EP0392039B1 - Fil d'acier pour le renforcement du béton - Google Patents

Fil d'acier pour le renforcement du béton Download PDF

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Publication number
EP0392039B1
EP0392039B1 EP89106394A EP89106394A EP0392039B1 EP 0392039 B1 EP0392039 B1 EP 0392039B1 EP 89106394 A EP89106394 A EP 89106394A EP 89106394 A EP89106394 A EP 89106394A EP 0392039 B1 EP0392039 B1 EP 0392039B1
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EP
European Patent Office
Prior art keywords
sheet
steel
fibre
width
length
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
EP89106394A
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German (de)
English (en)
Other versions
EP0392039A1 (fr
Inventor
Eckhard Dipl.-Ing. Goldau
Ulrich Dipl.-Ing. Wolf
Hans-Georg Dipl.-Ing. Longerich
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.)
FATEK BETONFASERTECHNIK GMBH
Original Assignee
TECTA GmbH
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 TECTA GmbH filed Critical TECTA GmbH
Priority to DE8989106394T priority Critical patent/DE58903045D1/de
Priority to EP89106394A priority patent/EP0392039B1/fr
Priority to AT89106394T priority patent/ATE83406T1/de
Publication of EP0392039A1 publication Critical patent/EP0392039A1/fr
Application granted granted Critical
Publication of EP0392039B1 publication Critical patent/EP0392039B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/06—Making more than one part out of the same blank; Scrapless working

Definitions

  • the invention relates to a steel fiber in the form of a sheet metal strip as a reinforcing element for concrete according to the preamble of claim 1 and to a method for its production according to the preamble of claim 4.
  • a generic steel fiber and a method for its production is e.g. known from DE-C-2824777.
  • steel fibers are used as reinforcement elements.
  • a concrete reinforced with steel fibers is improved in its properties, for example tensile strength, breaking strength, shear strength, stretchability, toughness, dynamic strength, fatigue strength. It is therefore used on a large scale.
  • the steel fiber should have the following properties: It should be hard and strong. It should not break when mixed with concrete or aggregates. It should not be too short or too thick, otherwise it is insufficient in its strengthening. It should not be too long or too thin, otherwise it will tend to form spherical lumps of cement.
  • a steel fiber cross section of 0.1 to 1.0 mm2 In general, a steel fiber cross section of 0.1 to 1.0 mm2, a steel fiber length of 20 to 50 mm and a weight fraction of the steel fibers of 15 to 150 kg / m3 of concrete are recommended. In addition to their properties, the cost-effective production of steel fibers is a top priority.
  • the steel fiber is a round fiber which is cut off by a corrugated wire (EP 0 130 191 B1; GB 1 446 855 A1).
  • the steel fiber is a steel chip that is milled off from a steel block (DE 2 723 382 C3; DE 2 904 228 C2).
  • the steel fiber is in the form of a sheet metal strip which is sheared off from a sheet (DE 2 359 368 A1; DE 2 359 367 B2; DE 2 824 777 C3).
  • the steel fibers belonging to the third group have excellent properties.
  • the process for their production has hitherto been associated with the lack of high production costs: the width of the steel sheet produced in the desired fiber thickness is split to the desired fiber length, after which the fibers are sheared off in the desired width.
  • the invention seeks to remedy this.
  • the invention has for its object to provide steel fibers with further improved properties in a cost-effective manufacturing process from a sheet as a starting material.
  • the sheet metal strips are first brought to a width which is equal to the length of the steel fiber.
  • the sheet width is theoretically arbitrary; in practice it depends on the width of the sheets on the market, and on the other hand on the dimensions of the punch press insert and the dimensions in which the tool can be produced economically.
  • the fiber length is also fixed in the known methods with the sheet metal strip width, this is variable in the invention: by exchanging the tool inserts, fibers of different dimensions, including lengths, can be produced for a given sheet metal strip width.
  • the sheet is processed without scrap. The punching of the steel fibers and the introduction of the bead-like depressions takes place in the same operation.
  • the beads can be designed variably.
  • the tool punches in a - for example in 4 - process or work steps. Then in the 1st step every 1st, 4th, 7th etc. row, in the 2nd step every 2nd, 5th, 8th etc. row, in the 3rd step every 3rd, 6th, 9th etc. Punched rows, in the 4th step the strips are punched between the rows. When adjusting the sheet width to the steel fiber length, the entire sheet is processed. All work steps are carried out simultaneously in the same follow-up tool; the tool engages in different places on the sheet metal to carry out one of a working steps. According to (a-1) - in the exemplary embodiment 3 - start-up strokes, all steel fibers are punched in the following tool in each working cycle.
  • the steel fiber itself has a high degree of inherent stability due to the beads / profiles on the edge.
  • the edge formation also leads to better interlocking with the concrete. Due to the lack of waves, there can be no stretching of the steel fiber under load.
  • the steel fiber selected as an exemplary embodiment consists of a sheet metal strip 1. It has a selectable fiber length 1 and a selectable fiber width b. In the exemplary embodiment, the fiber length is approximately 36 mm, the fiber width is approximately 2 mm. Its thickness is approximately 0.4 mm. These dimensions can be changed within limits.
  • the metal strip 1 is provided on its longitudinal edges 2, 3 with bead-like depressions 4.
  • the bead-like depressions 4 are on the one longitudinal edge 2 compared to those on the other longitudinal edge 3 in the longitudinal direction staggered:
  • a bead-like depression on the other longitudinal edge 3 is provided symmetrically between two bead-like depressions 4 on one longitudinal edge 2.
  • the bead-like depressions 4 create meandering lines in the view and in the rear view. Another configuration is possible by changing the arrangement and design of the bead-like depressions 4.
  • the output for the process for producing the steel fiber with the fiber length 1 and the fiber width b is a sheet with the sheet length L and the sheet width B.
  • the sheet length L is arbitrary.
  • the sheet width B is adapted to achieve a scrap-free punching process to the dimensions of the sheet metal strip 1 to be punched. It also depends on the dimensions of the insertion of the punch press and the tool.
  • a, m and n are integers; a is greater than or equal to 2.
  • Steel fibers of fiber length l are arranged in the axial direction over the sheet width B with the interposition of a strip of fiber width bm, n steel fibers of fiber width b are arranged next to one another in the transverse direction over the partial sheet length L1.
  • a 3; there are therefore three procedural steps.
  • Sections I, II and III are of equal length; they are in the same follow-up tool at the same time.
  • the first, third, fifth, thirteenth, fifteenth and seventeenth rows are punched from the full sheet metal - section I in FIG. 4, that is to say the first and each row after the next.
  • the sheet has the shape shown in FIG. 4 in section II.
  • the remaining rows namely the 2nd, 4th, 6th, ... 14th, 16th and 18th rows are then punched.
  • the sheet has the shape shown in FIG. 1 in section III.
  • the 4 strips - which are used for the exact manufacture of the steel fibers - are punched at the edge and between the individual steel fibers, which also have the dimensions of one steel fiber.
  • more than three fiber rows can be distributed over the sheet width B and integer multiples of 18 over the partial length L1.
  • the bead-like depressions 4 are simultaneously introduced into the sheet metal strip 1.
  • the steel fibers are used as reinforcement elements for concrete, screed and mortar.
  • the process is used to manufacture these steel fibers.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Reinforcement Elements For Buildings (AREA)

Claims (7)

  1. Fil d'acier, se présentant sous la forme d'une bande de tôle servant d'élément d'armature pour le béton, caractérisé en ce que la bande de tôle (1) est pourvue sur au moins l'un de ses bords longitudinaux (2;3) de cavités du genre de moulures.
  2. Fil d'acier selon la revendication 1, caractérisé en ce que les cavités en forme de moulure (4) d'un bord longitudinal (2) sont disposées de façon décalée dans la direction longitudinale par rapport à celles de l'autre bord longitudinal (3).
  3. Fil d'acier selon la revendication 1 ou 2, caractérisé en ce qu'une cavité en forme de moulure (4) est prévue sur l'autre bord longitudinal (3), symétriquement entre chaque fois deux cavités en forme de moulure (4) situées sur un premier bord longitudinal (2).
  4. Procédé de fabrication d'un fil d'acier servant d'élément d'armature pour le béton, a partir d'une tôle, caractérisé en ce que, dans le cas d'une longueur de fil l quelconque et d'une largeur de fil b quelconque, on estampe à partir de la tôle de longueur de tôle L et de largeur de tôle B, sur la largeur de tôle B > m . l et sur une longueur partielle L1 = n . b < L ou B > n . b
    Figure imgb0020
    Figure imgb0021
    et L1 = m . l < L
    Figure imgb0022
     , lors de chacune de (a - 1) étapes de procédé,
    Figure imgb0023
     fils, où a, m et n sont des nombres entiers et a ≧ 2.
  5. Procédé selon la revendication 4, caractérisé en ce que, sur la largeur de tôle B, en intercalant chaque fois une bande de la largeur du fil b, sont disposés m fils d'acier de longueur l orientés en direction axiale et, sur la longueur partielle de tôle L1, sont disposés n fils d'acier de largeur de fil b, les uns à côté des autres en direction transversale, le produit de la largeur de fil b et du nombre n des fils disposés les uns à côté des autres étant égal à un multiple entier de la longueur de fil l.
  6. Procédé selon la revendication 5, caractérisé en ce qu'à la aième étape de procédé, sont estampées (m + 1) bandes réalisées sous forme de fil d'acier.
  7. Procédé selon la revendication 5 ou 6, caractérisé en ce que, dans le cas de a étapes de procédé, le long de la longueur partielle de la tôle, L1 = n . b
    Figure imgb0024
     , sont estampées à la première étape de procédé les (x.(a-1)+1)ièmes rangées, à la deuxième étape de procédé les (x.(a-1)+2)ièmes rangées, à la (a - 1)ième étape de procédé les dernières rangées et, lors de la (a)ième étape de procédé, les bandes, x étant une variable entière comprise entre zéro et
    Figure imgb0025
EP89106394A 1989-04-11 1989-04-11 Fil d'acier pour le renforcement du béton Expired - Lifetime EP0392039B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE8989106394T DE58903045D1 (de) 1989-04-11 1989-04-11 Stahlfaser als bewehrungselement fuer beton.
EP89106394A EP0392039B1 (fr) 1989-04-11 1989-04-11 Fil d'acier pour le renforcement du béton
AT89106394T ATE83406T1 (de) 1989-04-11 1989-04-11 Stahlfaser als bewehrungselement fuer beton.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP89106394A EP0392039B1 (fr) 1989-04-11 1989-04-11 Fil d'acier pour le renforcement du béton

Publications (2)

Publication Number Publication Date
EP0392039A1 EP0392039A1 (fr) 1990-10-17
EP0392039B1 true EP0392039B1 (fr) 1992-12-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP89106394A Expired - Lifetime EP0392039B1 (fr) 1989-04-11 1989-04-11 Fil d'acier pour le renforcement du béton

Country Status (3)

Country Link
EP (1) EP0392039B1 (fr)
AT (1) ATE83406T1 (fr)
DE (1) DE58903045D1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK0529105T3 (da) * 1991-07-16 1994-08-22 Fatek Betonfasertechnik Gmbh Fremgangsmåde til fremstilling af et armeringselement til beton
DE4208080A1 (de) * 1992-03-13 1993-09-16 Vulkan Harex Stahlfasertech Verfahren und schneidwerkzeug zum herstellen von stahlblechfasern
DE102008034250A1 (de) * 2008-07-23 2010-01-28 Karl-Hermann Stahl Verfahren zur Herstellung von Stahlfasern

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52144424A (en) * 1976-05-24 1977-12-01 Takeo Nakagawa Manufacture of steel fiber for reinforcing concrete
FR2379332A1 (fr) * 1977-02-02 1978-09-01 Gazzotti Jean Procede et moyens de fabrication simplifiee par decoupage d'articles metalliques partiellement identiques ou semblables
BE892526A (fr) * 1982-03-16 1982-07-16 Cardelli Ezio Procede de fabrication de fils et installation destinee a la realisation du procede

Also Published As

Publication number Publication date
EP0392039A1 (fr) 1990-10-17
ATE83406T1 (de) 1993-01-15
DE58903045D1 (de) 1993-01-28

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