机车发动机用凸轮轴磨削新工艺

The New Grinding Process for Camshaft in Locomotive Engine

针对机车发动机用凸轮轴几何特征,分析了传统磨削工艺中磨削全程使用一种型号的砂轮对凸轮轮廓的凹弧段进行加工的难点和弊端,提出了大小砂轮配合磨削凸轮轴的新工艺。实施过程中为了保证大砂轮避开凸轮轮廓的凹弧段且加工过程无振动冲击,完成了凸轮凹弧段轮廓重构以及砂轮架速度优化。磨削实验结果表明,采用该新工艺能提高凸轮轴磨削的精度和效率,具有很高的可行性。

According to the geometric characteristics of camshaft in locomotive engine, this paper analyzed the difficulties and disadvantages of traditional grinding process that the concave arc of cam is machined by single type grinding wheel, thus a new grinding process that camshaft is machined by large size and small size grinding wheels was proposed. To avoid the concave arc when machining by large size grinding wheel and guarantee no vibration and impact, the reconstruction of concave arc and optimization of grinding carriage velocity were completed. The experimental results of grinding show that grinding accuracy and efficiency were improved by this new process, which demonstrates its feasibility.