National University of Science and Technology “MISiS” (Moscow, Russia):

N. L. Lisunets, Cand. Eng., Associate Prof., Dept. of Metal Forming, e-mail: lisunec@yandex.ru

Possibilities of usage of imitating simulation for improvement of efficiency of wasteless shear cutting in the dies and the shears are examined. These processes are applied in blanking production facilities at metal processing companies that use section and sheet rolled metal. The relevance of this study is stipulated by increase of rolled metal cost and necessity to put into practice the resource-saving technologies. Conventional approaches to development of technologies on the basis of physical simulation are analyzed and it is offered to use computer simulation for essential reduction of time for preparation of production. The processes of the cantilever and two-bearing segments of the section billet are investigated. The results of simulation of the process shear cutting of rolled section metal on the crank press and in the computer, using the finite element medium are presented. Based on the experimental results, mathematical models in the form of regression equations to determine geometric parameters of the process are developed. The analysis of the stress-strain state during cutting of rolled steel coils in strip billets using multi-disc shears incorporated in longitudinal cutting lines is performed. Mathematical models of geometrical parameters as quality indicators are developed on the basis of passive production experiment and processing of its results by the methods of statistics. The stress-strain state in the process of cutting of rolled steel coils into strip billets is determined. These results made it possible to optimize the process depending on the mechanical properties of the rolled products and their thickness, as well as to improve the quality of separation surface of the billets.

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