Abstract: A steel pin is disclosed of a type to be forcibly driven into a steel substrate by using a powder-actuated tool. The steel pin has a substantially cylindrical shank and a substantially sharp point which extends from one end of the substantially cylindrical shank, which conforms substantially to a tangent or secant ogive except for a substantially spherical tip having a radius in a range of approximately 0.02 inch (approximately 5 millimeters) to approximately 0.03 inch (approximately 7.5 millimeters), which has substantially true concentricity, which has surface-texture irregularities with a roughness-height index value in a range from approximately 10 microinches (approximately 0.25 micrometers) to approximately 15 microinches (approximately 0.38 micrometers), and which appears to be substantially free of other surface imperfections when viewed under 60.times. magnification.

Abstract: A roll stand for a rolling mill has a housing with a through opening. The housing rotatably supports a pair of roll shafts, at least one of which is journalled for rotation in the eccentric bores of interconnected sleeves. The roll shafts carry work rolls positioned in the through opening to define a roll pass therebetween. An adjustment mechanism is axially engageable with one of the interconnected sleeves to rotate both sleeves and thereby adjust the parting between the work rolls. The adjustment mechanism is contained in a module which is separably connected to the housing.

Abstract: An optimizing method for improving the efficiency of production is provided for a steel rolling mill using a Steckel mill to roll steel slab to end-product thickness, and associated downstream equipment of limited capacity to generate strip and/or plate end-product. The optimizing method allows for continuous processing of steel slab of a mass within the capacity limits of the Steckel mill and equipment upstream of the Steckel mill, but in excess of the capacity of the associated downstream equipment, by first rolling the slab in the Steckel mill to intermediate coilable thickness, and then severing the intermediate steel product to produce two derivative segments, one of a target mass within the limit of capacity of the coiler furnaces and downstream equipment, and another, typically smaller, residual segment. The residual segment is disposed of, optionally first milled to end-product thickness in the Steckel mill, and transferred to conventional downstream equipment.

Abstract: The invention is directed to a hot-rolling process and a hot-rolling mill for metal strips (5) having one or more roll stands with work rolls (1, 2). In order to prevent surface defects on the work rolls (1, 2), a coolant liquid is sprayed on the entry side in a narrow region extending immediately in front of the roll gap exclusively by a series of flat jet nozzles in such a way that their core jets primarily strike the surface of the work rolls or are directed into the roll gap for direct cooling and in that the entering metal strip is acted upon at the same time by the same coolant liquid for protecting the surfaces of the rolls from the radiated heat of the metal strip. The spraying of the coolant liquid is regulated in such a way that the metal strip is cooled only in a very narrow outer zone. In so doing, the temperature at the surface of the work rolls (1, 2) is adjusted in such a way that it lies below the boiling point of the coolant liquid at least immediately in front of the roll gap.

Abstract: A work roll cross type rolling mill comprises a pair of work rolls and a pair of back-up rolls for backing up the work rolls. The back-up rolls are so arranged that their axes can be inclined within horizontal planes only to three or four specific angular positions. The work rolls are allowed to be inclined within horizontal planes with respect to the back-up rolls such that the axes of the work rolls cross the axes of the associated back-up rolls and cross each other. The nip between each the work roll and the associated back-up roll is lubricated so as to reduce axial thrust generated therebetween due to the crossing of the rolls. The cross angle between the work rolls is set and controlled during rolling operation only when the roll peripheral speed or the rolling speed is 50 m/min or higher.

Abstract: In a light section rolling mill, particularly wire rolling mill, for optimizing the product quality and/or output of the finishing train, at least one standard two-stand roughing block or group is arranged in front of and/or following the finishing train. Standard two-stand roughing blocks can be combined into roughing block units having four stands, six stands, eight stands or ten stands, and these units can be arranged in front of and/or following the finishing train.

Abstract: An apparatus for machining an end of a tube clamped within the apparatus and including a tool head rotatable about the axis of the tube, a plurality of tool holders including tools arranged about the tool head and radially moveable with respect to the axis, a plurality of push rods uniformly positioned about the tool head and axially parallel to the axis including oblique toothing positioned about one end thereof and a frame connected to the push rods and being displaceable along the axis to provide axial movement to the push rods. A transmission device including toothing for engaging the toothing on the push rods is positioned between the tool holders and push rods for imparting radial movement to the tool holders and tools connected thereto based upon axial movement of the push rods.

Abstract: A process for forming a screw thread on a corrugated bar used in concrete reinforcement joints such as anchor bolt joints. The ribs and flank fillets are removed from the end portion of the corrugated bar to be threaded. The end portion is then heated in a controlled manner such that the temperature of the end portion is highest at the end and falls smoothly toward the beginning of the ribless portion of the bar. The bar is immovably locked in place and the end portion is pressed by a movable cylindrical mold. Due to the temperature difference along the end portion, hot upsetting sets in at the end and advances toward the beginning of the ribless portion and the cross-sectional area of the end portion expands to become equal to an inner diameter of the mold. A screw thread is then formed on the end portion of the bar, the cross-sectional area of the screw thread being at least equal to the cross-sectional area of a remainder of the bar and the thread being longer than a diameter of the bar.

Abstract: Arrangement for fastening a roll unit carrier (2) firmly to roll stand. The roll stand comprises a fastening device (15) which is journalled eccentrically in a rotatable cylindrical member (14) and has one end (16) provided with a fastening surface (16a) which in the fastening mode of the arrangement coacts with a complementary surface on the carrier (2). The arrangement includes elements (17, 18) for rotating the cylindrical member between a fastening position in which the carrier is pressed against the roll stand at a predetermined force, and a release position in which the carrier can be moved towards or away from the roll stand without being impeded by the fastening device.

Abstract: A corrosion-resistant, headed fastener, such as a nail for exterior applications, is made from a carbon steel wire pre-coated with a protective, metallic layer having corrosion-resistant properties, the protective, metallic layer being discontinuous at a region on a leading end of the pre-coated wire. After at least part of a protective, metallic cap having corrosion-resistant properties is disposed near the leading end of the pre-coated wire, at least part of the protective, metallic cap is welded to the leading end of the pre-coated wire so as to cover the region where the protective, metallic layer is discontinuous, by impact welding, as a fastener is formed from the pre-coated wire in such manner that the fastener is formed with a shank and with a head, which is formed by deformation of the leading end.

Abstract: A multi-high rolling mill is disclosed which includes an upper work roll backed by an intermediate roll and a backup roll and a lower work roll backed up by a single backup roll. Control benders are provided on each of the intermediate roll and the upper and lower work rolls. In order to optimize the control of the rolling operation for skinpass rolling and the like, the control benders for the upper work roll and the intermediate backup roll are controlled so as to effect a control of the crown sheet over the entire width of the material being rolled, while the control bender for the lower work roll controls the sheet crown of the rolled material at the lateral side end portions, resulting in a composite control substantially improving the sheet quality and preventing edge wrinkles in the material being rolled. In the disclosed embodiments, the intermediate roll has a larger drum length than a predetermined maximum sheet width of rolled material to be rolled by the work roll.

Abstract: A machine for producing e.g. nails by providing oblong shanks (3) with an enlarged heads in one end (4) thereof comprising a rotatably tool ring (2) having a plurality, of holding tools for in one angle position during rotation of the tool ring receiving the shanks, and in another angle position securing the shanks so that they extend radially of the tool ring with each shank having its said end protruding inside the tool ring. Said machine also comprising a rotatably roll (1) mounted inside the tool ring at the securing position of this and adapted for deforming said protruding end of the shanks successively to provide enlarged heads thereon. Said machine further comprising a bending device (25) mounted between the receiving position and the rotatably roll for bending the protruding end of the shanks. Thus the machine according to the invention is able to provide on shanks enlarged heads having larger diameter in proportion to the diameter of the shank than known before.

Abstract: A roll-pair has synchronously driven shafts and a drive arrangement. The drive arrangement comprises an alternating current motor (12) and a planetary gear mechanism (13). The alternating current motor (12) and the planetary gear mechanism (13) are disposed in side-by-side relationship, the alternating current motor (12) having an output shaft and the planetary gear mechanism (13) having an input shaft. A transmission (14) connects the output shaft and the input shaft. The roll-pair and alternating current motor (12) and planetary gear mechanism (13) are all disposed on the same side of the transmission (14). The transmission (14) is a gear transmission. The input and output shafts are parallel to each other.

Abstract: A device for cutting threads into an unthreaded end of a shaft member has a cutting blade support member mountable on a first side of an elongate frame, an adjustably moveable shaft support mountable on a second end of the elongate frame in opposed relation to the cutting blade support member, and means for adjustably moving the shaft support member between a shaft clamping position and a shaft releasing position. The cutting blade support member has cutting blades in radially spaced apart relation depending therefrom, the radially spaced arrangement so as to engage the cutting blades tangentially with a shaft held between the cutting blades and the shaft supporting member when the shaft supporting member is in the shaft clamping position. The elongate frame rigidly supports the cutting blade support member and the shaft support member in opposed relation when the shaft is clamped therebetween.

Abstract: The invention provides a method for rolling hot mill band on a hot reversing mill so as to achieve acceptable finishing temperatures for such a light gauge product. The invention also minimizes the threading of a light gauge product through the mill and decreases the likelihood of cobbles along the runout table.

Abstract: In a previous process, the influence of roll eccentricities on the output thickness of the rolled material in a roll stand is suppressed by simulating the output signal of an oscillator and supplying this value to a position or thickness control for the roll stand, where the frequency of the output signal is set according to the roll rotation speed. In the process according to the invention, the amplitude and phase of the output signal are set so that the exit thickness of the rolled material is measured with a measuring delay in relation to the thickness reduction in the roll gap. A difference signal is generated from the delayed roll screw-down signal and a measured thickness signal multiplied by the sum of one and the quotient of the rigidity of the rolled material and the roll stand. The output signal of the oscillator is corrected according to the difference between the output signal and the difference signal. The output signal is phase shifted by the amount of measurement delay for a forward slip.

Abstract: A method and an arrangement for severing and controlled cooling of individual rods from a rolled section, particularly from a section of preferably high-grade steel which emerges hot from rolling at final speed from the rolling line of a finishing train, wherein the section is divided during its passage through parting shears into cut lengths and wherein a cut length each is conveyed after severing to an annealing strip or an annealing furnace. The rolled section is supplied to parting shears whose knives rotate on both sides of the section in a horizontal plane and which, when severing the section, displace the resulting section ends in the horizontal plane laterally relative to each other by a certain distance.

Abstract: A straightening machine for rolled beams, particularly hyper-beams, includes two straightening disks which are mounted on a straightening shaft and rest against the flanges of the beams from the inside, wherein at least one of the two straightening disks is axially displaceable. A support ring is arranged between the straightening disks. The support ring has distributed over the circumference thereof a plurality of hydraulic cylinders. The adjusting pistons of the hydraulic cylinders are connected to the axially displaceable straightening disk.

Abstract: A raft assembly in the roll forming art having a plurality of forming roll stands including a combined horizontal raft plate and first vertical stand formed together in an L-shaped single cast. The first vertical stand supports multiple station pairs of spindles at one end thereof and a plurality of second vertical stands each of which supports the opposite ends of a said pair of spindles on a single roll stand and bolts for attaching the second vertical stands to the raft plate oppositely positioned from said first vertical stand.

Abstract: A portable slitter for selectively roll slitting rib forming or perforating sheet metal workpieces and having a beam-type frame, a pair of spaced thin walled and light weight rotary torque tube roll shafts mounted in the frame and supporting the work rolls, and a plurality of pairs of opposed stabilizing support blocks disposed between the shafts and the associated frame beams and providing further strength to the shafts by functioning as intermediate span shaft journal supports carrying the roll work loads imposed on shafts directly into the frame beams. The bearing members can be readily removed and adjusted longitudinally of the shafts without taking the frame apart. The slitter can be readily manually transported to the work site because it has a high strength-to-weight ratio and is light in overall weight. The slitter has substantial operational strength and improved work roll registry and alignment under continuous and/or adverse on-site operating conditions.