Abstract
The results of system analysis of steel sheet hot rolling process are presented. It is shown that system analysis ensures the effective way for choosing the mathematical simulation of multidimensional technological processes. The detailed scheme of steel sheet hot rolling process is figured which determines its both input and output parameters. For the hot rolling technological operation flows of material, energy, and information are shown. It is proposed to analyze the hot rolling process as a totality of target functions which makes it possible to gain the required level of steel sheet mechanical properties. The proposed approach based on system analysis enables to reveal tendencies in hot rolling process development. Differences between technological and technical systems are detected. Analysis of the existing approaches of technical and technological systems definitions in accordance with current standards is presented which allows to state their peculiarities. It is noted that estimation of dependability is carried out using criteria of quality, productivity as well as criteria approach can also be used. Depending on the aim of dependability estimation the calculating, experimental-statistical, registration or expert method are applied. Estimation of different technical systems dependability is based on the identification of such indicators as maintainability, reliability ,durability, and its and maintenance support performance.
Keywords
Hot rolling, steel sheet, technical system, technological system, dependability, evaluation.