预缩机挤压区域橡胶毯径向长度模型

橡毯机械预缩过程中，相互作用的两圆柱辊的特殊结构，使得挤压区域橡胶毯在挤压时的径向长度难以确定，从而给预缩率的在线估计造成了一定困难。为解决这一问题，通过分析橡胶毯受挤压的变形过程，在对该过程作出一定简化的基础上，根据赫兹接触理论，建立了挤压区域橡胶毯在受挤压时的径向长度的数学模型。实例结果表明，根据模型计算出的变形时径向长度与实际值相对误差均在4%以内，平均绝对百分比误差为2%左右，模型是有效的，为实际生产中实现预缩率的在线估计提供了理论参考。

Model of radial length of rubber blanket in extrusion area for preshrinking machine

It is difficult to determine the radial length of extrusion area for rubber blanket pre-shrinking machine when preshrinking for special construction of two interactional cylindrical rollers. It causes some difficulties to online estimation of shrinkage. Analyzing deformation process of rubber blanket when it is extruded and making some simplifications, a mathematical model of radial length of rubber blanket in extrusion area when extruding was established to solve the problem according to Hertz contact theory. The result of application indicates that the relative errors of radial length calculated by the model are all less than 4%, and the mean absolute percentage error is about 2%. The model is efficient. It provides theory reference for online estimation of shrinkage in practical production.