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Towards an optimized process planning of multistage deep drawing: an overview

Wifi A. S., Abdelmaguid T. F.

Journal of Achievements in Materials and Manufacturing Engineering

2012

Vol. 55, nr 1

7--17

Purpose: To present a concise literature review on the optimization techniques used for the single stage and multistage deep drawing process, and to identify directions for future research. A perspective on a comprehensive optimized computer aided process planning is provided for multistage deep drawing processes. This is an integrated rule base/dynamic programming/finite element approach that minimizes the total number of stages and heat treatment needed. Design/methodology/approach: Relevant research is classified according to the major process parameters and the optimization techniques used. Main features and major outcome of the applications are presented. Findings: There is a lack in the literature in providing a comprehensive approach for optimizing the multistage deep drawing process. Research limitations/implications: Directions for future research towards integrative models for optimizing the multistage deep drawing process that take into consideration economic as well as operational objectives are identified. Originality/value: This paper provides a guide for researchers in the field of deep drawing and identifies some directions for future research that can be pursued. It also gives some insights to practitioners in that field on how integrated models can improve the economics and the quality of the process planning decisions for multistage deep drawing.

The analysis of multistage deep drawing of AA5754 aluminum alloy

Paćko M., Dukat M., Śleboda T., Hojny M.

Archives of Metallurgy and Materials

2010

Vol. 55, iss. 4

1173-1184

This work is focused on the multistage deep drawing of AA5754 aluminum alloy box-type part with flange. Both experimental and numerical analysis were performed in this study to predict causes of contraction and cracking occurring in deformed product in respect to the changes of friction conditions on tool-drawn part contact surface. The numerical simulations were performed using eta/DYNAFORM software and LS-DYNAŽ solver. The research showed, that the results of the simulation are in very good agreement with the results of the real multistage deep drawing processes. Moreover, this study showed, that proper conditions of friction on the tool-drawpiece contact surface is crucial for the correctness of the analyzed deep drawing process. Too large friction can restrict the material flow, particularly along the edge connecting the bottom and side-walls of the drawpiece, causing wrinkling and cracking.

W ramach niniejszej pracy przeprowadzono komputerową analizę wielooperacyjnego tłoczenia skrzynkowej części z kołnierzem ze stopu aluminium AA5754, z wykorzystaniem oprogramowania Eta/DYNAFORM. Celem badań było komputerowe odwzorowanie rzeczywistego procesu tłoczenia oraz próba określenia przyczyn występowania przewężeń i pęknięć w wyrobie pod kątem zmian warunków tarcia na powierzchni kontaktu narzędzia z materiałem wsadowym. Badania wykazały dużą zgodność wyników symulacji z pomiarami eksperymentalnymi. Badania wykazały również, iż zbyt duże tarcie ogranicza płynięcia materiału wzdłuż krawędzi łączącej dno i ściany wytłoczki, powodując nadmierne przewężanie się lub pękanie materiału.