Design And Research Of High-purity Beryllium Vacuum Hot Pressing Device

With the widely application of high-purity beryllium targets in aviation,national defense,medicine and other fields,improving the purity,density and production efficiency of beryllium targets is of great significance to the development of high-tech.As one of the most widely used processes for preparing high-purity target materials,vacuum hot pressing has the advantages of high purity,good compactness,low sintering temperature and short sintering time.According to the current market’s performance requirements for high-purity beryllium targets,this paper designs and develops a set of ultra-vacuum hot-press forming equipment.At the same time,in order to ensure the density and sintering uniformity of the hot-pressed beryllium,the temperature field in the vacuum furnace Finite element analysis and optimization of the heating structure based on the simulation results to ensure the uniformity of the temperature zone.The specific research content is as follows:First,according to the mechanical design theory and the technical requirements of the high-purity beryllium hot-press forming device,the overall structure design plan of the high-purity beryllium vacuum hot-press forming device was determined,including the design of the vacuum furnace,heating system,water cooling system and pressure system,and The three-dimensional modeling of the parts and the assembly of the whole machine are completed by UG software.The device has the advantages of compact structure,stable operation,etc.,and effectively improves the purity and density of the beryllium target material.Secondly,in order to test the strength of the key components of the pressure system,ANSYS Workbench was used to perform a static strength finite element analysis of the key components,including hydraulic cylinders,upper beams,lower beams and columns.According to the results of finite element analysis,the structure and size of the components of the pressure system were improved,and the lightweight design of thestructure was realized.After optimization,the stability of the system was improved and the manufacturing cost was reduced.Then,using thermal analysis theory to study the temperature field in the vacuum furnace,the distribution of the temperature field in the furnace during the heating process is obtained through finite element analysis,including the temperature distribution and temperature rise curve of the mold and the inner beryllium powder.At the same time,the influence of heating power and heating body diameter on the temperature field is compared and analyzed.After comprehensive consideration of heating efficiency,temperature zone uniformity,heat shield strength and other factors,certain optimizations and improvements have been made to heating power and heating body diameter to ensure the uniformity of the temperature field in the furnace to achieve a good sintering effect.Finally,based on the microcontroller control theory,the temperature control system of the high-purity beryllium vacuum hot-pressing device is designed,and the hardware circuit design including the temperature control main module,temperature detection module,keyboard module,display module,alarm module,and temperature control module is completed.Draw the hardware circuit diagram of the entire temperature control system.Then complete the design of the software flow diagram according to the division of labor and function of each module.The entire heating system can be heated in strict accordance with the established process curve.