Title: Experimental study of effect of surface roughness of blank diameter on external threads

Authors: P.S. Chauhan, K.C. Arora

Addresses: Department of Mechanical Engineering, Shri Ram College of Engineering and Management, A.B. Road, Banmore, Morena, Madhya Pradesh 476444, India. ' Department of Mechanical Engineering, Shri Ram College of Engineering and Management, A.B. Road, Banmore, Morena, Madhya Pradesh 476444, India

Abstract: This paper presents the effect of surface roughness of blank diameter on external threading when it is manufactured by thread rolling process on Sup 9A material. Sup 9A is a spring steel which is used in manufacturing of Stabiliser Bar of automobile. The work has been carried out at M/s. NHK Springs India Pvt Ltd., Malanpur on Paraga Hydraulic Circular Dies Thread Rolling Machine using HSS die and Sup 9A work piece. The effect of surface roughness of blank diameter has been studied on dimensions of threads. The results indicate that the surface roughness affect significantly the dimensions of threads, pitch circle diameter decreases when surface roughness increases and vice versa.

Keywords: surface roughness; thread rolling process; blank diameter; external threads; spring steel; automotive stabiliser bars; thread dimensions; pitch circle diameter.

DOI: 10.1504/IJMTM.2009.023955

International Journal of Manufacturing Technology and Management, 2009 Vol.17 No.4, pp.386 - 395

Published online: 22 Mar 2009 *

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