一种叶片截面线光顺及等距面生成方法  

Method of Cross-Sectional Curve Fairing and Generation of Equidistant Offset Surface for Blade Surface

作　　者：单晨伟[1] 廖恺[1] 成宏军[1] 胡海滨[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

出　　处：《航空制造技术》2015年第1期115-118,共4页Aeronautical Manufacturing Technology

摘　　要：采用等距面生成球头刀加工刀具轨迹是曲面加工中一种常用的方法。但是,在对叶身曲面进行等距偏置时,经常出现无法偏置的问题。针对该问题,分析了曲面偏置自相交原因,并根据叶片类零件叶身曲面的特点,提出了一种叶身截面线光顺及等距面生成方法。该方法首先采用Kjellander方法将原始截面线进行自动光顺,然后根据光顺后的原始截面线和数据采样法构造偏置截面线,最后通过截面线放样法构造叶身曲面等距面。实例表明,采用Kjellander方法可以实现叶片曲面的自动光顺和叶片曲面等距面的构造。The using of equidistant offset surface to generate cutter path of bail-end milling is a common way in surface machining, however, in the equidistant offset process of blade surfaces, it＇s hard to get offset surface. For this issue, the reason of self-intersecting is investigated, and the method of cross-sectional curve fairing of blade and equidistant offset surface generation is presented based on the characteristics of blade surfaces. First, primeval cross-sectional curves gets automatically fairing through Kjellander＇s method of fairing. Second, offsett cross-sectional curves are structured on the basis of primeval cross-sectional curves after fairing and data sampling method. Finally, the equidistant offset surface can be constructed through all the offset cross-sectional curves by lofting. The example indicates that using Kjellander＇s method of fairing can fair automatically blade surface and structure the equidistant offset surface.

关 键 词：叶片 截面线 等距面 光顺 

分 类 号：TG659[金属学及工艺—金属切削加工及机床]