EP0439666A1 - Vorrichtung zum Walzen und Längsteilen ohne Verwindung und Verfahren zur Herstellung von Bewehrungsstäben - Google Patents

Vorrichtung zum Walzen und Längsteilen ohne Verwindung und Verfahren zur Herstellung von Bewehrungsstäben Download PDF

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Publication number
EP0439666A1
EP0439666A1 EP90108378A EP90108378A EP0439666A1 EP 0439666 A1 EP0439666 A1 EP 0439666A1 EP 90108378 A EP90108378 A EP 90108378A EP 90108378 A EP90108378 A EP 90108378A EP 0439666 A1 EP0439666 A1 EP 0439666A1
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EP
European Patent Office
Prior art keywords
rolls
rolling
sides
vertical plane
aligned
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
EP90108378A
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English (en)
French (fr)
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EP0439666B1 (de
Inventor
David Teng Pong
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Individual
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Individual
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Publication date
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Priority to AT90108378T priority Critical patent/ATE97034T1/de
Priority to MYPI91000145A priority patent/MY105430A/en
Priority to JP3032463A priority patent/JPH0815613B2/ja
Priority to BR919100426A priority patent/BR9100426A/pt
Priority to CA002035502A priority patent/CA2035502C/en
Priority to CN91100666.4A priority patent/CN1037943C/zh
Publication of EP0439666A1 publication Critical patent/EP0439666A1/de
Application granted granted Critical
Publication of EP0439666B1 publication Critical patent/EP0439666B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • 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
    • B21B1/08—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 structural sections, i.e. work of special cross-section, e.g. angle steel
    • B21B1/0815—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 structural sections, i.e. work of special cross-section, e.g. angle steel from flat-rolled products, e.g. by longitudinal shearing

Definitions

  • This invention pertains to the field of manufacturing steel reinforcing bar.
  • twist-method In a conventional rolling mill layout, all of the stands are arranged on the same axis, and the steel rod are twisted approximately 90° by either twist guides or twist rollers as they enter the next stand. This is termed the "twist-method."
  • Use of this method for production of steel rod has often been troublesome, because an incorrect setting of the twist angle, or wear in the twist rollers can prevent the steel rod from entering the next stand in a proper alignment, or at all.
  • Use of the twist-method to produce steel rod is also problematic in that there is a greater possibility of surface defects resulting from contacts of the steel bar with the twist guides or twist rollers.
  • Figure 1 illustrates the typical horizontal stand slit-rolling mill, without showing rod twisting guides or twisting rollers, the base, or the turning means for the rollers. Twisting of the steel rod remains necessary between all stands including between the final two stands 17 and 18. The twisting of each rod emerging from stand 17 is critical because if problems occur on one of the stands, the production on the other stand is interrupted as well, thereby causing a bottleneck in production.
  • FIG. 2 A typical horizontal and vertical slit-rolling mill, without showing rod twisting guides or twisting rolls, or the base, or the turning means for the rolls, is illustrated in Figure 2. Although the majority of the twisting is eliminated, twisting of the steel rod remains necessary between stands 14 and 15 and from stand 15 to 16. Furthermore, the overlapping of the slitted oval section from stand 17 to 18 involves bending the steel rod at its longer axis on its cross section, which results in the full advantage of the horizontal and vertical arrangement not being realized.
  • the present invention provides an improved apparatus and method for producing steel reinforcing bar which eliminates the shortcomings found in the prior art methods of producing steel reinforcing bar, and the method is called "the NTA method," ("NTA" stands for no-twist approach).
  • Figures 3 and 4 illustrate two embodiments of the apparatus employing the NTA method without showing the base, the housings for the stands or the means to turn the rolls comprising the stands, which are standard design, and which are deleted for clarity of presentation.
  • a first feature of both embodiments of the apparatus is the arrangement of the sides of the rolls of stands 13 and 14 at 45° to a vertical plane through A-A and at approximately 90° to each other, resulting in the steel stock being presented at stand 15 without twisting being required.
  • a second feature of the first embodiment of the apparatus is its arrangement of the sides of the rolls of stand 17 being vertical and the stand 18 being horizontal to the vertical plane through A-A and at approximately 90° to each other, which accomplishes the goal of rolling the steel rod without the need for twisting.
  • a second feature of the second embodiment of the apparatus is its arrangement of the sides of the rolls of stands 17' and 18' at approximately 45° in opposite directions to the vertical plane through A-1 and at approximately 90° to each other, which accomplishes the goal of rolling the steel without the need for twisting.
  • FIG. 1 is a diagram of a conventional slit-rolling mill incorporating horizontal stands.
  • FIG. 2 is a diagram of a conventional slit-rolling mill incorporating vertical and horizontal stands.
  • FIGS. 3 and 4 are schematic side views of the two embodiments of the apparatus without showing the base, the housing for the stands, or the means to rotate the roll comprising the stands, with the deleted components being of standard design.
  • the two embodiments are similar except for the orientations of stands 17 and 17' and 18 and 18'.
  • FIGS. 5-13 illustrate the stand and steel rod at various stages of rolling common to both embodiments shown in FIGS. 3 and 4.
  • FIG. 5 is a cross sectional view of the steel rod prior to entering stand 13 viewed through plane A-A.
  • FIG. 6 is a view of stand 13, viewed through plane A-A.
  • FIG. 7 is a cross-sectional view of the steel rod after rolling by stand 13 and aligned to enter stand 14, viewed through plane A-A.
  • FIG. 8 is a perspective drawing of stand 14, viewed through plane A-A.
  • FIG. 9 is a cross section of stock after being rolled by stand 14, viewed through plane A-A.
  • FIG. 10 is a diagram of stand 15, viewed through plane A-A.
  • FIG. 11 is a cross sectional view of the steel stock after being rolled by stand 15 and aligned to enter stand 16, viewed through A-A.
  • FIG. 12 is a drawing of stand 16, viewed through plane A-A.
  • FIG. 13 is a cross-sectional view of one of the steel rods after being rolled and slit by stand 16 and before entering stands 17, viewed through plane A-A.
  • FIGS. 14-17 illustrate the additional stands and cross-section of steel rods at various stages of rolling unique to the first embodiment as shown in FIG. 3.
  • FIG. 14 is a drawing of stands 17, viewed through plane A-A.
  • FIG. 15 is a cross-sectional view of the steel rods after being rolled by stand 17 and aligned to enter stand 18, viewed through plane A-A.
  • FIG. 16 is a drawing of stand 18, viewed through plane A-A.
  • FIG. 17 is a cross-sectional view of the finished steel reinforcing bar, viewed through plane A-A.
  • FIGS. 18-21 illustrate the additional stands and cross-section of steel rods at various stages of rolling unique to the second embodiment as shown in FIG. 4.
  • FIG. 18 is a drawing of stands 17', viewed through plane A-A.
  • FIG. 19 is a cross-sectional view of the steel rods after being rolled by stand 17' and aligned to enter stand 18', viewed through plane A-A.
  • FIG. 20 is a drawing of stand 18', viewed through plane A-A.
  • FIG. 21 is a cross-sectional view of the finished steel reinforcing bar, viewed through plane A-A.
  • FIGs. 3 and 4 perspective schematic views of the first and second embodiments of the apparatus embodying the present invention.
  • the base of the apparatus, the housing for the stands, and the driving means for turning the rolls comprising the stands are not shown.
  • the apparatus allows the steel rod to be rolled and shaped without requiring the steel rod to be twisted.
  • the stands are arranged with their sides in various orientations to the vertical plane through A-A.
  • the first embodiment of the invention allows steel reinforcing rod to be manufactured as follows:
  • the starting steel stock, shown in Fig. 5, is rolled by a first stand 13, with rolling surfaces 231 defining an oval, which is oriented with the sides 233 of the rolls 23 offset approximately 45° in one direction from the vertical plane A-A.
  • First stand 13 is shown in greater detail by Fig. 6.
  • the resulting rod, which has an oval shaped cross-section, illustrated in Fig. 7, is next rolled by a second stand 14, shown in greater detail in Fig. 8, which stand has rolling surfaces 241 defining a square and which is oriented with the sides 243 of the rolls 24 offset approximately 45° in a second direction from the vertical plane A-A.
  • the oval shaped steel rod does not require twisting to enter the second stand 14 as the longer dimension of its oval cross-section as rolled is already oriented diagonally with the square rolling surfaces of the second stand 14.
  • the resulting steel rod having a generally square cross-section, illustrated in Fig. 9, is next rolled by stand 15, having rolling surfaces 251 defining two slightly overlapping circles, which is oriented with the sides 253 of its rolls 25 offset approximately 0° from the vertical plane A-A, as can be best seen in Fig. 10.
  • the steel rod which emerges from stand 15 has a cross-section of two slightly overlapping circles, depicted in Fig. 11.
  • the steel rod is rolled by a stand 16 having the same spatial orientation as the preceding stand, but with a rolling surface 261 defining two abutting circles, as is best shown in Fig. 12.
  • the rolling by stand 16 splits the rod into two generally circular rods, one of which is shown in Fig. 13.
  • the two rods are next presented to be rolled one each by two separate lines of stands 17-18, with the first stand 17 in each line of stands being aligned with the sides 273 of its rolls 27 offset approximately 90° from the vertical plane A-A, and with rolling surfaces 271 generally defining a circle, as shown in Fig. 14.
  • the steel rods resulting from rolling by stands 17 have a generally circular cross-section, shown in Fig. 15.
  • the two steel rods are rolled one each by stands 18 defining a generally circular rolling surface 281 and aligned with the sides 283 of their rolls 28 offset approximately 0° from a vertical plane, as can be seen in Fig. 16.
  • the offsetting of the orientations of the two stands allow the steel rods to be rolled uniformly on all sides without twisting of the steel rod being required.
  • the final product is two steel rods with circular cross-sections, one of which is shown in Fig. 17.
  • the second embodiment shown in Fig. 4, is similar to the first embodiment, except for the orientation of the stands in the lateral lines of stands located at the end of the apparatus where the rolling of the steel rod is finished.
  • the description of the first stages, recited above with reference to Figs. 3-13 remains the same.
  • the two rods are rolled after stand 16 by two separate lines of stands with the first stand 17' in each line of stands being aligned with the sides 273' of their rolls 27' offset approximately 45° in one direction from the vertical plane A-A, and with the rolling surfaces 271' defining an oval, best shown in Fig. 18.
  • the steel rods resulting from rolling by stands 17' have an oval cross-section, as shown in Fig. 19.
  • the steel rods are rolled by stands 18' having a circular cross-section and aligned with the sides 283' of their rolls 28' offset approximately 45° in a second direction, opposite the first direction, from the vertical plane A-A.
  • the offsetting of the two stands by 45° from the vertical plane and at 90° to each other allows the steel rods to be rolled uniformly on all sides without twisting being necessary.
  • the final product is two steel rods with circular cross-sections, one of which is shown in Fig. 21.
  • Figs. 5 through 13 are common to both embodiments of the apparatus, and are views through plane A-A, showing the orientation of the stands and the cross-sections of the steel rod after being rolled by each stand.
  • Fig. 5 is a cross-sectional diagram of the steel stock prior to being rolled by stand 13.
  • Fig. 6 provides a detailed view of stand 13, without showing its housing, viewed through plane A-A.
  • Stand 13 comprises two adjacent rolls 23 with concave semi-oval shaped rolling profile, each roller turning in opposite directions along their parallel shafts 232, and with the sides of the rolls 233 offset approximately 45° in one direction from the plane through A-A.
  • Fig. 7 is a cross-sectional view of the oval shaped steel rod after rolling in stand 13 with its longer dimension offset at approximately 45° from the plane through A-A.
  • Fig. 8 illustrates stand 14, without showing its housing, viewed through plane A-A.
  • Stand 14 comprises two adjacent rolls 24 with triangular shaped roll profiles, each roller turning in opposite directions along their parallel shafts 242 and with the sides of the rolls 243 offset approximately 45° in an opposite direction from the plane through A-A as the rolls in stand 13.
  • the sides of the roll 23 and 24 comprising stands 13 and 14 are thus offset approximately 90° from each other.
  • Fig. 9 is a diagram of the square steel rod after being rolled by stand 14, viewed through A-A.
  • Fig. 10 is a view of stand 15, without showing its housing viewed through A-A.
  • Stand 15 comprises two adjacent rolls 25 with roll profiles 251 in the shape of two slightly overlapping semi-circles, each roll turning in opposite directions along their parallel shafts 252, with the sides of the roll 253 parallel to the plane through A-A.
  • Fig. 11 is a cross-sectional view of the steel rod as it emerges from stand 15, viewed through plane A-A.
  • Fig. 12 is a view of stand 16, without showing its housing, viewed along plane A-A.
  • Stand 16 comprises two adjacent rolls 26, with roll profiles 261 in the shape of two adjacent semi-circles, each roller turning in opposite directions along their parallel shafts, 262, with their sides 263 parallel to the plane through A-A.
  • Stand 16 slits the entering steel rod shown in Fig. 11 into two steel rods.
  • Fig. 13 is a cross-sectional view of the steel rod as it emerges from stand 16, viewed through plane A-A.
  • Figs. 14-17 are unique to the first embodiment.
  • Fig. 14 is a view of stands 17, without showing their housing, viewed through plane A-A.
  • Stands 17 comprise two adjacent rolls 27, with roll profiles 271 in the shape of a concave semi-circle, each roll turning in opposite direction along their parallel shafts 272, with the sides of the rolls 273 offset approximately 0° from the plane through A-A.
  • Fig. 15 is a cross-sectional view of the steel rods as they emerge from stands 17.
  • Fig. 16 is a view of stands 18 without showing their housings, viewed through plane A-A.
  • Stands 18 comprise two adjacent rolls 28, containing roll profiles 281 in the shape of a concave semi-circle, each roll turning in opposite direction along their parallel shafts 282, with the sides of the rolls 283 offset approximately 90° from the plane through A-A as the rolls in stands 17.
  • Fig. 17 is a cross-sectional view of finished reinforcing rod as they emerge from stands 18.
  • the second embodiment of apparatus is substantially similar to the first embodiment, except with respect to the orientation of its stands 17' and 18', and these features are illustrated in Figs. 18-21.
  • Fig. 18 is a view of stands 17', without showing their housing, viewed through plane A-A.
  • Stands 17' comprise two adjacent rolls 27', with roll profiles 271' in the shape of a concave semi-oval, each roll turning in opposite direction along their parallel shafts 272', with the sides of the rolls 273' offset in one direction by approximately 45° from the plane through A-A.
  • Fig. 19 is a cross-sectional view of the steel rods as they emerge from stands 17'.
  • Fig. 20 is a view of stands 18' without showing their housings, viewed through plane A-A.
  • Stands 18' comprise two adjacent rolls 28, containing roll profiles 281 in the shape of a concave semi-oval, each roll turning in opposite direction along their parallel shafts 282', with the sides of the rolls 283' offset approximately 45° in an opposite direction from the plane through A-A as the rolls in stands 17'.
  • Fig. 21 is a cross-sectional view of the finished reinforcing rod as they emerge from stands 18'.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Wire Processing (AREA)
EP90108378A 1990-02-02 1990-05-03 Vorrichtung zum Walzen und Längsteilen ohne Verwindung und Verfahren zur Herstellung von Bewehrungsstäben Expired - Lifetime EP0439666B1 (de)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AT90108378T ATE97034T1 (de) 1990-02-02 1990-05-03 Vorrichtung zum walzen und laengsteilen ohne verwindung und verfahren zur herstellung von bewehrungsstaeben.
MYPI91000145A MY105430A (en) 1990-02-02 1991-01-30 No-twist slit-rolling approach ( "nta" ) apparatus and method for manufacturing steel reinforcing rod
JP3032463A JPH0815613B2 (ja) 1990-02-02 1991-02-01 圧延ロール進入装置及び鋼製補強バーの製造方法
BR919100426A BR9100426A (pt) 1990-02-02 1991-02-01 Aparelho e processo com tecnica de laminacao por fendimento e sem torcao para fabricacao de haste de reforco de aco
CA002035502A CA2035502C (en) 1990-02-02 1991-02-01 No-twist slit-rolling approach ("nta") apparatus and method for manufacturing steel reinforcing rod
CN91100666.4A CN1037943C (zh) 1990-02-02 1991-02-02 制造钢筋用的无扭式切开－轧制的装置和方法

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US47428590A 1990-02-02 1990-02-02
US474285 1990-02-02
SG67994A SG67994G (en) 1990-02-02 1994-05-20 No-twist slit-rolling approach ("NTA") apparatus and method for manufacturing steel reinforcing rod

Publications (2)

Publication Number Publication Date
EP0439666A1 true EP0439666A1 (de) 1991-08-07
EP0439666B1 EP0439666B1 (de) 1993-11-10

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EP90108378A Expired - Lifetime EP0439666B1 (de) 1990-02-02 1990-05-03 Vorrichtung zum Walzen und Längsteilen ohne Verwindung und Verfahren zur Herstellung von Bewehrungsstäben

Country Status (5)

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EP (1) EP0439666B1 (de)
DE (1) DE69004558T2 (de)
ES (1) ES2047745T3 (de)
HK (1) HK63194A (de)
SG (1) SG67994G (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0634231A1 (de) * 1993-07-13 1995-01-18 DANIELI & C. OFFICINE MECCANICHE S.p.A. System zum Walzen von mindestens zwei Profilen in Blöcken von Hochgeschwindigkeitswalzgerüsten
CN102179403A (zh) * 2011-03-23 2011-09-14 中冶赛迪工程技术股份有限公司 高强度细晶粒热轧带肋钢筋生产设备及其生产工艺
CN102626712A (zh) * 2012-05-08 2012-08-08 山西太钢不锈钢股份有限公司 不锈螺纹钢的轧制设备及方法
CN111330973A (zh) * 2020-04-07 2020-06-26 首钢水城钢铁（集团）有限责任公司 一种右旋锚杆钢筋两线切分轧制工艺
CN113828634A (zh) * 2021-09-10 2021-12-24 首钢水城钢铁（集团）有限责任公司 一种18mm、20mm轧带肋钢筋2线切分通用孔型生产方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112692054B (zh) * 2020-11-18 2022-03-04 江苏省镔鑫钢铁集团有限公司 一种能够降低原料成本的棒材轧钢切分工艺

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1809260A1 (de) * 1967-11-15 1969-07-24 British Iron Steel Research Walzwerk
DE2446905A1 (de) * 1974-10-01 1976-04-08 Moeller & Neumann Gmbh Drahtwalzwerk in blockform, sog. drahtblock
DE3602522A1 (de) * 1986-01-24 1987-07-30 Mannesmann Ag Verfahren zur wirtschaftlichen erzeugung von draht- und rundstahl

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1809260A1 (de) * 1967-11-15 1969-07-24 British Iron Steel Research Walzwerk
DE2446905A1 (de) * 1974-10-01 1976-04-08 Moeller & Neumann Gmbh Drahtwalzwerk in blockform, sog. drahtblock
DE3602522A1 (de) * 1986-01-24 1987-07-30 Mannesmann Ag Verfahren zur wirtschaftlichen erzeugung von draht- und rundstahl

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0634231A1 (de) * 1993-07-13 1995-01-18 DANIELI & C. OFFICINE MECCANICHE S.p.A. System zum Walzen von mindestens zwei Profilen in Blöcken von Hochgeschwindigkeitswalzgerüsten
US5544516A (en) * 1993-07-13 1996-08-13 Danieli & C. Officine Meccaniche Spa System to roll at least two sections in blocks of fast rolling mill stands
CN102179403A (zh) * 2011-03-23 2011-09-14 中冶赛迪工程技术股份有限公司 高强度细晶粒热轧带肋钢筋生产设备及其生产工艺
CN102179403B (zh) * 2011-03-23 2012-12-05 中冶赛迪工程技术股份有限公司 高强度细晶粒热轧带肋钢筋生产设备及其生产工艺
CN102626712A (zh) * 2012-05-08 2012-08-08 山西太钢不锈钢股份有限公司 不锈螺纹钢的轧制设备及方法
CN111330973A (zh) * 2020-04-07 2020-06-26 首钢水城钢铁（集团）有限责任公司 一种右旋锚杆钢筋两线切分轧制工艺
CN113828634A (zh) * 2021-09-10 2021-12-24 首钢水城钢铁（集团）有限责任公司 一种18mm、20mm轧带肋钢筋2线切分通用孔型生产方法
CN113828634B (zh) * 2021-09-10 2024-04-12 首钢水城钢铁（集团）有限责任公司 一种18mm、20mm轧带肋钢筋2线切分通用孔型生产方法

Also Published As

Publication number Publication date
EP0439666B1 (de) 1993-11-10
DE69004558D1 (de) 1993-12-16
HK63194A (en) 1994-07-01
DE69004558T2 (de) 1994-05-19
SG67994G (en) 1995-03-17
ES2047745T3 (es) 1994-03-01

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