摘要
针对正交干切削加工过程,建立了刀具与切屑接触区域温度场数学物理模型。模型采用绝热半无限介质热源叠加的方法,计算出切屑剪切变形区和"刀具-切屑"摩擦区叠加影响下刀具与切屑在接触区的温度场,分析了最高温度产生位置及其机理。基于该模型,对锋利PCBN刀具硬车削轴承钢过程的温度场进行预测,得到的刀具与切屑接触面温度在多个切削速度条件下误差均小于8%,说明该模型能够实现对锋利切削加工温度场的精确预测。
A theoretical model is proposed to predict the temperature distribution on the tool and chip in orthogonal cutting process. A semi-infinite adiabatic method is applied to predict temperature rises due to shear in the shear band and friction between the tool-chip interfaces. Temperature distributions in the tool and chip are obtained theoretically in machining bearing steel using sharp PCBN tool. Results indicate that the deviations are is less than 8% under several simulation cutting speeds, and the accuracy of the theoretical model is then evaluated.
出处
《机械设计与研究》
CSCD
北大核心
2011年第3期94-97,共4页
Machine Design And Research
基金
国家高档数控机床与基础制造装备重大专项(2009ZX04001-121)
上海交通大学研究生创新能力培养专项基金资助(AE020202)
