表面技术Issue(7)：131-136,6.DOI:10.16490/j.cnki.issn.1001-3660.2015.07.024
超声振动珩磨表面残余应力数值模拟研究
Simulation Research on the Surface Residual Stress of Ultrasonic Vibration Honing
摘要
Abstract
ABSTRACT:Objective To study the influence on residual stress as the grinding residual stress has important influence on work-piece surface characteristics and ultrasonic vibration honing makes the grains obtain a great acceleration which changes the material removal mechanism. Methods The residual stress finite element theory was analyzed, the coupled thermal-mechanical finite ele-ment model was established for the ultrasonic vibration honing of a single CBN grain cutting 40CrNiMoA based on the thermal elas-tic-plastic theory. Steps of two cutting processes, unloading, constraint transformation and the cooling analysis were set. The sur-face residual stress distribution was obtained by numerical simulation under different vibration parameters and the simulation results were analyzed. Results The stress distribution at each analytical step was different, the ultrasonic vibration met the requirements of the simulation experiment. The honing force decreased by about 26% and the honing heat decreased by about 17% when applying ultrasonic vibration, the tangential residual stress was reduced, and the residual stress at vertical grinding direction was also re-duced and changed from the tensile stress to the compressive stress. Conclusion Ultrasonic vibration decreases the honing force and the honing heat which changes the distribution of residual stress and numerical values. The vibration frequency near 20 kHz has lit-tle influence on residual stress. The tangential compressive residual stress increases and the honing tensile residual stress at the vertical direction decreases with the decreased honing speed. The tangential residual stress decreases and the residual stress at the vertical direction increases with the increased amplitude.关键词
超声振动/珩磨/热力耦合/珩磨力/珩磨热/残余应力Key words
ultrasonic vibration/honing/thermal-mechanical couple/honing force/honing heat/residual stress分类
矿业与冶金引用本文复制引用
郑华林,张伟..超声振动珩磨表面残余应力数值模拟研究[J].表面技术,2015,(7):131-136,6.基金项目
四川省教育厅自然科学基金重点项目(13ZA0178) Fund：Supported by the Education Department of Sichuan Province Natural Science Foundation of Key Project(13ZA0178) （13ZA0178）
