| Large-scale Hydraulic equipment manufacturing industry is an infrastructure, it involving the application of the national economy in all fields, it has also been increasingly widely used especially in the field of plastic processing.This Large-scale equipment is the foundation of the nation's characterization and an important guarantee for national security.The project of modernization of large-scale manufacturing major equipment plays an irreplaceable role.Large-scale forging presses have a direct link and far-reaching consequences for military industry, aircraft manufacturing industry, the nuclear power industry. As a necessary key equipment for "large-plane" starting, 800MN (80000 tons) giant forging presses is the world's largest forging presses, is more than the previous world's largest forging presses Russia 750MN. Large forging presses construction projects, changes in China's large-scale forging dependence on imports, the passive situation of the others, to achieve large-scale manufacture of forging their own products, and it is importance for stratagem.Combining National Key Basic Research Program ( "973" plan) "Forming equipment giant transmission power flow characteristics and high-precision manufacturing interface formation" ,the dissertation made a detailed analysis and design from the static perspective for structural features and power flow transmission of 800MN giant forging presses. This thesis includes the following main aspects:The dissertation made an in-depth study on the combination of large-scale structure of the finite element model. In the structure of the portfolio of large-scale modeling in the process of selecting the type of unit, the unit rule, the friction model selection and other issues in detail and analysis of the simulation test. Come to the establishment of such a large-scale structure of the combination of general principles to be followed, so that simulation results become more real. The results provide guidance for finite element analysis modeling of large-scale composite structures.800MN giant presses for used C-plate rack structure, the dissertation got the best pre-theoretical calculation formula of rod clamping force for C-plate rack structure, in finite element platform, amend the results of theoretical calculation; Rack-frame had been the best bar clamp preload the value of the amendment. By clamping rod and the best preload research, come to C plate with the state of contact with the four-way tie pre-clamping force of relativity.In the platform, the dissertation analyzed and checked all the key pieces of 800MN forging presses, and got the key pieces of C plate had a partial improvement and optimization of the structure. Through the increased department clamping beam of the chamfer radius of the slot, clamping beams to change the size of the slot in high-stress zone for an additional unloading slot, C increased with the clamping plate beam contact area and other measures, the C plate clamping beam slot department tensile stress lower 3 to 4 times, in conjunction with the actual project, the C plate had been a reasonable optimization program to design and use of the requirements.In different conditions, all the key pieces of the machine were compared and analyzed from strength and stiffness. The results show that the eccentric load balance force sync condition is the most dangerous, simultaneous failure to prohibit the operation of eccentric presses. At the same time, come to exert power synchronous eccentric load and load center, and the whole key pieces of the stress and deformation are basically the same conclusion.The dissertation had done a more detailed analysis of the check for 800MN giant forging presses from the perspective of statics, and 650 tons prototype experimental data were compared and analyzed data, Contrast from the data, the simulation results coincide with the test results shows that the credibility of simulation results.The result of research paper provides a theoretical basis for the design and manufacture of presses. |
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