TOOL FOR DIE FORGING OF CUP - SEMIFINISHED PRODUCT OF TRANSPORT VEHICLE WHEEL Russian patent published in 2006 - IPC B21K1/28 B21J13/02 

FIELD: plastic metal working, possibly in forging shops of metallurgical and machine engineering plants for making motor vehicle wheels and similar products.

SUBSTANCE: tool includes die, punch mounted in slide of press and shape part of knocking out member, both movable along die; annular pressure yoke and annular stop. Yoke has stepped cylindrical outer surface and through opening whose diameter corresponds to that of punch. Annular stop has through stepped opening. Upper step of die opening is cylindrical one and it has diameter corresponding to outer diameter of lower step of pressure yoke. Stepped opening of annular stop has lower step with diameter less than diameter of upper step of said opening and less than outer diameter of upper step of pressure yoke. Height of said step is less than depth of upper step of opening of annular stop.

EFFECT: enhanced geometry accuracy of semi-finished products of wheels.

2 dwg