整体叶盘铣削数控编程与加工技术

整体叶盘有良好的结构完整性、轻质化、装配环节少、装配精度高等优点,已被广泛应用于航空发动机中。根据整体叶盘的切削加工特征,将其简化为整体叶盘基准件,从数控编程和加工技术两方面实现整体叶盘的高质量加工。首先,利用Hyper MILL软件对整体叶盘基准件进行数控编程,优化获得理想的刀具路径,保证高效高质量的零件加工。然后,利用DMU-70V五轴加工中心对钛合金TC4整体叶盘基准件进行切削加工,在整体叶盘基准件叶片和流道几何特征的精加工时,选用不同型号的立铣刀,并监测加工过程中的切削力。最后,对加工后叶片和流道加工表面形貌进行测试分析,并结合切削力对比分析国产刀具和进口刀具对钛合金整体叶盘的切削加工性能。

CNC Programming and Machining Technology for 5-Axis Milling of Turbine Blisk

Turbine blisk has been widely applied in aero-engine due to its many advantages such as good structural integrity,light weight,less assembling link and high assembling precision.Based on the machining characteristics of the turbine blisk,it is simplified as a benchmark workpiece which can be investigated from two aspects of CNC programming and cutting operation.Firstly,CNC programming of the benchmark workpiece was conducted with HyperMILL software.The ideal tool path were obtained,which can be ensured high efficient and high quality machining of the workpiece.Then,the benchmark workpiece material used TC4 titanium alloy which was milled with DMU-70V five-axis machining center.During the finishing of the blades and the hub surfaces,the cutting forces were on-line measured for different end millingtools.Finally,the surface morphology of the blades and hub machined surfaces were observed.The machining performance of the different milling tools for the benchmark workpiece of TC4 titanium alloy is evaluated with the measured cutting forces and surface morphology.