The Study of Free Surface On-line Measurement on Machining Center

• Main Authors: Huang,Wen Yuang, 黃文勇
• Other Authors: Chang,Ming
• Format: Others
• Language: zh-TW
• Published: 1993
• Online Access: http://ndltd.ncl.edu.tw/handle/34841075753900876917

碩士 === 中原大學 === 機械工程研究所 === 81 === The object of this study is to develop a free form surface measurement system which could measure surface profile on machining center,and use this data to rebuild the graph of the model. The program is divided into two parts, one is the execution of measuring process of free form surfaces,the other is the parameterization of smooth surface. In the measurement of free form surfaces, the data points of master surface are collected from the measurement of machining center. After cubic spline curvefitting,we can get surface normal vectors of each points. Then MP7 probe is moved to measure surface points on normal directions. At last, we construct its 3D geometry. The second part of this paper is to deal with transformation of mesh surface to parametric surface.Using the signs of Gauss curvatures and mean curvatures of each points, smooth surface can be surfacefitted by least squares method. Then we will reduce the computer memory size. This software has the fuctions of surface combination and data communication to other CAD/CAM systems which can be carried out via .dxf file.