積層製造熔融沉積成型製程影像監控之研究

Image Monitoring Study On Fused Deposition Modeling(FDM) Fabrication Process

徐煒員(Hsu, Wei Yuan)

指導教授 ： 蔡宏營

國立清華大學/工學院/動力機械工程學系/碩士(2016年)

摘要

本研究提出一種以積層製造(Additive Manufacturing, AM)的熔融沉積成型(Fused Deposition Modeling, FDM)技術為基礎，塑料為材料的新型佈料技術的影像監控成型品質方法。

該熔融沉積成型技術主要問題在於成型過程中尚未有良好的機制檢測成型過程中產生的缺陷，以至於成型品質難以掌控。因此，本研究提出一套以影像為基礎的檢測機制，在熔融沉積成型的過程中，透過影像系統監控熔融沉積成型機台的噴嘴，以及被擠出熔融狀的材料過程中之各項影像資訊，擠出塑料的高度與寬度可以經由處理過後的影像計算得到。

在擠出料頂面與側面灰階值差異度至少百分之四的情況下，本研究由實驗結果訂定出品質標準：間隔特定幀數影像之寬度的變化百分比在二十以內，或是高度的變化百分比在四十以內；同時，長期高度與寬度的變化百分比亦能維持在上述相同變化百分比以內，便能夠稱之為正常佈料的品質。系統可以從高度與寬度上的大幅變化得知是否有異常的狀況，並達成工件品質管控的目的。

關鍵字

積層製造 ； 熔融沉積成型 ； 影像監控

並列摘要

This study proposes an image based inspection and monitoring system for a new type of Fused Deposition Modeling (FDM) technology using plastic material.

During the manufacturing process, the quality is difficult to control due to insufficient inspection methods to detect defects in the FDM processes. The quality of FDM products are difficult to be controlled. Therefore, this study proposes image-based detection mechanisms. During the process of FDM, the images of the nozzle is captured by the monitoring system. The height and the width information can be acquired by the images.

When the gray-scale value difference of adjacent surfaces of extruded material is at least four percent, a criterion can be established according to experimental result in this study. The extruded material meets the production standards when it satisfies the following conditions: the width and height variations of specific frame series should be under 20 percent and 40 percent respectively in both short and long term frame intervals, defined in this study. Monitoring systems can detect whether there are any abnormal circumstances by determining variations in both width and height from images.

並列關鍵字

Additive Manufacturing ； Fused Deposition Modeling

參考文獻

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