1. 2015/08/18ensonyu@gmail.com
國立高雄應用科技大學 模具工程系 精密成形與高速加工實驗室
National Kaohsiung University of Applied Sciences (KUAS), Department of Mold and Die Engineering
Precision Forming and High Speed Manufacturing LAB
余征諴 博士
(Enson, C-H, Yu, PhD)
善用工具 做好研究
資料收集,整理與應用
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牛頓 (Isaac Newton)
“ Pigmaei gigantum humeris impositi plusquam ipsi gigantes vident ”
“ If I have seen further
it is by standing on the shoulders of Giants ”
“如果我比別人看得更遠
那是因為我站在巨人的肩上”
巨人 = 前人研究成果
= 文獻
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The requirements of compact and integrated industrial products make it more difficult to produce
these complicated parts. The aim of this paper attempts to propose methods of finish forging die and preform
designs to produce a product consisting of a solid spur gear and cylindrical cup features. One- and two-step
forming processes were proposed and evaluated using computer-aided engineering simulations. For one-step
extrusion or upsetting processes, diameters and heights of billet were calculated using the product volume and
the corresponding cup or gear features, respectively. For two-step forming process, Tee-shaped preform
designs were proposed based on the product volume and the feature volume ratio of cup to gear; corner and
fillet arcs were adopted to modify the profile of Tee and control the material flow in the finisher die. The
forming processes of preform and finisher were analyzed using the two- and three-dimensional finite-element
method models to predict the detail characteristics of sectional material flow and the completely three-
dimensional deformation results, respectively. Experimental tests were also carried out to validate the
proposed simulation models and design methods. The forming loads, the stress and strain distributions of
forged part, and the occurrences of defects were studied and a suitable preform and corresponding die designs
were obtained. The proposed preform designs were verified via the numerical analyses for the feasibility study.
Finally, a sound gear product had been made successfully using the proposed suitable design of preform.
Abstract (original)
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■ The requirements of compact and integrated industrial products make it more difficult to
produce these complicated parts.
■ The aim of this paper attempts to propose methods of finish forging die and preform
designs to produce a product consisting of a solid spur gear and cylindrical cup features.
■ One- and two-step forming processes were proposed and evaluated using computer-aided
engineering simulations.
■ For one-step extrusion or upsetting processes, diameters and heights of billet were
calculated using the product volume and the corresponding cup or gear features,
respectively.
■ For two-step forming process, Tee-shaped preform designs were proposed based on the
product volume and the feature volume ratio of cup to gear; corner and fillet arcs were
adopted to modify the profile of Tee and control the material flow in the finisher die.
■ The forming processes of preform and finisher were analyzed using the two- and three-
dimensional finite-element method models to predict the detail characteristics of sectional
material flow and the completely three-dimensional deformation results, respectively.
■ Experimental tests were also carried out to validate the proposed simulation models and
design methods. The forming loads, the stress and strain distributions of forged part, and
the occurrences of defects were studied and a suitable preform and corresponding die
designs were obtained.
■ The proposed preform designs were verified via the numerical analyses for the feasibility
study. Finally, a sound gear product had been made successfully using the proposed
suitable design of preform.
摘要解析
問題成因
說明目的
設計方法
單/雙道次成形
分析方法
實驗及分析結果
結論
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■ 用自己的話解讀文獻
文獻回顧 (literature review)
人 事時 地物
2009年,Sheu等人,基於幾何特徵進行 2D 及 3D CAE 及實驗,評
估單道次及雙道次成形,階級齒輪之成形性;T型預成形設計之圓
弧設計可控制材料徑向及縱向流動,避免疊料缺陷發生。
Jinn-Jong Sheu,Cheng-Hsien Yu (2009) Preform and forging process designs based
on geometrical features using 2D and 3D FEM simulations, International Journal
of Advanced Manufacturing Technology, Vol.44, pp.244-254. SCI.
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Enson Style:
A. Abvabi, B. Rolfe, P. D. Hodgson,M. Weiss (2015) The influence of
residual stress on a roll forming process, International Journal of
Mechanical Sciences, Vol.101–102, pp.124-136.
APA 6th Style:
Abvabi, A., Rolfe, B., Hodgson, P. D., & Weiss, M. (2015). The influence
of residual stress on a roll forming process. International Journal of
Mechanical Sciences, 101–102, 124-136. doi:
http://dx.doi.org/10.1016/j.ijmecsci.2015.08.004
Endnote 應用 (12) 比較文獻格式
Author. (Year). Title|. [Translated Title]|. [Reviewed Item]|. Journal|, Volume|(Issue)|, Pages|. `doi:` DOI
Author (Year) Title , Journal, Vol.Volume, pp.Pages.
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