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By a Account Reporter-Staff Account Editor at Life Science Weekly — From Alexandria, Virginia, NewsRx journalists abode that a apparent by the inventors Griggs, Francis W. (Indian Springs, AL); Brown, Jerry Thomas (Gardendale, AL); Morris, Brent Michael (McCalla, AL); Dollar, James R. (Orange Beach, AL), filed on December 23, 2014, was appear online on January 2, 2018 (see additionally Nucor Corporation).

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The patent’s abettor for apparent cardinal 9855594 is Nucor Corporation (Charlotte, NC).

News editors acquired the afterward adduce from the accomplishments advice supplied by the inventors: “Reinforcing metal confined (hereinafter ‘rebar’) are bars, generally fabricated of steel, accepting bulging ribs, which are about acclimated to reinforce accurate structures. The bulging ribs can booty a cardinal of shapes or geometries, including design shaped, X-shaped, V-shaped, etc. During the architecture of bridges, buildings, and agnate structures the rebar is generally placed in a accurate anatomy and accurate is caked about the rebar. The ribs in the rebar advice to ballast the rebar aural the concrete. The rebar adds backbone to the structures in which it is used.

“In archetypal rebar accomplishment acrimonious bar banal is fed through rolls to anatomy the annular shaped rebar and bulging ribs. In some applications the ribs on the rebar can be bogus to anatomy accoutrement that extend about the ambit of the amount of the rebar. In such threaded rebar, the alien accoutrement are able to accept a nut, collar, coupling, or added apparatus, which has centralized accoutrement that appoint the alien accoutrement on the threaded rebar. Threaded rebar can be acclimated to attach the ends of alternating rebar pieces calm application a coupling that mates with the accoutrement on the ends of alternating pieces of rebar and transfers endless aural casted accurate structures, caked accurate structural members, etc. Threaded rebar can additionally be acclimated to defended metal structures to accurate and rebar foundations (i.e., lampposts, bridges, etc.). Furthermore, threaded rebar can be acclimated as ts, for archetype in such applications as bedrock ts in mining operations.

“Standard rebar and threaded rebar can be bogus by algid rolling or hot rolling metal billets. In both processes a batten is fed amid two annular rolls that anatomy the batten into the rebar. The annular rolls accept grooves with notches (i.e. knurls) formed therein to accept a bar and anatomy the amount rebar appearance and bulging ribs as the bar passes through the rolls. In some rebar accomplishment processes collapsed dies can alter the annular rolls. The collapsed dies additionally accept grooves with notches formed therein, and are spaced afar to accept a bar that is rotated amid them in adjustment to actualize accoutrement or ribs forth the breadth of the rebar or a allocation thereof.

“When threaded rebar is bogus application algid rolling, the bar is anesthetized through the rolls beneath the recrystallization temperature of the metal, which increases the backbone of the metal, improves the apparent finish, and after-effects in tighter tolerances on the rebar amount and threaded ribs. However, algid rolling additionally causes assignment hardening of the metal, which after-effects in the metal acceptable brittle, and thus, added affected to arise at the abject of the formed threaded ribs. These problems are decidedly astute breadth threaded rebar is acclimated with a nut or a collar, and in these applications the algid formed threaded rebar is affected to abortive cilia failure.

“In a hot rolling action the bar is anesthetized through the rolls aloft the recrystallization temperature of the metal, which prevents assignment hardening that can advance to cilia failures. Threaded rebar fabricated from hot rolling after-effects in threaded rebar accepting compatible compactness backbone and addendum characteristics, as able-bodied as ribs that are beneath acceptable to able because they are an basic allotment of the bar and not assignment hardened. Furthermore, hot rolling allows for the use of steels with college compactness strength, and hot rolling processes do not crave added bar case or swaging of the threaded rebar. The problems with threaded rebar bogus through hot rolling accommodate the accumulation of ribs that are base and clumsy to be acclimated in applications acute bound cilia tolerances.

“Threaded rebar can additionally be bogus by basic accepted rebar (utilizing either algid rolling or hot rolling), and thereafter, machining a allocation of the rebar to add the adapted threads. Machined accoutrement aftereffect in bound tolerances; however, machined accoutrement are weaker than algid formed threads. Moreover, accomplishment threaded rebar by machining the accoutrement decidedly increases the accomplishment costs associated with the threaded rebar, as it requires assorted processing steps, as able-bodied as time arresting and big-ticket handling.

“There are a cardinal of problems associated with accomplishment threaded rebar application annular rolls in a hot rolling process. Annular rolls are acclimated to anatomy square, cylindrical, or added shaped confined into annular rebar with axle accoutrement formed into adverse abandon of the annular rebar. The axle accoutrement formed are alternate and in some cases not accumbent if the annular rolls are not appropriately synchronized. Moreover, in these processes, two longitudinal ribs are formed forth the breadth of the threaded rebar, which is a aftereffect of the balance metal from inconsistencies in the appearance of the bar as able-bodied as the gap amid the annular rolls acclimated to anatomy the threaded rebar. The gap amid the rolls is all-important so that the rolls do not rub adjoin anniversary added during the rolling process, back such abrading may aftereffect in frictional calefaction that could accident the rolling system. The longitudinal ribs that aftereffect from processing anticipate the threaded rebar from actuality advisedly rotatable aural a nut or added alliance internally threaded coupling. In adjustment to accomplish threaded rebar after longitudinal ribs, added accomplish are all-important that accoutrement or microburst off the longitudinal ribs. In some processes alone the longitudinal ribs are machined off, however, in added processes the absolute face of the bar with the longitudinal rib is machined into a collapsed surface. In still added processes the longitudinal ribs are sheared off application saw-tooth rotary dies, which are spaced afar to microburst off sections of the longitudinal ribs amid amid the axle ribs on the threaded rebar. In added processes the longitudinal ribs are arena off application a bland canal rotary die that grinds bottomward the longitudinal ribs. All of these methods present cogent drawbacks, including added processing steps, added processing time, and added processing equipment, all of which access the amount of accomplishment the threaded rebar.

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“Continuous threaded rebar is added adorable than alternate threaded rebar back it increases the compactness backbone of the rebar due to the added apparent breadth acquaintance with the alliance nut, threaded bore hole, etc. In some embodiments of the invention, a connected or decidedly connected axle rib can be produced through hot or algid rolling processes. However, in adjustment to aftermath a connected or decidedly connected circling axle rib added than two opposing dies are acclimated (i.e. three or four opposing dies that anatomy the threaded rebar at the aforementioned time), admitting in accepted rebar accomplishment alone two dies are used. The charge for added than two dies after-effects in added accessories costs and added die accoutrement costs back alteration the applique amid accepted rebar accomplishment accessories and connected or decidedly connected threaded rebar accomplishment equipment. A connected axle rib can additionally be produced on bar banal application processes added than rolling, but these processes are additionally added time arresting and cher because of the added accessories costs and applique accoutrement times.

“Therefore, there is a charge to advance methods and systems that can be acclimated to aftermath threaded rebar at bargain costs and in beneath accomplishment times.”

As a supplement to the accomplishments advice on this patent, NewsRx correspondents additionally acquired the inventors’ arbitrary advice for this patent: “Embodiments of the present accoutrement abode the aloft needs and/or accomplish added advantages by accouterment systems and methods that are acclimated to actualize threaded rebar with essentially connected accoutrement application a rolling process, wherein a majority of the ambit of the threaded rebar is covered by the alternate threads; and wherein no added accomplish are appropriate to aish longitudinal ribs in the threaded rebar.

“Embodiments of the accoutrement comprise basic a batten from aqueous animate and hot rolling the batten to abate the cross-sectional breadth of the billet. Thereafter, the batten is hot formed into a advance canyon bar accepting a cross-sectional breadth absolute a bargain amplitude ambit amid adjoining to the centermost longitudinal arbor of the bar. In one apotheosis of the invention, the batten can be formed into a bar accepting a cross-sectional breadth in the appearance of an alarm or peanut (i.e., the alarm advance canyon bar) by agriculture the batten through a aboriginal set of rolls (i.e., advance canyon cycle set). After the alarm advance canyon bar is formed, it is anesthetized through a added set of rolls (i.e., threaded canyon cycle set) in adjustment to anatomy the essentially connected threaded rebar after longitudinal ribs. As explained in added detail beneath the cross-sectional breadth of the advance canyon bar helps to aftermath a essentially connected threaded rebar artefact after longitudinal ribs application accepted rebar accomplishment applique and equipment.

“Embodiments of the accoutrement comprise methods of accomplishment threaded rebar and articles fabricated from the methods of accomplishment threaded rebar. One apotheosis of the accoutrement is a adjustment of accomplishment threaded rebar absolute accouterment a advance canyon bar absolute a anatomy extending forth a longitudinal axis, wherein at atomic one allocation of the anatomy has a array defining a even that intersects the longitudinal axis, wherein a aboriginal allotment of the even has a aboriginal amplitude and a added allotment of the even has a added amplitude and wherein the aboriginal amplitude is not according to the added width; and basic a threaded rebar from the advance canyon bar.

“In added accordance with addition apotheosis of the invention, the even has a acme ambit essentially centered forth the longitudinal axis, wherein the aboriginal allotment of the even is amid angular adjoining to the longitudinal arbor and the aboriginal amplitude is abate than the added amplitude of the added allotment of the even amid angular distal from the longitudinal axis.

“In addition apotheosis of the invention, the aboriginal allotment of the even is angular adjoining to the longitudinal arbor and the aboriginal amplitude is abate than the added amplitude of the added allotment of the even and a third amplitude of a third allotment of the plane, wherein the added allotment of the even and third allotment of the even are amid angular distal from the longitudinal axis.

“In yet addition apotheosis of the invention, the aboriginal allotment of the even is ellipsoidal in appearance and the added allotment of the even and third allotment of the even are at atomic about circular, wherein the added allotment of the even is amid angular aloft the aboriginal allotment of the even and the third allotment of the even is amid angular beneath the aboriginal allotment of the plane.

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“In still addition apotheosis of the invention, the even is peanut shaped or the even is alarm shaped.

“In added accordance with addition apotheosis of the invention, the aboriginal amplitude of the aboriginal allotment of the even is beneath than or according to ninety percent of the added amplitude of the added allotment of the plane.

“In addition apotheosis of the invention, accouterment the advance canyon bar comprises basic the advance canyon bar from a billet. In yet addition apotheosis of the invention, the advance canyon bar is formed by rolling the batten admitting a advance canyon cycle set accepting against advance canyon grooves that actualize the array defining the even that intersects the longitudinal arbor absolute the aboriginal allotment of the even accepting the aboriginal amplitude and the added allotment of the even accepting the added width.

“In still addition apotheosis of the invention, the against advance canyon grooves accept a abyss in the ambit of 0.178 and 0.2705 inches, a ambit of curvature in the ambit of 0.1470 and 0.7442 inches, and a bend ambit of curvature in the ambit of 0.3378 and 0.757 inches, all inclusive.

“In added accordance with an apotheosis of the invention, the advance canyon cycle set has a aboriginal advance canyon cycle spaced afar from a added advance canyon cycle to actualize a gap amid the aboriginal advance canyon cycle and the added advance canyon cycle in a ambit of 0.005 and 0.250 inches inclusive.

“In addition apotheosis of the invention, the advance canyon bar is formed through hot rolling at a temperature in the ambit of 1650 degrees to 2250 degrees Fahrenheit inclusive. In yet addition apotheosis of the invention, the advance canyon bar is formed through rolling at a amount in the ambit of 300 to 2600 anxiety per minute inclusive.

“In still addition apotheosis of the invention, basic the threaded rebar comprises rolling the advance canyon bar admitting a threaded canyon cycle set accepting against threaded canyon grooves with against threaded canyon knurls in the against threaded canyon grooves.

“In added accordance with an apotheosis of the invention, the against threaded canyon grooves accept a abyss in the ambit of 0.2015 and 0.386 inches, a canal ambit of curvature in the ambit of 0.2358 and 0.4270 inches, and a bend ambit of curvature in the ambit of 0.0355 and 0.0447 inches, all inclusive. In addition apotheosis of the invention, the against threaded canyon knurls accept a abyss in the ambit of 0.040 and 0.0727 inches, and a bulge ambit of curvature in the ambit of 0.2989 and 0.5002 inches, all inclusive.

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“In yet addition apotheosis of the invention, the threaded canyon cycle set has a aboriginal threaded canyon cycle spaced afar from a added threaded canyon cycle to actualize a gap amid the aboriginal advance canyon cycle an the added advance canyon cycle in a ambit of 0.005 and 0.250 inches inclusive.

“In still addition apotheosis of the invention, the threaded rebar is formed through hot rolling at a temperature in the ambit of 1650 degrees to 2250 degrees Fahrenheit inclusive. In added accordance with an apotheosis of the invention, the threaded rebar is formed through rolling at a amount in the ambit of 300 to 2600 anxiety per minute inclusive.

“In addition apotheosis of the invention, basic the batten comprises melting atom animate into aqueous metal in an electric arc furnace; appointment the aqueous metal from the electric arc boiler to a bail for refining; appointment the aqueous metal from the bail to a tundish; depositing the aqueous metal from the tundish into a baptize cooled cast to anatomy a fiber of steel; casual the fiber of animate through rollers and baptize sprayers to coalesce the fiber of animate into the billet; acid the batten into the adapted lengths; heating the batten in a reheating boiler for rolling; and casual the batten through one or added rolling comminute stands to abate the cross-sectional breadth of the billet.

“In yet addition apotheosis of the invention, the advance canyon bar comprises the acme ambit in the ambit of 0.8210 to 1.378 inches, a aboriginal allotment amplitude ambit in the ambit of 0.4080 and 0.6490 inches, and a added allotment amplitude ambit in the ambit of 0.3110 and 0.579 inches, all inclusive.

“In still addition apotheosis of the invention, the adjustment added comprises acid grooves into a advance canyon cycle set for basic the advance canyon bar. In added accordance with an apotheosis of the invention, the adjustment added comprises installing a advance canyon cycle set. In addition apotheosis of the invention, the adjustment added comprises acid against threaded canyon grooves into a threaded canyon cycle set for basic the threaded rebar, and acid a advantage of against threaded canyon knurls into the against threaded canyon grooves of the threaded canyon cycle set for basic the accoutrement of the threaded rebar.

“In yet addition apotheosis of the invention, the adjustment added comprises installing a threaded canyon cycle set for basic the threaded rebar. In still addition apotheosis of the invention, the adjustment added comprises synchronizing a aboriginal threaded canyon cycle and a added threaded canyon cycle in a threaded canyon cycle set in adjustment to essentially adjust top accoutrement and basal accoutrement on the threaded rebar.

“In added accordance with an apotheosis of the invention, basic the threaded rebar comprises basic the threaded rebar with essentially connected threads. In addition apotheosis of the invention, a distinct cilia of the essentially connected accoutrement covers ninety percent or added of the ambit of the threaded rebar.

“Another apotheosis of the accoutrement comprises an accoutrement for accomplishment threaded rebar. The accoutrement comprises a advance canyon cycle set absolute a aboriginal advance canyon cycle and a added advance canyon roll, wherein the aboriginal advance canyon cycle and the added advance canyon cycle accept against advance canyon grooves that anatomy a advance canyon bar accepting a anatomy extending forth a longitudinal axis, wherein at atomic one allocation of the anatomy has a array defining a even that intersects the longitudinal axis, wherein a aboriginal allotment of the even has a aboriginal amplitude and a added allotment of the even has a added amplitude and wherein the aboriginal amplitude is not according to the added width.

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“In added accordance with an apotheosis of the invention, the even has a acme ambit essentially centered forth the longitudinal axis, wherein the aboriginal allotment of the even is amid angular adjoining to the longitudinal arbor and the aboriginal amplitude is abate than the added amplitude of the added allotment of the even amid angular distal from the longitudinal axis.

“In addition apotheosis of the invention, the aboriginal allotment of the even is angular adjoining to the longitudinal arbor and the aboriginal amplitude is abate than the added amplitude of the added allotment of the even and a third amplitude of a third allotment of the plane, wherein the added allotment of the even and third allotment of the even are amid angular distal from the longitudinal axis.

“In yet addition apotheosis of the invention, the aboriginal allotment of the even is ellipsoidal in appearance and the added allotment of the even and third allotment of the even are at atomic about circular, wherein the added allotment of the even is amid angular aloft the aboriginal allotment of the even and the third allotment of the even is amid angular beneath the aboriginal allotment of the plane.

“In still addition apotheosis of the invention, the even is peanut shaped or the even is alarm shaped. In added accordance with an apotheosis of the invention, the aboriginal amplitude of the aboriginal allotment of the even is beneath than or according to ninety percent of the added amplitude of the added allotment of the plane.

“In addition apotheosis of the invention, the accoutrement added comprises one or added comminute stands, wherein the one or added comminute stands accept a batten with a cross-sectional breadth and abate the cross-sectional breadth of the billet, and wherein the advance canyon cycle set uses the batten to anatomy the advance canyon bar.

“In yet addition apotheosis of the invention, the accoutrement added comprises a threaded canyon cycle set, wherein the threaded canyon cycle set forms a threaded rebar from the advance canyon bar.

“In still addition apotheosis of the invention, the against advance canyon grooves accept a abyss in the ambit of 0.178 and 0.2705 inches, a ambit of curvature in the ambit of 0.1470 and 0.7442 inches, and a bend ambit of curvature in the ambit of 0.3378 and 0.757 inches, all inclusive.

“In added accordance with an apotheosis of the invention, the aboriginal advance canyon cycle is spaced afar from the added advance canyon cycle to actualize a gap amid the aboriginal advance canyon cycle and the added advance canyon cycle in a ambit of 0.005 to 0.250 inches inclusive.

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“In addition apotheosis of the invention, the threaded canyon cycle set comprises a aboriginal threaded canyon cycle and a added threaded canyon roll, wherein the aboriginal threaded canyon cycle and the added threaded canyon cycle accept against threaded canyon grooves with against threaded canyon knurls in the against threaded canyon grooves.

“In yet addition apotheosis of the invention, the against threaded canyon grooves accept a abyss in the ambit of 0.2015 and 0.386 inches, a canal ambit of curvature in the ambit of 0.2358 and 0.4270 inches, and a bend ambit of curvature in the ambit of 0.0355 and 0.0447 inches, all inclusive.

“In still addition apotheosis of the invention, the against threaded canyon knurls accept a abyss in the ambit of 0.040 and 0.0727 inches, and a bulge ambit of curvature in the ambit of 0.2989 and 0.5002 inches, all inclusive.

“In added accordance with an apotheosis of the invention, the aboriginal threaded canyon cycle is spaced afar from the added threaded canyon cycle to actualize a gap amid the aboriginal threaded canyon cycle and the added threaded canyon cycle in a ambit of 0.005 to 0.250 inches inclusive.

“In addition apotheosis of the invention, the accoutrement added comprises an electric arc furnace, wherein the electric arc boiler melts atom animate into aqueous metal; a ladle, wherein the bail is acclimated for adorning the aqueous metal; a tundish, wherein the tundish holds the aqueous metal; a baptize cooled mold, wherein the baptize cooled cast forms a fiber of animate from the aqueous metal accustomed from the tundish; rollers and baptize sprayers, wherein the rollers and baptize sprayers coalesce the fiber of animate into a billet; a cutter, wherein the cutter cuts the batten into the adapted lengths; and a reheating furnace, wherein the reheating boiler heats the batten for rolling.

“In yet addition apotheosis of the invention, the accoutrement added comprises a coupling box, wherein the coupling box synchronizes the aboriginal threaded canyon cycle and the added threaded canyon cycle in adjustment to essentially adjust against threaded canyon knurls for basic essentially accumbent top accoutrement and basal accoutrement on the threaded rebar.

“The features, functions, and advantages that accept been discussed may be accomplished apart in assorted embodiments of the present accoutrement or may be accumulated in yet added embodiments, added capacity of which can be apparent with advertence to the afterward description and drawings.”

For added advice on this patent, see: Griggs, Francis W.; Brown, Jerry Thomas; Morris, Brent Michael; Dollar, James R.. Threaded Rebar Accomplishment Action and System. U.S. Apparent Cardinal 9855594, filed December 23, 2014, and appear online on January 2, 2018. Apparent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=/netahtml/PTO/srchnum.htm&r=1&f=G&l=50&s1=9855594.PN.&OS=PN/9855594RS=PN/9855594

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Keywords for this account commodity include: Business, Nucor Corporation.

Our letters bear fact-based account of analysis and discoveries from about the world. Copyright 2018, NewsRx LLC

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