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題 名 | 鋁輪圈低壓鑄造鋁液充填所需壓力變化模式之研究=Development of an Interactive Simulation System for the Determination of Pressure-time Relation During the Filling of Low Pressure Casting Process |
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作 者 | 郭哲豪; 許豐麟; 黃文星; | 書刊名 | 材料科學與工程 |
卷 期 | 32:2 2000.06[民89.06] |
頁 次 | 頁52-66 |
分類號 | 472.2 |
關鍵詞 | 低壓鑄造; 充填模擬; 熱傳; Low pressure die casting; Mold filling; Heat transfer; |
語 文 | 中文(Chinese) |
中文摘要 | 低壓鑄造生產過程中,鋁液充填壓力的變化模式是影響鑄件品質很重要的關鍵。最佳的充填壓力變化模式其目的在於有效的控制充填過程,減少或避免模穴內擾流或飛濺現象發生,提高鑄件的品質。因此,本研究將從電腦輔助設計及製造的觀點來輔助解決此一低壓鑄造製程上的問題。 本研究針對金屬工業研究發展中心所提供的鋁輪圈低壓鑄件為測試案例,建構可設定壓力對時間變化之低壓製程之流動解析模組。並藉由本研究所開發的低壓鑄造互動式模擬解析且在最快充填完成條件下,得到低壓鑄造層流充填,捲氣減少之條件,協助求得鑄件最少捲氣之充填壓力-時間曲線圖。 本研究所獲得的成果,可提供低壓鑄造業界泉作為設定鋁液充填壓力-時間曲線之參考,以期能減少試誤之成本,提升鑄件品質。 |
英文摘要 | An interactive computer simulation system has been developed in this study to aid the determination of pressure-time relation during the filling of low pressure casting to eliminate filling related defects while maintaining its productivity. The pressure required to fill a casting in low pressure casting process can be separated in two stages. The first stage is to exert pressure to force the molten metal to rise in the riser tube up to the gate of the casting die. The second stage is to add an additional pressure to push the molten metal into the die cavity. The pressure required in the first stage is decide by applying the Pascal’s principle and certain industrial experiences. The pressure in the second stage is rather complicated since the shape the casting is usually complex and the desired filling pattern actually depends on the shape of the individual casting. In this study, an operation principle is proposed that the casting under consideration is first divided into several parts depending on its geometric characteristics. Then the desired pattern how each individual part of this casting should be filled is determined. The pressure required to fill the die cavity can then be obtained from the simulations. The operation principles and the interactive analysis system developed are then tested on an automotive wheel made by the low pressure casting process to demonstrate how the system can aid to determine the proper pressure-time relation; pt curve, required to produce a sound casting without sacrificing its productivity. |
本系統中英文摘要資訊取自各篇刊載內容。