紫外光原型件成型技術精敏化之研究

Research in Precision and Speed of UV Rapid Prototyping Technology

陳延昌(Yung-chang Chen)

指導教授 ： 邱弘興

國立臺灣師範大學/科技學院/工業教育學系/碩士(2001年)

摘要

本研究為提高現有紫外光快速原型機(CPS-250)之精敏度，擬採兩階段來探討其最佳化的製程參數。首先針對原型機之光斑補償值、掃瞄速度、掃瞄方式及掃瞄線距等製程參數，利用田口品質工程之動態參數及允差設計，來解析其對樹脂成型速度、成型厚度及尺寸精度的影響，以獲致此設備之最佳化製程參數。
其次，改善光源同調性之試驗機，選用不同直徑的光纖、透鏡組合及樹脂種類，配合原型機的最佳化製程控制參數，來作更深入的探討，以期獲得更高精敏度的原型件。
實驗結果得知，(1)快速原型機(CPS-250)欲獲致精敏化的原型件，其最佳製程參數為水平之成型方式，0.80mm之光斑補償值，80mm/sec之掃瞄速度，層間正交之掃瞄方式及0.13mm之掃瞄線距。其中以掃瞄線距之影響最鉅。(2)使用直徑0.55mm光纖及透鏡組之試驗機，欲獲致更高精度原型件之最佳製程參數為0.80mm光斑補償值，55mm/sec之掃瞄速度，0.08mm之掃瞄線距及0.08mm之切層厚度，其中以切層厚度之影響最顯著。(3)另使用直徑0.91mm光纖之試驗機時，最佳製程參數除光斑補償值仍為0.80mm外，其餘需調整為60mm/sec之掃瞄速度，0.27mm之掃瞄線距和0.10mm之切層厚度。且以掃瞄線距影響最鉅。(4)國內化工廠提供之紫外光光敏樹脂，成型速度比原廠樹脂更可提高。

關鍵字

精敏化原型件 ； 快速原型 ； 光聚合樹脂 ； SLA ； CPS-250

並列摘要

This research had two stages to improve the precision and speed of ultraviolet rapid prototyping. First stage was to find out the optimized system parameters of existing equipment (CPS-250) and process. By employ Taguchi method to analyze system parameters such as light compensation, scan speed, scan method, and scan pitch, etc.. Second stage was to improve the quality of light source coherence. In this stage, test different combinations of optical fibers, lenses, resins and use the parameters from stage one to ensure best possible system parameters for higher precision.
The experimental results shown that the optimized system parameters for agile rapid prototyping (1) in the existing equipment were 0.80 mm light compensation, 80 mm/s scan speed, 0.13 mm scan pitch, orthogonal scanning in layers, and horizontal forming, the most important parameter was scan pitch. (2) in the diameter 0.91 mm optical fiber system were 0.80 mm light compensation, 60 mm/s scan speed, 0.27 mm scan pitch and 0.10 mm slice thickness, the most important parameter was scan pitch also. (3) in the diameter 0.55 mm optical fiber system were 0.80 mm light compensation, 55 mm/s scan speed, 0.08 mm scan pitch and 0.08 mm slice thickness, the most important parameter was slice thickness. Otherwise, the ultraviolet photoinitiator resin provided by domestic chemical factory had a better forming speed.

並列關鍵字

Precision and Speed Rapid Prototyping ； Rapid Prototyping, RP ； Photoinitator Resin

參考文獻

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Procceding of the First International Conference on Rapid Prototyping & Manufacturing, Beijing, 1998，pp.116-120。

19. S.O. Onuh and K.K.B. Hon “Application of the Taguchi Method and New Hatch Styles for Quality Improvement in Stereolightgraphy ”， Proc. Instn Mech. Engrs, Vol.122, Part B, 1998，pp.461-472。

21. J.Y. Jeng and Y.S. Wong, “Over-Curing Reduction of Parts Fabricated by the Solid Laser-Diode Plotter RP System Using the Taguchi Method”，The International Journal of Advanced Manufacturing Technology, 2001。