Abstract: An embodiment of a method for profiling a tube of given length, whereby, after inserting the tube between at least one pair of rolls having respective coplanar, parallel axes of rotation crosswise to the tube, the rolls are moved onto the tube and pressed gradually against the tube, which, at the same time, is moved axially back and forth.
Abstract: A method for producing an ultrathin-wall seamless metal tube, which employs a cold pilger mill of mechatronics drive type including a mechanism to give a feed and a turn angle to a tube material, utilizes a roll having a tapered groove whose diameter gradually increases or gradually decreases from an engaging entry side to a finishing exit side of a pair of rolls, and a tapered mandrel whose diameter similarly gradually increases from the engaging entry side to the finishing exit side to elongate the tube material by reducing a wall thickness while expanding a mid-wall diameter of the tube material. By giving amounts of a turn angle and/or a feed equivalent or nearly equivalent to the forward stroke to the tube material immediately before the start of a backward stroke, it is possible to achieve a further increase in the reduction-rate of rolling, a further reduction of wall thickness, and improvement of dimensional accuracy of the product.
September 27, 2011
Date of Patent:
September 10, 2013
Nippon Steel & Sumitomo Metal Corporation
Abstract: An apparatus is disclosed having a plurality of cold rolling installations which each have a roll stand movable along a linear path and having at least one roll which is fixed rotatably to the roll stand, a drive connected to the roll stand and having an electric motor so adapted that the roll stand is drivable in an oscillating movement along the linear path, and a feed clamping saddle for feeding a blank. The apparatus has an electric control having at least two control outputs, wherein each control output is connected to the electric motor of the drive of a roll stand and wherein the control is so adapted that in operation of the apparatus it so controls the electric motors that they drive at least two of the roll stands with an adjustable phase displacement between the oscillating movements of the roll stands.
February 15, 2012
September 20, 2012
SANDVIK MATERIALS TECHNOLOGY DEUTSCHLAND GMBH
Abstract: The invention relates to a guide device in an installation for deforming a material (1), including adjustable, extending parallel to each other, edge guides (3a, 3b) arranged and positionable on both longitudinal sides (2a, 2b) of the material (1), wherein the edge guides (3a, 3b) are subjected to pressure applied by respective positioning devices (4), characterized in that the at least one positioning device (4) includes at least two pressure-applying devices (4a, 4b) switchable seriesly one after another.
Abstract: A horizontal strip accumulator for metal strip includes a looper car which is moveable along a travel path at at least one swivel gate which is moveable, when the looper car is moved, by the looper car between a starting position and an end position. For moving the swivel gate, the looper car acts on an actuating element which is connected with the swivel gate through a four-gear mechanism with two swivels. The swivel gate is rotatably arranged on one swivel and the actuating element is rotatably arranged on the other swivel. The actuating element has spoke-shaped projections and the looper car has counter projections which engage between the spoke-shaped projections.
Abstract: A cooling bed for rails (3) with an apparatus (12) which is intended for transferring the rails (3) onto the cooling bed (1) from an infeeding roller table (2) and is set up to bend the rails (3) counter to the bending which they undergo during cooling is constructed as follows:Said apparatus (12) has supports (25) which can be raised and lowered, can be displaced into the cooling bed (1) from the roller table (2) and are intended for the rails (3). In each case one abutment which is directed towards the underside of the rail foot and one abutment which is directed towards the top side of the rail foot are arranged on supports (25). The displacement paths of the supports (25) are controlled in accordance with the desired bending. The front abutment (37), as seen in the direction of displacement, can be let down into the support (25) by pivoting forwards and downwards.
Abstract: Assembly (12) to clamp a rolling ring (10) associated with a ring-bearing shaft (11) of a rolling mill stand, the clamping assembly (12) comprising a labyrinth ring (13), an alignment bush (18), a cap (15), a spacer (14), a closure flange (16) and a locking screw (17), means (30, 31) performing rotational clamping by frontal coupling being included between the cap (15) and the rolling ring (10), the spacer (14) having a frontal abutment (33) against the cap (15) and abutment means (40) against the rolling ring (10) and being associated axially with the cap (15) by means of key means (23), the key means (23) cooperating with seatings (25) provided in the spacer (14) in a longitudinally sliding manner, the spacer (14) defining a first gap (29a) of a required width between the opposed surfaces of the cap (15) and of the rolling ring (10) and a second gap (29b) between the means (30, 31) performing rotational clamping by frontal coupling.
Abstract: Disclosed is a process for producing a crimp-bonded fibrous cellulosic laminate. The process includes the steps of: 1) providing at least two superposed plies of a fibrous cellulosic material; 2) passing the superposed plies through a crimp roll arrangement including a rotating crimp element and a rotating anvil element; and 3) applying a pressure load against the rotating elements sufficient to crimp bond the fibrous cellulosic material plies into a laminate. The crimp element has protruding members configured in a discontinuous pattern aligned on an axis that is parallel to the cross-machine direction to provide a substantially continuous uniform area of localized surface contacts between the rotating crimp and anvil elements across the width of the plies. Also disclosed is an overall crimp-bonded fibrous cellulosic laminate and an apparatus for crimp-bonding multiple superposed plies of a fibrous cellulosic material.
May 23, 1995
Date of Patent:
April 22, 1997
Harry E. Clark, Cynthia W. Henderson, Robert C. Marcinek, Frances W. Mayfield, Thad W. Perkins, Jorg F. Voss
Abstract: An automatic stop apparatus for use in combination with a cold-pilger mill to reduce the amount of tube scrap generated during a cold-pilgering operation includes a first control scheme for stopping the advancement of the pilger mill feed carriage and the operation of the mill's upper and lower pilger dies when the feed carriage pushing a tube through the pilger dies is a predetermined distance from the axis extending between the centers of the pair of pilger dies. The predetermined distance is selected to provide that facing end portions of the pushed and pusher tubes are positioned between the pilger dies.
Abstract: Speed differential is detected between the entrance side and exit side of a looper, which is provided either on the feed side or on the delivery side of a central processing unit in continuous processing equipment and operates as a continuously supplying mechanism of steel plate, and positional relationship of movable rollers of the looper is detected, which virtually serves to diminish the speed differential, with reference to stationary rollers. By regulating the position of the movable rollers based upon the result of a calculation from the detected signals, the speed of the transported steel plate is controlled. First calculating apparatus calculates a relative speed differential based on the measurement of the looper entrance-side and exit-side speeds and the looper position and second calculating apparatus for calculating the optimum entrance-side speed based on the calculated result by the first calculating apparatus and the measured exit-side speed.
Abstract: A method and an apparatus for rolling metal strips by a tandem cold rolling mill. The strip is periodically swung in its width directions at a location upstream of the tandem rolling mill, to bring the strip into contact with rolls of the tandem cold rolling mill over areas of the rolls as widely as possible, thereby preventing irregular wears of the rolls to make it possible to produce defect-free metal strips.
Abstract: A method and apparatus for dressing coils of hot rolled strips, especially coilbox coils. A coil is placed in a coil support frame in such a way that it is rotatably supported about its axis. The coil frame is capable of taking up traction forces which act upon the hot strip. The traction mechanism of a traction device is secured to the end of the strip at the beginning of the coil. The strip is at least partially uncoiled from the coil via the traction mechanism. The thus uncoiled beginning of the strip is introduced into a roller truing machine until the strip is grasped by the truing rolls of the roller truing machine and is drawn into the latter.
Abstract: A first pair of generally cylindrical rollers are positioned on a run-out table. Each of the rollers has a first section including the first end of the rollers which is of a first diameter, a second section including the second end of the rollers of a second, larger diameter and a third section of changing diameter which forms a slope on the surface of the rollers joining the surfaces of the first and second sections. Each roller has its first and second ends mounted on opposite sides of the run-out table with respect to the other roller in the pair. A strip centered on the run-out table rests entirely on the smaller diameter section of the pair of rollers. The sloped sections of the rollers engage the sides of a strip as the strip veers away from the center line resisting lateral movement of the strip and cambering.
Abstract: Process and apparatus for preventing defects in the symmetry of rolled H-beams or I-beams, i.e., a faulty position of their webs (4) in relation to their flanges (5), by correcting such defects in situ. The differential between the torques applied to the upper and lower rolls (1,2) of the rolling stand is determined and compared to a predetermined threshhold value (.delta.). Any excess of the measured value over the threshhold value is eliminated by correction of the elevation of the inlet table of the rolling stand so as to reduce the measured value to below the threshhold value.
July 1, 1985
Date of Patent:
May 6, 1986
Institut de Recherches de la Siderurgie Francaise (IRSID)
Abstract: A spur gear assembly for axially mounting and supporting an end of a feed screw for each carriage and is driven from the main drive, since these feed screws of each carriage are arranged coaxially along a line parallel to a passline of the pilger mill. This spur gear allows relative rotation of the feed screws in this gear assembly mounting and a similar mounting is provided for the other screws of the pair of screws for each carriage. A first gear unit connected to the main drive causes a reciprocation of the stand along with the two feed carriages, and a second gear unit including a shaft clutch assembly is selectively brought into engagement and disengagement with the spur gear assemblies and the first gear unit to impart rotation to the screws to separately and independently advance and return the feed carriages to their starting position while one of the feed carriages continues to advance the shell through the mill.
Abstract: Device to separate without gaps the trailing end of a leading individual length of rolled stock and the leading end of a following length, which are parted from a rolled billet by cross-cutting shears, in the live-roller feed bed upstream of cooling beds, comprises a separate trough section disposed downstream of a switch in the form of a separating diverter subdivided into two parallel longitudinal sections, one with a fixed trough section and one vertically displaceable trough section which forms a depressed portion at a lower level.
Abstract: An apparatus for conveying tubular or bar-shaped rolled stock is provided having a collecting device which collects pieces of tube or bars from a cooling bed in closely spaced pockets, a transverse conveying device having the same pocket spacing as the collecting device which picks the collected pieces from the collecting device and transports them to and deposits them on a longitudinal conveyor, by means of which the pieces of rolled stock are fed to a cutting device which has a clamping device also provided with the same pocket spacing as the collecting device and which cuts the stock into portions of predetermined length.
Abstract: A method of hot rolling strip on a hot strip mill includes coiling on a coiler at least a portion of the transfer bar by initiating coiling at the tail end of the transfer bar after it exits the roughing train and, thereafter, decoiling or paying off the partially formed coil into the finishing stand. The coiler is movable between a first position adjacent the roughing train and a second position adjacent the finishing train. Coil payoff apparatus may be positioned adjacent to an upstream end of the finishing train for receiving the coil from the coiler and paying it off into the finishing train.
Abstract: A method of producing a continuous metallic tape from a metallic material wire by rolling. A wire having any desired cross-sectional shape is fed into the gap between a pair of rolls in a direction parallel to the axes of the rolls. The rolls are adapted to be reciprocatingly rotated or oscillated through a predetermined angular stroke. Guide members are provided at the material wire inlet side and the product tape outlet side for shifting the wire and the tape in a direction perpendicular to the direction of feed reciprocatingly and in synchronism with the rotation of the rolls. Pinch rolls are provided for intermittently feeding the wire when the latter is out of the area of rolling pressure.
Abstract: A method of producing a continuous metallic tape from a metallic material wire by rolling. A wire having any desired cross-sectional shape is fed into the gap between a pair of rolls in a direction parallel to the axes of the rolls. The rolls are adapted to be reciprocatingly rotated or oscillated through a predetermined angular stroke. Guides are provided at the material wire inlet side and the product tape outlet side for shifting the wire and the tape in a direction perpendicular to the direction of feed reciprocatingly and in synchronism with the rotation of the rolls. Pinch rolls are provided for intermittently feeding the wire, when the latter is out of the area of rolling pressure.
Abstract: The discharge roll table comprises a plurality of rollers for receiving extruded bar or tube. A top cover extending along the table above the rollers is of substantially inverted V-shape cross section and is divided along the top edge into two half covers pivotable to the left and right of the table respectively. Each half cover is divided into cover sections aligned end to end and is connected at an angle to lifting devices arranged between the rollers. Thus the extruded product may be lifted to the left or right of the table, which may be substantially the same length as the extruded product.
Abstract: A swaging machine for tight-swaging of end pieces (42) on a wire (44), cable, metal bar or metal filament having two with rolling grooves provided rolls (34,36) being freely rotatably mounted on two shaft journals secured to a base support. The machine is provided with a pulling device (54,56) that is securable by coupling means to the end piece when this end piece member is put in between the rolls and that can be controlled by an hydraulic driving unit (16) preferably for pulling the end piece between the rolls.
Abstract: Rolling mills for rolling seamless tubes from axially pierced blanks or billets using a restrained mandrel have suffered from a high dead time in the oprating cycle due to the necessity of returning a mandrel-restraining cross-piece or other member from its final position back to its initial position through the roll stands before beginning the positioning of the next billet to be rolled. This invention overcomes the above-mentioned problem by providing an elongate axially extending recess in the mandre-restraining crosspiece which allows the next billet to be positioned before the end of the preceding rolling operation. The mandrel-restraining crosspiece is ready to be connected up immediately to the next billet when the mandrel-restraining crosspiece has returned to its initial working position, by enabling the crosspiece to pass over the billet which goes through the recess.
Abstract: The invention relates to a taper rolling machine which is designed such that the stock may follow a constant pass line throughout the whole of the taper rolling operation.In particular the taper rolling apparatus comprises a pair of idler rolls (7 and 8) and a carriage (2) for gripping the stock (12) and drawing it through the rolls in a multiplicity of passes whilst the roll gap is controlled to impart the taper, this roll gap being adjusted by movement of only one (8) of the idler rolls. The invention is manifested by the carriage (2) being pivotally mounted at 6 and resiliently supported at its forward end by pneumatic, hydraulic or mechanical spring means--this enables the carriage to move in such a fashion as to maintain the stock at a level by which a constant pass line is secured.
Abstract: The feeder and the rolls are operated by separate cranks to avoid obstruction of the area in which the hollows are connected to the feeder. The two cranks are either separately driven or connected to a common drive; in either case, synchronism is maintained, and, preferably, an alternating retarding and advance component of movement is superimposed on one crank in relation to the other so that the feeder drive can take up some of the deforming work.
Abstract: In the process of rolling a tubular billet with a mandrel is displaced in the rolling direction as it is simultaneously rotated about its longitudinal axis. Then a portion of the billet is advanced between the working rolls and is drawn over the mandrel during backward movement of the billet together with the mandrel. During forward movement of the billet with the mandrel, the billet is displaced relative to the mandrel in the same direction for a distance equal to that covered by the billet portion fed into the gap between the working rolls. The backward movement of the billet with the mandrel is effected at a speed substantially close to the peripheral speed of the working rolls at the starting moment of the drafting operation. The pilger mill comprises a stationary stand with continuously rotating working rolls. The mill also incorporates a billet feeding and turning mechanism and a billet gripping jaw kinematically linked with each other.
June 8, 1978
Date of Patent:
January 22, 1980
Moskovsky Institut Stali i Splavov
Ivan N. Potapov, Petr I. Polukhin, Ivan P. Gremyakov, Mikhail A. Bitny, Anatoly G. Vinogradov, German D. Styrkin, Gennady V. Filimonov, Vladimir M. Kolesov, Igor M. Raushenbakh, Vasily P. Pedas, Alexandr V. Ukhov, Petr A. Rodionov
Abstract: The pilger rolls are driven through gear segments which are reciprocated by a crank and linkage which also reciprocates the feed mechanism; that mechanism includes a carriage and a mandrel holder in a feed slide on the carriage, the mandrel holder may also reciprocate on the carriage for purposes of compensation speed differentials. The upper roll is mounted to permit lifting for venting, but the gearing remains engaged so that subsequently a new adjustment is not needed.
Abstract: In the rolling of metallic material by using a rolling mill having a working roll for each surface of the workpiece reduced and having the shafts fixed with respect to movement in the direction of travel of the workpiece, the workpiece is rolled at such a high reduction rate in cross-sectional area that the contact angle .theta. between the working roll and the workpiece can have a value of .gtoreq. tan.sup.-1 .mu. (.mu. being the coefficient of friction between the working roll and the workpiece), and the rolling operation is carried out by pushing the workpiece between the working rolls, so that a neutral point of relative movements between the rods and the workpiece wire remain within the surface along which the working roll and the workpiece contact each other.
Abstract: A feeder is acted upon by opposing hydraulic drives and a spindle drive limits the advance. Hydraulic buffers are interposed either between the spindles and the feeder or between a carriage carrying the spindle drive and the machine bed. The buffer biasing force exceeds the force exerted by the feeder advance upon the feeder. The rate of buffer response is tracked separately.
April 20, 1977
Date of Patent:
July 18, 1978
Walter Vom Dorp, Hans Georg Ritter, Fritz Witteck
Abstract: A roll working apparatus for use in forming, pressing, punching, shearing, etc., comprising a pair of rolls on each surface of which a plurality of male or female impression portions having dissimilar form or configuration, a work-feeding means for selectively supplying a work to the working position of any one specific pair of the impression portions once per each rotation of the rolls, and a phase (or timing) adjusting means for the selective feeding of the work, in order to enjoy the merit of carrying out a desired process of production, without doing troublesome and time-consuming change of the rolls, only by adjusting the phase adjusting means and, if necessary, work-feeding means.
Abstract: An entry rollerway for a cooling bed for elongate rolled stock in which all parts necessary for guiding and laterally ejecting the rods are carried by lantern-shaped cast members which also constitute the bearings for the rollerway rollers, so that the long support structure or the frame-like understructure previously used in entry rollerways is avoided.
Abstract: The disclosure relates to a novel and improved arrangement of shell pusher for feeding tubular shells into a plug mill. The pusher comprises a ram carriage, which is movably positioned on an elongated carriage track on the upstream side of the plug mill. The ram stroke capacity of the carriage is designed to be relatively minimum, sufficient to advance a shell from a predetermined load position, directly in front of the mill, until the leading edge of the shell is drivingly engaged by the working rolls of the mill. Means in the form of a heavy, elongated rack and pinion arrangement are provided for pre-positioning the ram carriage in advance of each loading operation of a new shell and also in advance of the return of that shell from the downstream side to the upstream side of the mill after each pass.
Abstract: Apparatus is disclosed for forming foil leads by cross-rolling the round lead wire in successive passes through a roll press. In each pass, the lead wire is transported completely through the pinch area to form a foil having a lenticular cross section.
April 9, 1976
Date of Patent:
June 14, 1977
General Electric Company
George J. Calevich, John E. McMillan, Grant W. Ticknor
Abstract: A major deformation machine having two working roller systems with parallel axes, for example a planetary mill, is used for rolling ingots into metal strip. An ingot is forced into this major deformation machine by means of a conveyor mechanism. As the trailing end of the ingot nears the major deformation machine the conveyor mechanism is stopped and the spacing between the axes of the working roller systems is reduced by means of an adjusting mechanism, in order to roll the part of the work in the roller contact section of the machine until separation takes place. The so-separated rear end section of the ingot is then drawn back out of the machine. These operations can be controlled automatically by a control device including a detector operable by the end of the ingot approaching the major deformation machine.
Abstract: Manipulator for a rolling mill and particularly for a rolling mill for ingots or billets of steel. The manipulator comprises a pusher for pressing the ingot or billet through the roll-nip of the rolls at the beginning of rolling, and grab means for manipulating the ingot or billet during rolling when the pusher is raised up and the grab means can reach the ingot or billet.
Abstract: The feed mechanism for a pilger or Mannesmann rolling mill is driven by an electrical linear motor which is controlled on the basis of two pulse trains. One train is derived from the rolls, the other one from the reciprocating motor. The control is carried out to distinguish between a constant speed phase during a rolling pass, an acceleration phase for advancing the feed mechanism and a deceleration phase to obtain reversal ahead of re-engagement of the bloom by the rolls for the next rolling step.