Analytical methods application to the study of tube drawing processes with fixed conical inner plug: Slab and Upper Bound Methods

• Autorzy: Rubio M. E.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The paper analyses the thin-walled tube drawing processes made in conical converging dies with fixed inner plugs. Design/methodology/approach: The analysis has been made by analytical methods. Concretely, the Slab Method (SM), with and without friction effects, and the Upper Bound Method (UBM) have been appliced. In this last case, the plastic deformation zone has been modelled by Triangular Rigid Zones (TRZ). The friction between the out surface of the tube and the die, and between the inner surface of the tube and the plug has been modelled by Coulomb friction. Besides, the change in the diameter of the tube has been considered negligible during the process, then, the forming process can be assumend that it is made under a state of plane strain. Findings: The results obtained by each method have been compared between them and, besides, with the obtained ones by the Finite Element Method (FEM) and the experimental ones extract from the literature about the theme. It has been able to be proven that all of them are reasonably close to a value for a certain set of parameters values. Research limitations/implications: This work is a first approache to the problem. As suggestion for future researches it is possible to remark a study of the different triangular rigid zones configurations in order to identify the TRZ pattern that requires smaller energy consumption. Practical implications: Unless it was needed to know a great number of outputs, the analytical method scan be a good option and, especially, the Upper Bound Method since, besides of completing and improving the classical analysis of other metal forming processes previously. Originality/value: The paper is orginal since the bibliographical review has allowed testing that previous works about the tubes drawing analysis made by the Upper Bound Method under plane strain and Coulomb friction conditions did not exist until the moment.

Słowa kluczowe

EN

machining; processing; plastic forming; tube drawing; slab method; upper bound method

PL

obróbka skrawaniem; przetwarzanie; obróbka plastyczna; ciągnienie rur

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2006
• Tom: Vol. 14, nr 1-2
• Strony: 119--130
• Opis fizyczny: Bibliogr. 60 poz., rys., tab., wykr.

Twórcy

autor

Rubio M. E.

• Department of Manufacturing Engineering, National Distance University of Spain (UNED), Juan del Rosal 12, 28040, Madrid, Spain

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