In precision engineering the importance of the base-frame on the precision of the machines is often underestimated. Machine base-frames define the position of subsystems like drive systems, measuring systems or machining devices to each other and are often the most expensive single part of a positioning machine. The aim is to achieve low-cost, highly integrated base-frames. In this article materials for machine base-frames of precision machines are compared and design guidelines for mineral cast are derived. In ultraprecise measuring and machining the base-frame has to guarantee the stable position of all subsystems with high rigidity against static and dynamically changing thermal loads and mechanical forces and torques. The long-term stability is a crucial issue of the base-frame as well.
展开▼
