EVALUATION OF FORGING PARAMETERS ON AL-۷۰۷۵ AIRCRAFT DOOR BRACKET BY SIMULATION

The purpose of this research is to achieve the optimal parameters for producing forged aluminium alloy ۷۰۷۵ aircraft door bracket by using finite element modelling (FEM) with commercial DEFORM-۳D V۶.۱ and physical simulations with plasticine and Plexiglas dies. Also, forging speed has been examined as the main factor for controlling to produce a part without any defects. The results of Physical Simulation showed that the flow pattern has good agreement with the results of FEM that based on the use of hydraulic presses with initial billet and dies temperatures ۴۱۰ and ۴۰۰ ° C, respectively, and different forging speeds ۵, ۱۰ and ۱۵ mm/sec. Distribution of effective strain rate, effective strain, effective stress, temperature , forging force and dies­ wear showed improvement the results in forging speed of ۵ mm/sec. Processing map of Aluminium alloy ۷۰۷۵ also checked out at constant strain ۰.۵, indicated that the specified area of the forged part is located in a safe area. Forging force in optimized forging speed ۵ mm/sec showed that the forging process using a ۱۰۰۰-ton press can be done easily

Keywords:

FEM , ۷۰۷۵ Alloy , Physical Simulation , forging speed