FIELD: plastic working of metals, possibly in forging shops of metallurgical and machine engineering plants for making motor vehicle wheels and similar articles.
SUBSTANCE: method comprises steps of preparing initial blank; then forming intermediate semi-finished product in the form of cup having shaped bottom, wall, thickened portion in zone of wall-bottom transition restricted at inner side of cup by surface of revolution, by annular protrusion on outer end of bottom and by flange on end of wall; forming flange of wall due to applying axial effort to its end at increasing wall thickness while keeping stable diametrical dimensions at inner side of wall; then finally shaping bushing due to expanding wall until final diametrical dimensions of its flange and deforming annular protrusion on cup bottom to other flange; restricting the last in peripheral zone of its outer end by cone surface of revolution having apex in axis of bushing; selecting conicity angle of said surface in predetermined range; realizing heat treatment of formed bushings.
EFFECT: enhanced strength characteristics of wheels in condition of cyclic loading during exploitation.
2 dwg, 1 ex
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Authors
Dates
2005-06-10—Published
2003-12-23—Filed