Die Design for Hot Extrusion of Magnesium Alloy Gears
碩士 === 國立中山大學 === 機械與機電工程學系研究所 === 99 === This study is to analyze and test the extrusion process of a hollow spur gear and a solid helical product with magnesium alloy. In the hollow spur gear part, firstly, a design criterion to determine the forming parameters is proposed. Then, the Finite Elemen...
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ndltd-TW-099NSYS54900772015-10-19T04:03:35Z http://ndltd.ncl.edu.tw/handle/03906116458541943875 Die Design for Hot Extrusion of Magnesium Alloy Gears 鎂合金齒輪熱間擠製之模具設計 Sung-Hsiu Lin 林松秀 碩士 國立中山大學 機械與機電工程學系研究所 99 This study is to analyze and test the extrusion process of a hollow spur gear and a solid helical product with magnesium alloy. In the hollow spur gear part, firstly, a design criterion to determine the forming parameters is proposed. Then, the Finite Element Analysis is used to simulate the flow pattern of the billet from separating channel, welding chamber to die bearing part. From a series of simulation results, the effect of separating channel length, mandrel entrance angle, welding chamber height, etc. on the radial filling ratio, welding pressure, extrusion load, etc. are found. By using the Taguchi Methods, we can find the most important parameters. Finally, a better die geometry is designed to obtain a sound product. In the helical product part, the Finite Element Analysis is used to get the understandings of radical filling ratio of magnesium alloy in the helical zone. Then, a better die geometry is designed from the results of analyses. Finally, hot extrusion experiments of a hollow spur gear and a solid helical product are conducted. The experimental values of the extrusion load and the product’s dimension are compared with the analytic values to verify the validity of the analytic models. Yeong-Maw Hwang 黃永茂 2011 學位論文 ; thesis 85 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 is to analyze and test the extrusion process of a hollow spur gear and a solid helical product with magnesium alloy. In the hollow spur gear part, firstly, a design criterion to determine the forming parameters is proposed. Then, the Finite Element Analysis is used to simulate the flow pattern of the billet from separating channel, welding chamber to die bearing part. From a series of simulation results, the effect of separating channel length, mandrel entrance angle, welding chamber height, etc. on the radial filling ratio, welding pressure, extrusion load, etc. are found. By using the Taguchi Methods, we can find the most important parameters. Finally, a better die geometry is designed to obtain a sound product. In the helical product part, the Finite Element Analysis is used to get the understandings of radical filling ratio of magnesium alloy in the helical zone. Then, a better die geometry is designed from the results of analyses.
Finally, hot extrusion experiments of a hollow spur gear and a solid helical product are conducted. The experimental values of the extrusion load and the product’s dimension are compared with the analytic values to verify the validity of the analytic models.
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author2 |
Yeong-Maw Hwang |
author_facet |
Yeong-Maw Hwang Sung-Hsiu Lin 林松秀 |
author |
Sung-Hsiu Lin 林松秀 |
spellingShingle |
Sung-Hsiu Lin 林松秀 Die Design for Hot Extrusion of Magnesium Alloy Gears |
author_sort |
Sung-Hsiu Lin |
title |
Die Design for Hot Extrusion of Magnesium Alloy Gears |
title_short |
Die Design for Hot Extrusion of Magnesium Alloy Gears |
title_full |
Die Design for Hot Extrusion of Magnesium Alloy Gears |
title_fullStr |
Die Design for Hot Extrusion of Magnesium Alloy Gears |
title_full_unstemmed |
Die Design for Hot Extrusion of Magnesium Alloy Gears |
title_sort |
die design for hot extrusion of magnesium alloy gears |
publishDate |
2011 |
url |
http://ndltd.ncl.edu.tw/handle/03906116458541943875 |
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