Goods & Services

Common metals, unwrought or semi-wrought; alloys of common metal; steel alloys; steel, unwrought or semi-wrought; metal building materials and elements; reinforcing materials of metal for building; metal fibers; steel fibers; structural steel reinforcing fibers for concrete; shaped pieces of drawn steel wire; wire of common metal; steel wire; reinforcing materials of metal for building; reinforcing materials, of metal, for concrete; buildings of metal; steel buildings.

Abstract

A manufacturing process of components (12, 13, 13') with spherical and hollow shape and defining at least one radially inner recess (12b, 13b) with respect to an outer surface (12a, 13a) of said spherical shape is described; the process comprising the steps of i) arranging an initial component (10) inside a first hydroforming mould (3); ii) performing a hydroforming operation of the initial component (10) inside the first mould (3) in order to obtain a first intermediate component (11); iii) performing a work-hardening reduction heat treatment of the first intermediate component (11) obtained in step ii); iv) arranging the first intermediate component (11) heat-treated in step iii) inside a second hydroforming mould (4); v) performing a further hydroforming process of the first intermediate component (11) inside the second mould (4) in order to obtain the spherical shaped component (12, 13, 13') provided with the recess (12b, 13b); wherein the maximum value of pressure of said hydraulic fluid during said further hydroforming operation is greater than the maximum value of pressure of said hydraulic fluid during said hydroforming process.

IPC Classes  ?

• B21D 26/033 - Deforming tubular bodies
• B21D 37/16 - Heating or cooling
• B21D 53/10 - Making other particular articles parts of bearingsMaking other particular articles sleevesMaking other particular articles valve seats or the like
• B21D 51/08 - Making hollow objects characterised by the structure of the objects ball-shaped objects
• F16K 5/06 - Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfacesPackings therefor
• C21D 1/26 - Methods of annealing

Goods & Services

Architraves of metal; metal reinforcements for construction; laths of metal; masts of metal; crash rails of metal; reinforcement rods of metal; blocks (metal -) for construction; capitals (metal -) being parts of pillars; metal roof trusses; structural steels; pillars of metal for building; building components of metal; metal ceiling panels; flashing of metal for building; metal framed buildings; reinforcing materials of metal for building; building elements of metal; extrusions of metal; steel fibers; gratings of metal; grates of metal; structures of metal; slabs of metal for building; paving blocks of metal; building and construction materials and elements of metal; common metals, unwrought and semi-worked, for use in further manufacturing; reinforcing materials of metal; uprights of metal; posts of metal; metal hoarding; anchorage plates of metal; building materials of metal; shaped metal sections; metal stanchions; joists of metal; gussets made of metal; meshes of common metal; latticework of metal; metal cladding; architectural metalwork for use in building; solder (metal -) for common metals; framework of metal for building; frameworks of metal; space frames of metal; lintels of metal; metal billets; common metals and their alloys; nets of metal.