研究生: |
薛弘翊 Hong-Yi Xue |
---|---|
論文名稱: |
LCD光固化積層製造之適應性前處理技術研究 Study of Adaptive Pre-Processing Technology for LCD based Vat-Photopolymerization Additive Manufacturing |
指導教授: |
蔡明忠
Ming-Jong Tsai |
口試委員: |
汪家昌
Jia-Chang Wang 鄭正元 Jeng-Ywan Jeng 柯正浩 Cheng-Hao Ko |
學位類別: |
碩士 Master |
系所名稱: |
工程學院 - 自動化及控制研究所 Graduate Institute of Automation and Control |
論文出版年: | 2021 |
畢業學年度: | 109 |
語文別: | 中文 |
論文頁數: | 89 |
中文關鍵詞: | 積層製造 、適應性切層 、離型位置監控 、LCD光固化技術 、適應性速度控制 |
外文關鍵詞: | Additive manufacturing, Adaptive slicing, Lifting position monitoring, LCD Vat Photo-polymerization technology, Adaptive speed control |
相關次數: | 點閱:178 下載:4 |
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現在大多數商業用光固化機台都是所使用固定層厚以及固定升降速度以及封閉系統進行控制,列印時間較為冗長且列印精度難以優化,因此本研究主要目的是在不修改其機構的前提下有效提高其列印效率以及提高列印成功率,為達到此目的必須改良層厚以及列印時間這兩部分。
因此本研究在層厚優化的部分採用適應性層厚處理,根據每層光罩切層的圖檔進行演算找出體積誤差的比例用來設定不同層厚,在列印時間的優化上本研究透過以固定面積不同照光時間找出樹脂的固化時間以及於成型平台上成型找出成型的時間做為光照時間的依據並在成型平台上加入荷重元並透過不同截面積(1mm^2~1600mm^2)的列印來進行拉力感測並藉由安全係數設定拉力安全值用來提高列印的成功率以及設定速度以達到最佳效率的列印時間並且在螺桿上加上電阻尺來進行即時的位置監控並與荷重元配合將數值回傳給主系統來避免過多的升降時間的浪費與拉力過大。結果部分透過本研究之系統進行列印三種物件,分別為雪人物件、沙漏物件、獎盃物件其截面積介於10mm^2~700mm^2,藉由不同形狀物件可以得到不同拉力與截面積的關係,其結果透過位置監控以及速度(24~120mm/min)控制可以得到比原系統的列印時間減少47%。
At present, most commercial Vat Photo-polymerization 3D Printing machines are controlled by a fixed layer thickness and a fixed lifting speed and a closed system. This results in lengthy printing time and optimization of printing accuracy. Therefore, the main purpose of this study is to improve its printing efficiency and increase the printing success rate without modifying its mechanism. In order to achieve this goal, the layer thickness and printing efficiency time must be improved.
In the part of layer thickness optimization, this research uses adaptive slicing and calculates the ratio of the volume error according to the drawing files of each layer of the mask to set different layer thicknesses. In the optimization of the printing time, this research uses a fixed area to curing at different lighting times to find out the curing time of the resin and mold on the molding platform to find the molding time as the basis for the curing time. Some samples with different slicing area (1mm^2~1600mm^2) are printed for tensile force sensing and set the lifting force safety value by the safety factor to improve the success rate of printing and set the acceleration to achieve the best efficient printing time potentiometer equipped on the screw for real-time position monitoring is need to cooperate with the load cell to return the Z position value to the main system to avoid excessive waste of lifting time and excessive lifting force. As a result, three kinds of objects were evaluated through the system of this research, namely, snow figure, hourglass, and trophy which the slicing area are from 10mm^2~700mm^2. The relationship between lifting force and slicing area can be obtained by different shapes of objects. As a result, through position monitoring and speed (24~120mm/min) control, the printing time of the original system can be reduced by 47% with a certain accuracy.
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