傘形齒輪旋轉鍛造製成程有限元素分析

蕭至祥(Chih-hsiang Hsiao)

指導教授 ： 葉維磬

國立中央大學/工學院/機械工程學系/碩士(2014年)

摘要

旋轉鍛造亦稱擺輾鍛造，是一種結合滾壓和鍛造的加工方式，其成型所需負載較傳統鍛造低，並同時擁有鍛造的優點，如鍛件表面光滑、減少材料浪費與可有效降低加工時間等。本文將研究以二階段旋轉鍛造成型傘形齒輪，並利用有限元素軟體Deform-3D進行模擬分析，以3因子3水準全因子共27組模擬組數，透過回歸建立二階含交互項之多項式預測模型，求得在良好填充率下，軸向成型力峰值最小化之最佳化錐形胚料設計。

關鍵字

旋轉鍛造 ； 擺輾鍛造 ； 傘形齒輪 ； 有限元素分析

並列摘要

Orbital forging also called rotary forging, is a combination of rolling and forging processing methods, which required lower load than traditional forging. It has many advantages, such as forging smooth surface, which can effectively reduce material waste and reduce processing time and so on. This paper proposes a new procedure for forming bevel gear in two steps of rotary forging. The FEM simulation model of cold rotary forging is established under Deform-3D software environment. Regression analysis simulation results to obtain the tapered billet design optimization in minimizing the peak axial force and good fill rate.

並列關鍵字

rotary forging ； orbital forging ； bevel gear ； FEM

參考文獻

[1] Choi, S., Na, K. H., & Kim, J. H. (1997). Upper-bound analysis of the rotary forging of a cylindrical billet. Journal of Materials Processing Technology, 67(1), 78-82.

[2] Han, X., & Hua, L. (2009). Comparison between cold rotary forging and conventional forging. Journal of mechanical science and technology, 23(10), 2668-2678.

[3] Schey, J. A., Venner, T. R., & Takomana, S. L. (1982). Shape changes in the upsetting of slender cylinders. Journal of Engineering for Industry, 104(1), 79-83.

[5] Shivpuri, R. (1988). Past developments and future trends in the rotary or orbital forging process. Journal of Materials Shaping Technology, 6(1), 55-71.

[6] Decheng, Z., Shijian, Y., Wang, Z. R., & Zhenrui, X. (1992). Defects caused in forming process of rotary forged parts and their preventive methods. Journal of Materials Processing Technology, 32(1), 471-479.