Study on the Boundary Phenomena in Rolling by the Measurement of Stress and Temperature on a Roll Surface

为了阐明轧制过程中边界面上的力学和热现象，用作者研制的既能检测轧辊表面压力又能检测摩擦应力的应力传感器和能检测轧辊表面温度和热流的温度传感器，测量了实际的应力和温度。接触弧，无论是在板带轧制和钢坯轧制。接触面上的摩擦应力方向与轧制过程中的压力分布梯度方向一致。在钢坯轧制过程中，宽度方向上的摩擦应力在接触弧的后段增大。这可能与金属在宽度方向上的三维流动有关，由温度传感器测得的两个温度，采用一维非稳态导热的反算方法，计算出表面温度和热流密度。这种计算方法的准确性已得到证实。根据温度传感器测量的带钢表面温度和热流量，可以估计带钢轧制过程中沿接触弧沿着方向的生热分布。因此，可以使用温度传感器来研究热机械现象。

In order to elucidate mechanical and thermal phenomena on the boundary surface in rolling, actual stress and temperature have been measured using a stress sensor which can detect both pressure and frictional stress acting on a roll surface and using a temperature sensor which can detect surface temperature and heat flux developed by the authors.Frictional stress in the rolling direction is almost constant from the entrance to the neutral point in the contacting arc, both in strip rolling and billet rolling. The directions of the frictional stresses on the contacting surface agree with the directions of the gradients of pressure distribution in strip rolling. In billet rolling, frictional stress in the width direction increases in the later part of the contacting arc. This may be related with the three dimensional metal flow into the width direction.Surface temperature and heat flux are calculated from the two temperatures measured by the temperature sensor using the reverse calculation method for one-dimensional unsteady thermal conduction. Accuracy of this calculation method has been confirmed. Distribution of the heat generation along the contacting arc can be estimated in strip rolling from the surface temperature and heat flux measured by the temperature sensor. Therefore thermal mechanical phenomena can be investigated using the temperature sensor.