Simulation Study On Hot Extrusion Process Of Oxygen Cylinder

Along with economy high speed development and industrialization level rising in our country, the cost of raw materials is greatly improved, forcing firms to maximize the improving the quality of materials, reducing weight, rising the utilization rate. In the field of industrial oxygen bombs, to avoid serious extrusion port not neat, to improve material utilization and surface quality products are the target of many enterprises.In this paper, the backward extrusion process of oxygen bombs was simulated by Deform, and the punch speed with stroke curve and the maximum principal stress were analysed. combining with mould design, the determination of the forging temperature, improvement of billet transition radius and the orthogonal experiment to determine the port flatness of the extrudinged oxygen bombs. Based on above analyse, mechanical properties of 30 CrMo steel were studied at high temperatures and the starting forging temperature of the material was reasonably determined, andbackward extrusion of oxygen bombs with trditional square billets was analysed by combing with the design of dies.Through the determination of improvement of billet shape, scale and the transition surface diameter, the influence of different blank stucture on hot backward extrusion was studied by the orthogonal experiment method and the number of Deform simulation method. Optimization of blank structure was reached in order to have the flat extrusion port and the uniformity of deformation process by analyzing the plastic flow rule in the process. Comprehensive the above study, the best tecjnological process and structure was sloved, and the flatness of the port of extrusioned oxygen bombs was effectively controlled.