Automatic Optimization of Die Casting Plunger Velocity by Numerical Simulation Hitachi Limited

Format:

Conference/Event

Author/Creator:

Takahashi, Isamu, author.

Conference Name:

SAE 2005 World Congress & Exhibition (2005-04-11 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2005

Summary:

A numerical simulation technique was implemented to automatically optimize the plunger velocity to reduce the defects occurring during die-casting by considering the number of free surfaces and potential energy of the molten metal. In pressure die-casting, the most common defect is porosity that is formed by air entrapment in the following two stages - the first is the injection of the molten metal into shot sleeve, and the second is the filling of the molten metal into the cavity. The latter phenomenon has been investigated in detail by various numerical simulation codes, but there is limited information concerning the former. In order to the simulate flow pattern in the shot sleeve, a moving boundary method is incorporated into the conventional filling simulation system. In addition, the plunger speed and the acceleration time for the various pre-filled levels of molten metal in the sleeve are determined by automatic optimization. Optimized results of flow pattern in the sleeve are also described. The resulting optimization ensured sound part design, reduction of scrap and the minimization of defects

Notes:

Vendor supplied data

Publisher Number:

2005-01-1686

Access Restriction:

Restricted for use by site license