Structure Design Of The Transfer Device For A Cabin Assembly System And Analysis Of Mechanical Properties Of Its Key Components

In the process of automatic assembly of products,the transfer technology will greatly affect the automation level of the assembly technology.In order to adapt to the development trend of future spacecraft intelligent manufacturing,and to solve the flaws on low degree of automation and poor working efficiency in the cabin transport process of domestic,a set of transshipment devices which will be applied to the cabin flexible docking system development project is designed in this paper based on the existing industrial AGV products in China.Then mechanical properties analysis and structure optimization design are conducted.Firstly,this paper describes the background and significance of developing the transport device of cabin flexible docking system,and analyzes the research status of transport technology and other related technologies at home and abroad.According to the functional requirements without lifting for transport device in cabin flexible assembly process,two overall structure design schemes which are divided into submerged and separated of drives are proposed.The superiority of the drive and bracket separation transfer scheme is determined.Secondly,based on the preferred scheme,the structure of the transport device is divided into the transmission mechanism part and the AGV vehicle mechanism part,which are designed in detail.The three-dimensional solid model of the two parts is established,and the related standard parts are selected and checked in the analysis foundation of the working space,functional requirements and performance indicators of the two parts of the device.According to the structural characteristics and stress conditions of each part,stress on the key parts,such as connecting the telescopic rod,the support frame,the universal ball table and so on,are introduced.It is verified that the structure of each part meets the requirements of strength and stiffness.Finally,the structure of the support frame of the vehicle mechanism is optimized.The multi-objective mathematical model of structure optimization for support frame is established with the targets of mass minimization and deformation minimization.The structure topology optimization and multi-target size optimization for the AGV vehicle support frame are carried out in turn with the help of the finite element software and multi-objective genetic algorithm.On the premise of meeting the design requirements of the supporting frame structure,the lightweight design of the structure are realized.Through accomplishing the above work,it provides theoretical and technical support for the engineering application of the transfer device.