EP0132249A2 - Verfahren und Vorrichtung zur Herstellung von Betonbewehrungsstäben auf einer Hochgeschwindigkeitsdrahtstrasse - Google Patents

Verfahren und Vorrichtung zur Herstellung von Betonbewehrungsstäben auf einer Hochgeschwindigkeitsdrahtstrasse Download PDF

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Publication number
EP0132249A2
EP0132249A2 EP84870100A EP84870100A EP0132249A2 EP 0132249 A2 EP0132249 A2 EP 0132249A2 EP 84870100 A EP84870100 A EP 84870100A EP 84870100 A EP84870100 A EP 84870100A EP 0132249 A2 EP0132249 A2 EP 0132249A2
Authority
EP
European Patent Office
Prior art keywords
wire
cooling
block
product
cooling device
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
EP84870100A
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English (en)
French (fr)
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EP0132249A3 (en
EP0132249B1 (de
Inventor
Marios Economopoulos
Pierre Simon
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.)
Centre de Recherches Metallurgiques CRM ASBL
Original Assignee
Centre de Recherches Metallurgiques CRM ASBL
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Publication date
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Application filed by Centre de Recherches Metallurgiques CRM ASBL filed Critical Centre de Recherches Metallurgiques CRM ASBL
Priority to AT84870100T priority Critical patent/ATE62837T1/de
Publication of EP0132249A2 publication Critical patent/EP0132249A2/de
Publication of EP0132249A3 publication Critical patent/EP0132249A3/fr
Application granted granted Critical
Publication of EP0132249B1 publication Critical patent/EP0132249B1/de
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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
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/14—Twisting
    • B21D11/15—Reinforcing rods for concrete
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0224—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for wire, rods, rounds, bars
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/006—Pinch roll sets

Definitions

  • the subject of the present invention is a method and devices for the manufacture, on a high-speed wire train, of steel concrete reinforcements, having both a high yield strength and a high ductility, as well as, if one desired, good weldability; this manufacturing is carried out by means of an abrupt cooling treatment applied during or immediately after rolling.
  • the first consists in incorporating microalloy elements into the steel; such as niobium or vanadium. This technique is however expensive, because of the price of the alloying elements.
  • the second means is to increase the elastic limit of the steel, by a cold deformation operation, in particular by torsion, of the bar.
  • the gain in elasticity limit is achieved at the expense of the elongation.
  • the process of the present invention takes place among the recent technique consisting in applying to hot-rolled concrete reinforcements, during or immediately after rolling, a sudden cooling, limited in time, so as to produce in the bar a surface layer of martensite; this "quenching" is sulvier from cooling during from which the core of the bar, that is to say the part not affected by the sudden cooling, is transformed into ferrite and carbides.
  • a sudden cooling limited in time, so as to produce in the bar a surface layer of martensite; this "quenching" is sulvier from cooling during from which the core of the bar, that is to say the part not affected by the sudden cooling, is transformed into ferrite and carbides.
  • Such judicious limitation of the duration of the abrupt cooling can be ensured by targeting a determined temperature at the core, at the end of the abrupt cooling phase; practically, the conduct of such an operation can be ensured by observing the temperature of the surface at the location of the bar where there is a heating due to the contribution of calories from the heart.
  • the trainer is normally capable of exerting a traction of value T, but for the rolling operation to take place correctly, the traction X exerted in the wire downstream of the finishing block must be greater than a minimum value , suitable for driving the wire out of the block.
  • the traction X at the outlet of the block, is in reality the difference between the traction force T of the driver and the braking force F applied to the wire mainly during the passage of the latter in the cooling device.
  • the experiments carried out have made it possible to establish that the braking force F was a function K of the length L of the cooling device, the coefficient K being itself a function of the nature of the cooling device, of the fluid flow and the relative speed of the wire relative to the coolant.
  • the subject of the present invention is an improved installation making it possible to apply to the traveling wire at 'high speed the quenching / self-tempering treatment capable of providing it with a combination, considered to be optimal, of elastic limit and elongation.
  • a first object of the present invention consists in applying to the product, upstream of the finishing block and / or at the level of this block, cooling intended to bring the temperature of the wire at the outlet of the block below what it is normally, that is to say when applying cooling at the block level only to obtain, for example, a substantially constant temperature in the block.
  • This additional cooling treatment, upstream or at the level of the block, has the result of increasing the stiffness of the wire at the outlet of the block, therefore reducing the minimum traction necessary for the smooth running of the operation; in addition, the minimum length of the cooling ramp necessary for quenching will be shortened, which will decrease the value of the braking force F.
  • a second object of the present invention consists in using a cooling device with a low braking coefficient K.
  • the cooling fluid consists of a water / air mixture which is more compressible and therefore less braking than the water usually used; under these conditions, if the coefficient K actually decreases, the length L necessary for the quenching operation must however be increased, since the specific power of the cooling is lowered; it was however observed that the product K x L, that is to say the braking force, was ultimately lower.
  • cooling devices are used provided with helical injection slots, of a type for example described elsewhere in Belgian patent n ° 867.299.
  • a third object of the present invention consists in increasing the traction force T developed by the trainer.
  • the power available in the trainer is increased; according to a second modality, which can be associated with the first, several pairs of drive rollers are used, possibly offset with respect to each other from the point of view of their level, which obliges the thread to be traversed in the leader a wavy trajectory.
  • FIG. 1 the elements which constitute the usual installation for the end of rolling are shown in solid lines: in the direction of flow of the wire, the intermediate train is encountered in 1, in 2, the finishing block, in 3, the intense cooling device or "quenching gun", and in 4, the roller drive; between the finisher 2 and the barrel 3, the traction X on the wire is equal to the difference between the force T exerted by the driver 4 and the braking F undergone by the wire mainly in the barrel 3.
  • FIG. 1 are shown in dashed lines two of the improvements which are the subject of the invention: in 6 there is shown a device for cooling the wire at the entrance to the finisher block while additional drive rollers are arranged at 7.
  • Figure II is a longitudinal section of an intense water-air cooling device which offers the characteristic of low internal braking, due to the compressibility of the fluid which circulates in this device.
  • 8 are distinguished air blowing channels in the annular slot 9 for injection inside the barrel 10; the water-air mixture is injected in the direction of flow of the wire.
  • this device is equipped with means for adjusting its cooling power, for example to modify the ratio between the water and air flow rates, or even the temperature of the water.
  • the method according to the invention can be used to manufacture reinforcements both smooth and crenellated, participating actively or passively in the strength of the concrete structure, possibly used in truss assemblies.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Heat Treatment Of Steel (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Wire Processing (AREA)
EP84870100A 1983-07-18 1984-07-10 Verfahren und Vorrichtung zur Herstellung von Betonbewehrungsstäben auf einer Hochgeschwindigkeitsdrahtstrasse Expired - Lifetime EP0132249B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84870100T ATE62837T1 (de) 1983-07-18 1984-07-10 Verfahren und vorrichtung zur herstellung von betonbewehrungsstaeben auf einer hochgeschwindigkeitsdrahtstrasse.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU84922A LU84922A1 (fr) 1983-07-18 1983-07-18 Procede et dispositifs de fabrication d'armatures a beton en acier sur train a fil a grande vitesse
LU84922 1983-07-18

Publications (3)

Publication Number Publication Date
EP0132249A2 true EP0132249A2 (de) 1985-01-23
EP0132249A3 EP0132249A3 (en) 1987-10-14
EP0132249B1 EP0132249B1 (de) 1991-04-24

Family

ID=19730123

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84870100A Expired - Lifetime EP0132249B1 (de) 1983-07-18 1984-07-10 Verfahren und Vorrichtung zur Herstellung von Betonbewehrungsstäben auf einer Hochgeschwindigkeitsdrahtstrasse

Country Status (12)

Country Link
US (1) US4625532A (de)
EP (1) EP0132249B1 (de)
JP (1) JPS60155623A (de)
KR (1) KR920000232B1 (de)
AT (1) ATE62837T1 (de)
AU (1) AU580960B2 (de)
CA (1) CA1245080A (de)
DE (1) DE3484488D1 (de)
ES (1) ES8505726A1 (de)
GB (1) GB2143452B (de)
LU (1) LU84922A1 (de)
ZA (1) ZA845522B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0312843A1 (de) * 1987-10-22 1989-04-26 Sms Schloemann-Siemag Aktiengesellschaft Verfahren zur Wärmeübertragung und dessen Anwendung zum temperaturkontrollierten Kühlen von Walzgut

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3518925A1 (de) * 1985-05-25 1986-11-27 Kocks Technik Gmbh & Co, 4010 Hilden Verfahren zum kontrollierten stab- und drahtwalzen legierter staehle
IT1235119B (it) * 1989-07-10 1992-06-18 Danieli Off Mecc Gabbia di laminazione con rulli a sbalzo multipli per laminazione veloce.
IT1235120B (it) * 1989-07-10 1992-06-18 Danieli Off Mecc Procedimento di laminazione veloce e sistema per la laminazione veloce.
DE4207296A1 (de) * 1992-03-07 1993-09-09 Schloemann Siemag Ag Feinstahl/drahtstrasse

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2756169A (en) * 1950-10-19 1956-07-24 John A Roebling S Sons Corp Method of heat treating hot rolled steel rods
DE1527625C3 (de) * 1966-04-29 1978-06-01 Demag Ag, 4100 Duisburg Walzwerksanlage für die Herstellung von Draht
GB1226416A (de) * 1968-07-10 1971-03-31
DE2102800B2 (de) * 1971-01-21 1973-04-05 Ukrain'skij gosudarstwennij institut po projektirowaniju metallurgitscheskich sawodow UKRGIPROMES, Dnepropetrowsk (Sowjetunion) Anlage zur thermischen behandlung von walzerzeugnissen im kuehlmittelstrom
JPS5110917B2 (de) * 1972-06-16 1976-04-07
AR206397A1 (es) * 1973-02-22 1976-07-23 Hudswell Morrice Ltd Aparato para hacer una zanja en el suelo
CA1028535A (en) * 1973-11-15 1978-03-28 Bethlehem Steel Corporation Method for controlling the temperature of steel during hot-rolling on a continuous hot-rolling mill
DE2437684C2 (de) * 1974-08-05 1982-09-02 SMS Schloemann-Siemag AG, 4000 Düsseldorf Walzwerk zur Herstellung von Draht und Rippenstahl
IT1090143B (it) * 1975-01-29 1985-06-18 Centre Rech Metallurgique Procedimento per fabbricare dei prodotti laminati di acciaio
BE837884A (fr) * 1976-01-23 1976-05-14 Centre Rech Metallurgique Perfectionnements aux dispositifs de refroidissement des profiles metalliques
DE2717780B2 (de) * 1977-04-21 1979-11-29 Hamburger Stahlwerke Gmbh, 2103 Hamburg Herstellung von Walzdraht
BE867299A (fr) * 1978-05-19 1978-09-18 Centre Rech Metallurgique Perfectionnements aux dispositifs de refroidissement de produits metalliques allonges
FR2458499A1 (fr) * 1979-06-07 1981-01-02 Siderurgie Fse Inst Rech Dispositif d'entrainement de produits longs en defilement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0312843A1 (de) * 1987-10-22 1989-04-26 Sms Schloemann-Siemag Aktiengesellschaft Verfahren zur Wärmeübertragung und dessen Anwendung zum temperaturkontrollierten Kühlen von Walzgut

Also Published As

Publication number Publication date
DE3484488D1 (de) 1991-05-29
JPH0557331B2 (de) 1993-08-23
EP0132249A3 (en) 1987-10-14
ES534386A0 (es) 1985-06-01
AU3077284A (en) 1985-01-24
EP0132249B1 (de) 1991-04-24
GB2143452B (en) 1987-07-08
ATE62837T1 (de) 1991-05-15
GB8418285D0 (en) 1984-08-22
JPS60155623A (ja) 1985-08-15
LU84922A1 (fr) 1985-04-17
KR850001037A (ko) 1985-03-14
CA1245080A (en) 1988-11-22
AU580960B2 (en) 1989-02-09
GB2143452A (en) 1985-02-13
US4625532A (en) 1986-12-02
ES8505726A1 (es) 1985-06-01
KR920000232B1 (ko) 1992-01-10
ZA845522B (en) 1985-03-27

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