US3573118A - Methods and apparatus for handling wire rod - Google Patents

Methods and apparatus for handling wire rod Download PDF

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Publication number
US3573118A
US3573118A US811492A US3573118DA US3573118A US 3573118 A US3573118 A US 3573118A US 811492 A US811492 A US 811492A US 3573118D A US3573118D A US 3573118DA US 3573118 A US3573118 A US 3573118A
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US
United States
Prior art keywords
rod
wire rod
cooling
reel
temperature
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
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US811492A
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English (en)
Inventor
Friedrich Kocks
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Friedrich Kocks GmbH and Co
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Individual
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Filing date
Publication date
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Publication of US3573118A publication Critical patent/US3573118A/en
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/573—Continuous furnaces for strip or wire with cooling
    • C21D9/5732—Continuous furnaces for strip or wire with cooling of wires; of rods
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for rods

Definitions

  • a method and apparatus are provided for controlled cooling of wire rod from a hot rolling mill to provide grain structure suitable for subsequent drawing by the steps of cooling said rod to a temperature between 930 F. and 11 10 F. on a cooling line and holding said cooled rod on a preheated reel at about 930 F. until the temperature of the rod has stabilized.
  • This invention relates to methods and apparatus for handling wire rod and particularly to a method and a de vice for the controlled cooling of wire rod coming out of a hot rolling mill and transporting same over a cooling line.
  • Another method which has been used to accomplish controlled cooling of wire rod is to lay the wire rod, coming out of the hot rolling mill without any previous cooling, with the help of a laying device in sprial loops on a moving transport conveyor, where the wire rod can be cooled by using cooling devices with water or air cooling.
  • This method has certain disadvantages, since the spiral wire rod loops partly overlap, and come in contact with each other, which is unavoidable and causes non-uniform cooling and, therefore, different grain structures. Wobbling or vibrating devices used to avoid this undesired overlapping did not produce satisfactory results, and did not solve the problems of this method.
  • the wire rod is collected and coiled in reels and after this coiling operation, immediately moved to an apron or hook conveyor, which is, however, also very disadvantageous and can result in a non-uniform grain structure of the rod. It is therefore not advisable to form such a compact wire rod coil, which cannot be cooled uniformly because of its large mass.
  • the method according to this invention for controlled cooling preferably comprises the steps of cooling the wire rod on a cooling conveyor down to 930 F. to 1110 F., and feeding the rod afterwards into a reel preheated to approximately 930 P. where the wire rod is held to permit temperature stabilization (about 10 to 30 seconds), and which is enough time for a grain structure transformation.
  • temperature stabilization about 10 to 30 seconds
  • the provided holding time for the wire rod in the reel allows for a compensation in the wire rod temperature which shows a difference of about 210 F. between core and outside of the wire rod before entering the reel, and accordingly, makes possible the formation of a uniform grain structure over the entire coil.
  • the main advantage of a lower entering temperature of the wire rod into the reel is that the wire rod already possess a certain stiffness and can therefore, be fed in through a vertical laying pipe or similar equipment without any interruptions so that the loop is formed automatically.
  • a mandrel pin or similar equipment can be provided under the vertical laying pipe to make sure that the loop is always formed in the same direction.
  • the wire rod It is preferred to cool the wire rod down to the range 930 F. to 1110 F. on a cooling line consisting of several sections intermittently arranged for intensive heat dissipation on the one hand, and for heat compensation on the other hand, and to feed the rod afterwards into the preheated reel.
  • the complete cooling line therefore, can consist for example of a cooling line provided with water, air or other cooling medium, arranged behind the rolling mill, and of an adjoining uncooled equalization line provided for temperature compensation of the wire rod.
  • the cooling line for temperature equalization can be of a length equal to a multiple of the length of the cooling line for intensive heat dissipation. It is preferred also to arrange another cooling line or cooling section supplied with a cooling medium in such a Way that the wire rod is cooled down to a certain temperature before entering the preheated reel.
  • An apparatus for the execution of this method preferably comprises a reel completely or partially heated for the takeup of the incoming wire rod and built and arranged in such a way, that the wire rod is only touched and held by parts of the reel having an anticipated temperature of approximately 930 F.
  • the reel be preheated and always held at the required temperature during operations. After the rolling mill is in operation for a certain period of time, and a certain temperature balance has been established in the reel through heat radiation of the wire loops remaining therefor a short time, additional heating is not required anymore. It is however necessary to hold the reel during operations always at the required temperature.
  • bottom, shell, pin, and/or other reel parts can be heated to the required temperature and held there by using specially suited heating elements.
  • the reel or individual reel parts can be heated electrically, or by devices using gaseous, liquid or solid heating materials. It is of advantage, of course, to use heating devices already provided or required for other purposes for heating of the reel.
  • the reel parts designated to be heated can be provided with some insulation against undesired temperature losses. It is also of advantage to provide the inside of the reel with a lining of a material having a low thermal conductivity. Refractory materials or heat storing metals can be used for example.
  • the invention is further characterized that completely or partially automatically working control, regulating, and/or measuring devices or the like are provided for holding and controlling of the required temperatures and time intervals. It is also possible according to the prevailing conditions to execute the required functions manually.
  • the cooled rod thenpasses through pinch rolls into guide pipe 4 where it is delivered to laying head 5 from which it is coiled into a refractory tub 7 having an inner heated liner 6 around a central post or mandrel 8.
  • the mandrel 8 may, like the liner 6, be heated.
  • the temperature within the tub is held at about 500 C. This heating may be accomplished by heating with gas or electricity by any of a variety of well known and conventional systems.
  • a method for controlled cooling of wire rod from a hot rolling mill to provide grain structure suitable for subsequent drawing comprising the steps of (a) cooling said rod leaving the mill to a temperature in the range 930 F. to 1110 F.; (b) delivering said cooled rod to a reel preheated to about 930 F.;
  • An apparatus for controlled cooling of wire rod from a hot rolling mill to provide grain structure suitable for subsequent drawing comprising a cooling line receiving said rod from said hot rolling mill, means at said cooling line reducing the temperature of the rod to a point within the range 930 F. to 1110 F., a heated reel adjacent the cooling line receiving the rod from said cooling line, and heating means maintaining the reel at a temperature of about 930 F.
  • cooling line includes an area of intensive heat dissipation followed by an area of temperature equalization preceding the heated reel.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)
US811492A 1968-03-29 1969-03-28 Methods and apparatus for handling wire rod Expired - Lifetime US3573118A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681758070 DE1758070A1 (de) 1968-03-29 1968-03-29 Verfahren und Vorrichtung zur gesteuerten Abkuehlung eines aus der Walzhitze kommenden ueber eine Kuehlstrecke gefuehrten Drahtes

Publications (1)

Publication Number Publication Date
US3573118A true US3573118A (en) 1971-03-30

Family

ID=5694838

Family Applications (1)

Application Number Title Priority Date Filing Date
US811492A Expired - Lifetime US3573118A (en) 1968-03-29 1969-03-28 Methods and apparatus for handling wire rod

Country Status (6)

Country Link
US (1) US3573118A (en, 2012)
DE (1) DE1758070A1 (en, 2012)
ES (1) ES365386A1 (en, 2012)
GB (1) GB1259183A (en, 2012)
RO (1) RO54463A (en, 2012)
SU (1) SU364145A3 (en, 2012)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3718024A (en) * 1971-02-12 1973-02-27 Morgan Construction Co Apparatus including a fluidized bed for cooling steel rod through transformation
US3720544A (en) * 1969-03-05 1973-03-13 Wendel Sidelor Sa Soc Heat treatment of hot rolled steel wire rods
US4233830A (en) * 1978-11-14 1980-11-18 Secim Method for the continuous production of a bright copper rod by the rolling of stock obtained from a continuous casting apparatus
US4366695A (en) * 1980-08-27 1983-01-04 Westinghouse Electric Corp. Method and apparatus for heating wire prior to drawing
EP0182023A3 (en) * 1984-09-07 1987-11-11 Sumitomo Electric Industries Limited Method and apparatus for heat treatment of steel rods

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3720544A (en) * 1969-03-05 1973-03-13 Wendel Sidelor Sa Soc Heat treatment of hot rolled steel wire rods
US3718024A (en) * 1971-02-12 1973-02-27 Morgan Construction Co Apparatus including a fluidized bed for cooling steel rod through transformation
US4233830A (en) * 1978-11-14 1980-11-18 Secim Method for the continuous production of a bright copper rod by the rolling of stock obtained from a continuous casting apparatus
US4366695A (en) * 1980-08-27 1983-01-04 Westinghouse Electric Corp. Method and apparatus for heating wire prior to drawing
EP0182023A3 (en) * 1984-09-07 1987-11-11 Sumitomo Electric Industries Limited Method and apparatus for heat treatment of steel rods

Also Published As

Publication number Publication date
GB1259183A (en, 2012) 1972-01-05
RO54463A (en, 2012) 1973-05-17
SU364145A3 (en, 2012) 1972-12-25
ES365386A1 (es) 1971-03-16
DE1758070A1 (de) 1970-12-23

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