EP0612274A1 - Procede et appareil permettant de former simultanement quatre ronds en metal - Google Patents

Procede et appareil permettant de former simultanement quatre ronds en metal

Info

Publication number
EP0612274A1
EP0612274A1 EP92924269A EP92924269A EP0612274A1 EP 0612274 A1 EP0612274 A1 EP 0612274A1 EP 92924269 A EP92924269 A EP 92924269A EP 92924269 A EP92924269 A EP 92924269A EP 0612274 A1 EP0612274 A1 EP 0612274A1
Authority
EP
European Patent Office
Prior art keywords
bar
rollers
pair
roller
slitter
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.)
Withdrawn
Application number
EP92924269A
Other languages
German (de)
English (en)
Other versions
EP0612274A4 (fr
Inventor
Giichi Matsuo
Akira Sakai
Dayton W. Elley
Jimmy Jeral Rains
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.)
Structural Metals Inc
Original Assignee
Structural Metals 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 Structural Metals Inc filed Critical Structural Metals Inc
Publication of EP0612274A1 publication Critical patent/EP0612274A1/fr
Publication of EP0612274A4 publication Critical patent/EP0612274A4/fr
Withdrawn legal-status Critical Current

Links

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
    • B21B1/08—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 relates to the forming of small 5 diameter metal rounds, such as reinforcing bar rounds. More specifically, this invention relates to methods and apparatus for simultaneously forming by rolling four rounds of uniform size.
  • the additional problems involved in producing four rounds simultaneously from one bar are significant.
  • the problems include maintaining the uniformity of the cross sectional areas of the strands as well as avoiding the cobbling of the strands during the slitting process.
  • Other considerations include the resistance produced when separating the strands, which resistance can result in excessive heat, lower separating speeds and lower efficiency.
  • the apparatus includes a irst pair and a second pair of forming rollers. These forming rollers are connected in series to sequentially pass a bar. Each pair has an adjustable separation distance. Grooves are formed in the surfaces of the first and second roller pairs. The grooves are dimensioned in combination such that the bar, at the completion of the second pass, is formed into four portions of substantially equal areas.
  • the apparatus includes a pair of pre- ⁇ litter rollers connected downstream from the forming roller pairs. The pre-slitter rollers have an adjustable separation distance. At least one of the pair of pre- slitter rollers has two central grooves that define a free space. This pre-slitter roller also has three serial ridges.
  • the grooves and the ridges of the pre- slitter roller, or rollers are dimensioned in combination with the grooves of the first and second forming roller pairs.
  • the dimensioning in combination functions to form a bar comprised of four serial strands of substantially equal cross sectional area separated by thin connecting portions.
  • each roller of the first roller pair has a groove oriented with respect to the entering bar such that each groove forms an end portion of the bar.
  • the separation distance between the surfaces of the first roller pair determine the width of the bar.
  • the width of the groove in each roller of the first pair determines the cross-sectional height of an end portion of the bar.
  • rollers of the second pair are oriented with respect to the entering bar such that the separation distance between the roller surfaces determines the height of the central portion of the bar.
  • the rollers of the second pair have ridges for forming the bar into four portions separated by thick connecting portions.
  • the ridges of the pre- slitter roller have outside and inside slope angles of approximately 30°.
  • the invention discloses further apparatus for use in simultaneously forming metal rounds from a bar guided to the apparatus, the bar being comprised of four serial strands, two outside and two middle, separated by thin connecting portions.
  • the further apparatus comprises a first pair of slitter rollers, each roller having a first and second ridge located to correspond with a thin portion connecting an outside strand to a middle strand.
  • the ridges have an outside slope angle greater than the inside slope angle of the corresponding portion of the outside strand.
  • the apparatus also includes means serially connected downstream of the first pair of slitter rollers for separating the two middle strands.
  • the outside slope angles of the ridges of the first slitter rollers exceed the inside slope angles of the corresponding portions of the outside strands by approximately 22°. Further, it has been found effective if the outside slope angle of the ridges of the first slitter rollers are approximately 52°.
  • the apparatus may further include inside slope angles for each ridge of the first slitter rollers that are less than the outside slope angle of the corresponding middle strand. It has been found effective if the inside slope angles of the first slitter rollers are approximately 25°.
  • the means for separating the two middle strands is comprised of a slitter roller pair wherein at least one roller has a ridge located to correspond to the thin connecting portion between the two metal strands.
  • the slope angles of the second slitter roller ridge are greater than the corresponding inside slope angles of the middle strands. It has been found effective if the inside slope angles of the ridge exceed the corresponding inside slope angles of the middle strands by approximately 5 ⁇ . Thirty-five degrees (35 ⁇ ) has been found to be an effective slope angle for the ridge of the second slitter roller.
  • the invention discloses a method for forming a bar to be slit and simultaneously formed into four metal rounds that comprises adjusting the separation distance between a first pair of forming rollers and between a second pair of forming rollers.
  • the method includes passing a bar by the first of rollers to form a bar of fixed cross-sectional width and fixed cross-sectional height over end portions of the bar, and passing the bar by the second pair of rollers to form a bar of fixed cross-sectional height over central portions of the bar.
  • the method includes, subsequent to the above steps, passing the bar by a pair of pre-slitter rollers.
  • the pre-slitter rollers have three ridges for forming four serial strands of approximately equal cross-sectional area separated by thin connected portions.
  • the invention also discloses a method of slitting a bar comprised of four serial strands, two outside and two middle, of approximately equal cross-sectional area separated by thin connecting portions.
  • the method comprises passing the bar by a first pair of slitter rollers, each having two ridges with interfering outside slope angles and noninterfering inside slope angles. Such passing of the bar serves to separate each outside strand from the two middle strands by applying a lateral force with portions of the outside of the ridge to portions of the inside surface of an outside strand. At the same time, significant lateral force is not applied with the inside surface of a ridge to the outside surface of a middle strand.
  • the method includes subsequently separating the two metal strands.
  • Fig. 1 comprises a schematic plan view of a series of connected forming and slitting rollers of the preferred embodiment.
  • Fig. 1A comprises a schematic elevational view of a roller stand.
  • Figs. 2A through 2G illustrate the bar subsequent to the forming passes, the slitting passes and further forming passes.
  • Fig. 3A is an elevational view of one of a pair of forming rollers.
  • Fig. 3B is an elevational view of one of a pair of forming rollers.
  • Fig. 4 is an elevational view of one of a pair of pre-slitter rollers.
  • Fig. 5 is an elevational view of a slitter roller.
  • Fig. 5A is an illustrative view of the interaction of a bar of formed into strands with a slitter roller.
  • Fig. 5B is an illustrative closeup of a detail of the interaction of the ridge of a slitter roller with the sides of the strands of a bar.
  • Fig. 6 is a view of a single ridge slitter roller.
  • Fig. 6A is a view of a bar separated into four strands connected by thin connecting portions.
  • a conventional roller stand S is schematically shown in Fig. 1A.
  • An elevational view of a roller pair that would be utilized toward the end of the process of simultaneously forming four metal rounds is illustrated.
  • two cylindrical rollers 154 are mounted within frame 99.
  • the longitudinal axes of the rollers are shown horizontal to the floor.
  • the two rollers are further illustrated as being placed vertically parallel to each other, one on top of the other. This presumption of a horizontal and vertical alignment of the rollers has been adopted herein for convenience.
  • the roller stand could be rotated such that the aforementioned vertical and horizontal directions could assume other directions.
  • rollers 154 of Fig. 1A When rollers 154 of Fig. 1A are rotated in the direction indicated by the arrows, the bar of metal, now separated into four strands, will be drawn through the rollers and would move in a direction out of, and perpendicular to, the surface of the paper.
  • the bar, or strands may be regarded a ⁇ having a length, a width and a height. The width and the height are cross sectional dimensions. Rollers 154 predominately form and affect the cross sectional dimensions of the bar or strands.
  • roller stand S the axes of the rollers, indicated by dashed lines 166 and 168, are usually adjustable with respect to each other. This permits adjustment of the separation distance between the surfaces of the rollers.
  • the adjustability of the axes is indicated by the arrows 171 associated with axes 166 and 168.
  • the separation distance between the rollers affects the form of the bar and the cross sectional area of the strands created.
  • the ability to vertically adjust also permits compensation for wear of the roller surfaces.
  • the cylindrical surfaces of the rollers are conventionally sculpted, or dimensioned, to contain circumferential grooves 170 and ridges 172.
  • a ridge as the word is used herein, may present a flat top surface, as illustrated in Fig. 1A, or may rise to a nearly pointed or a pointed surface, as in roller 144 of Fig. 1.
  • the grooves and ridges serve to form the bar in a pass.
  • the cross sectional area of the bar will exhibit a configuration conforming or semi- conforming to the cross sectional area between the rollers. The degree of confirmation depends upon the design of the rollers and the extent to which they contain free space in or around the grooves.
  • the grooves are designed with respect to the anticipated cross sectional area of the incoming bar.
  • the separation distance of the rollers may be adjusted such that the metal of the bar is forced to flow into, conform to, and fill all of the space of the groove. Excess metal, in such case, may move during the pass -8- toward the free space at the side of the rollers.
  • the grooves may also be designed, in conjunction with the separation distance, to a depth that defines a free space therein. The free space serves to substantially eliminate the flow of metal from a groove during a pass.
  • the area designated 90 illustrates the portions of ridges 146, 147 and 148 that correspond to the slope angles of central portions of the strands formed by the ridges.
  • the areas designated 165 and 166 comprise illustrative central portions of sides of a strand.
  • the slope angle of the strands in their "central portions” is referred to because it is against these -9- side walls of the strands that the slitter rollers, to be discussed below, either do or do not "interfere", or do or do not exert a lateral force.
  • a lateral force can be exerted by ridge of a slitter roller. When this ridge exerts the lateral force, it is said that the ridge has a slope angle, at least in portions corresponding to central portions of the strand, that would “interfere” with the slope angle of the strand.
  • the actual slope angle in "non-central" portions where, for instance, strand 150b or strand 150c, as illustrated in Fig.
  • Fig. 5B intersect the thin connecting portion separating the two strands, is not so significant. It is the slope angle along the "central portions" of the side slope of the strand that is important. These central portions either will receive a lateral force from the interference of the slitter roller slope angle.
  • Fig. 5B which is included for illustrative purposes, not as part of the preferred embodiment, one ridge of slitter roller 160 is shown inserted within or between the side walls of strand 150c and 150d to the point where it touches or virtually touches the thin connecting portion. It may be that where the peak of the ridge on slitter roller 160 meets or almost meets the thin connecting portion, the slope angle of the ridge is in fact less than the slope angle of strands 15Od.
  • the slope of the inside central portion of the wall of strand 150d is defined by the angle between tangent 112 drawn to that inside strand wall and vertical 122. This angle is illustrated as angle 106 in Fig. 5B.
  • the slope of the corresponding central portion of the ridge of the slitter 160 is illustrated by angle 104 drawn between vertical 122 and tangent 119 drawn at a "central portion" of the outside of the ridge of slitter roller 160.
  • a metal bar 150 moves in the direction of arrow 180 past five roller stands.
  • First rollers 140 are shown installed with their axis of rotation in the vertical direction.
  • rollers 140 have a central groove 139 that is not shown in Fig. 1 but is shown in Fig. 3A.
  • bar 150 proceeds through the series of roller stands in the direction of arrow 180, it takes on new cross sectional shapes as a function of the shape of the grooves and the ridges found in the surface of the rollers, and, to some extent, of the separation distance between the rollers in a pair.
  • Rollers 160 and 162 are slitter rollers. As illustrated in Fig. 1, roller 160 slits bar 150 into a central portion and two outside strands, 150a and I50d. Slitter roller 162 slits the central portion of bar 150 into strands 150b and 150c.
  • slitter roller 162 After the four separated strands emerge from slitter roller 162, they will be formed into metal rounds by a further series of forming rollers, as is known in the art. Such forming rollers are not illustrated in Fig. 1.
  • Fig. 2A illustrates rollers 140 installed with their axes of rotation in the vertical direction.
  • Fig. 3A illustrates one forming roller 140 in greater detail. The separation distance between the roller 140 surfaces is established such that one central groove
  • each roller conforms each end portion of bar 150 to the dimensions of the groove.
  • the adjustment of the separation distance between rollers 140 determines, the width of the bar.
  • the height of groove 139 determines the height of each end portion of bar 150 as it passes rollers 140. Free space 141 between the rollers accommodates the flow of any excess metal from the ends of the bar into the central portion of the bar.
  • Rollers 142 of Fig. 2B are illustrated installed with their axes of rotation in the horizontal direction, as are all succeeding roller pairs.
  • Fig. 3B illustrates one roller 142 in greater detail.
  • Rollers 142 have sculpted in their surface a series of grooves 143a and flat ridges 143. The separation distance between rollers 142 is adjusted such that the metal of the bar fills the space in the central portion of the rollers between the roller surfaces. Thus, the height and shape of at least the central portion of the bar is formed by rollers 142. Excess metal is accommodated by being permitted to flow to the outside space between the two rollers.
  • bar 150 is guided between roller pairs 140, 142, 144 and the slitter rollers.
  • the grooves and ridges of one roller pair can be aligned in combination with the grooves and ridges of a prior roller pair. They can be dimensioned in combination to create an effect in sequence.
  • Both rollers 144 in the preferred embodiment contain three ridges 146, 147 and 148. Although, it is preferred that both rollers contain the ridges, one roller with the ridges could suffice.
  • Fig. 4 illustrates one roller 144 in greater detail. Ridges 146, 147 and 148 are dimensioned to establish four strands in bar 150, namely 150a, 150b, 150c and 150d. The four strands are connected by thin connecting portions. Strands 150a and 150d are outside strands. Strands 150b and 150c are middle strands. Ridges 146, 147 and 148 not only establish thin connecting portions between four serial strands but also establish certain slope angles that the strands assume.
  • Roller pair 144 also contains two central grooves 145 that provide for free space 145a above middle strands 150b and 150c formed in grooves 145.
  • the free space permits the forming of the thin connecting portions by the rollers of pair 144 without redistributing metal from the middle strands to the outside strands.
  • the free space accommodates a certain variance in cross sectional area of middle strands 150b and 150c.
  • Slitter rollers 160 one of which is illustrated in Fig. 5, will slit the bar 150 comprised of four serial strands 150a, 150b, 150c and 150d connected by thin connecting portions, as illustrated in Fig. 2C, into a middle portion comprised of strands 150b and
  • Slitter rollers 162 one of which is illustrated in Fig. 6, separates middle section 150b and 150c connected by thin connecting portions, as illustrated in Fig. 2D, into two separate strands 150b and 150c as illustrated in Fig. 2E.
  • Figs. 2F and 2G illustrate a subsequent working of the four separated strands 150a, 150b, 150c and 150d by rollers by 152 and rollers 154 into four uniform rounds. This subsequent simultaneous working, illustrated in Figs. 2F and 2G, is understood by those skilled in the art. Hence, the details of such working will not be further discussed. In a review of Figs.
  • bar 150 as it emerges from rollers 140 has a predetermined width and the height of its end portion is determined.
  • Bar 150 as it emerges from rollers 142 of Fig. 2B has the height of its central portion determined.
  • bar 150 as it emerges from rollers 142 contains in fact four portions separated by thick connecting portions, the thick connecting portions being formed by ridges 143. Bar 150, after completing the pass of rollers 140 and 142, is known to be divided, by one who is informed of the dimensions of rollers 140 and 142, into four portions of substantially equal area.
  • One problem to be solved in the simultaneous forming of four metal rounds is maintaining the uniformity of the cross sectional area of the four -14- metal rounds. That is, the diameter of the rounds should con orm to specifications within a certain tolerance.
  • the words "substantially equal area” are used herein to indicate that the cross sectional area of the four portions would, if formed into rounds, have diameters that conformed to the specifications within the given tolerances.
  • the passes are arranged such that the bar passes first through rollers 140 and then past rollers 142. Reversing the progress through the first two pair of forming rollers, i.e. putting rollers 140 downstream of rollers 142, should yield a somewhat equivalent result. That is, bar 150 subsequent to both passes could be divided into four portions of substantially equal cross sectional area. As discussed above, the first two passes by the forming rollers conform entering bar 150 to four portions of substantially equal cross sectional areas. Pre-slitter rollers 144 separate the bar into four strands separated by thin connecting portions. The substantially equal cross sectional area is maintained. Pre-slitter rollers 144 also establish slope angles of the strand.
  • the two outside strands are first slit from the two middle strands by slitter rollers 160. Subsequently, the two middle strands are slit by slitter rollers 162. This is illustrated in Fig. 1 and Figs. 2d and 2e.
  • the slitting is performed by applying a lateral horizontal force to the walls of the strands, effecting a tearing along the thin connecting portions.
  • the lateral force is delivered by the interference of the slope angle of a side of a ridge of the slitter roller with the slope angle of a corresponding side of a strand.
  • ridge angle 118 is designed in combination with the ridge angles 146 and 148 of pre-slitter rollers 144 such that the slitter roller ridge angle is greater than the strand 150a or 150d inside slope angle.
  • the difference in the angle 118 and the angles 146 or 148 is approximately 22°.
  • Angle 118 is preferably approximately 52° while angles 146 and 148 are approximately 30°.
  • the inside slope angles of the ridges of slitter roller 160 that is, the angle formed by side 120, is less than the outside slope angle of strands 150b and 150c. The difference is approximately 5°.
  • outside slope angle of strands 150b and 150c are approximately 30° while the inside slope angles of the ridges of roller 160 are approximately 25°. In such a fashion, lateral separating forces are applied to strands 150a and 150d without applying a friction force to the two captive inside strands 150b and 150c.
  • side walls of the ridges of slitter roller 160 are shown approximately straight, i.e. side walls 118 and 120, it should be understood that the side walls of the ridge of slitter roller 160 could assume a continuously curved configuration. They should be designed in conformity with a similarly curved configuration given to strands 150a, 150b, 150c and 150d, at least in their central portions, by the ridges 146, 147 and 148 of pre-slitter rollers 144.
  • inside edge 134 of the ridge of second slitter roller 162 forms angle 138 with a vertical 132.
  • the inside slope angles of strands 150b and 150c make angle 97 between tangents 98 and vertical 112. In the preferred embodiment, angles 37
  • angles 138 are greater than angles 97. In fact, angles 138 exceed angles 97 by 5°. In the preferred embodiment, the inside slope angle 97 is essentially 30° and the ridge outside slope angles are essentially 35°. With such arrangement, second slitter roller 162 applies a lateral force and separates by tearing strand 150b from strand 150c.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shearing Machines (AREA)
  • Wire Processing (AREA)
  • Metal Rolling (AREA)
  • Forging (AREA)

Abstract

La présente invention porte sur un procédé et un appareil permettant de former simultanément quatre ronds en métal. On décrit deux paires de rouleaux de formage (140, 142), une paire de rouleaux de pré-découpage (144) et deux paires de rouleaux de découpage (160, 162). La combinaison des dimensions propres à leurs arêtes et à leurs cannelures permet de scinder une barre entrante (150) en quatre parties de surface pratiquement égale (150a, 150b, 150c, 150d) susceptibles d'être transformées simultanément en ronds de métal.
EP92924269A 1991-11-04 1992-11-04 Procede et appareil permettant de former simultanement quatre ronds en metal. Withdrawn EP0612274A4 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US78768391A 1991-11-04 1991-11-04
US787683 1991-11-04
PCT/US1992/009471 WO1993008937A1 (fr) 1991-11-04 1992-11-04 Procede et appareil permettant de former simultanement quatre ronds en metal

Publications (2)

Publication Number Publication Date
EP0612274A1 true EP0612274A1 (fr) 1994-08-31
EP0612274A4 EP0612274A4 (fr) 1995-01-25

Family

ID=25142264

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92924269A Withdrawn EP0612274A4 (fr) 1991-11-04 1992-11-04 Procede et appareil permettant de former simultanement quatre ronds en metal.

Country Status (7)

Country Link
EP (1) EP0612274A4 (fr)
KR (1) KR0137805B1 (fr)
AU (1) AU3064092A (fr)
BR (1) BR9206710A (fr)
CA (1) CA2122626C (fr)
MX (1) MX9206342A (fr)
WO (1) WO1993008937A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023048702A1 (fr) * 2021-09-22 2023-03-30 Primetals Technologies USA LLC Tige de fil rond de qualité de production élevée à l'aide d'un procédé de laminage à fente

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5626044A (en) * 1995-05-19 1997-05-06 Lara-Castro; Manuel Method of producing steel bars from billets
CN102909218B (zh) * 2012-09-29 2014-10-15 河北唐银钢铁有限公司 一种棒材连轧φ12螺四切分中、精轧孔型结构
CN109047334B (zh) * 2018-08-23 2020-12-04 中冶赛迪工程技术股份有限公司 用于热态板带纵向分条的生产方法及应用
CN112404131A (zh) * 2020-10-30 2021-02-26 张家港宏昌钢板有限公司 一种控制螺纹钢切分道次条形均匀性的方法

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Publication number Priority date Publication date Assignee Title
DE2553088A1 (de) * 1974-11-28 1976-08-12 Hille Eng Co Ltd Verfahren zum auswalzen von brammen sowie walzwerk zur ausfuehrung des verfahrens
JPS5680302A (en) * 1979-12-07 1981-07-01 Nippon Steel Corp Splitting method for breadth of slab into multiple fractions
US4357819A (en) * 1980-06-11 1982-11-09 Structural Metals, Inc. Method and apparatus for simultaneously forming three uniform metal rounds
JPS6092001A (ja) * 1983-10-27 1985-05-23 Nippon Kokan Kk <Nkk> 多条素材の切り裂きによる条鋼の製造方法および多条素材の切り裂き装置
JPH04100603A (ja) * 1990-08-20 1992-04-02 Nkk Corp １つのビレットから少なくとも４本の金属丸棒を同時に製造するための方法および装置

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US4193283A (en) * 1976-02-09 1980-03-18 Co-Steel International Limited Method of slitting a double or triple stranded bar
US4275491A (en) * 1977-02-08 1981-06-30 Roberto Marinucci Multi-complex shear device for splitting hot metallic bars into several smaller bars
US4204416A (en) * 1977-12-20 1980-05-27 Chumanov Julian M Method of rolling section billets
JPS57112904A (en) * 1980-12-29 1982-07-14 Sumitomo Metal Ind Ltd Production of steel sheet pile

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Publication number Priority date Publication date Assignee Title
DE2553088A1 (de) * 1974-11-28 1976-08-12 Hille Eng Co Ltd Verfahren zum auswalzen von brammen sowie walzwerk zur ausfuehrung des verfahrens
JPS5680302A (en) * 1979-12-07 1981-07-01 Nippon Steel Corp Splitting method for breadth of slab into multiple fractions
US4357819A (en) * 1980-06-11 1982-11-09 Structural Metals, Inc. Method and apparatus for simultaneously forming three uniform metal rounds
JPS6092001A (ja) * 1983-10-27 1985-05-23 Nippon Kokan Kk <Nkk> 多条素材の切り裂きによる条鋼の製造方法および多条素材の切り裂き装置
JPH04100603A (ja) * 1990-08-20 1992-04-02 Nkk Corp １つのビレットから少なくとも４本の金属丸棒を同時に製造するための方法および装置
EP0597093A1 (fr) * 1990-08-20 1994-05-18 Nkk Corporation Procede de fabrication de barres metalliques et appareil associe

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Title
PATENT ABSTRACTS OF JAPAN vol. 16, no. 335 (M-1283) 21 July 1992 & JP-A-04 100 603 (NKK) 2 April 1992 *
PATENT ABSTRACTS OF JAPAN vol. 5, no. 151 (M-89) 24 September 1981 & JP-A-56 080 302 (SHIN NIPPON SEITETSU) 1 July 1981 *
PATENT ABSTRACTS OF JAPAN vol. 9, no. 235 (M-415) 21 September 1985 & JP-A-60 092 001 (NIPPON KOKAN) 23 May 1985 *
See also references of WO9308937A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023048702A1 (fr) * 2021-09-22 2023-03-30 Primetals Technologies USA LLC Tige de fil rond de qualité de production élevée à l'aide d'un procédé de laminage à fente

Also Published As

Publication number Publication date
KR0137805B1 (ko) 1998-07-15
CA2122626C (fr) 1998-12-08
MX9206342A (es) 1993-11-01
CA2122626A1 (fr) 1993-05-13
BR9206710A (pt) 1995-05-02
EP0612274A4 (fr) 1995-01-25
AU3064092A (en) 1993-06-07
WO1993008937A1 (fr) 1993-05-13

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