Abstract:
Micro-milling is the most emerging machining process nowadays. Because it just not
possibly makes the two-dimensional and three-dimensional shapes of material but it can
also manufacture various types of engineering materials. In industries the use of microlevel
parts is increasing very rapidly so that is why micro machining is most needed
machining type. Micro milling is mostly used micro machining type because of its accuracy
in machining, greater surface finish and it can also give greater material removal rate. Other
than that this process is preferably good because of its process flexibility in machining of
miniature parts. While in selection of workpiece material this process also has no
limitations.
This study is intended to focus on the micromachining of aerospace material alloys.
Mostly used materials are titanium alloys and nickel based super alloys. Widely used
aerospace material is titanium alloy of Ti6Al4V as it has greater strength to weight ratio,
good corrosion resistance and it is good for high temperature application. But titanium
alloys are is very difficult to machine due to their lower elongation to break ratio and very
poor thermal conduction.
Micro level of machining becomes more difficult. Although it gives greater accuracy
but some difficulties becomes more prominent at this level. There are many problems
during this machining process which are needed to be covered. These are the burr formation
and surface finish of workpiece and most importantly tool life which means focus on its
wear. In these problems our center of attention is the burr formation and surface roughness
of workpiece. In this research to analysis percentage contribution of parameters effecting
the surface quality, the statistical analysis method ANOVA is used.
