Thus to summarize the influence of cutting parameters, the
results indicate that stiffness ratio, cutting speed, feed per tooth
and axial depth of cut tend to increase the sound pressure level.
This is due to the increase of the impact energy transmitted to the
mechanical system, which responds by vibrating and therefore
radiating structure-borne noise. Indeed milling induces mechanical impacts at the contact between each cutting edge and the
workpiece. Then the vibration propagates through the mechanical
components (tool + spindle + machine-structure + fixture + part).
In the present work, the weak element of these components
was the part itself, but it can also be the tool or any other
components. For instance, by selecting a small diameter mill,
industry can face similar problems. So, a compromise has to be
found between a small diameter that limits sound emission due to
air turbulences and a large diameter that limits chatter.
As a consequence, when facing severe noise emission, industry
has first to develop original clamping systems that increase part’s
stiffness or that damps vibration efficiently, for instance by active
damping as proposed by