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Analysis of the cutting parameters influence during machining aluminium alloy A2024-T351 with uncoated carbide inserts

Haddag B., Atlati S., Nouari M., Barlier C., Zenasni M.

Engineering Transactions

2012

Vol. 60, iss. 1

31-39

This work aims to analyze the effect of the cutting parameters on chip segmentation of the aluminium alloy A2024-T351 during machining process. In this work, two parameters are considered: the tool rake angle of the cutting tool and the feed under dry machining. An orthogonal cutting FE model is developed in Abaqus/Explicit for this purpose. A thermo-visco- plastic-damage model for the machined material and thermo-rigid behaviour for the cutting tool have been assumed. At the chip/tool contact zone, the modified Coulomb friction model has been adopted. Thermal effects are considered by taking into account the heat flux generated by visco-plastic strain and also by friction at the tool-workpiece interface. The obtained results showed the effect of the tool rake angle and feed on the cutting force and chip morphology as well as temperature distribution at the tool rake face.

Moulds for high pressure die casting by Stratoconception®

Pelaingre C., Abel C., Velnom L., Thabourey J., Barlier C.

Prace Naukowe Instytutu Technologii Maszyn i Automatyzacji Politechniki Wrocławskiej. Konferencje

2004

Vol. 85, nr 42

173-180

In this paper, we present a rapid tooling study by Stratoconception process for die casting. This Study, which Avas carried out within the framework of the FASTOOL European project (CRAFT n° contract G1ST-CT-2001-50133), enabled to validate experimentally our technology with the mechanical and thermal constraints of the die casting process. Also, this study allowed us to consider its industrials applications. This mould has been manufacture from steel sheet. These sheets were transformed into stratum by use of two complementary cutting methods: laser cutting and high speed micro-milling method. Then, the strata were assembled by brazing in order to produce a laminated tool with the right mechanical properties. Thermal effects have a great influence in die casting mold, essentially on the lifetime of the mould. Thus we integrated and carried out conformal channels. The optimization opportunities of the cooling channels brought by our process provides new improvement prospects for thermal control of the mould. This R&D work has been then patented (PCT procedure). This first die casting mould allowed us to produce more than 2600 aluminum parts. The presentation of the mould design is completed by comparative technico-economic study between our process, other rapid tooling techniques and the conventional tool production method.