• CN：11-2187/TH
  • ISSN：0577-6686
机械工程学报

›› 2014, Vol. 50 ›› Issue (9): 161-168.

• 论文 • 上一篇    下一篇

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软性磨粒流加工特性及近壁区域微切削机理

李琛;计时鸣;谭大鹏;刘曦泽   

  1. 中国计量学院质量与安全工程学院；浙江工业大学特种装备制造与先进加工技术教育部重点实验室
  • 出版日期:2014-05-05 发布日期:2014-05-05

Study of Near Wall Area Micro-cutting Mechanism and Finishing Characteristics for Softness Abrasive Flow Finishing

LI Chen,;JI Shiming,;TAN Dapeng,;LIU Xize   

  1. Department of Quality and Safety Engineering, China Jiliang University; Key Laboratory of Special Purpose Equipment and Advanced Manufacturing Technology of Ministry of Education, Zhejiang University of Technology
  • Online:2014-05-05 Published:2014-05-05

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摘要： 软性磨粒流加工是一种能够有效解决模具结构化表面光整加工的新方法。基于软性磨粒流光整加工的特点，对软性磨粒流中颗粒对壁面的微切削机理进行研究。以普林斯顿方程为基础，对固体相颗粒在流体中的受力进行分析，进而分析颗粒对壁面的微切削机理。通过对汽车模具中的典型结构化表面进行结构简化，得到用于数值模拟及加工试验的流道的物理模型，采用可实现k-ε湍流模型对软性磨粒流在流道中的压力、速度流场的分布进行数值分析；搭建软性磨粒流加工试验平台并进行20 h加工试验，加工结果证明微切削机理分析的正确性，试验对比结果证明软性磨粒流加工方法可以实现细微尺寸结构化表面的光整加工，有效提高加工的精度。

关键词: 软性磨粒流;受力分析;微切削机理;可实现k-ε湍流模型

Abstract: Softness abrasive flow (SAF) machining is a novel finishing method for mold structural surface. Based on the characteristics of SAF machining, the micro-cutting mechanism of particles to surface has been analyzed. Force analysis for the solid phase which flowed with SAF is carried out based on the Preston equation, and then, the micro-cutting mechanism of particles to surface has been analyzed. Typical structural surface of motor mold has been simplified, and the physical model used to numerical analyzing and finishing is obtained, and realizable k-ε model is used for numerical analyzing pressure and velocity distribution of SAF flow field. SAF experimental platform is constructed, the validity of micro-cutting mechanism analyzing is proved, and experiment results show that SAF can improve surface accuracy of tiny scale mould structural surface effectively.

Key words: softness abrasive flow;FORCE analysis;micro-cutting mechanism;realizable k-ε model

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