METHOD OF THIXOFORMING OF CYLINDRICAL BILLETS AND DEVICE TO PREPARE SAID BILLETS FOR THIXOFORMING Russian patent published in 2010 - IPC B21J5/06 B21J13/02 

FIELD: process engineering.

SUBSTANCE: invention relates to metal forming and can be used in producing various parts from cylindrical billets, mainly from, aluminium alloys. Prepared cylindrical billet is deformed in preheated press tool comprising male and female dies. Said preparation is performed by gapless arrangement of billet in closed shell, heating together with closed shell, removal of said shell and placing of said shell in female die. Gapless arrangement means fitting said billet into shell to be closed and subjected to cold tapping down till there are no gaps. Said shell has through axial bore. Said shell accommodates plunger and cover fitted on shell bottom. There are an extractor placed in shell bore to stay in contact with cover and interact with male die and a circular thrust. Said thrust can be arranged on female die for shell face to be arranged thereon. Aforesaid male and female dies have bores with sizes complying with those of cover and plunger.

EFFECT: higher quality of produced parts.

2 cl, 6 dwg