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Study on three dimensional Photofabrication for Prototyping Model

原型模型三维光加工研究

基本信息

批准号：
03555022
负责人：
SAITO Katsumasa
金额：
$ 9.73万
依托单位：
Hokkaido University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1992
项目状态：
已结题

项目摘要

The results of our research are as follows :The fundamental solidification shape of photopolymer is analyzed. The solidification basic unit is evaluated for a rapid prototyping system which combines series of solidified spots to a three dimensional model.1. A fundamental analysis of solidified photopolymer shapesAs the solidification characteristics of photopolymer define solidified shapes, it is important to analyze the solidification mechanism. We developed a measurement system which enables the time and the space correspondence of the UV laser's power distribution and the solidified resin shape. An optical characteristic was also measured for photopolymer modeling.2. The evaluation of solidified shapes which produced by the combination of solidified spots.The effects of defocus of laser position were experimented about the solidified depth and surface roughness when overlapping exposure was used. The effect of hatch space hs and the ratio hs/w of laser radius w were experimented. Th … More e depth was decreased where the displacement of resin surface and focus position was bigger. The depth is longer where the overlapping ratio was smaller. Surface roughness was bigger where the overlapping ratio hs/w was smaller contrary to the mathematical prediction that the surface roughness was smaller where the hs/w was smaller.3. Design of spot transfer tool and evaluation of shape forming of the rapid prototyping systemA spot transfer tool was developed which a small amount of photopolymer was leveled with squeeze and supplied on a work exposed by UV spot light. The solidified shapes of photopolymer were evaluated which was produced by the rapid prototyping system equipped with this tool.4. The evaluation and reconstruction system for the three dimensional model shapes with non-contact measurement systemThe reconstruction system for styling models was developed which measured the model shapes and stored as data with non-contact digitizing system and reproduced Photofabrication model with three dimensional photofabrication system. Less

研究结果如下：分析了光聚合物的基本凝固形态。对将一系列凝固点组合成三维模型的快速成型系统的凝固基本单元进行了评价。固化光聚合物形状的基本分析光聚合物的固化特性决定了固化形状，因此对固化机理的分析具有重要意义。我们开发了一种测量系统，使紫外激光的功率分布与固化树脂的形状在时间和空间上对应。还测量了光聚合物建模的光学特性。凝固点组合产生的凝固形状的评价。实验了重叠曝光时激光位置离焦对固化深度和表面粗糙度的影响。实验了舱口间距hs和激光半径w的比值hs/w的影响。树脂表面位移和焦点位置越大，深度越小。重叠比越小，深度越长。与数学预测的hs/w越小表面粗糙度越小相反，hs/w越小表面粗糙度越大。研制了一种将少量光敏聚合物挤压平整并在紫外聚光灯下照射的工件上提供的光斑转移工具。利用该工具制备的快速成型系统对光聚合物的固化形状进行了评价。开发了造型模型重建系统，利用非接触式数字化系统测量模型形状并将其作为数据存储，利用三维光电加工系统再现造型模型。少