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1问题的提出我国提速货车转K2型转向架采用了折头螺栓连接形式的侧架立柱磨耗板。这些磨耗板在运用过程中发生了不同程度的裂纹故障,并且随着转K2型转向架的大量装车使用,该故障呈现上升趋势。图1为昆明北车辆段昆东站修所近期在对NX17k型车进行检修作业时所更换的具有典型裂纹
1 PROBLEM PROBLEM China’s speeding trucks turn to K2 bogies have adopted the form of folding bolts to connect the side frame column wear plates. These wear plates experienced various degrees of crack failure during operation, and the failure showed an upward trend with the heavy loading of the K2 bogies. Figure 1 for the Kunming North car section Kun East Station repair recently carried out on the NX17k vehicle maintenance operations replaced by a typical crack