METHOD OF SOLID-ROLLED WHEELSET WORKPIECES PRESS FORMING Russian patent published in 2008 - IPC B21K1/28 B21H1/04 

FIELD: technological processes.

SUBSTANCE: workpiece heated up to deformation temperature is aligned in molding press tool and set between upper and lower plane-parallel parts of press tool. Setting is performed in the area that is limited by internal conical surface of process ring. Angle of cone of specified ring surface amounts to 12-15°. During setting internal surface of process ring is self-aligned with displaced volume of workpiece metal. For that purpose ring is displaced in radial directions by the value of up to 30 mm depending on direction of workpiece metal flow. Then set workpiece is extracted by puncheon displacement. Puncheon is installed in the upper part of molding press tool. In the process of setting lower end of puncheon is located at the level of press toll upper part lower plane.

EFFECT: higher precision of wheels and their better quality.

1 dwg, 1 tbl, 1 ex