DE50011358D1 - Speed control method to minimize internal polygon formation - Google Patents

Speed control method to minimize internal polygon formation

Info

Publication number
DE50011358D1
DE50011358D1 DE50011358T DE50011358T DE50011358D1 DE 50011358 D1 DE50011358 D1 DE 50011358D1 DE 50011358 T DE50011358 T DE 50011358T DE 50011358 T DE50011358 T DE 50011358T DE 50011358 D1 DE50011358 D1 DE 50011358D1
Authority
DE
Germany
Prior art keywords
control method
speed control
polygon formation
path
revolutions
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.)
Expired - Lifetime
Application number
DE50011358T
Other languages
German (de)
Inventor
Hans Joachim Dr Ing Pehle
Peter Dr Ing Thieven
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.)
SMS Siemag AG
Original Assignee
SMS Demag AG
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 SMS Demag AG filed Critical SMS Demag AG
Priority to DE50011358T priority Critical patent/DE50011358D1/en
Application granted granted Critical
Publication of DE50011358D1 publication Critical patent/DE50011358D1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B21B17/14—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling without mandrel, e.g. stretch-reducing mills

Landscapes

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

Abstract

Process for controlling the tube wall thickness in a multi-structured continuous path reducing mill train having devices for measuring the tube wall thickness comprises keeping the whole path constant by computer-controlled changes of the revolutions of the drive motors and reducing the inner polygon formation to a minimum. Preferred Features: The revolution ratios in a roll stand group are increased by changing the revolutions of the drive motors and are reduced in another roll stand group at the same time so that the path of the tube remains constant.
DE50011358T 1999-08-24 2000-08-09 Speed control method to minimize internal polygon formation Expired - Lifetime DE50011358D1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE50011358T DE50011358D1 (en) 1999-08-24 2000-08-09 Speed control method to minimize internal polygon formation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19941163A DE19941163A1 (en) 1999-08-24 1999-08-24 Speed control method to minimize internal polygon formation
DE50011358T DE50011358D1 (en) 1999-08-24 2000-08-09 Speed control method to minimize internal polygon formation

Publications (1)

Publication Number Publication Date
DE50011358D1 true DE50011358D1 (en) 2005-11-24

Family

ID=7920125

Family Applications (2)

Application Number Title Priority Date Filing Date
DE19941163A Withdrawn DE19941163A1 (en) 1999-08-24 1999-08-24 Speed control method to minimize internal polygon formation
DE50011358T Expired - Lifetime DE50011358D1 (en) 1999-08-24 2000-08-09 Speed control method to minimize internal polygon formation

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE19941163A Withdrawn DE19941163A1 (en) 1999-08-24 1999-08-24 Speed control method to minimize internal polygon formation

Country Status (7)

Country Link
EP (1) EP1078700B1 (en)
JP (1) JP4113662B2 (en)
AT (1) ATE306993T1 (en)
CZ (1) CZ298954B6 (en)
DE (2) DE19941163A1 (en)
ES (1) ES2249229T3 (en)
RU (1) RU2247615C2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2127768B1 (en) * 2007-02-08 2014-10-01 Nippon Steel & Sumitomo Metal Corporation Reducer pass roll and reducer
RU2564194C2 (en) * 2013-07-04 2015-09-27 Открытое акционерное общество "Синарский трубный завод" (ОАО "СинТЗ") Hot-rolled tube manufacturing method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58167003A (en) * 1982-03-27 1983-10-03 Sumitomo Metal Ind Ltd Device for preventing thickness deviation of reducing mill
JPS61216811A (en) * 1985-03-22 1986-09-26 Nippon Kokan Kk <Nkk> Multi-stand continuous drawing and rolling method for metallic pipe
JPS62192210A (en) * 1986-02-17 1987-08-22 Kawasaki Steel Corp Method for controlling tube wall thickness for reducing mill

Also Published As

Publication number Publication date
ATE306993T1 (en) 2005-11-15
EP1078700B1 (en) 2005-10-19
JP2001071012A (en) 2001-03-21
EP1078700A2 (en) 2001-02-28
DE19941163A1 (en) 2001-03-01
CZ298954B6 (en) 2008-03-19
CZ20003105A3 (en) 2001-07-11
JP4113662B2 (en) 2008-07-09
RU2247615C2 (en) 2005-03-10
ES2249229T3 (en) 2006-04-01
EP1078700A3 (en) 2003-09-24

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: SMS SIEMAG AKTIENGESELLSCHAFT, 40237 DUESSELDO, DE