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박홍석(Hong-Seok Park),우펜드라 마니 툴라다르(Upendra Mani Tuladhar),신승철(Seung-Cheol Shin) 한국생산제조학회 2013 한국생산제조학회지 Vol.22 No.3
Over the past several years, many studies have been carried out in the field of 3D data inspection systems. Several attempts have been made to improve the quality of manufactured parts. The introduction of laser sensors for inspection has made it possible to acquire data at a remarkably high speed. In this paper, a robust inspection technique for detecting defects in 3D pressed parts using laser-scanned data is proposed. Point cloud data are segmented for the extraction of features. These segmented features are used for shape matching during the localization process. An iterative closest point (ICP) algorithm is used for the localization of the scanned model and CAD model. To achieve a higher accuracy rate, the ICP algorithm is modified and then used for matching. To enhance the speed of the matching process, a Kd-tree algorithm is used. Then, the deviation of the scanned points from the CAD model is computed.
박홍석(Hong-Seok Park),신승철(Seung-Cheol Shin),우펜드라 마니 툴라다르(Upendra Mani Tuladhar) (사)한국CDE학회 2014 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2014 No.2
Recently, Automobile industries are increasing their concern in adopting different ways to increase the life span of their automobiles because of the increasing problems of environmental degradation, circulation of resources and many more. Therefore interest in automotive remanufacturing technology to recycle the resources all over the world is increasing rapidly. However, the advanced countries which are active in developing remanufacturing technology are still not able to remanufacture many parts of automobiles. Such parts are still being remanufactured by small domestic enterprises through quality certification. Accordingly, in this paper the study of the processes for lower control arm core acquisition, visual inspection for the degradation of core, classification of core type, and selection of disassembly process is presented. Moreover, process for the visual inspection of the cores collected for the test are defined, classification procedure are defined in order to make manuals for the disassembly process, process for selecting appropriate disassembly method are presented and after disassembly process the defect analysis were carried out for remanufacturing process.