Papers by Keyword: Aero-Engine Blade

Abstract: Utilizing all-direction electrochemical machining (ECM) for super-thin twist aero-engine, feed angle of tool cathode and blade fixture angle are investigated and optimized in this study. The most optimal combination of the two angles (oblique feed angle of tool cathode and fixture angle of blade stock) is selected from all 65341 angle combinations. Moreover, the affections of the optimized angle combination on machining error distribution between blade shape and plate are concentrated. The analysis and experimental results demonstrate that the optimized angle combination can satisfy the machining requirements of blade shape and error distribution of blade shape and plate.

Abstract: This paper presents an abrasive belt grinding robotic system solution for traditional aero-engine blade manual grinding situation. In order to overcome the limitation of traditional polishing robot teaching programming way and improve the efficiency of the robot offline programming and simulation of interactive, based on OpenGL robot programming and motion simulation platform with interactive features is constructed with VC++6.0. The result shows that the system is able to realistically simulate the movement of industrial robots grinding and polishing process, and it provides a reference for the other abrasive belt grinding and polishing robot off-programming and kinematics simulation development technology.

Abstract: When we research on pneumatic performance of aero-engine blades,some functions are not solved directly in physical domain because blade coordinates are unknown,but they can be solved after being transformed to computational domain.For potential function and stream function have the orthogonality themselves,mesh of computational domain is orthogonal after orthogonal transformation and the functions are solved easily.The existence conditions are two-dimensional flow continuity equations.If fluid is irrotational and powerful flow,potential function and stream function are both usesd to describe flow field’s velocity,pressure distribution.etc.Therefore,we select potential function and stream function as basic method for researching optimization design of aero-engine blades.

Abstract: Because the process of blade in electrochemical machining(EMC) can be effected by many factors, such as blade shapes, machining electrical field, electrolyte fluid field and anode electrochemical dissolution, different ECM machining parameters maybe result in great affections on blade machining accuracy. Regard some type of aero-engine blade as research object, five main machining parameters, applied voltage, initial machining gap, cathode feed rate, electrolyte temperature and pressure difference between electrolyte inlet and outlet, have been evaluated and optimized based on BP neural network technique. From 3125 possible machining parameter combinations, 657 optimized parameter combinations are discovered. Furthermore, the final optimized ECM process parameters have been obtained. To verify the validity of the optimized ECM parameter combination, a serial of machining experiments have been conducted on an industrial scale ECM machine, and the experiment results demonstrates that the optimized ECM parameter combination not only can satisfy the manufacturing requirements of blade fully but has excellent ECM process stability.

Abstract: Because the process of blade in electrochemical machining(EMC) can be effected by many factors, such as blade shapes, machining electrical field, electrolyte fluid field and anode electrochemical dissolution, different ECM machining parameters maybe result in great affections on blade machining accuracy. Regard some type of aero-engine blade as research object, five main machining parameters, applied voltage, initial machining gap, cathode feed rate, electrolyte temperature and pressure difference between electrolyte inlet and outlet, have been evaluated and optimized based on BP neural network technique. From 3125 possible machining parameter combinations, 657 optimized parameter combinations are discovered. To verify the validity of the optimized ECM parameter combination, a serial of machining experiments have been conducted on an industrial scale ECM machine, and the experiment results demonstrates that the optimized ECM parameter combination not only can satisfy the manufacturing requirements of blade fully but has excellent ECM process stability.

Abstract: The mechanism of electrochemical finishing machining (ECFM) process was investigated. Some vital procedure parameters involving in ECFM process, such as operating voltage, electrolyte component and concentration，machining temperature, electrode gap and current density were also evaluated and optimized, and then these optimized machining process parameters were applied in ECFM experiments for promoting surface quality. In this study, two typical types of workpieces, stainless steel rod and aero-engine blade, were selected to evaluate the validity of ECFM. Furthermore, the important surface roughness characteristics before and after ECFM process such as height and spacing characteristics of surface roughness, surface waviness characteristics, surface microscopic appearance and light reflection characteristics were compared. The experiment and measurement results indicate that ECFM process can distinctly improve surface quality, eliminate the surface scratch marks and defects and reduce surface roughness.