Abstract: A mandrel for winding sheet metal has a generally tubular mandrel body extending along and centered on an axis and formed at one end with a plurality of radially throughgoing and angularly spaced apertures each having a pair of closed and axially confronting end faces, a spreading bar extending axially inside the body and having a respective pivot adjacent each of the apertures, respective rigid links extending through the apertures and having inner ends carried on the respective pivots and outer ends projecting outside the body, and respective segments outside the body and each pivoted on the outer end of a respective one of the links. Respective pressure plates are operatively connected at the one end between the segments and the mandrel body.

Abstract: The invention relates to a reel mandrel (1) for winding sheet metal, in particular rolled hot strip, comprising a mandrel body (2) preferably configured as hollow-cylindrical, a spreading bar (3) which can be adjusted relative to the mandrel body (2) in the axial direction (A) and a number of segments (4) which are radially adjustable by axial movement of the spreading bar (3) relative to the mandrel body (2), wherein a number of links (5) pivoted on the spreading bar (3) and the segments (4) are arranged between the spreading bar (3) and the segments (4). In order to make such a reel mandrel suitable for winding high-strength and super high-strength materials, the invention provides that in the mounted state of the reel mandrel (1), at least a number of links (5) pass through recesses (6) in the mandrel body (2) which are inserted in the mandrel body (2) such that this is at least free from recesses (6) at its axial ends (7).