管件液壓成形模具設計分析

Analysis of Die Design for Tube Hydroforming

陳復國(Fuh-Kuo Chen) ； 邱黃正凱(Jheng-Kai Ciou Huang) ； 林瑞豪(Rei-Hao Lin)

《鍛造》 14卷4期 (2005/12) Pp. 28-40

https://doi.org/10.29791/Forging.200512.0004

摘要

在液壓成形製程中，成品常會有無法脹出的凹陷產生。本文針對此現象分析管件在預成形時所允許之最大凹陷量，並進一步分析模具形狀對管件凹陷量的影響。管件下料尺寸亦是影響凹陷產生與否的因素之一。因此，當決定好管件下料尺寸之後，必須特別注意管件膨脹率在5%以下的截面，此處的成形結果很可能會有凹陷產生，最後藉由不同的模具設計方式改善管件成形後的凹陷情形。
在管件液壓成形製程規劃方面，本文選取了一具有代表性的汽車結構件進行分析，由原始的彎管、預成形、到液壓成形皆建立了CAE模擬模式，並探討不同的預成形設計方式對管件最終成形之影響。本文所獲得之研究成果可提供管件液壓成形業者進行製程規劃以及模具設計時的參考。

並列摘要

This paper analyzes the maximum allowable wrinkle of the tube in the preform process and discusses the effect of die shape on the wrinkle of the tube. Another factor that influences the wrinkle is the tube size. When the tube size is determined, special attention should be paid to the section of the die at the tube expansion rate under 5%, where unexpanded hollowness happens easily. The last step is to improve the hollowness of the tube by different die designs.
In the planning of the hydroforming process, the paper analyzes a representative automobile part to build up the CAE simulation model of tube bending, preforming, and hydroforming, and discusses the influence of different preform designs on the final shape of the tube. The results of this study can be a reference for related academic research and can also be used to develop related products for industry production.