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EP0878562A1 - Appareil pour préparer des fils en acier, fer ou matériaux ferreux à étirage - Google Patents

Appareil pour préparer des fils en acier, fer ou matériaux ferreux à étirage Download PDF

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Publication number
EP0878562A1
EP0878562A1 EP97108041A EP97108041A EP0878562A1 EP 0878562 A1 EP0878562 A1 EP 0878562A1 EP 97108041 A EP97108041 A EP 97108041A EP 97108041 A EP97108041 A EP 97108041A EP 0878562 A1 EP0878562 A1 EP 0878562A1
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EP
European Patent Office
Prior art keywords
wire
station
drum
phosphating
vat
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Withdrawn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
EP97108041A
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German (de)
English (en)
Inventor
Santo Esposito
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Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to EP97108041A priority Critical patent/EP0878562A1/fr
Publication of EP0878562A1 publication Critical patent/EP0878562A1/fr
Withdrawn legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • 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
    • B21C9/00—Cooling, heating or lubricating drawing material

Definitions

  • the present invention relates to a system for preparing wires made of steel, iron, or ferrous materials in general for drawing.
  • These preparatory operations include a first step, known as mordanting, which essentially consists in submerging the wire in a solution of water and sulfuric or hydrochloric acid for a preset time in order to remove lamination scales and surface oxides from the surface of the wire.
  • mordanting essentially consists in submerging the wire in a solution of water and sulfuric or hydrochloric acid for a preset time in order to remove lamination scales and surface oxides from the surface of the wire.
  • this operation can be performed by electrolytic pickling, using electrolytic solutions having weak concentrations of sulfuric or hydrochloric acid.
  • the wire is then cleaned and blown by means of water with continuous replacement and with pressurized air nozzles.
  • the wire is then subjected to phosphating (bonderizing), which is performed by dipping the wire in a solution of water and zinc salts in an environment that is slightly acid due to phosphoric acid at temperatures that can vary between 50 o C and 85 o C.
  • phosphating bonderizing
  • the phosphating operation has the purpose of producing, on the surface of the wire, tightly adhering zinc phosphate crystals that facilitate the adhesion of stearates during drawing, preventing wire-die contact, which would lead to seizure, and allowing the desired drawing rate.
  • the wire is cleaned and blown with hot air so that the wire is dry and ready for subsequent neutralization, which is performed with lime or borax using highly concentrated solutions.
  • the wire is subjected to further drying and is stored, ready to be drawn.
  • the systems currently used to perform these operations for preparing the wire for drawing are generally constituted by a plurality of vats, through which the wire is passed to undergo the various operations for pickling, phosphating, and neutralization with borax.
  • the systems currently being used can be distinguished into continuous-type systems, in which the wire is treated online by virtue of the continuous advancement of the wire in the various vats, and into discontinuous-type systems, in which the various operations for preparing the wire are performed by dipping coils of wire in the various vats in sequence.
  • Continuous-type systems are generally used to treat semifinished wires as they leave the patenting oven. These systems are capable of treating a plurality of wires simultaneously and the speed of the preparation process is closely correlated to the rate of advancement of the wire leaving the patenting oven.
  • the speed of the preparation process is closely correlated to the rate of advancement of the wire leaving the patenting oven.
  • In order to adapt to the times required to perform the various pickling, bonderizing, and borax neutralization operations it is necessary to use very long vats and considerable amounts of acid solution, with consequent ecological problems for the subsequent neutralization of these substances. With these systems it is therefore necessary to have considerable space available due to the size of the vats and it is also necessary to have a large space available to store the coils after preparation.
  • the coils are dipped individually in side-by-side vats, so as to perform the descaling step, the cleaning step, the phosphating step, an additional cleaning step, the borax neutralization step, and the final cleaning sequentially.
  • these kinds of system it is necessary to provide a plurality of vats for the phosphating operation, so as to adapt to process and production times.
  • These systems have the problem that they require considerable manual work to perform all the preparatory operations by virtue of lifting units to move the coils from one vat to the other.
  • the aim of the present invention is to solve the above described problems by providing a system for preparing wires made of steel, iron, or ferrous materials in general for drawing which requires very small spaces with respect to those required by conventional systems.
  • an object of the invention is to provide a system that requires low investments for its execution.
  • Another object of the invention is to provide a system that allows to considerably reduce the costs for preparing the wire for drawing.
  • Another object of the invention is to provide a system that is highly flexible in use.
  • Another object of the invention is to provide a system that can correctly prepare wires for subsequent drawing without requiring large amounts of solutions or treatment liquids, thus reducing the amount of pollutants and the consequent costs for their neutralization.
  • a system for preparing wires made of steel, iron, or ferrous materials in general for drawing characterized in that it comprises a phosphating station that comprises a vat for containing a phosphating solution and a drum for winding and unwinding the wire to be treated, said drum being at least partially immersed in said phosphating solution and being actuatable with a rotary motion about its own axis to gradually wind the wire to be treated and gradually release the treated wire.
  • the system according to the invention forms a path for the continuous advancement of a wire 2 to be treated, which is made of steel, iron, or ferrous materials in general and runs through a station 3 for mechanical pickling, a station 4 for phosphating (bonderizing) and a station 5 for neutralizing with borax.
  • the pickling station 3 comprises means for deforming the wire 2 around at least two axes that are substantially perpendicular to each other so as to separate the milling scales and the oxides from the surface of the wire 2.
  • These deformation means are constituted, in the illustrated embodiment, by a series of pulleys 6 that are arranged so that their axes are horizontal and are followed by one or more pulleys 7 that are arranged so that their axes are also horizontal but at right angles to the axes of the pulleys 6.
  • wire cleaning means that can be constituted by conventional cleaning brushes that are not illustrated for the sake of simplicity.
  • Said cleaning station 9 Downstream of the pickling station 3, along the advancement direction of the wire 2, and before the phosphating station 4, there is a station 9 for cleaning the wire after pickling.
  • Said cleaning station 9 comprises a chamber 10 inside which there are nozzles for delivering jets of water and nozzles for delivering air.
  • a filter 11 is arranged below the chamber 10 to filter the water used in this cleaning step.
  • the phosphating station 4 comprises, according to the invention, a vat 12 that is adapted to contain the phosphating liquid and a drum 13 on which the wire 2 that arrives from the cleaning station 9 is gradually wound and unwound.
  • the drum 13 is preferably arranged so that its axis 13a is horizontal and is partially immersed in the phosphating solution.
  • the drum 13 can be actuated with a rotary motion about its own axis 13a by virtue of a variable-speed gearmotor 14.
  • the portion on which the wire 2 is meant to wind is substantially shaped like a truncated cone whose cross-section tapers gradually, starting from the region where the wire starts to be wound and toward the region where said wire is released; said wire winds in turns around the reel 13.
  • Said frustum-shaped portion where traction is applied is coated with a wearproof material that can be constituted by ceramic material or by an applied part made of hard metal such as Widia (tungsten carbide) or the like.
  • At least one part of the portion of the drum on which the wire 2 winds has a frame-like structure.
  • said frame-like structure is constituted by a plurality of bars 15 that are mutually spaced about the axis 13a of the drum 13 and are orientated along directrices of the frustum-shaped surface of the drum 13.
  • the portions of the bars 15 that are meant to make contact with the wire 2 are conveniently made of a material that is highly resistant to wear and to corrosion by the phosphating solution.
  • the portions meant to make contact with the wire 2 can be constituted by inserts 16a, 16b, and 16c that may have different shapes according to the requirements and are inserted in adapted seats formed in the body of the bars 15, so as to protrude laterally from the bars in order to make contact with the wire 2 and protect the remaining part of the bars 15 from said contact.
  • These inserts 16a, 16b, and 16c can be constituted, for example, by ceramic materials, sintered metals, or other conventional highly wear- and corrosion-resistant material.
  • the phosphating solution to be used in the vat 12 is stored inside a reservoir 17 that is also provided with means for heating the solution; said means are constituted for example by a conventional burner 18 that is connected to said reservoir 17.
  • the reservoir 17 is connected to the vat 12 by virtue of means for conveying the phosphating solution from the reservoir 17 to the vat 12 and vice versa, from the vat 12 to the reservoir 17.
  • said conveying means comprise a duct 19 that connects the reservoir 17 to the vat 12 and leads into the vat 12 above the drum 13, so as to deliver the phosphating liquid, which arrives from the reservoir 17, directly onto the drum 13, on which the wire 2 winds and unwinds continuously.
  • the vat 12 is closed at the top by an openable cover 21.
  • Means are furthermore arranged inside the vat 12 to reduce the traction applied to the wire 2 between the region where winding on the drum 13 begins and the region where it is released, so as to avoid packing of the wire 2 on the drum 13 and thus facilitate contact between the phosphating solution and the surface of the wire 2.
  • These traction reducing means are constituted by two pulleys 22a and 22b that are arranged so that their axes are horizontal and mutually parallel and force the wire to undergo a deformation along two mutually opposite curves, so as to reduce the tension T2 applied to the wire that leaves the phosphating station 4 until the tension T1 on the wire that unwinds from the drum 13 is significantly lower than the tension T2 and significantly lower than the tension T that is applied to the wire when it begins to be wound on the drum 13; said tension is determined by the deformations that the wire undergoes during pickling and during its extraction from the drum 13 as a consequence of the actuation of the drum 13 with a rotary motion about its own axis.
  • the borax treatment station 5 comprises an overflow vat 24 that is crossed by the immersed wire 2 and is fed continuously with lime or borax in a highly concentrated solution by means of a pump that draws from an underlying vat 25.
  • vat 25 can be kept at an adapted temperature, substantially 75 o C, by virtue of the circulation of hot water next to the walls of said vat 25.
  • the wire Downstream of the borax treatment station 5, the wire is sent to the drums of the drawing machine, which apply to said wire a traction that also affects the path followed by the wire through the system according to the invention.
  • means 27 for compensating the variations in the advancement rate of the wire as it leaves the system are arranged between the phosphating station 4 and the borax treatment station 5.
  • Said compensating means 27 comprise two pulleys 28a and 28b, on which the wire that leaves the phosphating station 4 winds; said pulleys are arranged so that their axes are mutually horizontal and parallel.
  • the position of the pulley 28a is fixed, whilst the pulley 28b can move toward or away from the pulley 28a, since it is supported by a structure 29 so that it can slide vertically.
  • the movement of the pulley 28b toward the pulley 28a is contrasted by means of a fluid-actuated cylinder 30 that is arranged so that its axis is vertical and is connected to the pulley 28b by means of the stem 30a of its piston.
  • the fluid-actuated cylinder 30 is conveniently constituted by a pneumatic cylinder that is continuously supplied with pressurized air through a duct 31 on which there is a regulator valve 32 in order to regulate the traction of the wire at the exit from the phosphating vat (T2).
  • the pulley 28b is furthermore controlled by a sensor 33 that detects the movements of the pulley 28b, i.e., the variations in the distance between the pulley 28a and the pulley 28b, and is connected to an actuation and control element 34 that supervises the operation of the machine.
  • the actuation and control element 34 is connected to the gearmotor 14 so as to vary the actuation rate of the drum 13 to adapt said rate to the advancement rate of the wire set by the drawing system.
  • a guiding pulley 35 is arranged below the pulley 28a, and means for detecting the advancement rate of the wire are arranged between said pulley 35 and the inlet of the borax treatment station 5; said detector means can be constituted, for example, by an encoder that is mounted on the shaft of a pulley 36.
  • the encoder mounted on the pulley 36 is also connected to the actuation and control element 34, which thus constantly controls the advancement rate of the wire 2, varying the actuation rate of the drum 13 if necessary.
  • an additional pair of guiding pulleys is arranged along the path of the system and more particularly between the cleaning station 9 and the phosphating station 4.
  • the wire 2 that leaves the pickling station 3 is optionally subjected to mechanical brushing, which completes the removal of the milling scales and of the oxides.
  • the wire 2 is then cleaned in the cleaning station 9 and dried with air jets.
  • the wire 2 by gradually winding on the drum 13 and gradually unwinding from it, is subjected to the action of the phosphating solution.
  • the wire is cleaned and dried in the chamber 23 and then subjected to treatment with borax by passing through the vat 24. Finally, in passing through the chamber 26, the wire is dried and is ready to enter the die.
  • the system according to the invention for feeding conventional dies requires very small spaces, since it does not require the use of bulky vats to perform pickling and phosphating.
  • the system according to the invention is capable of operating by using smaller amounts of phosphating solutions, generating less pollution problems and furthermore reducing costs for the treatment of these solutions when they are no longer used.
  • the materials employed, as well as the dimensions, may be any according to the requirements and the state of the art.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
EP97108041A 1997-05-16 1997-05-16 Appareil pour préparer des fils en acier, fer ou matériaux ferreux à étirage Withdrawn EP0878562A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP97108041A EP0878562A1 (fr) 1997-05-16 1997-05-16 Appareil pour préparer des fils en acier, fer ou matériaux ferreux à étirage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP97108041A EP0878562A1 (fr) 1997-05-16 1997-05-16 Appareil pour préparer des fils en acier, fer ou matériaux ferreux à étirage

Publications (1)

Publication Number Publication Date
EP0878562A1 true EP0878562A1 (fr) 1998-11-18

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EP97108041A Withdrawn EP0878562A1 (fr) 1997-05-16 1997-05-16 Appareil pour préparer des fils en acier, fer ou matériaux ferreux à étirage

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009147470A1 (fr) * 2008-06-04 2009-12-10 I.C.M.I. S.R.L. Usine pour le traitement de fils de métal destinés à une opération de dessin
US9222605B2 (en) 2008-10-17 2015-12-29 Hutchinson Ducting for a fluid transfer pipeline for an aircraft or spacecraft, method for producing same and aeronautical structure incorporating same
CN110433551A (zh) * 2019-08-30 2019-11-12 河南恒星钢缆股份有限公司 新型涂硼装置

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE450886A (fr) *
GB928435A (en) * 1961-02-14 1963-06-12 British Oxygen Co Ltd Apparatus and methods for the treatment of wire
US3354687A (en) * 1965-06-23 1967-11-28 Nat Standard Co Combination wire treating and drawing apparatus and process
GB1165015A (en) * 1966-08-22 1969-09-24 Herbert Kenmore A Process for Cleaning Wire and Like Strip Material.
DE1953133A1 (de) * 1968-11-25 1970-06-11 Ruthner Ind Planungs Ag Verfahren und Vorrichtung zum kontinuierlichen Beizen von Draht
AT294521B (de) * 1969-12-01 1971-11-25 Ruthner Othmar Verfahren und Vorrichtung zum kontinuierlichen Beizen von Draht
FR2359059A1 (fr) * 1976-07-22 1978-02-17 Ruthner Industrieanlagen Ag Dispositif pour le transport continu de fil a travers un espace de traitement
DE3611185A1 (de) * 1986-04-03 1987-12-23 Kieserling Ziehmaschinen Vorrichtung und verfahren zur oberflaechenbehandlung von draht oder dgl.
EP0775759A1 (fr) * 1995-11-22 1997-05-28 Santo Esposito Appareil pour préparer des fils en acier, fer ou matériaux ferreux à l'étirage

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE450886A (fr) *
GB928435A (en) * 1961-02-14 1963-06-12 British Oxygen Co Ltd Apparatus and methods for the treatment of wire
US3354687A (en) * 1965-06-23 1967-11-28 Nat Standard Co Combination wire treating and drawing apparatus and process
GB1165015A (en) * 1966-08-22 1969-09-24 Herbert Kenmore A Process for Cleaning Wire and Like Strip Material.
DE1953133A1 (de) * 1968-11-25 1970-06-11 Ruthner Ind Planungs Ag Verfahren und Vorrichtung zum kontinuierlichen Beizen von Draht
AT294521B (de) * 1969-12-01 1971-11-25 Ruthner Othmar Verfahren und Vorrichtung zum kontinuierlichen Beizen von Draht
FR2359059A1 (fr) * 1976-07-22 1978-02-17 Ruthner Industrieanlagen Ag Dispositif pour le transport continu de fil a travers un espace de traitement
DE3611185A1 (de) * 1986-04-03 1987-12-23 Kieserling Ziehmaschinen Vorrichtung und verfahren zur oberflaechenbehandlung von draht oder dgl.
EP0775759A1 (fr) * 1995-11-22 1997-05-28 Santo Esposito Appareil pour préparer des fils en acier, fer ou matériaux ferreux à l'étirage

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009147470A1 (fr) * 2008-06-04 2009-12-10 I.C.M.I. S.R.L. Usine pour le traitement de fils de métal destinés à une opération de dessin
US9222605B2 (en) 2008-10-17 2015-12-29 Hutchinson Ducting for a fluid transfer pipeline for an aircraft or spacecraft, method for producing same and aeronautical structure incorporating same
CN110433551A (zh) * 2019-08-30 2019-11-12 河南恒星钢缆股份有限公司 新型涂硼装置

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