Measurements of friction in cold flat rolling
Measurements of friction in cold flat rolling
复制标题
冷轧平轧摩擦力的测量
DOI：
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发表时间：
1991
期刊：
影响因子：
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通讯作者：
J. Lenard
中科院分区：
文献类型：
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作者：
J. Lenard
研究了冷轧平整过程中压下量、轧制速度和材料性能对界面摩擦应力和辊缝法向应力变化的影响。结果证实了早期研究的结论，强调的摩擦系数的依赖性，因此，界面剪切应力，对工艺参数。初步的实验，使用矿物油与1%的油酸作为润滑剂，显示流体动力润滑的可能存在，至少在部分的接触area.The数据的有效性证实了由传感器测量的辊分离力，位于底部工作辊下，通过整合的接触弧上的测量辊压分布得到的比较。的比较被发现是有利的，这表明，尽管它的缺点，嵌入销技术提供了可靠的measurements. A经验关系，给出平均摩擦系数的密度，真实的接触面积，轧制速度，和正常的负载，开发。
The effect of reduction, rolling speed and material properties on the variation of interfacial frictional and normal stresses in the roll gap during cold flat rolling is studied. The results confirm the conclusions of earlier research, emphasizing the dependence of the coefficient of friction, and hence the interfacial shear stress, on the process parameters. Preliminary experiments, using mineral oil with 1% oleic acid as lubricant, show the possible existence of hydrodynamic lubrication, at least over part of the contact area.The validity of the data is substantiated by comparing the roll separating forces, measured by transducers located under the bottom workroll, to those obtained by integrating the measured roll pressure distribution over the arc of contact. The comparison is found to be favorable, indicating that in spite of its shortcomings, the embedded pin technique gives reliable measurements.An empirical relationship, giving the average coefficient of friction in terms of density, real contact area, rolling speed, and normal load, is developed.