Measurement Of Nose Radius And Wear Of Multiple Cutting Tool Inserts From 2-D Scanned Images With Sub-Pixel Edge Detection

The nose radius of a cutting tool insert is known to affect the surface quality of the finished workpiece, machining stability, power input as well as the condition of the insert due to the direct interaction of the tool nose with the workpiece during machining. Conventional approaches for measuring...

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Main Author:	Lim , Teong Yeong
Format:	Thesis
Language:	English
Published:	2015
Subjects:	TJ1 Mechanical engineering and machinery
Online Access:	http://eprints.usm.my/40934/1/LIM_TEONG_YEONG_24_pages.pdf
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id	my-usm-ep.40934
record_format	uketd_dc
spelling	my-usm-ep.409342018-07-06T07:33:03Z Measurement Of Nose Radius And Wear Of Multiple Cutting Tool Inserts From 2-D Scanned Images With Sub-Pixel Edge Detection 2015 Lim , Teong Yeong TJ1 Mechanical engineering and machinery The nose radius of a cutting tool insert is known to affect the surface quality of the finished workpiece, machining stability, power input as well as the condition of the insert due to the direct interaction of the tool nose with the workpiece during machining. Conventional approaches for measuring the nose radius using profile projector and toolmaker’s microscope require manually selected points from the nose profile which cause inaccurate measurement of nose radius since only a few points from the sector of an imperfect circle from the nose edge are selected. A novel approach for the measurement of nose radius and wear of multiple cutting inserts using 2-D images scanned using a high resolution low-cost flatbed scanner is proposed. Investigation on the effect of scanner’s lighting conditions, tool orientation and location on the accuracy of sub-pixel edge detection of nose radii were carried out. The results of the measurement of nose radii using the scanner approach were compared with a profile projector and the variable-focus 3-D metrology system (Alicona InfiniteFocus). The polar-radius transformation method was used to calculate the projected wear area, Ap and maximum nose flank wear, VBc(max) before and after machining using images from scanner and InfiniteFocus. The measurement of the nose radii of multiple inserts yielded average error of less than 1%. The digital profile projector method yielded a highest error of about 11% in nose radii measurement. For the projected nose wear and nose flank measurement, the maximum deviation are about 6% with a slight underestimation of nose wear for scanner due to the resolution difference between the two scanning methods. Thus, the low-cost and high accuracy approach proposed in this study enables fast and accurate assessment of multiple tools and provides a new solution for tool nose inspection and wear measurement. 2015 Thesis http://eprints.usm.my/40934/ http://eprints.usm.my/40934/1/LIM_TEONG_YEONG_24_pages.pdf application/pdf en public phd doctoral Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Mekanik
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	TJ1 Mechanical engineering and machinery
spellingShingle	TJ1 Mechanical engineering and machinery Lim , Teong Yeong Measurement Of Nose Radius And Wear Of Multiple Cutting Tool Inserts From 2-D Scanned Images With Sub-Pixel Edge Detection
description	The nose radius of a cutting tool insert is known to affect the surface quality of the finished workpiece, machining stability, power input as well as the condition of the insert due to the direct interaction of the tool nose with the workpiece during machining. Conventional approaches for measuring the nose radius using profile projector and toolmaker’s microscope require manually selected points from the nose profile which cause inaccurate measurement of nose radius since only a few points from the sector of an imperfect circle from the nose edge are selected. A novel approach for the measurement of nose radius and wear of multiple cutting inserts using 2-D images scanned using a high resolution low-cost flatbed scanner is proposed. Investigation on the effect of scanner’s lighting conditions, tool orientation and location on the accuracy of sub-pixel edge detection of nose radii were carried out. The results of the measurement of nose radii using the scanner approach were compared with a profile projector and the variable-focus 3-D metrology system (Alicona InfiniteFocus). The polar-radius transformation method was used to calculate the projected wear area, Ap and maximum nose flank wear, VBc(max) before and after machining using images from scanner and InfiniteFocus. The measurement of the nose radii of multiple inserts yielded average error of less than 1%. The digital profile projector method yielded a highest error of about 11% in nose radii measurement. For the projected nose wear and nose flank measurement, the maximum deviation are about 6% with a slight underestimation of nose wear for scanner due to the resolution difference between the two scanning methods. Thus, the low-cost and high accuracy approach proposed in this study enables fast and accurate assessment of multiple tools and provides a new solution for tool nose inspection and wear measurement.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Lim , Teong Yeong
author_facet	Lim , Teong Yeong
author_sort	Lim , Teong Yeong
title	Measurement Of Nose Radius And Wear Of Multiple Cutting Tool Inserts From 2-D Scanned Images With Sub-Pixel Edge Detection
title_short	Measurement Of Nose Radius And Wear Of Multiple Cutting Tool Inserts From 2-D Scanned Images With Sub-Pixel Edge Detection
title_full	Measurement Of Nose Radius And Wear Of Multiple Cutting Tool Inserts From 2-D Scanned Images With Sub-Pixel Edge Detection
title_fullStr	Measurement Of Nose Radius And Wear Of Multiple Cutting Tool Inserts From 2-D Scanned Images With Sub-Pixel Edge Detection
title_full_unstemmed	Measurement Of Nose Radius And Wear Of Multiple Cutting Tool Inserts From 2-D Scanned Images With Sub-Pixel Edge Detection
title_sort	measurement of nose radius and wear of multiple cutting tool inserts from 2-d scanned images with sub-pixel edge detection
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Mekanik
publishDate	2015
url	http://eprints.usm.my/40934/1/LIM_TEONG_YEONG_24_pages.pdf
_version_	1747820842712039424

Measurement Of Nose Radius And Wear Of Multiple Cutting Tool Inserts From 2-D Scanned Images With Sub-Pixel Edge Detection

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