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11I18 IJAET0118710v6 iss6 2416 2426.pdf


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International Journal of Advances in Engineering & Technology, Jan. 2014.
©IJAET
ISSN: 22311963

Figure 2.End Milling Process

Input
Controllable independent Variables

Cutting Process

Output
Dependent
Variables

Speed, Feed
Machine

Axial depth
of cut

Type of
material

Work
piece

(Composition)

Properties
(Hardness)

End
milling
operations

Surface
Roughness

Tool geometry
Tool material
(Al - 1050)
Tool geometry
(angle, nose
radius)
Tool wear

Tool

Figure 3. Factors influencing surface finish in End milling processes

IV.

EXPERIMENTAL PROCEDURE

4.1. Design of experiment
The design of experiments technique is an important tool, which permits us to carry out the modelling
and analysis of the influence of process variables on the response variable. The response variable is an
unknown function of the process variables, which are known as design factors. There are a large
number of parameters that can be considered for machining of a particular material in end milling. In
the present study most widely used machining parameters such as cutting speed, feed rate and depth
of cut are considered as design factors. The range of values of each factor was set at three different
levels as shown in Table 1. A full factorial design is used to design factors so that all the interactions

2419

Vol. 6, Issue 6, pp. 2416-2426