论文部分内容阅读
为了了解低温微量润滑(CMQL)对车削加工残余应力的影响,基于加工残余应力形成的热力耦合理论,进行了5因素4水平的车削正交实验。实验以304不锈钢为实验材料,切削深度、切削速度、进给量、CMQL温度及冷却方式为影响因素,CMQL及干车削加工残余应力为实验指标。实验结果显示CMQL不锈钢车削加工残余应力为拉应力,小于干切削和常温微量润滑(MQL)的残余应力;CMQL对加工残余应力的影响程度从大到小依次为:切削速度、冷风温度、冷却方式、进给量和切削深度;CMQL有抑制加工残余拉应力作用,抑制程度受温度和冷却方式影响。
In order to understand the influence of low temperature micro-lubrication (CMQL) on the residual stress of turning, a 5-level and 4-level turning orthogonal experiment was carried out based on the thermodynamic coupling theory of machining residual stress. The experiment uses 304 stainless steel as the experimental material, cutting depth, cutting speed, feed rate, CMQL temperature and cooling mode as the influencing factors, and CMQL and the residual turning stress of the lathe machining are the experimental indexes. The experimental results show that the residual stress of CMQL stainless steel turning process is tensile stress, which is less than the residual stress of dry machining and normal temperature micro-lubrication (MQL). The influence degree of CMQL on machining residual stress is as follows: cutting speed, cold air temperature, cooling method , Feed rate and depth of cut; CMQL can inhibit the residual tensile stress of processing, the degree of inhibition is affected by the temperature and cooling mode.