复杂面孔磨粒流精密抛光工艺数值分析-机械制造及其自动化专业论文.docxVIP

摘 要 由于传统加工方法会在工件表面留下不同程度的加工缺陷，磨粒流精密抛光作为 一种新型的抛光方法，能够对零件复杂型面进行精密研磨抛光、倒圆角，且在加工一 致性上，具有传统工艺无法比拟的优势，因而逐渐受到重视。 本文针对磨粒流抛光过程中各加工参数均会对抛光结果产生影响，且多参数耦合 后对加工质量影响不明确的问题。为探究磨粒流抛光加工过程中不同参数对工件表面 质量的影响规律，并深入揭示加工过程中的多参数相互作用机制，本文采用三维流体 动力学软件 Fluent，针对单向阀耦合件进行数值模拟分析，研究磨粒流抛光加工过程中 不同参数对表面加工质量的影响。同时，针对磨粒流抛光加工过程内、外部因素进行 了相应的协同控制分析，明确了磨粒粒径、磨粒体积分数、磨料速度与磨料粘度的对 应关系，并提出了抛光过程中磨粒粒径、磨粒体积分数、磨料速度与磨料粘度的最优 抛光策略。 关键词：磨粒流 抛光 单向阀 数值模拟 ABSTRACT Traditional processing methods may produce much manufacturing deficiency in various degrees. However, abrasive flow polishing, which is a new polishing method, could be capa ble of polishing precisely on complex surface or rounding and has a better process consistenc y than the traditional ones. Just because of these advantages, this excellent processing metho d received much attention in recent years. In abrasive flow machining process，any of the parameters would impact the polishing effects and the qualities of machining are undefined. In order to explore the influence factors of abrasive flow machining on surface machining qualities and uncover the mechanism of coupling effect with multi-parameters, CFD software, Fluent, has been adopted for simulating the machining process on one-way valve. The effect of machining parameters on machining process was numerically investigated in this paper. In addition, the inner-outer effect factors of abrasive flow machining have been analyzed in coupling. Then, the corresponding relation between particle diameter, particle volumetric fraction, abrasive velocity and abrasive viscosity has been pointed out. Furthermore, the optimal machining strategy of these effect factors has been put forward. Key Words: Abrasive Flow Polishing One-way valve Numerical Simulation 目 录 摘要 ABSTRACT 目 录 HYPERLINK \l _bookmark0 第一章 绪论 1 HYPERLINK \l _bookmark1 1.1 论文的研究背景和意义 1 HYPERLINK \l _bookmark2 1.2 磨粒流抛光技术概述 1 HYPERLINK \l _bookmark3 1.3 数值模拟理论 4 HYPERLINK \l _bookmark4 1.4 本文主要研究内容 7 HYPERLINK \l _bookmark5 1.5 本章小结