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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
http://eprints.usm.my/40934/
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spelling my.usm.eprints.40934 http://eprints.usm.my/40934/ Measurement Of Nose Radius And Wear Of Multiple Cutting Tool Inserts From 2-D Scanned Images With Sub-Pixel Edge Detection 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 NonPeerReviewed application/pdf en http://eprints.usm.my/40934/1/LIM_TEONG_YEONG_24_pages.pdf Lim , Teong Yeong (2015) Measurement Of Nose Radius And Wear Of Multiple Cutting Tool Inserts From 2-D Scanned Images With Sub-Pixel Edge Detection. PhD thesis, Universiti Sains Malaysia.
institution Universiti Sains Malaysia
building Hamzah Sendut Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Sains Malaysia
content_source USM Institutional Repository
url_provider http://eprints.usm.my/
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
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
publishDate 2015
url http://eprints.usm.my/40934/1/LIM_TEONG_YEONG_24_pages.pdf
http://eprints.usm.my/40934/
_version_ 1643710079969525760
score 13.211869

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