منابع مشابه
PRODUCTION PROCESS Evaluation of friction in upsetting
Distributions of contact stresses at the neutral point in metal forming are very hard to be properly predicted due to the complex interface situation and lack of suitable friction models. In this paper, the dynamic friction model in which the friction depends on both time rate of strain and normal pressure has been applied to predict contact stresses in cylinder upsetting. Case studies have sho...
متن کاملEmpirical Modeling of the Stress-strain Relationship for an Upsetting Process under Direct Electrical Current
Present research involving ElectricallyAssisted Manufacturing (EAM) has shown the advantageous effects that an applied current flux provides on the mechanical properties with respect to part formation. Overall general results using this process include the reduction of the flow stress during forming, increased achievable deformation, and a decrease or elimination of springback. Specifically tar...
متن کاملPrediction the Deformation in Upsetting Process by Neural Network and Finite Element
In this paper back-propagation artificial neural network (BPANN) is employed to predict the deformation of the upsetting process. To prepare a training set for BPANN, some finite element simulations were carried out. The input data for the artificial neural network are a set of parameters generated randomly (aspect ratio d/h, material properties, temperature and coefficient of friction). The ou...
متن کاملInfluence of Friction Coefficient on Workpiece Roughness in Ring Upsetting Process
In forming processes contact friction significantly influence metal flow, stress-strain state and process parameters. Furthermore, tribological conditions influence workpiece surface quality and its dimensional precision. This paper presents research results of the influence of contact friction coefficient on a workpiece surface quality in ring upsetting by flat plates. Workpiece surface roughn...
متن کاملOn the optimum die angle in rod drawing process considering strain-hardening effect of material
In this paper, rod drawing process of strain-hardening materials is investigated by analytical, numerical and experimental methods. The classic upper bound solution, based on the assumption of perfect plasticity, has been extended to consider the work-hardening of the material during the drawing process. For a given process conditions and mechanical properties of the rod material, the power ter...
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ژورنال
عنوان ژورنال: Metallurgy and Foundry Engineering
سال: 2007
ISSN: 1230-2325
DOI: 10.7494/mafe.2007.33.1.51