Rolling method capable of improving biting condition in rolling process of reversible rolling mill

Abstract

The invention discloses a rolling method capable of improving a biting condition in a rolling process of a reversible rolling mill. The rolling method comprises the following steps of (1) setting rolling reduction in a pass and a corresponding roll clearance set value according to a pre-rolling thickness of a steel plate in the rolling pass and the post-rolling thickness required by a technology, and calculating the estimated length of the steel plate after the rolling pass is completed; (2) setting the rolling reduction of the tail part of the steel plate to be 1.01-1.2 times that of the rolling reduction of the pass, rolling the steel plate according to the rolling reduction of the pass and the corresponding roll clearance set value, and when the feed length of the steel plate reaches 70-90 percent of the estimated length of the steel plate obtained in the step 1, rolling the steel plate according to the rolling reduction of the tail part of the steel plate and the corresponding roll clearance to complete the rolling pass; and (3) reversely feeding the steel plate and starting the next rolling pass. The rolling method capable of improving the biting condition in the rolling process of the reversible rolling mill has the advantages that the situation of biting slip in a rolling process can be effectively avoided, the number of passes is reduced, the productivity is improved, and the energy consumption is decreased.

Description

technical field [0001] The invention relates to a rolling process of a reversible rolling mill, in particular to a rolling method for improving the biting condition in the rolling process of the reversing rolling mill. Background technique [0002] The forming and widening stages of plate rolling and the rough rolling stage of hot rolling all belong to high-quality rolling, and usually both hot rolling rough rolling mills and plate rolling mills use reversing rolling mills. In the rolling process, it is usually desired to use as few passes as possible to reach the target thickness of the rolling stage as soon as possible. There are two main advantages of reducing the rolling time. One is to increase the rolling productivity of the production line; the other is to reduce the temperature loss during the rolling process, thereby reducing the temperature of the heating furnace and saving energy. Reducing the number of passes requires increasing the amount of reduction per pass,...

AI Technical Summary

Problems solved by technology

[0009] (1) Increasing the diameter of the roll will inevitably increase the size of the rolling mill archway, motor power, etc., which will greatly increase the investment in rolling mill equipment;

[0010] (2) Forcibly pushing the rolled piece into the roll with external force, additional thrust equipment needs to be added, and the current technology is immature and reliable;

[0011] (3) Changing the surface state of the roll or rolled piece will cause the surface quality of the steel plate to decline, which will easily cause scratches

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