臺灣博碩士論文加值系統

本研究使用Deform 3D模擬7.62公厘北約彈（NATO Cartridge）之鉛銻合金拋射物之擠製成形，幾何形狀參數包括圓柱長度、圓柱厚度及底部形狀，並藉由模擬結果開發擠製模具及製成鉛銻拋射物。
由模擬結果得知，當底部具倒角設計時，需採用具銳角之沖頭，但對沖頭會產生應力集中現象並超過其材料強度，故改變其設計；當底部不具倒角設計時，拋射物即可成型，且沖頭無應力集中現象，但需後續機加工以完成其幾何形狀。以底部不具倒角設計完成成形之鉛銻合金進行後，並依後續成形需求車製拋射物端部，即可符合之鉛銻合金拋射物之幾何外形尺寸。

The 7.62×51mm NATO Cartridge was used as the carrier, and three kinds of geometrical dimensions of Pb-Sb projectiles were designed. Deform 3D was used for extrusion analysis. The results of extrusion analysis were used to design the extrusion mold of Pb-Sb projectile.
The analysis results show that the bottom of Pb-Sb projectile is chamfered, and the concentrated stress will caused the punch crack. Otherwise, the bottom is not chamfered and the Pb-Sb projectile will be successfully formed. Although, the projectile was formed, but it still need to be machined by lathe machine. After machining process, the dimension accuracy of the Pb-Sb projectile was achieved.

摘要 i
ABSTRACT ii
誌謝 iii
目錄 iv
圖目錄 vi
表目錄 vii
符號說明 viii
第一章　緒論 1
1.1 前言 1
1.2 文獻回顧 2
1.3 研究動機與目的 6
1.4 論文架構 7
第二章　彈頭之設計與製造 8
2.1 彈頭幾何外形設計理論 8
2.1.1 彈頭之設計分析 9
2.1.2 彈頭之材料種類 18
2.1.3 彈頭幾何尺寸由來 19
2.2 擠製成形之理論 20
2.2.1 擠製成形加工 20
2.2.2 擠製成形種類介紹 21
2.2.2 冷、熱擠製成形介紹 23
2.2.3 合金鋼及模具選用 24
2.2.4 補強環介紹 25
2.2.5 潤滑劑介紹 25
2.3 鉛及鉛銻合金 25
第三章　研究方法及步驟 27
3.1 研究方法 27
3.2 設備介紹 28
3.3 Deform 3D介紹 29
第四章　鉛銻拋射物之成形分析及討論 31
4.1 鉛銻拋射物設計分析 31
4.2 鉛銻拋射物幾何設計 32
4.3 成形分析 34
4.4 鉛銻拋射物成形實驗 42
第五章　結論 47
參考文獻 48

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