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Recently combined machine with inspection function have been studied in the manufacturing field. Integrated screw machine, a kind of combined machine, is comprised of a hole inspection unit, a tapping machine and a screw inspection unit. The automatic hole inspection unit is used to be inspected whether the holes in the supplied material are exist in the stamping process. And the automatic screw inspection unit can be inspected the failure of screw's thread or diameter of screw. In these processes, the axial compression and buckling can concur. In this study linear structural analysis of the automatic hole inspection unit was carried out with ANSYS software assuming that 1,000 N and 0.3 Nm were loaded at the end of the shaft and spindle assembly respectively. Tetrahedrons element type and patch conforming algorithm were used. For the structural stability of the units the maximum stress, deformation, and buckling load multiplier were analyzed respectively. As the results, it was known that the maximum stress and deformation of the hole inspection unit were 152 ㎫ and 26 ㎛ at the end of the shaft, and load multiplier of the unit was 2.3. On the other hand, it was known that the maximum stress and deformation of the screw inspection unit were 2.3 ㎫ at the end of shaft and 0.8 ㎛ at the spindle assembly, and load multiplier of the unit was 7,300. The magnitudes of maximum stress and deformation of the units are allowable, and buckling failure will not take place. In the result, it was known that the units had a stable structure.

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ABSTRACT
1. 서론
2. 복합나사가공 검사시스템
3. 구조해석
4. 해석결과
5. 결론
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UCI(KEPA) : I410-ECN-0101-2009-581-019509894