TPT November 2008

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November 2008 112 ›
Cutting, Sawing & P rofiling T echnology
Sägen-Mehring, Germany, has developed
a new range of high-performance metal
band saws branded RIX-Formula SPF.
The saws, are based on a new complex
SPF-coating and multi-step procedure to
improve the concealment of cutting edge
coating. Using this technology, higher
temperature resistance and red hardness
can be achieved.
The new saws have been developed in
response to increasing industry requirements
for metal sawing machines and cutting tools.
Higher cut rates are now specified, with
more cm² of cut area per minute, higher tool
life and more precise cross sections. This
equates to less cost per cut.
In the area of cutting tools (ie metal band
saws), the development stages over past
years have been well documented. Bi-metal
band saws are equipped with modern
alloyed cutting materials made from high
speed steels. The backing bands feature
high resistance against tensile stress,
alternating bending load and torsional
stress.
It was becoming increasingly difficult
to make further improvements to these
components. Established and developed
versions of setting and tooth geometries
were, in many cases, specifically conceived
for predetermined application areas, mainly
for wear-resistant steels and alloys.
Further improvements were predicted
by using tungsten carbide as a cutting
material. However, it had seemed that
the long expected breakthrough could
not be implemented on a wide basis. The
dominant industry opinion had been that
band saws with tungsten carbide tips could
be used economically, especially with the
availability of sawing machines with high
drive capacities and short cutting times.
In the search for new efficient ways to improve
performance, due to existing experiences
with precision cutting tools, an answer was
found in coating processes and cutting edge
treatment. It has been possible to achieve
technically viable methods for coating of ‘coil
ware’ and repeatable and exactly definable
treatment methods for saw teeth.
The new RIX-Formula SPF band saws
provide higher cutting speeds, larger feed
values and outstanding cross section
qualities. This is even the case with
very hard steels, austenites and high-
temperature alloys.
Extended application tests using RIX-
Formula SPF band saws have been
undertaken at a big German steel
distributor. The test results show
economical and efficient cutting speeds and
cut rates – close and sometimes better than
the values reached by TCT band saws.
Even high-tensile steels were cut with a
cutting speed of more than 60 to 70m/min.
In addition, this performance did not have
any negative effects on accuracy.
On a cutting length of 700mm a tolerance
of less than 0.1mm could be measured.
These high cutting values had no negative
effects on cross-sections, leading to finely
structured and spotless cross sections.
Sägen-Mehring GmbH – Germany
Fax: +49 6205 20 98 496
Email:
Website:
Bi-metal band saws with higher performance