Chatter suppression in end milling of Titanium alloy Ti6Al4V applying permanent magnet clamped adjacent to the workpiece

Chatter is an unwanted but sometimes unavoidable phenomenon in machining. The term defines the self-excited violent relative dynamic motion between the cutting tool and workpiece. Nakagawa et al. [1] stated it is meant as a problem has emerged during the endmilling of hardened steels. Campa et al...

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Main Authors:	Amin, A. K. M. Nurul, Azhari, A., Mahmud, Md. Asif
Format:	Book Chapter
Language:	English
Published:	IIUM Press 2011
Subjects:	TS Manufactures
Online Access:	http://irep.iium.edu.my/23593/ http://irep.iium.edu.my/23593/ http://irep.iium.edu.my/23593/4/chp14.pdf

id	iium-23593
recordtype	eprints
spelling	iium-235932012-09-06T03:27:19Z http://irep.iium.edu.my/23593/ Chatter suppression in end milling of Titanium alloy Ti6Al4V applying permanent magnet clamped adjacent to the workpiece Amin, A. K. M. Nurul Azhari, A. Mahmud, Md. Asif TS Manufactures Chatter is an unwanted but sometimes unavoidable phenomenon in machining. The term defines the self-excited violent relative dynamic motion between the cutting tool and workpiece. Nakagawa et al. [1] stated it is meant as a problem has emerged during the endmilling of hardened steels. Campa et al. [2] described chatter as a dynamic problem at high removal rate conditions. Chatter is undesirable due to its adverse effects on the product quality, operation cost, machining accuracy, tool life, machine-tool bearings, and machinetool life. It is also responsible for reducing output because if chatter cannot be controlled, then metal removal rates have to be lowered to eliminate chatter. Hence chatter must be avoided to improve the dimensional accuracy and surface quality of the product [3]. A system having self-induced vibrations can be said to have a negative damping [4]. In addition, Quintana et al. [5] specified that chatter can be obviously predicted from the loud noise and the poor surface integrity due to the chatter mark.The chatter phenomenon actually can be suppressed by some of methods. Nakagawa [1] showed that an end-mill with different helix angles could prevent generative chatter vibration at lower cutting speeds and was also effective in suppressing chatter vibration at higher cutting speeds. Chatter conventionally, is determined using Fast Fourier Transformation (FFT), determining whether received voice signals from a sensor are high frequency signals. The analytical and experimental identification of the chatter frequencies in milling processes and the frequency diagram are attached to the stability charts of the mechanical models. Kim et al. [6] also showed the chatter prediction method in this study. With the advancement of a chatter monitoring, the conventional FFT (Fast Fourier Transform) method was generally used. But it needs huge number of data for reliable monitoring of end-milling force. In this chapter a new method of chatter control is introduced for suppression of chatter during end milling of titanium alloy Ti6Al4V. The magnet is clamped together with the workpiece using the machine vise. Since titanium alloys are non-magnetic in nature this method could be employed. However, the strength of the magnetic field can’t be maintained uniform at all machining locations on the workpiece. IIUM Press Amin, A. K. M. Nurul Adesta, Erry Yulian Triblas Ali, Mohammad Yeakub 2011 Book Chapter PeerReviewed application/pdf en http://irep.iium.edu.my/23593/4/chp14.pdf Amin, A. K. M. Nurul and Azhari, A. and Mahmud, Md. Asif (2011) Chatter suppression in end milling of Titanium alloy Ti6Al4V applying permanent magnet clamped adjacent to the workpiece. In: Advanced Machining Towards Improved Machinability of Difficult-to-Cut Materials. IIUM Press, Kuala Lumpur, Malaysia, pp. 107-115. ISBN 9789674181758 http://rms.research.iium.edu.my/bookstore/default.aspx
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	TS Manufactures
spellingShingle	TS Manufactures Amin, A. K. M. Nurul Azhari, A. Mahmud, Md. Asif Chatter suppression in end milling of Titanium alloy Ti6Al4V applying permanent magnet clamped adjacent to the workpiece
description	Chatter is an unwanted but sometimes unavoidable phenomenon in machining. The term defines the self-excited violent relative dynamic motion between the cutting tool and workpiece. Nakagawa et al. [1] stated it is meant as a problem has emerged during the endmilling of hardened steels. Campa et al. [2] described chatter as a dynamic problem at high removal rate conditions. Chatter is undesirable due to its adverse effects on the product quality, operation cost, machining accuracy, tool life, machine-tool bearings, and machinetool life. It is also responsible for reducing output because if chatter cannot be controlled, then metal removal rates have to be lowered to eliminate chatter. Hence chatter must be avoided to improve the dimensional accuracy and surface quality of the product [3]. A system having self-induced vibrations can be said to have a negative damping [4]. In addition, Quintana et al. [5] specified that chatter can be obviously predicted from the loud noise and the poor surface integrity due to the chatter mark.The chatter phenomenon actually can be suppressed by some of methods. Nakagawa [1] showed that an end-mill with different helix angles could prevent generative chatter vibration at lower cutting speeds and was also effective in suppressing chatter vibration at higher cutting speeds. Chatter conventionally, is determined using Fast Fourier Transformation (FFT), determining whether received voice signals from a sensor are high frequency signals. The analytical and experimental identification of the chatter frequencies in milling processes and the frequency diagram are attached to the stability charts of the mechanical models. Kim et al. [6] also showed the chatter prediction method in this study. With the advancement of a chatter monitoring, the conventional FFT (Fast Fourier Transform) method was generally used. But it needs huge number of data for reliable monitoring of end-milling force. In this chapter a new method of chatter control is introduced for suppression of chatter during end milling of titanium alloy Ti6Al4V. The magnet is clamped together with the workpiece using the machine vise. Since titanium alloys are non-magnetic in nature this method could be employed. However, the strength of the magnetic field can’t be maintained uniform at all machining locations on the workpiece.
author2	Amin, A. K. M. Nurul
author_facet	Amin, A. K. M. Nurul Amin, A. K. M. Nurul Azhari, A. Mahmud, Md. Asif
format	Book Chapter
author	Amin, A. K. M. Nurul Azhari, A. Mahmud, Md. Asif
author_sort	Amin, A. K. M. Nurul
title	Chatter suppression in end milling of Titanium alloy Ti6Al4V applying permanent magnet clamped adjacent to the workpiece
title_short	Chatter suppression in end milling of Titanium alloy Ti6Al4V applying permanent magnet clamped adjacent to the workpiece
title_full	Chatter suppression in end milling of Titanium alloy Ti6Al4V applying permanent magnet clamped adjacent to the workpiece
title_fullStr	Chatter suppression in end milling of Titanium alloy Ti6Al4V applying permanent magnet clamped adjacent to the workpiece
title_full_unstemmed	Chatter suppression in end milling of Titanium alloy Ti6Al4V applying permanent magnet clamped adjacent to the workpiece
title_sort	chatter suppression in end milling of titanium alloy ti6al4v applying permanent magnet clamped adjacent to the workpiece
publisher	IIUM Press
publishDate	2011
url	http://irep.iium.edu.my/23593/ http://irep.iium.edu.my/23593/ http://irep.iium.edu.my/23593/4/chp14.pdf
first_indexed	2023-09-18T20:35:38Z
last_indexed	2023-09-18T20:35:38Z
_version_	1777409027132620800

Chatter suppression in end milling of Titanium alloy Ti6Al4V applying permanent magnet clamped adjacent to the workpiece

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