One of the more difficult aspects of dealing
with machined parts is the task of deburring
or removing the burrs left by the machining
processes. Burrs are simply small pieces
of material, still clinging to the edges
of a newly machined part. They are often
very sharp and can cause problems with handling
and finishing the part so they must be removed.
There are literally thousands of methods
of deburring since there are so many different
variations of machining processes, part
size, and part geometry. Most deburring
includes somes sort of abrasive process
- brushes, tumbling etc. - to remove the
burrs. One of the most common methods for
small parts is barrel tumbling.
Deburring is often accomplished tumbling
parts in a barrel or a vibratory bowl, along
with finishing media. Ceramic media is often
used for steels. For softer materials, plastic
media, walnut shells and other materials
can be used. This type of deburring is usually
confined to unfinished materials.
For materials that are already finished,
such as pre-plated or pre-painted materials
bulk deburring operations are not suitable,
because the deburring will remove the finish
along with the burrs. For these materials,
other forms of deburring such as belt sanding
or hand filing will have to be done with
the associated higher costs.