The fifth expansion for tools of expansion to hollow pieces and expansion tool for hollow pieces

摘要

Summary "head of expansion for tools of expansion to hollow pieces and expansion tool for hollow pieces" the invention relates to an expansion head (1) for tools to expandHollow pieces, especially at the edges of plastic tubes and pipes connecting metal plastic, comprising a coupling cap (2),Which has a flange Guide (3) directed radially inwards, and a set of jaws in the form of a sector (4),Each of which is received individually by a sector of the internal flange (5) overlaps the flange Guide (3), so as to be radially movable on the lid of the coupling (2),Since the set of jaws in the form of a sector (4) is movable between a closed state and an expanded state is formed by a sleeve of the external walls (7) of the set of mandu00edbul(4) around a cylindrical surface, each expandable jaw (4) exhibits at least one depression (8) extending in the direction of the longitudinal axis of the jaws (4),So that the area of the external walls (7) of the set of jaws (4) is in the closed state of the expansion head (1) of 25% to 75% of the area of the wrapper of the external walls (7) of the conFrom the jaws.In addition, the present invention relates to a tool for expansion to hollow pieces, especially at the edges of pipes made from plastic or made of metal is coated with plastic.Which comprises an expansion head (1) according to the invention, 1 / 1