Research On The Structure Design And Simulation Of High Precision Of High Precision Titanium Alloy Isothermal Superplastic Forming Hydraulic Machine

Titanium alloy sheet metal is the main part of the frame and the airframe aerodynamic shape,in the manufacturing process of titanium alloy sheet metal,superplastic forming has good formability,forming precision and no residual stress,it has become a key manufacturing technology in aerospace industry.Isothermal superplastic forming equipment need to have precise forming temperature control and speed control.At present,the market for aviation special forming equipment forming of titanium alloy basically monopolized by European and American companies,in order to break the monopoly of foreign enterprises,the research and development of titanium alloy isothermal forming equipment is very urgent in our country.First of all,as thin-walled structure of large titanium alloy superplastic forming and diffusion bonding process requirements,using DEFORM software,the titanium alloy isothermal superplastic forming process was simulated and analyzed for titanium alloy sheet metal in the forming process of sheet metal should stress and strain variation,as grain flow law and failure law,in the process of form the maximum load in the forming process.The theoretical basis is provided for the forming process planning of titanium alloy and the design technical parameters of isothermal forming hydraulic press.Secondly,the overall structure of 5000 kN isothermal superplastic forming hydraulic machine is established,including hydraulic system,heating system,thermal insulation system and water cooling system,argon and vacuum system,etc..According to the design requirements of the hydraulic machine hydraulic machine frame structure and key components,including the upper beam,lower beam,column and bar of stiffness calculation of preliminary design and strength / determine the detailed structure and key dimensions.A detailed model of the hydraulic machine body structure is established by using Solidworks.Once more,according to the requirements of the design of hydraulic machine,a finite element analysis model of the hydraulic machine structure,using ANSYS Workbench software to analyze the multi condition statics of hydraulic press,hydraulic press,the upper beam,rod and beam under the equivalent stress change law,and then analyzes the deformation of the frame,on the beam and column,and the key structure are improved and optimized design,to meet the requirements of the overall design.Finally,processing stiffness analysis of titanium alloy isothermal superplastic forming hydraulic machine coupling mold,by setting three kinds of mould table,analyzed the stiffness change of upper beam,lower beam,beam,column,analyzed the deformation law of different mould under the table hydraulic pressure parts.The results of coupling stiffness analysis show that the designed hydraulic press can meet the requirements of high precision titanium alloy thin-walled structure with large superplastic forming and diffusion bonding process.