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钛合金铣削加工中切削温度的三维有限元模拟研究
发表时间：2013-10-31 浏览量：1691 下载量：772
| 全部作者： | 杨勇，李明 |
| 作者单位： | 青岛理工大学机械工程学院 |
| 摘 要： | 结合航空钛合金立铣加工的实际情况，提出主、副切削刃同时进行切削的螺旋齿双刃切削有限元模型，构建切削加工环境下的材料本构关系模型，并采用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： | 机械制造自动化；钛合金；铣削加工；双刃切削；切削温度；有限元模拟 |
| Title： | Three-dimensional finite element simulation of cutting temperature during milling of titanium alloy |
| Author： | YONG Yong, LI Ming |
| Organization： | College of Mechanical Engineering, Qingdao Technological University |
| Abstract： | 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, and the adiabatic shear model was also applied. Three-dimensional numerical simulation of cutting temperature was carried out with major and minor cutting edge, and cutting temperature curves during milling process were obtained. The analysis indicated that the highest cutting temperature lied in tool-chip interface and was more close to cutting edge; moreover, the temperature was 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 proved that the finite element model presented in this paper was correct, and cutting temperature could 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. |
| Key words： | mechanical manufacturing and automation; titanium alloy; milling process; double-edge cutting; cutting temperature; finite element simulation |
| 发表期数： | 2013年10月第20期 |
| 引用格式： | 杨勇，李明. 钛合金铣削加工中切削温度的三维有限元模拟研究[J]. 中国科技论文在线精品论文，2013，6（20）：1901-1910. |
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