The Research And Development Of Machine Center's On-Line Inspecting System Based On CAD

During the process of machining, the orientation and inspection of workpiece depend on manpower mostly. The manual inspecting has some man-made factor and its work is great, some data of quality also can't be collected. The exploitation of machine center on-line inspecting system is an imperative problem in the production practice and the critical technology to develop the system of CIMS/QAS. If automatic inspecting technology can't be solved primely, the product quality information can't be integrated. This paper based on the recent development of on-line inspection for machine center and CAD/CAM, machine center on-line inspecting system is studied thoroughly to improve the flexility, efficiency and precision of machine center. The on-line inspecting system on machining center based on CAD is introduced in this paper, include software schematic analysis and design, function and critical technology. In the Visual C++6.0 environment of the ObjectARX and MFC class libraries, graphical data are obtained by secondary development of MDT, inspecting path planning is laid and the inspecting program is made automatically. The inspecting system can be applied for automatic setting up and on-line inspecting of workpiece, and so on.Based on software engineering and the recent development of automatic programming technology, The requirement analysis, module partition and software schematic design of machine center's on-line inspecting system based on CAD and the following criticaltechnologies are studied.(1) The technology of feature recognition and data abstraction. We take the MDT as development platform, and take ARX, VC++ and MFC class libraries as development tool, make secondary development on MDT, to abstract data that inspection requires.(2) Inspecting path planning module. The path planning is the ligament between CAD and on-line inspecting system. It holds the balance in the machine center's on-line inspecting system and includes control parameter and hiberarchy of the path planning.(3) The technology of automatic programme and program integration. At last, a simple prospect for the possible applications is given.