EP0399910B1 - Fil d'acier nervuré à haute adhérence et son procédé de fabrication - Google Patents

Fil d'acier nervuré à haute adhérence et son procédé de fabrication Download PDF

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Publication number
EP0399910B1
EP0399910B1 EP90401381A EP90401381A EP0399910B1 EP 0399910 B1 EP0399910 B1 EP 0399910B1 EP 90401381 A EP90401381 A EP 90401381A EP 90401381 A EP90401381 A EP 90401381A EP 0399910 B1 EP0399910 B1 EP 0399910B1
Authority
EP
European Patent Office
Prior art keywords
wire
ribs
section
rollers
ribbed
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
EP90401381A
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German (de)
English (en)
French (fr)
Other versions
EP0399910A1 (fr
Inventor
Paul Canobbio
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.)
ACOR ACIERS DE CONSTRUCTION RATIONALISES
Original Assignee
ACOR ACIERS DE CONSTRUCTION RATIONALISES
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Filing date
Publication date
Application filed by ACOR ACIERS DE CONSTRUCTION RATIONALISES filed Critical ACOR ACIERS DE CONSTRUCTION RATIONALISES
Priority to AT90401381T priority Critical patent/ATE103515T1/de
Publication of EP0399910A1 publication Critical patent/EP0399910A1/fr
Application granted granted Critical
Publication of EP0399910B1 publication Critical patent/EP0399910B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/02—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance
    • E04C5/03—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance with indentations, projections, ribs, or the like, for augmenting the adherence to the concrete
    • 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
    • B21B1/163—Rolling or cold-forming of concrete reinforcement bars or wire ; Rolls therefor

Definitions

  • the present invention relates to the preamble of claim 1 a ribbed steel wire with high adhesion, in particular for reinforcements for concrete or for welded mesh, cold deformed by rolling and cold provided with ribs inclined relative to the axis of the wire and arranged between narrow straight longitudinal portions not ribbed.
  • the invention also relates, according to the preamble to claim 4, to a method of manufacturing ribbed steel wire with high adhesion, in particular for reinforcements for concrete, according to which a first deformation is carried out using smooth rollers. cold of a smooth wire of circular section obtained by hot rolling, and then formed, using notched rollers, on the cold deformed wire, series of ribs inclined relative to the axis of the wire.
  • steel reinforcements having a cylindrical body comprising three rectilinear non-ribbed longitudinal zones alternating with three convex zones carrying ribs in the form of notches or latches inclined at an angle between 35 ° and 75 ° with respect to the longitudinal axis of the bar.
  • the locks are thus divided into three series of locks regularly distributed along each curved area of the bar, with a predetermined spacing between adjacent locks of the same series. The spacing and height of the locks are defined according to the nominal diameter of the bar.
  • Such a type of cold-scallowed steel wire by passing through three notched rollers after having undergone a first cold rolling operation by passing through three smooth rollers has an adhesion which is improved compared to that of smooth wires.
  • the notched steel wire of the aforementioned type subjected to the action of groups of three rollers during its shaping, undergoes transformations poorly distributed within the material and retains a triangular profile which is penalizing for a passage subsequent thread on automatic machines such as straightening machines or winders.
  • the triangular profile of the wire indeed prevents the wire from being guided correctly and carries in a stable manner on the rollers of the machines automatic processing such as straightening machines, in particular straightening machines with circular rollers, in which the dressing is carried out by passing the wire through two series of perpendicular rollers.
  • the steel wires notched with three series of latches or ribs exhibit significant work hardening gradients during cold deformation, which introduces limits in their mechanical characteristics, in particular with regard to plasticity and elongation. under maximum load.
  • the adhesion of the notched wires to three series of ribs is also not optimized because the ribs of two adjacent series of ribs are oriented in the same direction, which limits the entanglement of these ribs and therefore their action of detention.
  • Steel frames are also known which have a profile with four concave sides on which impressions are formed using pairs of rollers cut in relief.
  • Such threads have only very medium adhesions so that they can only be used for a limited number of applications, see DE-A 26 56 277, which is to be considered as the closest prior art.
  • the present invention aims to remedy the aforementioned drawbacks and to allow the production of ribbed steel wires whose mechanical properties are improved compared to existing products, and which are better suited to passing through automatic processing machines, in particular thanks to less wear on the ribs and better straightness of dressing.
  • the invention aims more particularly to allow the manufacture of ribbed steel wires whose profile remains very close to a circular profile and for which the work hardening gradients are reduced and the deformations remain homogeneous.
  • Another object of the invention is to allow the production of ribbed steel wires with improved properties, in particular as regards adhesion and plasticity, and with a lower reduction rate than according to known methods of manufacturing wires. ribbed.
  • a ribbed steel wire to high adhesion in particular for reinforcements for concrete, cold deformed by rolling and cold provided with ribs inclined with respect to the axis of the wire and arranged between straight longitudinal straight non-ribbed portions, comprising four narrow straight longitudinal non-ribbed portions between which are arranged four series of ribs inclined relative to the axis of the wire and characterized in that, whatever the series of ribs, the ribs of two adjacent series are offset in the axial direction and are oriented with the same angular deviation relative to the axis of the wire but in different directions so as to present a shape of ear.
  • the ribs have an angular distance i preferably equal to or close to 45 ° with respect to the axis of the wire and have an essentially trapezoidal profile.
  • the distance between the center of the wire and the outer surface of the ribs is at any point greater than or equal to the distance between the center of the wire and a narrow longitudinal section not ribbed.
  • the reduction rate representing the ratio between the final section of the ribbed steel wire and the initial section of the circular section wire obtained by hot rolling can be of the order of 20 to 30%.
  • the invention is particularly remarkable in that the stresses exerted on the wires are symmetrical with respect to two directions orthogonal to each other and perpendicular to the wire, which facilitates the subsequent treatments of the products and improves the mechanical qualities.
  • the ribs 110 may present with respect to the axis 100 of the wire 11 an angular difference i of between approximately 30 ° and 60 °. However, in order to increase the symmetries with respect to mutually perpendicular axes, it is preferable that the angular difference i is equal to or close to 45 °.
  • the ribs 110 of two adjacent series 101, 102; 102, 103; 103, 104; 104, 101 are offset in the axial direction and are oriented by presenting the same angular deviation i, for example 45 °, with respect to the axis 100 of the wire 11 but in different directions so as to have an ear shape.
  • Such alternating orientation is not possible with notched wires provided with only three series of ribs, because in this case there are always two series of adjacent ribs oriented in the same direction, which does not allow the adhesion to be optimized. , nor to distribute in a balanced way all the stresses exerted on the wire.
  • Each rib 110 has in section along a plane perpendicular to the axis of the rib a substantially trapezoidal profile with flanks 112, 113 inclined at an angle e, which can be equal for example to 45 °, relative to a radial direction, and a flat top 111 having a width b and located at a height a with respect to the non-ribbed surface of the wire (FIG. 3).
  • the height a of the ribs 110, the width b of the ribs 110 in the middle of these and the pitch or spacing c between two successive ribs 110 of the same series of ribs are defined in function of the nominal diameter d of the steel wire.
  • the annexed table gives values of the different parameters for different nominal diameters of ribbed steel wires with high adhesion produced according to the invention and making it possible to define values of the projected area of the ribs S corresponding to common applications in the field of reinforcing wires for concrete or wires for welded mesh. It is however naturally possible to produce ribbed steel wires in accordance with the invention, the parameters of which have slightly different values depending on the applications envisaged.
  • the ribbed wires according to the invention have a profile which, apart from the ribs 110, is very close to a circular profile ( Figure 2).
  • Figure 2 the distance D2 between the center of the wire and the outer surface of the ribs 110 is at any point greater than or equal to the distance D1 between the center of the wire and a narrow non-ribbed longitudinal portion.
  • the ribbed wire 11 according to the invention which has four series of ribs 105 to 108 may have an adhesion defined by the projected surface of the ribs S, the value is at least as great as that of the adhesion defined by the projected surface of the ribs S of a ribbed wire with three series of ribs.
  • the height of the ribs in the case of a ribbed wire with four series of ribs is however less than the height of the ribs of a ribbed wire with three series of ribs.
  • the flattened wire 10a is then brought between a second pair of smooth rollers 3, 4 arranged immediately downstream of the first pair of rollers 1, 2 and placed in a horizontal plane H containing the wire 10a (FIG. 4).
  • the rollers 3, 4 comprise annular grooves 83, 84 of width substantially equivalent to the diameter of the wire 10, formed in the edge of the rollers 3, 4 and intended to form a wire 10b whose section is reduced compared to the initial section of the wire 10 and has an approximately square shape with two main directions of deformation perpendicular to each other.
  • the smooth wire 10b of square section undergoes a new cold deformation by passing through a third pair of rollers 5, 6 having on their edge an annular groove 85, 86 of circular section.
  • the rollers 5, 6 are arranged in a plane containing the wire 10b and offset by 45 ° relative to the plane V containing the rollers 1 and 2 of the first pair of rollers.
  • Grooves 850, 860 are formed in the grooves 85, 86 of the rollers 5, 6 ( Figures 9 and 11).
  • the rollers 5 and 6 thus contribute to giving the work-hardened wire 10b of square section a more circular shape by acting on diametrically opposite edges (211, 212) of the wire 10b of square section.
  • the grooves 850, 860 inclined for example by 45 ° relative to the center line of the grooves 85, 86, contribute to forming ribs on the peripheral surface of the wire 10c whose shape is complementary to that of the grooves 850, 860
  • the ribs 110 formed on the wire 10c are distributed in two series of ribs on two diametrically opposite portions of the wire 10c.
  • the wire 10c then passes between a fourth pair of rollers 7, 8 also having on their edge an annular groove 87, 88 of circular section.
  • the rollers 7, 8 are arranged immediately downstream of the rollers 5, 6 and are arranged in a plane containing the wire 10c and offset by 45 ° relative to the plane H containing the rollers 3 and 4.
  • the plane containing the rollers 7, 8 of the fourth pair of rollers is also perpendicular to the plane containing the rollers 5, 6 of the third pair of rollers.
  • Grooves 870, 880 are formed in the grooves 87, 88 of the rollers 7, 8 ( Figure 8).
  • the rollers 7, 8 make it possible, by acting on the diametrically opposite edges 213, 214 of the wire 10c, to form a wire 11 whose section has again become substantially circular and which is furthermore provided with four series of ribs.
  • the grooves 870, 880 are preferably inclined by 45 ° relative to the midline of the grooves 87, 88 to form on the peripheral surface of the wire 11 ribs whose shape is complementary to that of the grooves 870, 880.
  • the grooves 870, 880 are quite similar to the grooves 850, 860 and the wire 11 can thus be provided with four series of ribs 110 as indicated with reference to FIGS. 1 and 2.
  • Figures 9 to 12 show the shape of grooves 850, 860, 870, 880 formed in the grooves 85, 86, 87, 88 of the rollers 5, 6, 7, 8. These grooves are identical to each other but oriented in directions well defined so as to form four series of ribs 110 identical, but arranged in a crisscross manner in the manner of spikes on the wire 11 from the device constituted by the four pairs of rollers 1, 2; 3, 4; 5, 6; and 7, 8.
  • the reduction rate representing the ratio between the final section of the ribbed steel wire 11 and the initial section of the smooth wire with circular section 10 obtained by hot rolling is of the order from 20 to 30% and saves energy while reducing the rate of work hardening.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Metal Rolling (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Ropes Or Cables (AREA)
  • Laminated Bodies (AREA)
  • Insulated Conductors (AREA)
EP90401381A 1989-05-26 1990-05-23 Fil d'acier nervuré à haute adhérence et son procédé de fabrication Expired - Lifetime EP0399910B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90401381T ATE103515T1 (de) 1989-05-26 1990-05-23 Rippenstahl mit hoher haftfestigkeit und dessen herstellungsverfahren.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8906961A FR2647372A1 (fr) 1989-05-26 1989-05-26 Fil d'acier nervure a haute adherence et son procede de fabrication
FR8906961 1989-05-26

Publications (2)

Publication Number Publication Date
EP0399910A1 EP0399910A1 (fr) 1990-11-28
EP0399910B1 true EP0399910B1 (fr) 1994-03-30

Family

ID=9382071

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90401381A Expired - Lifetime EP0399910B1 (fr) 1989-05-26 1990-05-23 Fil d'acier nervuré à haute adhérence et son procédé de fabrication

Country Status (5)

Country Link
EP (1) EP0399910B1 (enrdf_load_stackoverflow)
AT (1) ATE103515T1 (enrdf_load_stackoverflow)
DE (1) DE69007677T2 (enrdf_load_stackoverflow)
ES (1) ES2054290T3 (enrdf_load_stackoverflow)
FR (1) FR2647372A1 (enrdf_load_stackoverflow)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9202127A (nl) * 1992-12-09 1994-07-01 Jacobus Lambertus Van Merkstei Draadmetaal en een werkwijze voor het vervaardigen daarvan.
FR2715591B1 (fr) * 1994-01-31 1997-01-10 Guy Croville Jeu de galets trois génératrices de crantage fil au carbone doux dit fil précontraint.
CN1057239C (zh) * 1996-04-10 2000-10-11 冶金工业部钢铁研究总院 冷轧带肋钢筋的装置
US5875669A (en) * 1996-12-09 1999-03-02 Kawasaki Steel Corporation Rolling method and rolling facility for manufacturing steel bars for concrete reinforcement
DE10105667A1 (de) * 2001-02-08 2002-09-26 Badische Stahlwerke Gmbh Betonstahl mit Rippen, Stahlbeton
FR2919639B1 (fr) * 2007-07-30 2009-11-13 Ugitech Fil crante pour armature de structure en beton, en acier inoxydable duplex.
DE202010017205U1 (de) 2010-02-18 2011-05-12 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Vorrichtung zur optischen Vermessung eines stift- oder stabförmigen Körpers
CN101942887A (zh) * 2010-09-09 2011-01-12 天津市建科机械制造有限公司 四面带肋钢筋
CN102168473A (zh) * 2011-01-30 2011-08-31 莱芜钢铁股份有限公司 一种大规格带肋钢筋及其加工工艺
RU2680153C2 (ru) * 2016-12-23 2019-02-18 Игорь Николаевич Тихонов Арматурный стержень периодического профиля

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3641799A (en) * 1970-07-16 1972-02-15 Bethlehem Steel Corp Deformed wire for concrete reinforcement
DE2123818B2 (de) * 1971-05-13 1979-08-16 Helmut 4224 Huenxe Dickmann Verfahren und Vorrichtung zum Herstellen eines gerippten Betonbewehrungsstabs
DE2656277A1 (de) * 1976-12-11 1978-06-15 Fels Werke Peine Salzgitter Verfahren und vorrichtung zum herstellen von betonbewehrungsstaeben

Also Published As

Publication number Publication date
FR2647372B1 (enrdf_load_stackoverflow) 1994-04-22
EP0399910A1 (fr) 1990-11-28
FR2647372A1 (fr) 1990-11-30
ES2054290T3 (es) 1994-08-01
DE69007677T2 (de) 1994-09-01
ATE103515T1 (de) 1994-04-15
DE69007677D1 (de) 1994-05-05

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