A Proposed Method for Error Prediction and Compensation in Hard Turning

Authors:

Manoj Nayak (Manav Rachna International University, Faridabad)

Rakesh Sehgal (National Institute of Technology, Himachal Pradesh)

Keywords: Hard Turning, Ground Surface, Machining Accuracy, Error Compensation.

Abstract:

With the advent of new cutting technologies, precision hard turning attracts great interests in automotive, roller bearing and hydraulics industry. Apart from being an environmentally friendly process, it bears enough potential to replace the grinding process. Machine tool design with improved stiffness, damping characteristics, machine-tool system rigidity, and tool-clamping system rigidity facilitates hard turning to achieve better dimensional accuracy up to ITS on the parts. But several factors affect the machining accuracy and the process reliability and hence the uncertainty about the application of the process. In this paper an analysis of the machine tool requirements to achieve the machining accuracy and the possible error driver factor both load dependent and load independent and possible error sources in a precision hard turning has been schematically represented. The strategy of on-line compensation of the dimensional errors in the process, based on the monitoring of force, acceleration and displacement of machine tool components and prediction of thermal expansion is also proposed.