| dc.description.abstract | In response to the extensive application of additive manufacturing components in defense, aerospace, and medical industries, this study proposes a robotic electrochemical mechanical polishing method. This method combines a multi-axis robotic arm with electrochemical mechanical polishing process, that could effectively and significantly reduce the surface roughness of additively manufactured titanium-based materials. The research includes system mechanism design, fixture design, electrode selection, polishing path planning, and the study of polishing parameters. Process evaluation is conducted based on surface roughness data and microstructure observations of the polished workpieces, providing a reference for establishing an efficient polishing system.
This study designs polishing electrode brushes, electrolyte supply modes, and polishing paths corresponding to the morphological characteristics of the blade workpiece. Surface polishing and refinement are performed on the complex curved surfaces of blade workpieces by controlling electrode brush with a robotic arm. Experimental analyses are discussed in detail to explore the influence of polishing path patterns and various processing parameters, such as machining current, electrode moving speed, electrode rotation speed, and polishing repetitions, on the machining characteristics of additively manufactured titanium alloy blades. Experimental results show that the developed system effectively reduces surface roughness while maintaining the geometric profile of blade workpieces. The average surface roughness of the blade workpieces decreased from Ra 25 μm to Ra 0.603 μm, with a surface roughness uniformity of 85.12%. Additionally, TEM observations of the microstructure on the workpiece surface and XPS analysis of the chemical composition of the workpiece surface revealed that, after electrochemical mechanical polishing with the developed system, a denser passivation film was formed on the workpiece surface due to the electrochemical action. This enhances the corrosion resistance of the blade material. | en_US |