砂轮/工件楔形区流体动压力的建模与实验验证  

Hydrodynamic Pressure Modeling and Experimental Verification of Wedge-Like Zone Between the Wheel and Workpiece

作　　者：张强[1] 李长河[1] 王胜[1] 

机构地区：[1]青岛理工大学机械工程学院,山东青岛266033

出　　处：《机械设计与制造》2013年第12期60-62,66,共4页Machinery Design & Manufacture

基　　金：国家自然科学基金资助项目(51175276)

摘　　要：基于Navier-Stokes方程和流体流动的连续性方程,建立了浇注式供液方式下,考虑砂轮、工件表面粗糙度的砂轮/工件楔形区流体动压力数学模型。在平面磨床上进行了流体动压力的实验研究,结果表明,实验中测量的动压力值与相同条件下模型理论值基本吻合,理论模型可很好地预测粗糙表面间楔形区压力场的分布;考虑粗糙度的楔形区流体动压力的理论曲线是不光滑的;楔形区流体动压力随着砂轮速度的增加、最小间隙的减小而增大,最大压力峰值分布在砂轮、工件最小间隙区域,且在该区域压力梯度变化明显。Considering roughness of the wheel and workpiece, the hydrodynamic pressure model of wedge-like zone with flood delivery was established based on Navier-Stokes and continuity equations. Experimental study of the hydrodynamic pressure was conducted on the surface grinder, and the experimental results show that the experiment measured pressure values are consistent with the theoretical values of the model under the same conditions, and the model can well forecast hydrodynamic pressure distribution at wedge-like zone between rough surfaces. The theoretical curve of the hydrodynamic pressure of the wedge-like zone between rough surfaces is not smooth. The hydrodynamic pressure of the wedge-like zone is increased with the increase of the wheel speed and the reduction of the minimum gap and the peo~ pressure is generated just in the minimum clearance region in which the higher pressure gradient occurs.

关 键 词：磨削 楔形区 浇注式供液 流体动压力 粗糙表面 层流 

分 类 号：TH16[机械工程—机械制造及自动化] TG743[金属学及工艺—刀具与模具]