PA66長懸臂跨距支架之CAE分析

CAE Analysis of PA66 Long-Cantilever-Span Flange

劉建國(Chien-Kuo Liu)

指導教授 ： 韓麗龍

國立臺北科技大學/機電學院/製造科技研究所/碩士(2014年)

https://doi.org/10.6841/NTUT.2014.00347

摘要

長懸臂跨距支架(flange)是用於鋼琴打擊音弦系統(grand wippen)的支撐架機構。本研究嘗試使用聚醯胺(polyamide, PA)材料製作長懸臂跨距支架，藉以改善原有機構受潮造成轉動不順的問題，但是聚醯胺材料射出成型時產生翹曲變形，擬以設計澆口位置與澆口尺寸搭配減膠方法改善模具，解決塑膠成型後翹曲變形的問題。本研究採用Moldex3D CAE模流分析軟體，搭配田口方法進行優化分析，組合最適宜製程參數。
分析結果顯示，適當調整澆口位置將可控制翹曲程度，長懸臂跨距支架調整澆口位置後，從原始翹曲值0.13 mm，優化改善後的翹曲值為0.07 mm，改善率達到45%。長懸臂跨距支架優化製程之分析，以澆口位置對成品翹曲變形有最大的影響力，澆口尺寸影響力次之，減膠方法再次之。

關鍵字

長懸臂跨距支架 ； 模流分析 ； 翹曲

並列摘要

The long-cantilever-span flange is the bracket mechanism used in piano grand wippen. This research attempts to use polyamide materials (PA) to make the bracket, so as to improve the damp problem of the original design which caused to not rotate smoothly. However, the mold of polyamide material injected generates warpage. This research intends to design the gate locations and gate sizes with reducing thickness of plastic wall method to improve and solve the problem of plastic molding warpage. This study adopts Moldex3D CAE (Computer Aided Engineering) injection simulation software to do research, through Taguchi Methods to process the optimal analysis and the most appropriate combination of process parameters.
Finally, in the analysis results, adjusting the position of gate properly could control the degree of warpage. After adjusting the gate position of the long-cantilever-span flange, the value of warpage change from 0.13 mm to 0.07 mm which the improvement rate up to 45%. Locations of gate have impact on the warpage of product mostly, the influence of size of gate secondly, and the method of reducing wall thickness of plastic thirdly.

並列關鍵字

Long-cantilever-span flange ； injection simulation software ； Warpage

參考文獻

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