In the processing of TC4 titanium alloy profile, the "peeling" defect appeared at the punching position, which led to the product being scrapped. For the reason of positioning quality problem, the failure analysis was carried out on the punching area of titanium alloy profile. Through metallographic observation and microstructure analysis, it was found that the "peeling" phenomenon in the punching area was finally located in the internal delamination defect of titanium alloy profile, which was caused by the folding during the hot deformation of profile and the extension during the further extrusion deformation. When the hole is punched, the defect is deformed by the machining force, forming a macroscopic "peeling" phenomenon.
The flapping-wing flying principle and actuator of a bird-like flapping-wing flying robot are studied. On this basis, a three-dimensional model of the seagull flapping-wing flying robot with double crank and rocker mechanism as the actuator is established, and the actuator is simulated and optimized in ADAMS software. The analysis results are consistent with the model and meet the design requirements. This paper provides a reliable reference and guidance for the theoretical research and practical model establishment of the flapping-wing flying robot.
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