FIELD: production of articles with axial cavity, possibly in forging and forging press shops of machine engineering and metallurgical plants. SUBSTANCE: method comprises steps of making hollow blank from cylindrical one by deforming initial blank in radially forging machine with use of smooth mandrel at deformation degree equal to 0.6-0.9%. Reduction operations are made alternatively at each plane at tilting blank for creating in its axial zone tension stresses causing axial ruptures. Presence of mandrel in axial zone allows to make opening with insignificant efforts. It is favorable for making hollow blanks having ratio of their length to diameter of their opening more than 10. EFFECT: decreased labor consumption, enlarged manufacturing possibilities. 1 tbl
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Authors
Dates
1997-07-10—Published
1990-02-01—Filed