HANNOVER MESSE 2020,
20 - 24 April
Hoesch Schwerter Profile
The process of cold drawing is a procedure by which the metal is formed in order to achieve complex profile cross sections of excellent precision. After careful pre-treatment and descaling the special profile bars are drawn through a forming die. This operation can be repeated up to three or four times.Cold drawing of hot rolled and hot extruded special profiles tightens the cross-section tolerances, thus leading to significant improvement in dimensional accuracy and surface quality. Cold drawn special profiles offer the same precision achieved by machining - but without the waste.Cold drawn special profiles offer extensiveadvantages, among other things: - smooth and scale-free surface - sharp edges - uninterrupted grain orientation - increased tensile strength and yield point Technical possibilitiesDimensions: - circumscribed circle up to approx. 200 mm Ø; for flat steel up to 300 mm wide - minimum wall thickness: 4 mmLength: - up to 11,000 mm (depending on profile cross section), with sawn ends (fixed lengths by agreement)Weight per meter: - minimum c. 1.5 kg/m - maximum c. 120 kg/mCross-sectional tolerances/Straighteness tolerances: - Dimensional tolerances by agreement up to 0.05 mm, depending on cross- section and materials - Straightness tolerances and twist: 1mm/m on supply length or by special agreementSurface: - cold drawnMaterials/Treatments - nearly all quality and stainless steels in the iron and steel list, special steels, non-ferrous heavy metal alloys - all required heat treatments are available
During hot extrusion a round steel billet is pre-heated and, after leaving the furnace, is pushed throuh a forming die into a profile bar using a ram with an extrusion ...
During the production of special profiles by hot rolling the input billet or slab is formed into lengths up to 70 m using two oppositely rotating cylindrical rolls. ...