No.1（2006）1.Development of a Creep Examination Device for Machine Screw Parts using a High-temperature Strain Gauge

Yoshihiro Funayama, Mitsuo Kobayashi, Kenzo Noguchi

This report covers development of a displacement gauge for measurement while hot of elongations of machine screws due to creep, and a load cell for measurement while hot of reduction in tightening force of machine screws due to relaxation, utilizing a high-temperature strain gauge capable of measuring strains at comparatively high temperatures. Further, we developed an examination device implementing these components, for assessment of safety related to breakage and loosening due to effects of creep and relaxation of machine screws at around 300℃. Further, assessment of the performance of this examination device revealed that creep examination and relaxation examination could be performed satisfactorily.

Keywords

high-temperature strain gauge, machine screws, creep

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