轧机AGC伺服液压缸缸底疲劳损坏分析与改善

Research on Fatigue Failure of AGC Servo Hydraulic Cylinder

针对某轧机AGC伺服液压缸在工作中发生疲劳破坏、产生裂纹的问题,通过工况分析、力学建模、仿真分析,得出该缸发生疲劳破坏的原因,并通过增加缸筒、缸底厚度,增大缸底砂轮越程槽圆弧半径等结构优化,降低了危险区域的应力,有利于改善AGC液压缸的疲劳寿命。

Fatigue damage,cracks occurred in work process of a rolling mill AGC servo hydraulic cylinder. Through working condition,mechanical modeling and simulation analysis,the cause of fatigue damage was concluded. Through increasing the thickness of the cylinder barrel and cylinder bottom and increasing the radius of the grinding wheel groove at the cylinder bottom,the maximum stress had fallen sharply,and the fatigue life of the AGC hydraulic cylinder was improved.