METHOD FOR MANUFACTURING OF FORGED PIECES Russian patent published in 2006 - IPC B21J1/04 

FIELD: plastic working of metals, in particular, production of forged pieces with elongated axes from ingots and preformed blanks.

SUBSTANCE: method involves forging preliminarily heated blank in several stages combined with squeezing in two mutually perpendicular planes in four-striker forging apparatus. Each of upper and lower strikers of four-striker forging apparatus has two working portions divided by cuts. Each of two lateral strikers has one working portion extending into cuts of upper and lower strikers. First stage includes forging process performed in several passes combined with squeezing in vertical plane, with squeezing force of said processes exceeding squeezing force applied in horizontal plane by 20-80%, tilting after each squeezing process and feeding. Feeding value is defined from cited ratio. Second stage includes forging process combined with squeezing processes of equal force in two mutually perpendicular planes until blank surface is leveled.

EFFECT: improved quality of metal of forged pieces.

2 cl, 1 tbl, 1 ex