Variations in the manufacturing of Rockwell test blocks
Name
611988081-MIT.pdf
Description
Full printable version
Size
19.56 MB
Format
Adobe PDF
Checksum (MD5)
d15a7a45479f18619f023b419eeceb50
Author(s)
Vora, Jairaj Deepak
Advisor(s)
Jung-Hoon Chun.
Date Issued
2009
Publisher
Massachusetts Institute of Technology
Abstract
This research analyzes the variations occurring in the manufacturing of Rockwell hardness test blocks. Test blocks of different materials and hardness were analyzed and the variations were identified using the Ishikawa method. Random samples of 5 blocks were inspected for various parameters such as average thickness, flatness, parallelism and surface finish at each stage. These metrics were then compared and the major sources of variations were identified for different hardness and material. The major sources of variation were found to be due to non-conformance of the process plan, due to the variations in the CNC machine and due to the insufficient training of the workers. Improvements suggested in the machining plan could lead to reduction in machining time at grinding operation by as much as 13%.
Description
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2009.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 106-107).
Subjects
Mechanical Engineering.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
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copyright. They may be viewed from this source for any purpose, but
reproduction or distribution in any format is prohibited without written
permission. See provided URL for inquiries about permission.
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