JPS5568101A - Stabilizing method for unsymmetric rolling work - Google Patents

Stabilizing method for unsymmetric rolling work

Info

Publication number
JPS5568101A
JPS5568101A JP14193578A JP14193578A JPS5568101A JP S5568101 A JPS5568101 A JP S5568101A JP 14193578 A JP14193578 A JP 14193578A JP 14193578 A JP14193578 A JP 14193578A JP S5568101 A JPS5568101 A JP S5568101A
Authority
JP
Japan
Prior art keywords
friction factor
work
unsymmetric
work roll
case
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
JP14193578A
Other languages
Japanese (ja)
Inventor
Yukio Yarita
Kenji Kataoka
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
Kawasaki 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 Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP14193578A priority Critical patent/JPS5568101A/en
Publication of JPS5568101A publication Critical patent/JPS5568101A/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
    • B21B37/007—Control for preventing or reducing vibration, chatter or chatter marks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2267/00—Roll parameters
    • B21B2267/02—Roll dimensions
    • B21B2267/06—Roll diameter
    • B21B2267/065—Top and bottom roll have different diameters; Asymmetrical rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/06—Lubricating, cooling or heating rolls
    • B21B27/10—Lubricating, cooling or heating rolls externally

Landscapes

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

Abstract

PURPOSE: To place the neutral points within the contact arc between reducing rolls, and to prevent chattering, by properly changing the friction factor, when the rolling work with the unsymmetric reducing rolls falls into unstable rolling condition.
CONSTITUTION: During the unsymmetric rolling work with the upper and lower work rolls, in case of unstable rolling condition being caused when either one of neutral points in upper and lower faces of the material to be rolled comes off the inlet point or the outlet point, the countermeasures are taken as follows. That is, σ is taken for the tension, similarly, Kf for the mean deformation resistance, h for the sheet thickness, the suffixal numerals 0 for the inlet side and 1 for the outlet side; in case of σ1-σ0>Kf.lnhO/h1, the friction factor of surface of the work roll 2 of lower speed or of smaller diameter is increased, or inversely, the friction factor of surface of the work roll 3 of higher speed or of larger diameter is decreased. In case of σ1-σ0<Kf.lnhO/h1, the friction factor of surface of the work roll 2 of lower speed or smaller diameter is decreased, or inversely, the friction factor of surface of the work roll 3 of higher speed or of larger diameter is increased; by thus controlling the friction factor, the stable operation is made possible.
COPYRIGHT: (C)1980,JPO&Japio
JP14193578A 1978-11-17 1978-11-17 Stabilizing method for unsymmetric rolling work Pending JPS5568101A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14193578A JPS5568101A (en) 1978-11-17 1978-11-17 Stabilizing method for unsymmetric rolling work

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14193578A JPS5568101A (en) 1978-11-17 1978-11-17 Stabilizing method for unsymmetric rolling work

Publications (1)

Publication Number Publication Date
JPS5568101A true JPS5568101A (en) 1980-05-22

Family

ID=15303560

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14193578A Pending JPS5568101A (en) 1978-11-17 1978-11-17 Stabilizing method for unsymmetric rolling work

Country Status (1)

Country Link
JP (1) JPS5568101A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007068359A1 (en) * 2005-12-14 2007-06-21 Sms Demag Ag Method and computer program for controlling a rolling process

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007068359A1 (en) * 2005-12-14 2007-06-21 Sms Demag Ag Method and computer program for controlling a rolling process
US7854154B2 (en) 2005-12-14 2010-12-21 Sms Siemag Aktiengesellschaft Process and computer program for controlling a rolling process

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