Optimization Of Clamping Deformation Of Rocket Tank Panel And Simulation Analysis Of Clamping System

As an important part of the rocket fuel tank,the panel has the characteristics of large size,low rigidity,and easy deformation.At present,when cutting the side margin of the tank panel,usually a special mold corresponding to its size is used to fix the panel,which is likely to cause damage to the non-machined surface and reduce the processing efficiency.Moreover,with the adjustment of the tank size,this problem will be more prominent.In order to reduce the use of special molds and improve the flexibility of the rocket fuel tank panel processing process,the optimization of the clamping method and the design of the fixture structure have important practical significance and broad application prospects.In this paper,the cutting of the end face of the rocket tank panel was used as the analysis object.Based on the finite element technology,the aluminum alloy cutting process was simulated,and the panel deformation simulation calculation method was adopted to realize the comparative study of the positioning method and the optimization of the clamping scheme.The panel fixture’s clamping execution system was designed and analyzed,and it is considered that its execution ability and deformation control effect meets the requirements.Specific research contents are as follows:First of all,the force-thermal coupling finite element model of the tool-workpiece three-dimensional dynamic cutting was established through the ABAQUS software,and the cutting process of the panel was simulated.The stress distribution of the workpiece,the formation of chips,and the changing law of cutting force were analyzed,and the similarity with actual chips was compared to verify the effectiveness of the simulation model.Secondly,based on the analysis of the positioning principle and clamping principle,a finite element method was used to establish a simulation model of panel deformation analysis.Under the action of cutting force and clamping force,the influence of positioning method and clamping scheme on panel deformation was studied.The optimal clamping scheme for effective deformation control was determined.Finally,combining the optimal clamping plan and the given clamping requirements,a hydraulically driven fixture clamping system was designed.It is believed that the fixture clamping system meets the requirements of deformation control based on the mechanical calculation and strength check of the actuators,the fixture deformation control simulation,and the analysis of the movement and force characteristics of the hydraulic system,which provides a theoretical reference for flexibility design and actual production of panel fixtures.