Correction method of rolling mill inclination and skew

Abstract

The invention relates to modification of a rolling mill, particularly relates to a rolling mill correcting method, and provides a rolling mill inclination and skew correcting method. The rolling mill inclination and skew correcting method comprises the following steps: measuring a mounting locating basis for a new rolling production line, determining a reversible type rolling mill center line of key equipment and a processing center surface of a window of a frame, and measuring rolling mill inclination and skew amount to determine a correcting scheme; mounting a lifting device of a rolling mill; arranging stable lifting towers on two sides of the rolling mill to guarantee center lines of the towers to be superposed to the center line of the frame; using a lifting tool beam combined to the frame, and enabling the whole frame of the rolling mill to ascend and descend by using a hydraulic hoisting system device, wherein a safe supporting cushion block is used for guaranteeing safety in a process; and breaking and removing a damaged grouting layer after hoisting, treating foundation bolts, rearranging a bed-mortar base plate, aligning a bottom plate, correcting the rolling mill, pretightening the foundation bolts, carrying out secondary grouting construction, and finally screwing down the foundation bolts. By the method, the damaged rolling mill can be repaired.

Description

technical field [0001] The invention relates to rolling mill transformation, in particular to a rolling mill correction method. Background technique [0002] The reversing rolling mill in the heavy plate mill is its key equipment. After many years of use, there are more and more failures. Everyone knows that any defect in the installation process of the rolling mill will cause the rolling mill to break down at any moment during its use. Recently, it was found that the defects of the installed backing plate and the secondary grouting layer will cause the phenomenon of tilting and skewing of the rolling mill archway and lead to the defect of roll change, so it is necessary to overhaul the rolling line and correct the tilting and skewing of the rolling mill. [0003] What methods and measures to implement are the key to correction. The most common methods are jacking method, single-piece dismantling and reinstalling method, overall dismantling and reinstalling method, etc. Af...

AI Technical Summary

Problems solved by technology

Existing problems First, because the original center reference point of the rolling center line has been lost, when the rolling line equipment is installed again, it is first necessary to re-determine the control network of the installation location

The second problem is that the foundation terrain around the rolling mill is complex. Reasonable and effective layout of the lifting support frame is the key to the tilt correction of the rolling mill. According to the actual working conditions on site, after many on-site measurements and demonstrations, the structural form of the lifting support frame has been designed and determined. and the installation location

The third problem is that there is a slag ditch in the direction of the rolling line of the rolling mill. After the lifting support frame is installed, 16% of the bottom area is suspended. How to solve the problem of 16% of the bottom area of ​​the support frame is also the key to the implementation of this process.