TUBE PRODUCTION METHOD

FIELD: manufacture of tubes of hard-to-deform metals by extrusion. SUBSTANCE: method of making tubes of hard-to-deform metals and alloys comprises steps of selecting mean radius value of tubular blank at taking to account predetermined mean radius of ready tube according to next relation where - mea...

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Main Authors KURAPOVA N.A, IVANOV V.A, ZUEV A.F, KONOPLEV A.V, MEL'NIKOVA T.E, FEDOTOV N.A, KAMENEV S.A, ZHURAVLEV D.G, KOLMOGOROV G.L, KONOPLEV V.N
Format Patent
LanguageEnglish
Published 20.08.1998
Edition6
Subjects
AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL
MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL
PERFORMING OPERATIONS
PUNCHING METAL
TRANSPORTING
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Summary:FIELD: manufacture of tubes of hard-to-deform metals by extrusion. SUBSTANCE: method of making tubes of hard-to-deform metals and alloys comprises steps of selecting mean radius value of tubular blank at taking to account predetermined mean radius of ready tube according to next relation where - mean radius of tubular blank, mm; Rmean tube= R1 tube+ R2 tube/ 2 - mean radius of ready tube, mm; R1 bl , R2 bl , R1 tube , R2tube - outer and inner radius values of tubular blank and ready tube respectively, mm; ??- Poisson efficient of tube material; ψ - dimension-free parameter defining mechanical and physical properties of tube material; R = R2 tube / R1 tube - - relative parameter defining thickness of wall of ready tube; B = B = (7-18R+15R2-15R4+18R5-7R6).. EFFECT: elimination of afterdeformation rupture of extruded tubes caused by residual stresses. 2 dwg
Bibliography:Application Number: RU19960120621