Study on Forging and Thread-rolling Processes of Magnesium Alloy Screws
碩士 === 國立中山大學 === 機械與機電工程學系研究所 === 99 === This study investigated effects of the process parameters on the forging load and metal flow pattern during forging and thread-rolling these two process of LZ91 magnesium alloy small size screw by the finite element analysis. At first, Compression tests were...
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ndltd-TW-099NSYS54900672015-10-19T04:03:19Z http://ndltd.ncl.edu.tw/handle/97296768369940481507 Study on Forging and Thread-rolling Processes of Magnesium Alloy Screws 鎂合金螺絲打頭及輾牙成形之研究 Kai-neng Huang 黃楷能 碩士 國立中山大學 機械與機電工程學系研究所 99 This study investigated effects of the process parameters on the forging load and metal flow pattern during forging and thread-rolling these two process of LZ91 magnesium alloy small size screw by the finite element analysis. At first, Compression tests were carried out under various forming temperatures to study the flow stress. Then, FEM software DEFORM-2D is adopted to simulate forging and thread-rolling processes of small screw to analyze the formability and parameters. In one of this study, there are two stages in forging process, and found out that up-die velocity, temperatures and friction factors will affect the product quality and appearance; on the other part, it investigated the effect of friction factor and temperature under thread-rolling process, and found out that effective stress, effective strain, metal flow and height of thread will be affected. In addition, conduct forging and thread-rolling experiments by using universal testing machine with the mold self-designed, and MoS2 of lubricant, and comparing the analytical results to verify the suitability and accuracy of FEM for forging process. Finally, according to the analysis result of this study, engineers can take it as reference. Yeong-Maw Hwang 黃永茂 2011 學位論文 ; thesis 103 zh-TW |
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碩士 === 國立中山大學 === 機械與機電工程學系研究所 === 99 === This study investigated effects of the process parameters on the forging load and metal flow pattern during forging and thread-rolling these two process of LZ91 magnesium alloy small size screw by the finite element analysis. At first, Compression tests were carried out under various forming temperatures to study the flow stress. Then, FEM software DEFORM-2D is adopted to simulate forging and thread-rolling processes of small screw to analyze the formability and parameters. In one of this study, there are two stages in forging process, and found out that up-die velocity, temperatures and friction factors will affect the product quality and appearance; on the other part, it investigated the effect of friction factor and temperature under thread-rolling process, and found out that effective stress, effective strain, metal flow and height of thread will be affected.
In addition, conduct forging and thread-rolling experiments by using universal testing machine with the mold self-designed, and MoS2 of lubricant, and comparing the analytical results to verify the suitability and accuracy of FEM for forging process. Finally, according to the analysis result of this study, engineers can take it as reference.
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author2 |
Yeong-Maw Hwang |
author_facet |
Yeong-Maw Hwang Kai-neng Huang 黃楷能 |
author |
Kai-neng Huang 黃楷能 |
spellingShingle |
Kai-neng Huang 黃楷能 Study on Forging and Thread-rolling Processes of Magnesium Alloy Screws |
author_sort |
Kai-neng Huang |
title |
Study on Forging and Thread-rolling Processes of Magnesium Alloy Screws |
title_short |
Study on Forging and Thread-rolling Processes of Magnesium Alloy Screws |
title_full |
Study on Forging and Thread-rolling Processes of Magnesium Alloy Screws |
title_fullStr |
Study on Forging and Thread-rolling Processes of Magnesium Alloy Screws |
title_full_unstemmed |
Study on Forging and Thread-rolling Processes of Magnesium Alloy Screws |
title_sort |
study on forging and thread-rolling processes of magnesium alloy screws |
publishDate |
2011 |
url |
http://ndltd.ncl.edu.tw/handle/97296768369940481507 |
work_keys_str_mv |
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