In this paper,the failure mechanism and cause analysis were carried out by means of simulation,perfor-mance test and microscopic observation,aiming at the abnormal fracture of the beating blade in the development of a wall breaking machine.The results show that the failure mode of the blade is fatigue fracture,and the static tensile strength and dynamic fatigue strength of the blade material meet the technical requirements.At the same time,the struc-tural design of the blade has sufficient safety factor.The high level of rivet stress in the molding process may introduce local damage to the surface near the center hole area of the blade,and then cause fatigue fracture.To this end,a specific improvement scheme is put forward,and the durability test of the newly prepared beating blade is carried out after the improvement,and the result is evaluated.
关键词
破壁机/搅打刀片/失效分析/疲劳断裂
Key words
high speed blender/beater blade/failure analysis/fatigue fracture
维普
万方数据