文章摘要
王立梅.砂轮振动对磨削区时变润滑效应的影响[J].润滑与密封,2018,43(3):56-61
砂轮振动对磨削区时变润滑效应的影响
Effect of Wheel Vibration on Transient Lubrication in Grinding Area
  
DOI:10.3969/j.issn.0254-0150.2018.03.009
中文关键词: 砂轮振动  时变效应  磨削  砂轮速度
英文关键词: grinding wheel vibration  time varying effect  grinding  wheel speed
基金项目:国家自然科学基金项目(51575289);山东省自然科学基金项目(2016ZRB01AJX).
作者单位E-mail
王立梅 青岛理工大学机械工程学院 wanglmqing@163.com 
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中文摘要:
      为研究砂轮振动对磨削区压力、膜厚及温度的影响,建立考虑时变效应的砂轮振动磨削的润滑模型,分析陶瓷结合剂CBN砂轮磨削45#钢的过程中的最大压力、最小膜厚和最大温度随振动的幅值、频率及砂轮速度的变化情况。结果表明:考虑砂轮振动的时变效应时,不同瞬时下的压力及膜厚变化较大;随砂轮振幅和频率的增大,当砂轮振动到最低点时最大压力及最大温度增大,最小膜厚减小,而振动到最高点时则相反;时变效应使最大压力、最小膜厚与最大温度出现了滞后现象;当砂轮速度增大时,最大压力减小、最小膜厚增大,这有利于润滑且能减少磨粒磨损,但是最大温度增大容易产生磨削烧伤和热变形,影响工件磨削后的表面质量,所以应据此选择合适的砂轮速度。
英文摘要:
      In order to study the effect of grinding wheel vibration on the grinding zone pressure,film thickness and temperature,the lubrication model of grinding wheel vibration grinding consider the time varying effect of wheel vibration was established.The variation of the maximum pressure,the minimum film thickness and the maximum temperature with the vibration amplitude and vibration frequency of the grinding wheel and the wheel speed were analyzed in the process of ceramic bonded CBN grinding wheel grinding 45 steel.It is concluded that when consider the time varying effect of wheel vibration,the pressure and film thickness under different instantaneous vary greatly.When the grinding wheel vibration reaches the lowest point,the maximum pressure and the maximum temperature are increased and the minimum film thickness is decreased,and they are opposite when the grinding wheel vibration reaches the highest point.The time varying effect causes the hysteresis phenomenon of the maximum pressure,the minimum film thickness and the maximum temperature.With the increasing of the grinding wheel speed,the maximum pressure is decreased and the minimum film thickness is increased,which is beneficial to the lubrication can reduce the abrasive wear.However,the increase of the maximum temperature easily results in the grinding burn and thermal deformation of the samples,and influenced the surface quality of the samples after grinding.So the appropriate wheel speed should be chosen.
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