| Summary: | 碩士 === 國立中正大學 === 電機工程研究所 === 89 === In recent years, Rapid Prototyping technology is known as one of the efficient procedures to improve product design so as to reduce design cycle and product costs. Slicing is an important process in whole Rapid Prototyping. It decomposes the three-dimensional computer-aided design (CAD) model into two-dimensional layer contours that can be easily built in a single deposition. The slicing method affects accuracy and the time of building the parts that are established by rapid prototyping system. In general, commercial rapid prototyping systems use traditional slicing method which slices the model in uniform layer thickness so that operators must compromise between model with fast fabrication as well as low accuracy, and slow fabrication with high accuracy by choosing thick or thin building layers. Thus, adaptive slicing needs to be performed with a view to control the accuracy of the model and to reduce the staircase effect.
The thesis is divided into two parts. In the first place, the focus of this thesis is to develop a new adaptive slicing algorithm. Based on the proposed method, the three-dimensional CAD model can be sliced into variable layer thickness automatically by detecting the change of the geometry curvature in the vertical direction of the CAD model. According to the computational slicing results, the proposed algorithm can reduce larger number of layers than uniform slicing method without reducing the model accuracy. Besides, it takes less time to slice than the ordinary slicing method. Secondly, the aim is to reform the Photo-Mask Shaping (PMS) rapid prototyping system that is developed by our research group. This research serves to improve the system architecture and the manufacturing process of the PMS rapid prototyping system so that this system can build the parts with speed and accuracy. Finally, the proposed slicing method is implemented on the PMS rapid prototyping system with efficiency.
|
|---|
