METHOD AND FORMING TOOL FOR HOT FORMING AND PRESS HARDENING GALVANIZED WORKPIECES OF SHEET STEEL (VERSIONS) Russian patent published in 2017 - IPC B21D37/16 B21D22/20 C21D1/673 

Abstract RU 2606359 C2

FIELD: metal processing.

SUBSTANCE: invention relates to metal forming, in particular, to a method for hot forming and press hardening plate-shaped workpieces of galvanized sheet steel. workpiece is heated to a temperature above austenitisation temperature and is then formed and quenched in a cooled forming tool having a punch and a female mold. Female mold used is coated in its drawing edge region with material in a material-uniting manner, having a thermal conductivity lower than thermal conductivity of portion of the female mold adjacent to drawing edge region, and comes into contact with workpiece. Surface of coating deposited in edge region facing workpiece has a dimension extending along drawing edge, value of which exceeds positive radius of drawing die.

EFFECT: reduced probability of crack formation in workpieces.

20 cl

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RU 2 606 359 C2

Authors

Banik, Yanko

Sikora, Sasha

Kejer, Mariya

Shtruppek, Tomas

Dates

2017-01-10Published

2012-10-16Filed