JPS5533835A - Plug mill device array - Google Patents

Plug mill device array

Info

Publication number
JPS5533835A
JPS5533835A JP10566778A JP10566778A JPS5533835A JP S5533835 A JPS5533835 A JP S5533835A JP 10566778 A JP10566778 A JP 10566778A JP 10566778 A JP10566778 A JP 10566778A JP S5533835 A JPS5533835 A JP S5533835A
Authority
JP
Japan
Prior art keywords
plug
plug mills
mills
vertical rolls
pipe end
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.)
Pending
Application number
JP10566778A
Other languages
Japanese (ja)
Inventor
Naoharu Kubota
Yasuto Sasaki
Toshinori Kuwabara
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.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP10566778A priority Critical patent/JPS5533835A/en
Publication of JPS5533835A publication Critical patent/JPS5533835A/en
Pending 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
    • B21B17/08—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 having one or more protrusions, i.e. only the mandrel plugs contact the rolled tube; Press-piercing mills
    • B21B17/12—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 having one or more protrusions, i.e. only the mandrel plugs contact the rolled tube; Press-piercing mills in a discontinuous process, e.g. plug-rolling mills

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)

Abstract

PURPOSE:To prevent bite defect and mis-rolling in plug mills by disposing a pair of cylinder (arc)-form (non)driven right and left vertical rolls behind the plug mills so as to align the pass lines of both and shaping the oblong at the pipe end part. CONSTITUTION:Non-driven vertical rolls having arc-form hole dies are disposed behind the return roll stand of the seamlss steel pipe plug mills in such a manner that their pass line aligns to the pass line of the plug mills. The pipe end part 4 which has been rolled by the plug mills to a horizontally oblong circle is screwed down and shaped from the right and left by a pair of the vertical rolls 5 to a circular shape. The right and left chocks 6 containing the vertical rolls 5 are contained laterally slidably in the outer frames 7 which support screw-down load. The chocks 6 are connected to the outer frames 7 by screw-down devices 8 and the vertical roll gap is so controlled by the devices 8 that the pipe end 4 assumes the specified shape. The roll gap is made approximately equal to the caliber opening length of the plug mills.
JP10566778A 1978-08-31 1978-08-31 Plug mill device array Pending JPS5533835A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10566778A JPS5533835A (en) 1978-08-31 1978-08-31 Plug mill device array

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10566778A JPS5533835A (en) 1978-08-31 1978-08-31 Plug mill device array

Publications (1)

Publication Number Publication Date
JPS5533835A true JPS5533835A (en) 1980-03-10

Family

ID=14413780

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10566778A Pending JPS5533835A (en) 1978-08-31 1978-08-31 Plug mill device array

Country Status (1)

Country Link
JP (1) JPS5533835A (en)

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