Study On Structure Of 5000kN Twin Cone Roll Axial Mill's Transmission And Fuselage

Double-roller roll forming is a new process of metal plastic rotary forming that evolved from the ordinary pendulum roll forming technology.It through to the billet local load,accumulated for many times,finally the overall forming,compared with traditional integral forming process,its advantages is that the pressure required for forming is small,the forming process is more stable,and the workpiece quality is better.It is easier to realize mechanization and automatic production,and can be widely used for forming end face complex and the thickness of the thin disk,circular parts and end face gear,etc,it can also be applied to pendulum forming parts requiring large tonnage.However,the double roll stumbling technology is still in the immature stage.Wwhether it is the pendulum forming theory or the development and manufacture of machine equipment.Based on the twin cone rolls axial mill independently researched and developed by the research group,this paper analyzes its working principle,and explores the mutual influence mechanism between the two-roll revolution,the rotation of the roll and the feed motion of the mold and the blank,and constructs the kinematics and dynamics model,deduces and refines the theoretical calculation methods and formulas for the contact area,forming force,moment and motor power in the rolling process.At the same time,stable rolling conditions for the double roll roll boring were also obtained.It provides powerful theoretical support for the design and analysis of double roll pendulum machines.According to the load law of the twin cone rolls axial mill frame and transmission parts,combined with the actual requirements,the basic equipment parameters of the 5000 kN twin cone rolls axial mill are formulated in this paper,the prototype structure is designed,and then,the relevant parts of each component are modeled and assembled by UG to obtain a three-dimensional model of the prototype body.At the same time,a finite element model was constructed for the main shaft and the roll axis of the transmission part of the prototype to check the stiffness,strength,and modal frequencies.The correctness of the structural design were validated,and the improvements were also made to the structure of the roll shaft joints that did not meet the strength requirements.By constructing the mechanical model of the prototype rack part,the prestressed and fully loaded conditions of stress and strain are analyzed separately,confirming the rationality of the rack structure design and preload design.In order to ensure the performance of the rack while achieving lightweight,this paper also carried out a series of optimized design of the prototype.First,through topology optimization,the structure is simplified under the condition of satisfying the stiffness,and then by means of sensitivity analysis,the influence of the main splicing hook on the performance of frame is obtained.Finally,based on the size optimization,determine the reasonable design frame of the plate thickness,thus completing the whole optimization of the prototype frame.Through the design and optimization of the 5000 kN twin cone rolls axial mill,it not only provides reference and support for the actual manufacturing of the plant,but also provides scientific basis and guidance for the design of the twin cone rolls axial mill with better performance in the future.