Ultraprecise compact five-axes grinding machine

The economical grinding and milling of complex, precise moulding tools requires high precise positioning in five axes. The increasing demands in the specific markets describe the economical importance of high precise five-axes machining. At the Fraunhofer IPT a compact five-axes machine with hydrostatic bearings is being developed, aiming on a positioning accuracy of 3 micron for work pieces up to 70 x 70 x 70 mm(exp 3). Especially the influences of Abbe as well as thermal errors on the machine accuracy have been investigated and specific design strategies have been carried out. The present paper describes the design approach for minimising the positioning error of the swivel axis exemplarily. With topology optimisation of the mechanical structure, partial component and material substitution as well as exact defined cantilever ratios the positioning error of the swivel axes could be reduced drastically. After deep research activities and technical investigations, the machine will be available for the high precise five-side manufacturing of complex work pieces. Entnommen aus TEMA