Pressure Distribution, Roll Force and Torque in Cold Ring Rolling
Pressure Distribution, Roll Force and Torque in Cold Ring Rolling
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DOI：
10.1243/jmes_jour_1976_018_033_02
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发表时间：
1976-08
期刊：
影响因子：
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通讯作者：
A. Mamalis;W. Johnson;J. Hawkyard
中科院分区：
文献类型：
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作者：
A. Mamalis;W. Johnson;J. Hawkyard
采用销钉式压力传感器技术，准确测量了平环和异形环件轧制过程中的法向压力分布、轧制力和扭矩。在平面应变滑移线场解的基础上，建立了一个简单的平面应变滑移线场模型，用于估算异型环的轧制力和扭矩。通过推导合力和杠杆臂，还可以预测驱动扭矩。结果表明，与传统的带钢轧制相比，环件轧制的法向压力分布在入口面后不久出现提前峰值，传统的摩擦山理论已不适用。认识到辊缝和其他地方在几何形状上的明显差异，平轧分析似乎一般不适合环件轧制。
Normal pressure distribution, roll force and torque are measured accurately when rolling plain and profiled rings by using the pin-type pressure-transducer technique. A simple theoretical model, based on the plane strain slip-line field solution for the indentation of a block by opposed flat indenters, is developed to provide an estimate of roll force and torque for profiled rings. The driving torque is also predicted by deriving the resultant force and the lever arm. Examination of the results indicates that, in contrast to conventional strip rolling, the normal pressure distribution in ring rolling shows an early peak soon after the entry plane and that conventional friction-hill theory appears inapplicable. Recognizing the appreciable differences in geometry in the roll gap and elsewhere, flat rolling analysis seems generally inappropriate to ring rolling.