凸轮轴偏心的测量与修正方法研究

摘要

A practical harmonic analysis technology and its application in the correction of main journal eccentricity of camshaft ends was proposed,a calculation model of camshaft eccentric distance and eccentric angle was established based on the main journal eccentricity of camshaft ends and the algorithm was analyzed,which would reduce system errors caused by the disunity between measurement datum and design datum of camshaft,and the deflection of the camshaft itself and avoid interpolation errors of traditional eccentricity correction algorithm.Experimental platform for measuring camshaft was built,measured data was corrected according to the proposed eccentricity correction algorithm.Experimental results demonstrate the proposed algorithm can correct eccentricity of main journal eccentricity of camshaft ends and camshaft itself effectively,the accuracy of instrument is improved.%将实用谐波分析技术应用于凸轮轴两端主轴颈偏心修正中,建立了基于凸轮轴两端主轴颈的各凸轮偏心距和偏心角的计算模型并对其算法进行了分析,通过偏心修正减小了凸轮轴测量基准和设计基准不统一以及凸轮轴自身弯曲带来的系统误差,避免了传统修正偏心算法中的插值误差。搭建了测量凸轮轴的实验平台,对主轴颈和凸轮的实测数据进行了偏心修正。实验结果表明,该方法对主轴径和凸轮偏心量的修正效果明显,提高了仪器的测量精度。