Structural Design And Theoretical Analysis Of Small Gap Butt Joint Platform Under Special Conditions

In some special conditions,in order to meet the requirements of assembly and performance test,the docking and separation between large parts is necessary.At present,the manual alignment and manipulation are mainly applied in the docking and separation between the parts.As a result of the safety of operation and the quality of assembly are mainly depend on the engineering experience and skill level of technologist,the assembly process has many hidden dangers.For solving this problem,this thesis proposes some new performance requirements of the assembly platform under special conditions,refer to the current process,designs a new assembly platform,and analyzes the statics and kinematics of the key parts with the application software.The new assembly platform avoids the shortcomings of traditional hoisting method,and solves the difficult problem of poor visibility between butt joints and manual adjustment,which is caused by the low moving accuracy of the crane and the ground mobile equipment.the new docking platform realize the quantization of position and attitude adjustment,and the quality and efficiency of it have been greatly improved.Firstly,the research status and characteristics of the equipment at home and abroad has been analyzed,combined with actual working condition,this paper puts forward a new project of butt assembly,which can achieve five degree of freedom position and attitude in micro aspect,and vertical movement in macro aspect,in other words,it can realize the position and attitude adjustment with six degrees of freedom.With the horizontal adjustment of the ground mobile equipment,it can achieve accurate docking and separation between components.According to the working environment,the different parts are measured and monitored by the displacement sensor,the coordinate calculation of its position and attitude is carried out.The trajectory planning is made use of the five polynomial.The measurement error and adjustment error are analyzed,and the judgment method of the butt joint or the separation process is given.The flow chart of control system design is analyzed.Then,the three dimensional modeling software is used to build the model of the docking assembly platform.The detailed structural design,stiffness calculation and checking work are immediately carried out.Finally,according to the actual conditions and constraints,the finite element analysis of the supporting platform,the lifting bracket,the connecting hooke hinge and the connecting parts and other parts is carried out.The weight reduction structure of some parts are optimized,the results show that the strength and stiffness of the parts meet the design requirements.When the lifting bracket is located in the lowest position and the highest position of the supporting platform,the straightness of the supporting platform is analyzed.