Development of a Finite Element (FE) based Model for the Prediction of the Width Spread of a Dog-Bone shaped Slab in Roughing Mill
- Development of a Finite Element (FE) based Model for the Prediction of the Width Spread of a Dog-Bone shaped Slab in Roughing Mill
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- Prediction of the width spread of slabs and strips is important technique in hot rolling.
A common practice in the roughing mill of hot rolling is to control the thickness and width of the slabs for the finishing mill. In the roughing mill, the dog-bone shape is formed at the edge of slab in the vertical rolling. And then a dog-bone shaped slab passes through the horizontal rolling.
The width spread of a dog-bone shaped slab in the horizontal rolling affects the final width and product quality. Therefore, it is essential to predict the width spread of a dog-bone shaped slab in roughing mill.
In this paper we present a model for the prediction of the width spread of a dog-bone shaped slab in roughing mill.
The prediction model is developed based on the extremum principle(upper bound theorem) for rigid plastic material and a three-dimensional admissible velocity field.
The prediction accuracy of the proposed model is examined through comparison with the predictions from the 3-D finite element (FE) simulations.
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