Incoloy 901涡轮榫槽拉刀仿真优化设计
2020-10-27
作者：黄祥辉，明伟伟，安庆龙，徐锦泱，陈明
单位：上海交通大学机械与动力工程学院
摘要：涡轮榫槽作为叶片和轮盘连接部位，对表面质量和几何精度有着严格的要求，而榫槽成型拉削的关键要素是拉刀设计。本文通过有限元仿真方法研究了拉刀几何参数对切削过程中刀具应力和切屑形状尺寸的影响规律。通过SolidWorks软件等比例建立拉刀几何模型，导入AdvantEdge软件建立拉削仿真模型，并选择切屑曲率半径、切屑厚度作为标准进行验证，误差在可接受范围内。结合加工经验制定仿真方案，研究了齿升量、齿距、前角、槽深以及槽底圆弧半径对切削过程的影响。结果表明：切屑变形系数随着齿升量增加而增加；切削力随着前角增大而减小，但减小速度逐渐平缓；切削温度随着齿升量、槽底圆弧半径增加而增加，但整体增量不大；切屑曲率半径随着刀具前角和槽底圆弧半径的增大而减小。
关键词：涡轮榫槽；拉刀设计；Incoloy 901；有限元仿真；切屑变形系数
中图分类号：TG715；TH162文献标志码：ADOI：10.3969/j.issn.1000-7008.2020.09.008
Simulation Optimization Design of Incoloy 901 Turbine Tongue and Groove Broach
Huang Xianghui，Ming Weiwei，An Qinglong，Xu Jinyang，Chen Ming
Abstract:Turbine tongue and groove，as the connecting part of the blade and the disk，have strict requirements on surface quality and geometric accuracy.The key element of tongue and groove forming broaching is the broach design.This paper studies the influence of geometrical parameters of broach on cutting force，chip shape and size by finite element simulation method.First，the broach geometry model is established by SolidWorks in equal proportions，and then the broaching simulation model is established by AdvantEdge software.Chip curvature radius and chip thickness are selected as standards for verification，and the error is within the acceptable range.Then，a simulation scheme is developed based on machining experience.The influence of rise per tooth，tooth pitch，rake angle，groove depth，and arc radius at the bottom of the groove on the cutting process are described.The results show that the chip deformation coefficient increases with the amount of rise per tooth.The cutting force decreases with the increase of the rake angle，but the decreasing speed gradually reduces.The cutting temperature increases with the amount of tooth lift and the arc radius of the groove bottom，but the overall increase is not large； the chip curvature radius decreases as the tool rake angle and tooth root arc radius increase.
Keywords:turbine tongue and groove；broach design；incoloy 901；finite element simulation；chip deformation coefficient