hp tooling 2020 #1

materials & tools
Round geometry
Round inserts promote better profiling with
long overhangs in narrow grooves 10-26
Cutting tool and tooling system specialist
Sandvik Coromant is adding round geometry
(-RM) inserts to its programme of CoroCut ® QD
parting off and grooving tools. Round geometry
allows profiling with long overhangs in narrow
grooves, while further applications include external
profiling, the generation of recesses and undercuts,
and the potential to use non-linear turning
and grooving with a full radial bottom.
“The features and benefits of using round geometry inserts
with CoroCut ® QD holders include better tool life and chip
control with a rigid insert seat, internal over- and undercoolant
for improved process security and chip evacuation,
and the potential for use with a Y-axis blade,” explains Dr.
Angélica González, Global Product Manager -
Turning tools at Sandvik Coromant.
CoroCut ® QD-RM with blade
A customer case example ably demonstrates the potential
gains on offer. A shaft made from 42CrMo4 alloy
steel required grooving operations on a Niles- Simmons
N30 CNC lathe. Using a CoroCut ® QD holder with -RM
geo metry inserts in place of a competitor solution saw tool
life doubled with far better chip control. The cutting data
was identical for both tools:
290 rpm spindle speed;
160-180 m/min (525-591 ft/min) cutting speed;
0.3 mm/rev (0.012 in/rev) feed rate;
and 2.7 mm (0.079 in) axial depth of cut.
Three grades are available for the inserts. GC1125 grade
is ideal for finishing in all materials, as well as certain
roughing operations in non-ferrous metals, heat-resistant
super alloys (HRSAs) and titanium, while GC1135 grade is
first choice for roughing in stainless steel and HRSAs. Also
offered is GC4335 grade for roughing steel and cast-iron
workpieces.
The assortment is available in four insert sizes of
3, 4, 6 and 8 mm (0.008, 0.157, 0.236 and 0.315 inch).
CoroCut ® QD-RM geometry
information: www.sandvik.coromant.com
20 no. 1, 2020, March