Удосконалення процесу холодного гнуття широких заготовок із малопластичних металів на основі розвитку методів технологічної механіки

Abstract

The thesis is devoted to the scientific problem of improving the cold bending process for wide workpieces made from low-plasticity metals regarding rational choice of products geometric parameters, prevention of their damage during forming process. On the basis of the experiment planning theory a regression model of the lateral bending process for wide thick-sheet workpieces has been built, which makes it possible to determine the dependence of maximal deformations in dangerous zones on the geometric parameters. For bending process, deformability theory has been further developed in the form of improving the plasticity diagram construction using the parameter that takes into account the material properties. Dependences have been obtained that enable finding the forces required for stamping products of z-shaped profile on the basis of the metal flow curve and the workpiece geometric dimensions. Technological solutions, that make it possible to reduce deformation force during forming operations, have been elaborated. The main results of the work have been implemented at the following enterprises: “Vinnytsia experimental plant”and company “Elite”.