Actual Problems in Machine Building 2015 No. 2

Актуальные проблемы в машиностроении. 2015. №2 Технологическое оборудование, оснастка и инструменты ____________________________________________________________________ 205 MODELING OF JOINT OPERATION OF A MULTI-PURPOSE MACHINE TOOL AND A MACHINED WORKPIECE Atapin V.G. , D.Sc. (Engineering), Professor, e-mail: teormech@ngs.ru Novosibirsk State Technical University, 20 Prospect K. Marksa, Novosibirsk, 630073, Russian Federation Abstract The calculation of a pallet incorporated in the load-carrying system of a heavy rotary-movable table is considered with account for the machined workpiece rigidity only the weight of a workpiece, but also its rigidity. However, a change of the position in space at any point of the workpiece mounted on the tilt-sliding table depends not only on the hardness of the table but also on the hardness of the workpiece. The purpose of the work is to calculate the pallet, which is part of the support system of a heavy machine center taking into account the rigidity of the workpiece. To account for the workpiece rigidity it is recommended to use conditional minimum stiffness workpieces (without walls, edges of rigidity, and closed internal circuits). It is shown that the workpiece rigidity significantly affects the pallet rigidity and in general hence the section of the carrier as a whole leads to a decrease in displacements (43.6%) and weight (22.3%) of pallets. Keywords multi-purpose machine tool, rotary- movable table, modeling, finite elements method