Offline preheating device for hot mill rollers

Abstract

The invention discloses an offline preheating device for hot mill rollers. The offline preheating device comprises a heating furnace, a base and two power devices. The power devices are arranged at the two opposite ends of the base correspondingly. The heating furnace is arranged between the two power devices and is in a gourd shape. The heating furnace is formed by oppositely combining an upper half furnace body and a lower half furnace body which are symmetric. An upper heating layer is arranged along the inner wall of the upper half furnace body, and a lower heating layer is arranged along the inner wall of the lower half furnace body. After the upper half furnace body and the lower half furnace body are combined oppositely to form the heating furnace, a heating layer is formed by the upper heating layer and the lower heating layer, and a heating cavity is defined by the heating layer. The heating cavity is divided into two cylindrical chambers which are arranged in parallel and communicate with each other. Bearings are arranged at the two ends of each chamber. The pair of rollers to be heated are placed in the two chambers correspondingly, after shaft shoulders at the two ends of the rollers are supported on the bearings, the power devices are used for driving the rollers to rotate synchronously in the preheating process. The offline preheating device is simple in structure, convenient to operate and even in roller heating, an ideal roller shape can be obtained, and therefore the titanium plate rolling plate shape is improved, and a use effect is good.

Description

technical field [0001] The invention belongs to the technical field of metal processing, and in particular relates to an off-line preheating device for rolls of a hot rolling mill. Background technique [0002] Titanium and titanium alloy plates have high deformation resistance and resilience in hot rolling, and it is difficult to control the rolling shape. Appropriate roll shape must be used to obtain a good shape, otherwise shape defects are prone to occur. Both the roll shape and thermal expansion of roll grinding affect the actual roll shape. The roll shape of the roll grinding is determined when the new roll is ground, and precise control can be achieved by controlling the parameters of the roll grinding. Since the roll is inevitably Expansion occurs when the temperature rises, so concave rolls are generally used for roll grinding. The influence of thermal expansion on the roll shape is more complicated. The roll preheating and the heat exchange between the roll and th...

AI Technical Summary

Problems solved by technology

In order to meet the actual production needs of diverse ideal roll shapes, titanium plate hot rolling manufacturers generally need to prepare multiple pairs of rolls with different grinding roll shapes. At the same time, before rolling finished products, they need to preheat the rolls through semi-finished hot rolling. The number of rolls is large, the effect of preheating rolls for semi-finished rolling is poor, and it is not conducive to organizing production, and the hot rolls for semi-finished rolling are very easy to damage the surface of the rolls, which in turn affects the rolling surface quality of finished titanium plates. And surface control is very unfavorable, the effect is not ideal, and urgently needs to be improved

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