Based on the results of the preliminary study on the influence of high intensity Nd: YAG laser radiation on grinding wheel constituents, an experimental set-up for dressing a grinding wheel was made. Studies were carried out to evaluate the performance of a laser dressed Al203 wheel in surface grinding under dry cutting conditions. Results confirmed the viability of this approach and indicated the existence of an optimal dressing condition for good results. © 1989 by ASME.

N. Ramesh Babu

Department of Mechanical Engineering

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

Investigations on Laser Dressing of Grinding Wheels—Part II: Grinding Performance of a Laser Dressed Aluminum Oxide Wheel

Journal of Manufacturing Science and Engineering, Transactions of the ASME

This paper covers the efforts of developing a compact dressing attachment on a cylindrical grinding machine for on-line laser dressing of wheels used in internal grinding of SAE-52100 bearing steel parts. With this attachment, alumina wheel was dressed with different conditions of dressing and its suitability for grinding was evaluated by analysing the topography on laser dressed wheel surface with scanning electron microscope and confocal laser scanning microscope. Out of these images, confocal microscopic images were found to present 3d images of dressed wheel surface. Evaluation of these images, in terms of Spk, Sk and Svk parameters obtained from bearing area curves, and their comparison with those parameters obtained from the images over diamond dressed surface, indicated the suitability of dressing leads of 0.016 mm/rev and 0.032 mm/rev for dressing of wheels with pulsed laser radiation. Effectiveness of these conditions was further established by evaluating the performance of laser dressed wheels in terms of G-ratio values, form error and finish observed on ground parts. Further, this work suggests the application of on-line imaging and analysis of laser dressed surface for quickly identifying suitable conditions of dressing of internal grinding wheels with on-line laser dressing attachment so as to make laser dressing as an economically viable process for certain critical applications. © 2019 Elsevier Ltd

Optics and Laser Technology

Role of surface topography of on-line laser dressed aluminium oxide wheel on its performance in internal grinding of bearing steel parts

In this paper, a three dimensional transient heat transfer model for predicting the 3D geometry of crater and its cross sectional profile on grinding wheel surface ablated by a single pulsed Nd: YAG laser is covered. The model considers the heterogeneity of wheel structure, the variation of energy in a pulsed laser input to the wheel, heat transfer by conduction, convection, radiation and the thermo-physical and optical properties of bond and grit while predicting the temperature distribution in the irradiated region using COMSOL Multiphysics® 5.2 package. From this temperature distribution, the shape of crater was predicted. Crater depth predicted was validated with the published results confirming the suitability of this model for predicting the shape of crater in single pulsed laser ablation of wheel surface. Post modeling analysis gives insights of the process mechanism of laser dressing and the parameters affecting the crater geometry. Future scope and implementation of this model is discussed in detail. © 2018 The Author(s). Published by Elsevier B.V.

Fulltext

Procedia Manufacturing

A Model for Predicting the Geometry of Crater on Grinding Wheel Surface Ablated with a Single Pulsed Laser

The influence of dressing feed on the performance of a laser dressed Al2O3 wheel in surface grinding under wet, plunge grinding conditions is discussed. The performance of a grinding wheel dressed with different feed rates was evaluated by means of several grinding parameters such as grinding forces, wheel wear against work material removed (G-ratio), worksurface finish and its integrity. The performance of a laser dressed wheel was compared with that of a diamond dressed wheel. Analysis of the results clearly indicated the satisfactory performance of the laser dressed Al2O3 wheel in wet grinding, especially when dressed with a feed of 0.35 mm/rev and with an intensity of 4.0 × 1010W/m2. Further, this particular analysis suggests the selection of smaller feed rates for dressing grinding wheels with a laser in order to modify the wheel surface topography considerably, so as to produce effective grinding results with laser dressed grinding wheels. © 1995.

International Journal of Machine Tools and Manufacture

Influence of dressing feed on the performance of laser dressed Al2O3 wheel in wet grinding

Investigations on the use of laser as a dressing tool for grinding wheels have been carried out and the results are reported in a two paper sequence. This paper reports the results of preliminary investigations on grinding wheel materials after laser irradiation. Studies were carried out on the surfaces of aluminum oxide (Al203), and silicon carbide (SiC) grains, vitrified bond and also on a sample Al203 grinding wheel after irradiating them with high intensity Nd:YAG laser pulses. The results obtained are discussed with reference to the optical, thermal, and mechanical properties of the materials. This paper also includes the studies on the wheel surface topography obtained after laser dressing the wheel with different dressing feed rates. © 1989 by ASME.

Journal	Journal of Manufacturing Science and Engineering, Transactions of the ASME
ISSN	10871357
Open Access	No