ABSTRACTS, cont.

Abstracts, cont.
A study of the impact of workpiece location on machining performance of a 2-DoF PKM based machine tool
MSEC2013-1100
Abbaraju Bala Koteswara Rao, Gayatri Vidya Parishad College Of Engineering, Visakhapatnam, Andhra Pradesh, India,
Ramji K, Andhra University College of Engineering, Visakhapatnam, Andhra Pradesh, India, Sanjay Darvekar, Gayatri
Vidya Parishad College of Engineering, Visakhapatnam, Andhra Pradesh, India
This paper presents the impact of workpiece location on the machining performance of a 2 - degree of freedom
Parallel Kinematic Machine (PKM) tool. The PKM behavior is highly non-uniform and depends on the tool position
within the workspace. The structural deformation and vibration due to cutting loads affect the quality of machined
surfaces.The aim of the present study is to find the optimal tool position (workpiece location) where the workpiece
is machined to a specific quality level. End-milling operations are carried out at various locations within the
workspace and the surface roughness of machined surface (Ra) is measured at each location. A regression model
is developed to predict the surface roughness. The study shows that the workpiece location has significant impact
upon surface roughness of the machined part. Finally, a suitable workspace is defined for end-milling operation.
209 MSEC 2013 NAMRC 41