SLEEVE PRODUCTION METHOD

FIELD: processes for making seamless tubes, namely with use of screw rolling equipment. ^ SUBSTANCE: method comprises steps of reducing heated blank in three-roll pass formed by rolls turned by feed angle and having reduction portion; piercing blank in pass formed by mandrel, guiding tool and two ro...

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Bibliographic Details
Main Authors ROMANTSEV B.A, SEJDALIEV BREKESH, POLJAKOV K.A, SHIRJAEV V.K, FADEEV M.M, KHARITONOV E.A, GALKIN S.P, FROLOCHKIN V.V, MARCHENKO K.L, BAGAEV N.F, KUZNETSOV V.JU
Format Patent
LanguageEnglish
Russian
Published 10.02.2005
Edition7
Subjects
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL
PERFORMING OPERATIONS
PUNCHING METAL
ROLLING OF METAL
TRANSPORTING
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Summary:FIELD: processes for making seamless tubes, namely with use of screw rolling equipment. ^ SUBSTANCE: method comprises steps of reducing heated blank in three-roll pass formed by rolls turned by feed angle and having reduction portion; piercing blank in pass formed by mandrel, guiding tool and two rolls turned by feed angle and having piercing portions; reducing blank in three-roll pass at feed angle of rolls consisting 1.4 - 4.0, at inclination angle of generatrix of reduction portion relative to rolling axis consisting 1.3 - 5.6, and at percentage reduction value consisting 1.6 - 6.2 respectively of feed angle, inclination angle of generatrix of roll piercing portion to rolling axis and percentage reduction value before nose of mandrel during piercing process. ^ EFFECT: lowered quantity of technological waste caused by occurring of inner and outer films, improved accuracy of sleeves made by screw rolling, mainly of continuously cast billets. ^ 1 tbl, 3 ex
Bibliography:Application Number: RU20030129826