Due to the poor working environment of rolling mill equipment in practical application, some unexpected phenomena may be encountered during operation. For example, when the rolling cooling water encounters the red hot billet, it atomizes rapidly and sprays the iron oxide powder falling off from the billet surface around. The roll has a great impact on the frame archway through the bearing seat.
Moreover, if such a situation occurs for a long time, it may also lead to different degrees of corrosion and wear on the inner window surface of the mill frame and the bottom of the frame. Professional rolling mill manufacturers believe that in this way, the gap between the rolling mill frame and the roll bearing seat will be difficult to be effectively controlled. Therefore, the gap between the mill frame and the roll bearing seat may exceed the management limit.
More importantly, with the increase of clearance, the working conditions of the main drive system of the rolling mill will be further deteriorated. Professional rolling mill manufacturers believe that it may cause large vibration and impact of the main drive, and it is easy to slip when the ingot is bitten, which will affect the control of plate shape, and then have a serious negative impact on product quality.
We should know that in practical work, most of the mill housings are made of ordinary steel castings. In the process of long-term use, the window surface is vulnerable to corrosion and wear, resulting in the deterioration of working conditions. Professional rolling mill manufacturers said that at present, the memorial archway is usually repaired by on-line machining.
This repair method is relatively simple to operate, but because it does not fundamentally improve the properties of the archway surface, the archway surface will be corroded and worn and become invalid after being used for a period of time. Another more advanced method is to use polymer composites to solve the problem of mill housing wear.
