叶片微织构数控加工无干涉刀轴生成方法研究  

Research on Generation Method of Collision-Free Tool Orientation for Numerical Control Machining of Blade Micro-Texture

作　　者：魏盼 张臣[1] 宋云 徐琰 WEI Pan;ZHANG Chen;SONG Yun;XU Yan(College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;AVIC Helicopter Design Institute,Jingdezhen 333000,China)

机构地区：[1]南京航空航天大学机电学院,南京210016 [2]中国直升机设计研究所,景德镇333000

出　　处：《航空制造技术》2019年第22期88-94,101,共8页Aeronautical Manufacturing Technology

基　　金：江苏省自然科学基金（BK20171415）;国家自然科学基金（51675277）;江苏省六大人才高峰项目（GDZB-011）

摘　　要：随着仿生表面工程技术的发展,微织构减阻、耐磨等众多优良的表面性能被越来越多的研究证实,但其应用推广却一直受到复杂低效的制造技术的限制。数控加工作为一种高效自动化的加工手段,能有效解决零件形状复杂、精度要求高等问题。针对叶片微织构的数控加工技术,提出了一种无干涉刀轴生成方法。该方法首先通过提取微织构模型引导线或偏置微织构表面求交线获得刀具路径曲线;然后在刀具路径曲线上每个刀心点处,根据一定规则建立局部坐标系和参考平面;紧接着在参考平面内根据叶片干涉情况、机床旋转轴行程以及刀具参数信息求解出该刀心点处的刀轴可摆动区域;最后根据最安全原则生成无干涉的刀轴矢量。以一叶轮叶片为案例,利用NX Open C++二次开发技术结合VERICUT仿真,成功验证了无干涉刀轴生成方法的正确性,为叶片微织构的高效数控加工提供了技术方法支撑。As the development of bionic surface engineering technology, many excellent surface properties of micro-texture surface have been confirmed by more and more research, such as drag reduction and wear resistance. But its application and promotion have been limited by complex and inefficient manufacturing techniques. As an efficient and automatic processing method, CNC machining can effectively adapt to the processing of complex shape parts and meet the requirements of high precision. Aiming at the numerical control machining technology of blade micro-texture, a collisionfree tool axis generation method is proposed. The method first obtains a tool path curve by extracting a micro-texture model guide line or intersection line of offset surface of micro-texture surface and smooth blade surface. Then, at each tool point on the tool path curve, a local coordinate system and a reference plane are established according to certain rules. Next, in the reference plane, the oscillating region of the tool axis at the tool point is solved according to the blade interference condition, the machine rotation axis travel and tool parameters. Finally, the collision-free tool axis vector is generated according to the safest principle. Taking an impeller blade as an example, the NXOpen C++ secondary development technology and VERICUT simulation successfully verified the correctness of the collision-free tool axis generation method, and it provides technical support for the high-efficiency CNC machining of the blade micro-texture.

关 键 词：叶片微织构 刀轴矢量 干涉碰撞 NXOpen C++二次开发 数控加工 

分 类 号：TG6[金属学及工艺—金属切削加工及机床]