A CAD/CMM workpiece modeling system based on IGES file is proposed. Themodeling system is implemented by using a new method for labelling the tolerance items of 3Dworkpiece. The concept―'feature face' is used...A CAD/CMM workpiece modeling system based on IGES file is proposed. Themodeling system is implemented by using a new method for labelling the tolerance items of 3Dworkpiece. The concept―'feature face' is used in the method. First the CAD data of workpiece areextracted and recognized automatically. Then a workpiece model is generated, which is theintegration of pure 3D geometry form with its corresponding inspection items. The principle ofworkpiece modeling is also presented. At last, the experiment results are shown and correctness ofthe model is certified.展开更多
A 3D probe used for NC\|copying process is proposed in the paper. The construction of parallel springs is adopted in the probe. It has compact structure and little volume. By adjusting spring force and improving sensi...A 3D probe used for NC\|copying process is proposed in the paper. The construction of parallel springs is adopted in the probe. It has compact structure and little volume. By adjusting spring force and improving sensitivity, the probe can be used in CMM. Errors of the probe are analysed. Performances of the probe are verified by test of measuring force, verification of precision of single axis and plane precision.展开更多
This paper theoretically analyzes and researches the coordinate frames of a 3D vision scanning system, establishes the mathematic model of a system scanning process, derives the relationship between the general non-or...This paper theoretically analyzes and researches the coordinate frames of a 3D vision scanning system, establishes the mathematic model of a system scanning process, derives the relationship between the general non-orthonormal sensor coordinate system and the machine coordinate system and the coordinate transformation matrix of the extrinsic calibration for the system.展开更多
基金This project is supported by National Natural Science Foundation of China (No.59675083,50075064).
文摘A CAD/CMM workpiece modeling system based on IGES file is proposed. Themodeling system is implemented by using a new method for labelling the tolerance items of 3Dworkpiece. The concept―'feature face' is used in the method. First the CAD data of workpiece areextracted and recognized automatically. Then a workpiece model is generated, which is theintegration of pure 3D geometry form with its corresponding inspection items. The principle ofworkpiece modeling is also presented. At last, the experiment results are shown and correctness ofthe model is certified.
基金Supported by the National Natural Science Foundation of China (50175037)
文摘A 3D probe used for NC\|copying process is proposed in the paper. The construction of parallel springs is adopted in the probe. It has compact structure and little volume. By adjusting spring force and improving sensitivity, the probe can be used in CMM. Errors of the probe are analysed. Performances of the probe are verified by test of measuring force, verification of precision of single axis and plane precision.
文摘This paper theoretically analyzes and researches the coordinate frames of a 3D vision scanning system, establishes the mathematic model of a system scanning process, derives the relationship between the general non-orthonormal sensor coordinate system and the machine coordinate system and the coordinate transformation matrix of the extrinsic calibration for the system.
