FIELD: pressure processing of metals.
SUBSTANCE: invention can be used in manufacturing of tubular profiles used in bridge and crane structures, in framework, in load-bearing coating systems of various buildings and structures. By carrying out technological operations to change the cross section of a round pipe, a pipe with a hexagonal cross section is obtained. The section consists of a pair of equally high walls and two pairs of equally sized inclined faces. The inclined faces form obtuse angles of 135° with the walls, and right angles of 90° between themselves. The ratio of the overall dimensions of the width and height of the section is 1/6.79 along the midline of this section.
EFFECT: increase in the bearing capacity of the tubular profile.
1 cl, 4 dwg, 1 tbl
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