Method for multiplexing box-shaped hole-pattern roller

Abstract

The invention discloses a method for multiplexing a box-shaped hole-pattern roller, which comprises the following steps of: measuring the wearing capacity; correcting hole patterns; manufacturing a template; modifying a turning tool; performing installation and debugging; and performing upper and lower passes of balance calculations to determine the corrections of upper and lower roller groove bottoms and side wall inclined planes and adjust roll gap values. The method breaks through the traditional operating method of 'the fixation of the hole patterns, the template and the turning tool', and is used for maintaining the whole process from the new opening of a roller to the discarding of the roller, and combining the wear condition of the roller to dynamically control the hole patterns. The multiplexing of each time corrects the hole patterns according to the wearing capacity, and the sizes of the template and the turning tool are correspondingly changed along with the multiplexing ofeach time to adjust the roll gap values at the same time. The method ensures that the hole patterns of each pass are used normally, bars are straightened not to fall steel, no cold finished steel bars are generated, the lumber recovery is improved, the notch depth can be reduced, the turning time is increased, and the service life of the roller is prolonged.

Description

[technical field] [0001] The invention relates to a method for repairing and reusing pass rolls used for rolling steel, and is suitable for box-shaped pass blanking mill trains and arc-bottom box-pass finish rolling mill trains with a billet size greater than 100 square meters. [Background technique] [0002] The pass pattern of the roll is determined during the design of the new roll, and the process of the new roll is: balance calculation of the upper and lower passes, drawing of the pass pattern, drawing of the stick, making a sample, making turning tools, turning the roll, and finally installing and debugging. After the roll is used, local wear must occur at the side wall of the rolling hole, and the roll needs to be replaced for repair before it can continue to be used again. The traditional reuse method is: using the original designed pass, template and turning tool, turning the outer circle of the roll to repair the pass, which is called "three fixation of the pass te...

AI Technical Summary

Problems solved by technology

Due to the large wear of the side wall slope of the rolling hole, in order to reduce the amount of outer circle turning (the turning amount will accelerate the scrapping of the roll), the turning tool is generally used to move left and right to repair the pass shape. The repaired pass groove bottom and opening are larger than the original sample plate. The balance calculation cannot be carried out for the front and rear passes, resulting in rolling without lateral pressure, strip shape out of control, and cold strip increase