CIRCULAR SAWING
Circular sawing involves the use of
a rotating cutting blade that can be fed horizontally, vertically, or at an
angle into the material. Circular sawing is highly accurate because of the
rigidity of the machines and the cutting blade.
This process can produce burr-free
surfaces and can reduce the need for secondary finishing operations.
The process produces a larger kerf
than bandsawing, although circular saws as thin as 1.5 mm (0.060 in.) are
available. These thin blades, however, cannot maintain the tolerances and high
cutting forces for which circular sawing is noted.
This process is used primarily for
stock cutting or the creation of straight prismatic channels along the length
of a workpiece.
Typical Applications
§ Stock cutting.
§ Carpentry.
§ Building trade.
§ General engineering use.
§ Creating channels/grooves in
materials.
Mechanical design
guidelines
§ Cutting depth is constrained by how
much of the blade’s radius is exposed.
§ This process is more commonly used
for stock cutting, however it is possible to create basic prismatic features
(e.g. channels, lap joints or tongue and grooves).
Process variations
There are many versions of this
process with either the workpiece being fixed and the blade is movable or
vice-versa). Hand-held circular saws are also available.
Alternative names
§ Cold saws, cold sawing
Environmental
implications
Can be extremely noisy. Ear
protection should be worn for extended operation.
Economics
Circular saws represent a larger
capital investment than bandsaws or hacksaws. They are generally
used for high volume cutting of steels or non-ferrous alloys.
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