凸轮磨削力变化规律研究

Research on the Law of the Cam Grinding Force

为了减小凸轮的轮廓误差,以便高效、高精度地提高凸轮的轮廓廓形精度,分析了凸轮轮廓的廓形特点;基于平面磨削的理论知识,根据凸轮轮廓的特征,研究了凸轮磨削力和凸轮曲率半径的关系,进而得到磨削力随着凸轮升程变化的规律,建立了凸轮磨削力和发动机升程之间的数学模型;以直动平底从动件盘形凸轮为例,通过MATLAB软件仿真验证了所建立凸轮磨削力模型的正确性,并将研究结果和实际磨削加工测得的数据进行了对比,得到凸轮磨削力的变化趋势与计算模型的变化趋势相一致,为凸轮的X-C联动磨削加工过程控制研究提供了理论依据和新思路。

In order to improve the contour accuracy of cam,researches the law of the cam grinding force, and it is the aim to deduce the error of cam contour. Based on plane grinding theory knowledge, according to the features of cam profile, the relationship between the grinding force and curvature radius of cam is studied. The factor which affects the cam grinding force is curvature radius and the engine lift. The mathematical model of cam grinding force is established. With straight moving flatbottomed follower cam as an example, the simulation curve of the cam grinding force is obtained by the MATLAB. The simulation result is that the trend of cam grinding force is consistent with the trend of curvature radius. At last, the cam grinding force model is verified in the actual grinding machine. The model can be a theory basement to control the precision position of X-C axis.