| 摘要 |
FIELD: process engineering.SUBSTANCE: invention relates to metal forming and may be used in, for example, production of nuclear reactor containments. Proposed device comprises forming female die 6 and male die 9. Male die 9 is arranged in lengthwise direction to enter into blind cavity 61 or female die 6 to extrude the billet. Male die 9 consists of extrusion shaft 8 and forming head 93 coupled therewith. Cross-section area of forming head 93 perpendicular to female die lengthwise axis is smaller than that of extrusion shaft 92 arranged perpendicular to lengthwise axis of female die 6. Male die 9 can turn about lengthwise axis of female die 6. Note here that sequential deformation of billet by forming head 93 is performed in appropriate zones. Forming head center has recess to generate 3D compression strains in billet material.EFFECT: uniform wall thickness, high reliability and strength, ruled out cracks and flaws.18 cl, 15 dwg |
