EP0314935B1 - Laminage à chaud de barres à nervures hélicoidales - Google Patents

Laminage à chaud de barres à nervures hélicoidales Download PDF

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Publication number
EP0314935B1
EP0314935B1 EP88116615A EP88116615A EP0314935B1 EP 0314935 B1 EP0314935 B1 EP 0314935B1 EP 88116615 A EP88116615 A EP 88116615A EP 88116615 A EP88116615 A EP 88116615A EP 0314935 B1 EP0314935 B1 EP 0314935B1
Authority
EP
European Patent Office
Prior art keywords
ribs
rod
rollers
produced
steel rod
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
EP88116615A
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German (de)
English (en)
Other versions
EP0314935A2 (fr
EP0314935A3 (en
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.)
Walter Bau AG
Original Assignee
Dyckerhoff and Widmann AG
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Filing date
Publication date
Application filed by Dyckerhoff and Widmann AG filed Critical Dyckerhoff and Widmann AG
Publication of EP0314935A2 publication Critical patent/EP0314935A2/fr
Publication of EP0314935A3 publication Critical patent/EP0314935A3/de
Application granted granted Critical
Publication of EP0314935B1 publication Critical patent/EP0314935B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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, i.e. of essentially one-dimensional [1D] or two-dimensional [2D] extent
    • E04C5/03—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance, i.e. of essentially one-dimensional [1D] or two-dimensional [2D] extent 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
    • B21B2275/00—Mill drive parameters
    • B21B2275/02—Speed
    • B21B2275/04—Roll speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
    • B21B35/02—Drives for metal-rolling mills, e.g. hydraulic drives for continuously-operating mills

Definitions

  • the invention relates to a method for producing a hot-rolled steel bar, in particular a concrete reinforcement bar, according to the preamble of patent claim 1.
  • steel bars are known as concrete reinforcement bars, in particular as tension bars, in which these ribs lie on two opposite sides of the bar circumference and each extend only over part of the bar circumference (DE-PS 17 84 630).
  • Such steel bars can be rolled in the course of a normal warm rolling process in the last roll pass by a pair of duo rolls if precautions are taken to be able to adjust one of the rolls by rotating about its axis relative to the other roll so that certain points of its circumference correspond to the corresponding one
  • the circumference of the opposing roller can be precisely assigned to one another in terms of position and if the rollers are driven at the same peripheral speed. In this way it can be achieved that the ribs produced on opposite sides of the steel rod lie on a continuous helix and thus form a screwable thread.
  • Such steel bars can be used both as concrete reinforcement bars if the shape and dimensions of the ribs with regard to the composite properties of the requirements correspond to a concrete rib steel, as well as prestressing rods for prestressed concrete, as anchor rods for ground and rock anchors, as formwork anchors or the like, because anchoring bodies can be screwed onto the partial thread formed by the ribs at any point.
  • anchoring or connecting bodies to be screwed on must have a greater length in order to transmit a certain rod force than would be the case with a rod with a continuous, uninterrupted thread.
  • a steel rod provided with a continuous thread is already known and is also provided for the reinforcement of concrete (DE-GM 1 905 704).
  • the thread is produced on conventional thread rolling machines; these are so-called transverse rolling mills made of two correspondingly profiled rolls that rotate in the same sense.
  • the steel rod is located between these rollers and rolls around their circumference, whereby in addition to the deformation, it undergoes an opposite rotational movement and a feed in the sense of screwing it forward.
  • this process is very time-consuming, it has the disadvantage that it cannot be carried out continuously, especially not immediately after hot rolling, because the steel rod has to perform a rotary movement in order to produce the thread.
  • the object of the invention is to create a possibility for producing a steel rod, in particular a concrete reinforcement rod, in a machining step immediately following the hot rolling process, the ribs of which have an uninterrupted screwable thread form.
  • a steel rod 1 produced according to the invention is shown in side view and in Fig. 2 in cross section along the line II-II in Fig. 1.
  • the steel rod 1 has an approximately circular core cross section and is provided on its surface with ribs 2 which form a continuous, uninterrupted thread over the entire length of the rod.
  • the ribs 2 have an approximately trapezoidal cross section with oblique flanks 3; however, any thread cross-sections are conceivable in an analogous manner.
  • the steel rod 1 is produced in a warm rolling process, expediently directly from the rolling heat, the last two roll stands of a rolling train forming a unit which is shown schematically in FIG. 3.
  • the rolling stand unit according to the invention consists of two with comparatively little clearance Distance, e.g. 0.30 m, arranged from each other duo-roller pairs A and B of two rollers I and II or III and IV, which are arranged pivoted by 90 degrees to the rod axis S (Fig. 3).
  • Both the rollers I and II, which act laterally on the rod 1 with vertical nip, and the rollers III and IV, which act on the rod 1 at the top and bottom with a horizontal nip, are provided with profiles 4 and 5, at least over part of their length, each of which has the negative correspond to the ribs 2 to be produced on the rod 1.
  • rollers I / II and III / IV of the roller pairs A and B are connected to one another in a movement-locking manner; this can happen, for example, in that the rollers I, II and III, IV are driven by a common gear unit acting on all rollers, as it were by a quattro gear, or also in that different drives are electronically connected to each other.
  • the rollers are driven synchronously to achieve the same peripheral speeds, ie with the same roller diameters at the same speed; the direction of rotation of the individual rollers is indicated by arrows 6 and 7, respectively. This ensures that a speed ratio that has been set remains constant, ie that when the speed of one pair of rollers changes, the speed of the other pair of rollers must change accordingly.
  • roller pair B downstream in the feed direction according to arrow 8 has, compared to the roller pair A, in addition to the advance caused by the elongation of the rod 1 in the roll stand A, a further small advance which is between the roller pairs A and B generates a tensile force in rod 1.
  • one of the rollers I or II or III or IV must be adjustable in the direction of rotation relative to the other roller in such a way that certain locations on the circumference of one of the rollers positionally correspond to the corresponding locations on the circumference of the other roller can be assigned. This adjustability is necessary in order to ensure that the partial regions of the threaded ribs 1 which are respectively produced by a pair of rollers lie on a continuous helical line.
  • a corresponding adjustability is required under the roller pairs A and B, namely in such a way that both rollers of one of the roller pairs, without changing their position relative to one another, can be adjusted relative to the other roller pair in such a way that the two partial regions of the thread ribs produced by these rollers open are located on the same helix as the partial areas generated by the two previous rollers.
  • This possibility is of course also given if, for example, one of the four rollers is fixed and the remaining three rollers are adjustable with respect to this one roller.
  • Fig. 4 shows a schematic side view again along a feed path in the direction of arrow 8, the two successive roller pairs A and B with the rollers I / II and III / IV.
  • the steel rod 1 Before the pair of rollers A, the steel rod 1 shows an approximately circular cross section 1 ', which is of course only indicated as an example. Between the pairs of rollers A and B, the steel rod 1 has an approximately oval cross section 1 ⁇ with ribs 2 'produced on two opposite sides by the profiles 4 of the rollers I / II. After passing through the roller pair B there are also the upper and lower rib regions 2 viteen generated by the profiles 5 of the rollers III / IV, as a result of which the steel rod 1 in the final state again has an essentially circular shape with continuous threaded ribs 2.
  • the spacing of the ribs in the individual machining stages must be exactly matched to one another and to the elongation of the rod occurring there due to the reduction in cross section.
  • the fin spacing b corresponds to that given by the Roll pair A produced rib spacing a plus the extension of the rod 1 as a result of the reduction in cross section achieved in this roll stand.
  • the rib spacing generated by the pair of rollers B must correspond to the rib spacing b; both are caused by the stretching occurring in this roll stand to the distance c forming the pitch s of the thread in the finished product.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Metal Rolling (AREA)
  • Reinforcement Elements For Buildings (AREA)

Claims (3)

  1. Procédé de fabrication d'une barre en acier (1) laminée à chaud, en particulier d'une barre d'armature à béton, à section transversale à peu près circulaire et avec des nervures hélicoïdales et au moins des parties de nervures (2) formant un filetage, en vue du vissage d'un corps d'ancrage ou de liaison, pourvu d'un taraudage correspondant, caractérisé en ce que, pour produire un filetage (2) continu, sans interruption, au cours du laminage à chaud, dans une première étape d'usinage, on produit sur deux côtés opposés de la barre en acier (1) des nervures (2'), s'étendant chaque fois seulement sur une zone partielle de la périphérie de la barre, la barre présentant une section transversale (1'') ovale, et en ce que, dans une deuxième étape d'usinage, effectuée immédiatement après, sont produites les nervures (2'') s'étendant sur les zones intermédiaires de la périphérie de la barre.
  2. Procédé selon la revendication 1, caractérisé en ce que les deux étapes d'usinage suivent immédiatement le laminage de la barre en acier, en utilisant la chaleur de laminage.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que l'espacement (a) entre les nervures (2') produites dans la première étape d'usinage est inférieur , de la valeur de l'extension de la barre en acier, à l'espacement (b) entre les nervures (2'') produites dans la deuxième étape de procédé, espacement à son tour inférieur, de la valeur de l'extension, à l'espacement (c) entre les nervures (2) à l'état final de la barre.
EP88116615A 1987-10-31 1988-10-07 Laminage à chaud de barres à nervures hélicoidales Expired - Lifetime EP0314935B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3736942 1987-10-31
DE19873736942 DE3736942A1 (de) 1987-10-31 1987-10-31 Verfahren zum herstellen eines stahlstabes mit warmgewalzten, schraubenlinienfoermig verlaufenden rippen und vorrichtung zum durchfuehren des verfahrens

Publications (3)

Publication Number Publication Date
EP0314935A2 EP0314935A2 (fr) 1989-05-10
EP0314935A3 EP0314935A3 (en) 1989-11-15
EP0314935B1 true EP0314935B1 (fr) 1993-03-31

Family

ID=6339490

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88116615A Expired - Lifetime EP0314935B1 (fr) 1987-10-31 1988-10-07 Laminage à chaud de barres à nervures hélicoidales

Country Status (7)

Country Link
US (1) US4953379A (fr)
EP (1) EP0314935B1 (fr)
JP (1) JPH01148433A (fr)
BR (1) BR8805594A (fr)
DE (2) DE3736942A1 (fr)
HU (1) HU204456B (fr)
ZA (1) ZA887697B (fr)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6298705B1 (en) 2000-01-26 2001-10-09 Morgan Construction Company Method and apparatus for rolling concrete reinforcing elements
AUPQ624600A0 (en) * 2000-03-15 2000-04-06 Gray, Evelyn Frances Process for forming a threaded member
US6935997B2 (en) * 2000-09-14 2005-08-30 Rutgers, The State University Of New Jersey Patterning technology for folded sheet structures
EP1219366A3 (fr) * 2000-12-27 2003-11-19 Christian Hoffmann Procédé de fabrication d' un profile, notamment d' une filetage, aux barres en acier et installation et dispositif correspondantes
US7624556B2 (en) 2003-11-25 2009-12-01 Bbv Vorspanntechnik Gmbh Threaded deformed reinforcing bar and method for making the bar
CA2802913C (fr) * 2010-06-24 2019-09-10 Nucor Corporation Boulon d'armature filete pouvant resister a la tension
US9010165B2 (en) 2011-01-18 2015-04-21 Nucor Corporation Threaded rebar manufacturing process and system
CN102179403B (zh) * 2011-03-23 2012-12-05 中冶赛迪工程技术股份有限公司 高强度细晶粒热轧带肋钢筋生产设备及其生产工艺
ITMI20110937A1 (it) * 2011-05-25 2012-11-26 Siemens Vai Metals Tech Srl Gabbia ed impianto di laminazione
JP5925548B2 (ja) * 2011-07-19 2016-05-25 濱中ナット株式会社 ねじ節鉄筋の製造方法
CN102814322B (zh) * 2012-07-18 2015-11-25 重庆亨尔通冶金新技术股份有限公司 一种钢筋加工的粗轧机
CN106269853A (zh) * 2016-08-16 2017-01-04 重庆市晟庄建材有限责任公司 一种高延性冷轧带肋钢筋加工方法
CN109563706B (zh) 2016-10-13 2022-01-04 福田章 异形钢筋的螺纹式钢筋接头构造及其制造方法
JP6147404B1 (ja) * 2016-10-13 2017-06-14 福田 清子 異形鉄筋のねじ式鉄筋継手およびその製造方法
CN108176713A (zh) * 2017-12-08 2018-06-19 山东钢铁股份有限公司 一种热轧花纹h型钢、轧制方法和轧制设备
US10260234B1 (en) * 2017-12-22 2019-04-16 Yu-Liang Kuo Deformed reinforcing bar, truss structure, and floor module structure
US20220098099A1 (en) * 2019-01-10 2022-03-31 The Regents Of The University Of Michigan Striated fiber-based concrete reinforcement
JP6682122B1 (ja) * 2019-08-01 2020-04-15 山田 榮子 連続ねじを持つ棒鋼の製造方法
CN112588820B (zh) * 2020-12-25 2022-10-28 首钢长治钢铁有限公司 一种热轧矿用锚杆钢生产方法
BE1029201B1 (nl) * 2021-03-16 2022-10-17 Dubaere Walsrol, walsmachine en werkwijze voor het koudwalsen van walsdraad tot koud getrokken draad met een profiel
CN113458141B (zh) * 2021-07-15 2022-05-27 首钢长治钢铁有限公司 一种精轧螺纹钢轧制方法
CN114054526A (zh) * 2021-11-10 2022-02-18 陕西鼎益科技有限公司 一种高温合金盘圆丝材的mcr挤压成型装置

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JPS62258040A (ja) * 1986-05-02 1987-11-10 住友電気工業株式会社 コンクリ−ト構造物用棒鋼

Also Published As

Publication number Publication date
BR8805594A (pt) 1989-06-20
HUT51516A (en) 1990-05-28
DE3879869D1 (de) 1993-05-06
JPH01148433A (ja) 1989-06-09
EP0314935A2 (fr) 1989-05-10
ZA887697B (en) 1989-06-28
EP0314935A3 (en) 1989-11-15
HU204456B (en) 1992-01-28
DE3736942A1 (de) 1989-05-11
US4953379A (en) 1990-09-04

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