基于稳态斜角切削的立铣加工热力建模动态求解  

Thermo-mechanical Modeling and Dynamic Solution on Steady State Process of Spiral End Milling

作　　者：闫国栋[1] 冯勇[1] 贾丙辉[1] 贾晓林[1] 

机构地区：[1]南京工程学院机械工程学院,江苏南京211167

出　　处：《机床与液压》2017年第7期54-58,共5页Machine Tool & Hydraulics

基　　金：江苏省自然科学基金资助项目(BK20150728;BK20131341);南京工程学院引进人才科研启动基金(YKJ201302)

摘　　要：为研究螺旋齿立铣加工的切削力和温度分布规律,基于稳态斜角切削理论,提出了立铣加工切削力和切削温度的动态求解方法,研究了AISI1045钢在特定工况下的切削力和温度变化情况。结果表明:切削力Fx、Fy及Fz的最大值分别为198、40和90N,与试验数据的误差分别为2%、20%和10%;刀屑区最大温度Tmax的变化呈现出3个典型的非线性变化阶段,其中前两个阶段的温度变化比较显著,最大温度值为150℃,与试验数据的误差为10%,结果基本吻合。研究表明所提出的方法可以较为准确地研究铣削加工中的切削力和温度分布情况。A method of dynamic solving cutting force and cutting temperature in end milling was established based on steady state oblique cutting principle in order to study the distribution cutting temperature and cutting forces in process of spiral end milling. The change of cutting temperature and cutting forces of AISI1045 steel in a certain operating condition was studied. Results indicate that the maximum of Fx, Fy and Fz are 198, 40 and 90 N respectively, the deviation between calculated and measured value are 2%, 20% and 10% respectively. The maximum temperature Tmax of tool-chip area appears three typical nonlinear phases of changing, among which the temperature of the first and second phase has a significant change, the maximum temperature is about 150 ℃, the deviation between calculated and measured value is 10%, which show the well agreement. Study shows that the established method can be used to investi- gate the thermo-mechanics of workpiece accurately in milling process.

关 键 词：螺旋立式铣削 热力建模 切削温度 切削力 

分 类 号：TG501[金属学及工艺—金属切削加工及机床]