Title:
METHOD FOR PRODUCING HOT-ROLLED HOLLOW PROFILED ELEMENTS HAVING A RECTANGULAR CROSS-SECTION AND SMALL EDGE RADII
Document Type and Number:
WIPO Patent Application WO/2011/023167
Kind Code:
A3
Abstract:
The invention relates to a method for producing hot-rolled hollow profiled elements (1) made from steel and having a rectangular or square cross-section, a substantially circular pipe blank produced seamlessly by hot rolling or cold-rolled and welded and having a defined nominal outside diameter (D) first being produced and then formed into a hollow profiled element (1) having the required cross-section at a forming temperature and the visible edges (C1 and C2) of the hollow profiled elements (1) having a value < 1.5 x t (t = wall thickness). For a specified profiled element cross-section, the pipe blank to be inserted into the profile rolling mill has a nominal outside diameter (D) that is determined from a reduction ratio of the pipe blank to be achieved and the hollow profiled element dimensions to be achieved, the reduction ratio lying in a range from -2% to -13% and being determined according to the following formula: reduction ratio R [%] = [(2 x (H + W)) - π x D] x 100 % [2 x (H + W)], D being the nominal outside diameter of the pipe blank and H5B being the edge length of the hollow profiled element (height, width).
Inventors:
HELTEN BURKHARD (DE)
MUELLER THOMAS (DE)
TRAPP NICOLAS (DE)
ARZT NORBERT (DE)
SCHMITZ THORSTEN (DE)
MUELLER THOMAS (DE)
TRAPP NICOLAS (DE)
ARZT NORBERT (DE)
SCHMITZ THORSTEN (DE)
Application Number:
PCT/DE2010/000974
Publication Date:
April 28, 2011
Filing Date:
August 12, 2010
Export Citation:
Assignee:
V&M DEUTSCHLAND GMBH (DE)
HELTEN BURKHARD (DE)
MUELLER THOMAS (DE)
TRAPP NICOLAS (DE)
ARZT NORBERT (DE)
SCHMITZ THORSTEN (DE)
HELTEN BURKHARD (DE)
MUELLER THOMAS (DE)
TRAPP NICOLAS (DE)
ARZT NORBERT (DE)
SCHMITZ THORSTEN (DE)
International Classes:
B21D47/01; B21D3/14; E04C3/32
Foreign References:
| JPH08238520A | 1996-09-17 | |||
| JPH0938722A | 1997-02-10 | |||
| GB2390125A | 2003-12-31 | |||
| JP2006009380A | 2006-01-12 | |||
| DE102007031142A1 | 2009-01-15 | |||
| JPS6117323A | 1986-01-25 |
Other References:
See also references of EP 2470315A2
Attorney, Agent or Firm:
MEISSNER, Peter E. (Hohenzollerndamm 89, Berlin, DE)
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