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The experimental tool for micro-extrusion of metals

Piwnik J., Mogielnicki K., Gabrylewski M., Baranowski P.

Archives of Foundry Engineering

2011

Vol. 11, iss. 2 spec.

195--198

In paper the technological tools requirements, used for micro-extrusion of metals in cold and warm conditions are presented. The constructive principles for the micro-tools are also described. The influence of the size effect in a workpiece and a tool top layers roughness form on extrusion processes in microscale are showed. The tool, designed to an experimental verification of the size effect influence, in a tool roughness form, on the metal rod forward extrusion are presented. This tool is made in the form of two halves, joined together by the pegs and screws. It has bored two dies profiles with the same dimensions, the only difference is a degree of the containers roughness. That solution gives a possibility to specify the influence of the tool roughness degree on the extrusion forces, deformation process and a product quality. Described tool was designed in such a way to manufacture it with using conventional machining equipment.