2 results listed
In this study, machinability tests were carried out on
Toolox 44 hot work tool steel (44 HRC) an important material in
developing industry. The tests were carried out dry through
milling method at four different cutting speeds (150, 180, 210, and
240 m/min), four different feed rates (0.4, 0.8, 1.2 and 1.6
mm/tooth) and at two different depth of cut (0.2 and 0.4 mm).
Cutting forces developed during milling and surface roughness of
the machined surfaces were measured. The results showed that
increasing feed rate increased the surface roughness while
increasing cutting speed decreased the cutting forces. The lowest
surface roughness value (0.533 μm) was obtained at 180 m/min
cutting speed, 0.4 mm/tooth feed rate and 0.2 mm depth of cut
while the highest one (3.126 μm) was obtained at 180 m/min
cutting speed, 1.2 mm/tooth feed rate and 0.2 mm depth of cut.
The lowest cutting force was obtained at 0.4 mm depth of cut, 0.4
mm/tooth feed rate and 180 m/min cutting speed.
International Iron & Steel Symposium
UDCS
Rüstem BİNALİ
Halil DEMİR
İbrahim ÇİFTÇİ
The most important components of the bearings are
the inner and outer bearing rings. The raceway is the most
important feature constituting the bearing rings. Grinding and
super finishing operations are applied to attain tight tolerances
and very low surface roughness in the raceway. In this study,
the effect of the cutting parameters on the cutting forces and
surface roughness in turning of the outer bearing ring raceway,
made from hardened AISI 52100 steel, was investigated by
using cubic boron nitride (CBN) cutting tool instead of
grinding. The cutting forces occurred in hard turning of the
outer bearing rings were measured using a piezoelectric cutting
force measurement unit. It was seen that the radial cutting
forces acting on the outer ring raceway were higher than the
primary forces. The feed force at the end of the raceway form
was higher than that at the start point of the form. The lowest
surface roughness was obtained at 0.04 mm/rev feed rate.
International Iron & Steel Symposium
UDCS
Mehmet BOY
İbrahim ÇİFTÇİ
Feridun Özhan