CAD implementation of design rules for aluminium extrusion dies

The main objectives of this paper is to find the way for solving the problems of aluminum extrusion process, and improve the mechanical properties of the products through a smart design, modelling and simulation of this process by using finite element method (FEM). For the purpose to model a (2D) two dimensions warm aluminum extrusion process, ABAQUS software was used to set up the finite element simulation. The main parameters which have major effects on this process like extrusion stresses, temperature, and die geometry, i.e. extrusion radius, were taken into consideration. Aluminum alloy (Al-2014) was used as the billet material, with 40 mm diameter and 75 mm length. It is important to preheat the billet from the beginning to a specific temperature, and then pressurizes it into the die. This process is an isothermal process with an extrusion ratio of 3.3. Subsequently, the optimized algorithm for these extrusion parameters was suggested based on the simulation results. The results suggest that the large die angle needs a less extrusion load than the small die angle. In all die geometry used, the deformation of aluminum billet, which caused by shearing and compression stresses, happened in a small sectional area, i.e., bearing area. The results also showed that the values of these stresses can increase or decrease depends on the die entrance angle and the die bearing length. To avoid the effects of these stresses on die dimensions; the hardness, material selection, and geometry should be well calculated.

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“…2 below shows the meshed model. Extrusion ratio and the required extrusion force are calculated by Eq.1 anal Eq.2 respectively [6].…”

Section: Modeling Processmentioning

confidence: 99%

“…where R is the extrusion ratio, A o and A f are the primary and final cross sectional area of the blank, while F and P are the extrusion force and extrusion pressure respectively. [6].…”

Section: Modeling Processmentioning

confidence: 99%

Modelling and Simulation of Hollow Profile Aluminum Extruded Product

Magid

Sulaiman

Ariffin

et al. 2015

AMM

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“…Another advantage is the reduction of production time by reducing the amount of trial pressings. Research over the last years within Boalgroup has shown that a consistent application of objective design rules, leads to better performing dies [68]. It also shows that in some cases the performance of the dies deteriorate with the use of these design rules.…”

Section: Flow Related Defects In Aluminium Extrusionmentioning

confidence: 99%

Analysis tools for the design of aluminium extrusion dies

Koopman

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PROEFSCHRIFT ter verkrijging van de graad van doctor aan de Universiteit Twente, op gezag van de rector magnificus, prof. dr. H. Brinksma, volgens besluit van het College voor Promoties in het openbaar te verdedigen op donderdag 11 juni 2009 om 15.00 uur door Albertus Johannes Koopman geboren op 22 november 1976 te BrederwiedeDit proefschrift is goedgekeurd door de promotoren: Prof. dr. ir. J. Huétink Prof. dr. ir. F.J.A.M. van Houten en de assistent promotor dr. ir. H.J.M. Geijselears viii de matrijs noodzakelijk zijn. Om vorm van het kopstuk te kunnen voorspellen is van grote waarde tijdens het matrijs ontwerp. In hoofdstukken 4 en 5 wordt een nieuwe methode behandeld om de vorm van het kopstuk te bepalen. In het laatste hoofdstuk worden, aan de hand van een vergelijking tussen experiment en simulatie van de extrusie van een buis, de mogelijkheden getoond van de voorgestelde methode. De vorm van het kopstuk voorspeld met de methode komt goed overeen met de vorm van het kopstuk uit het experiment.

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