Nbar rolling mills pdf file

In flat rolling, the work is squeezed between two rolls so that its thickness is reduced by an amount called the draft. Pdf application of ac motors and drives in steel industries. Guides, rollers, and equipments for rolling mills and. To realize high accuracy in the strip exit thickness, the automatic gauge control agc system is used.

The hot rolling process the primary function of the hot strip mill is to reheat semifinished steel slabs of steel nearly to their melting point, then roll them thinner and longer through 12 successive rolling mill stands driven by motors totaling 77,000 hp, and finally coiling up the lengthened steel sheet for transport to the next process. A basic understanding of the mechanics of rolling mill rolls file. Large ac adjustable speed motors for metals rolling mills. Brg srl is an italian company which produces equipment for rolling mills and small mechanical carpentry. The conditions of operation of reversible cold rolling mills from the point of view of the characteristics of the. A fixed bar across the front and one across the back of the mill approximately 40 inches 102 cm vertically above the working level and 20 inches 50.

Work rolls for coldrolling mills of 91, 92, 92, 82 steel grades 22 mm. Because of roll eccen tricity in backup rolls, the exit thickness deviates periodically. Strip thickness control of cold rolling mill with roll. Thus rehabilitation of existing iron and steel plants and rolling mills of the region is considered an urgent priority. Pdf proposal for 10 tph tmt bar rolling mill rizwan. After power current hardening the depth of the working surface is no less than. The hot rolling process california steel industries. T m and t r can be obtained from abb drive system which use the direct torque control dtc technology, the high frequency components of. In rolling mill, the accuracy and quality of the strip exit hickness aret very important factors. Within a matrix of steel a high number of graphite particles of various size and shape are istributed. Application of ac motors and drives in steel industries.