US3913368A - Tandem rolling mill - Google Patents

Tandem rolling mill Download PDF

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Publication number
US3913368A
US3913368A US503056A US50305674A US3913368A US 3913368 A US3913368 A US 3913368A US 503056 A US503056 A US 503056A US 50305674 A US50305674 A US 50305674A US 3913368 A US3913368 A US 3913368A
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US
United States
Prior art keywords
mill
rolling
strip
stands
stand
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
US503056A
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English (en)
Inventor
Werner W Eibe
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.)
Blaw Knox Co
Italimpianti of America Inc
Original Assignee
Blaw Knox Foundry and Mill Machinery Inc
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 Blaw Knox Foundry and Mill Machinery Inc filed Critical Blaw Knox Foundry and Mill Machinery Inc
Priority to US503056A priority Critical patent/US3913368A/en
Priority to CA232,029A priority patent/CA1047286A/en
Priority to IT50967/75A priority patent/IT1041255B/it
Priority to GB36317/75A priority patent/GB1519857A/en
Priority to DE19752539215 priority patent/DE2539215A1/de
Priority to JP10749375A priority patent/JPS546023B2/ja
Application granted granted Critical
Publication of US3913368A publication Critical patent/US3913368A/en
Assigned to BLAW-KNOX COMPANY reassignment BLAW-KNOX COMPANY MERGER (SEE DOCUMENT FOR DETAILS). EFFECTIVE DEC. 26, 1978. DELAWARE Assignors: AETNA-STANDARD ENGINEERING COMPANY, BLAW-KNOX CONSTRUCTION EQUIPMENT, INC.,, BLAW-KNOX EQUIPMENT, INC., BLAW-KNOX FOOD & CHEMICAL EQUIPMENT, INC., BLAW-KNOX FOUNDRY & MILL MACHINERY, INC., COPES-VULCAN, INC.
Assigned to WHITE CONSOLIDATED INDUSTRIES, INC. reassignment WHITE CONSOLIDATED INDUSTRIES, INC. MERGER (SEE DOCUMENT FOR DETAILS). EFFECTIVE DEC. 26, 1978 DISTRICT OF COLUMBIA Assignors: ATHENS STOVE WORKS, INC., BLAW-KNOX COMPANY, BULLARD COMPANY THE, DURALOY BLAW-KNOX, INC., FAYSCOTT, INC., GIBSON PRODUCTS CORPORATION, HUPP, INC., JERGUSON GAGE & VALVE COMPANY, KELIVINATOR INTERNATIONAL CORPORATION, KELVINATOR COMMERCIAL PRODUCTS, INC., KELVINATOR, INC., R-P & C VALVE, INC., WHITE SEWING MACHINE COMPANY, WHITE-SUNDSTRAND MACHINE TOOL, INC., WHITE-WESTINGHOUSE CORPORATION
Assigned to BLAW KNOX CORPORATION, A CORP OF DELAWARE reassignment BLAW KNOX CORPORATION, A CORP OF DELAWARE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: WHITE CONSOLIDATED INDUSTRIES, INC., A CORP OF DE.
Assigned to ITALIMPIANTI OF AMERICA INCORPORATED (ITALIMPIANTI), AIRPORT OFFICE PARK, ROUSER ROAD, BUILDING 4, CORAOPOLIS, PA. 15108 U.S.A., A NEW YORK CORP. reassignment ITALIMPIANTI OF AMERICA INCORPORATED (ITALIMPIANTI), AIRPORT OFFICE PARK, ROUSER ROAD, BUILDING 4, CORAOPOLIS, PA. 15108 U.S.A., A NEW YORK CORP. ASSIGNMENT OF ASSIGNORS INTEREST. EFFECTIVE JUNE 30, 1987 Assignors: BLAW KNOX CORPORATION
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B21B1/24—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 in a continuous or semi-continuous process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B2013/003—Inactive rolling stands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B2015/0057—Coiling the rolled product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/08—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts
    • B21B31/10—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts by horizontally displacing, i.e. horizontal roll changing

Definitions

  • tandem rolling mills had downtimes due to porter bar type roll changing of 15 to 20 percent.
  • the use of rapid roll changers reduces this downtime of the mill up to about one-half or more.
  • rapid roll changers still require a downtime of about five minutes.
  • the utilization time (i.e., the time the mill is actually used) could be increased another 5 to 6 percent by saving the downtime it takes to perform a rapid roll changing operation. This could bring the utilization time of a tandem cold roll mill to above the 90 percent level.
  • the general object of this invention is achieved by adding to a tandem rolling mill one more mill stand than is required by the mill to achieve the rolling of strip in the pass schedules for which the mill is designed.
  • the tandem rolling mill of the invention is provided with 6 mill stands
  • a prior art four stand cold rolling mill is provided with 5 mill stands, and so on.
  • the mill stands are designed so that each mill stand can achieve the rolling action of a preceding upstream mill stand.
  • the mill stands are designed such that each can operate throughout most of the speed range of the adjacent mill stand. Accordingly, a mill stand can be taken out of the rolling line for roll changing without interrupting the rolling action to any appreciable extent by adjusting the remaining operative mill stands and the substitute mill stand to achieve the necessary rolling conditions.
  • FIG. 1 is a side elevation of a continuous rolling mill in accordance with the invention in diagrammatic form
  • FIG. 2 is a graph showing a speed cone which illus trates the principles of the invention.
  • FIG. 3 is a chart showing a programmed roll changing procedure.
  • FIG. 1 there is shown a fully continuous tandem cold roll mill illustrating the invention.
  • the mill comprises six mill stands I, 2, 3, 4, 5 and 6 of the conventional four-high type.
  • a three roll bridle unit 18 is located adjacent the entry end of mill stand 1 and serves to control the tension of the strip delivered thereto.
  • Adjacent the bridle unit 18 is a mill entry section 20 comprising a pair of payoff reels 22 and 24 and a pair of flatteners 26 and 28.
  • Adjacent the mill entry section 20 is a strip cutting and joining section 30 which comprises a conventional cutting shear and welder for joining the ends of successive coils to be rolled.
  • the strip is fed to a looper section 32 comprising the usual loop cars driven back and forth along tracks to accumulate a predetermined length of strip to deliver strip to the mill stands continuously while a strip joining operation is performed in the strip cutting and joining section 30 as is conventional in the art.
  • a looper section 32 the strip is fed around a roller 34 to the bridle unit 18 from which it enters the mill stands.
  • the strip is delivered from the mill stand 6 to a dividing, shear and tension reel section 40 which comprises a pinch roll 42, a shear 44 and a pair of tension reels 46 and 48.
  • Adjacent section 40 is a coil delivery, inspection and strapping section 50 which comprises a coil transfer car 52, a circumferential and eye bander 54 and a delivery conveyor 56.
  • the drive means for each of the mill stands 1, 2, 3, 4, 5 and 6 are indicated at 61, 62, 63, 64, 65 and 66, respectively, and comprise motor driven speed reducers with speed ranges as will be described hereafter.
  • the automatic roll changing and setting means for each of the mill stands 1, 2, 3, 4, 5 and 6 are indicated schematically at 71, 72, 73, 74, and 76, respectively, and may take various forms which are well known in the art. Such means operate by computer signal to set the roll gap or bite (gauge) and/or effect a roll changing operation.
  • the computer 80 controls the entire automatic operation of the rolling mill and controls, for example, the whole mass flow of the rolling mill, the speed, the amount of reduction, and dynamic gauge changes.
  • the computer 80 is arranged to set up each stand for rolling a desired pass schedule as is conventional in operational computers for continuous rolling mills in use today.
  • the computer 80 is arranged to control the drive means 61-66 and the automatic roll changing and setting means 71-76 for the mill stands l-6, respectively, for programmed roll changing, as will be more fully described hereafter.
  • the strip is fed from the coil on payoff reel 22 through the strip cutting and joining section 30 and the looper 32 and around the roller 34 to the bridle unit 18 from which it enters the mill stand 1.
  • the strip is rolled by five of the six mill stands 1 to 6 which are set by the computer 80 to the proper rolling condition for the pass schedule being rolled.
  • the trailing end is joined with the beginning end of a coil on the payoff reel 24.
  • the coil on the payoff reel 24 is passed through the flattener 26 to the strip cutting and joining section 30 where it is joined with the trailing end of the coil just paid off from reel 22.
  • strip is continued to be fed to the mill stands from the looper section 32 to thereby maintain a continuous supply of strip for rolling.
  • a fully continuous rolling operation is maintained by alternately supplying coils from the payoff reels 22 and 24 and by joining in the strip cutting and joining section 30 the trailing end of the coil being rolled to the beginning end of the new coil.
  • Conventional rolling may be performed by delivering strip from a coil on payoff reel 24 through the flattener 28 and the bridle unit 18 directly to the mill stand. This alternate is shown by the dashed arrow line in FIG. 1.
  • the strip is passed alternately to one of the tension reels 46 and 48 whereat the strip is coiled.
  • the rolled coil is then transferred to the circumferential and eye bander 54 by the conveyor 56. From the bander 54, the rolled coil continues to move along the delivery conveyor 56 for removal as is conventional in the art. Some coils are taken at random off conveyor 26 by the coil car 52 for inspection.
  • the utilization time of the mill is increased by the addition of one mill stand more than is required for rolling the pass schedules for which the mill is designed.
  • FIG. 2 shows a speed cone type of graph as is conventionally used in the art in designing a mill 'for rolling a group of random pass schedules.
  • the bottom horizontal line of the graph indicates the entry speed and the speed at each of the six mill stands at equally spaced locations.
  • the gear ratio and the motor horsepower for each of the six mill stands At the top of FIG. 2 there is a chart showing the essential conditions of four random pass schedules A, B, C and D. These conditions include the entry gauge, the delivery gauge, the total elongation, the entry speed into the first mill stand, the delivery speed and the theoretical production.
  • the pass schedules A to D are shown graphically by indicating the speed at which each of the five mill stands in the rolling line must operate to perform the strip reduction required for that mill stand.
  • the designer of the mill also adds to the graph what is known in the art as a speed cone which comprises the two lines [-1, so as to be certain that each of the mill stands in the rolling line can be operated at the speeds required for each of the pass schedules.
  • the lower line I of the speed cone passes through the minimum or base speeds of the mill stands 1 through 6.
  • the upper line I of the speed cone passes through the maximum speeds of the mill stands 1 through 6.
  • the mill stand 1 can operate in a speed range of between 686 and 2058 feet per minute (FPM) which is sufficient to cover each of the speeds required by the pass schedules A through D at the entry end.
  • FPM feet per minute
  • mill stand 5 can operate in a speed range of 2050 to 6150 FPM which is sufficient to cover the speeds required by the pass schedules A through D at the delivery end. This is also confirmed by viewing FIG. 2.
  • the speed ranges for each of the mill stands 2, 3 and 4 is also sufficient to cover the speeds for each of the pass schedules A through D as is apparent from FIG. 2.
  • mill stand 1 is operated at a delivery speed of about 900 FPM.
  • mill stand 2 is operated at a delivery speed of about 1600 FPM, mill stand 3 is operated at about 2700 FPM, mill stand 4 is operated at about 4175 FPM and mill stand 5 is operated at 6000 FPM.
  • the computer is programmed to perform the gauge settings for each mill stand 1 to 6 and control the appropriate drive means 61 to 66 to drive the mill stands 1 to 6 at the speed corresponding to the gauge setting in accordance with pass schedule A.
  • each of the mill stands is designed to be driven in a speed range covering most of the speed range of a preceding mill stand. This is apparent from a consideration of the graph shown in FIG. 2.
  • a second speed cone comprising lines II and II is shown in FIG. 2.
  • This speed cone represents the condition when the mill stand 1 is out of the rolling line for a roll change and each of the mill stands 2, 3, 4, 5 and 6 is shifted to cover the speed of a preceding mill upstream thereof.
  • This shifting is illustrated in FIG. 2 by the horizontal arrow lines extending from lines II to lines IIII.
  • the speed cone II--II embraces the pass schedules A through D wherefore the design is such that all of these pass schedules can be rolled by any appropriate combination of the mill stands, i.e., when anyone of the mill stands 1 to 6 is taken out of the rolling line for a roll change.
  • motor speed ranges employed to achieve the above-described flexibility of rolling is achieved by utilizing a 3 to 1 speed range ratio.
  • Equipment of this type is readily available in the art.
  • FIG. 3 illustrates a typical computer programmed roll change schedule in accordance with the invention.
  • This schedule takes into account that the mill stands near the end of the rolling line are changed more often than the front ones, although any variation in the program is possible.
  • the sequence of roll changing progresses downwardly as viewed in FIG. 3.
  • mill stands 1 through 5 are active while the rolls for mill stand 6 are changed.
  • the mill stands 1 through 5 are, of course, set for the speed indicated by the pass schedule such as those shown at A through D in FIG. 2.
  • the next row illustrates what occurs when the rolls for mill stand 5 are changed.
  • mill stands 1 through 4 remain active at their previous setting while stand 6 is reset to take over the rolling action of the stand 5. This mode of operation is illustrated in FIG. 1.
  • the next row illustrates what occurs when mill stand 4 is changed.
  • stands 1, 2, 3 and 5 remain active at their previous setting and mill stand 5 is set to take over the rolling action of mill stand 4.
  • the next row illustrates the changing of mill stand 6 again in which case mill stands I through 5 perform the rolling operation in accordance with the pass schedule.
  • the next line illustrates what occurs when mill stand 5 is changed and this is described above.
  • the next line illustrates what occurs when mill stand 2 is changed.
  • stands 1 and 6 remain active at their previous setting and mill stands 3, 4 and 5 are set to take over the rolling action of mill stands 2, 3 and 4, respectively.
  • the roll changing program then continues back with a roll change for mill stand 6 as illustrated in the top row of the chart shown in FIG. 3 and is continuously repeated under the control of the computer 80 in the progression indicated on this chart.
  • the entire program is under the control of the computer 80 which sets the drive means 61 through 66 and actuates the roll changing and setting means 71 through 76 to achieve the sequence of operation set in the program.
  • the computer 80 controls the bite of the stands such that while the mill stand which requires roll changing is having its rolls withdrawn from contact with the strip, the gauge and speed of stands downstream of the stand being changed or the stand previously changed are set to take over the rolling action of the stand upstream thereof.
  • the rolls to be changed can be removed whenever it is convenient without affecting the production.
  • the strip can be moved slowly or it can be stopped momentarily. However, this involves very little or no loss of strip or reduction in the production of the mill.
  • a tandem rolling mill comprising:
  • said plurality of mill stands being adapted to roll strip in accordance with a predetermined group of pass schedules so designed that all passes of each schedule are required to produce said desired strip reduction
  • the drive means for each mill stand having a speed range covering most of the speed range of the drive means for a mill stand immediately upstream thereof and a maximum speed greater than the maximum speed of the drive means for a mill stand immediately upstream thereof.
  • a rolling mill according to claim 1 including means for controlling said drive means to operate all of said mill stands except one in any combination of mill stands to roll strip in accordance with said group of pass schedules.
  • a rolling mill including means for changing the rolls of each of said mill stands, and means for controlling said drive means and said roll changing means in a programmed sequence so that the roll changing means for each mill stand and a corresponding drive means is out of operation a predetermined sequence.
  • a fully continuous rolling mill comprising:
  • mill stands arranged in tandem in a rolling line for successively rolling a strip of material to reduce the thickness thereof to a desired thick ness in a single pass through said mill stands,
  • said plurality of mill stands being adapted toroll strip in accordance with a predetermined group of pass schedules so designed that all passes of each schedule are required to produce the desired strip reduction,

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Metal Rolling (AREA)
US503056A 1974-09-04 1974-09-04 Tandem rolling mill Expired - Lifetime US3913368A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US503056A US3913368A (en) 1974-09-04 1974-09-04 Tandem rolling mill
CA232,029A CA1047286A (en) 1974-09-04 1975-07-22 Tandem rolling mill with additional mill stand
IT50967/75A IT1041255B (it) 1974-09-04 1975-08-14 Perfezionamento nei laminatoi in tandem
DE19752539215 DE2539215A1 (de) 1974-09-04 1975-09-03 Tandem-walzwerk
GB36317/75A GB1519857A (en) 1974-09-04 1975-09-03 Tandem rolling mill
JP10749375A JPS546023B2 (enrdf_load_stackoverflow) 1974-09-04 1975-09-04

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US503056A US3913368A (en) 1974-09-04 1974-09-04 Tandem rolling mill

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US3913368A true US3913368A (en) 1975-10-21

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Application Number Title Priority Date Filing Date
US503056A Expired - Lifetime US3913368A (en) 1974-09-04 1974-09-04 Tandem rolling mill

Country Status (6)

Country Link
US (1) US3913368A (enrdf_load_stackoverflow)
JP (1) JPS546023B2 (enrdf_load_stackoverflow)
CA (1) CA1047286A (enrdf_load_stackoverflow)
DE (1) DE2539215A1 (enrdf_load_stackoverflow)
GB (1) GB1519857A (enrdf_load_stackoverflow)
IT (1) IT1041255B (enrdf_load_stackoverflow)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2605254A1 (fr) * 1986-10-15 1988-04-22 Bwg Bergwerk Walzwerk Procede et train de laminage pour la fabrication de bandes metalliques dans un processus de laminage
US4882923A (en) * 1985-02-25 1989-11-28 Nippon Steel Corporation Continuous mill plant for rolling steel plates
US6023831A (en) * 1997-03-24 2000-02-15 Mannesmann Aktiengesellschaft Process for producing metal-sheathed strands, especially glass fiber cables
US20060010952A1 (en) * 2002-11-05 2006-01-19 Marc Valence Method for increasing the range of production of a metal product rolling installation and installation therefor
CN102066015B (zh) * 2008-06-19 2014-10-08 西门子Vai金属科技有限公司 更换连续行进钢带所用轧机中的辊的方法
CN105945071A (zh) * 2016-06-24 2016-09-21 燕山大学 一种esp无头轧制中精轧机组在线换辊设备及方法
CN106269888A (zh) * 2016-10-17 2017-01-04 燕山大学 一种实现esp精轧机组在线换辊的逆流换辊方法
CN109201758A (zh) * 2018-11-13 2019-01-15 燕山大学 一种esp无头轧制中精轧机组及轧制方法
CN120394571A (zh) * 2025-07-02 2025-08-01 承德建龙特殊钢有限公司 钢管连轧参数确定、壁厚控制方法、装置、设备及介质

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT380188B (de) * 1982-03-05 1986-04-25 Voest Alpine Ag Anlage zum warmwalzen von band- oder tafelfoermigem walzgut
DE19605566A1 (de) * 1996-02-15 1997-03-27 Bosch Gmbh Robert Vorrichtung und Verfahren zum Zuführen eines plastisch verformbaren Massestrangs zu einer Bearbeitungsstation
DE102009060828A1 (de) * 2009-04-02 2010-10-14 Sms Siemag Ag Walzanlage zum kontinuierlichen Walzen von bandförmigem Walzgut

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3331232A (en) * 1967-07-18 Method for rolling strip metal
US3754426A (en) * 1971-02-25 1973-08-28 Wean United Inc Roll changing arrangement for a rolling mill

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5334582B2 (enrdf_load_stackoverflow) * 1973-09-12 1978-09-21

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3331232A (en) * 1967-07-18 Method for rolling strip metal
US3754426A (en) * 1971-02-25 1973-08-28 Wean United Inc Roll changing arrangement for a rolling mill

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4882923A (en) * 1985-02-25 1989-11-28 Nippon Steel Corporation Continuous mill plant for rolling steel plates
FR2605254A1 (fr) * 1986-10-15 1988-04-22 Bwg Bergwerk Walzwerk Procede et train de laminage pour la fabrication de bandes metalliques dans un processus de laminage
US6023831A (en) * 1997-03-24 2000-02-15 Mannesmann Aktiengesellschaft Process for producing metal-sheathed strands, especially glass fiber cables
US7665339B2 (en) 2002-11-05 2010-02-23 Vai Clecim Method for increasing the range of production of a metal product rolling installation and installation therefor
US20080115551A1 (en) * 2002-11-05 2008-05-22 Vai Clecim Method for increasing the range of production of a metal product rolling installation and installation therefor
US7481089B2 (en) * 2002-11-05 2009-01-27 Siemens Vai Metals Technologies Sas Method for increasing the range of production of a metal product rolling installation and installation therefor
US20060010952A1 (en) * 2002-11-05 2006-01-19 Marc Valence Method for increasing the range of production of a metal product rolling installation and installation therefor
CN102066015B (zh) * 2008-06-19 2014-10-08 西门子Vai金属科技有限公司 更换连续行进钢带所用轧机中的辊的方法
CN105945071A (zh) * 2016-06-24 2016-09-21 燕山大学 一种esp无头轧制中精轧机组在线换辊设备及方法
CN106269888A (zh) * 2016-10-17 2017-01-04 燕山大学 一种实现esp精轧机组在线换辊的逆流换辊方法
CN106269888B (zh) * 2016-10-17 2018-04-06 燕山大学 一种实现esp精轧机组在线换辊的逆流换辊方法
CN109201758A (zh) * 2018-11-13 2019-01-15 燕山大学 一种esp无头轧制中精轧机组及轧制方法
CN120394571A (zh) * 2025-07-02 2025-08-01 承德建龙特殊钢有限公司 钢管连轧参数确定、壁厚控制方法、装置、设备及介质

Also Published As

Publication number Publication date
CA1047286A (en) 1979-01-30
GB1519857A (en) 1978-08-02
DE2539215A1 (de) 1976-03-18
JPS5152351A (enrdf_load_stackoverflow) 1976-05-08
JPS546023B2 (enrdf_load_stackoverflow) 1979-03-23
IT1041255B (it) 1980-01-10

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Owner name: WHITE CONSOLIDATED INDUSTRIES, INC.

Free format text: MERGER;ASSIGNORS:BLAW-KNOX COMPANY;KELVINATOR, INC.;WHITE-WESTINGHOUSE CORPORATION;AND OTHERS;REEL/FRAME:003926/0372

Effective date: 19781221

Owner name: BLAW-KNOX COMPANY

Free format text: MERGER;ASSIGNORS:AETNA-STANDARD ENGINEERING COMPANY;BLAW-KNOX CONSTRUCTION EQUIPMENT, INC.,;BLAW-KNOX EQUIPMENT, INC.;AND OTHERS;REEL/FRAME:003926/0382

Effective date: 19781221

AS Assignment

Owner name: BLAW KNOX CORPORATION, ONE OLIVER PLAZA, PITTSBURG

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST. EFFECTIVE SEPT. 27, 1985;ASSIGNOR:WHITE CONSOLIDATED INDUSTRIES, INC., A CORP OF DE.;REEL/FRAME:004532/0913

Effective date: 19851017

AS Assignment

Owner name: ITALIMPIANTI OF AMERICA INCORPORATED (ITALIMPIANTI

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST. EFFECTIVE JUNE 30, 1987;ASSIGNOR:BLAW KNOX CORPORATION;REEL/FRAME:004936/0554

Effective date: 19870626