以有限元素法與反應曲面法分析加工路徑對傘齒輪之旋轉鍛造最佳化設計之影響

趙龍清(Long-Cing Jhao)

指導教授 ： 葉維磬

國立中央大學/工學院/機械工程學系/碩士(2015年)

摘要

本文將利用有限元素軟體Deform-3D進行模擬分析，研究上模具運動路徑為行星及螺旋軌跡之旋轉鍛造傘形齒輪，並採用六因子三水準Box-Behnken實驗設計，透過迴歸分析建立二階多項式預測模型，求得齒輪在良好填充率下，應變均勻度最小之最佳化解。結果顯示品質特性之預測模型具有精確度；初步研究最佳化結果顯示行星軌跡優於螺旋軌跡。

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

In this paper, the FEM simulation model of cold rotary forging is established under Deform-3D software environment. the upper die motion path is a planetary and spiral on cold rotary forging of a spur bevel gear. Using the Box-Behnken design of experiment, through the regression analysis to build a prediction model of second-order polynomial function. Regression analysis simulation result to obtain gears at the optimization in minimum equivalent strain coefficient of variance and good filling rate.As a result, the prediction model of quality characteristics is accurate. A preliminary study showed the best result that planetary better than spiral.

參考文獻

[3]D. Zhou, S. Yuan, Z. R. Wang and X. Zhenrui, "Defects caused in forming process of rotary forged parts and their preventive methods," vol. 32, no. 1, pp. 471-479, 1992.

[5]J. A. Schey, T. R. Venner and S. L. Takomana, "Shape changes in the upsetting of slender cylinders," Journal of Engineering for Industry, vol. 104, no. 1, pp. 79-83, 1982.

[6]R. Shivpuri, "Past developments and future trends in the rotary or orbital forging process," Journal of Materials Shaping Technology, vol. 6, no. 1, pp. 55-71, 1988.

[7]L. Hua and X. Han, "3D FE modeling simulation of cold rotary forging of a cylinder workpiece," Materials & Design, vol. 30, no. 6, pp. 2133-2142, 2009.

[8]X. Han and L. Hua, "Effect of size of the cylindrical workpiece on the cold rotary-forging process," Materials & Design, vol. 30, no. 8, pp. 2802-2812, 2009.