FIELD: technological processes.
SUBSTANCE: invention relates to the extrusion of pipes. Method includes extruding, utilising a first die and a mandrel, a hollow tube having a first tube section having a first outer tube diameter Z, a first inner tube diameter, and a first length, extruding, utilising a second die and a mandrel, continuing from an end of the first tube section, a hollow tube having a second tube section having a second inner tube diameter and a second length, wherein the second die has a first die section, where an angle of a wall of the first die section of the second die relative to a longitudinal axis of the hollow tube ranges from 10 to 45 degrees, subsequent extrusion of a third section of the pipe, the third inner tube diameter and third length, as well as the production of a monolithic hollow stepped aluminium tube with regulated dimensions.
EFFECT: invention widens the field of use of products.
15 cl, 14 dwg
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