Design of an active fluid damping system for vibration control of disk-shaped tools

Abstract

To meet the requirements of today´s cutting process of natural stones thin disk-shaped tools with
large diameter are applied at high cutting velocities. To use these tools, guiding systems for the disks
are needed. Therewith, tool vibration magnitudes and deflections can be reduced. The risk of producing
scrap parts or tool damage are decreased. However, the guidance being placed close to the
cutting zone reduces the cutting depth, so that the process is limited to the production of small slabs
and tiles. To use the advantage of a guidance without limiting depth of cut, a new guidance concept
is presented. Thereby the guiding areas are placed opposite to the cutting zone. This enables the
reduction of tool vibration without decreasing the depth of cut. In this paper the compensation of tool
vibration by this guiding concept is investigated. Different types of guidance are compared and the
most suitable compensation approach is identified. Further on, the problem of the decreasing compensation
effect, due to the increasing distance between the excitation and the guidance is considered.
To increase the compensation effect, the guidance is optimized regarding to the number and
positon of guiding areas. The capability of the presented concept is verified by a comparison with a
conventionally placed guiding system.