粉末冶金螺旋齒輪模具設計與驗證;The Design and Verification of Helical Gear Mold by Powder Metallurgy

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题名:	粉末冶金螺旋齒輪模具設計與驗證;The Design and Verification of Helical Gear Mold by Powder Metallurgy
作者:	賴柏方;Lai,Po-Fang
贡献者:	機械工程學系
关键词:	粉末冶金;螺旋齒輪;油壓系統;磨耗;powder metallurgy;helical gear;hydraulic systems;wear
日期:	2016-02-24
上传时间:	2016-03-17 20:49:35 (UTC+8)
出版者:	國立中央大學
摘要:	本論文之目的為改良現有粉末冶金螺旋齒輪模具機構設計，粉末冶金螺旋齒輪模具因模具間摩擦過大，使得模具壽命過短，故本論文為解決粉末冶金螺旋齒輪模具因摩擦導致模具壽命過短之問題。本論文利用主動驅動模具旋轉之方式來解決模具摩擦過大的問題，提出利用油壓系統結合模具旋轉運動關係，使模具可透過油壓方式產生旋轉，增加模具之壽命。本論文共設計出兩種不同形式的機構，分別利用撓性傳動及撓性與剛性結合之傳動模式，設計並製作出實體，透過實驗驗證找出問題。為了比較傳統設計與新型設計之差異，本論文設計一個實驗測試平台，模擬實際粉末冶金成型機之上冲與中模之運動關係，並結合本論文之新型粉末冶金螺旋齒輪模具設計與傳統設計。實驗內容主要為量測上冲與中模因實際壓合過程中所產生之磨耗，並比較兩者磨耗之差異。實驗結果數據顯示新型模具設計之磨耗情形明顯優於傳統模具設計，累積磨耗量低於傳統模具設計50%以上，使得模具壽命提升2倍以上。另外，不考慮額外驅動設備成本，新型模具之製造成本較傳統模具低。綜合上述實驗結果，確認本論文所設計製作之新型粉末冶金螺旋齒輪模具可取代傳統模具設計。 ;The purpose of this paper is to improve the existing mechanism of powder metallurgy helical gear mold design. The helical gear mold of powder metallurgy due to excessive friction between the molds so that the mold life is too short. This paper is to solve the short life problem of helical gear mold of powder metallurgy that due to the friction. In this paper, the use of actively driving the rotation of the mold to solve the problem of excessive friction of the mold. Proposed the use of a hydraulic system combines rotary motion relationship of the mold. The mold can be generated by hydraulic rotary and increasing the life of the mold. This thesis designed two different forms of mechanism. Namely the use of flexible transmission drive mode and the flexible and rigid coupling. Design, manufacture and identify the problem through experimental verification. To compare the difference between traditional design and new design, design an experimental test platform to simulate the relationship with the movement of the top punch and the mold of the powder metallurgy molding machine. Then the experimental test platform combined with the new design and traditional design. The experiment is to measure the wear by friction, and compare the difference between the two designs. The experimental results show the wear of the new mold design is better than traditional mold design. The cumulative amount of wear of the new mold design is lower than 50% or more of the traditional mold design. The new mold design enhance the life of more than 2 times. In addition, without considering the additional cost of driving, the manufacturing cost of the new mold is lower than the traditional mold. The above results confirm this thesis designed the new helical gear mold of powder metallurgy can replace the traditional mold design.
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