РАЗРАБОТКА РАСЧЕТНОЙ МОДЕЛИ НАПРЯЖЕННО-ДЕФОРМИРОВАННОГО СОСТОЯНИЯ ПОЛУСФЕРИЧЕСКОЙ ЗАГОТОВКИ НА НАЧАЛЬНОЙ СТАДИИ ПРОЦЕССА ВЫТЯЖКИ

Abstract

The automotive industry is developing at a fairly high pace. At the present stage of development of our society, the demands of consumers for these products are increasing more and more. In turn, this forces vehicle manufacturers to improve paint coatings, expand the color gamut, in order to increase the competitiveness of their products. The more modern the generation of the car, the more difficult the paintwork, therefore, the restoration operations. In this regard, the role of the importance of the quality of bodywork performance comes to the fore. Currently, car repair is a profitable business. If the repair of components and assemblies, as well as maintenance, many motorists perform on their own, then the repair of body parts is not for everyone. In addition to specific equipment that allows you to give the original shape to the details, you need work experience, knowledge of modern materials and features of their use. The technological process of modern bodywork has become much more complicated. The main task is the process of reducing labor intensity, financial costs, as well as optimizing the process. When cars collide, folds form on the body parts as a result of bending forces or as a result of loss of stability from compressive forces. Therefore, almost all automotive deformations can be characterized as metal folds of different radius of curvature. This article discusses the calculated assessment of stresses and deformations at the initial stage of a new extraction method using a hemispherical workpiece, which allows to provide favorable deformation conditions and, consequently, to increase the extraction coefficient (K= D/d). A mathematical model of stress and strain calculation implemented on a computer is proposed.