鎂合金AZ61管材之溫間液壓股脹成形性研究

Study on Formability of Warm Hydraulic Bulging of Magnesium Alloy AZ61 Tubes

黃永茂(Yeong-Maw Hwang) ； 莊漢傑(Han-Chieh Chuang) ； 王國興(Kuo-Hsing Wang)

《鍛造》 17卷3期 (2008/10) Pp. 8-22

https://doi.org/10.29791/Forging.200810.0002

摘要

輕量化為當前汽車產業的熱門課題；管件液壓成形技術及鎂合金材料的應用，皆為當前車輛零件輕量化提供了可行的解決方案。本研究首先針對管件液壓鼓脹成形時，成形壓力與鼓脹高度之關係，最大成形壓力及成形極限進行解析。以自行設計之溫間液壓鼓脹成形試驗機及無縫擠製之鎂合金AZ61管材，進行一系列不同溫度下之液壓鼓脹實驗，探討鎂合金管材於不同溫度下之液壓鼓脹成形性。並利用本文提出之數學模式由鼓脹成形實驗結果求出管材之塑流應力曲線。接著由成形壓力及鼓脹高度關係之比較，驗證本文最大成形壓力解析模式之適用性。

關鍵字

管件液壓成形 ； 鎂合金AZ61 ； 鼓脹試驗 ； 溫間成形

並列摘要

Weight reduction is a hot topic in automotive industry. Both the applications of tube hydroforming technique and magnesium alloys offer a large potential for reducing the weight of automotive components. In this research, the relationship between forming pressure and bulge height, the maximum forming pressure and the forming limit during the tube hydraulic bulging process are first analysed. A self-designed warm hydraulic bulge forming equipment and the seamlessly extruted magnesium alloy AZ61 tubes, are used for carrying out a series of warm hydraulic bulge tests, and discussing the formalibility of the magnesium tubes at various temperatures. Furthermore, the flow stress curves are determined by the mathematical model in this paper with the bulge forming test results. Then the validity of the analytical model is verified by comparing the forming pressure and bulge height between analytical and experimental values.

並列關鍵字

tube hydroforming ； magnesium alloy AZ61 ； bulge test ； warm forming