MANUFACTURING METAL TUBES BY EXTRUSION METHODS

Abstract

Extrusion is the technological method of machining metals through plastic deformation in volume, which is used in making parts of simple or complex configuration, hollow or solid, with a section transversally smaller than that of the semi-finished part, due to the material flowing in the space between the punch and the active plate or through the hole in the active plate. The extrusion methods entail large reductions in the cross sectional area of the semi-finished product, reductions which can reach up to 90% or more in a single operation. Metal extrusion technologies have a wide range of applications, i.e.: Fine Mechanics, Electrotechnics, Electronics, consumer goods industry etc.