СТРУКТУРА ДОСЛІДЖЕННЯ ЕНЕРГОСИЛОВИХ ПАРАМЕТРІВ ПРОЦЕСІВ ЛИСТОВОГО ШТАМПУВАННЯ

Abstract

One of the main tasks of theoretical research is to identify optimal conditions for deformation. The greatest interest for practice is determination of main technological parameters of shaping process and their connection with external factors. The solution to the problem is a very important and crucial stage of theoretical investigation. It is inextricably linked with choosing theoretical method of analysis and design scheme, which most fully meets requirements and particular case of shaping conditions. The article discusses structure of complex theoretical and experimental investigations sheet drawing energy-power parameters of technological processes. Mathematical model has been proposed based on the constructed structural-logical scheme for effective forecasting of energy-power parameters, which determines methods and sequence of theoretical and experimental researches. It reflects correlation between functional characteristics of machining and technological parameters of the sheet stamping-drawing. The character of shaping has been determined, which is provided by plastic deformations in the processes of metal working by pressure. It has been determined that loss workpiece stability or its destruction impose restrictions on allowable deformation degree, which is defined in the deformation zone by stress field. Method for calculating processes of plastic deformation metals is proposed which it is using to theoretical investigation energy-power parameters of technological processes of sheet stamping. It is based on closed system equations of continuum mechanics. The form of particles velocity functional dependence of plastically deformable material on coordinates in stamping-drawing process of sheet has been determined. Expressions are analyzed which make it possible to make the spatial picture distribution of deformation in metal during sheet stamping. This allows visualizing deformation mechanism and simplifying the analysis material deformed state. The relationship between velocity and energy dissipation function is shown at total work deformation is found, which makes it possible to determine force parameters of sheet stamping-drawing process. A functional relationship between the deformation power and the parameters of processing modes during sheet stamping has been investigated. Approaches to determining deformed material state are considered.