基于切削比能的高速干切工艺刀具温升调控方法

Regulation and Control Method for Tool Temperature in High-speed Dry Cutting Processes Based on Specific Cutting Energy

高速干切中,较高的切削速度和切削液的缺失使得切削热短时间内在刀具上大量聚集,造成刀具磨损并影响使用寿命,解决该问题的有效手段是控制刀具温度升高。通过分析高速干切削加工过程中切削热在刀具中的传递与作用特性,基于切削比能和切屑几何形貌建立高速干切刀具的温升模型,在此基础上以温升最小为目标,以切削速度、进给量、刀具主偏角为变量,提出一种刀具温度调控方法,并结合高速干式车削加工案例进行应用与验证分析。

The high cutting speed and the lack of cutting fluid during high-speed dry cutting made cutting processes heats accumulated on the cutting tools in a short time,which affectd the wear and service life of cutting tools seriously.The temperature rise control was an effective means to solve the tool thermal problems.The heat transfer characteristics of the cutting tools were analyzed during high-speed dry cutting processes.Temperature control model was established based on specific cutting energy and chip geometry.Then,a tool temperature control method was proposed with the minimum temperature rise as the target and the cutting speed,feed rate and tool cutting edge angle as variables.And,a case study on high-speed dry turning was conducted to verify the proposed tool temperature control method.