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

轧辊表面应力和温度测量研究轧制边界现象

基本信息

批准号：
62550089
负责人：
HATAMURA Yotaro
金额：
$ 1.34万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1987
资助国家：
日本
起止时间：
1987 至 1988
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-62550089/
关键词：
Forming Rolling Pressure Friction Temperature Heat Flux Stress Sensor 測定温度センサ

项目摘要

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.

为了阐明轧制过程中边界表面的机械和热现象，使用作者开发的可检测作用在轧辊表面上的压力和摩擦应力的应力传感器和可检测表面温度和热通量的温度传感器来测量实际应力和温度。无论是带材轧制还是方坯轧制，从接触弧的入口到中性点，轧制方向上的摩擦应力几乎恒定。接触表面上的摩擦应力的方向与带材轧制中压力分布的梯度方向一致。在钢坯轧制中，在接触弧的后期，宽度方向的摩擦应力增大。这可能与三维金属沿宽度方向流动有关。表面温度和热通量是根据温度传感器测量的两个温度，采用一维非稳态热传导的逆向计算方法来计算的。该计算方法的准确性已得到证实。在带材轧制过程中，可以根据温度传感器测量的表面温度和热通量来估计沿接触弧产生的热量分布。因此，可以使用温度传感器来研究热机械现象。