US1718806A - Rolling of band iron, hoops, and the like - Google Patents

Rolling of band iron, hoops, and the like Download PDF

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Publication number
US1718806A
US1718806A US184806A US18480627A US1718806A US 1718806 A US1718806 A US 1718806A US 184806 A US184806 A US 184806A US 18480627 A US18480627 A US 18480627A US 1718806 A US1718806 A US 1718806A
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Prior art keywords
rolling
band
heating
current
rollers
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Expired - Lifetime
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US184806A
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English (en)
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Witting Bruno
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    • 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
    • B21B45/004—Heating the product
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/30—Foil or other thin sheet-metal making or treating
    • Y10T29/301—Method

Definitions

  • This invention has reference to rolling means and it refers in particular to improvements in the rolling of band-iron, hoops and the like, either of plain or of profilated or '5 figured cross section, and is likewise adaptable to the rolling of metal bands and of similar material of plain and or profilated cross section or other metals but iron, and it is intended toincrease the facility of manipulation and the output of the product, and to generally improve the manufacturing process.
  • the brittleness and hardness of the material to be rolled has to be overcome by the repeated burning or annealing of the rolled band of material in special annealing ovens, such annealing stages being inserted between the several rolling stages.
  • This manner of procedure which admits of obtaining only limited outputs, might be greatly improved and rendered more economical, if it would be possible to roll down the band of unfinished material produced in the rolling machine to a thickness of less than only 1% millimeters, in order to thereby decrease the working profile of the cold rolling machines.
  • the admission of the current may for instance be eflected by the tapping o the secondary coil of a transformer at repeated to points, so that from the tapped portions heating currents of difi'erent strengths and preferably of a strength decreasing in the direction of the rolling operation may be fed to the different lengths of the rolled material as disposed between the respective pairs of electrodes.
  • rollers that is to say to provide them with ribs, flutings or with point-ed sections, so as to insure the highest possible uniformity of the admission .7 of the current and the greatest intensity thereof.
  • the heatin and annealing-of the material to be ro led may also be effected by means of eddy currents produced by high frequency alternating currents.
  • the generation of the eddy current is preferably eifected in air transformers without iron cores.
  • a mufile of refractory material may be disposed between two roller scaflolds of usual construction, around which a coil of conducting material and fed with high frequency alternating current is substantially concentrically arranged the field of force of which causes the heating to the glowing temperature of the material to be rolled and introduced intothe interior of the mufll'e and kept continuously in motion,
  • Fig. 1 is a diagram in front View of the arrangement of a rolling mill with heating means in front thereof;
  • Fig. 2 is a diagram showing the electric connections of the circuit used for this purpose;
  • Fig. 3 is another diagram of the general arrangement of the circuit;
  • Fig. illustrates an electrode for the admission of the current to the material to be rolled and having the general shape of a profilated roller;
  • Fig. 5 illustrates a preferred way of mounting the roller elec-' trode;
  • Fig. 1 is a diagram in front View of the arrangement of a rolling mill with heating means in front thereof;
  • Fig. 2 is a diagram showing the electric connections of the circuit used for this purpose;
  • Fig. 3 is another diagram of the general arrangement of the circuit;
  • Fig. illustrates an electrode for the admission of the current to the material to be rolled and having the general shape of a profilated roller;
  • Fig. 5 illustrates a preferred way of mounting the roller elec-' trode;
  • Fig. 7 is a diagram illustrating a device for the automatic control of the current strength
  • Fig. 8 shows diagrammatically an embodiment of means for the automatic regulation of the current and of the temperature produced.
  • a cold rolling machine a ofwellknown construction is combined with a heating apparatus disposed in front thereof with relation to the passage of the material. Both devices may be supported each on a separate base or they may be combined in any suitable manner, so as to constitute a unitary whole.
  • this heating apparatus the otherwise well-known procedure is most advantageously carried out according to which a piece of work of iron or other metal of a certain cross section and introduced between the two terminals of a dynamo machine is immediately heated upon the switching into circuit of the electric current.
  • the mode of operation of the heating apparatus is substantially as follows: Through the primary winding h an electric current of ordinary voltage is caused to flow which in the secondary winding 0 induces a current of low voltage but of high intensity which latter current is conducted to the terminals e and 7 which for the purposes of the invention constitute roller electrodes.
  • the current traverses the iron band 9 which is forced by the. pressure. rollers d against the electrodes and constitutes the shortest way between the terminals 6 and f, and by this the particular degrees of temperature which may be adjusted by special regulating and controlling means.
  • a plurality of pairs of electrodes serving for the admission and the discharge of the current are serially arranged and are fed by separate sources of current, such as for instance transformers; the band of iron 9' ( Figures 1 and 2) on its way from the reel or the like, not shown, to the rolling machine a passes successively through the pairs of electrodes under the action of the pressure rollersd.
  • the iron band which, so to speak, has been pro-heated between the first pair of electrodes 6 is-made to pass on to the next and higher heating zone and thus in succession, until the band between the .rolling method according to this invention which presents the additional advantage of doing away with the necessity of burning the rolled iron band between the several stages the method according to this invention pic I sents the great advantage of maintaining the heating apparatus continuously in proper operating condition, so as to produce sharply defined temperatures in the several heating zones, while on the other hand the blistering of the iron band and consequently the formation of cinders and slags are excluded.
  • the pos ibility of maintaining certain sharply defined temperatures renders the invention particularly adapted for the finishing rolling of bands, profiles, channel irons, pipes or the like from other metals but iron in the working of which the success of the treatment would be annihilated by the exceeding of the critical rolling temperatures.
  • the absolutely uniform heating of the unfinished metallic piece of work, the facility and reliability of the regulation of the temperatures in accordance with the method of the invention obviate the liability of any injurious overheating of the metals to be submitted to the further treatment.
  • Fi 3 2' indicates the secondary coil of a trans ormer the primary coil of which is not indicated, in order to avoidcomplication.
  • the secondary coil 71 is tapped at is, Z
  • the end is of this second-' ary coil 71 is connected to the contact roller 0 and the other end n of the secondary coil z' is connected to the contact roller 0 and the band to be heated is moved in the direction of rollers 0 0 the roller 0 being arranged directly in front of the finishing rolling device.
  • the secondary coil 6 is also tapped at Z and m and the tapped shunts are cono 0 0 0 bear the ratio 6:3:1, so that for instance 9 kw. is fed to the length 0 0 while 4, 5 kw. is admitted to the section o 0 and 1, 5 kw. is admitted to the section o,,0
  • section 0 0 is traversed by a current of 600 amps
  • the electrode employed for the admission, of the electric current as indicated diagrammatically in Figures 1 and 3 of [the In order to arrive at a perfect and complete saturation of the drawing may be in the shape of ordinary smooth rollers or rolls.
  • an additional rolling scaffold g' may be disposed infront of the electrodes 0. as indicated in Fig. 5, by meansof which the rolled material is admitted to the main rolling scafiold a at the required rate, so that neither a tensional strain nor a pressure will be produced between the two rolling scaffolds in the rolled material.
  • Intlus ligure:-o and s are the two bearing sockets of a pair of contact-rollers or rolls.
  • socket bearing 8 is arranged in the journal body t, so as to be displaceablein the direction of the arrow u, and its displacement is limited, by the screw '0.
  • the adjustment of the socket bearing .9 by means of the screw 'v a is effected in such a manner that the center 411 of the upper bearing socket 8 is somewhat staggered with relation to the center w of the lower bearing 1', and in the direction of the passage of the metal band as. This direction of the passage of the material is indicated by the arrow 3 If the metal band is moving in the direction of the arrow, it will carry the upper roller which will, of course, first assume such a position that its center axis is disposed vertically above the center axis of the lower roller along with it in the direction of its path.
  • the screw instead of operating upon the bearing socket smay of course be made to act directly upon the shaft of the roller. It should be understood that this manner of adjustment is provided .at both ends ofthe roller.
  • the material S to be rolled is conducted through the heating mufile M to the pressure rollers A and A
  • the heating muflle M which may consist of refractory clay or similar material is surrounded by the high frequency coil P
  • a another muffle M is arranged in which the material which has been formed by the pressure rollers is subjected to an annealing process, in order to eliminate the brittleness and the other changes of physical qualities -of the rolled material occurrlng during the rolling operation.
  • the muflie M is likewise surrounded by a concentrically disposed coil P5 which may.
  • l is a selenium cell upon which by means of a lens 2 the light of the glowing color of the metal 3 to be heated is projected.
  • the source of current feeds the two circuits 4 and 4
  • the circuit 4 contains the electromagnet 5 and the circuit 4., contains the electromagnet 5
  • the iron cores 6 and 6 are respectively arranged which are suspended from the ends of a chain 8 passing by way of the sprocket rollers 7 and 7,,.
  • the contact race 9 is provided at the contacts of which tapped branch conduits of a regulating and controlling transformer not shown in the drawing are caused to terminate.
  • the contact slide 10 which is secured to the chai 8 is adapted to slide.
  • the selenium cell 1 is included in the circuit 4 of the electromagnet 5,, while in the circuit 4., of the electromagnet 5 a manually adjustable resistance 11 is included.
  • the device By the adjustment of the selenium cell 1 or by the adjustment of the resistance 11 the device will be set in such a manner that at a certain color of the hot glowing material, thus for instance at bright red heat, the two electromagnets 5 and 5,, will counterbalance each other.
  • the contact 10 are displaced and by this means a certain amount of convolutions of the secondary coil of a transformer which furnishes the heating current are cut out, if as an instance a number of tapped conduits of a transformer, say nine of such conduits, are connected to the contacts of the contact race as above set forth, and it becomes pos-.
  • the method of effecting the finishing rolling of substantially band-shaped and similar metallic material which consists in first rolling the material substantially to the desired cross sectional shape, cooling it, then submitting it to the successive action of different amounts of electric energy, while keeping the material in motion, thereby gradually re-heating the material and finally submitting it to finlshing rolling.
  • the method of effecting the finishing rolling of substantially band-shaped and similar metallic material which consists in first rolling the material to substantially the desired cross sectional shape, allowing it to cool, moving it in the axial direction and inserting it in the secondary circuit of a step-down alternating current transformer while in motion, and finally submitting it to finishing rolling.
  • T e method of effecting the finishin rolling of substantially band-shaped an similar metallic material which consists in first rolling the material to substantially the desired cross sectional shape, moving it in the axial direction, allowing it to cool, and passing it in contact with spacedly disposed electric electrodes, including some of such electrodes in an electric circuit, tapping said circuit at certain adjustable points, connecting said points with the other electrodes in multiple connection, passing an electric current through said circuits and said multiple connection and finally submitting the thus re-heated material to finishing rolling.
  • preliminary rolling means and finishing rolling means spaced therefrom, a lurality of electric electrodes spacedly disposed intermediate the rolling means, an electric circuit on such electrodes, a controlling circuit connected to the other spacedly disposed electrical electrodes formaking contact with the material to be rolled comprising means cooperating with the electrodes and intermediate said rolling means and an electric circuitconnected to said electrodes.
  • a plurality of electrodes spacedly disposed intermediate the rolling means, an electric circuit connected to said electrode, a contacting cir-. cuit cooperating therewith, a selenium cell in the controlling circuit adapted for 1 irradiation and responsive to the color of the in combination preliminary rolling means and finishing rolling means spacedly disposed from .each other for rolling band shaped and. similar material, conveying rollers spacedly disposed from the 'rolling means, electric heating means disposed be- 3 tween the conveying rollers and the rolling means, and heating coils surrounding said heating means.
  • a plurality of 10 spacedly disposed electrical electrode rollers for making contact with the material to be rolled, said rollers having an outer periphery adapted to make a plurality of contacts, comprising means cooperating With the electrodes and intermediate said rolling means, and an electric circuit connected to said electrode.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • General Induction Heating (AREA)
US184806A 1926-04-23 1927-04-18 Rolling of band iron, hoops, and the like Expired - Lifetime US1718806A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1718806X 1926-04-23

Publications (1)

Publication Number Publication Date
US1718806A true US1718806A (en) 1929-06-25

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US184806A Expired - Lifetime US1718806A (en) 1926-04-23 1927-04-18 Rolling of band iron, hoops, and the like

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US (1) US1718806A (enrdf_load_stackoverflow)
BE (1) BE341159A (enrdf_load_stackoverflow)
DE (1) DE481741C (enrdf_load_stackoverflow)
FR (1) FR633077A (enrdf_load_stackoverflow)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2420377A (en) * 1943-01-06 1947-05-13 Carl G Jones Method of brightening tinned strip
US2457179A (en) * 1945-09-18 1948-12-28 Ronay Bela Coreless induction heater and method of making same
US2457870A (en) * 1946-05-31 1949-01-04 Cook John Three-phase electric resistance wire heating apparatus
US2479353A (en) * 1943-11-01 1949-08-16 Rca Corp Device for reducing thickness of thin sheet material
US2529689A (en) * 1944-03-23 1950-11-14 Selas Corp Of America Process of heat-treating metal work of elongated extent
US2658982A (en) * 1952-02-19 1953-11-10 United States Steel Corp Heating circuit and method
US2901932A (en) * 1953-04-10 1959-09-01 Erdelyi Ferenc Method and apparatus for manufacturing tools with a rotational operating movement by rolling
US2952574A (en) * 1956-05-01 1960-09-13 United States Steel Corp Method of making oil well cable
US3180024A (en) * 1961-02-13 1965-04-27 Crucible Steel Co America Metal working process and apparatus
US3344648A (en) * 1963-11-19 1967-10-03 United Eng Foundry Co Method and apparatus for controlling the temperature of hot strip
US4765169A (en) * 1987-11-02 1988-08-23 The Monarch Machine Tool Co. Method of tension leveling nonhomogeneous metal sheet
US20070193322A1 (en) * 2006-02-17 2007-08-23 Beck William J Application of induction heating to control sheet flatness in cold rolling mills
US10875064B2 (en) * 2015-07-07 2020-12-29 Baoshan Iron & Steel Co., Ltd. Rolling mill
US20220097111A1 (en) * 2020-09-25 2022-03-31 Taiyuan University Of Technology Plate and strip rolling process oriented efficient and stable current applying manipulator and method thereof

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2420377A (en) * 1943-01-06 1947-05-13 Carl G Jones Method of brightening tinned strip
US2479353A (en) * 1943-11-01 1949-08-16 Rca Corp Device for reducing thickness of thin sheet material
US2529689A (en) * 1944-03-23 1950-11-14 Selas Corp Of America Process of heat-treating metal work of elongated extent
US2457179A (en) * 1945-09-18 1948-12-28 Ronay Bela Coreless induction heater and method of making same
US2457870A (en) * 1946-05-31 1949-01-04 Cook John Three-phase electric resistance wire heating apparatus
US2658982A (en) * 1952-02-19 1953-11-10 United States Steel Corp Heating circuit and method
US2901932A (en) * 1953-04-10 1959-09-01 Erdelyi Ferenc Method and apparatus for manufacturing tools with a rotational operating movement by rolling
US2952574A (en) * 1956-05-01 1960-09-13 United States Steel Corp Method of making oil well cable
US3180024A (en) * 1961-02-13 1965-04-27 Crucible Steel Co America Metal working process and apparatus
US3344648A (en) * 1963-11-19 1967-10-03 United Eng Foundry Co Method and apparatus for controlling the temperature of hot strip
US4765169A (en) * 1987-11-02 1988-08-23 The Monarch Machine Tool Co. Method of tension leveling nonhomogeneous metal sheet
US20070193322A1 (en) * 2006-02-17 2007-08-23 Beck William J Application of induction heating to control sheet flatness in cold rolling mills
US10875064B2 (en) * 2015-07-07 2020-12-29 Baoshan Iron & Steel Co., Ltd. Rolling mill
US20220097111A1 (en) * 2020-09-25 2022-03-31 Taiyuan University Of Technology Plate and strip rolling process oriented efficient and stable current applying manipulator and method thereof

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Publication number Publication date
DE481741C (de) 1929-08-28
BE341159A (enrdf_load_stackoverflow)
FR633077A (fr) 1928-01-20

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