基于非均匀余量的超薄叶片叶轮工艺优化策略  

Machining Process Optimization Strategy of Ultra-Thin Blade Impeller Based on Non-Uniform Machining Allowance

作　　者：吴雁[1] 吕博鑫[1] 郑刚[1] 赵涛涛 

机构地区：[1]上海应用技术学院机械工程学院,上海201418

出　　处：《机械设计与制造》2017年第10期224-227,232,共5页Machinery Design & Manufacture

基　　金：国家自然科学基金(51405304);上海市教委科技创新项目(14YZ143)

摘　　要：针对超薄结构叶片整体叶轮在制造过程中产生的较大切削变形,分析了薄壁叶片在集中载荷下的变形规律,应用了非均匀余量的工艺优化方案。依据优化后的工艺基于NX对实际生产中的轴流式整体叶轮进行了刀具轨迹规划并进行加工试验,检测得到最大误差优化率为59.87%,平均误差优化率51.81%,显示该策略能有效减小超薄叶片的铣削变形,尤其对叶片前缘和尾缘刚性较差部分的加工误差优化效果明显,对具有类似结构叶片的复杂曲面整体叶轮零件的加工具有一定的指导意义,对前缘和尾缘突出的异形叶片也尤为适合。Large deformation is an important problem in the process of manufacturing ultrathin blade of integral impeller. Thus a non-uniform allowance process is used in this paper, which can reduce blade deformation and improve processing quality. Firstly, the influence of concentrated load both on the deformation of thin-walled structure and thickened structure wad is analyzed. Secondly, the non-uniform allowance machining process of impeller blade was designed. Lastly, toot path was planned and processing experiment was done on the impeller. Measurement results show the ma~ error optimization rate is 59.87% and the average error optimization rate is 51.81%. Results show that the process optimization strategy can effectively reduce milling deformation of ultra-thin blade, especially on the less rigid parts, such as leading and trailing edges, where the effect of optimization is obvious. This paper is of significance to the actual production.

关 键 词：切削变形 整体叶轮 复杂曲面 工艺优化策略 超薄叶片 

分 类 号：TH16[机械工程—机械制造及自动化] TH161.1