A precision grinding method for rolling mill back-up rolls

Abstract

The invention provides a rolling mill supporting roll precise grinding method. In the implementing process of the method, a roll grinder (4) is used, a dynamic and static pressing head frame (2) and adynamic and static pressing tail frame (3) are used for supporting a supporting roll (1), one end of the supporting roll (1) is machined firstly till the target diameter is reached, and then the supporting roll (1) is turned around to enable the other end of the supporting roll (1) to be machined till the target diameter is reached; and through the dynamic and static pressing head frame (2) and the dynamic and static pressing tail frame (3), the position, machined to be the target diameter, of the supporting roll (1) is supported, and then axial diameter grinding of other positions is conducted. According to the rolling mill supporting roll precise grinding method, one end of the supporting roll is machined firstly, then the supporting roll is turned around to enable the other end of thesupporting roll to be machined, and through the dynamic and static pressing head frame and the dynamic and static pressing tail frame, the position, machined to be the target diameter, of the supporting roll is supported; and through the grinding mode, grinding errors caused by supporting axial diameter original manufacturing errors can be eliminated, so that the requirement for high-precision grinding is met, and meanwhile the influence of supporting axial diameter sizes and the form and location tolerance of a traditional grinding mode on the grinding precision is eliminated.

Description

technical field [0001] The invention relates to the field of grinding processing, in particular to a precision grinding method for backup rolls of rolling mills. Background technique [0002] The back-up roll is an important part used to support the work roll or intermediate roll in the rolling mill to prevent the deflection of the work roll and affect the quality of the plate shape. The quality of the back-up roll directly affects the output and quality of the rolled plate. In engineering practice, under normal working conditions, backup rolls are prone to cracks on the surface and initiation of cracks on the subsurface. The grinding quality of the back-up roll has an important influence on its service life. In the precision grinding process of back-up rolls, the errors caused by the precision of the CNC roll grinder itself and the rotation clearance of the bearings, as well as the machining accuracy and roughness of the center holes at both ends of the back-up rolls will ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of this invention is to provide a precision grinding method for rolling mill back-up rolls to solve the problem of poor coaxiality and cylindricity accuracy when grinding back-up rolls

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