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And rolling stock on the roll coolant distribution changes, the rack inlet side of the jet set of the new emulsion tubes and part of the installation of new cooling, so temperature can be precisely controlled. Coupled with the rolling schedule optimization, these methods reduce the required 50% of the work roll grinding, and significantly improve the strip shape, thickness tolerance and surface quality at the same time, greatly increase production.
Two four roller cold rolling mill of a renovation project can bring about many improvements. These components are designed to produce the thickness of 0.05 mm to 0.25 mm, width 1630 mm to 1750 mm high quality strip. Reduced downtime and higher production increased rolling rate makes the same time, new control technology allows the thickness and flatness tolerances smaller. In addition, the dry strip exit side can improve the surface quality. These improvements is to be completed by the new strip thickness and flatness control technology, the new roll to adjust the hydraulic system, entrance side and exit side of the thickness measuring device, flatness measuring roller, a single nozzle to adjust the work roll cooling, with total exports of strip guide and guard purge system, transformed into a roller drive motor armature to improve efficiency (rolling speed increased to 1,100 m / min), a lateral displacement of the new work roll change car, and an automatic reel handling system.
algroup the transformation of three foil rolling mill. algroup (Alusuisse Lonza Group) one of the members the United Kingdom Bridgnorth the Lawson Mardon Star Ltd. requires comprehensive transformation of its SMS three foil rolling mills. Plant lowest to 6μm (0.006 mm) of various thickness of aluminum foil.
The project aims to improve the yield and quality through the equipment to adapt to growing market demand, related to the control system updates and rolling speed of the increase. After transformation, the mill installed a new winding machines, coil car and stand on the unloading, aluminum can withstand heavier volumes to rolling.
Work roll and backup roll assembly and the inlet side of the transformation and export side of the new strip rolling guide and guard can improve the speed, especially in the middle and final stages. Flatness and thickness control is fully automatic.
The first mill to complete the work of reform plans in December 2000, the second, three in 2001, respectively, 3 months and 6 months.
Hydro Aluminium's new strip mill. March 1999, Norway's Hydro Aluminium Holmestrand gave SMS a key contract to provide for the rolled aluminum products on the new strip mill,
The scope of supply includes, a Expanded SCR with SMS Backup Roll, complete, the new four high reversing cold rolling mill is not used for both new and existing mill air purification system, and the horizontal plate filter system. SMS process control and automation systems for mill construction, shape and thickness control of the Levels1 and 2 are also part of the contract.
Feed processing mill strip thickness of 1.2 mm to 50μm. Strip width is 800 to 1650 mm, coil weight is 10 tons. Maximum rolling speed is 1600 m / min. Roll size is 360 mm +870 mm diameter × 1800 mm roller body length. SCR Roll control is part of the process control system.
Volume rolling plan in December 2000.
Innovative steel mill
AK Steel's carbon and stainless steel continuous tandem mill. In the past, ferrite and austenite stainless steel only in special, separate cold rolling machine rolling. Due to technological innovations, the most high quality carbon steel, ferritic and austenitic stainless steel can be a lot of production. Less than two years ago, the first continuous tandem cold rolling mill of stainless steel in the United States of AK Steel Rockport put into operation. Figure 13 shows the basic structure of this table mill.
Some of the techniques used are:
Carbon steel and stainless steel laser welding machine