하이브리드 기어의 FEM해석 및 적외선 열화상기법을 적용한 건전성 평가

Abstract

Gear from industrial society has long played an important role as one of the major mechanical components with bearings, screws. In addition to ensuring the gear power transmission to the 20th century today as efficiency favorite reduce greatly the gear for the watch hundreds of thousands of kW-class marine turbine reduction gear and deceleration devices for cars and aircraft, differential gear, wind generators, width the type also vary according to the application nor is being widely used. Rotation to the automatic transmission is often caused major defects etc. bearing, the rotating shaft, of the gear parts, in particular, the defects in the gear used for power transmission occupies a large part. Hybrid gears will occur defects such as inevitably wear, deformation, cracking due to the frequent friction error, operation steps in the processing steps. Defect in the Hybrid gear is often the cause of the load, and generates a continuous relative to the Hybrid gear and by the impact of vibration and noise a factor to accelerate the reliability, reduced durability of the whole system damage. In the overall analysis of the economic and quality of Hybrid gear by necessity hoping to be manufactured in accordance with need. With the recent rapid development of the industry there is an increasing demand for ultra-precision complex shape machining of a variety of materials. Predicting the deformation of the structure according to the various states, and a reduced accuracy due to temperature changes, and predict the deformation of the structure, shall prevent accuracy degradation as a function of temperature through the rigidity of the structure. This background, this paper carried out a finite element analysis of the Hybrid gear. First was the 3D modeling using the CATIA program to construct a finite element model, structural analysis was performed by the finite element analysis program midas fx. Hybrid gear can weaken over time, and may be followed by transformation. In accordance with aspects of the structure it was modified to obtain the specimens were prepared to experiment with a method using a thermal imaging camera with a cooled thermography technique and a halogen lamp as a heat source. With the thermography technique after cooling it was measured to be lower than the defect site other normal parts, the method using a thermal imaging camera to a halogen lamp as a heat source could see that the defective portion that is higher than other parts of the measurement. This structural analysis result that the temperature difference over the experimental part and receive large amounts of the load was found to substantially match a large part.