METHOD FOR HELICAL PIERCING OF CAST BILLET

FIELD: rolled stock production, plastic working of metals, namely helical piercing processes. ^ SUBSTANCE: method comprises steps of guiding heated billet to working rolls turned by angle of feeding and expansion; piercing billet by means of plug mounted in pass formed by rolls and guiding tool. Fee...

Full description

Saved in:
Bibliographic Details
Main Authors PUMPJANSKIJ D.A, ROMANTSEV B.A, POLJAKOV K.A, GONCHARUK A.V, FADEEV M.M, MARCHENKO L.G, MARCHENKO K.L, BAGAEV N.F, FISKIN B.M
Format Patent
LanguageEnglish
Russian
Published 20.04.2005
Edition7
Subjects
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL
PERFORMING OPERATIONS
PUNCHING METAL
ROLLING OF METAL
TRANSPORTING
Online AccessGet full text

Cover

More Information
Summary:FIELD: rolled stock production, plastic working of metals, namely helical piercing processes. ^ SUBSTANCE: method comprises steps of guiding heated billet to working rolls turned by angle of feeding and expansion; piercing billet by means of plug mounted in pass formed by rolls and guiding tool. Feed angle value is in range 12 - 18°; expansion angle value is in range 6 - 10°. Reduction degree in restriction portion is in range 21 -35 % and it is realized with use of rolls having inlet cone angle equal to 4 -8°. Reduction degree of billet in front of nose of plug is normalized by means of mathematical expression given in description of invention. ^ EFFECT: possibility for making tubes with high accuracy geometry size and high quality inner and outer surfaces. ^ 1 dwg, 1 ex
Bibliography:Application Number: RU20040100259