Improving the polishing process for Rockwell hardness test block
Name
611902556-MIT.pdf
Description
Full printable version
Size
6.37 MB
Format
Adobe PDF
Checksum (MD5)
8c1570dedd18b262b9ff1b9d08a83d39
Author(s)
Imani Nejad, Mohammad
Advisor(s)
Jung-Hoon Chun.
Date Issued
2009
Publisher
Massachusetts Institute of Technology
Abstract
Inefficiencies in a Rockwell hardness test block manufacturing process were analyzed. The polishing stage was identified to be the bottleneck with a high reworking rate. An understanding based on the physics of polishing was the first step. Then a DOE analysis was implemented to find the optimum parameters of polishing process. A range of solutions were implemented and improvements were observed. Adding compliance, introducing two stages of polishing and using a different pad and slurry were key elements in improving the polishing process. Various quality control factors were assessed. Early analysis of those optimized parameters appeared promising; where the average polishing cycle times for brass and steel were reduced from 20 minutes to less than 2 minutes and 4 minutes, respectively. Meanwhile the quality of surface finish was improved significantly.
Description
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2009.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 49).
Subjects
Mechanical Engineering.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
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reproduction or distribution in any format is prohibited without written
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