EP1892048A1 - Procédé et appareil pour le nettoyage dynamique de la surface et redressement de tiges et/ou de barres de fil d'acier - Google Patents

Procédé et appareil pour le nettoyage dynamique de la surface et redressement de tiges et/ou de barres de fil d'acier Download PDF

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Publication number
EP1892048A1
EP1892048A1 EP07015876A EP07015876A EP1892048A1 EP 1892048 A1 EP1892048 A1 EP 1892048A1 EP 07015876 A EP07015876 A EP 07015876A EP 07015876 A EP07015876 A EP 07015876A EP 1892048 A1 EP1892048 A1 EP 1892048A1
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EP
European Patent Office
Prior art keywords
profiled element
rotation
bushes
straightening
rotating
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.)
Withdrawn
Application number
EP07015876A
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German (de)
English (en)
Inventor
Claudio Bernardinis
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.)
AWM SpA
Original Assignee
AWM SpA
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Filing date
Publication date
Application filed by AWM SpA filed Critical AWM SpA
Publication of EP1892048A1 publication Critical patent/EP1892048A1/fr
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C43/00—Devices for cleaning metal products combined with or specially adapted for use with machines or apparatus provided for in this subclass
    • B21C43/02—Devices for cleaning metal products combined with or specially adapted for use with machines or apparatus provided for in this subclass combined with or specially adapted for use in connection with drawing or winding machines or apparatus
    • B21C43/04—Devices for de-scaling wire or like flexible work

Definitions

  • the present invention relates to a method for dynamic straightening and surface cleaning of a wire rod and/or profiled elements and to the corresponding apparatus.
  • the steel in rods and/or the profiled elements with a round cross-section produced by steelworks are provided in the form of large coils which weigh approximately 2000 to 5000 kg; these materials require adequate straightening and surface cleaning before being used, particularly in the manufacture of electro-welded metal nets and/or three-dimensional cages used in the building sector and in industrial prefabrication.
  • the hot-rolled material provided in the form of coils must also be cold-stressed to the proximity of its yield strength, in order to strain-harden its surface to improve its mechanical strength characteristics, and its surface must be cleaned of iron scale (iron oxide) and/or other impurities to facilitate subsequent operations (for example electro-welding et cetera).
  • the aim of the invention is to provide an apparatus or a machine which is capable of performing simultaneously the three functions for treating the profiled steel, i. e.: straightening, simultaneous strain-hardening, and the cleaning of iron scale and/or other impurities that are present.
  • the method is based essentially on the fact that along a clearly delimited portion, the rolled bar is subjected to a "spindle-like" orbital rotation with respect to the input and output advancement axis.
  • the produced profiled steel is to be subjected to galvanizing, chromium plating, et cetera, it must be absolutely and perfectly free from iron scale and other impurities.
  • the aim of the invention is achieved according to the characteristics of the main claim and/or of any other claim cited in this patent text by means of the method and corresponding apparatus for dynamic straightening and surface cleaning for wire rods and/or bars made of steel, originally hot- and/or cold-rolled in the form of coils.
  • the present process is meant to perform on the advancing hot steel rolled element, in a single operation, quick straightening, excellent surface cleaning of iron scale that is present and/or other impurities, and a dynamic traction stress in order to achieve a controlled elongation.
  • the machine applies to the rolled element the following controlled functions: alternating rotary stretching of the outer layers of the section (the profiled element does not rotate about itself); axial stretching, centrifugal effect, aerodynamic effect.
  • the material in particular hot-rolled steel, is provided on its surface with an oxide known as iron scale, which hinders subsequent processes (for example electro-welding) and has the effect of continuously releasing flakes which damage the machines and also contaminate the work environment.
  • oxide known as iron scale
  • the rolled element is made to pass through a central hole, which is coaxial to the advancement direction, entering one and exiting from the other.
  • the material which arrives horizontally along the advancement and rotation axis of the first bush, is immediately inclined slightly in order to deflect it eccentrically in its rotation with respect to the incoming axis and is subsequently passed through the second rotating bush, which is coaxial to the preceding one, first at an angle (skewed) and then centrally (i. e., in the opposite manner with respect to the first bush). Since both bushes rotate about their own axis and the angular velocity of each bush can be controlled, this determines a spindle-like rotation of the profiled element between the two bushes.
  • the profiled steel between the two rotating bushes is curved with a large central bend, and in this point the rotation radius depends on its orbital rotation velocity, on its mass and on its controlled elongation.
  • the rolled part, in its advancement through the rotating bushes, does not rotate about itself and is not subjected to torsion except minimally and in any case to an extent which can be controlled.
  • the material is straight and most of all clean.
  • the material of the profiled element in the spindle-like rotation step due to centrifugal force, in fact tends to elongate and bend along its entire outer surface, facilitating the separation of iron scale in more or less small flakes. This is due to the fact that the bar does not rotate about itself and is therefore subjected to alternating stretching and compression in the peripheral parts of the section of the rolled element.
  • the particles of iron scale and/or other impurities by separating from the profiled element, are propelled at speed (centrifugal force) against the internal surface of the container or housing and can be collected by gravity and/or, in the case of the smallest, by aerodynamic effect caused by the spindle-like rotation of the profiled element itself, and aspirated and conveyed into an appropriate centrifugal collector.
  • the material, as it exits from the machine according to the present invention, is perfectly clean on its outer surface and is ideal and ready to be further processed on machines (for example electro-welded, bent, et cetera) or to be subjected to other protective treatments (such as for example galvanizing, chromium plating, et cetera).
  • the process for dynamic treatment of the material or the apparatus conceived according to the present invention allows to control constantly the stretching of the material during the spindle-like rotation step by virtue of appropriately provided systems for managing and adjusting the two traction elements with load cells in the input to and the output from the two rotating bushes, thus determining the advancement speed of the wire rod being treated.
  • the two rotation speeds of the respective input and output bushes are managed and adjusted, controlling by means of appropriately provided sensors the breadth of the spindle-like rotation radius of the profiled element being treated.
  • the machine provided according to the present method uses, in the region of orbital rotation of the rolled element, a suitable housing or protection shaped like a container for collecting the flakes of iron scale and of other impurities which detach from the surface of said rolled element due to an aerodynamic and/or centrifugal effect, which has a dual function: avoid the dispersion of the flakes into the environment, facilitating their collection, and protecting the operators.
  • said hot-rolled profiled material can be subjected to multiple stresses in series, i. e., by making it pass through multiple machines in line, which make it turn by orbiting in a spindle-like manner in the same direction or in the opposite direction, or through multiple successive rotating and non-rotating bushes which have identical or different pitches.
  • the rolled element can be again rewound into coils and/or drawn by means of suitable dies, and/or cold-rolled with suitable rolling assemblies and/or collected and reduced to straight bars cut to size and/or processed directly by bending it into the most disparate geometric shapes.
  • Another variation to the machine in a simplified essential form which does not have input and/or output roller traction assemblies, might comprise only the rotating input bush and rotating output bush assembly and the corresponding covering housing. This is sufficient to be able to perform the spindle-like orbital rotation of the metallic laminated element between the two bushes and to obtain a stretched, straight and clean product.
  • Another variation of the present invention consists in using capstan systems instead of any traction or guiding elements with rollers upstream and/or downstream.
  • a further application of the present invention consists in providing said machine which imparts a spindle-like orbital rotation of the rolled element which uses a single rotating bush, which has a controlled eccentricity, and another bush of the fixed type.
  • a further variation to the machine consists in using equivalent systems for making the rolled element orbit in a spindle-like manner, such as for example systems which use a rotating magnetic field, an oscillating magnetic field and or and/or other rotating and/or orbiting systems.
  • the present invention is suitable to be used as a dynamic test on metallic wires or bars.
  • a preferred embodiment of the machine which corresponds to the method for treating the hot- or cold-rolled profiled steel (1, 1.1, 1.2).
  • the machine is arranged downstream with respect to the device for unwinding coils of steel bar, which is simply drawn (2) in a straight manner and guided toward the input rotating bush assembly (3).
  • Said assembly has a particular bush, which rotates about itself by virtue of suitable motion and actuation means, and is provided with a hole for the insertion of the metallic profiled element in a central position with respect to its rotation axis, and with an exit hole which is slightly eccentric (in this manner, the profiled element is forced to exit with a slight inclination).
  • the profiled element is then forced to enter the second rotating bush (4) through the hole which is slightly eccentric with respect to the final exit hole, which is coaxial to its own rotation axis.
  • the second rotating bush is also motorized and actuated in its rotation. Finally, the profiled element (1.2) is drawn (5) in a straight manner for subsequent processes.
  • the two traction assemblies, (2) upstream and (5) downstream, are driven by the motor (10) and the motion is adjusted by the differential unit (11), and therefore it is possible to control and adjust the advancement of the rolled element in input and in output with respect to the spindle-like orbit region of the rolled element (1.1).
  • the essence of the present invention lies in the particular rotating input and output bushes (3, 4) and in the spindle-like rotation of the rolled element (1.1) at a rotation speed which is controlled and managed automatically in order to allow constant control of the speed of spindle-like rotation of the profiled element, of the breadth of the radius of the rotation to which the profiled element is subjected, and the consequent extent of the tension for drawing the profiled element during its spindle-like rotation. All these factors are constantly controlled and managed by virtue of suitable automation means which are known to those skilled in the art.
  • the motor (8) in fact transmits its motion to the assembly of the rotating bush (4) and at the same time to the rotating bush (3) through a suitable adjustable differential unit (9) in order to vary and control the spindle-like orbital rotation of the rolled element.
  • the rolled element during treatment, does not rotates about itself, and therefore alternating stretching and compressions of the peripheral part of the section are determined.
  • the two rotating bushes (3, 4), or just one bush can move at a mutually adjustable distance.
  • the rotation axes of both bushes are coaxial or not.
  • the machine particularly in the central region (i. e., the region where the metallic profiled element is made to turn in a spindle-like manner), is enclosed in a housing-like container (6) for protection and safety of the operators, which is meant to collect the iron scale flakes (7) which separate from the surface of the rotating profiled element and are subjected both to centrifugal force and to the effect of stretching the material and to the consequent aerodynamic effect.
  • Small iron scale flakes (7) are collected both by gravity and by suction generated by the aerodynamic rotation effect of the profiled element (1.1) inside said container. This avoids the dispersion of iron scale dust into the work environment.
  • the profiled element during the spindle-like rotation, is subjected to a centrifugal force and to a drawing tension between the two rotating bushes (3, 4), which determines the chosen elongation (improving the mechanical characteristics of the product), and the separation from the outer surface of the iron oxide in the form of small flakes, which are then collected.
  • Said profiled element at the exit from the second rotating bush (4), exits straight, cleaned on its surface and slightly elongated.
  • a traction assembly is then provided in order to be able to evacuate the material for subsequent work steps (for example cutting to size, rewinding into coils, drawing, et cetera).
  • the main body of the machine is constituted by the two assemblies with rotating bushes which produce a controlled spindle-like orbital rotation of the metallic rolled element, producing an alternating rotary stretching of the peripheral layers of the cross-section (the bar does not rotate about itself) and axial stretching, surface cleaning by virtue of the centrifugal and aerodynamic effect caused by spindle-like rotation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
EP07015876A 2006-08-24 2007-08-13 Procédé et appareil pour le nettoyage dynamique de la surface et redressement de tiges et/ou de barres de fil d'acier Withdrawn EP1892048A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITUD20060202 ITUD20060202A1 (it) 2006-08-24 2006-08-24 "metodo ed apparato di raddrizzatura e pulizia superficiale dinamica per vergella e/o tondini in acciaio

Publications (1)

Publication Number Publication Date
EP1892048A1 true EP1892048A1 (fr) 2008-02-27

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EP07015876A Withdrawn EP1892048A1 (fr) 2006-08-24 2007-08-13 Procédé et appareil pour le nettoyage dynamique de la surface et redressement de tiges et/ou de barres de fil d'acier

Country Status (2)

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EP (1) EP1892048A1 (fr)
IT (1) ITUD20060202A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107262552A (zh) * 2017-07-31 2017-10-20 安徽华众焊业有限公司 一种焊丝擦拭装置
CN108907718A (zh) * 2018-08-28 2018-11-30 常州华亚铝业有限公司 一种防锈铝锰焊丝生产设备
CN109226292A (zh) * 2018-10-22 2019-01-18 梁秀旦 用于冷轧辊加工后的氧化皮刮渣装置
CN110441174A (zh) * 2019-07-09 2019-11-12 郑州大学 一种研究循环动荷载下应变硬化土疲劳损伤判定的方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4004374A (en) * 1974-08-07 1977-01-25 Joseph Johannes Maria Annegarn Descaling bent rod with separated cleaning particles
EP0100236A1 (fr) * 1982-07-26 1984-02-08 Paromec Engineering Limited Nettoyage d'un fil
SU1362526A1 (ru) * 1986-05-13 1987-12-30 Каунасский Политехнический Институт Им.Антанаса Снечкуса Способ очистки проволоки от окалины и устройство дл его осуществлени

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4004374A (en) * 1974-08-07 1977-01-25 Joseph Johannes Maria Annegarn Descaling bent rod with separated cleaning particles
EP0100236A1 (fr) * 1982-07-26 1984-02-08 Paromec Engineering Limited Nettoyage d'un fil
SU1362526A1 (ru) * 1986-05-13 1987-12-30 Каунасский Политехнический Институт Им.Антанаса Снечкуса Способ очистки проволоки от окалины и устройство дл его осуществлени

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 198829, Derwent World Patents Index; AN 1988-203754, XP002458967 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107262552A (zh) * 2017-07-31 2017-10-20 安徽华众焊业有限公司 一种焊丝擦拭装置
CN108907718A (zh) * 2018-08-28 2018-11-30 常州华亚铝业有限公司 一种防锈铝锰焊丝生产设备
CN108907718B (zh) * 2018-08-28 2019-07-30 常州华亚铝业有限公司 一种防锈铝锰焊丝生产设备
CN109226292A (zh) * 2018-10-22 2019-01-18 梁秀旦 用于冷轧辊加工后的氧化皮刮渣装置
CN109226292B (zh) * 2018-10-22 2020-02-21 温州宏量机械科技有限公司 用于冷轧辊加工后的氧化皮刮渣装置
CN110441174A (zh) * 2019-07-09 2019-11-12 郑州大学 一种研究循环动荷载下应变硬化土疲劳损伤判定的方法
CN110441174B (zh) * 2019-07-09 2022-02-15 郑州大学 一种研究循环动荷载下应变硬化土疲劳损伤判定的方法

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