Abstract
Shot blasting is an important means of metal surface treatment, and the fracture of rotating blade is the main reason for the abnormal operation of shot blasting machine. In order to prolong the service life of the equipment, the dynamic fatigue characteristics of the blade are studied in this paper. A three-dimensional model of the blade is established and its constraint modal are analyzed by both simulation and experiment. The results show that the deformation of blade is proportional with the increase of natural frequency, and the stress concentration is easy to occur at the root of blade. Meanwhile, the dynamic fatigue test of the blade is carried out, and it can be found that the root of the blade breaks at the rotational speed of 750r/min, which verifies the correctness of simulation results. Therefore, it is necessary to effectively adjust the control speed to ensure the normal rotation of the blades and reliable operation of the machine.
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