The Analysis And Optimum Design Of China-type Cubic High-pressure Apparatus By FEM

Nowadays, high pressure science and technology has been widely studied,which is because the superhard materials can be compounded under high pressure and applied to industrial production. But the development of high pressure science must be based on high pressure technology. China is one of the major producers of superhard materials such as industral diamond and cubic boron nitride (CBN). The annual output of industrial diamond accounted for 80 percent of the world. China-type cubic high pressure apparatus (CHPA) is the main equipment of the synthesis of industral diamond and cubic boron nitride (CBN) in our country. So the optimization design of the high pressure equipment has attracted more and more attention. The design of the main components of CHPA is closely related to reducing costs. The optimum designs of the hinge sleeve and work cylinder of have extremely important significance. because these parts are two key parts of the CHPA. The optimum designs of the hinge sleeve and work cylinder of CHPA have extremely strict requirement, because these parts are work in ultimate high pressure and high temperature. In this article, the 3-D solid feature modeling and finite element model have been founded by Pro/Engineer and Ansys workbench respectively. We have calculated the strains and displacements of the hinge and cylinder in the actual working status of the press. A comparatively perfect theoretical analysis has been carried out on its strength property. Further more, based on the result of analysis, the work cylinder have been optimum designed.The hinge sleeve, cylinder and dowel in China-type CHPA had been analyzed by structure analysis of Ansys workbench. The influence of fixing dowel which is result in an exact simulation results and avoid large number of similar and supposition for ear had been calculated firstly. The results indicated that the peak value of von Mises stress in hinge sleeve was located within the inner ear and that in cylinder located within the bottom of cylinder. In the maximum stress region, the calculated maximum von Mises stress is 348.32 MPa and 242.87 MPa respectively. These values are lower than that of the failure stress (486.67MPa). These results had been verified by lots of high pressure experiments.It can be seen that the hinge sleeves'system have more optimal space. In this paper, the diameter of work cylinder is 560mm,and its thickness is 60mm.However, a patent has been obtained on the cylinder's thickness, which is 10mm. Some one is testing a thinner work cylinder. Base on the above data, we calculated the strains and displacements of the hinge and work cylinder ,and the cylinder's thickness is 60mm,10mm,5mm and 3mm respectively. The simulated result indicated that, when the cylinder's thickness is 3mm,the maximum von Mises stress lower than that of the failure stress. We have designed of the hinge sleeves by reduce the thickness of cylinder. The simulated result indicated that the design of the hinge sleeves'system can cut down the failure stress, save the material and reduce the cost in the process of produce.The article provides referenced data for the hinge sleeves'structural optimal design. The result of analysis provided theoretical references for the improvement and perfection of the China-type CHPA.