EP0726100A1 - Walzeinheit - Google Patents

Walzeinheit Download PDF

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Publication number
EP0726100A1
EP0726100A1 EP95300774A EP95300774A EP0726100A1 EP 0726100 A1 EP0726100 A1 EP 0726100A1 EP 95300774 A EP95300774 A EP 95300774A EP 95300774 A EP95300774 A EP 95300774A EP 0726100 A1 EP0726100 A1 EP 0726100A1
Authority
EP
European Patent Office
Prior art keywords
roll
rolls
eccentric
openings
roll 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.)
Granted
Application number
EP95300774A
Other languages
English (en)
French (fr)
Other versions
EP0726100B1 (de
Inventor
Yoshikazu Takai
Hideo Kobayashi
Yoshio Kato
Tatsuya Ishihama
Harold E. Woodrow
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.)
Siemens Industry Inc
Original Assignee
Morgan Construction Co
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
Priority to ZA95883A priority Critical patent/ZA95883B/xx
Application filed by Morgan Construction Co filed Critical Morgan Construction Co
Priority to ES95300774T priority patent/ES2138704T3/es
Priority to DE69513137T priority patent/DE69513137T2/de
Priority to EP95300774A priority patent/EP0726100B1/de
Priority to AT95300774T priority patent/ATE186244T1/de
Publication of EP0726100A1 publication Critical patent/EP0726100A1/de
Application granted granted Critical
Publication of EP0726100B1 publication Critical patent/EP0726100B1/de
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
    • B21B1/16—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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section
    • B21B1/18—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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section in a 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
    • B21B13/08—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with differently-directed roll axes, e.g. for the so-called "universal" rolling process
    • B21B13/12—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with differently-directed roll axes, e.g. for the so-called "universal" rolling process axes being arranged in different planes
    • 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
    • B21B31/16—Adjusting or positioning rolls
    • B21B31/20—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis
    • B21B31/22—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis mechanically, e.g. by thrust blocks, inserts for removal
    • B21B31/26—Adjusting eccentrically-mounted roll bearings

Definitions

  • This invention relates to a rolling unit having at least two successive roll stands for rolling products such as steel bars or wire rods, in which the axis-to-axis distance between the rolls in one roll stand and those of the other roll stand is shortened so as to eliminate the need for interstand guides.
  • Rolling mills are known in which a plurality of roll stands are serially arranged along a pass line, and the product is rolled to a predetermined size by passing it through these roll stands.
  • Each roll stand is equipped with a pair of rolls disposed rotatably in a housing, and the product is passed through a roll pass defined by grooves in the rolls.
  • the pass sequence can be "oval-round” in which oval and round roll passes are alternately disposed sequentially.
  • the pass sequences can be "rhombic-square” in which rhombic and square roll passes are alternately disposed sequentially.
  • an oval-round pass sequence is usually employed to deliver a round product from the mill.
  • a roller guide is disposed at the inlet side of each round pass, so that the product can be fed in a proper orientation into the round pass and thus can be accurately rolled.
  • a similar guide is also disposed at the inlet side of each square pass so as to optimize area reductions.
  • a roll parting adjustment device In the rolling mill described above, a roll parting adjustment device must inevitably be employed for adjusting the clearance or "parting" between the roll pairs so as to adjust the cross-sectional dimensions of the product passing therebetween.
  • the roll parting adjustment device is designed to move one roll closer to or farther from the other roll, the latter roll being fixed at a predetermined position.
  • the position of the associated roller guide disposed in the rolling unit must be adjusted correspondingly, causing an attendant loss of valuable production time. Further, since misguiding of the product by the roller guide leads to defects, maintenance of guide bearings, checking of surface flaws on the guide rollers, checking of the rolling state of the rollers, etc. must frequently be carried out. It can also be pointed out that the roller guides disposed between the respective roll stands make the structure of the rolling equipment more complicated and costly.
  • housing posts for supporting the roll parting adjustment mechanisms are located on the inlet side and outlet side, the distance between the upstream roll stand and the downstream roll stand increases by the thickness of the posts. Additionally, the roller guides disposed between the roll stands also take up space, with the result that the overall length of the installation is disadvantageously increased.
  • a general objective of the present invention is to avoid or at least substantially mitigate the problems noted above by achieving a significant reduction in the distance between roll stands in a rolling mill.
  • a companion objective of the present invention is to eliminate the need for interstand guides, thereby substantially simplifying the task of adjusting the mill to accommodate different product sizes.
  • the rolling unit according to this invention consists of two roll stands, which are arranged in such a way that the rotational axes of the rolls in one roll stand are offset with respect to those of the rolls in the other roll stand by an angle of 90°, and the axis-to-axis distance between the rolls in the former and the rolls in the latter is not more than 1.2 times the diameter of these rolls.
  • the axis-to-axis distance between the rolls in one roll stand and the rolls in the other roll stand, which are arranged sequentially, is set to be not more than 1.2 times the diameter of these rolls, twisting of the product during the rolling process can effectively be prevented without having to resort to the use of interstand guides.
  • the overall design of the rolling unit is simplified, with attendant reductions in capital investment.
  • occurrence of defective products attributable to improper guide settings can be eliminated, and the intricate guide checking and maintenance operations also can be avoided.
  • the rolling unit can be downsized, the entire length of the installation is reduced, enabling efficient utilization of plant space.
  • rolling units 10 are employed as the sizing mills for finish rolling in the rolling mill shown in Fig. 12.
  • the rolling units 10 can suitably be employed in the intermediate line.
  • Each rolling unit 10 has three roll stands 12, 14, 16 arranged serially, with rolls 13, 15, 17 being arranged in such a way that the rotational axes of any downstream roll pair (15 or 17) is offset from those of the adjacent upstream roll pair (13 or 15) by an angle of 90°, as shown in Figs. 2 and 3.
  • the axes of the rolls 13 disposed in the first roll stand 12 located in the upstream position with respect to the direction of rolling a product 20 and those of the rolls 17 in the third roll stand 16 located in the downstream position are set horizontally, and the axes of the rolls 15 disposed in the second roll stand 14 located between the first and second roll stands 12 and 16 are set perpendicularly, as shown in Fig. 7.
  • the rolls 13, 15, 17 in these three roll stands 12, 14, 16 constituting the rolling unit 10 are designed to be driven by one drive motor 18 via a speed reducer 19.
  • the axis-to-axis distance P between the rolls 13 of the first roll stand 12 and rolls 15 of the second roll stand 14 is set to be not more than 1.2 times the diameter R of the roll 13 (15, 17).
  • the product 20 can be guided accurately and fed to the roll pass of the roll stand 14 by thus shortening the axis-to-axis distance P between the adjacent rolls 13 and the rolls 15, without employing any guide means for guiding the product 20 between these two roll stands 12, 14. If a mechanism to be described later is employed for adjusting the parting between the opposing roll pairs 13, 15 or 17 in the roll stands 12, 14 or 16, the axis-to-axis distance P between the rolls 13 and the rolls 15 still can be kept within the above noted range of not more than 1.2 times the roll diameter R.
  • Fig. 1 shows in horizontal cross-sectional view a first roll stand 12 and a second roll stand 14 in the rolling unit 10. Since the structure of the first roll stand 12, that of the second roll stand 14 and that of the third roll stand 16 are substantially the same except that they are arranged side by side in such a way that the rotational axes of the rolls 15 may be offset by 90° from those of the other rolls 13, 17, only the structure of the first roll stand 12 will be described, and a detailed description of the second and third roll stands 14, 16 will be omitted.
  • the components of the second roll stand 14 and the third roll stand 16 corresponding to the components of the first roll stand 12 are identified by the same reference numbers, respectively.
  • a pair of openings 24a are defined in each housing 24.
  • the housings are disposed on a bed plate 22 of the rolling unit 10 as shown in Fig. 2.
  • the openings 24a are positioned closer to the downstream end of the housing 24 above and below the pass line PL, along which the product 20 is fed.
  • the openings 24a are perpendicular to the pass line PL, as shown in Fig. 4.
  • a pair of eccentric members 26 are rotatably supported in the openings 24a respectively, and an eccentric opening 26a is defined in each eccentric member 26 such that the axis of the eccentric opening 26a is offset from that of the corresponding opening 24a.
  • a pair of roll shafts 28 extend through and are rotatably supported in these eccentric openings 26a via bearings 30.
  • each roll shaft 28 is set such that the axis C 1 thereof is laterally offset from the axis C 2 of the corresponding eccentric member 26, when the roll shaft 28 is inserted through the eccentric opening 26a of the eccentric member 26 and that the axis C 1 of the roll shaft 28 may be shifted by rotating the eccentric member 26 in clockwise or counterclockwise direction by a mechanism to be described later.
  • a pair of adjusting shafts 32 intersecting with the roll shafts 28 are rotatably supported in upstream portions of the housing 24 so as to intersect the eccentric members 26.
  • Worms 24 are fitted on each adjusting shaft 32 to be rotatable integrally therewith at the positions intersecting the respective eccentric members 26.
  • Each worm 34 is designed to engage with a toothed portion 26b formed on the circumference of the corresponding eccentric member 26.
  • the two worms 34 disposed on each adjusting shaft 32 are of opposite hand; whereas the two worms 34 engaging the eccentric members 26 which are fitted on the same roll shaft 28 are of the same hand.
  • a gear 36 is fitted on one end portion of each adjusting shaft 32 to be rotatable integrally therewith.
  • the gears 36 fitted to the respective adjusting shafts 32 are rotated in the same direction by rotating the adjusting gear 38 in the clockwise or counterclockwise direction by a suitable drive means such as a motor, whereby the corresponding eccentric members 26 are rotated via the respective worms 34.
  • a suitable drive means such as a motor
  • the axis-to-axis distance between the roll shafts 28 supported by the pair of eccentric members 26 is varied (see Figs. 9, 11) to adjust the parting between the opposing rolls 13 (see Figs. 8, 10).
  • the downstream wall of the housing 24 (the side toward which the roll shafts 28 are biased) is designed to be extremely thin, as shown in Fig. 4.
  • the roll shafts 28 are disposed in the housing 24 so as to be biased upstream, as shown in Fig. 1, whereby the upstream wall of the housing 24 is designed to be extremely thin.
  • the first roll stand 12 and the second roll stand 14 are arranged adjacent to each other such that the thin wall sides of their respective housings 24 face each other, whereby the axis-to-axis distance P between the rolls 13 of the first roll stand 12 and the rolls 15 of the second roll stand 14 can be reduced to not more than 1.2 times the diameter R of the rolls 13 (15).
  • the second roll stand 14 and the third roll stand 16 are arranged in such a way that the side of the housing 24 in the second roll stand 14 where the roll parting adjustment mechanism is disposed may oppose to the third roll stand 16, so that the axis-to-axis distance between the rolls 15 and the rolls 17 is greater than 1.2 times the diameter R of the roll 13 but not more than 2R.
  • a product 20 having underwent a rolling process in the upstream line of the installation shown in Fig. 12 is fed to the first roll stand 12 of the rolling unit 10, shown in Fig. 2 and passed through the roll pass defined between the opposing rolls 13 of the first roll stand 12 to undergo a predetermined reduction.
  • the thus reduced product 20 is then fed through the roll pass defined by the rolls 15 of the second roll stand 14. Since the first roll stand 12 and the second roll stand 14 are arranged such that the axis-to-axis distance P between the rolls 13 and the rolls 15 is not more than 1.2 times the diameter of the roll 13, the product 20 can accurately be directed to the roll pass of the second roll stand 14 without providing any interstand guiding means as conventionally employed.
  • the roll 13 in the first roll stand 12 also serve as the guiding means for guiding the product 20 to the second roll stand 14, so that twisting of the product 20 can effectively be prevented.
  • a very light reduction commonly referred to as a "skin pass” is designed to be effected in the final roll pass in the finish rolling, twisting of the product 20 can be held within a tolerable range, even if the axis-to-axis distance between the rolls 15 in the second roll pass 14 and the rolls 17 in the third roll pass 16 is greater than 1.2 times but not greater than 2 times the roll diameter.
  • the clearance between the opposing rolls 13 in the first roll pass 12 is set to a predetermined parting, as shown in Fig. 8, and the rolls 13 are rotated in the directions opposite to each other, where the axes C 1 of the roll shafts 28 and the axes C 2 of the eccentric members 26 are in the relationship as shown in Fig. 9. Accordingly, if the product 20 is fed between the rolls 13 of the first roll stand 12, the product 20 undergoes a predetermined reduction and is then fed to the second roll stand 14.
  • the adjusting gear 38 is rotated in the predetermined direction by a drive means to rotate the adjusting shafts 38 in the same direction. Since the worms 34 disposed on each adjusting shaft 32 are engaged with the toothed portions 26b of the corresponding eccentric members 26 fitted on the upper or lower roll shafts 28, the eccentric members 26 can be rotated in the predetermined direction in the openings 24a defined through the housing 24 as the corresponding adjusting shaft 32 rotates. The upper eccentric member 26 and the lower eccentric member 26 rotate in opposite directions to change the distance between the axes C 1 of the roll shafts 28 supported by the eccentric members 26, as shown in Fig. 11.
  • the rolling unit consists of three roll stands.
  • the rolling unit may of course consist of only two roll stands.
  • the roll stands in the rolling unit may respectively be driven by independent drive motors.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Optical Communication System (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
EP95300774A 1995-02-03 1995-02-08 Walzeinheit Expired - Lifetime EP0726100B1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
ZA95883A ZA95883B (en) 1995-02-03 1995-02-03 Rolling unit
ES95300774T ES2138704T3 (es) 1995-02-03 1995-02-08 Unidad de laminado.
DE69513137T DE69513137T2 (de) 1995-02-03 1995-02-08 Walzeinheit
EP95300774A EP0726100B1 (de) 1995-02-03 1995-02-08 Walzeinheit
AT95300774T ATE186244T1 (de) 1995-02-03 1995-02-08 Walzeinheit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA95883A ZA95883B (en) 1995-02-03 1995-02-03 Rolling unit
EP95300774A EP0726100B1 (de) 1995-02-03 1995-02-08 Walzeinheit

Publications (2)

Publication Number Publication Date
EP0726100A1 true EP0726100A1 (de) 1996-08-14
EP0726100B1 EP0726100B1 (de) 1999-11-03

Family

ID=26140023

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95300774A Expired - Lifetime EP0726100B1 (de) 1995-02-03 1995-02-08 Walzeinheit

Country Status (5)

Country Link
EP (1) EP0726100B1 (de)
AT (1) ATE186244T1 (de)
DE (1) DE69513137T2 (de)
ES (1) ES2138704T3 (de)
ZA (1) ZA95883B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105363804A (zh) * 2015-12-19 2016-03-02 重庆麦拓科技有限公司 一种轧机用导卫装置的辊缝调整机构

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55103204A (en) 1979-01-31 1980-08-07 Nippon Steel Corp Continuous rolling apparatus
JPS61150703A (ja) 1984-12-24 1986-07-09 Keiichiro Yoshida ロ−ラ−ダイスによる金属材料の加工方法および装置
JPS6268609A (ja) * 1985-09-24 1987-03-28 Tokyo Tekko Kk 条鋼のリフオ−ミング装置
EP0340505A2 (de) 1988-05-05 1989-11-08 Sms Schloemann-Siemag Aktiengesellschaft Arbeitsverfahren und Walzenstrasse zum kontinuerlichen Walzen eines profilierten Walzgutstranges auf einen vorgegebenen, massgenauen (Fertig-) Profilquerschnitt

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55103204A (en) 1979-01-31 1980-08-07 Nippon Steel Corp Continuous rolling apparatus
JPS61150703A (ja) 1984-12-24 1986-07-09 Keiichiro Yoshida ロ−ラ−ダイスによる金属材料の加工方法および装置
JPS6268609A (ja) * 1985-09-24 1987-03-28 Tokyo Tekko Kk 条鋼のリフオ−ミング装置
EP0340505A2 (de) 1988-05-05 1989-11-08 Sms Schloemann-Siemag Aktiengesellschaft Arbeitsverfahren und Walzenstrasse zum kontinuerlichen Walzen eines profilierten Walzgutstranges auf einen vorgegebenen, massgenauen (Fertig-) Profilquerschnitt

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
H. BRAUER ET AL.:: "Developments - Rolling mill blocks in modern Kocks mills", IRON AND STEEL ENGINEER, vol. 55, no. 1, January 1978 (1978-01-01), PITTSBURGH US, pages 55 - 67, XP002366042 *
PATENT ABSTRACTS OF JAPAN vol. 10, no. 353 (M - 539) 28 November 1986 (1986-11-28) *
PATENT ABSTRACTS OF JAPAN vol. 11, no. 266 (M - 620) 28 August 1987 (1987-08-28) *
PATENT ABSTRACTS OF JAPAN vol. 4, no. 150 (M - 037) 22 October 1980 (1980-10-22) *
W. KRÄMER ET AL.:: "Hochpräzisionswalzen von Stabstahl auf der Feinstahl- und Drahtstrasse der von Moos Stahl AG (Luzern/Schweiz)", STAHL UND EISEN., vol. 110, no. 6, 14 June 1990 (1990-06-14), DÜSSELDORF DE, pages 59 - 64, XP000140620 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105363804A (zh) * 2015-12-19 2016-03-02 重庆麦拓科技有限公司 一种轧机用导卫装置的辊缝调整机构

Also Published As

Publication number Publication date
ZA95883B (en) 1995-10-13
DE69513137T2 (de) 2000-08-17
EP0726100B1 (de) 1999-11-03
DE69513137D1 (de) 1999-12-09
ES2138704T3 (es) 2000-01-16
ATE186244T1 (de) 1999-11-15

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