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Method of straightening and coating wire

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Publication number
US2511274A
US2511274A US66126846A US2511274A US 2511274 A US2511274 A US 2511274A US 66126846 A US66126846 A US 66126846A US 2511274 A US2511274 A US 2511274A
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Prior art keywords
wire
straightening
straightness
invention
elastic
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Kramer John
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American Steel and Wire Co of New Jersey
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American Steel and Wire Co of New Jersey
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C19/00Devices for straightening wire or like work combined with or specially adapted for use in connection with drawing or winding machines or apparatus
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/04Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
    • B21C37/042Manufacture of coated wire or bars
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21FWORKING OR PROCESSING OF METAL WIRE
    • B21F1/00Bending wire other than coiling; Straightening wire
    • B21F1/02Straightening
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHER TREATMENTS
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/06Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C2/00Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/08Tin or alloys based thereon
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C2/00Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/34Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
    • C23C2/36Elongated material
    • C23C2/38Wires; Tubes

Description

June 13,1950 I J. KRAMER METHOD OF STRAIGHTENING AND COATING WIRE Filed April 11, 1946 INVENTORY Jay/v Kw/ 45e, Angl a/ Hi5 ATTORNEY.

Patented June 13, 1950 METHOD OF STRAIGHTENING AND COATING WIRE John Kramer, Waukegan, Ill., assignor to The American Steel and Wire Company of New Jersey, a corporation of New Jersey Application April 11, 1946, Serial No. 661,268

1 Claim. 1

The present invention relates to an improved method of manufacturing wire to insure that hard drawn wire will return to substantial straightness after having been coiled. While not limited thereto, the invention is well suited for use in the production of tirmed hard drawn w1re.

Practical requirements and specifications for hard drawn wire which will lie straight when uncoiled have been extremely difiicult if not impossible to meet by the methods and procedures heretofore known to those skilled in the art. The standard method of straightening the wire at the blocks does not produce satisfactory results, since the operation of straightening hard drawn wire by passing it through rolls or their equivalents effects a drop in tensile strength and develops the lowest elastic limit possible at this tensile strength level for the wire. As a result of prior practice, therefore, the wire is in its least favorable condition for rewinding on blocks without harming its straightness.

One object of my invention is to overcome the inherent deficiencies of prior practice. A further object is to provide a novel sequence of steps whereby the tensile strength and elastic limit and particularly, the elastic ratio of the wire will be increased so as to improve the condition of the wire without impairing the straightness imparted thereto by a previous straightening step.

The above and other related features of the invention will be fully apparent after consideration of the following detailed disclosure, the accompanying drawings, and the appended claims.

In the drawings:

Figure 1 is a plan view illustrating a suitable layout of apparatus for practice of the herein claimed method.

Figure 2 is an enlarged detail of the wire straightener of Figure 1.

Figure 3 is an end view illustrating means for tilting the straightener rolls.

Referring in detail to the drawings, reference numeral l designates a length of wire in the act of being drawn through a wire drawing die I2 by tension applied by a conventional form of wire drawing block H! which is adapted to be rotated by any suitable source of power, in a manner well known to those skilled in the art.

In the normal operation of the wire drawing block 14, a considerable quantity of drawn wire accumulates thereon, and the act of coiling the wire around the block imparts to the wire an inherent curvature called a cast by wire manufacturers, since it will not lie straight when unwound from the block. Under my invention I aim to overcome such inherent tendency, and I accomplish a definite benefit in straightness of the product by following the improved method hereinafter more fully described and claimed.

After a desired batch of wire has accumulated on the drawing block 14, the free end is led through a guide hole 16 in a member 18, and makes approximately a quarter turn around a guide sheave 20, thence passes through a guide hole 22 formed in a member 24. Upon emergence from the guide hole 22, the wire traverses an undulating pass defined by two sets of straightening rolls 26-26, the axis of rotation of the rolls of one set being staggered or offset with respect to that of an opposing set, as shown. After being acted upon by the straightener rolls, the wire passes through guide hole 28 formed in a member 30.

An essential and important feature of my herein claimed invention is that the wire is subjected to a heating step after the straightening operation. While not limited to such a method, the heating step can be conveniently effected by passing the wire directly from the straightener rolls through a molten bath of tin such as indicated at 32, contained in a conventional form of tin pot 34. After passing through the tin pot, the wire is wound up and accumulated on a block 36 driven by any source of power, in a manner well known and therefore not illustrated in detail. By passing the wire through the hot tin bath immediately after straightening, a beneficial change in the properties is developed which represents the maximum change in properties usually desired in tinned hard drawn wire. In order to secure straightness of an untinned wire, substantially the same method steps will be followed except that for the tin bath I substitute a heating medium such as oil or salts. I regard it as important to subject the straightened wire to a temperature of from 200 F. to 650 F., and this temperature range is readily attainable through the choice of proper heating medium. The lower temperatures will minimize the changes in tensile and torsional properties while still aiding to preserve the straightness developed by the rolls 26 which define the undulating pass. The principles of the invention are applicable to either ferrous or non-ferrous wire which has hardening characteristics in the range of 200 F. to 650 F., which will increase the elastic limit. The straightener used will preferably be so constructed that it can be tilted with respect to the axis of the wire, and for this purpose tilting screws 38 are employed which are effective to vary the angular position of the plate 40 which carries the bearing for supporting the straightener rolls 26. By this means any oficast of the wire in the coil coming from the reel M can be compensated for, and the resulting product will be found to be perfectly straight.

The novelty of my invention is based largely on a recognition of the fact that the temperature efiect following the straightening step raises the elastic limit of the product such that the straightness developed in the straightener is set, thus permitting the wire to be wound into a coil without seriously impairing the straightness previously developed. The invention also recognizes the fact that straightening operations reduce tensile strength and elastic limit and particularly the elastic ratio and that because of this it is difficult by prior practices to rewind wire on a take-up block without in part destroying the maximum straightness developed by wire straightening. By following my improved practice involving heating the wire subsequent to straightening, the quality of straightness is set or fixed by virtue of the increase in tensile strength and elastic limit and particularly the increase in the elastic limit to tensile strength ratio. The element of time in heat treatment after straightening is important, and the required measure of time can be determined by tensile and elastic limit tests in the lower portion of the temperature range specified. Practice has demonstrated, for example, that wire of 0.072" gauge, after being straightened, can satisfactorily have its straightness set by subjecting it to heat within the specified critical temperature range for a minimum period of one-half a second.

Having thus described my invention, what I wish to secure by Letters Patent is defined in the appended claim.

I claim:

In the manufacture of coiled hard-drawn tinned ferrous wire, wherein after being drawn the wire is coiled and thereby receives a curved set, a method of producing a straight set in the wire which comprises passing the wire through an undulating straightening course, heating and coating the wire immediately thereafter by passing the wire through a molten tin bath at a maximum temperature of 650 F. for a suflicient period of time for the wire to attain the bath temperature, and re-coiling the wire, the re-coiled wire having a straight set when uncoiled.

JOHN KRAMER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 182,468 Paine Sept. 19, 1876 1,522,265 Peacock Jan. 6, 1925 1,667,476 Kelley Apr. 24, 1928 2,165,368 Goss July 11, 1939

US2511274A 1946-04-11 1946-04-11 Method of straightening and coating wire Expired - Lifetime US2511274A (en)

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2997076A (en) * 1955-09-30 1961-08-22 Gen Electric Coil winding machine
US3012310A (en) * 1955-10-28 1961-12-12 Colorado Fuel & Iron Corp Bridge wire and method of making same
US3231665A (en) * 1962-09-18 1966-01-25 United States Steel Corp Stress-relieved stranded wire structure and method of making the same
US3284892A (en) * 1963-09-25 1966-11-15 Anaconda American Brass Co Wire processing
US3286499A (en) * 1963-11-12 1966-11-22 United States Steel Corp Apparatus for coiling wire
US3360016A (en) * 1965-01-06 1967-12-26 Etiwanda Steel Producers Inc Rewinding process and apparatus
US3391450A (en) * 1965-03-04 1968-07-09 Advanced Wyrepak Company Inc Process for treating wire
US3424208A (en) * 1966-07-05 1969-01-28 Raymond A Heisler Wire handling apparatus
US3541832A (en) * 1968-10-21 1970-11-24 Torrington Mfg Co Metal forming machine and wire preheating apparatus
US4335758A (en) * 1979-06-11 1982-06-22 George Koch Sons, Inc. Apparatus for advancing and forming a wire
US4514237A (en) * 1983-01-17 1985-04-30 Olaf Nigol Method of heat treating steel wire
US4612063A (en) * 1984-07-13 1986-09-16 Acme Fence And Iron Company, Inc. Method of making a fence stretcher bar
US4949567A (en) * 1988-11-04 1990-08-21 Corbin Edward W Apparatus and method for control of wire cast and helix
US20050016244A1 (en) * 2003-05-20 2005-01-27 Rainer Hergemoller Method for processing drawn material and drawn material production installation
US20120111991A1 (en) * 2009-06-03 2012-05-10 Bridgestone Corporation Wire winding-off auxiliary device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US182468A (en) * 1876-09-19 Improvement in straightening iron and steel wire
US1522265A (en) * 1923-12-17 1925-01-06 Wheeling Steel & Iron Company Process of straightening and coating wire
US1667476A (en) * 1926-09-14 1928-04-24 Budd Wheel Co Method of increasing the elasticity of metal articles
US2165368A (en) * 1936-02-20 1939-07-11 Cold Metal Process Co Sheet metal and method of manufacture

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US182468A (en) * 1876-09-19 Improvement in straightening iron and steel wire
US1522265A (en) * 1923-12-17 1925-01-06 Wheeling Steel & Iron Company Process of straightening and coating wire
US1667476A (en) * 1926-09-14 1928-04-24 Budd Wheel Co Method of increasing the elasticity of metal articles
US2165368A (en) * 1936-02-20 1939-07-11 Cold Metal Process Co Sheet metal and method of manufacture

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2997076A (en) * 1955-09-30 1961-08-22 Gen Electric Coil winding machine
US3012310A (en) * 1955-10-28 1961-12-12 Colorado Fuel & Iron Corp Bridge wire and method of making same
US3231665A (en) * 1962-09-18 1966-01-25 United States Steel Corp Stress-relieved stranded wire structure and method of making the same
US3284892A (en) * 1963-09-25 1966-11-15 Anaconda American Brass Co Wire processing
US3286499A (en) * 1963-11-12 1966-11-22 United States Steel Corp Apparatus for coiling wire
US3360016A (en) * 1965-01-06 1967-12-26 Etiwanda Steel Producers Inc Rewinding process and apparatus
US3391450A (en) * 1965-03-04 1968-07-09 Advanced Wyrepak Company Inc Process for treating wire
US3424208A (en) * 1966-07-05 1969-01-28 Raymond A Heisler Wire handling apparatus
US3541832A (en) * 1968-10-21 1970-11-24 Torrington Mfg Co Metal forming machine and wire preheating apparatus
US4335758A (en) * 1979-06-11 1982-06-22 George Koch Sons, Inc. Apparatus for advancing and forming a wire
US4514237A (en) * 1983-01-17 1985-04-30 Olaf Nigol Method of heat treating steel wire
US4612063A (en) * 1984-07-13 1986-09-16 Acme Fence And Iron Company, Inc. Method of making a fence stretcher bar
US4949567A (en) * 1988-11-04 1990-08-21 Corbin Edward W Apparatus and method for control of wire cast and helix
US20050016244A1 (en) * 2003-05-20 2005-01-27 Rainer Hergemoller Method for processing drawn material and drawn material production installation
US7073363B2 (en) * 2003-05-20 2006-07-11 Schumag Ag Method for processing drawn material and drawn material production installation
US20120111991A1 (en) * 2009-06-03 2012-05-10 Bridgestone Corporation Wire winding-off auxiliary device
US8931726B2 (en) * 2009-06-03 2015-01-13 Bridgestone Corporation Wire winding-off auxiliary device

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