CA2076402A1 - Mandrel mill for seamless steel tubes - Google Patents

Mandrel mill for seamless steel tubes

Info

Publication number
CA2076402A1
CA2076402A1 CA 2076402 CA2076402A CA2076402A1 CA 2076402 A1 CA2076402 A1 CA 2076402A1 CA 2076402 CA2076402 CA 2076402 CA 2076402 A CA2076402 A CA 2076402A CA 2076402 A1 CA2076402 A1 CA 2076402A1
Authority
CA
Canada
Prior art keywords
roll
mandrel mill
groove
seamless steel
steel tubes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA 2076402
Other languages
French (fr)
Other versions
CA2076402C (en
Inventor
Toshio Imae
Hiromu Oka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2076402A1 publication Critical patent/CA2076402A1/en
Application granted granted Critical
Publication of CA2076402C publication Critical patent/CA2076402C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
    • B21B17/02—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel, i.e. the mandrel rod contacts the rolled tube over the rod length
    • B21B17/04—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel, i.e. the mandrel rod contacts the rolled tube over the rod length in a continuous process

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Control Of Metal Rolling (AREA)

Abstract

A mandrel mill for rolling seamless steel tubes includes a plurality of roll stands each having a pair of rolls defining a roll groove therebetween, an axis of the rolls of each roll stand being orthogonal to the axis of the rolls of the adjacent roll stands. The mandrel mill further includes a mandrel bar disposed in the roll grooves configured by the roll stands. The ratio between the radius of curvature of a groove bottom of the groove and a distance between the groove bottom of the roll groove of the first stand ranges from 0.46 to 0.54, and that of the second stand ranges from 0.48 to 0.52.
CA 2076402 1991-08-22 1992-08-19 Mandrel mill for seamless steel tubes Expired - Fee Related CA2076402C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP3233835A JPH07102369B2 (en) 1991-08-22 1991-08-22 Mandrel mill
JP233835/91 1991-08-22

Publications (2)

Publication Number Publication Date
CA2076402A1 true CA2076402A1 (en) 1993-02-23
CA2076402C CA2076402C (en) 1996-03-05

Family

ID=16961316

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2076402 Expired - Fee Related CA2076402C (en) 1991-08-22 1992-08-19 Mandrel mill for seamless steel tubes

Country Status (3)

Country Link
EP (1) EP0529943A3 (en)
JP (1) JPH07102369B2 (en)
CA (1) CA2076402C (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008119706A (en) 2006-11-09 2008-05-29 Sumitomo Metal Ind Ltd Mandrel mill, method of operation thereof, and method of manufacturing seamless pipe
JP5062522B2 (en) 2007-05-31 2012-10-31 住友金属工業株式会社 Mandrel mill and seamless pipe manufacturing method
CN114309076B (en) * 2020-09-30 2023-05-16 宝武特种冶金有限公司 Precision trimming method for ring hole type of seamless steel tube cold rolling mill

Also Published As

Publication number Publication date
JPH07102369B2 (en) 1995-11-08
CA2076402C (en) 1996-03-05
EP0529943A3 (en) 1993-06-30
JPH0550115A (en) 1993-03-02
EP0529943A2 (en) 1993-03-03

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed