相互作用,使切屑断裂.进给量和切削深度影响切削速度的断屑域,当进给量为0.1mm/r,切削深度为0.05mm时,切削速度的断屑域为100～400m/min;当进给量为0.1mm/r,切削深度为0.1mm时,切削速度断屑域为200～400m/min;当进给量为0.15mm/r,切削深度分别为0.05mm,0.1mm时,切削速度加工域为200～500m/min.
Abstract
An oxygen-free copper cutting model is established based on Deform 3D to analyze the effects of cutting force,cutting temperature and stress-strain on chip breaking in oxygen-free copper cutting under different cutting parame-ters,and experiments are conducted on the process of oxygen-free copper cutting.The results show that under the same feed rate and cutting depth,the cutting speed increases from 100m/min to 600m/min,the cutting force and shear stress decrease gradually,the cutting temperature increases,and the equivalent strain increases first and then decreases.The local stress concentration caused by the collision between the chip and the workpiece interacts with the stress concentration at the tool-chip contact to make the chip fracture.Feed rate and cutting depth will affect the chip breaking zone of cutting speed.When the feed rate is 0.1mm/r and the cutting depth is 0.05mm,the chip breaking zone of cutting speed is 100～400m/min.When the feed rate is 0.1mm/r and the cutting depth is 0.1mm,the chip breaking zone of cutting speed is 200～400m/min.When the feed rate is 0.15mm/r and the cutting depth is 0.05mm and 0.1mm respectively,the cutting speed process-ing domain is 200～500m/min.
维普
万方数据