Abstract
The possibilities of using and embedding kinematic trapezoid modules with curvilinear boundaries of different shapes were explored. Based on the energy method, the generalized formulas for calculating the power of deformation forces inside the axial trapezoidal kinematic module were derived. Different types of selecting the functions that describe a curvilinear boundary of the axial trapezoidal module were identified. We have analyzed the possibilities of using known techniques for the linearization of integrand dependences in order to calculate the power of deformation forces when it is impossible to obtain a given magnitude in the form of an analytical function. The ways to derive engineering formulas for the computation of components of reduced pressure inside an axial trapezoidal kinematic module were proposed. Based on the energy method, we obtained formulas for the calculation of a step-by-step change in the shape of a semi-finished product under assumption within the axial trapezoidal kinematic module. We modeled the process of combined extrusion of hollow parts with a flange and established regularities in shape formation depending on geometrical parameters. The data about a step-by-step change in the shape of a semi-finished product during deformation were obtained. A comparative analysis of calculation schemes for the rectilinear trapezoidal kinematic module and with a curvilinear boundary under assumption within the studied module was performed. It was confirmed that the reported ways for obtaining engineering formulas, as well as the algorithm for the calculation of processes of combined extrusion that is based on them, simplify the development of technological recommendations. This applies both to determining the force mode of extrusion and preliminary assessment of a change in the shape of a semi-finished product with the possibility to control a metal outflow in the process of deformation
Highlights
The development of branches of modern machine building is inseparably related to the development of new resourcesaving technologies enabling the production of high-quality products with the lowest indicators of production labor intensity and the highest coefficient of utilization of metal
We will note that the processes of cold volume forging (CVF) by extrusion enable obtaining the billets with precise dimensions and high surface quality
The aim of this study is to find effective ways to obtain engineering formulas and the algorithm for calculation of energy-power parameters and prediction of the change in a shape of a semi-finished product in the combined extrusion processes with several degrees of freedom of flow based on the method of kinematic modules
Summary
PRODUCT IN THE PROCESS дині осьового трапецеїдального кінематичного модуля. OF COMBINED EXTRUSION отримані формули для розрахунку поетапного формозмінення напівфабрикату за допущення γ r z = 0 в межах осьового трапецеїдаль ного кінематичного модуля. L. Aliieva формоутворення від геометричних парамет рів. Отримано дані про поетапне формозмінен ня напівфабрикату в процесі деформування. Проведено порівняльний аналіз розрахунко вих схем для прямолінійного трапецеїдального кінематичного модуля та з криволінійною гра ницею за допущення γ r z = 0 в межах розгляну того модуля. Ключові слова: комбіноване видавлювання, кінематичний модуль, енергетичний метод, лінеаризація функцій, процес деформування
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