Extruding aluminum bars on a new structure radial shear mill

In this work the stress-strain state (SSS) billet made by an aluminum 7075 alloy were investigated during combined rolling-extrusion on a radial shear mill (RSM) of a new design. The billet was first rolled in smooth or helical rolls and then extruded through the matrix channel. The main regularities of the SSS distribution and the combined process of the blank temperature have been established by using the finite element method and MSC.SuperForge program. The influence of rolling modes in smooth or helical rolls and further extrusion in a matrix on the formation of rods structures were analyzed. It was found that, a fine-grained structure was formed along the section of the manufactured bars, which increases the quality of metal products

ОПРЕДЕЛЕНИЕ РАЦИОНАЛЬНЫХ РЕЖИМОВ ДЕФОРМИРОВАНИЯ СТАЛЕЙ И СПЛАВОВ ПРИ ИСПОЛЬЗОВАНИИ СОВМЕЩЕННЫХ ПРОЦЕССОВ КОВКИ

The quantitative data are established and main regularities of the distribution of the deformation mode when modeling forging using a radial forging machine with canting angles of 30°, 60°, 90°, 120°, 150°, and 180° and magnitudes of reductions of 10, 15, and 20 % are obtained by the finite-element method using the MSC.SuperForge program. It is shown that the degree of shear deformation is maximal at segments adjoining the billet surface and minimal in its central zone.Методом конечных элементов и с использованием программы MSC.SuperForge получены количественные данные и установлены основные закономерности распределения напряженно-деформированного состояния и температуры при моделировании ковки на радиально-ковочной машине с углами кантовки 30°, 60°, 90°, 120°, 150° и 180° и величинами обжатий 10, 15 и 20 %. Показано, что степень деформации сдвига имеет максимальное значение на участках, прилегающих к поверхности заготовки, а наименьшее – в центральной ее зоне