| Summary: | 碩士 === 國立中央大學 === 機械工程學系在職專班 === 106 === The rocker arm bearing is mainly used in a cylinder head cam mechanism of a motorcycle engine and assumes the opening and closing functions of the valve. It plays an important role in the intake and exhaust of fuel and combustion gases in the engine. In the running of the engine, the cam will rotate constantly. The slider rocker arm was used in the past. The current method of "rolling contact" is used instead of friction. When the rocker bearing is rolling, the shaft needs to bear the collision and friction. Since the stress generation and damage often focus on the contact surface between the shaft and the needle , how to make the hardness of the shaft reach a reasonable range is the quality of the bearing and the service life of the whole bearing. Performance.
This article is feedback by customer, the product is tested with a life tester, and analysis of the distribution of the shaft hardness and the metallographic structure of the rocker bearing that is not up to specification is performed. The Taguchi method is used to analyze different high-frequency heat treatment parameters. The effects of hardness and metallography were given to simulate different heating time, quenching time, heating position, coil shape, observation period change status; this data was also established to facilitate the follow-up product development schedule.
Keywords: Rocker bearing shaft, Taguchi method, High frequency heat treatment
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