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황정호(J. H. Hwang),노지훈(J. H. Roh),정일용(I. Y. Chung),안건준(K. J. Ahn) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
In this paper, Structural analysis of co-axial grinding machine was performed to analyze the structural characteristics including bed and frame. This co-axial grinding machine is used for manufacture of ferrule, a fiber optic connector, which connect and align fiber optics cable on fiber-optic communication. Structural deformation due to self-weight and mode analysis for natural frequency were performed using ANSYS Workbench program. The structural design of co-axial grinding was changed based on the previous results of structural analysis. The results of analysis were presented to comparison of previous results. Improved design was proposed based on the previous results of analysis and it is proved the structure to be more stable than previous structure.
영상처리시스템을 이용한 피스톤 상면 결함검출에 관한 연구
황정호(J. H. Hwang),노지훈(J. H. Roh),이석우(S. W. Lee),진주경(J. K. Jin) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
The piston is an important element which converts a power in the engine parts. The external defect(crack, cavities) of piston have bad effects on the durability because the operational environment is high temperature and high pressure. We present that detecting defects and recognizing characters on the piston head using Image process system. In this paper, we describe the constitute of camera and illumination system for inspection of metallic product. Also, We develop the software which has simple algorithm and fast processing speed. It will be able to apply an automatic inspection system that it is better than the inspection being dependent on a man power in terms of error rate.
황정호(J. H. Hwang),노지훈(J. H. Roh),박기홍(Kihong Park) 한국정밀공학회 2006 한국정밀공학회 학술발표대회 논문집 Vol.2006 No.5월
Currently A demand of high precision workpiece is increasing in industry. At present, roundness measuring machine using Air bearing, coordinate measuring machine that are used from measurement station. but these machines will not be able to apply to In-line process. because of like these machine"s price are very expensive and measurement time is long. also, the complexity of conventional roundness measurement method based on fourier transform, it makes difficult to development analysis program. This work present new architecture of a Out-diameter measuring system for analysis of roundness of product. In this system, the influence of table motion errors is minimize by using two LVDT sensor and knife edge contact tip. We are produce a test machine and make an experimenter on Out-diameter of test bearing. The measurement result compared with roundness measuring machine.