摘要
为研究涂层在切削中对刀具温度的影响,为设计刀具涂层提供理论依据,分析高速切削过程中切削热的产生和刀具边界情况,建立单涂层刀具热传导物理模型和数学模型,用数学解析的方法推导出正交高速干切削过程中单涂层刀具体内部的温度分布公式。利用推导出的温度公式对TiN、TiC、Al2O3涂层刀具的切削温度分布进行解析计算,并将解析计算结果与数值分析结果进行比较。结果表明,解析计算结果与数值计算结果吻合很好;涂层材料与基体材料的热物理性能以及涂层的厚度对刀具的温升有重要影响;随着热流密度的增加,涂层厚度对刀具内部的温度影响增大。
In order to research the influence of coating on tool temperature during cutting, so as to provide theoretical basis for the design of tool coating, the generation of cutting heat and the tool boundary condition in the high speed cutting process are analyzed, and the physical and mathematical models of single-coated tool heat conduction are built. The interior temperature distribution formula of single-coated tool in the orthogonal high speed cutting process is derived by using mathematical analysis method. Analytical calculations of the cutting temperature distributions of TiN, TiC, Al2O3 coated tools are carried out by using the derived temperature formula, and the result of analytical calculation is compared with that of numerical analysis. The comparison shows that they are in good agreement. The thermophysical properties of coating material and substrate material and the thickness of coating have important influence on temperature rise. With the increase of heat flow density, the influence of coating thickness on the interior temperature of tool is enhanced.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2010年第1期187-193,198,共8页
Journal of Mechanical Engineering
基金
国家重点基础研究发展计划(973计划
2009CB724401)
国家自然科学基金(50828501
50675122)资助项目
关键词
高速正交切削
单涂层刀具
瞬态温度分布
High speed orthogonal cutting Single-coated cutting tools Transient temperature distribution
