Instantaneous Stiffness Analysis and Application in Stewart Parallel Machine Tools

The investigation is carried out into the tooling process of a 6-6 Stewart parallel machine tool with dynamic features.The derivation into the instantaneous 6-6 parallel structure stiffness mathematical models is performed.The calculation simulation results in the stiffness matrix and cutter deflections during tooling process.A self-developed software system has packaged numerical simulations to enable the variety of different structure parameters and tooling conditions.The results provide the algorithms for control and calibrations on the machining accuracy and the theoretical information for optimum configuration,workspace and loading.