Abstract: A roll forming machine is provided having a series of mill stands, each having an upper roller and a lower roller that performs a roll forming step. The upper roller rotates on a central axis that is parallel to the lower roller. Each roller has a driven feature that connects to a driving feature. The driving feature for the upper roller can rotate independently from the driving feature of the lower roller. A control system is capable of monitoring, controlling, and displaying the individual torque and speed of separate motors that rotate the individual driving features.

Abstract: A method for straightening a tube by using an asymmetric roll, which has different diameters D1 (exit side), D2 (entry side) at relative maximum diameter portions, left and right roll shoulder portions, as a straightening roll of a straightener, wherein the roll shoulder having a smaller diameter is disposed to be located on the tube entry side. The straightening roll used therefor comprises roll shoulders 3a and 3b and a roll barrel portion 4, in which D1>D2 and 0.004?(D1?D2)/d?0.2 (d: outer diameter of tube to be straightened) are satisfied. Further, an aspect of the invention may define radii of curvatures of entry-side and exit-side shoulder potions in a section of the roll cut along a plane including the roll central axis, or a curve representing an outer surface of the roll barrel portion.

Abstract: A method for straightening a tube by using an asymmetric roll, which has different diameters D1 (exit side), D2 (entry side) at relative maximum diameter portions, left and right roll shoulder portions, as a straightening roll of a straightener, wherein the roll shoulder having a smaller diameter is disposed to be located on the tube entry side. The straightening roll used therefor comprises roll shoulders 3a and 3b and a roll barrel portion 4, in which D1>D2 and 0.004?(D1?D2)/d?0.2 (d: outer diameter of tube to be straightened) are satisfied. Further, an aspect of the invention may define radii of curvatures of entry-side and exit-side shoulder potions in a section of the roll cut along a plane including the roll central axis, or a curve representing an outer surface of the roll barrel portion.

Abstract: In straightening a duplex stainless steel pipe on a multi-roll pipe straightener, the value of A defined by the formula (1) is set to not more than 2.0% when it is not necessary to improve the mechanical strength of the pipe, and the value of A is set to more than 2.0% but not more than 3% when it is necessary to improve the mechanical strength of the pipe. Thereby, the mechanical strength of the duplex stainless steel pipe is regulated, A=(Di?Hi)/Di??(1) where each of the symbols in the formula (1) indicates the following: Di: the outer diameter (mm) of the pipe at an entry side of an i-th stand in the straightener, and Hi: the gap (mm) between groove bottom portions of the rolls at an i-th stand in the straightener.

Abstract: In straightening a tube using a roll straightening machine provided with drum type straightening roll pairs vertically opposingly disposed, at least an outer layer portion of a roll main body is made of elastic material having spring type hardness Hs (JIS K 6301 A type) of 50 to 100 in at least three pairs of straightening rolls on an outlet side of the roll straightening machine, and an offset amount is imparted to a tube engaged in the three pairs, at least, of straightening opposing rolls such that ? defined by an equation (1) ranges from 1.0×10?3 to 1.5×10?3. The offset amount is set at three positions along a tube axis where the upper and lower rolls of each pair horizontally cross. Therefore, an S/N ratio can be enhanced in an eddy current test from inside of the tube to improve inspection efficiency, and excellent quality accuracy can be ensured in a heat transfer tube used in a steam generator and the like.

Abstract: A cross-roll straightener for blank and black stock, especially rounds, in which the upper roll is mounted on a roll bed guided on columns of the machine frame via adjusting devices. Two diagonally opposite devices have hydraulically-controlled wedges and a threaded spindle controlling the vertical movement of the roll bed is also provided with a hydraulic arrangement for blocking spindle mobility.

Abstract: A cross-roll straightener for blank and black stock, especially rounds, in which the upper roll is mounted on a roll bed guided on columns of the machine frame via adjusting devices. Two diagonally opposite devices have hydraulically-controlled wedges and a threaded spindle controlling the vertical movement of the roll bed is also provided with a hydraulic arrangement for blocking spindle mobility.

Abstract: A system and method for detecting the exact position of the contoured, cross rolls in a multiple roll rotary straightener including provision of selected transverse and axial surfaces on the roll frames themselves and means for detecting the exact position of these surfaces whereby the rotary straightener can be returned to a preselected operating condition.

Abstract: A cross-roll straightener adapted to straighten round metal stock, wire, rods, bars and tubes by rotatingly advancing the stock through a central curved pass such that it is flexed beyond the yield point in a substantially uniform and gradual manner. A three pair roll arrangement provides uniform guidance and flexure while avoiding marking or collapsing of the stock. Also provided is a method for maintaining the stock in the pass line of a cross-roll straightener having a female roll and a male roll of unequal diameters. In addition, positive guidance and considerably more capacity to straighten smaller stock sizes is obtained by providing adjustable outboard roll supports at each end of the basic six-roll straightener, thereby also reducing whipping of the stock.

Abstract: A cross-roll straightener adapted to straighten round metal stock, wire, rods, bars and tubes by rotatingly advancing the stock through a central curved pass such that it is flexed beyond the yield point in a substantially uniform and gradual manner. A three pair roll arrangement provides uniform guidance and flexure while avoiding marking or collapsing of the stock. Also provided is a method for maintaining the stock in the pass line of a cross-roll straightener having a female roll of larger diameter than the male roll.

Abstract: A roll configuration for use in a roll type straightener including a concave surface of revolution formed on a roll for line contact of the roll with a cylindrical workpiece wherein the throat of the surface of revolution is offset longitudinally from the axial midpoint of the surface of revolution whereby a pair of such rolls may be employed in mutually-aligned or non-offset relationship with respect to the cylindrical workpiece axis to provide lateral restraint of such a workpiece being subjected to a bending moment.

Abstract: An apparatus for straightening pipe, round bars or similar elements, wherein the pipe moves between rolls which subjects the pipe to tensile and compressive stresses and forces as it rotates in the straightener apparatus, with the movement of the pipe being effected by rotation of the rolls. Certain of the rolls are vertically adjustable with respect to the pipe and others are horizontally adjustable with respect to the pipe and to each other while certain other rolls are adjustable both vertically and horizontally with respect to the pipe and to each other while the pipe is moving through the apparatus and the straightening operation is in progress, whereby the forces being applied to the pipe may be readily changed in accordance with the bends or other deformity in the pipe to assure that the required forces are applied to the proper pipe areas to accomplish effective straightening of the pipe.

Abstract: The invention concerns a tube release roll mill with four or more driven rolls, which in pairs form a pass opening. The diagonally positioned identically constructed rolls have an enlarged working surface width. A certain roll pair spacing is also provided, as well as an enlarged angle of attack of the rolls, which together result in the wall thickness of the tube bloom being more uniform, the development of fewer surface defects, and a quieter operation of the roll mill.

Abstract: A cross-roll straightener adapted to straighten round metal stock, wire, rods, bars and tubes by rotatingly advancing the stock through a central curved pass such that it is flexed beyond the yield point in a substantially uniform and gradual manner. A three pair roll arrangement provides uniform guidance and flexure while avoiding marking or collapsing of the stock.

Abstract: The invention relates to a method and an apparatus for the straightening of drawn round stock. In conventional straightening methods, the round stock to be straightened is transported through the straightener with the entrance and exit in alignment, being thus straightened. With this procedure, large pieces at the beginning and end of the round stock to be straightened are straightened in an unsatisfactory manner and must therefore often be cut off before further fabrication of the round stock. To remedy this disadvantage it is proposed that for instance the deviation from the straight entry line forcibly obtained in the straightener arc by deflection, is maintained as the exit direction from the arc. To this end each round stock receiving device is oriented or can be oriented behind an exit die at least by its receiving elements in such a way that the round stock leaving the exit die enters such receiving elements or the next die series without appreciable changes of direction.

Abstract: Angular orientation of a straightener machine roll relative to the vertical axis thereof is achieved through the use of a pair of single acting hydraulic actuators imposing force against a roll support member on laterally opposite sides of a vertical plane through the roll axis, and vertical orientation is achieved through the use of a double acting hydraulic piston and cylinder unit to which the roll support member is attached. Corresponding servo valve mechanisms control fluid flow to the two single acting actuators and to the double acting piston and cylinder units, and both angular orientation and vertical orientation are selectively position or force controlled.

Abstract: An apparatus for straightening the bend in steel pipes, round bars and the like (hereinafter simply referred to as steel pipes). The apparatus includes a first straightener comprising a combination of concave rolls and a second straightener comprising a combination of a concave roll and a convex roll and arranged at least at the entry side or the exit side of the first straightener and the top rolls or the bottom rolls of the first and second straighteners are adapted to be moved vertically, whereby when one or the other of the first and second straighteners presses a steel pipe, the pressure application of the other straightener is released so that the bend extending practically over the entire length of the steel pipe is straightened and the bend in the end portions of the steel pipe is straightened by the second straightener, thus straightening the steel pipe in a short period of time with a high degree of accuracy.

Abstract: Straightening apparatus includes opposed straightening rollers through which generally cylindrical elongated workpieces pass generally longitudinally. Opposite flat guide members extend between the rollers and have opposed front guide edges between which a workpiece is guided as it travels through the rollers. The side edges of the guide members extending generally perpendicular to the direction of workpiece travel are individually releasably clamped by clamping devices for providing adjustment of the guide members toward and away from a workpiece to facilitate initial adjustment and to renew the front guide edges as they become worn. Each individual clamping device is also independently adjustable in a direction generally perpendicular to the first adjustment direction for imparting curvature to the guide members extending between curved straightening rollers.

Abstract: Method for straightening elongated drawn round stock, which includes simultaneously advancing the stock in the longitudinal direction, rotating the stock about the longitudinal axis thereof and deflecting the stock from a straight line exceeding the yield point thereof in a straightening arc, and subjecting the surface of the stock to friction forces acting in the longitudinal direction during the deflection.

Abstract: A bar straightening machine comprises a pair of rolls between which there is defined a path including two bends along which bar to be straightened is passed. The rolls are preferably of identical form, each comprising a first end portion of hyperbolic form, a second end portion also of hyperbolic form and an intermediate portion which merges smoothly with the end portions. The hyperbola from which one end portion is generated differs from the hyperbola from which the other end portion is generated, one end portion having a diameter somewhat greater than the corresponding diameter of the other end portion. The rolls are arranged with identical end portions remote from each other.

Abstract: A mobile pipe straightening machine is of relatively light-weight construction for increased transportability and finds particular application for straightening drill pipe in the field. For minimizing the overall weight of the machine, a bed frame is provided in an elongate, trough-shaped, construction having first and second upstanding sides and a bottom member to define a bed space. At least one drive roll is swivelly supported within the bed space, and first and second idler rolls are movably coupled to the bed frame in spaced relationship with the one drive roll. Each idler roll is supported within a housing which in turn is supported within a dome-shaped support structure. A bushing having a key slot and a key for the key slot is disposed between the dome-shaped support structure and the housing.

Abstract: A feed channel for elongated workpieces including a plurality of adjustable workpiece receiving openings. Each opening is formed by a plurality of profiled segments including a fixed segment and at least one movable segment. The movable segments are movable to expose the openings for lateral introduction thereinto of an elongated workpiece. The movable segments are then moved to reduce the size of the openings and engage the workpiece for at least partially straightening same. The movable segments are then moved to increase the size of the openings for providing longitudinal and rotational movement of the workpiece relative to the openings. Workpieces are smoothly carried into the feed channel instead of being rolled or dropped thereinto. The fixed segments are positioned and profiled for locating the longitudinal axes of various diameter workpieces in the same plane.

Abstract: The invention relates to rolls of a skewed-roll machine. The rolls include a back-up roll and a pressure roll, having their axes extending at an angle to each other and at an angle to the trueing axis. The back-up roll has a biconcave profile, the portions of this roll, adjoining its ends, having the same hyperboloidal concavity with the degree of curvature providing for the engagement of the roll with the narrow central portion of the article being trued. The central portion of the back-up roll has hyperboloidal concavity with a degree of curvature to perform the trueing by bending the thickened end portion of the article being trued. The other roll, i.e.

Abstract: An apparatus for straightening rod or bar-shaped material has a pair of end straightening devices spaced in the direction of the length of the material to be straightened and each having a pair of side-by-side rolls thereon, one having a convex roll profile and the other having a concave roll profile, and the axes of the rolls being oppositely inclined to the horizontal, and driving motors connected to the respective rolls for driving the rolls in the same rotational direction. At least three intermediate straightening devices are provided between the pair of end straightening devices and each having a guide horizontally slidably mounted for movement perpendicular to the direction between the end straightening devices, a supporter on the end of the guide which is adjacent the path of the material through the apparatus, and a straightening tube freely rotatably mounted with the supporter.

Abstract: A method of straightening elongated workpieces of circular or other cross section comprises subjecting a portion of the workpiece during its movement in longitudinal direction thereof to rotary bending forces so that successive curvatures of the workpiece in a zone trailing said portion in said direction gradually increase to thereby surpass the yield point of the material of the workpiece and in a zone leading said portion in said direction gradually decrease in such a manner that the decrease of the curvatures and the corresponding decrease of the plasticity of the workpiece occurs slower than the increase thereof, and an apparatus for carrying out the method.

Abstract: A method and an apparatus for carrying out the method for straightening sections of elongated workpieces such as bars and tubes in a bending, forging and/or straightening machine having at least one straightening roll which can be moved radially relative to the workpiece and at least a second roll for determining the straightening gap end face. During the initial and end phase of the straightening process the head and tail sections of the workpiece, respectively, are affected by a roll which moves in accordance with a preselected mathematical function or sequence.