於購買汽車之同時，安全氣囊已成為不可或缺之重要配備，其係由多種零組件搭配感應器組裝而成，為確保在撞擊時安全氣囊能順利發揮作用，因此在零件製造、組裝上不容許有絲毫誤差及瑕疵。以安全氣囊壓蓋為例，國內外生產製造方式不盡相同，本文主要探討在冷鍛製程條件下，將目前之加工方式，予以製程分析，達到縮減加工道次，使生產更有效率。
本研究為利用電腦輔助設計(Computer Aided Design，CAD)與電腦輔助工程 (Computer Aided Engineering，CAE)之方法，配合有限元素軟體DEFORM-3D進行安全氣囊壓蓋之冷鍛製程分析，由各道次間材料成形之等效應力、等效應變、成形力等分析結果決定道次縮減之可行性，並重新設計模具進行試鍛，最後以成品尺寸量測及硬度試驗檢測產品是否合要求，以作為相關業者或研究者之參考。

It has become more indispensable to buy automobiles without air bags equipped. Air bags are assembled by a variety of parts and sensors. In order to ensure that an air bag can play its role in an accident, no error or flaws allowed on the parts both in manufacture and assembly. Air bag pressure cap, for example, was not manufactured the same way domestically and abroad. Under this condition, this study chose to focuse on the cold forging process; aiming to reduce multistage forging process, and to make factories more efficient.
Computer-aided design (CAD) and computer-aided engineering (CAE), combined with finite element method (FEM) was used to analyze air bag pressure cap in cold forging. Using software DEFORM-3D, the material flow of effective stress, effective strain and punch load were analyzed in every process to determine the feasibility of it. If the process was plausible then tooling and stress ring were redesigned to enter the trial forging stage. At last, products will be measured and submitted to hardness test to detect whether they were up to standard.

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