WO1994025701A1 - Element de renforcement tridimensionnel en fil metallique et ses procedes et dispositifs de fabrication - Google Patents

Element de renforcement tridimensionnel en fil metallique et ses procedes et dispositifs de fabrication Download PDF

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Publication number
WO1994025701A1
WO1994025701A1 PCT/SE1993/000392 SE9300392W WO9425701A1 WO 1994025701 A1 WO1994025701 A1 WO 1994025701A1 SE 9300392 W SE9300392 W SE 9300392W WO 9425701 A1 WO9425701 A1 WO 9425701A1
Authority
WO
WIPO (PCT)
Prior art keywords
wire
ring
bending
rings
wire ring
Prior art date
Application number
PCT/SE1993/000392
Other languages
English (en)
Inventor
Björn Svedberg
Original Assignee
Svedberg Bjoern
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 Svedberg Bjoern filed Critical Svedberg Bjoern
Priority to AU40312/93A priority Critical patent/AU4031293A/en
Priority to PCT/SE1993/000392 priority patent/WO1994025701A1/fr
Publication of WO1994025701A1 publication Critical patent/WO1994025701A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F27/00—Making wire network, i.e. wire nets
    • B21F27/12—Making special types or portions of network by methods or means specially adapted therefor
    • B21F27/20—Making special types or portions of network by methods or means specially adapted therefor of plaster-carrying network
    • 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

Definitions

  • the present invention relates to firstly, a reinforcing 5 . element of the type described in the preamble to patent claim 1, and secondly a process and a device (machine) for manufac ⁇ ture of such reinforcing elements, as according to the pream ⁇ ble to claim 5 or 7 and claim 8.
  • a reinforcing element of this type is intended to be placed in a casting mold together with concrete and consists of wire. It comprises at least three wire rings forming angles with each other, each wire ring being in contact with and/or joined to wire ring at at least two points of intersection. 5
  • Concrete is a very frequently used construction material.
  • various types of concrete can be mentioned water ⁇ proof concrete, floating concrete and light weight concrete.
  • Concrete materials also sometimes include asphalt concrete. Since the tensile strength for unreinforced concrete only amounts to about 10% of its compression strength, reinfor ⁇ cement is usually placed in the concrete.
  • the reinforcement can consist of rods, wires, bars, nets, lines, cables and the 5 like, usually of steel. Fibres of metal or organic material can also be used as reinforcement in fibre reinforced con ⁇ crete.
  • the tensile strength of a concrete construction which can thus be increased appreciably with the aid of conventional reinforcement, can also be increased by distributing a number of small metal elements in the concrete mass.
  • metal elements in the form of steel wires for example have, howe ⁇ ver, the disadvantage that they must be long (i.e. have a length which is about 100 times the wire diameter) to provide the required adhesion in the concrete. If one uses metal elements provided with hooks at the ends, the elements can be made shorter, but they risk hooking into each other forming clusters, making them difficult to handle. Regardless whether such elongated elements have end hooks or not, it is, how ⁇ ever, difficult to distribute them evenly in the concrete mass. Even distribution of metal elements is, however, a precondition for fulfilling their function and providing effective reinforcing effects.
  • the known wire ball reinforcing element has, however, not come into widespread use since it has proved to have a number of serious disadvantages, on the one hand, as regards manu ⁇ facturing and costs, and on the other hand, as regards rein ⁇ forcement and strength.
  • Reinforcing elements which are to be used in great numbers must of course be able to be mass produced in an efficient and cost effective manner. This is, however, not possible with the known "reinforcing ball” consisting of three separa- tely produced endless wire rings, which in a subsequent step are welded together to form a reinforcing ball.
  • the properties as regards reinforcement and strength of the welded reinforcing ball makes it in many cases more or less unusable as a reinforcing element.
  • the welded ball cannot be used since it rusts as a whole if it is made of a weldable steel, and rusts at the welds if it is made of cold drawn steel.
  • a welded ball (such as a ball of carbon steel) cannot be allowed to lie in the surface layer of a concrete cast since it rusts. In order to avoid rust it must be provided with a covering concrete layer. Welded wire balls can also not be used if there is a risk that they will end up against the mold wall, i.e. in the surface layer of the casting. All 0 weldable steel is in this context unsuitable since it rusts.
  • reinforcing wire with a substantially higher yield stress limit than 500 mPa to provide a reasonable reinforcement content when using balls.
  • the purpose of the invention is to provide a reinforcing element in the form of a non-welded reinforcing ball of continuous wire material.
  • This wire reinforcing ball shall also be simple and inexpensive to manufacture, i.e. the manufacture must be able to be done by means of a simple process which is well suited for carrying out in a simple machine or device, which can be made as a compact structure.
  • the wire rings constitute portions of a single coherent continuous metal wire, bent to the shapes of the rings, and in that the wire rings formed of said single metal wire are essentially circular-annular and have at least approximately the same diameter, whereby the outer contours of the wire rings of the element provide the element with a spherical outer contour.
  • Each wire ring is preferably disposed in a separate plane, said wire ring planes being essentially normal to each other.
  • At least one of the wire rings has a circumferential area where the wire is doubled, said double wire area having an 5 . arc extent approximately corresponding to one fourth of the wire ring winding.
  • At least one, and preferably both, of the free end portions of the continuous metal wire forming the wire rings of the 0 reinforcing element is/are bent in towards the centre of the reinforcement element. This provides effective engagement between the wire material and the concrete mass in the inner space of the reinforcing ball. This also minimizes the risk of adjacent reinforcing balls becoming entangled in each 5 other by means of the free ends portions of the wires.
  • the reinforcing ball of continuous wire presents no problems lying at the surface of the cas ⁇ ting (or against a form wall) and thus do not require a 0 separate covering layer of concrete, and can thus be placed directly in the form.
  • the reinforcing ball made of a continuous wire also has the great advantage that the tensile forces transmitted by the ball reinforcement are distributed over the entire reinfor ⁇ cing ball.
  • the technical reinforcing effect i.e. the capacity to trans ⁇ mit tensile forces in a reinforced concrete structure
  • a reinforcing ball consisting of separate, endless rings welded together.
  • a "ball-shaped" reinforcing element of the above mentioned type can be manufactured according to the invention by means of a process the characteristic steps of which are as fol ⁇ lows:
  • a single, continuous length of metal wire is used to form the reinforcing element, whereby: a) a first portion of the metal wire length is shaped by bending into a first wire ring, whereafter the wire is bent approximately 90° at the end of the first wire and, b) a subsequent second portion of the length of metal wire is shaped by bending into a second wire ring disposed in a plane essentially perpendicular to the plane of the first wire ring, the bending and shaping of the wire continuing however, approximately one fourth of a wire ring winding after comple ⁇ tion of the second wire ring so that the wire is doubled in the overlapping area of the second wire ring, whereupon the wire is bent approximately 90° at the end of the overlapping area, and c) a final third portion of the metal wire length is shaped by bending into a
  • a preferred embodiment of the reinforcing element can also be manufactured by taking the steps disclosed in claim 6.
  • a process for manufacturing the reinforcing element according to the invention can also, as an alternative, be defined as stated in claim 7.
  • the invention also relates to a device for manufacturing a wire reinforcing element of the above mentioned type.
  • This device according to the preamble of claim 8, has the special features disclosed in the characterizing clause of claim 8.
  • Claims 9 and 10 disclose additional further developing featu ⁇ res of the device.
  • the metal wire is advanced with the aid of driving and guiding wheels which advance the wire to a wire bending unit which imparts a retained bend to the passing wire.
  • a wire ball forming hou ⁇ sing is arranged downstream in the wire advancing path with an interior, at least essentially cylindrical, wire bending space with an inner diameter approximately twice the radius of the curvature of the retained wire bend achieved by the wire bending unit.
  • In the wall of the ball forming housing there is a wire feed-in opening through which opening the bent wire from the bending unit can pass over the lateral surface of a bending roller reciprocately moveable in the longitudinal direction of the cylindrical bending space.
  • the movement of said roller, transverse to the wire coming from the feed-in opening is capable of bending the wire approxima- tely 90°.
  • a wire cutting unit Upstream of the wire feed-in opening there is also arranged a wire cutting unit through which the wire passes.
  • This wire cutting unit serves to cut off the metal wire coming from the wire magazine when the wire length required for a complete reinforcing ball has passed the cutting unit.
  • This cutting unit can be disposed with the wire bending unit, but can also be placed in the wire advancing path between the driving and guiding wheels which feed the wire to the wire bending unit.
  • Fig. 1 is a perspective view of the reinforcing element (a reinforcing wire ball) according to the invention
  • Fig. 2 shows schematically a device according to the inven ⁇ tion suitable for manufacture of a reinforcing wire ball
  • Fig. 3 shows very schematically the essential components of a second embodiment of the device according to the invention
  • Fig. 4 shows an end view from above of the device according to Fig. 3.
  • Fig. 1 shows a preferred embodiment of a ball-like reinfor ⁇ cing element according to the invention.
  • the reinforcing consists of metal wire and comprises three continuous wire windings A, B and C. These wire ring windings or wire rings A, B, C are located in individual planes essentially perpen ⁇ dicular to each other.
  • the three wire rings A, B and C each stand in contact with the two other wire rings at at least two junctions.
  • Particularly characteristic of the reinforcing element according to the invention is that the three wire rings A, B, C constitute coherent parts of a single conti ⁇ nuous length 1 of metal wire, which according to the Figure extends from the free end portion A' to the other free end portion C at the opposite end of the continuous wire.
  • the wire rings A, B and C are thus different portions or sections of a single continuous length of metal wire.
  • the three wire rings A, B, C are essentially circular rings of approximately the same diameter.
  • the reinforcing element thus is given a "ball-like" appearance and therefore the reinforcing element in this description is also called a reinforcing wire ball or a reinforcing ball. Since the first wire ring A is circum ⁇ scribed by the second wire ring B which is in turn circum ⁇ scribed by the third wire ring C, the wire rings have of course slightly different diameters.
  • one of the wire rings namely ring B
  • This double wire portion 2 has an arc length which corresponds approximately to one fourth of a wire ring win ⁇ ding.
  • the two free end portions A' and C of the continuous metal wire, which form the three wire rings A, B and C are bent towards the interior of the reinforcing ball, so that the outermost ends are directed approximately towards the centre of the reinforcing ball.
  • the reinforcing ball shown in Fig. 1 is manufactured in the following manner:
  • a single continuous length 1 of metal wire is used in the manufacture of the reinforcing element.
  • a first portion of the metal wire length 1 is formed by bending in a first plane into a first wire ring A, whereafter the wire is bent appro ⁇ ximately 90° at the end 3 of the first wire ring A.
  • a subsequent second portion of the metal wire length 1 is formed by bending in a second plane into a second wire ring B, the plane of which is thus disposed essentially perpendi ⁇ cular to the plane of the first wire ring A.
  • the bending and forming of the wire 1 in this second plane is, however, continued approximately a fourth of a wire ring winding after the completion of the second wire ring B, so that the wire 1 will be doubled within this parallel wire area 2 of the second wire ring B.
  • the wire 1 is then bent approximately 90° at the end 4 of the parallel wire area 2, and a final third portion of the metal wire length 1 is formed by bending in a third plane into a third wire ring C, the plane of which will then be substantially perpendicular to the planes of both the first and the second wire rings (A and B) .
  • a continuous, straight metal wire 1 is supplied to the device 10 from a wire magazine (not shown) , such as a reel of wire. From this wire magazine, the wire 1 is fed by driving and guiding wheels 12 and 14 respectively towards a tubular wire ball forming housing 16 with an interior, at least essential ⁇ ly cylindrical, wire bending space.
  • the forming housing 16 has been provided with a "window" 18 which, however, will not be found in the actual device 10.
  • the lateral wall 20 of the tubular wire ball forming housing 16 there is a flat wall portion 22 in the form of a radial extension. This flat wall portion 22 is provided with a wire feed-in opening 24, through which the wire 1 can be fed into the interior of the wire ball forming housing 16.
  • a wire bending unit 26 which imparts a retained bend in the passing wire having a radius of curvature approximately corresponding to one half of the inner diameter of the wire bending space of the forming housing 16.
  • a pair of cooperating 5 Near the wire feed-in opening 24 there are dis ⁇ posed next to the flat wall portion 22 a pair of cooperating 5.
  • the wire 1 can without difficulty during continued feeding into the housing 16 form a ring along the inside of the 5 lateral wall 20 of the housing.
  • a first such wire ring (which is to form the first wire ring A of the reinforcing ball shown in Fig. 1) has been completed inside the forming housing 16, the vertically movable bending roller 32 makes a vertical bending stroke 1 upwards (see the arrow F in Fig. 2) 0 so that the finished first ring A is bent about 90° to the incoming wire 1 from the drive nip between the rollers 28 and 30.
  • the bending roller 32 In order for the bending roller 32 to be able to execute said bending stroke, it is journalled on a shaft (not shown) which is movable in a plane parallel to the flat wall portion 5 22 and extending out through the lateral wall 20 through a vertical slot 34 in the lateral wall.
  • the bending roller 32 returns thereafter and the feeding of the wire 1 into the wire ball forming housing 16 is continued until a second wire ring (such as wire ring B in Fig. 1) , comprising one and a 0 quarter winding, is formed inside the wire bending space in the housing 16.
  • a second wire ring such as wire ring B in Fig. 1
  • the bending roller 32 By means of the bending roller 32 there is then made at the end 4 of the parallel wire area 2 of the second wire ring B a new 90° bend in the wire so that the second wire ring will be vertically oriented in the housing 16.
  • the feed-in of the wire into the housing continues as the third wire ring (for example the wire ring C in Fig. 1) is formed inside the forming housing 16.
  • a wire cutting unit 36 is arranged upstream of the wire feed-in opening 24. The wire thus passes through this wire cutting unit before the wire continues in through 5 . the feed-in opening 24.
  • the device shown in Figs. 3 and 4 agrees in principle in all essential respects with that shown in Fig. 2 except that 0 there are no wire driving rollers 28 and 30 on the inside of the flat wall portion 22 near the wire feed-in opening 24.
  • the bending roller 32 is in this case instead arranged adja ⁇ cent the inside of the wall portion 22.
  • the 90° bending of the fed-in wire 1 is accomplished in this case with the aid 5 of the bending rollers 32 and against the edge of the feed-in opening 24 instead of against the nip between the rollers 28, 30 as shown in Fig. 2.
  • the wire cut-off unit 32 is in this case integrated in the wire bending unit 26, which is in turn mounted directly on the outside of the flat wall portion 22.
  • Fig. 4 This placing of the bending unit 26 is best shown in Fig. 4, which also shows how the bending roller 32 is journalled on a shaft 38 extending through the lateral wall 20.
  • the driving and guiding wheels 12, 14 respectively in this embodiment of the device can correspond to the driving and guiding wheels in Fig. 2.
  • Fig. 3 shows the situation where a first wire ring has just been made in the wire bending space of the ball forming housing 16.

Abstract

Elément de renforcement destiné à être placé dans un coffrage avec du béton, et comprenant trois anneaux en fil métallique (A, B, C) orientés en angle les uns par rapport aux autres. Chaque anneau est en contact avec un autre anneau au niveau d'au moins deux points de jonction, les anneaux constituant des parties d'un fil métallique unique continu (1) plié sous forme d'anneaux. Les anneaux (A, B, C) formés à partir de ce fil métallique unique (1) sont circulaires et présentent, tout au moins approximativement, le même diamètre. Un tel élément d'armature peut être fabriqué comme suit: une première partie de la longueur de fil métallique unique et continu (1) est pliée en un premier plan de sorte qu'un premier anneau métallique (A) est formé, comprenant au moins un enroulement en anneau complet, après quoi une seconde partie de la longueur du fil métallique (1) est pliée en un second plan perpendiculaire au premier de sorte qu'un second anneau (B) est formé, comprenant un enroulement entier et un quart supplémentaire d'enroulement. Une troisième partie finale de la longueur de fil (1) est alors pliée en un troisième plan perpendiculaire à ceux du premier et du second anneau de sorte qu'un troisième anneau (C) est formé, comprenant au moins un enroulement de fil complet. Le procédé peut être mis en application par l'intermédiaire d'un dispositif comprenant des roues d'entraînement et de guidage qui amènent le fil (1) à un organe de pliage de fil, lequel confère au fil qui le traverse un profil plié retenu avant que celui-ci ne soit amené vers un logement de formage de boule de fil métallique dans lequel est placé un rouleau de pliage mobile servant à plier un anneau formé à 90° par rapport au fil pénétrant dans le logement de formage. Un organe de coupe de fil métallique est également compris dans le dispositif.
PCT/SE1993/000392 1993-05-05 1993-05-05 Element de renforcement tridimensionnel en fil metallique et ses procedes et dispositifs de fabrication WO1994025701A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU40312/93A AU4031293A (en) 1993-05-05 1993-05-05 Three-dimensional reinforcing element of metal wire, and a method and means for manufacturing such element
PCT/SE1993/000392 WO1994025701A1 (fr) 1993-05-05 1993-05-05 Element de renforcement tridimensionnel en fil metallique et ses procedes et dispositifs de fabrication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SE1993/000392 WO1994025701A1 (fr) 1993-05-05 1993-05-05 Element de renforcement tridimensionnel en fil metallique et ses procedes et dispositifs de fabrication

Publications (1)

Publication Number Publication Date
WO1994025701A1 true WO1994025701A1 (fr) 1994-11-10

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AU (1) AU4031293A (fr)
WO (1) WO1994025701A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11274447B2 (en) * 2020-02-18 2022-03-15 Hawkeyepedershaab Concrete Technologies, Inc Lift hole forming device for concrete products

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2218559A (en) * 1936-05-06 1940-10-22 Elastic Knitted Wire Co Inc Method of and means for knitting preformed wire
US3616589A (en) * 1968-10-31 1971-11-02 James L Sherard Fiber reinforced concrete
US3913295A (en) * 1969-07-03 1975-10-21 Edward W Thompson Method and means for reinforcing cementatory matter
FR2460376A1 (fr) * 1979-06-28 1981-01-23 Bernard Daniel Elements d'armature complexes pour renforcer des conglomerats
US4335758A (en) * 1979-06-11 1982-06-22 George Koch Sons, Inc. Apparatus for advancing and forming a wire
US4823576A (en) * 1986-10-20 1989-04-25 Toyoda Gosei Co., Ltd. Apparatus for manufacturing ring-shaped member from elongate workpiece

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2218559A (en) * 1936-05-06 1940-10-22 Elastic Knitted Wire Co Inc Method of and means for knitting preformed wire
US3616589A (en) * 1968-10-31 1971-11-02 James L Sherard Fiber reinforced concrete
US3913295A (en) * 1969-07-03 1975-10-21 Edward W Thompson Method and means for reinforcing cementatory matter
US4335758A (en) * 1979-06-11 1982-06-22 George Koch Sons, Inc. Apparatus for advancing and forming a wire
FR2460376A1 (fr) * 1979-06-28 1981-01-23 Bernard Daniel Elements d'armature complexes pour renforcer des conglomerats
US4823576A (en) * 1986-10-20 1989-04-25 Toyoda Gosei Co., Ltd. Apparatus for manufacturing ring-shaped member from elongate workpiece

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11274447B2 (en) * 2020-02-18 2022-03-15 Hawkeyepedershaab Concrete Technologies, Inc Lift hole forming device for concrete products

Also Published As

Publication number Publication date
AU4031293A (en) 1994-11-21

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