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Influence of preheating on performance of circular carbide inserts in end milling of carbon steel

Circular inserts have much higher tool life as compared to conventional rectangular inserts because of their capability to be indexed through small angles for repeated use. Their only limitation is high chattering tendencies due to high contact length in conjunction with small uncut chip thickness....

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Main Authors:	A.K.M., Nurul Amin, Abraham, Irwan, Nor, Khairusshima, Ahmed, Mirghani Ishak
Format:	Article
Language:	English
Published:	Elsevier 2007
Subjects:	TS200 Metal manufactures. Metalworking
Online Access:	http://irep.iium.edu.my/29563/1/2007_Influence_of_preheating_on_performance_of_circular_carbide.pdf http://irep.iium.edu.my/29563/
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spelling	my.iium.irep.295632013-06-18T05:22:06Z http://irep.iium.edu.my/29563/ Influence of preheating on performance of circular carbide inserts in end milling of carbon steel A.K.M., Nurul Amin Abraham, Irwan Nor, Khairusshima Ahmed, Mirghani Ishak TS200 Metal manufactures. Metalworking Circular inserts have much higher tool life as compared to conventional rectangular inserts because of their capability to be indexed through small angles for repeated use. Their only limitation is high chattering tendencies due to high contact length in conjunction with small uncut chip thickness. Experimental investigations were conducted to investigate the influence of preheating on performance of circular cemented carbides inserts in end milling operation of mild steel performed on vertical machining center (VMC) with rigid structure. Three TiN-coated circular cemented carbide inserts fitted on a 32 mm diameter tool were used in the experiments. Variable cutting parameters were cutting speed and feed. Depth of cut was kept constant at 1 mm. Performance of the inserts under room temperature and preheated machining was compared in terms of vibration stability, surface roughness, tool life and chip integrity. Vibration signals were recorded using an accelerometer type transducer and a Dual Channel Portable Signal Analyzer. The recorded signals were analyzed using the PULSE Labshop software. Surface roughness values were measured using a surface roughness measuring instrument-Mitutoyo Surfacetest model SJ-400. Worn tools and pitches of serrated chip teeth were studied under a scanning electron microscope (SEM). It was observed that during machining with and without preheating the main chatter frequencies remained practically constant and close to the natural frequencies of the system components while the amplitudes varied with cutting conditions. The amplitudes of chatter during preheating were found to be much lower than those during room temperature machining, as a result of which the surface roughness and tool wear were found to be much lower during preheated machining. The effect of chatter was also reflected on chip serration and segmentation. It was also observed that feed rate and cutting speed have considerable effect on surface roughness and tool wear in the cases of both hot and room temperature machining. Elsevier 2007-04 Article REM application/pdf en http://irep.iium.edu.my/29563/1/2007_Influence_of_preheating_on_performance_of_circular_carbide.pdf A.K.M., Nurul Amin and Abraham, Irwan and Nor, Khairusshima and Ahmed, Mirghani Ishak (2007) Influence of preheating on performance of circular carbide inserts in end milling of carbon steel. Journal of Materials Processing Technology, 185 (1-3). pp. 97-105. ISSN 0924-0136
institution	Universiti Islam Antarabangsa Malaysia
building	IIUM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	International Islamic University Malaysia
content_source	IIUM Repository (IREP)
url_provider	http://irep.iium.edu.my/
language	English
topic	TS200 Metal manufactures. Metalworking
spellingShingle	TS200 Metal manufactures. Metalworking A.K.M., Nurul Amin Abraham, Irwan Nor, Khairusshima Ahmed, Mirghani Ishak Influence of preheating on performance of circular carbide inserts in end milling of carbon steel
description	Circular inserts have much higher tool life as compared to conventional rectangular inserts because of their capability to be indexed through small angles for repeated use. Their only limitation is high chattering tendencies due to high contact length in conjunction with small uncut chip thickness. Experimental investigations were conducted to investigate the influence of preheating on performance of circular cemented carbides inserts in end milling operation of mild steel performed on vertical machining center (VMC) with rigid structure. Three TiN-coated circular cemented carbide inserts fitted on a 32 mm diameter tool were used in the experiments. Variable cutting parameters were cutting speed and feed. Depth of cut was kept constant at 1 mm. Performance of the inserts under room temperature and preheated machining was compared in terms of vibration stability, surface roughness, tool life and chip integrity. Vibration signals were recorded using an accelerometer type transducer and a Dual Channel Portable Signal Analyzer. The recorded signals were analyzed using the PULSE Labshop software. Surface roughness values were measured using a surface roughness measuring instrument-Mitutoyo Surfacetest model SJ-400. Worn tools and pitches of serrated chip teeth were studied under a scanning electron microscope (SEM). It was observed that during machining with and without preheating the main chatter frequencies remained practically constant and close to the natural frequencies of the system components while the amplitudes varied with cutting conditions. The amplitudes of chatter during preheating were found to be much lower than those during room temperature machining, as a result of which the surface roughness and tool wear were found to be much lower during preheated machining. The effect of chatter was also reflected on chip serration and segmentation. It was also observed that feed rate and cutting speed have considerable effect on surface roughness and tool wear in the cases of both hot and room temperature machining.
format	Article
author	A.K.M., Nurul Amin Abraham, Irwan Nor, Khairusshima Ahmed, Mirghani Ishak
author_facet	A.K.M., Nurul Amin Abraham, Irwan Nor, Khairusshima Ahmed, Mirghani Ishak
author_sort	A.K.M., Nurul Amin
title	Influence of preheating on performance of circular carbide inserts in end milling of carbon steel
title_short	Influence of preheating on performance of circular carbide inserts in end milling of carbon steel
title_full	Influence of preheating on performance of circular carbide inserts in end milling of carbon steel
title_fullStr	Influence of preheating on performance of circular carbide inserts in end milling of carbon steel
title_full_unstemmed	Influence of preheating on performance of circular carbide inserts in end milling of carbon steel
title_sort	influence of preheating on performance of circular carbide inserts in end milling of carbon steel
publisher	Elsevier
publishDate	2007
url	http://irep.iium.edu.my/29563/1/2007_Influence_of_preheating_on_performance_of_circular_carbide.pdf http://irep.iium.edu.my/29563/
_version_	1643609709218889728
score	13.211869

Influence of preheating on performance of circular carbide inserts in end milling of carbon steel

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