Three-roller oil scraping device of Sendzimir twenty-high rollling mill

Abstract

The invention discloses a three-roller oil scraping device of a Sendzimir twenty-high rolling mill. The three-roller oil scraping device comprises three sets of oil scraping roller devices on the outlet side of a rolling mill housing and three sets of oil scraping roller devices on the inlet side of the rolling mill housing. The three sets of oil scraping roller devices on the outlet side of the rolling mill housing are sequentially a first coarse oil scraping roller device, a second fine oil scraping roller device and a third fine oil scraping roller device from inside to outside, the three sets of oil scraping roller devices on the inlet side of the rolling mill housing are sequentially a first coarse oil scraping roller device, a second fine oil scraping roller device and a third fine oil scraping roller device from inside to outside, and an oil baffle curtain is arranged between every two sets of oil scraping roller devices. The first coarse oil scraping roller device and the second fine oil scraping roller device on the outlet side of the rolling mill housing are respectively provided with a proportional valve capable of controlling the pressure between an upper roller and a lower roller, and the first coarse oil scraping roller device and the second fine oil scraping roller device on the inlet side of the rolling mill housing are respectively provided with a proportional valve capable of controlling the pressure between the upper roller and the lower roller. According to the three-roller oil scraping device of the Sendzimir twenty-high rolling mill, the residual rolling oil on the surface of a silicon steel plate is reduced, the occurrence probability of oil stains and corrosion defects is reduced, the productivity of the rolling mill is released, and the process downtime caused by an operation plan is reduced.

Description

technical field [0001] The invention relates to the technical field of oil scraping for rolling mills, in particular to a three-roll oil scraping device for a Sendzimir twenty-high rolling mill. Background technique [0002] Sendzimir rolling mill is widely used in silicon steel sheet rolling due to its high arch rigidity and small diameter of work rolls. The rapid growth of China's industry has undoubtedly led to a surge in the production of power equipment, which has greatly promoted the vigorous development of domestic silicon steel. The competition among silicon steel products of major steel mills has developed from performance, longitudinal thickness difference and transverse thickness difference, and plate shape to high requirements for the surface quality of steel coils, especially high-grade non-oriented silicon steel. Thin, the customer's requirements for the surface quality of silicon steel are increasing day by day. At present, Baosteel Co., Ltd. Wuhan Qingshan ...

AI Technical Summary

Problems solved by technology

At present, Baosteel Co., Ltd. Wuhan Qingshan base produces silicon steel sheets at the Sendzimir reversible rolling mill. The original two-roller plus side blowing oil scraping method is used at the entrance and exit. The oil scraping effect is poor and the rust resistance is poor, which cannot meet the current requirements. When producing non-oriented high-grade grades, the finished product pass must be produced at a speed limit of 300m / min or less, and the process residence time can only be guaranteed within 48 hours. The occurrence rate of oil stains and rust is high, and the monthly yield rate is more than 2%.

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