Rolling mill and pretightening balance system thereof

Abstract

The invention relates to a pretightening balance system of a rolling mill. The pretightening balance system comprises pull rods, inner-layer sleeves, outer-layer sleeves, balance nuts, through covers and pretightening springs, wherein the pull rods are arranged at the two ends of a mill roll, and are provided with external threads; the inner-layer sleeves are connected to the pull rods through threads, and form lead screw and slide block mechanisms with the pull rods; the outer-layer sleeves are fixedly connected to bearing bases, and sleeve the pull rods; the bottom ends of the outer-layer sleeves are butted against the inner-layer sleeves through sleeve pads; one surfaces, in contact with the inner-layer sleeves, of the sleeve pads are spherical surfaces; the balance nuts are connected to the pull rods through threads, and form lead screw and slide block mechanisms with the pull rods; the through covers sleeve the pull rods, and the lower ends of the through covers are fixedly connected with the outer-layer sleeves and the bearing bases; the through covers cover the balance nuts inside; the two ends of the pretightening springs are correspondingly butted against the through covers and the balance nuts; and the pretightening springs are in a compression state. The pretightening balance system is more reliable in work and longer in service life. The invention further discloses a rolling mill adopting the pretightening balance system.

Description

Technical field [0001] The invention relates to the technical field of metallurgical manufacturing, in particular to a rolling mill and its preload balance system. Background technique [0002] Rolling mills are needed in the process of rolling steel. Normally, the rolls of the rolling mill are connected to tie rods arranged symmetrically on both sides through a chock. [0003] In order to ensure that the roll gap of the rolling mill can be adjusted, the tie rod is specifically provided with external threads, the tie rod is sleeved with a sleeve, the bearing seat for supporting the roll is fixed on the sleeve, and the sleeve is provided with external threads on the tie rod Adapted internal thread. When roll gap adjustment is required, the pull rod is driven to rotate by the drive device. The pull rod and the sleeve form a typical screw slider mechanism. The rotation of the pull rod will be converted into the up and down translational movement of the sleeve on the pull rod axis to ...

AI Technical Summary

Problems solved by technology

[0006] However, as we all know, the working conditions of elastic colloids are relatively harsh, and they are not suitable for high and low temperatures. At the same time, due to the effect of alternating loads, elastic colloids will age rapidly and their service life is very short. Frequent replacement of elastic colloids will cause great harm. The increase in steel rolling costs

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