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6.1 INTRODUCTION
COSEN band saw machines are designed to be installed with high quality using high speed
saw blades for maximizing productivity. To be able to use this
kind
of high performance band saw
blade, the machine has to be of rugged design, have high quality saw blade guides, have sficient
motor horse power for high saw band speeds, and has to be able to apply necessary tension to the saw
bands. Your COSEN machine has all these features to provide a better service for you.
The saw blade is guided though the cutting area by roller guides to keep it straight as it
comes off the driving wheels. The precision carbide inserted guides then holds the blade securely and
accurately throughout the sawing process. The tension of the saw blade is adjusted through the
tensioning device on the strong saw bow. The cutting feed and down feed pressure of the blade is
regulated automatically by hydraulic regulation
6.2 BAND SAW BLADE SELECTION
The factors affecting cutting performance are:
Type of material
Material size and shape
Guide spacing
Blade selection
.
Blade speed and feed
Blade tension
Blade vibration
Coolant
Material and its relation to the cutting rate:
Depending on the hardness of the material the cutting rate will increase or decrease. For
example, it takes more time to cut stainless steel than to cut
cast
iron.
The surface conditions will also affect the cutting rate. If there are places on the surface on the
material which are hard, a slower blade speed will be required or blade damage may result.
It will be slower to cut tubing than to cut solids, because the blade must enter the material
twice, and because coolant will not follow the blade as well.
Tough or abrasive materials are much harder to cut than their machinability rating would
indicate.
Tooth spacing is determined by the hardness of the material and its thickness in cross section.
Tooth set prevents the blade from binding in the cut. It may be either a "regular set" (Also
called a "Raker Set"
)
or a "Wavy Set".
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