Material
matters
Steed Webzell reports on the latest solutions for sawing specifi c
workpiece materials, including structural steel, aluminium and graphite
Structural steels are more aggressive
to cut with bandsaw blades than any
other metal sawing application,
reports Bison Machinery (https://is.gd/
uxopar), a supplier of bandsaw machines
from principals such as Sterling, Bianco and
Bauer. Paying careful attention to band and
tooth set selection, along with use of
optimal band speed, feed rate and coolant,
can signi cantly minimise blade wear.
SAWING & STEELWORKING APPLICATION-SPECIFIC SOLUTIONS
The bandsawing of I-beams, square tube,
round tube, angles and channel presents a
number of speci c challenges for bandsaw
blades. With a combination of at surface
areas and vertical walls, these materials
would ideally require blades with
substantially different tooth pitches in order
to deliver effective sawing. Additionally, as
structural sections are cut, changes in
material tension can cause the cut to close
Prosaw can offer
various circular
sawing machines for
aluminium cutting,
including this
automatic extrusion
saw from Metlsaw
up and bind on the saw blade band.
According to Bison Machinery, the best
way to minimise blade binding in structural
steels is to use a blade that bene ts from
wider set teeth to create a larger kerf. Tooth
geometry, including rake angle, clearance
angle and gullet depth, are optimised to
create a larger cutting channel, which helps
to prevent the blade binding without
compromising blade strength.
There are several blade options available
for sawing structural steels, including the
GoldCut Beam-Master blade. Blades of this
type use a novel tooth design for the
Saw sharpening specialist gears up with Vollmer
Basco Tool Industries from Faridabad, near New Delhi,
manufactures carbide-tipped circular saw blades and has relied on
sharpening technology from Vollmer (https://is.gd/kahuqu) for more
than 15 years. To date, Vollmer has supplied seven machines to
the company, including models from the CP and CHP model series.
“We are currently manufacturing around 3,000 carbide-tipped
circular saw blades a month for companies across the metalworking
and woodworking industries,” says Vikas Tiwari, CEO of Basco Tool.
“Our vision is to not only increase the quality of our products and
services, but achieve further growth. We want to be producing at
least 10,000 saw blades per month within a few years.”
Employing around 20 people, Basco Tool produces over 25
variants of carbide-tipped blades for Indian manufacturers.
Vollmer machines on site include a CHP 840 and two CP 200
sharpening machines. With the former machine, carbide-tipped
circular saws can be sharpened in a single set-up. The CHP 840’s
four CNC-controlled axes allow the complete machining of all
common tooth geometries, even when sawing with an axial angle
and group toothing. The Vollmer CP 200 is equipped with
multiprocessor technology and integrated software programs.
Grinding speed can be freely selected and there is no need to set
tooth pitch or blade thickness.
Customers of Basco Tool Industries are primarily based in the
north and east of India. However, the aim is to establish additional
regional distribution and service centres and, ultimately, become
the leading manufacturer of carbide-tipped circular saws in India.
www.machinery.co.uk @MachineryTweets March 2020 57
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/kahuqu)
/www.machinery.co.uk