磨粒流动力光整加工接触区域压力研究  

Study on Hydrodynamic Pressure of Contact Zone on Abrasive Flow Dynamical Finishing Machining

作　　者：王婷婷[1] 安鲁陵[1] 庄曙东[1] 付睿[1] 

机构地区：[1]南京航空航天大学机电学院

出　　处：《航空制造技术》2013年第19期88-92,97,共6页Aeronautical Manufacturing Technology

基　　金：南京航空航天大学基本科研业务费专项科研项目(NS1010140)资助

摘　　要：本文介绍了磨粒流动力光整加工的原理,基于Navier-Stokes方程和流体流动连续性方程,建立了磨粒流动力光整加工中硬质合金棒与工件楔形接触区流体动压力的三维模型;应用Matlab对接触区三维流体动压力进行求解,结果表明:流体动压力随硬质合金棒转速和磨粒流动力粘度的增大而增大,随硬质合金棒与工件之间间隙的增大而减小。压力峰值发生在最小间隙区域,当间隙逐渐变大时,峰值区域逐渐前移并且变宽。在硬质合金棒浸入磨粒流深度方向,除边缘处有侧泄外,流体动压力相同。The principle of abrasive flow dy-namical finishing machining is introduced, and the three-dimensional hydrodynamic pressure model of wedge-like zone between cemented carbide cylinder and workpiece is established based on Navier-Stoke and continuity equation. The solution of three-dimensional hydrodynamic pressure shows that the hydrodynamic pressure is directly propor-tional to the velocity of cemented carbide cylinder and the dynamic viscosity of abrasive lfow and inversely propor-tional to the minimum clearance between the cemented carbide cylinder and workpiece. And the peak pressure is generated just in the minimum clearance region. When the minimum clearance becomes bigger gradually, the peak pressure region is gradually wider and moving forward. It can also be concluded that the pressure distribution is uni-form in the direction of depth of cemented carbide robust which immerse in the abrasive lfow.

关 键 词：硬质合金棒 楔形接触区 流体动压力 数学模型 

分 类 号：V261.93[航空宇航科学与技术—航空宇航制造工程]