Cold rolling mill comprising a side-shift system

The side shift adjustment system with rotary helical pushing devices addresses work roll cambering issues in 4-High and 6-High rolling mills by balancing vertical and horizontal forces, enhancing roll accuracy and reducing maintenance, especially for small-diameter rolls.

US20260138167A1Pending Publication Date: 2026-05-21FIVES DMS
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Patent Information

Application Number
US19/367368
Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
Priority Date
2024-10-23
Filing Date
2025-10-23
Publication Date
2026-05-21

AI Technical Summary

Technical Problem

Existing 4-High and 6-High rolling mills face issues with work roll cambering due to unbalanced vertical and horizontal forces, leading to excessive horizontal deflection, especially with small-diameter rolls, and prior adjustment systems like sloped wedges increase bulk and require frequent maintenance.

Method used

A side shift adjustment system using rotary helical pushing devices with helical guide surfaces and actuators to balance work rolls by adjusting the side shift between the work roll axis and the backup or intermediate roll axis, allowing progressive control and backlash compensation.

Benefits of technology

The system effectively balances work rolls, reducing horizontal deflection and maintaining roll accuracy, particularly for small-diameter rolls, while minimizing maintenance needs and bulk expansion.

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Abstract

A 4-High or 6-High cold rolling mill, configured for rolling a metal strip, includes a rolling mill stand including, at a front side, a first pair of posts and, at a rear side, a second pair of posts, an upper work roll including a roll table configured to come into contact with the upper surface of the metal strip and two guide ends, a lower work roll including a roll table configured to come into contact with the lower surface of the metal strip and two guide ends, left and right first pushing mechanisms, and left and right second pushing mechanisms including all or part of the rotary helical pushing devices to ensure a side shift between the work roll and a roll bearing on the work roll.
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