The influence of double rolling camber fit error of secondary cooling area bearing roller on casting quality
In the process of continuous casting, the double rolling camber fit error of secondary cooling area bearing roller has a great influence on the quality of the casting product. The double roller camber fit error, directly related to the production quality and product quality of the continuous casting, affects the surface quality and defect of the rolling slab and directly affects the dimensional accuracy of the product. Therefore, it is necessary to discuss the influence of the double roll camber fit error of the secondary cooling support roller on the casting quality in order to make a proper adjustment of the production process.
The double roll camber fit error of the secondary cooling support roller, which consists of the top roller and the bottom roller, affects the accuracy of the longitudinal shape and transverse shape of the slab, and makes them not easy to control and deform extensively. When the double roll camber fit error of the secondary cooling support roller is too large, it will cause the deviation of the solidification shape of the casting product, which will also lead to the deformation or even perforation of the slab itself. In addition, the obliquely deformed slab will easily cause the cutting difference between first and last cuts when cold rolling, and the shear force of continuous casting slab will be weakened, resulting in the centerline collapse of the continuous casting product, and further affecting the accuracy of the product size.
Therefore, to ensure the quality of continuous casting products, it is necessary to pay attention to the double roll camber fit error of the secondary cooling support roller. It is mainly to adjust the roll gap reasonably and pay attention to the installation of the roll to ensure that the roll swing is correct. When installing and disassembling the roll, it is necessary to keep the axis of the roll in the same vertical plane and choose the corresponding force according to the casting speed to maintain the gap. During operation, it is necessary to check the lubrication system, aging and absence of connecting parts, and whether the gap between support rollers is consistent, especially when the bearing roller wears more seriously, operation parameters should be adjusted in time.
In short, during the production process of continuous casting, the double roll camber fit error of the secondary cooling support roller has an important influence on the quality of the product, which requires the operator to pay attention to the installation and use of the roller, adjust the roll gap with reasonable force, and ensure the accuracy of the roll swing. If the roll bearing has serious wear, it should also be according to the principle of continuous production, adjust the production parameters in time, so as to ensure the production quality of the continuous casting product.
