摘要
基于有限元和Matlab分析方法,建立重构曲轴磨轨迹的数学模型。基于该模型,计算主轴颈的直径、圆度以及圆跳动,分析影响主轴颈磨削精度的因素,从而实现曲轴磨削精度的准确控制。理论分析表明,重力对曲轴的加工精度影响很小,顶尖压力主要影响曲轴的圆跳动,中心支架压力主要影响曲轴的直径,重力、中心支架压力与顶尖压力不影响曲轴圆度的加工精度。最后通过曲轴磨削实验验证了曲轴磨削轨迹模型和理论分析的正确性。
This paper proposes a method to reconstruct the grinding trajectory based on FEM and Matlab. The diameter, roundness and runout of the main journal are calculated and the factors which affect the crankshaft grinding precision are analysed in order to achieve accurate control of the crankshaft grinding precision. The theoretical result shows that the gravity has slight effect on the crankshaft machining precision; the center pressure mainly affects the crankshaft runout; the workrest pressure mainly affects the diameter of the crankshaft. The gravity, the workrest pressure and the center pressure don＇t affect the machining precision of the crankshaft roundness. The model and the theoretical result are validated by the experiment of crankshaft grinding process.
出处
《机械设计与研究》
CSCD
北大核心
2014年第2期99-103,共5页
Machine Design And Research
基金
汽车发动机制造精度控制的"两微米"工程(课题编号:2012BAF06B03)
关键词
曲轴磨削
轨迹重构
精度控制
crankshaft grinding
trajectory reconstruction
precision control
