08-16-2017, 08:57 PM
Introduction
In order to analyze the roller burnishing operation on a
quantitative basis, certain observations must be made.
One of the important observations is the measurement of
components of cutting force. A dynamometer (Shaw,
1969) is used to measure forces that occur in metal
cutting or any other operation. Cutting force is one of the
parameters which play a great role in machining and for
obtaining better surface qualities like surface finish,
surface roughness and accuracy of dimensions. Hence, it
is required to measure components of cutting force (King
& Foschi, 1969) in three mutually perpendicular directions
in turning operation. In burnishing, the component of
cutting force in radial direction plays a dominant role. The
other components of forces i.e., feed component (in x
direction) and tangential component (in z direction) can
be neglected. This is because burnishing removes no
material, but it only compresses the surface. Thus, to
measure radial component of force (in y-direction), a
single component lathe tool dynamometer is designed
and fabricated for the present work. In this work, an attempt has been made to design and fabricate a new type of dynamometer to measure radial component of cutting force using strain gauges. Dynamometer is required to measure the components of cutting force in any metal cutting process. The dynamometer has been calibrated and tested for performance. It is used in roller burnishing experiment on aluminum work piece under various conditions. In roller burnishing, a hard roller is pressed against a rotating cylindrical work piece and parallel to the axis of the work piece on lathe. Optimum values of burnishing force and the corresponding surface roughness value (Ra) are obtained for different lubricant applications in roller burnishing operation. This dynamometer can be manufactured at a low cost and it can be used for tests on lathe in metal cutting laboratories and engineering colleges.
more refrence:http://indjstindex.php/indjst/article/view/29805
