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Numerical Simulation on Interfacial Creep Generation for Shrink-fitted Bimetallic Roll

机译：收缩拟合双金属辊界面蠕变产生的数值模拟

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摘要

The bimetallic work rolls are widely used in the roughing stands of hot rolling stand mills. The rolls are classified into two types; one is a single-solid type, and the other is a shrink-fitted assembled type consisting of a sleeve and a shaft. Regarding the assembled rolls, the interfacial creep sometimes appears between the shaft and the shrink-fitted sleeve. This interfacial creep means the relative displacement on the interface between the sleeve and the shaft. This creep phenomenon often causes damage to the roll such as shaft breakage due to fretting cracks. Although to clarify this creep mechanism is an important issue, experimental simulation is very difficult to be conducted. Since few studies are available, in this paper, the interfacial creep phenomenon is simulated by using the elastic finite element method (FEM) analysis. Here, the roll rotation is replaced by the road shift on the fixed roll surface. It is found that the interface creep can be explained as the accumulation of the relative circumferential displacement along the interface.
机译：双金属工作辊广泛用于热轧机架轧机的粗轧机架中。这些卷分为两种类型：一种是单固体类型，另一种是由套筒和轴组成的热缩装配类型。对于组装后的辊，有时会在轴和热缩套之间出现界面蠕变。这种界面蠕变意味着在套筒和轴之间的界面上的相对位移。这种蠕变现象通常会导致轧辊损坏，例如由于微动裂纹导致的轴断裂。尽管弄清这种蠕变机理是一个重要的问题，但很难进行实验模拟。由于很少有研究，本文采用弹性有限元方法（FEM）分析来模拟界面蠕变现象。在此，侧倾旋转被固定侧倾表面上的换挡代替。可以发现，界面蠕变可以解释为沿界面的相对圆周位移的累积。

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