| Aluminum alloy welding has a wide range of applications in the production of aerospace equipment,especially space rockets.At present,the production welding of rocket tanks in China uses a combination of friction stir welding and TIG welding.Welding defects can only be repaired by manual TIG welding,and TIG welding easily causes problems such as large residual stress and deformation.Research on the use of friction plug welding to repair welding defects is of great significance to the improvement of aerospace product manufacturing quality and production efficiency.At present,China’s plug welding research is in the laboratory test stage,and there is no plug welding equipment for on-site processing.In order to study the applicable and field plug welding equipment,the following aspects are studied in this paper.(1)Set up a friction plug welding equipment test platform,and briefly describe the equipment calibration and debugging process.The data-driven adaptive design method is introduced,and a system consisting of physical equipment,information network,and artificial subject is established.The plug welding test is performed at the rocket storage tank production site,and the plug welding test data is collected and collected.Establish a database to store data.Establish data feature identification and weak item evaluation methods to analyze and process the data.Adaptive design of pull forging friction plug welding equipment based on data driving.(2)Welding force analysis of plug and workpiece during plug welding process,load model of plug hydraulic spindle rotation hydraulic circuit and cylinder hydraulic circuit load model,according to the actual hydraulic component model parameters,use AMESim software to build a hydraulic simulation model,and according to the experiment The measured operating parameters of the equipment,the parameters of the load and other components are identified,and a simulation model that can simulate the actual experimental conditions is obtained.This model is used to optimize the loading path and pre-design,which provides the basis for the simulation prediction of the plug welding test and the guidance test using the equipment model and plug welding load coupling model in the later stage.The established hydraulic simulation model was used to simulate the pre-selected plug welding spindle rotating hydraulic circuit.The results show that the new-generation motor has better stability and better anti-stall ability under the same load.(3)Aiming at the problems reported in the test,such as easy plugging,loose nuts,leaking hydraulic oil,and difficulty in connecting and disassembling plugs,propose solutions one by one and solve the problems,and adaptively optimize the plug welding spindle.Design,use the actual load data of the test to carry out finite element analysis,and design a new generation of plug welding spindle structure with more field welding adaptability.(4)According to the welding situation on the spot,classify the types of plug welding workpieces,and design plug welding tools suitable for rectangular flat plates,arc plates and storage tanks according to requirements.Combined with the actual working conditions of each tooling,Abaqus and Simsolid software were used for modal and static finite element analysis,and the model parameters were adjusted to obtain a tooling that meets the requirements of plug welding for various workpieces.A new generation of mobile plug welding equipment has been initially constructed. |
PDF Full Text Request