METHOD OF TRIMMING ARTICLES Russian patent published in 1995 - IPC

FIELD: metal pressure forming. SUBSTANCE: method of trimming articles, comprising arrangement of an article into a trimming die, subsequent trimming operation with separation of metal, being trimmed, from peripheral portions of a head of the article by a punch at a side of its end surface and simultaneous resting of a bearing surface of the head on the trimming die, also comprises steps of trimming the head of the article upon resting of the head onto the die by a part of the bearing surface of the head and performing trimming of all or separate peripheral portions without supporting them by the trimming die; performing non-simultaneous separation of the metal, being trimmed, from the article and realizing the trimming operation at supporting by the die only the part of the bearing surface of the head, adjacent with the rod; at trimming heads of non-uniform thickness article performing the trimming operation of its peripheral portions, having less thickness, without supporting them by the trimming die and performing separation of the metal, being trimmed, from the article at first on the peripheral portions, having less thickness. EFFECT: enhanced efficiency at making rod-type article and trimming them. 5 cl, 4 dwg