WO1997021888A2 - Fibre d'acier et procede permettant de la produire - Google Patents

Fibre d'acier et procede permettant de la produire Download PDF

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Publication number
WO1997021888A2
WO1997021888A2 PCT/DE1996/002379 DE9602379W WO9721888A2 WO 1997021888 A2 WO1997021888 A2 WO 1997021888A2 DE 9602379 W DE9602379 W DE 9602379W WO 9721888 A2 WO9721888 A2 WO 9721888A2
Authority
WO
WIPO (PCT)
Prior art keywords
steel fiber
steel
shearing
width
tool
Prior art date
Application number
PCT/DE1996/002379
Other languages
German (de)
English (en)
Other versions
WO1997021888A3 (fr
WO1997021888A9 (fr
Inventor
Wilhelm Kämereit
Ferdinand Dietz
Original Assignee
Mannesmann Ag
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
Priority claimed from DE19627347A external-priority patent/DE19627347A1/de
Application filed by Mannesmann Ag filed Critical Mannesmann Ag
Priority to AU18694/97A priority Critical patent/AU1869497A/en
Publication of WO1997021888A2 publication Critical patent/WO1997021888A2/fr
Publication of WO1997021888A9 publication Critical patent/WO1997021888A9/fr
Publication of WO1997021888A3 publication Critical patent/WO1997021888A3/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P17/00—Metal-working operations, not covered by a single other subclass or another group in this subclass
    • B23P17/04—Metal-working operations, not covered by a single other subclass or another group in this subclass characterised by the nature of the material involved or the kind of product independently of its shape
    • B23P17/06—Making steel wool or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D25/00—Machines or arrangements for shearing stock while the latter is travelling otherwise than in the direction of the cut
    • B23D25/14—Machines or arrangements for shearing stock while the latter is travelling otherwise than in the direction of the cut without regard to the exact dimensions of the resulting material, e.g. for cutting-up scrap
    • 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
    • E04C5/012—Discrete reinforcing elements, e.g. fibres
    • 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 fiber for reinforcing castable curing materials according to the preamble of claim 1 and a method for producing such steel fibers.
  • the tensile strength of the composite material formed in this way should be increased in particular.
  • the introduction of wire- or rod-shaped monier iron is common in the processing of concrete.
  • the reinforcement material is also added in the form of relatively small fibers. These fibers have, for example, a length in the range from 20 to 60 mm and a thickness in the order of 0.5 to 2 mm.
  • Steel materials are usually used as materials for the fibers.
  • plastic fibers for example. Effective clamping of the fiber material in the matrix of the base material is essential for the quality of the composite material formed. Since the tensile strength of the composite is to be increased, it is critical that the resistance to pulling the fibers out of the
  • Matrix material is as high as possible.
  • Various forms of steel fibers are known from EP 0 098 825 B1, each of which can be produced from wire-shaped insert material. Such fibers are preferably given a shape deviating from the smooth cylindrical shape at their ends by kinking or upsetting the ends. These deformations can also occur over the whole Long of steel fibers run out of this
  • Writing is also known to have an approximately sinusoidally corrugated shape of a steel fiber
  • EP 0 130 191 B1 describes such a regularly corrugated steel fiber, which is obviously produced from a round wire, in more detail.
  • the material used is said to have a breaking stress within the
  • the fiber diameter should be a maximum of 1.2 mm. Depending on this fiber diameter d it is specified that the amplitude of the corrugation of the fiber longitudinal axis 1 to 1.5 d, the wavelength at least 7 d and at most 10 d for a fiber length in the range of 45 to 65 d
  • the object of this invention is to propose a novel steel fiber with a corrugated outer shape in accordance with the generic term, which ensures a particularly high resistance to being pulled out of the matrix material
  • the longitudinal edge areas in the fiber according to the invention are not sinusoidal or approximately circular waves, but are essentially composed as a polygon.
  • the steel fibers are not made of a wire
  • the two longitudinal edges of the steel fibers each have a corrugated, mutually congruent shape. It is an essential characteristic that between the two wavy cut edges (longitudinal edges), which are shifted parallel to each other by the width b, a continuous strip of material over the entire fiber length I.
  • the width d exists insofar the shape of the steel fiber can also be described as rectangular in the basic shape, with material edges being provided on each of the long edges. In the direction of the longitudinal axis, the material protrusions of one long edge are each offset from that of the other long edge, so that after On the outside, an overall wavy appearance results.
  • the material protrusions are preferably triangular (in particular, isosceles triangles), but they can also be trapezoidal, rectangular or polygonal in another way, for example.
  • the material protrusions are preferably arranged at regular intervals and are of equal size, but this is not mandatory required
  • the corrugated shape does not extend over the entire length of the fiber, but is limited to a central part, while the two ends run straight, that is to say without curling
  • the steel fiber in addition to the wave-like shape lying in the sheet metal plane of the preliminary material, also has a waviness transverse to the sheet plane. This results in particularly good anchoring of the steel fiber in the concrete matrix
  • FIG. 3 shows schematic representations of steel fibers with trapezoidal or rectangular corrugation
  • FIG. 5 shows a side view of an overall system for producing fibers according to the invention
  • FIG. 6 shows a side view of a shredding device
  • 7 shows a plan view of a strip of prematerial sheet metal and a shearing tool designed according to the invention
  • FIG. 8 shows a plan view of a strip of prematerial sheet metal and a shearing tool designed according to the invention in a rotated position relative to one another
  • 9 is a plan view of a wide strip of prematerial sheet metal and a
  • FIG. 13 is a side view of a cleavage device
  • FIG. 14 Sheet metal stacking table for the material feed and FIG. 14 a clogging device with sheet metal feed from above
  • the steel fiber shown schematically in FIG. 1 essentially has a corrugated shape, which is composed of isosceles triangles. Only the two end regions w of the steel fiber are straight. The two long edges of the steel fiber are congruent with one another and are geometrically defined by
  • the triangular material protrusions are arranged along the longitudinal axis, which give the steel fiber an overall triangular wave-like appearance.
  • the two straight ends w of the steel fiber expediently running parallel, in particular coaxially to the longitudinal axis, should have a length which is in the range from 3 to 20%, preferably 8 to 15% and particularly preferably approximately 10% of the fiber length 1, as shown in FIG 1 is indicated This ensures that the major part of the fiber length I has a corrugated shape. It is recommended that the straight ends of the fiber be parallel, especially coaxial to the long axis of the fiber This has advantages in the metering and admixing of the steel fibers to the matrix material used and in terms of avoiding stress peaks when the matrix material shrinks.
  • the width b between the two congruent, parallel, corrugated long edges expediently lies in the range from 0.3 to 2.5 mm
  • Corrugation is advantageously about 2 to 10 times the width b
  • the amplitude a of the corrugation (measured from the fiber longitudinal axis) must be smaller than the width b of the parallel displacement of the two long edges
  • the amplitude a is in the range of 0.6 to 0.9 times, in particular 0.7 to 0.8 times the width b
  • the width b of the parallel displacement between the long edges in relation to the amplitude a is expediently chosen that the width d of the remaining continuous material strip of the steel fiber is of an order of magnitude up to the thickness D of the sheet metal strip used for production.
  • the fiber length I expediently lies in the range from 25 to 65
  • the apex angle ⁇ of the triangular wave should be between 90 ° and 150 °, in particular between 110 ° and 135 ° in the region of the wave crests (triangular peaks) and
  • the waves can be designed with more rounded corners. This allows the formation of
  • FIG. 2 examples of three differently sized steel fibers are shown in realistic size, each of which is characterized by its triangular wave shape.
  • the two steel fibers shown schematically in FIG. 3 differ from one another in that their waves are not triangular but rather trapezoidal or rectangular in principle However, this also leads to a fiber that has a continuous rectangular material strip running in the area of its longitudinal axis, which is provided with material bulges on the long edges, which are designed as triangles, trapezoids or rectangles in accordance with the waveform and are securely anchored in the matrix material (e.g. concrete ) ensure that the steel fibers are not pulled out
  • a steel fiber, which ensures particularly good anchoring in the concrete is shown in three different views in FIG. 4.
  • FIG. 4a shows the steel fiber, which is triangular wave-shaped in its central part, in a plan view (onto the sheet metal plane of the primary material) Steel fiber shown in a view rotated by 90 °, i.e. looking in the narrow face of the
  • the steel fiber according to the invention is produced by punching out or, more generally, by shearing off corresponding corrugated material strips from a sheet-metal pre-material
  • the use of two interacting shearing tools can be produced from a sheet-like primary material.
  • the cutting edges of the two tools have a triangular wave contour in their central part, as corresponds to the representation in FIG. 1.
  • the desired fiber thickness is determined on the one hand by the thickness of the sheet metal used and on the other hand determined by the choice of the sheet metal feed set between two successive shear processes (width b of the parallel displacement)
  • the steel fibers produced fall out of the eccentric punch 3 below and pass over a slide 5 for packaging in a sack 6 In FIG. 6, such an eccentric punch 3 is shown in enlarged form in close proximity. Instead of a band-shaped sheet, a sheet 8 is used as the starting material.
  • the feed is again carried out by a pair of driving rollers 2
  • Generation of the steel fibers is not carried out with a single tool, but via two shear tools 9 connected in series, which in the sense of patrons with a corresponding pair of mat-shaped ones
  • a container 11 is provided here for packaging the steel fibers produced
  • FIGS. 7 to 9 The action of the shear tools 9 on the sheet-like primary material 7 can be seen very well in different forms in FIGS. 7 to 9.
  • FIGS. 7 to 9 The action of the shear tools 9 on the sheet-like primary material 7 can be seen very well in different forms in FIGS. 7 to 9.
  • Sheet steel strip 7 is used, the width of which corresponds exactly to the length of the steel fiber to be produced.
  • the direction of feed is indicated by the arrow shown.
  • the sheet metal strip 7 has been shown in FIG. 7 in a position retracted from the cutting edge of the shearing tool 9 against the feed direction.
  • the individual steel fibers are sheared off in a manner known per se in that the sheet metal strip 7 is pushed out by the width of the desired feed (width of the parallel displacement b) beyond the cutting edge of the fixed shearing tool and then the shearing tool 9 moved in a reversing lifting operation through the sheet plane is pressed down past the cutting edge of the stationary shearing tool, so that a narrow, corrugated sheet metal strip falls down out of the machine.
  • a linear stroke movement other forms of movement can also be used for the shearing process, as will be explained below.
  • FIG. 8 a slightly modified form of fiber production is indicated.
  • FIG. 10 Another form of a multiple tool is shown in two views in FIG. 10.
  • the tool carrier here is a flat plate 13 which is equipped with a large number of shearing tools 9, the cutting edge of which is radially aligned in each case.
  • two “radii” are distributed over the circumference Rows "of shear tools 9 attached to the faceplate 13 In their angular position, the two rows of tools are offset from one another. In principle, it would also be possible to dispense with such offset angular arrangements. However, in view of a uniform utilization of the machine's power, the embodiment shown is recommended.
  • the axis of rotation the face plate is perpendicular to the cutting edge of the respective shaving tools, which are guided in their cutting movement on a circular path
  • Cutting tools 9 act against a stationary second shear tool, not shown, which is designed as a cutter bar and extends in its length over the width of approximately two shear tools 9
  • Embodiment of Fig. 1 1 for use in which the individual shaving tools 9 also perform circular movements.
  • the shaving tools 9 are not arranged on a face plate, but on the lateral surface of a disk-shaped or roller-shaped carrier, which can be referred to as knife roller 14 Axis of rotation of the circularly moving
  • Shearing tools 9 are thus parallel to the longitudinal axis of the steel fibers to be sheared, that is to say to the longitudinal direction of the cutting edges
  • FIG. 12 A further version for the production of the steel fibers according to the invention is shown in FIG. 12.
  • a large number of cutting tools 9 arranged in a row next to one another and one behind the other are used, which carry out a circumferential movement
  • a fixed second shearing tool is used, which is indicated as a cutter bar 16.
  • This cutter bar should expediently be arranged at the height of the axis of rotation of one of the two pulleys 17 in order to avoid it the one that comes into engagement
  • FIG. 13 and 14 show further variants for a plant for the production of the steel fibers according to the invention as basic diagrams.
  • the shearing process is carried out in each case by an eccentric punch, as was already shown in FIGS. 6 and 5, respectively 13 is carried out in FIG. 13 by, for example, a pneumatically or hydraulically driven sheet-metal feed device 19.
  • the topmost sheet-metal sheet 8 is fed into a sheet-metal stacking lifting table 18, which can be moved, for example, hydraulically or by means of an electromotive-driven spindle In contrast to this, the sheet metal supply in the example of FIG. 14 takes place from above.
  • the insertion of the individual metal sheets 8 into the shredding device 1 is effected here by a driver of the sheet metal stack feed device 20, which can be moved in the feed direction by means of an electromotive driven feed screw 21 and also the feed between the shear-off strokes of the eccentric punch 3
  • the feed can be effected by the corresponding intermittent drive of the drive roller pair of the feed device 2.
  • the metal stack is in Long beams aligned feed direction rests and the height of the driver of the sheet metal sheet feed device 20 is set so that only the right edge of the lowermost sheet sheet 8 is grasped.
  • the sheet metal sheets above can be moved by one on the left side of the sheet metal tape-arranged retaining bar are retained so that only a slipping of the overlying metal sheets can take place after the bottom metal sheet 8 has been pushed out
  • a new type of steel fiber is made available, which shows very good results with regard to its pull-out behavior from the matrix material and which can be produced in an efficient and cost-effective manner with the method according to the invention.
  • the pull-out behavior can still be achieved in a special way by measures improve, which lead to a rough, adhesion-improving surface of the steel fibers.
  • measures which are carried out, for example, as pickling, phosphating or sandblasting or steel blasting, can either be done on the pre-material! or on the sheared steel fibers

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)

Abstract

L'invention concerne une fibre d'acier destinée à renforcer des matériaux coulables durcissables, notamment du béton, qui s'étend sensiblement le long d'un axe longitudinal et présente des arêtes longitudinales qui s'écartent de la forme rectiligne. Cette fibre se caractérise en ce qu'elle comprend de fines bandes de tôle d'épaisseur égale (épaisseur de tôle D), dont les arêtes longitudinales, vues en tant qu'arêtes de coupe dans le plan de la tôle, présentent chacune une forme congruente ondulée, sont décalées parallèlement les unes aux autres et sont réunies de manière à former sensiblement une suite de polygones. La largeur du décalage parallèle (b) est tel qu'il subsiste une bande de matériau (largeur d) rectangulaire continue dans le plan de la tôle, entre les arêtes longitudinales ondulées, sur toute la longueur (I) de la fibre. L'invention concerne une outre un procédé permettant de réaliser cette fibre d'acier.
PCT/DE1996/002379 1995-12-08 1996-12-09 Fibre d'acier et procede permettant de la produire WO1997021888A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU18694/97A AU1869497A (en) 1995-12-08 1996-12-09 Steel fibre and method of producing the same

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19547527 1995-12-08
DE19547527.5 1995-12-08
DE19627347.1 1996-07-01
DE19627347A DE19627347A1 (de) 1995-12-08 1996-07-01 Stahlfaser und Verfahren zur Herstellung von Stahlfasern

Publications (3)

Publication Number Publication Date
WO1997021888A2 true WO1997021888A2 (fr) 1997-06-19
WO1997021888A9 WO1997021888A9 (fr) 1997-07-31
WO1997021888A3 WO1997021888A3 (fr) 2001-04-12

Family

ID=26021435

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1996/002379 WO1997021888A2 (fr) 1995-12-08 1996-12-09 Fibre d'acier et procede permettant de la produire

Country Status (2)

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AU (1) AU1869497A (fr)
WO (1) WO1997021888A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120261861A1 (en) * 2010-06-28 2012-10-18 Bracegirdle P E Nano-Steel Reinforcing Fibers in Concrete, Asphalt and Plastic Compositions and the Associated Method of Fabrication
CN108581032A (zh) * 2018-06-15 2018-09-28 江苏赫夫特齿轮制造有限公司 三刀头回转飞剪机
CN114247768A (zh) * 2021-12-30 2022-03-29 重庆市庆港钢纤维有限公司 一种生产端钩型钢纤维的设备及方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2047315A (en) * 1979-04-10 1980-11-26 Bekaert Cockerill Nv Sa Steel wire element for reinforcing mortar or concrete
EP0529105A1 (fr) * 1991-07-16 1993-03-03 UAB Unternehmens-Anlage-Beratungsgesellschaft mbH Procédé de fabrication d'un élément d'armature pour béton

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5794403A (en) * 1980-11-04 1982-06-11 Shigeji Takeda Steel fiber for reinforcement of concrete and method and device for production thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2047315A (en) * 1979-04-10 1980-11-26 Bekaert Cockerill Nv Sa Steel wire element for reinforcing mortar or concrete
EP0529105A1 (fr) * 1991-07-16 1993-03-03 UAB Unternehmens-Anlage-Beratungsgesellschaft mbH Procédé de fabrication d'un élément d'armature pour béton

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 006, no. 187 (M-158), 25.September 1982 & JP 57 094403 A (TAKEDA SHIGEJI), 11.Juni 1982, *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120261861A1 (en) * 2010-06-28 2012-10-18 Bracegirdle P E Nano-Steel Reinforcing Fibers in Concrete, Asphalt and Plastic Compositions and the Associated Method of Fabrication
CN108581032A (zh) * 2018-06-15 2018-09-28 江苏赫夫特齿轮制造有限公司 三刀头回转飞剪机
CN114247768A (zh) * 2021-12-30 2022-03-29 重庆市庆港钢纤维有限公司 一种生产端钩型钢纤维的设备及方法
CN114247768B (zh) * 2021-12-30 2023-08-11 重庆市庆港钢纤维有限公司 一种生产端钩型钢纤维的设备及方法

Also Published As

Publication number Publication date
WO1997021888A3 (fr) 2001-04-12
AU1869497A (en) 1997-07-03

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