EP0504219A1 - Cable en acier pour le renforcement de materiaux d'enrobage, notamment de beton, et procede de fabrication de ce cable. - Google Patents

Cable en acier pour le renforcement de materiaux d'enrobage, notamment de beton, et procede de fabrication de ce cable.

Info

Publication number
EP0504219A1
EP0504219A1 EP91900314A EP91900314A EP0504219A1 EP 0504219 A1 EP0504219 A1 EP 0504219A1 EP 91900314 A EP91900314 A EP 91900314A EP 91900314 A EP91900314 A EP 91900314A EP 0504219 A1 EP0504219 A1 EP 0504219A1
Authority
EP
European Patent Office
Prior art keywords
steel wire
circle
section
diameter
cross
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
EP91900314A
Other languages
German (de)
English (en)
Other versions
EP0504219B1 (fr
Inventor
Gyula Czomba
Cs Laszlo Kov
K Andor Lipt
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.)
December 4 Drotmuvek
Original Assignee
December 4 Drotmuvek
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 December 4 Drotmuvek filed Critical December 4 Drotmuvek
Publication of EP0504219A1 publication Critical patent/EP0504219A1/fr
Application granted granted Critical
Publication of EP0504219B1 publication Critical patent/EP0504219B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/003—Drawing materials of special alloys so far as the composition of the alloy requires or permits special drawing methods or sequences
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
    • B21C37/045—Manufacture of wire or bars with particular section or properties
    • 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

Definitions

  • the invention relates to a steel wire for reinforcing an embedding material, in particular for reinforcing concrete, and to the method for producing the
  • the steel wire according to the invention not only serves to reinforce the concrete or for prestressing, but it is also possible to use the steel wire in other areas. So e.g. the use of steel wire had also spread to the rubber industry, with some products being reinforced with steel wire, e.g. for conveyor belts, for rubber tires of vehicles. With regard to the fact that the largest amount of steel wire is used in reinforced concrete structures, we will describe the application of the solution according to the invention in connection with the concrete, the viewpoints of the application - analogously - also referring to other areas.
  • the steel wires commonly used to reinforce concrete structures are obtained directly by rolling or by further processing rolled wires.
  • the steel wires used for prestressing the concrete with a high crack resistance / R m 1600-2000 MPa / are cold drawn products.
  • the steel wire prestressing the concrete is assigned the task that the concrete structure embedding the steel wire can also be loaded with the force that results in it, which causes tensile stress.
  • the framework of the known steel wires that occurs during prestressing, reinforcement of the concrete either has a discontinuous or periodic format, or it has a spiral configuration.
  • the cross section of the steel wire with the periodic skeleton is by no means
  • the periodic skeleton is designed or the cross-section deformed in separate work steps, as a result of which in the material of the steel wire the fiber texture - which was created earlier during the drawing process - and the secondary fibrousness is destroyed during the later work steps, as a result of which the mechanical parameters of the steel wire / bending number , Stretching / impaired.
  • the known solutions we would like to mention the Hungarian patent specification HU-PS 159 837, in which steel wire and the method for the production are described.
  • the wire rod is drawn cold, after which the gradually expanding and disappearing sloping skeleton is brought about with a cylinder group for flattening and rib design.
  • the other disadvantage is that the service life of the cylinders is short due to the high load.
  • R m 1600-2000 MPa / the lifespan of the cylinders is so short due to the increased use that the application seems inappropriate.
  • the Hungarian patent HU-PS 158 074 proposes a solution for the production of high-strength steel wires.
  • the invention sets the goal of eliminating the errors, imperfections and other disadvantages of the known, same-purpose solutions, more precisely, to create a cold-drawn steel wire that has an equivalent framework in all cross sections, none in the foot ends of the framework there are sharp corners, furthermore, which has a characteristic fibrous texture and secondary fibrousness.
  • the aim of the method according to the invention was that it should not essentially deviate from the customary method of cold drawing, the method should include one simple and cheap means, no additional operations and means should be claimed, in summary, the production should be possible in a single operation, furthermore the usual fibrous texture and secondary fibrousness of the cold drawn wires should not be destroyed.
  • the set goal is achieved in that the cross section is delimited by a three-armed epitrochoid contour line and has a spiral-like skeleton which has fins which gradually emerge and blur along three production strips.
  • the method according to the invention ensures that the set goal is achieved by removing from the wire with a circular cross section in the course of a cold drawing
  • the method according to the invention expediently represents a plurality of work steps forming a process. It can happen that the wire serving as the starting piece has to be subjected to a preforming in order to obtain a steel wire with the appropriate surface quality and good dimensions for the work steps according to the invention, which are taken in the narrower sense . A material in such a state is called a preformed steel wire. This designation is also understood if the preforming is unnecessary in the course of implementing the method according to the invention, at least within the course of the method according to the invention, taken in the narrower sense.
  • the preformed steel wire which has a cylindrical or circular cross section, is pulled through a stationary drawing tool, the drawing hole of which determines a cross section with a three-armed epitrochoid contour line.
  • the circle that can be written on the cross section has the diameter d k / the radius r k /.
  • the cross section of the semi-finished steel wire obtained during the above-mentioned shaping is around 16-30% smaller than that of the preformed steel wire. This means that in the course of pulling on the stationary drawing tool there is a reduction in the cross-section of 16-30%.
  • the semi-finished steel wire with the cross section with the epitrochoid contour line is pulled through a rotating pulling tool - likewise in the cold state.
  • the drawing hole of the rotating drawing tool has a hexagonal cross section with rounded tips, and has a distorted spiral surface, which results in the skeleton, with a constant thread pitch.
  • This rotating, known pulling tool is free-running and supported in the usual way.
  • the product that leaves the rotating drawing tool is considered to be a finished steel wire.
  • the finished steel wire can be wound onto the drum.
  • the mutual distance between the ribs is 1.6 - 2.5 times the mean diameter, in the contour line of the cross section of the steel. interpreted wire, ie
  • Step designed by pulling on the drawing tools.
  • the tools required for any preforming, the rollers deflecting and moving the steel wire, as well as the stationary drawing tool and the rotating drawing tool are expediently arranged in such a way that the steel wire can be designed in a single production process.
  • the system must be provided with other necessary means known per se, for example for lubrication and cooling, furthermore for the storage of the rotating tool, provide for the organs that absorb axial and radial loads.
  • the design of the peculiar drawing holes of the drawing tools can expediently be carried out using the spark erosion. procedure.
  • the to the spark erosion process. required electrode can be generated with the system according to the Hungarian patent specification 156 607.
  • the epitrochoid determination in question is possible according to the following:
  • r e the radius of the one that derives the trochoid
  • the area of the cross section of the steel wire according to the invention delimited by epitrochoid curves, can be replaced by the area of the circle with the central radius.
  • the essential characteristic of the steel wire according to the invention can therefore be seen in the fact that the contour line of the cross section is a three-armed epitrochoid, the maximum depth of the frame corresponding to the difference in the radius of the inscribing circle of the cross section, along three generative strips and the radius of the inscribed circle, the skeleton gradually unfolds and disappears and is designed with a constant thread pitch.
  • the quotient of the radius of the writable circle of the cross section and the radius of the writable circle is at most 1.15, the thread pitch of the ribs being 10-15 times the mean diameter of the cross section.
  • the essential characteristic of the method according to the invention can be seen in that the steel wire serving as the output with a circular cross section or a possibly preformed steel wire is pulled through a stationary drawing tool, whereby the cross section is reduced by 16-30% and a semi-finished steel wire with a three-armed epitrochoid contour line is created , after which the semi-finished steel wire is drawn through a free-running but supported drawing tool, which has a constant thread pitch, a distorted spiral surface and a drawing hole with a sexagonal cross-section with rounded tips, in which the Area of the hexagon corresponds to the diameter of the circle, which can be inscribed as an inner tangent to the contour line of the finished steel wire, while the width of the hexagon corresponds to the diameter of the marking circle, which corresponds to the contour of the finished one
  • the steel wire according to the invention and the method used for the production are based on the enclosed
  • FIG. 3 shows the cross section of the steel wire following the preforming and the cross section of the semi-finished steel wire, drawn on top of one another;
  • Figure 4 shows the cross section of the drawing hole of the rotating drawing tool and the cross section of the semi-finished steel wire, drawn on top of each other.
  • Geometric ratios are expediently chosen so that the maximum height of the framework 5 corresponds to the 4 to 7% of the mean diameter.
  • the sketch according to FIG. 2 represents a possible embodiment of the plant for the production of the steel wire according to the invention.
  • the method according to the invention is described in detail.
  • the emerging steel wire 1 represents the material entered as an example.
  • the material must be subjected to a heat treatment, depending on the particular need Surface preparation is required, the cross-section can possibly be changed with the preparatory tools 11.
  • the rollers 10 secure the movement, guidance and deflection of the steel wire 1.
  • the operations previously mentioned are known per se and do not belong to the scope of the invention.
  • the cross section of the material gradually decreases, the strength increases.
  • the steel wire is produced, the shaping of which takes place using the method according to the invention - in the narrower sense - taken. This means that the individual preforming operations can take place in separate processes.
  • the preformed steel wire - which is in the cold state - is pulled through the stationary drawing tool 2.
  • the pull hole has a three-armed epitrochoid cross section.
  • the steel wire 6 entering the stationary drawing tool has a circular cross section, the emerging semi-finished steel wire 8 - as can be seen in FIG. 3 - being profiled.
  • the cross section of the steel wire - depending on the material quality - decreases by about 16-30%.
  • the preformed steel wire 6 also has a circular cross section, which can be characterized by the diameter D 'following the preforming. /
  • the diameter D 'the eventu following preforming operations is smaller than the initial diameter D.
  • the semi-finished steel wire 8 - which is created after the stationary drawing tool 2 - has a cross section with a three-armed epitrochoidal contour line 4.
  • the semi-finished steel wire 8 is transformed into the finished steel wire 9 with the aid of the rotating drawing tool 3.
  • the rotating drawing tool 3 has a drawing hole, the cross section of which represents a hexagon with rounded tips.
  • the cross-section has the contour line 7.
  • the drawing hole shows a uniform thread pitch in the axial direction, it has a distorted spiral surface.
  • the rotating drawing tool is supported in a manner known per se, it is free-running. In the case of the hexagon with the contour line 7 and chipped off points, this corresponds to
  • Point width 1 the diameter d k of the writable circle with the cross section of the semi-finished steel wire 8 with the contour line 4, at the same time the area width 1 corresponds to the diameter of the writable circle / d b /.
  • the rotating drawing tool 3 is also designed using the spark erosion.
  • the finished steel wire 9 can be wound onto the drum 12 / FIG. 2 /.
  • the required force can be pulled in part by the Drum 12 are exercised.
  • the skeleton is designed without any separate technological phase, simply by pulling it on the drawing tools.
  • Another advantageous characteristic is that the steel wire retains the fiber texture created during the cold drawing, the secondary fiberiness, as a result the mechanical properties will be favorable, e.g. the number of bends and the elongation.
  • Another advantage of the steel wire according to the invention is that slipping out of the embedding material, e.g. Concrete, and torsion through the skeleton is prevented by the epitrochoid shape. With such a geometric design, there are no sharp corners, as a result of which stress-collecting parts in the finished steel wire are avoided.
  • the steel wire according to the invention can be used as an independent strand or twisted in strands.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Ropes Or Cables (AREA)
  • Metal Extraction Processes (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Wire Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)

Abstract

Câble en acier pour le renforcement de matériaux d'enrobage, notamment de béton, caractérisé en ce que la courbe du contour (4) de la section est une épitrochoïde à trois branches, et présente en outre un profil (5) à pas constant, s'enflant et disparaissant progressivement le long de trois génératrices, dont la profondeur maximale correspond à la différence entre le rayon (rk) du cercle décrit de la section et le rayon (rb) du cercle inscrit.
EP91900314A 1989-12-07 1990-12-07 Cable en acier pour le renforcement de materiaux d'enrobage, notamment de beton, et procede de fabrication de ce cable Expired - Lifetime EP0504219B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
HU646589 1989-12-07
HU896465A HU204452B (en) 1989-12-07 1989-12-07 Steel wire for reinforcing embedding material first for reinforcing concrete and method for producing such steel wire
PCT/HU1990/000080 WO1991009188A1 (fr) 1989-12-07 1990-12-07 Cable en acier pour le renforcement de materiaux d'enrobage, notamment de beton, et procede de fabrication de ce cable

Publications (2)

Publication Number Publication Date
EP0504219A1 true EP0504219A1 (fr) 1992-09-23
EP0504219B1 EP0504219B1 (fr) 1995-02-15

Family

ID=10971676

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91900314A Expired - Lifetime EP0504219B1 (fr) 1989-12-07 1990-12-07 Cable en acier pour le renforcement de materiaux d'enrobage, notamment de beton, et procede de fabrication de ce cable

Country Status (9)

Country Link
EP (1) EP0504219B1 (fr)
AT (1) ATE118581T1 (fr)
CZ (1) CZ278324B6 (fr)
DE (1) DE59008492D1 (fr)
FI (1) FI922370L (fr)
HU (1) HU204452B (fr)
PL (1) PL287630A1 (fr)
SK (1) SK278942B6 (fr)
WO (1) WO1991009188A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2904941A1 (fr) * 2006-08-21 2008-02-22 Meherenc De Saint Pierre He De Outil tournant pour mandrin a mors et procede d'usinage de l'outil

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10034041A1 (de) * 2000-07-13 2002-02-07 Bosch Gmbh Robert Wischanlage

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2928528A (en) * 1954-06-02 1960-03-15 Canada Steel Co Wire-drawing die
LU57977A1 (fr) * 1969-02-12 1970-09-08
CH530527A (de) * 1970-12-21 1972-11-15 Hufnagl Walter Verfahren und Rolle zum Herstellen eines im Kaltverformungsverfahren vorverfestigten, mit Rippen versehenen Betonbewehrungsstahles
DE2138598A1 (de) * 1971-08-02 1973-02-15 Hufnagl Walter Betonbewehrungsstab
PL135454B1 (en) * 1981-10-17 1985-10-31 Os Bad Rozwojowy Przemyslu Wyr Method of manufacturing tin plated brass wire of square cross-section
FR2574453B1 (fr) * 1984-12-07 1987-12-18 Montereau Acieries Armature metallique pour beton arme

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9109188A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2904941A1 (fr) * 2006-08-21 2008-02-22 Meherenc De Saint Pierre He De Outil tournant pour mandrin a mors et procede d'usinage de l'outil

Also Published As

Publication number Publication date
WO1991009188A1 (fr) 1991-06-27
FI922370A0 (fi) 1992-05-22
SK544590A3 (en) 1998-05-06
FI922370A7 (fi) 1992-05-22
DE59008492D1 (de) 1995-03-23
HUT56308A (en) 1991-08-28
HU896465D0 (en) 1990-02-28
FI922370L (fi) 1992-05-22
HU204452B (en) 1992-01-28
CZ278324B6 (en) 1993-11-17
CZ544590A3 (en) 1993-03-17
EP0504219B1 (fr) 1995-02-15
PL287630A1 (en) 1991-07-15
SK278942B6 (sk) 1998-05-06
ATE118581T1 (de) 1995-03-15

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