Research On The Design Of Generative Design Quadcopter And Formed By Selective Laser Melting Processing

Selective laser melting,as one of the important development directions of additive manufacturing technology,can directly form hollow lattice,curved cavity,integrated components and other light components,with good forming accuracy.The use of lightweight structures combined with lightweight materials can further optimize the quality of components.Ti6Al4 V is a kind of light alloy material.In the process of selective laser melting,laser periodic scanning will lead to the directional growth of the formed parts,which makes the structure have a certain anisotropy.This characteristic is of positive significance for strengthening the bearing capacity of the structure with single load direction.In order to study the effect of anisotropic materials on strengthening the bearing capacity of structural parts with a single load direction,this paper takes the process of selective laser melting forming of the fuselage structure of quadcopter aircraft with generative design as the research object,and mainly studies four parts:Firstly,the generative design theory,including the generative design process and topology optimization algorithm,was studied.The generative design of the fuselage structure of the quadcopter was carried out.The lightweight structure that met the design requirements was obtained by finite element analysis.Second,in order to get less forming defects of aircraft fuselage structure,studied the forming process of keyhole and did not melt powder,defects such as hot crack,spheroidizing,warp,the mechanism of laser power and scanning speed is studied through experiments of district forming a densification behavior and the effect of laser melting and obtained with smaller forming defects forming process;Thirdly,in order to obtain the aircraft fuselage structure with enhanced bearing capacity,the influence of scanning strategy and scanning rotation Angle on the anisotropy of the aircraft forming process was studied through experiments on the basis of dense technology.Statistical methods such as analysis of variance were used to analyze the significance of the process on the anisotropic strength.At the same time,the mechanism of material anisotropy was revealed by means of metallographic structure,fracture morphology and other evaluation methods,and the forming process with significant anisotropy was obtained.Fourth,study the aircraft fuselage gen into four axis type design structure in the constituency laser forming is put in front of the melt,support,the support less quantity,forming fast,and conform to the placement of anisotropic direction load strengthening support,and use a high density of anisotropic forming process on the structure,the load experiments measured its load capacity is increased significantly,to verify the effectiveness of the anisotropic reinforcement.The research results provide a theoretical basis for the anisotropic control method of selected laser melting parts and the performance enhancement by using anisotropy,and provide a technical method for the direct manufacturing of structural parts with complex characteristics such as topology optimization and generative design structural parts.