FIELD: cold plastic metal working, possibly manufacture of parts such as ball-head pins. SUBSTANCE: method comprises steps of cutting off blank; first and second operations of upsetting head; finally reducing rod and finally upsetting ball head; simultaneously at preliminarily reducing rod and cone during first transition of upsetting operation, reducing underhead cylindrical portion whose diameter is equal to final diameter of underhead of ready part; selecting diameter of blank in range (1.05 - 1.1)dcyl, where dcyl - diameter of cylindrical portion of underhead of ready part. EFFECT: enhanced strength of tool, improved quality of ready parts. 1 dwg
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Authors
Dates
2003-09-27—Published
2002-04-29—Filed