搖臂軸承主要用於摩托車發動機汽缸蓋凸輪機構，承擔閥門的正常開、關功能，在發動機內燃料與燃燒氣體的進氣、排氣中起著重要作用。發動機運行中凸輪會不停轉動，以前採用滑塊式搖臂，現行使用摩擦更小的方式"滾動接觸”替代。搖臂軸承在滾動時心軸需承受碰撞及摩擦，由於應力產生與破壞常集中在心軸與滾針線接觸面，所以如何使心軸硬度達到合理範圍，是攸關品質好壞與整體軸承使用壽命之表現。 本文由廠商回饋之問題，將產品以壽命試驗機測試之，針對未達規範之搖臂軸承分析心軸硬度之分佈及金相組織之情況，以田口實驗法分析不同之高週波熱處理參數，對硬度及金相之影響，給予修正模擬不同的加熱時間、淬火時間、加熱位置、線圈形狀，觀察期變化的狀況;另將此數據建立起來，以利後續產品開發時程。 ;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
