Numerical Optimization Design On Spindle System Of 600 Ton Inertia Friction Welding Machine

With the improvement of science and technology and the increase of social demand,the production and manufacturing of the big culvert than the commercial aero engine has become the theme of the development of the aviation industry.The light quantified and high-performance aero engine will be the inevitable trend of the development of the aviation industry in twenty-first Century,which not only promotes the technological innovation of all walks of life,but also advances the advanced technology.The development of manufacturing and new technology put forward higher requirements and challenges.The machining process of the inertia friction welding can meet the connection between the high temperature alloy and the titanium alloy disc shaft parts of the aero engine,and also the best and only way for the connection of the powder alloy disc parts.The advanced large tonnage inertia friction welding machine is the prerequisite for the welding process,and it is the support foundation for completing the connection of the aero engine components.As the core component of the inertial friction welding machine,the structure and dynamic and static characteristics of the spindle system will affect the operation of the equipment,and determine the mechanical comprehensive performance of the equipment itself.At the same time,it will also decide whether the aeronautical parts will meet the standard after welding.It will even play a decisive role in the service life of the whole aero engine.The object of this study is the spindle system of the 600 ton inertia friction welding machine for high precision aviation.The purpose is to analyze and optimize the spindle structure.First,combining the Hertz contact theory and the load distribution characteristics of rolling bodies,the deformation and stress of cylindrical roller bearings is calculated.The effect of bearing assembly interference on the stiffness of the rolling bearing is discussed,and the priority relation of two groups of cylindrical roller bearings on the static deformation of the spindle is determined.In the natural frequency of the spindle,the influence of the pretension on the natural frequency of the spindle is also explored,which provides a new way to improve the natural frequency of the lifting spindle.Secondly,the static and dynamic characteristics of the spindle system of the inertia friction welding machine are analyzed by the ANSYS finite element analysis software.The analysis results show that the static stiffness and strength of the spindle can meet the requirements.The first natural frequency of the spindle is far higher than the speed of the spindle,and it is preliminarily verified that the design of the spindle structure is reasonable.On the basis of the analysis of the original dynamic and static characteristics,the main shaft structure of the inertia friction welding machine is optimized,the static characteristic of the spindle and the speed range of the spindle are improved,and the light weight of the spindle structure is also realized.Finally,the application of the finite element method in this paper reduces the structure size of the spindle system,shortens the design cycle,saves the production cost and makes the spindle speed range a certain increase.These research results can provide an important theoretical reference for the further improvement of the performance of the spindle system of 600 tons inertia friction welding machine.