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Shunmugam M S
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Shunmugam M S
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Shunmugam M S
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Shunmugam, M. S.
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9 results
Now showing 1 - 9 of 9
- PublicationComputation of the three-dimensional envelope for roughness measurement(01-01-1974)
; Radhakrishnan, V.In practice, the instruments measuring according to the E-system refer to a three-dimensional envelope as the measurement is carried out by means of two styli, one a sphere and the other a normal tracing stylus. In this paper, the computational approach to the two-dimensional envelope is reviewed and the extension of the same method to compute the three-dimensional envelope is explained with reference to two-dimensional profiles obtainable with single stylus instruments. © 1974. - PublicationAn analysis of the reference lines of the surface profile and its true replica(01-01-1976)
; Radhakrishnan, V.The roughness of surfaces normally not accessible by conventional stylus instruments is often measured by a replica technique. The replica surface is the mirror image of the original surface. This paper deals briefly with an analysis of the reference lines used in practice for roughness measurements from surface profiles of original as well as replica surface. A statistical analysis of surfaces produced by different processes and of their true replicas is reported. © 1976. - PublicationOptimizing workpiece position in centreless grinding by roundness profile analysis(01-01-1987)
;Subramanya Udupa, N. G.; Radhakrishnan, V.Selection of optimum setting in centreless grinding is based on the roundness error obtained. However, the roundness profile can be characterized in many ways, including mean line average height and harmonic analysis. In this paper, an approach based on a detailed analysis of the roundness profile is suggested. Theoretical and experimental results are presented. © 1987. - PublicationPROCESS MONITORING IN CENTRELESS GRINDING FOR OUT-OF-ROUNDNESS AND SURFACE FINISH CRITERIA.(01-12-1986)
;Udupa, N. G.Subramanya; Radhakrishnan, V.Selection of optimum conditions in centreless grinding is based on the roundness error and surface finish which are post-process measurements. In-process measurement of the roundness error and surface finish, because of its complexity, has hardly been attempted in centreless grinding. But monitoring of some of the process parameters during grinding can be done to control the quality of the ground parts. In this paper, the influence of some of the process parameters on the quality of the ground parts is brought out and how monitoring of these parameters can lead to the optimum conditions is discussed. Experimental work carried out in this connection is reported. - PublicationWORKPIECE MOVEMENT IN CENTERLESS GRINDING AND ITS INFLUENCE ON QUALITY OF THE GROUND PART.(01-01-1988)
;Subramanya Udupa, N. G.; Radhakrishnan, V.The grinding action and the rounding mechanism are highly complex in centerless grinding. The process geometry and the dynamic stability of the workpiece are critical factors affecting the quality of the ground parts. The workpiece, because of floating condition, has an inherent tendency to become unstable during grinding. This is particularly true in the case of hollow workpieces like bearing races, bushes, cylinder liners, etc. In this paper, an attempt has been made to investigate the dynamic instability of the workpiece and to identify its effects on the quality of ground parts in infeed grinding. The details of the experimental investigations carried out to measure the horizontal and vertical movements of the workpiece directly on the machine are included. Some measures to minimize the vertical movement of the workpiece and to improve the quality of the ground part are also discussed. - PublicationThree-dimensional geometric analysis of the plunge centreless grinding process(01-01-1987)
;Udupa, N. G.Subramanya; Radhakrishnan, V.The grinding action and the rounding mechanism are highly complex in centreless grinding. The axis of the workpiece not only moves laterally but also tilts during the grinding process. Rowe and Barash have developed a two-dimensional model for an infeed centreless grinding neglecting the tilt of the workpiece. In this paper, an attempt has been made to develop a simulation model which incorporates the tilt of the workpiece. The theoretical and experimental investigations have been carried out with workpieces having specific geometries and the results are discussed. © 1987, Institution of Mechanical Engineers. All rights reserved. - PublicationFrictional behaviour and its influence on quality in centreless grinding(01-08-1987)
;Udupa, N. G.Subramanya; Radhakrishnan, V.In centreless through feed grinding the quality of the ground parts is influenced by several process variables. Some of these process parameters alter the frictional conditions at the control wheel-workpiece and the grinding wheel-workpiece interfaces which, in turn, influence the axial feed rate and rate of rotation of the workpiece. In addition, the type of cutting fluid plays an important role in determining the friction at the control wheelworkpiece interface. In this paper, an attempt is made to describe the influence of some of the process parameters on the slip in the axial movement and the change in the rate of rotation of the workpiece. Also the influence of different cutting fluids, which alters the nature of the frictional contact at the control wheel-workpiece interface, on the workpiece movements and quality of the ground parts is described. The experimental work carried out, in connection with this, is included. Further, from the analysis of the experimental results some useful conclusions have been derived which would be helpful in improving the performance of the process. © 1987. - PublicationComparison of different methods for computing the two-dimensional envelope for surface finish measurements(01-01-1976)
; Radhakrishnan, V.In the envelope system of surface finish measurement, an envelope traced by a circle of definite radius gives the reference line for a two-dimensional surface profile. Geometrical construction of this envelope, on actual surface profiles, is fairly easy. For evaluating the benefits of the E-system it is advantageous to use digitized surface profiles, to compute the envelope from the profile ordinates. There are several ways of computing the envelope from digitized surface profiles and this paper explains the various methods and gives the times taken for computation. © 1976. - PublicationWorkpiece movement in centerless grinding and its influence on quality of the ground part(01-01-1988)
;Udupa, N. G.Subramanya; Radhakrishnan, V.The grinding action and the rounding mechanism are highly complex incenterless grinding. The process geometry and the dynamic stability of the workpiece are critical factors affecting the quality of the ground parts. The workpiece, because of floating condition, has an inherent tendency to become unstable during grinding. This is particularly true in the case of hollow workpieces like bearing races, bushes, cylinder liners, etc. In this paper, an attempt has been made to investigate the dynamic instability of the workpiece and to identify its effects on the quality of ground parts in infeed grinding.The details of the experimental investigations carried out to measure the horizontal and vertical movements of the workpiece directly on the machine are included. Some measures to minimize the vertical movement of the workpiece andto improve the quality of the ground part are also discussed. © 1988 by ASME.