Open AccessМОДЕЛЮВАННЯ ПРОЦЕСІВ КОМБІНОВАНОГО РАДІАЛЬНО-ПРЯМОГО ВИДАВЛЮВАННЯ СКЛАДНОПРОФІЛЬОВАНИХ ПОРОЖНИСТИХ ДЕТАЛЕЙ ІЗ ВИКОРИСТАННЯМ МЕТОДУ КІНЕМАТИЧНИХ МОДУЛІВ
Author(s) -
Наталія Сергіївна Грудкіна
Publication year - 2021
Publication title -
vìsnik kiïvsʹkogo nacìonalʹnogo unìversitetu tehnologìj ta dizajnu
Language(s) - English
Resource type - Journals
eISSN - 2617-9105
pISSN - 1813-6796
DOI - 10.30857/1813-6796.2020.3.6
Subject(s) - kinematics , extrusion , dimple , degrees of freedom (physics and chemistry) , deformation (meteorology) , mechanical engineering , flow (mathematics) , power (physics) , material flow , process (computing) , upper and lower bounds , materials science , mechanics , engineering drawing , computer science , engineering , composite material , mathematics , physics , classical mechanics , mathematical analysis , ecology , quantum mechanics , biology , operating system
Expanding the capabilities of the kinematic modules method to determine the value of the relative deformation pressure and shaping of a semi-finished product in the processes of combined radial-forward extrusion such as hollow parts with a complex profile. Obtaining calculated dependencies that will allow predicting compliance with the required dimensions of the part and assessing the possibility of defect formation. Upper bound method based on the method of kinematic modules is defined investigation of the main factors, affecting the power mode of deformation and features in the shaping of a semi-finished product in the processes of combined extrusion with several degrees of metal flow freedom Based on the upper bound method by using a kinematic module with two degrees of metal flow freedom is determined the value of the relative deformation pressure for make scheme of combined radial-forward extrusion such as hollow parts with a complex profile. The dependences of the increments in the semi-finished product that make it possible to analyze the influence of technological factors in the process of shaping and possible defect formation in the form of dimple are determined. The possibilities of the upper bound method by using kinematic modules with several degrees of metal flow freedom to assess the power mode and shaping of a semi-finished product in the processes of combined extrusion are determined. Significant influence of friction conditions and geometric parameters of the process the appearance of dimple in combined radial-forward extrusion such as hollow parts with a complex profile are considered. Mathematical relationships for calculating the value of the relative deformation pressure and increments of the semi-finished product in combined radial-forward extrusion such as hollow parts with a complex profile that will contribute to a more active introduction of combined extrusion processes in production are determined.