|
Zenith has constructed many aluminum rolling mills not only in Japan but also in other countries around the world, for both hot and cold rolling. No other manufacturers in the world can consistently manufacture and supply aluminum hot rolling mill facilities to foil rolling mills. This paper outlines the setting calculation systems we have provided to recent rolling mills. Table 1 shows our supply records of mill setting calculation systems for aluminum rolling mills. Before starting operation, rolling mills require settings, including q roll gap settings, w entry and delivery tension settings, e speed settings, r default settings of a f latness controller, and t settings of coolant spray timing and pressure for roll cooling and rolling lubrication.(gold mining process in Kenya) Setting calculation is done to model the data that can be theoretically calculated into mathematical models, f rom among the rolling mill set ting data, and to calculate them numerically. The set t ing calculation system t ransfers these calculation results together with the setting conditions of auxiliary equipment to be determined based on the actual records of rolling operation, into the mechanical system, as the default data. The accuracy of each rolling operation is evaluated using the adaptive learning function included in this system. Based on these results, the setting data for next rolling operation is modif ied to improve the setting accuracy. A setting calculation system with an adaptive learning function achieves stable operation and improves the thickness distribution accuracy of product coils. In the industry, machine operation command sequence programs are conventionally called “Level-1” and setting calculation systems are called “Level-2” to clarify the sharing of functions.(moinhos para plastico) When it is necessary to maximize the accuracy at the end of a rolled coil, the prediction accuracy must be improved and a setting calculation system called “Level 2” plays an important role in calculating the rolling load, calculating the strip crown (index of thickness distribution in the strip width direction), and predicting the coil winding temperature. On the contrary, a machine operation command sequence program called “Level-1” fulfills its functions in the feedback control immediately after rolling is started.(catalogo molino de bolas) Without this setting calculation technique, settings at the beginning of rolling depend on the institution and the experience of the rolling operators. For example, a company that has just entered the rolling industry and is building a new rolling mill will continue to stumble around in the dark and waste management resources until it accumulates rolling skills and experience. This setting calculation technique is also beneficial for a rolling company that has many past achievements. When that company renews its equipment, it can ref lect its accumulated achievements and the setting calculation technique it has used off-line so far, in the newly introduced setting calculation system, and thereby can restart operations quickly. (avantage concasseur a machoires) This has been proven in cases where a setting calculation system is newly introduced at the same time as aluminum rolling mills are modified. Steel and aluminum rolling companies in Japan attach importance to this technical field as a technique that forms the foundation of rolling operation technology, and they have been making efforts to improve their own operation technology through repeated development and improvement.
Related Articles -
Aluminum Rolling Mill, Mill Setting Calculation System,
| 
