Research On The Performance Strengthening Design And Sheet Forming Simulation Of High-Grade Hydraulic Press And Its Application

With the development of large-scale industries such as aerospace,automobile manufacturing and petrochemical industry,the demand for large-size and complex thin-walled components is increasing day by day,and further requirements are put forward for its forming quality.The forming performance of the tension hydraulic press is directly related to the forming quality of the thin-walled member,which in turn affects its mechanical properties.Therefore,the urgent need to design and development of high strength,high precision tensile hydraulic equipment.In this paper,the design parameters of the hydraulic machine main structure,the decoupling of the running performance parameters and the drawing process parameters are discussed in the process of forming the bending machine,optimization and so on,the optimization design and forming performance simulation technology of the main parameters of the thin plate tension hydraulic press are put forward and applied to the design and development of Hefei forging 150MN thin plate tensile hydraulic press.The main contents of this thesis were summarized as follows:In the first chapter,the main assembly and performance of the hydraulic press are introduced.The technical background of the high-grade drawing hydraulic press and the significance of this research are expounded.This paper introduces the current situation of bending slit,crawling jitter and anti-swell failure in the process of high-grade tensile hydraulic press.It analyzes the current research situation of domestic and foreign scholars to study the above-mentioned problems,and puts forward the design of high-technology,and finally gives the research content and organizational framework of this paper.In the second chapter,the design technology of the rigidity performance of the high-grade drawing hydraulic press combined frame for bending slit is put forward.The mechanism of bending slitting is studied,and a high stiffness target model is established.A multi-objective method for calculating the stiffness of composite frame based on particle swarm optimization is proposed.Finally,150MN high-grade drawing hydraulic press as an example,through the simulation to verify the feasibility of the proposed technology.In the third chapter,the decoupling technology of the moving slider of the high-grade tensile hydraulic press for the crawling jitter is proposed.This paper studies the low-speed crawling mechanism of the hydraulic press slider,establishes the single-degree-of-freedom friction model of the slider.Through the mechanical solution and numerical analysis,the factors that influence the crawling jitter of the slider are determined,and the solution of the high-grade drawing hydraulic machine guiding device based on TRIZ theory is put forward Coupling method.Finally,150MN high-grade drawing hydraulic press as an example,through the simulation to verify the feasibility of the proposed technology.In the fourth chapter,the optimization technology of filling performance of high-grade drawing hydraulic press for expansion and failure is proposed.The process and parameters of the drawing machine are analyzed,and the process parameter analysis method of the high-grade drawing hydraulic press based on the sensitivity analysis is put forward,and the forming performance of the high-grade drawing hydraulic machine is improved.Finally,150MN high-grade tensile hydraulic press as an example to verify the feasibility of the proposed technology.In the fifth chapter,the functional management module of the hydraulic press is developed,and the theoretical method proposed in this paper is simulated and verified,and the feasibility and effectiveness of the proposed method are verified.In the sixth,the full text of the content is summarized,and the future research direction of the subject is also discussed.