Abstract:
Cutting tools for metal cutting have many shapes, each of which are described by their
angles or geometries. Several types of angles are important when introducing the cutting tool's edge
into a rotating workpiece. This paper proposes the study of tool wea
r and surface finishing by applying
the positive and negative rake angle during machining.
The experiment was conducted by using
conventional lathe machine and
aluminium alloy Al6061 as the workpiece. The machining parameters
were kept constant while the
rake angles were varied from positive to negative values. At every
200mm tool travel
distance
, the flank wear and surface roughness valu
es were measured using
Microscope Motic I
mages Plus
and Handysurf surface roughness tester
respectively.
The experimenta
l
result shows that the higher the rake angle used during machining, the higher the value of the flank
wear. The surface roughness value however shows a reducing trend with the increase of rake angle.
This result can be used by machine operators to assist
them
in considering the optimum value of rake
angle
to get the best value of surface roughness with minimum flank wear
.
