| Propeller is the most important component of propulsion system in ship and marine equipment, any defects in design and manufacture will lead to lower work efficiency, lower reliability, even lower fatigue life. Based on the three dimensional(3D) geometry modeling, the researches and optimization related to the processing technology and the machining path planning of propeller blade are urgently needed to carry out. Thus, the machining efficiency and quality of the propeller blade can be improved.Base on the modeling principle of free-form surface, the design parameters, geometric characteristics and calculation methods of data points for propeller blade were studied. Based on UG, an automated modeling module for propeller blade was developed, which realizes the propeller blade parametric modeling. Three mainstream surface fitting methods were adopted in this module, which can be separately used to establish the propeller blade 3D model. The computational fluid dynamics(CFD) software FLUENT was used to analyze hydrodynamic performance of these modeling.Based on UG machining module, the propeller milling template was designed and machining experiments have been carried out. Based on the NC milling dynamical model and the flutter stability model, the propeller numerical control(NC) machining process were analyzed and the axial cutting depth of propeller surface milling was optimized. Then, robot grinding trajectory optimization module was also developed by solving robot forward and inverse kinematics. Finally, the propeller NC machining path planning module was developed by using UG secondary development technology.In this research, the software modules development of Marine propeller geometry modeling, NC machining, robot grinding was completed. And the establishment of integrated platform for Marine propeller design, machining, manufacturing was preliminary realized, which can be used to improve the machining efficiency and quality of propeller blade. |
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