METHOD AND MILL FOR PROJECTION FORMING OF HIGH-STIFFNESS SHEETS Russian patent published in 2014 - IPC B21D5/06 B21D13/06 

FIELD: machine building.

SUBSTANCE: lengthwise crimps are formed on trial-length sheet by feeding forming ledges of the first forming roll into second forming device pass at the sheet displacement along mill stand axis. Sheet is arranged and secured at second forming device. Second forming device is composed by a flat female die engaged with the roll that drives the latter in reverse displacement along mill stand axis. Note here that said flat female die includes lower support idle roll and some support rolls and sheet fasteners.

EFFECT: lower metal input and power consumption.

6 cl, 3 dwg