Development of new strategies for GD&T and machine performance inspections

Name: iriluk Phankhoksoong

LCSH: Kasetsart University -- Dissertations. D.Eng. (Mechanical Engineering) 2017

Classification :.LCCS: TJ233

LCSH: Kasetsart University. Department of Mechanical Engineering -- Dissertations

LCSH: Machine design

LCSH: Tolerance (Engineering)

Abstract: This research presents a new method for the development of strategies for validating the performance of CNC vertical machining center spindle (VMCs) with double ball-bar testing tools with no load according to ISO230-4 standards to determine the appropriate position in the work piece production. This research also presents a new strategy for measuring geometric dimensioning and tolerancing (GD & T). It is a case study of the flatness tolerance of a feature on size A-160 AA5083 aluminum work pieces according to ISO 10791-7 standards to determine the appropriate points for the statistical number of sampling point by calculating the number of waves from the circular motion of the double ball-bar. The work piece quality was verified of with coordinate measuring machine (CMM). From the results of the study, it was found that of all 15 positions to prevent vertical machining center spindles (VMCs) milling machine movement on the table, the A1 position was found to be not measurable because it is a position for machine sensor placement. Other positions yielded different deviations. The worst and best positions are B5 and A4, respectively. Finally, the results from determining the number of sampling points for measuring the tolerances of the plane at 90% and 95% confidence tests on 72 and 150 points respectively, the accuracy was greater than 95%. The test that was done at the 9 points that was recommended by BS7172: 1989 standard yielded no more than 35% accuracy. The prediction of the number of sampling points in the quality measurement of the work piece significantly depends on the machine performance.

Kasetsart University. Office of the University Library

Address: Bangkok

Email: tdckulib@ku.ac.th

Name: Chatchapol Chungchoo

Role: Thesis Advisor

Name: Anchasa Pramuanjaroenkij

Role: Thesis Co-Advisor

Name: Tawee Ngamvilaikorn

Role: Thesis Co-Advisor

Created: 2017

Modified: 2023-06-28

Issued: 2023-06-28

วิทยานิพนธ์/Thesis

application/pdf

URL: https://kasetsart.idm.oclc.org/login?url=https://www.lib.ku.ac.th/KUthesis/2560/siriluk-pha-all.pdf

CallNumber: TJ233.S57

eng

DegreeName: Doctor of Engineering

Level: Doctoral Degree

Descipline: Mechanical Engineering

Grantor: Kasetsart University

©copyrights Kasetsart University

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