快速原型機新式鋪層系統與陶瓷雷射膠化法製程設備之研發

Innovative Paving System of Ceramic Laser Rapid Prototyping Machine and Apparatus Development of Ceramic Laser Gelling

黃柏豪(Po-Hao Huang)

指導教授 ： 湯華興 ； 洪永銘

國立臺北科技大學/機電學院/機電整合研究所/碩士(2008年)

https://doi.org/10.6841/NTUT.2008.00461

摘要

本文的研究目的為研發新式鋪層系統在以陶瓷雷射燒結法為主的快速原型機台上，可改善現行製程中的漿料均勻性與現行供料裝置會使得漿料中水份下滲而導致的鋪層問題，並且可縮短製作工件的時間與減少漿料的浪費。並針對陶瓷雷射膠化法的製程開發其專用製程設備與製程參數，以達到製作純陶瓷材料工件的目的。
新式鋪層系統的第一部分為漿料循環系統設計與驗證。第二部分為分配器的設計與說明分配器研究中所得的主要設計條件與設計參數，並將供料系統與鋪層系統整合，使供料與鋪料同時進行，因此可以防止鋪層表面因鋪層時漿料水分喪失而導致生坯鋪層前後端密度不均等相關問題，並縮短製作工件的總時間。將供料用的螺旋泵輸出研究結果以公式的形式加入製程控制程式中讓供料量隨著Z軸下降量去做改變，可減少漿料的浪費。
陶瓷雷射膠化法製程與其他的製程技術在鋪層機構與製程平台有極大的差異性，所以製程設備需要重新設計與製作，再利用自製的設備去研究雷射成型參數與製作支撐所需的參數，並利用研究成果去製作純陶材材料的工件。

關鍵字

漿料 ； 分配器 ； 鋪層 ； 陶瓷雷射膠化法

並列摘要

The purpose of this research is to develop an innovative paving system, which is used in rapid prototyping equipment for the process of ceramic laser sintering. The existing feeding device, which has the problem of water infiltrating into green block before layer paving, can be improved; the time-taken of the part fabrication can be shorten, and the waste of the slurry can be reduced. Furthermore, the apparatus and process parameters of the Ceramic Laser Gelling were developed to fabricate ceramic part.
The first part of current study involves the design and testifying for a slurry circulation system. The second part discusses the design principle of a distributor and the parameters of this distributor. Eventually, the slurry distributor will be integrated into a paving device to form a new layer paving system which can feed slurry and pave a layer simultaneously. The new system can prevent the green portion from un-uniform density and shorten the time-taken for part fabrication. An equation was developed to describe the relationship between the rates of slurry delivery and pump speed. Based on the descending distance of the Z-axis, the required volume of the slurry can be obtained, and the pump speed can be determined from the equation. The result can be transferred to the system control program to achieve an optimal slurry delivery and to minimize the waste of the slurry.
Regarding the paving system, the process of ceramic laser gelling is much different from other processes; therefore, the apparatus has to be redesign and manufactured. Using the new self-made apparatus, the laser scanning parameters and supports fabrication parameters were studied. The results were employed to fabricate ceramic part.

並列關鍵字

slurry ； distributor ； paving ； ceramic laser gelling

參考文獻

[7]陳皇印，陶瓷雷射快速原型製程優化及應用，碩士論文，國立臺北科技大學製造科技研究所，台北，2006。

[2]H. H. Tang, “ Method for rapid forming of a ceramic workpiece”, US patent no 6,217,816, Apr. 2001.

[3]嚴孝全，陶瓷雷射燒結快速原型技術之研發，博士論文，國立臺北科技大學機電科技研究所，台北，2007。

[11]K. Renap and J. P. Kruth , "Recoating issues in sterolithography" Rapid Prototyping Journal, vol. 1, no. 3, 1995, pp. 4-16.

[1]Chua C.K., Leong K.F. and Lim C. S. , Rapid prototyping : principles and applications, Singapore : New Jersey : World Scientific, 2003, pp.35-53, pp.173-183, pp.193-198, pp.111-123, pp.124-132.