摘要
高性能要求复杂曲面零件的精密加工,不但要保证一定的几何精度,更要满足其性能指标。此类零件性能与几何、物理等参量密切相关,因此最终精确尺寸和形状受几何、物理、性能等多源约束的影响,加工难度大,迫切需要按零件性能要求进行加工的新方法。从分析零件特征入手,将该类高性能要求复杂曲面零件称为多源约束面形再设计类复杂曲面零件。研究零件性能与多源约束的耦合关联模型,针对零件性能与多源约束的显式关联关系或隐式关联关系,建立几何量修正补偿性能偏差的补调机制,综合应用活动标架和曲面相伴理论,建立测量面、加工基准面、加工目标曲面的关联模型,最终提出保证零件性能要求的面形再设计原理与方法。在此基础上,提出多源约束面形再设计类复杂曲面零件'测量-再设计-数字加工'一体化加工策略,构建相应的技术体系,为实现该类零件的精密加工提供了一种新的理论与方法。
For the precision machining request of complicated surface parts with high performance, geometry accuracy is not the only constraint, but also the performance should be met. Performance of this kind of parts is closely related to the geometrical and physical parameters, so finally accurate size and shape are affected by multiple source constraints, such as geometry, physics, and performance. The manufacturing is difficult and new manufacturing method according to performance requirement is urgently needed. From characteristics analysis of the parts, this kind of complicated surfaceparts with high performance request can be called redesign class complicated surface parts with multiple source constraints. Coupling correlation model between performance and multiple source constraints is researched and in view of the explicit or implicit relationship, the adjustment mechanism that geometric compensates performance deviation is established. Then, integrating moving frame theory and surface associated theory, correlation model of measurable surface, processing datum surface and processing target surface is obtained and the method of surface redesign for guaranteeing performance request of parts are proposed. Based on this, measure-redesign-machining integration manufacturing strategy for redesign class complicated surface parts with multiple source constraints is put forward and the corresponding technical system is constructed, which provide the new theory and method for realizing the precision machining of such parts.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2013年第19期126-132,共7页
Journal of Mechanical Engineering
基金
国家自然科学基金重点(50835001)
国家自然科学基金青年科学基金(51205041)
中国博士后科学基金(2012M510798)
中央高校基本科研业务费专项资金资助项目
关键词
面形再设计
多源约束
曲面精密加工
测量加工一体化
Surface redesign Multiple source constraints Surface precision machining Measure-machining integration
