开式整体叶盘四坐标高效开槽插铣工艺方法  

Process for 4-axis High Efficiency Slot Plunge Milling of Open Blisk

作　　者：任军学[1] 姜振南[1] 姚倡锋[1] 田荣鑫[1] 田卫军[1] 

机构地区：[1]西北工业大学现代设计与集成制造技术教育部重点实验室,陕西西安710072

出　　处：《航空学报》2008年第6期1692-1698,共7页Acta Aeronautica et Astronautica Sinica

基　　金：国家科技支撑计划(2008BAF32B00);航空科学基金(2007ZE53)

摘　　要：整体叶盘的加工余量主要是在其通道开槽粗加工阶段去除的,提高通道开槽切削效率是实现叶盘高效加工的关键。根据开式整体叶盘通道的结构特点,提出了四坐标插铣开槽高效低成本粗加工方法。通过叶盘叶片偏置面的直纹包络面逼近,确定叶盘通道粗加工区域,给出了四坐标插铣刀位轨迹生成算法。该方法有效解决了直纹面逼近的曲面边界问题,并通过对叶片偏置面的直纹逼近从根本上避免了刀位轨迹计算时误差的产生。实验表明,与传统的侧铣开槽粗加工相比,采用四坐标插铣方式切削力可降低60%,粗加工效率可提高1倍以上。Much of the amount of machining allowance for a blisk is removed in the rough milling,so improving the cutting efficiency of the tunnel rough machining is key to realizing high efficiency machining of blisks. According to the structure characteristics of the tunnel of an open blisk,a 4-axis plunge rough milling with high efficiency and low cost is studied. The rough milling region of the open blisk tunnel is determined by generating the ruled envelope surface of the blade＇s offset surface,and the algorithm of tool paths for 4-axis plunge milling is given. By using a ruled surface to approach a freedom surface,the problem of getting the boundary is solved,and the error arising from tool paths＇ computation is avoided by the algorithm. Experiment shows that the 4-axis plunge milling can reduce the cutting force by 60% and improve rough machining by more than 100%.

关 键 词：开式整体叶盘 插铣 通道粗加工 直纹包络面 刀位轨迹 

分 类 号：V261[航空宇航科学与技术—航空宇航制造工程]