Minimise vibrations with long tool projections

Vibrations often occur during machining. They cause the system to become dynamically unstable. This can result in unacceptable surface finish, insufficient accuracy, high levels of machining noise, a shortened tool life and, in extreme cases, in broken tools and cutting edges.

To minimise these vibrations and their consequences, MAPAL has developed an innovative system for vibration dampening in the tool shank. In particular, tools for boring and milling with very long projections tend to vibrate due to the insufficient dynamic rigidity of the overall system. When designing the new system, the developers took into account all the factors resulting from the interaction between the machine tool, the tool and its clamp, and the part. The result: A vibration dampening system that is calibrated to the rigidity of all common machine types. It can be used for the machining of a range of workpiece materials with various different tools.

The self-contained system and auxiliary mass and several steel spring packages counteracts and minimises the displacement of the tool body. Compared to tools without an absorber system, the vibration amplitudes can be up to 1,000 times lower. Despite the long projection, the tool runs very smoothly and stably. This allows higher cutting speeds to be used and the material removal rate to be significantly increased. In addition, considerably better surface finished are achieved thanks to the vibration dampening.