Cleaning dies for hot forming of aluminum sheets

Details Cleaning dies for hot forming of aluminum sheets Cleaning dies for hot forming of aluminum sheets

2011-08-16

2011-08-16

Jones, David B (Department: 3725)

Metal deforming

With cleaning, descaling, or lubrication of work or product

Mechanical cleaning

C072S041000, C072S043000, C072S045000, C072S053000, C451S038000, C451S039000, C451S041000

Reexamination Certificate

active

07997110

ABSTRACT:
In substantial volume production operations involving hot blow forming or hot stamping of aluminum alloy sheet workpieces, debris largely comprised of particles of aluminum alloy material adheres to critical forming surfaces of the heated steel tools. This debris mars forming surfaces and causes defects in aluminum alloy parts formed against them. Such aluminum-rich debris may be reactively transformed to change its adherent properties and removed from tool surfaces without removing the heated tool from production. In one embodiment, a hot sacrificial magnesium sheet may be formed on the tool(s) to alloy with aluminum debris and carry it from the forming surface.

REFERENCES:
patent: 4998428 (1991-03-01), Rechenbach
patent: 6450396 (2002-09-01), Krajewski
patent: 6516645 (2003-02-01), Morales et al.
patent: 7156926 (2007-01-01), Voges
patent: 2010/0192655 (2010-08-01), Carter et al.

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