凸轮轴三点弯曲断裂载荷与挠度的关系研究

An Investigation on the Relationship between Breaking Loads and Deflections in Three Points Bending Test of Camshaft

使用WE-500型液压式万能拉伸试验机测定了1AE6半激冷合金铸铁凸轮轴的三点弯曲断裂载荷,研究了其三点弯曲断裂载荷和挠度之间的关系。研究表明:(1)不同炉次的凸轮轴的三点弯曲断裂载荷存在一定的分散性;(2)凸轮轴的三点弯曲断裂载荷与挠度之间存在正相关关系,凸轮轴中含有适量碳化物对其强度和挠度都是有益的。

The breaking load in three points bending test of the 1AE6 semi-chilled alloyed cast iron camshaft was determined by using WE-500 model hydraulic universal tensile test machine and thereby the relationship between its breaking loads and its defections was investigated.The result showed：（a）There was some dispersivity existing in the three point bending breaking loads of camshafts of different melting heats;（b）There was a positive correlation existing between the breaking loads and deflections,and a proper amount of carbide contained in the camshaft was beneficial to both its strength and deflection.