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Improvement of surface roughness of aluminum products by the micro-grooves on tool surface in cold extrusion

S. , Kamitani and K. , Nakanisi and S., Syahrullail (2008) Improvement of surface roughness of aluminum products by the micro-grooves on tool surface in cold extrusion. Keikinzoku/Journal of Japan Institute of Light Metals, 58 . pp. 111-116. ISSN 0451-5994

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Abstract

The effects of the micro-groove arrays formed on the tool surface on the material flow, surface condition of a billet and surface quality of a product were investigated by carrying out the plane strain extrusion experiments. Paraffinic mineral oil and RBD palm olein were applied in the above experiments. The distributions of flow velocity and effective strain in a billet were analyzed by using the visio-plasticity method. The experimental and analytical results show that the extrusion load increases with the inflow of billet to the grooves. The results also show that the surface condition of the extruded product is smoother when the location of the micro-groove array is at the inner section in the deformation boundary and a paraffinic mineral oil was used. The surface quality of a product in an extrusion process could be improved, under a slight rise of the extrusion load by using a tool with micro-groove arrays were formed on the tool surface at an appropriate section.

Item Type:Article
Uncontrolled Keywords:Aluminum; Extrusion; Lubrication; Micro-groove; Surface roughness
Subjects:T Technology > TJ Mechanical engineering and machinery
Divisions:Mechanical Engineering
ID Code:7121
Deposited By: Mohamad Ali Duki
Deposited On:23 Dec 2008 01:58
Last Modified:23 Dec 2008 01:58

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