Abstract
Based on lots of field experiments and theoretical research, fully thinking the equipment and production craft characters of four high cold mill, a new cambering scheme for four high cold mill is advanced in this paper. This scheme considered the need of production of multi-specification products, as well as the control of roller ends contact. The most homogeneous transverse distribution of front tension is the control target and the homogeneous pressure distribution between rollers is the constraint condition. In this technology, working roll curve adapt the combination of cosine curve and high order curve, backup roll adapt the combination of cosine curve, straight line and high order curve. The cosine subentry of working roll and the high order curve subentry are used to control edge wave, the high order curve subentry of working roll is used to control the roll contact, the cosine subentry of backup roll is used to reduce the center wave. That’s the features of this technology. On-site testing shows that the new cambering and combination can not only manage the complex waves of normal four high cold mill effectively, but also will reduce the contact between roller ends and minish roll consumption. This technology has created economic benefits for enterprises.
Highlights
In recent years, with the rapid development of manufacturing industry, customers put forward higher and higher requirements for the dimension accuracy of cold rolling strip and coated production
The cambering of four high cold mill in production site only aimed to a single wave, for example, when there are many edge waves, the convex roll-shape of working roll and backup roll is often adopted; when there are many center waves, the disposition form of roll configuration curves is the concave roll-shape of working roll and plain roll-shape of backup roll
For the need of on-site shape control, the management of complex waves and single waves are taken into account, the most homogeneous transverse distribution of front tension is the control target and the homogeneous pressure distribution between rollers is the constraint condition, and for reducing the contact of roller ends at the same time, a new cambering technology of four high cold mill was put forward, the basic design idea is that working roll curve adopt the combination of cosine curve and high order curve, backup roll adopt the combination of cosine curve, straight line and high order curve
Summary
With the rapid development of manufacturing industry, customers put forward higher and higher requirements for the dimension accuracy of cold rolling strip and coated production. The emphasis of field breakthrough is how to effectively control the complex wave defects of four high cold mill from the point of roll configuration curves For this reason, after lots of field experiments and theory research, a new technology of cambering which is fit for normal four high cold mill was put forward, the optimized roll configuration curves can accommodate different strip shape, can manage the complex waves and can manage the single wave and reduce the contact of roller ends. After lots of field experiments and theory research, a new technology of cambering which is fit for normal four high cold mill was put forward, the optimized roll configuration curves can accommodate different strip shape, can manage the complex waves and can manage the single wave and reduce the contact of roller ends This technology has important effects on ensuring the stability of strip shape and has created economic benefits for domestic steel makers
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