车床自动送料机构的棒料振动变形分析
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摘要
针对车床自动送料机在正常工作时出现的棒料振动问题,以某型号送料机为研究对象,使用Ansys Workbench建立数值模型。解算模型得到棒料的模态以及谐响应特性,并完成对送料系统的流固耦合分析。结果表明:棒料弯曲变形程度随转速的增加而增大,随液压油粘度的增加而减小;棒料与送料导管之间存在最佳间隙,且间隙过大或者过小都会导致变形加大。
For bar vibration of lathe automatic feeding mechanism under the normal working condition,taking a certain type feeding mechanism as the research object,a numerical model is established by using Ansys Workbench. The modal and harmonic response characteristics of the bar are obtained,and the fluid-solid coupling analysis of the feeding system is completed. The results show that the bar bending deflection increases with the increase of the rotational speed and decreases with the increase of the hydraulic oil viscosity. There is an optimum clearance between the bar and the feeding guiding pipe,and the clearance is too large or too small to cause the deformation increase.
For bar vibration of lathe automatic feeding mechanism under the normal working condition,taking a certain type feeding mechanism as the research object,a numerical model is established by using Ansys Workbench. The modal and harmonic response characteristics of the bar are obtained,and the fluid-solid coupling analysis of the feeding system is completed. The results show that the bar bending deflection increases with the increase of the rotational speed and decreases with the increase of the hydraulic oil viscosity. There is an optimum clearance between the bar and the feeding guiding pipe,and the clearance is too large or too small to cause the deformation increase.
引文
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[4]孙自恺,权修华.冲压自动送料装置及其送料精度的探讨[J].重型机械,1990(03):31-35.
[5]陈国彦.铣削加工中心数字化样机开发与仿真研究[D].东北大学,2008.
[6]张直明.滑动轴承的流体动力润滑理论[M].北京:清华大学出版社,1999:1-3.
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