Abstract
The analysis of hot volume-forming requires description of local changes occurring in the deformation gap including thermal, and pretty often also structural, phenomena. The most appropriate solution of analysis would be application of the Finite Elements Method for a spatial model. Hardware requirements and times necessary to solve such a model are often unacceptable. Hence an attempt was made to find such a solution that would make possible performance of calculations in practically acceptable time on available computers (e.g. a SUN workstation). A procedure has been elaborated that enables application of the Finite Elements Method used in solving axially-symmetrical problems, for modelling spatial processes, for which the assumption of preserving flatness of cross-section during the forming process can be made. Verification of the correctness of the elaborated method has been carried out for bars swaging process. The paper presents a concept of a model of swaging with four flat anvils. In calculations this model allows to take into account: the deformation gap geometry, the course of the process as a function of time, the kinematics of tools and of the deformed metal movement, thermomechanical conditions of forging. The simulated mechanical state of the deformation zone takes into account the specific character of swaging process as well as non-proportional and non-monotonic increase of deformations.
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