Higher Surface Quality through Vibration Dampaning

Vibrations often occur during machining. This leads to dynamic instability of the system and cause a multitude of failure potential. MAPAL's innovative system for vibration dampening increases surface quality significantly.

Inadequate surface finishes, insufficient accuracy, high machining noises, shortened tool lives and, in extreme cases, broken tools and cutting edges can be the result. 

In order to minimise these vibrations and their consequences, MAPAL has now developed an innovative system for vibration damping in the tool shank, as particularly tools for boring and milling with very long projection length tend to vibrate due to an inadequate dynamic rigidity of the overall system.

When designing the new system, the developers took into account all factors arising from the interaction of the machine tool, the tool and type of clamping as well as the component. The result: A system for vibration damping that is matched to all common types of machine stiffness. It can be used for machining different materials with different tools.
The new milling cutter arbors with vibration dampening enable significantly better surface finishes during machining. The image shows in direct comparison on the left milling paths without vibration dampening and on the right with vibration dampening. 

Higher Cutting Speed, Significantly Higher Service Quality

The self-contained system of auxiliary mass and several steel spring packages counteracts the deflection of the tool body and minimises it. The vibrations can be up to 1,000 times lower compared to tools without absorber system. Despite the long projection length, quiet, stable running is achieved. This makes it possible to work at higher cutting speeds and significantly increases the material removal rate. In addition, significantly better surface finishes are achieved thanks to vibration damping. 

Rz value was halved from 7.8 µm to 3.9

When milling case hardened steel (16MnCr5), for example with a 250 mm long combination of milling cutter arbor and milling cutter with five cutting edges and ISO indexable inserts (diameter 50 mm), the Rz value was halved from 7.8 µm to 3.9 µm for material removal ae of 18 mm and ap of 3 mm compared to the same tool system without vibration damping.
Milling cutter arbors with vibration damping in the shank are available with internal coolant supply for clamping diameters 16, 22 and 27 mm with a length of 200 and 300 mm for SK40, SK50, HSK-A63 and HSK-A100 connections.
The vibration dampening system is located directly in the tool shank of the new milling cutter arbor. 

Kathrin Rehor, PR Project Manager at MAPAL


Kathrin Rehor Public Relations Kathrin.Rehor@mapal.com Phone: +49 7361 585 3342

Further articles from the section Technology