US3268998A - Method for forming steel strip into loose coil - Google Patents

Method for forming steel strip into loose coil Download PDF

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US3268998A
US3268998A US395771A US39577164A US3268998A US 3268998 A US3268998 A US 3268998A US 395771 A US395771 A US 395771A US 39577164 A US39577164 A US 39577164A US 3268998 A US3268998 A US 3268998A
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coil
strip
loose
steel
spires
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US395771A
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Urushiyama Nobuo
Motomura Tetsuo
Koshiishi Hiromichi
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Yawata Iron and Steel Co Ltd
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Yawata Iron and Steel Co Ltd
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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
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/26—Special arrangements with regard to simultaneous or subsequent treatment of the material
    • 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
    • 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
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49789—Obtaining plural product pieces from unitary workpiece
    • Y10T29/49794—Dividing on common outline
    • 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
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4981—Utilizing transitory attached element or associated separate material
    • 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
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49995—Shaping one-piece blank by removing material
    • Y10T29/49996—Successive distinct removal operations

Definitions

  • This invention relates to a method for forming steel strip or band steel (herein-after called strip) into loose coil.
  • the strip to be heattreated is, in most cases, coiled and then put in a heat treatment furnace.
  • the strip to undergo heat treatment is shaped into loose coil so that any adjacent laps of the coil may not be in close contact with each other.
  • the wire, nylon rope, or the like thus Wound in the coil is usually pulled out prior to heat treatment, or, in case the wound material does not burn, the coil is heat-treated with the spacer, and then, at the time of recoiling, the spacer is removed.
  • the coil thus formed must be handled with care so that the laps do not shift and also strict care must be taken of the coil to stay cylindrical during keeping and not to warp out of shape. Moreover, in the formation of a loose coil as mentioned above, the necessity of a special complicated device and other various inconveniences are inevitable.
  • An object of this invention is to eliminate the abovementioned defect, and aims to facilitate extremely the formation of strip into loose coil by winding bands of an inflammable material, such as paper tapes, between the laps of the coil of strip simultaneously with the coiling process, and then heating the coil in an oxidising atmosphere to burn away the bands of the inflammable material wound between the laps of the coil of strip.
  • an inflammable material such as paper tapes
  • Another object of this invention is to provide a process for easy formation of strip into loose coil by utilizing the usually used take-up motion and the like as they are, without the conventional special loose-coil shaping apparatus.
  • a further object of this invention is to provide a loose coil of strip which can be handled as easily as an ordinary tight coil with no necessity of any such special care as needed in the handling of the prior loose coil.
  • FIG. 1 is a side view showing the formation of a loose coil of this invention by means of up coilers.
  • FIG. 2 is the plane view showing the same formation as FIG. 1.
  • FIG. 3 is a side view that illustrates the loose-coil formation of the present invention by the use of a tension reel.
  • a loose coil can be coiled by 3,253,998 Patented August 30, 1966 an ordinary coiler and that with the coil axis in the horizontal direction.
  • the coil axis may be in the vertical direction as at the time of the conventional formation of a loose coil, or may be inclined.
  • the possibility of setting the coil axis in the horizontal direction in the loose-coil formation of the present invention gives rise to such advantages as to facilitate the formation of strip into loose coil which has so far been regarded as diffi-cult and further to allow the coil effective heat treatment.
  • the loose-coil forming process of this invention may employ either of the shaft-winding system which utilizes a tension reel or the like and the up coiler system which makes use of bending rollers, thus, in effect, being applicable to any type of apparatus that is capable of coiling strip.
  • This invention contemplates to coil strip together with inflammable tapes of paper or another materialso that a loose coil may be formed.
  • the tapes are wound between the laps of the coil of strip at the same time with the coiling, and the inflammable matter should be such a material as paper or another plant fiber which may be burnt up without producing any, especially sticky, residue. This is because the sticking of the remainder to the strip after the combustion of the matter interposed in the loose coil of strip shaped in accordance with the present invention may cause troubles in the subsequent treating processes, such as contamination of the cleaning solution in the washing process.
  • the material of the tapes need :not be strictly limited to plant fiber but may be another substance, though it is most desirable that the burning; of the spacer does not give rise to any remainder.
  • the positions where the spacers are placed during the laps according to this invention are most preferably the trimming parts on both sides of the strip; however, spacing at other positions is also possible. In such a case as stated below, however, it is advisable to avoid, to the most possible extent, the spacing at positions except the trimming parts, namely, in case the main part of the steel plate should be free from the strain due to the spacers, it is necessary to wind the spacer along the trimming parts on both sides of the strip.
  • the spacer may also be as wide as the strip all along the strip.
  • a great quantity of gas evolves at the time of the combustion of the spacer, requiring much trouble in the adjustment of the atmosphere gas in the heat treatment process following the burning process; further, this is particularly undesirable in the case of a steel that is subject to influence of carbon.
  • the shape of tape may always stabilize the matter at the spacing position; while, in the case of a twisted material such as paper string, the spacing position is apt to shift, requiring much care of winding it between the laps.
  • two or more twisted cords arranged in parallel with each other so as to be one body are good in stability.
  • the thickness or number of the spacers governs the clearance between the laps of the loose coil of strip; however, in View of the intended looseness, the thickness of more than 0.8 millimeter may be expected to bring about a good result.
  • FIGS. 1 and 2 are side view and a plan showing the application of the process for the loose-coil formation of this invention to up coilers.
  • strip S is guided by a couple of rolls 6 and 6 and another couple of rolls 5 and 5' into a bend device composed of bend rolls 2, 3 and 4, by which the strip S is bent so as to meet the desired coil diameter, and then sent to up coilers 1 and 1'.
  • coil spacer A is guided by rolls 6 and 6 so as to be positioned in the trimming parts of both sides of the strip, and, through the bend device, led to the up coilers together with the strip.
  • FIG. 3 shows another exemplary embodiment of this invention by the shaft-winding system.
  • Strip S is wound around a winding reel 7 simultaneously with the same paper tapes A as used in the embodiment of FIG. 1.
  • the winding apparatus may be set up by the simple utilization of a Winding reel.
  • the present invention has such advantage as to permit a loose coil to be formed surely and by an ordinary winding method by utilizing an extremely simple apparatus such as a winding reel.
  • a method of heat treating a strip of steel comprising the steps of placing a flammable material on the strip, rolling said strip of steel into a coil with the flammable material between the spires of the coil and spacing the spires of the coil, heating said coil to burn away the flammable material completely so as to leave a space between the spires of the coil, removing the gas produced by the burning of the flammable material from between the spires of the coil, and subjecting the coil to a heat treatment .in a heat treatment gaseous atmosphere.
  • a method as claimed in claim 1 in which the step of burning the flammable matenial comprises heating the coil with the flammable material between the spires thereof in an oxidizing atmosphere.
  • a method of heat treating a strip of steel comprising the steps of placing a flammable material on the strip, rolling said strip into a coil with the flammable material between the spires of the coil and spacing the spires of the coil, placing the coil in an annealing furnace with the axis of the coil in a vertical direction, supplying heat to the annealing furnace to burn away the flammable material completely and letting the residue fall from between the spires of the coil so that a loose coil having a space between the spires thereof remains, removing the gaseous products of combustion from the annealing furnace, and annealing the coil in the annealing furnace.
  • a method of coiling a strip of steel comprising the steps of placing a flammable material on the strip, rolling the strip into a coil with the flammable material between the spires of the coil and spacing the spires of the coil, and heating the coil and burning the flammable material completely out from between the spires of the coil.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Description

g- 3 1966 NOBUO URUSHIYAMA ETAL 33 METHOD FOR FORMING STEEL STRIP INTO LOOSE COIL Filed Sept. 11, 1964 FIG! INVENTORS Nobuo Urushiyama Tefsuo Mofomura Hiram/chi Koshiishi 5 wwawfzz, J54)! 1? WM United States Patent 3,268,998 METHUD FOR FORMING STEEL STRIP INTO LOOSE @OIL Nohuo Urushiyama, Tetsno Motornura, and Hiromichi Koshiishi, all of Kitakyushu City, Japan, assignors to Yawata Iron dz Steel (10., Ltd, Tokyo, Japan Filed Sept. 11, 1964, Ser. No. 395,771 Claims priority, application Japan, Sept. 16, 1963,
lift/49,720 8 Claims. (Cl. 29-423) This invention relates to a method for forming steel strip or band steel (herein-after called strip) into loose coil.
It has been wide practice to subject steel strip to heat treatment for various purposes. The strip to be heattreated is, in most cases, coiled and then put in a heat treatment furnace. In order to make the whole surfaces of the steel plate come into uniform contact with the annealing gas or the gas inside the heat treatment furnace, it is necessary to coilthe strip so that each lap of the coil may not be in closed contact with the inner and outer laps. For this purpose, the strip to undergo heat treatment is shaped into loose coil so that any adjacent laps of the coil may not be in close contact with each other. To form such a loose coil, it is commonly practiced to erect a tight coil and to use a special loose-coil shaping apparatus for winding wire, nylon rope, or the like in the coil on one side. However, the wire, nylon rope, or the like thus Wound in the coil is usually pulled out prior to heat treatment, or, in case the wound material does not burn, the coil is heat-treated with the spacer, and then, at the time of recoiling, the spacer is removed.
Accordingly, the coil thus formed must be handled with care so that the laps do not shift and also strict care must be taken of the coil to stay cylindrical during keeping and not to warp out of shape. Moreover, in the formation of a loose coil as mentioned above, the necessity of a special complicated device and other various inconveniences are inevitable.
An object of this invention is to eliminate the abovementioned defect, and aims to facilitate extremely the formation of strip into loose coil by winding bands of an inflammable material, such as paper tapes, between the laps of the coil of strip simultaneously with the coiling process, and then heating the coil in an oxidising atmosphere to burn away the bands of the inflammable material wound between the laps of the coil of strip.
Another object of this invention is to provide a process for easy formation of strip into loose coil by utilizing the usually used take-up motion and the like as they are, without the conventional special loose-coil shaping apparatus.
A further object of this invention is to provide a loose coil of strip which can be handled as easily as an ordinary tight coil with no necessity of any such special care as needed in the handling of the prior loose coil.
The other objects and characters of the present invention will be fully understood by reference to the appended claims and the following description taken in connection with the accompanying drawing, which shows exemplary embodiments of this invention.
FIG. 1 is a side view showing the formation of a loose coil of this invention by means of up coilers.
FIG. 2 is the plane view showing the same formation as FIG. 1.
FIG. 3 is a side view that illustrates the loose-coil formation of the present invention by the use of a tension reel.
This invention will be detailed hereunder. According to the present invention, a loose coil can be coiled by 3,253,998 Patented August 30, 1966 an ordinary coiler and that with the coil axis in the horizontal direction. However, the coil axis may be in the vertical direction as at the time of the conventional formation of a loose coil, or may be inclined. The possibility of setting the coil axis in the horizontal direction in the loose-coil formation of the present invention gives rise to such advantages as to facilitate the formation of strip into loose coil which has so far been regarded as diffi-cult and further to allow the coil effective heat treatment.
Besides, the loose-coil forming process of this invention may employ either of the shaft-winding system which utilizes a tension reel or the like and the up coiler system which makes use of bending rollers, thus, in effect, being applicable to any type of apparatus that is capable of coiling strip.
This invention contemplates to coil strip together with inflammable tapes of paper or another materialso that a loose coil may be formed. The tapes are wound between the laps of the coil of strip at the same time with the coiling, and the inflammable matter should be such a material as paper or another plant fiber which may be burnt up without producing any, especially sticky, residue. This is because the sticking of the remainder to the strip after the combustion of the matter interposed in the loose coil of strip shaped in accordance with the present invention may cause troubles in the subsequent treating processes, such as contamination of the cleaning solution in the washing process. In case, however, the residue after the burning of the spacers is not sticky, or easily falls off, or can be removed by means of a simple wiper or the like, the material of the tapes need :not be strictly limited to plant fiber but may be another substance, though it is most desirable that the burning; of the spacer does not give rise to any remainder.
The positions where the spacers are placed during the laps according to this invention are most preferably the trimming parts on both sides of the strip; however, spacing at other positions is also possible. In such a case as stated below, however, it is advisable to avoid, to the most possible extent, the spacing at positions except the trimming parts, namely, in case the main part of the steel plate should be free from the strain due to the spacers, it is necessary to wind the spacer along the trimming parts on both sides of the strip.
Besides, in case, as mentioned above, the main body of the steel plate should be free from the strain due to the spacer, the spacer may also be as wide as the strip all along the strip. In this case, however, a great quantity of gas evolves at the time of the combustion of the spacer, requiring much trouble in the adjustment of the atmosphere gas in the heat treatment process following the burning process; further, this is particularly undesirable in the case of a steel that is subject to influence of carbon.
As to the shape of the spacer in an embodiment of the present invention, the shape of tape may always stabilize the matter at the spacing position; while, in the case of a twisted material such as paper string, the spacing position is apt to shift, requiring much care of winding it between the laps. However, two or more twisted cords arranged in parallel with each other so as to be one body are good in stability. Besides, the thickness or number of the spacers governs the clearance between the laps of the loose coil of strip; however, in View of the intended looseness, the thickness of more than 0.8 millimeter may be expected to bring about a good result.
Next, two exemplary embodiments of this invention will be explained in connection with the accompanying drawing.
FIGS. 1 and 2 are side view and a plan showing the application of the process for the loose-coil formation of this invention to up coilers. In both figures, strip S is guided by a couple of rolls 6 and 6 and another couple of rolls 5 and 5' into a bend device composed of bend rolls 2, 3 and 4, by which the strip S is bent so as to meet the desired coil diameter, and then sent to up coilers 1 and 1'. On the other hand, coil spacer A is guided by rolls 6 and 6 so as to be positioned in the trimming parts of both sides of the strip, and, through the bend device, led to the up coilers together with the strip. In this embodiment, paper tapes having a thickness of 0.13 to 26 millimeters are employed as the spacer A and steel strip having a thickness of 0.5 to 3 millimeters are employed as the strip S. Our tests showed best results in case of the tapes having a thickness of 1 millimeter. FIG. 3 shows another exemplary embodiment of this invention by the shaft-winding system. Strip S is wound around a winding reel 7 simultaneously with the same paper tapes A as used in the embodiment of FIG. 1. In the case of the employment of the shaft- Winding system for embodying this invention, the winding apparatus may be set up by the simple utilization of a Winding reel.
When the loose coil thus formed was heated and the paper tape-s as spacer were burnt, the coil was found to become a perfect loose coil and no ash was attached to the strip. The gas produced during the combustion of the paper tapes is suctioned, and the atmosphere gas in the burning process is completely driven away after the burning, for providing an atmosphere necessary for the heat treatment process.
As apparent from the foregoing description, the present invention has such advantage as to permit a loose coil to be formed surely and by an ordinary winding method by utilizing an extremely simple apparatus such as a winding reel.
What we claim is:
1. A method of heat treating a strip of steel, comprising the steps of placing a flammable material on the strip, rolling said strip of steel into a coil with the flammable material between the spires of the coil and spacing the spires of the coil, heating said coil to burn away the flammable material completely so as to leave a space between the spires of the coil, removing the gas produced by the burning of the flammable material from between the spires of the coil, and subjecting the coil to a heat treatment .in a heat treatment gaseous atmosphere.
2. A method as claimed in claim 1 in which said strip of steel and the flammable material are coiled about a horizontal axis.
3. A method as claimed in claim 1 in which the step of burning the flammable matenial comprises heating the coil with the flammable material between the spires thereof in an oxidizing atmosphere.
4. A method as claimed in claim 1 in which the flammable material is a material which leaves no residue on the surfaces of the strip of steel when it has burned.
5. A method as claimed in claim 1 in which the flammable material is in two lengths, one lying along the strip of steel adjacent one edge and the other lying along the strip of steel adjacent the other edge, said lengths being substantially parallel with each other.
6. A method of heat treating a strip of steel, comprising the steps of placing a flammable material on the strip, rolling said strip into a coil with the flammable material between the spires of the coil and spacing the spires of the coil, placing the coil in an annealing furnace with the axis of the coil in a vertical direction, supplying heat to the annealing furnace to burn away the flammable material completely and letting the residue fall from between the spires of the coil so that a loose coil having a space between the spires thereof remains, removing the gaseous products of combustion from the annealing furnace, and annealing the coil in the annealing furnace.
7. A method of coiling a strip of steel, comprising the steps of placing a flammable material on the strip, rolling the strip into a coil with the flammable material between the spires of the coil and spacing the spires of the coil, and heating the coil and burning the flammable material completely out from between the spires of the coil.
8. A method of coiling strip steel as claimed in claim 7 in which the flammable material is in two lengths, one lying along the strip of steel adjacent one edge and the other lying along the strip adjacent the other edge, said lengths being substantially parallel with each other.
References Cited by the Examiner UNITED STATES PATENTS 1,296,934 3/1919 Drouilly 29423 X 1,994,767 3/1935 Heintz 29423 2,075,815 4/1937 Knox 29173 2,386,823 10/1945 Thornburgh 29400 2,932,884 4/1960 Lyon 29423 JOHN F. CAMPBELL, Primary Examiner.
THOMAS H. EAGER, Examiner.

Claims (1)

1. A METHOD OF HEAT TREATING A STRIP OF STEEL, COMPRISING THE STEPS OF PLACING A FLAMMABLE MATERIAL ON THE STRIP, ROLLING SAID STRIP OF STEEL INTO A COIL WITH THE FLAMMABLE MATERIAL BETWEEN THE SPIRES OF THE COIL AND SPACING THE SPIRES OF THE COIL, HEATING SAID COIL TO BURN AWAY THE FLAMMABLE MATERIAL COMPLETELY SO AS TO LEAVE A SPACE BETWEEN THE SPIRES OF THE COIL, REMOVING THE GAS PRODUCED BY THE BURNING OF THE FLAMMABLE MATERIAL FROM BETWEEN THE SPIRES OF THE COIL AND SUBJECTING THE COIL TO A HEAT TREATMENT IN A HEAT TREATMENT GASEOUS ATMOSPHERE.
US395771A 1963-09-16 1964-09-11 Method for forming steel strip into loose coil Expired - Lifetime US3268998A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3648350A (en) * 1968-08-19 1972-03-14 Tracor Method of forming coil packages of metal foil strips
US9388017B1 (en) 2015-02-06 2016-07-12 Clifton E. Wolf Accumulator reel for strip steel used to manufacture coiled tubing

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1296934A (en) * 1914-04-21 1919-03-11 Eugene Drouilly Process for cutting and piling up thin aluminium sheets.
US1994767A (en) * 1934-06-27 1935-03-19 Heintz & Kaufman Ltd Method of making inductances
US2075815A (en) * 1934-09-29 1937-04-06 Harry A Knox Method of forming a volute spring
US2386823A (en) * 1943-12-03 1945-10-16 American Can Co Method of preparing tubing for transportation
US2932884A (en) * 1955-03-28 1960-04-19 Lyon George Albert Method of providing bomb head shells with drop ring sockets

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1296934A (en) * 1914-04-21 1919-03-11 Eugene Drouilly Process for cutting and piling up thin aluminium sheets.
US1994767A (en) * 1934-06-27 1935-03-19 Heintz & Kaufman Ltd Method of making inductances
US2075815A (en) * 1934-09-29 1937-04-06 Harry A Knox Method of forming a volute spring
US2386823A (en) * 1943-12-03 1945-10-16 American Can Co Method of preparing tubing for transportation
US2932884A (en) * 1955-03-28 1960-04-19 Lyon George Albert Method of providing bomb head shells with drop ring sockets

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3648350A (en) * 1968-08-19 1972-03-14 Tracor Method of forming coil packages of metal foil strips
US9388017B1 (en) 2015-02-06 2016-07-12 Clifton E. Wolf Accumulator reel for strip steel used to manufacture coiled tubing

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