MINERAL CASTING AS MATERIAL FOR MACHINE BASE-FRAMES OF PRECISION MACHINES

摘要

Polymer concrete is an adequate base-frame material for highly-integrated base-frames produced in series. To diminish production costs replication technology is recommended.rnThe properties of mineral cast spread statistically. Another issue is creeping under load. They have to be taken into account by the designer with process control and overdimensioned parts with large safety factors. The excellent damping properties of mineral cast are not relevant in measuring machines because dynamic forces and resulting bending and torsion are significant smaller than machining forces with solid-borne vibrations.rnTo sum up: mineral cast is recommended as base-frame for precision machines with precision ≥ 10 μm, it is applicable for precision ≥ 1 μm and not applicable in submicrometer-range due to uncertain long-term stability.