Dynamic Pressure Research On Continous Casting And Pelletizing Forming Of The Maganese Alloy

As steel plants have an requirement of manganese alloy with smaller particles, manganese alloy casting technology has an important significance in the industry, in contrast, traditional production methods, which have low efficiency and other disadvantages. There is an internal stress due to the brittle of manganese leading to cracking appear during cooling process under natural condition, which pressurizing can be performed to achieve the desired distribution of the grain.The continuous casting apparatus of manganese alloy was designed, of which the movement of cavity and the pressing mechanism were powered from two incomplete gears, then the number of teeth of gears was designed to control synchronize of the movement of the cavity and the pressing mechanism, as a result, the entire casting equipment work steady and orderly.The stamping process gives special requirements to press machine in the process of stamping production. During the stamping process, the punch have to keep a lower speed, avoiding excessive momentum causing damages to specimen and splash of slurry, meantime, the speed of travel of the punch should basically maintain uniform. After completion of stamping, the punch leave the mold as soon as possible, that is to have a good quick return motion characteristics, in order to ensure the efficiency of pressure mechanism. Pressure angle should be design as small as possible, in order to make the entire organization more effectively transmit force to the punch, ensure the punch mechanism have good dynamic characteristics.Based on these requirements, a six-link press agencies was designed, what’s more a model of the six-link press agencies is builded from ADAMS software, and the pressure angle is optimized, so that the final average from27.062°to13.542°.In this paper, the dynamic response of the specimen at a constant speed under load impact stamping process were analyzed and discussed, by virtue of a nonlinear finite element program LS-DYNA. Simulation analysis of dynamics of granular specimen were realized and propagation of stress when subjected to dynamic loads and stress distribution of semi-solid specimens were analyzed. when specimens under impact load, the stress is large near the area in front of upper die, obviously, far away from the region of the upper die stress is small. The stress cloud is constantly changing with the impact of stress.All the stress on the contact surface of the spherical particle all are compressive stress, the compressive stresses of the first three contact surface were relatively large, by contrast, the contact surface of the back pressure stress is small, the values differ by several orders of magnitude and the value of pressure stress on contact surfaces which are farther away the mold were smaller, almost rendering the law of diminishing magnitude.The responses of different spherical particles in the stamping process were also analyzed, obtaining the center unit of spherical particle and relationships of stress variation with time. The relationship of stress and time is similar to contact surface and the stress of the upper spherical particles are larger, but the opposite situation occurs in the lower ball, which the case of decreasing magnitude was also appeared.