Failure Mode and Damage Evolution of Peristaltic Pump Hose for Magnetorheological Polishing
The peristaltic pump hose recovery system is one of the key components in the magnetorheological polishing fluid circu-lation system.The performance of the system directly affects the stability of the polishing fluid transportation.In order to ensure the reliability of continuous magnetorheological polishing process,the failure mode and damage evolution of peristaltic pump hose for magnetorheological finishing is studied in this paper.First,the failure mode of the peristaltic pump hose is analyzed,the force model is established and simulated,and the vulnerable position of the hose is gained.Then,the situation of section damage in the failure position is observed through experimental method,the feature of the damage crack is analyzed,and the maximum depth of crack is taken as the characterizing parameter to study the development law of damage.Finally,the off-line life prediction mod-el of the peristaltic pump hose is established according to experiments.Results indicate that,The hose wear process has three stages(running-in wear stage,stable wear stage,severe wear stage)under the condition of rotation speed of 300rpm using convention-al cerium oxide polishing Fluid.The replacement of the peristaltic pump hose is predicted to be in 16h,which is consistent with the actual situation,and the proposed model shows a strong guiding significance.
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