Tunable vibration damper for machine tool outrigger - has mass with resilient cones slidable on shaft to alter effective cone stiffness

摘要

The vibration damper (22) is intended for damping at least one oscillation mode of the outrigger (9) of a machine tool, such as a milling machine (8) arbor. It comprises a damper mass (23) which is resiliently carried on a support (19) of the outrigger (9) via at least one visco-elastic absorber element (27,28) whose elasticity is adjustable (32). The mass (23) is slidably adjustable (32) on a shaft (24) fixed (37, 21; 38,21) in the support (19) and is held on stepped (25,26) portions of that shaft via the elements (27,28) which are conical, so that axial adjustment alters the available radial thickness of the elements at the steps (25,26) and thus their stiffness. This enables the damper to be tuned as required.(DS).