平底刀底面加工叶片进排气边  

Machining the Leading and Trailing Surface of Turbine Blades by the Bottom of the Flat-End Cutter

作　　者：张春[1] 宁涛[1] 沈云超[1] 陈志同[1] 

机构地区：[1]北京航空航天大学机械工程及自动化学院,北京100191

出　　处：《图学学报》2015年第6期834-839,共6页Journal of Graphics

基　　金：国家重大科技专项(2013ZX040111031)

摘　　要：平底刀加工叶片进排气边的传统方法以刀具侧刃切削工件,由于叶片进排气边处曲面沿着截型线切线方向曲率半径较小,当走刀方向沿着截型线切向时,加工带宽较小。对影响凸曲面加工带宽的因素进行研究发现,使用平底刀底面进行切削可以提高叶片进排气边处加工带宽,由此提出了用平底刀底面加工进排气边的刀具定位方法,通过优化两个刀具定位参数使加工带宽达到最大。以某航空发动机叶片进排气边为例进行仿真加工,结果表明该方法可有效增大叶片进排气边处的加工带宽。Traditional method of machining leading and trailing edge surface of turbine blades with a flat-end cutter is to use the side edge of the cutter to cut the workpiece, by which the strip width will be very narrow when the cutter traces along the tangential direction of blade cross-section curve, because the cross-section curve′s curvature radius of leading and trailing edge surface is too small. By studying on the factors influencing the machining strip width of convex surfaces, it was found that the strip width will be wider if the bottom of flat-end cutter is used. A new flat-end cutter positioning method using the bottom of the flat-end cutter to cut the leading and trailing edge surface is proposed to maximize the strip width by optimizing the two cutter positioning parameters. Machining simulation experiment on an aero-engine demonstrates the feasibility of this method in increasing the strip width of leading and trailing edge surface.

关 键 词：平底刀 叶片进排气边 刀具底面 加工带宽 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]