JPS57193218A - Mean thickness controlling method in rolling step of seamless steel pipe - Google Patents

Mean thickness controlling method in rolling step of seamless steel pipe

Info

Publication number
JPS57193218A
JPS57193218A JP56077350A JP7735081A JPS57193218A JP S57193218 A JPS57193218 A JP S57193218A JP 56077350 A JP56077350 A JP 56077350A JP 7735081 A JP7735081 A JP 7735081A JP S57193218 A JPS57193218 A JP S57193218A
Authority
JP
Japan
Prior art keywords
sectional area
information
inputted
delivery side
stored
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
JP56077350A
Other languages
Japanese (ja)
Inventor
Yoichi Naganuma
Masato Uchida
Sumitada Kakimoto
Yoshiyuki Ebina
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 JP56077350A priority Critical patent/JPS57193218A/en
Publication of JPS57193218A publication Critical patent/JPS57193218A/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
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/78—Control of tube rolling
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
    • B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
    • B21B19/04—Rolling basic material of solid, i.e. non-hollow, structure; Piercing, e.g. rotary piercing mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
    • B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
    • B21B19/06—Rolling hollow basic material, e.g. Assel mills
    • B21B19/10—Finishing, e.g. smoothing, sizing, reeling

Landscapes

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

Abstract

PURPOSE:To make a tube mean thickness value at the delivery side of a sizing mill constant, by combining and controlling a roll screw-down position of a plug mill and a motor rotational frequency ratio of a sizing mill, in a Mannesmann plug mill pipe manufacturing method. CONSTITUTION:As for each billet from a furnace 1, its number and unit weight are stored in a device 3, and a set value A of a roll screw-down position, etc. when and after rolling a pipe by a device, and tube length l1 are inputted to the device 3. In accordance with inputted information of the device 3, a target sectional area, and an actual value of the sectional area, a roll screw-down position B is commanded so that the sectional area at the delivery side becomes a target value, and the device 5 executes 1 pass and 2 passes, respectively. Length l2 in that case and a rolling condition, for instance, B are inputted to the device 3, information 7 is stored in order to control a device 9, and also length l3 is stored. In accordance with information inputted to the device, and its storage, sectional area information of at the delivery side of the devices 5, 8 is generated, a motor rotational frequency ratio C is calculated by said information, the actual value and the target sectional area at the delivery side of the device 9, and it is commanded to the device 9.
JP56077350A 1981-05-23 1981-05-23 Mean thickness controlling method in rolling step of seamless steel pipe Pending JPS57193218A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56077350A JPS57193218A (en) 1981-05-23 1981-05-23 Mean thickness controlling method in rolling step of seamless steel pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56077350A JPS57193218A (en) 1981-05-23 1981-05-23 Mean thickness controlling method in rolling step of seamless steel pipe

Publications (1)

Publication Number Publication Date
JPS57193218A true JPS57193218A (en) 1982-11-27

Family

ID=13631460

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56077350A Pending JPS57193218A (en) 1981-05-23 1981-05-23 Mean thickness controlling method in rolling step of seamless steel pipe

Country Status (1)

Country Link
JP (1) JPS57193218A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6309676B1 (en) 1998-07-17 2001-10-30 Joan Lewandowski Pet breath ameliorator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6309676B1 (en) 1998-07-17 2001-10-30 Joan Lewandowski Pet breath ameliorator

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