文档介绍：
钛合金铣削加工中切削温度的三维有限元
模拟研究#
杨勇,李奎荣*
5
10
(青岛理工大学机械工程学院,山东青岛 266033)
摘要:结合航空钛合金立铣加工的实际情况,提出了主、副切削刃同时进行切削的螺旋齿双
刃切削有限元模型,构建了切削加工环境下的材料本构关系模型,并采用了适合钛合金加工
特性的绝热剪切模型。利用该有限元模型对航空钛合金 Ti6Al4V 进行了铣削加工切削温度
的三维数值模拟,获得了铣削过程中切削温度的变化曲线和数值,结果表明最高切削温度位
于刀屑接触区域,且更加靠近切削刃,并且前刀面温度高于后刀面温度。通过改进的切削温
度实验测得了相同切削条件下的切削温度,实验结果与有限元模拟结果较为一致,证明所建
立的有限元模型是正确的,可用于预报切削温度。
关键词:钛合金;铣削加工;双刃切削;切削温度;有限元模拟
中图分类号:TG501;V261
15
Three-dimensional finite element simulation of cutting
temperature during milling of titanium alloy
YONG Yong, LI Kuirong
(Mechanical Engineering School, Qingdao Technological University,
20
Abstract:
ShanDong QingDao 266033)
A finite element model of helix double-edge cutting was developed to study the
ending milling process of titanium alloy Ti6Al4V. To improve the accuracy of finite element
simulation, a new method to construct material constitutive model was adopted, ant the adiabatic
shear model was also applied. Three-dimensional numerical simulation of cutting temperature was
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carried out with major and minor cutting edge, and cutting temperature curves during milling
process were obtained. An analysis indicates that the highest cutting temperature lies in tool-chip
interface and is more close to cutting edge; moreover, the temperature is higher in tool face than
tool flank. The semi-artificial thermo-couple cutting temperature experiment was improved by
substituting constantan band for constantan wire. With the new cutting temperature experiment,
the cutting temperature curves during milling process were obtained. A good agreement between
simulation and experimental value was achieved, which proves that the finite element model
presented in this paper is correct, and cutting temperature can be predicted by using this model.
This work lays the foundation for milling parameter optimization and provides a new way to
control machining distortion caused by thermal stress for titanium alloy aviation monolithic
component.
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