СПОСОБ ИЗГОТОВЛЕНИЯ БОЛТОВ С КАНАВКАМИ

摘要

FIELD: plastic metal working, possibly manufacture of fastening rod type parts with grooved rod. ^ SUBSTANCE: method comprises steps of cutting off measured length blank; upsetting it for shaping bolt head; reducing rod; trimming hexahedron; forming grooves and knurling thread. Grooves are formed on rod with use of reducing die. All steps of method are realized in cold heading automatic machine. ^ EFFECT: enhanced efficiency for making high-quality bolts. ^ 1 dwg