Lateral Extrusion of A6063 Pipes with a Lost Core of Alumina Powder Bonded with Wax

Abstract:

The authors have developed a lateral extrusion process with a lost core. The outline of the process is as follows. First, the cavity of a pipe, or a channel material, is filled up with liquid of a low-temperature melting material. The low-temperature melting material is then solidified to become a soluble core of the pipe. The authors call this soluble core the lost core. Next, the material is compressed longitudinally as a composite billet and extruded in the lateral direction. After deformation, the low-temperature melting material is melted and removed. The process can performed in a compression state to control the precise appearance of the product. This study examines a new core material, alumina powder (alumina ball) bonded with wax, as a core material. A mixing methodology for wax and alumina powder is discussed along with the effect of their mixing ratio on the deformation of the pipe.

• Periodical: Key Engineering Materials (Volumes 523-524)
• Pages: 1006-1011
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.523-524.1006
• Online since: November 2012
• Authors: Takahiro Ohashi, Ngoquang Thanh, Ryosuke Miyajima
• Keywords: Hollow Product, Lateral Extrusion, Radial Forging, Tube Forming, Tube Hydro-Forming (THF)

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