Abstract: An apparatus for straightening wire stock includes a support member defining a generally elongated opening adapted for advancement of the wire stock therethrough, at least a first pair of engaging members associated with the support member and extending from a first direction sufficiently to engage the wire stock during advancement through the opening, at least a second pair of engaging members associated with the support member and extending from a second direction sufficiently to engage the wire stock during advancement through the opening, a mechanism for rotating the first and second pairs of the engaging members about an axis in general alignment with a longitudinal axis defined by the support member and a mechanism for selectively adjusting the positions of at least one of the first and second pairs of the engaging members relative to the longitudinal axis.

Abstract: Method and device (10) to obtain in the hot state single finished round bars (12a-112a) from hot single multiple elements (11), wherein the device (10) cooperates with at least a penultimate finishing stand (25) and cooperates directly with rolls (26) of that finishing stand (25) and with generating profiles included in that stand (25) and comprises means to displace vertically and reciprocally the plane of positioning of each single bar (12a) forming the central part of the multiple element, and also comprises means to displace sideways on the plane of positioning at least the single outermost lateral bars (112a) of the multiple element (11) , and further comprises upstream guiding system means (20) and mating wheel means (21-121) which define separation passes (13) and contain at least one lateral edge with a lateral wedge-shaped bevel (15).

Abstract: A lubricant is supplied from headers of lubricant supply units onto surfaces of back-up rolls at locations spaced from contact positions between a pair of work rolls and a pair of back-up rolls. The headers each include a lubricant spray nozzle for spraying the lubricant under a pressure not lower than 3 kg/cm.sup.2, a header cover for confining the lubricant sprayed from the lubricant spray nozzle, an oil return line for returning the surplus lubricant, and seal members made of flexible material such as rubber. The work rolls are provided with water wiping plates, and the back-up rolls are also provided with water wiping plates. In a work rolls crossing type mill thus arranged, water films of cooling water deposited on the roll surfaces are removed to prevent the cooling water from mixing into the lubricant. Even if the water films are not totally removed, it is possible to surely plate out the lubricant for reliably lubricating between the work rolls and the back-up rolls.

Abstract: The invention focuses on improvements to cantilevered roughing, intermediate and finishing rolling mill stands, primarily for long products. A basic improvement to 2-high and cluster mill stands includes mounting of the rolling bearings upon a stationary cantilevered arbor directly under the roll ring, eliminating heavily-loaded main reaction bearings within the stand housing in limited radial space. Individual drive motor assemblies for each shaft, rigidly coupled and directly supported by the drive shafts, are also advocated, in preference to floor-mounted drives via pinion stands to spindles and couplings. This eliminates drive reaction forces acting against the stand assembly, allowing direct measurement and control of interstand tension/compression, for which appropriate hardware is outlined. A cluster mill assembly features work roll cartridge assemblies adapted for off-line set-up and ultra-fast roll and guide changes, which is particularly adapted to intermediate and finishing pass applications.

Abstract: An apparatus and method is provided for controlling the temperature of dies and workpiece throughout a deformation process. Dies are capable of receiving external current to resistively heat the workpiece and dies during the deformation operation, the external current being modulated by feedback temperature readings taken from the workpiece. External current may be provided from a homopolar generator capable of producing pulsed dc current at controllable intervals and magnitudes simultaneously through the dies and workpiece.

Abstract: A method of forming a threading tool for producing a thread of varying pitch in a work piece by relative rotary and axial movement between the tool and work piece. The tool is constructed to have a series of threading projections including a first series of pre-forming projections for initially producing a partial thread and groove in the work piece, and one or two final projections for reshaping the partial thread to have the varying pitch.

Abstract: A mandrel mill for rolling seamless steel tubes includes a plurality of roll stands each having a pair of rolls defining a roll groove therebetween, an axis of the rolls of each roll stand being orthogonal to the axis of the rolls of the adjacent roll stands. The mandrel mill further includes a mandrel bar disposed in the roll grooves configured by the roll stands. The ratio between the radius of curvature of a groove bottom of the groove and a distance between the groove bottom of the roll groove of the first stand ranges from 0.46 to 0.54, and that of the second stand ranges from 0.48 to 0.52.

Abstract: A rolled strip extending out of a rolling stand is pushed by a push roll to apply a tension to the strip. The flatness measuring surface of a flatness bar is moved above the pass line to measure flatness values at a plurality of points in the widthwise direction of the rolled strip, based on the applied tension.

Abstract: Immediately behind a tap of an automatic threading machine to which nuts or like pieces are fed in succession, is a straight portion of a cast-off sheet coaxial with the tap and which is followed by an inclined portion including an obtuse angle with the straight portion. Another straight portion parallel to the first includes an obtuse angle with the inclined portion and guide passages are formed around the inclined portion and the final parallel portion in a head which is rotated to drive the tap. The nuts thus pass over the tap and the cast-off shaft and axial play of the cast-off shaft is minimized.

Abstract: The invention relates to control in the manufacture of hot strip by means of a multi-stand hot-strip rolling mill, especially a wide-strip rolling mill, which has a higher-order process control system with a sampling plan with the initial and final dimensions, with material data, rolling temperatures, etc., and a guidance system for setpoint control of lower-order decoupled individual regulators for the variable functional parameters of the individual roll stands, e.g. roll adjustment, rotational speed, torque, etc., with the setpoints of the individual regulators being determined by means of a computation process using model equations with convergent parameter adjustment to the actual parameters, in such fashion that a working point control that can be determined in advance is provided and section control and regulation are accomplished by changing the load distribution on the individual stands in such fashion that the working points lie in the previously determined tolerance range of a shape control line.

Abstract: In a method of elongating a metal tube by means of a mandrel mill, a tapered mandrel bar is inserted into a hollow piece and the feeding speed of the mandrel bar is controlled so as to change the length by which the mandrel bar projects beyond the delivery end of the final stand of the mandrel mill at the point of time when the leading end of the hollow shell is gripped by the rolls in the final stand. As a result, the wall thickness of the hollow shell is altered to permit the rolling of hollow shells of many sizes with different wall thicknesses using a single mandrel bar.

Abstract: The present invention relates to a method of controlling the productivity of a rolling plant having at least first and second rolling stands by processing a single slab of metal having a thickness, into metal strips having different thicknesses less than the thickness of the slab in accordance with strip output requirements of the rolling plant. The output requirements for strips having at least first and second different thicknesses to be produced by the rolling plant is determined. The slab is then rolled in a first rolling stand to reduce the slab thickness to produce a transfer bar. The transfer bar is sheared into first and second transfer bar portions such that the first and second transfer bar portions are sized to correspond to the output requirements for the first and second strips, respectively. The first transfer bar portion is then rolled in one of the first and second rolling stands to reduce the first transfer bar portion to produce a first strip having a first thickness.

Abstract: Dual-purpose universal rolling stand, which is suitable to be equipped as a two-high rolling stand (113) and a universal rolling stand (213) and which cooperates with a standardized base plate (29) and comprises four housings (28) with outer support projections (41) and inner arms (47) including lateral position surfaces (48) and specific means to anchor main screwing-down screws (34) and also comprises standardized one-type bearing blocks (36) for the two purposes of the stand, the bearing blocks (36) cooperating with the housings (28) and the main screws (34) to form respectively two first housings/bearing blocks assemblies (30) and two second assemblies (24) of housings/bearing blocks/vertical rolling rings in which the third vertical rolling ring assemblies (25) are included, the first assemblies (30) or the second assemblies (24) being installed facing each other and reciprocally positioned by equipment holder bars (33) and (133) repectively.

Abstract: In descaling and cold rolling of metal strip, there are performed the steps of joining strips longitudinally together, passing the joined strip continuously through a descaler, subdividing the descaled strip into long strip lengths and coiling the long strip lengths into large coils at a first coiling station having a plurality of coiling drums, feeding the large coils from said coiling station to a cold rolling mill and rolling each of them in the mill. The cold rolling mill is a reversing multi-pass cold rolling mill in which the strip is rolled in a plurality of passes with reversal. To achieve efficient use of the capacity of the reversing mill while reducing the size of the descaler, coiling and uncoiling of two said large coils respectively take place simultaneously at the first coiling station, and each long strip length is coiled a first time on one of the coiling drums at the coiling station on exit from said descaler and at least a second time on the same coiling drum during its rolling in the mill.

Abstract: A system for controlling a thickness of a strip being rolled by a rolling mill having more than two rolling stands, in tandem configuration. A subcontrol unit controls a rolling speed and a rolling load of a final rolling stand according to a predetermined control schedule. A plurality of tension gauge units installed between adjacent rolling stands detect a tension of the strip. A plurality of thickness gauge units including at least first thickness gauge unit installed on the output side of a first rolling stand, second thickness gauge unit installed on the output side of a penultimate rolling stand, and final thickness gauge unit installed on the output side of the final rolling stand, detect a deviation in the thickness of the strip from a predetermined value.

Abstract: The sheet profile of a strip on the outlet side of a final stand coincides with a desired value without deforming the shape of the strip, by using a hot strip finish rolling mill having a number of rolling stands disposed sequentially. The rolling mill employs feedback control of upstream stands to reduce the error between a sheet profile measured by a sheet profile meter disposed at the outlet side of a selected stand and a desired sheet profile. The selected stand is the stand where the sheet thickness of the strip is at the percentage sheet crown critical sheet thickness. The sheet profile measured by the sheet profile meter is used to control the downstream stands using feed-forward control to make the sheet profile on the outlet side of the final stand coincide with the desired sheet profile.

Abstract: A stabilizer bar or a similar metallic tube product for vehicles, has a central portion and at least two bent portions forming legs. The bar includes a thick-walled metallic tube having in the central portion a wall thickness and outside diameter in a ratio amounting to at least 1/10. This tube has an outside wall portion bent with a restricted thinning, ranging from about 5 to 15%. The bent portions are bent with an average bending radius of curvature in the range from about 1.4 to 2.1 times the outside diameter of the tube. Apparatus and methods can manufacture stabilizer bars or similar tubular metallic products of the foregoing type. For example, a method includes the steps of fitting to a bending arm one end of the thick-walled metallic tube. An inside wall portion of the tube has a radial spacing from a bending center of curvature, no greater than the length of the bending arm. The tube and the heating zone move relatively, with the heating zone advancing along the tube.

Abstract: A terminal crimping apparatus for performing a crimping operation to crimp a wire barrel end of an electrical terminal on a stripped bare wire end of an electrical conductor, includes a reciprocal ram having a crimping tool cooperable with a crimping anvil and movable between a die open or ready position and a crimping position. The crimping apparatus also includes a device for monitoring the crimped height of the terminal on the conductor during each crimping operation. The monitoring device can be adjusted to accommodate different terminal and conductor configurations. Once calibrated, the monitoring device can be operated in an automatic mode and can be set to automatically stop the terminal crimping apparatus in the event that the crimped height of a terminal and conductor is greater than a selectable and setable high limit or is less than a selectable and setable low limit. The monitoring device operates on the principle that there is a relationship between crimping pressure and desired crimped height.

Abstract: A method and apparatus are provided for refining the domain wall spacing of a grain-oriented silicon steel sheet by mechanical scribing using a segmented anvil roller and a scribing roll. The segments of the anvil roll are arranged side by side along an arbor. The arbor carries inflatable bladder ribs along the length of the arbor to provide uniform contact pressure to the strip during scribing at the opposite side of the strip by the scribing roll.

Abstract: Roll apparatus in which the rotation under the tangential force exerted when the apparatus is in use of the rolling rings relative to the arbor is suppressed by the restoring force of the arbor that is elongated and held in the elongated condition exerting an axial pressure on the rolling ring assembly. The arbor is elongated by expansion of a chamber to which the arbor is connected through a thrust ring which forms a boundary of the chamber. In addition to the thrust ring, the boundaries of the chamber are a flanged ring mounted on the arbor, which is fixed, and the arbor. An adjustable spacing collar is connected to the arbor. After the arbor is elongated, the collar is adjusted to engage the flanged ring, thus locking the arbor against contraction.