An assembly method for micro parts jointing with given space angle based on projection matching

Abstract

It is difficult to assemble micro parts jointing with given space angle as the parts assembled are not on the same flat and the visual depth of microscopic vision is small, which can cause the images gathered by the microscopic vision unintelligible and feature extraction difficult. For the problem, this paper presents an assembly method of micro parts based on projection matching. It can assemble micro parts jointing with given space angle accurately. Firstly, an ideal assembly model is established as the size of the micro parts through the drawing software. Secondly, a graphics algorithm based on the primitive information from CAD is designed. Thirdly, according to the pixel value calibration and the graphics algorithm, the projection pictures are shown on the control interface. Lastly, the control method of micro parts is proposed to assemble them with given space angle. And we accomplished an assembly experiment of micro-tube and micro-column in this way, whose assembly deviation is 0.12[Formula: see text]. Experiment results indicate that the angle between two micro parts assembled can be controlled within the given deviation.