Акціонерне Товариство "Дніпропетровський Трубний Завод"
Акционерное общество "Днепропетровский трубный завод"
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Priority to UA95052196ApriorityCriticalpatent/UA28182A/en
Publication of UA28182ApublicationCriticalpatent/UA28182A/en
A method of die forging of articles of ring type with precise open-end hole consists in sequential, for one stroke of press, upsetting billet, piercing and removal of inclines. Initial billet is consecutively pierced through by punch, upset and the opening is calibrated for one stroke of press. Upsetting is conducted until complete radial reduction of metal around the punch.
UA95052196A1995-05-041995-05-04method and die for die forging of articles of ring type
UA28182A
(en)
Side-wall electrical battery terminal cold forming method - involves initially forming lead slug with opening at one end and placing stainless steel nut in lead slug