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我厂的某装配线上有时会出现履带板断裂现象 ,影响正常生产。经过分析 ,发现是因为履带板上的某些销孔疲劳强度有限 ,受拉力及冲击载荷作用后出现裂纹而导致履带板断裂。该履带板由 4 0Ｃｒ材料制成 ,零件形状及结构如图 1所示 :销孔铰后直径4 4 5 0 + 0 0 2 5 0 ｍｍ ,
Some assembly line of our factory sometimes appears the phenomenon of broken track shoes, affecting the normal production. After analysis, it is found that because of the limited fatigue strength of some pin holes on the track shoe, the crack occurs on the track shoe due to the crack caused by the pulling force and impact load. The track shoe made of 40Cr material, the shape and structure of the parts shown in Figure 1: pin hole hinge diameter 4450 + 0 0 2 5 0 mm,