Abstract: To substantially increase the periods of time between the changing of rolling segments and to reduce the amount of work connected therewith in a roll stand for a planetary rolling mill, chocks in which stationary support bodies having rolling segments are mounted are provided with a square or octagonal disk shape, and each support body, instead of having one rolling segment as known heretofore, is provided with four or eight rolling segments distributed uniformly on its periphery. A turnable rolling ring is, further, provided at each end of each support body.

Abstract: A method of and a device for controlling a counter of a rolled material on a multi-high rolling mill with which method and device very accurate shape control can be attained with certainty and in high responsibility. A strip shape of a rolled material in its widthwise direction on the outgoing side of the rolling mill is detected by a strip shape meter, and the detected shape and a strip thickness are synthetically evaluated using a total performance index. Operation amounts for a strip shape controlling actuator and a strip thickness controlling actuator which make the value of the total performance index minimum are always found out, and the actuators are controlled simultaneously in accordance with the operation amounts to control the strip shape of the rolled material. The apparatus comprises a saddle receiver the vertical position of which is controlled by a roll gap controlling device in accordance with an estimated value to change the gap between upper and lower work rolls of the rolling mill.

Abstract: Taper rolling apparatus including a pair of rolls (10,12) the spacing of which can be varied according to the linear movement of a workpiece clamped in a carriage assembly (26). So that the roll gap can remain at a constant mean height throughout the rolling operation, mechanism including a horizontally disposed wedge member (56) is provided, the wedge member being constrained to move along a horizontal path and effecting the adjustment of pairs of roll chocks (44,44 and 46,46) bearing against the opposite sides of said wedge member.

Abstract: This invention provides a continuous hot rolling process for making thin strip in which it is possible to roll strips at high rolling speeds required to keep a finisher delivery temperature equal to or higher than an Ar.sub.3 transformation temperature. The gist of the present invention resides in a continuous hot rolling process in which the rolling speed of a final finishing mill is kept constant or slightly increased until the leading end of rolled strip travels from the final finishing mill to a down coiler which process comprises: rolling a predetermined length of the leading end portion of a stock being rolled in accordance with a strip thickness greater than a finished thickness; then reducing the strip thickness to the finished thickness by gauge alteration in rolling; and subsequently rolling the following portion.

Abstract: A method and apparatus for rolling a taper in or out of a strip during reduction by a rolling mill, rolling a first portion of the strip by employment of a gaugemeter roll gap control system using a first value for the mill stretch above the natural mill stretch value for the mill and which value during the rolling of the first portion will be a fixed value, thereafter rolling a second portion of the strip in the same rolling operation by using a value for the mill stretch in the gaugemeter roll gap control system which will vary to effect a change in the roll gap and hence a change in reduction of the strip in which the second value may be a linear function.

Abstract: Method of controlling a strip crown in a planetary mill line, comprising the steps of rolling a slab by using a shaped feeding roll or rolls before passing between planetary rolls to shape a slab profile in the direction of the width of the slab having a flat or curved central portion, opposite side end thicker than the central portion and side portions thinner than the central portion between the central portion and the opposite side ends and subsequently rolling the slab having such a shaped slab providing a planetary rolled strip having a substantially flat strip crown having a uniform thickness over the width of the strip.

Abstract: A method for hot rolling a continuously cast thin slab to form strip comprising the steps of: (a) subjecting a segment of predetermined length of the slab to a reduction pass in a first direction between a pair of work rolls; (b) retracting the segment in a direction opposite the first direction to the entrance side of the work rolls while accommodating the additional length of the segment produced by the reduction operation; (c) repeating steps (a) and (b) in sequence as necessary to finish the segment; and (d) consecutively subjecting the next contiguous portion of the slab to steps (a), (b) and (c) until the slab is finished along its entire length. Apparatus for practicing the method also is disclosed.

Abstract: A rolling mill has a pair of cooperating work rolls with first and second chock pairs associated with each work roll. At least one work roll is rocked in a direction generally perpendicular to the longitudinal axis of the work roll during operation of the rolling mill to enhance shear rolling and create regions of irregular thickness in the workpiece. This reduces friction between the work rolls and the workpiece in subsequent rolling thereby permitting greater lateral spread of the workpiece. The rocking may be effected in a generally vertical direction by a pair of cylinders secured to a pair of chocks or may be effected in a generally horizontal direction which may be that of the path of flow of the workpiece through the rolling mill by pairs of cylinders associated with each work roll or may involve rocking in both directions.

Abstract: An edger mill comprising a pair of oppositely mounted vertical rolls adapted for relative movement whereby the gap between them can be adjusted. Each roll is provided with a drive including a drive shaft comprising two drive sections extending generally parallel to the direction of roll gap adjustment. The first drive section has a splined portion coupled to a drive pinion for accommodating large adjustments effected in the roll gap when the mill is not under load. The second drive section is connected to the first drive section by a splined coupling which accommodates small roll gap adjustments effected when the mill is under load.

Abstract: A roller mill, in which the milling rollers are pressed together with high pressures, has a fluidic device for imparting the respective pressure. This fluidic device comprises piston-cylinder units and a pressure line for the fluid. In order to obtain a skewing of at least one roller in dependency upon the pressure exerted by the fluidic device, pressure sensitive means are interposed between the pressure line and a displacing device for the skewing angle. In this way, a pressure signal may be transferred to a converter for converting the pressure into a corresponding displacement stroke. Preferably, at least one roller has a basic camber or crown which corresponds to a pressure within a lower range of the occurring pressures.

Abstract: A method of and an apparatus for controlling the load distribution ratio among a plurality of stands in a continuous rolling mill preferentially performs load distribution ratio control between or among a group of downstream side ones of the stands including the last stand to appropriately correct the load distribution ratio between or among the downstream side stands.Subsequently, correction of the load distribution ratio is performed for a group of the downstream side stands and an upstream stand, and this will be repeated in order for the upstream side stands to effect correction of the load distribution ratio for the entire stands.

Abstract: A method of and apparatus for correcting the rolling load distribution ratio between given stands in a continuous rolling mill involves comparison of rolling load amounts at a pair of adjacent stands with a load distribution ratio set value. When coincidence is not found, the plate thickness on the exit side of an upstream side one of the pair of stands is changed, and at a time when a plate thickness changing point reaches the downstream side stand, the rolling reduction position at the downstream side stand is corrected so as not to change the plate thickness on the exit side of the downstream side stand.

Abstract: A method of operating a rolling mill in a manner that avoids the occurrence of alligatoring in a slab of metal as it is reduced in thickness in the mill. The slab is subject to a schedule of repeated passes through the mill to effect a predetermined amount of reduction in thickness of the slab in each pass. The method comprises the steps of analyzing the pass schedule of such a slab, and noting any pass in the schedule that has a combination of entry gauge and reduction draft that may subject the slab to alligatoring. An untapered nose of the slab is next presented to the bite of the mill, and if the combination of entry gauge and reduction draft is one that is not subject to alligatoring, the slab is passed through the mill to reduce its thickness as scheduled.

Abstract: A method of reducing the thickness of a slab of metal under conditions that tend to produce alligator defects in the ends of the slab, the method comprising the steps of tapering at least one end of the slab and directing the same into a rolling mill. The tapered end of the slab is reduced in thickness in the mill, the amount of reduction increasing as the tapered end passes through the mill. The slab continues through the mill to reduce the thickness of the same. The end of the slab is again tapered and directed again through a rolling mill, with each of said tapers providing combinations of entry thickness to thickness reduction such that the reduction taken in the area of each taper is in an entry thickness to thickness reduction zone that does not produce alligatoring in the ends of the slab. The remaining untapered portion of the slab is reduced in thickness in the mill in an entry thickness to thickness reduction zone in which alligator formation tends to occur.

Abstract: The apparatus and method make possible the semicontinuous rolling of an extensive range of product widths from no more than three widths of slabs. The leading end of a slab is forged or upset laterally between dies tapered to reduce its width at said end gradually to a value less than the desired width at the end of the pass. The slab is then passed through grooved vertical edging rolls to reduce its width and into the rolls of a roughing stand. The edge rolling tends to move the overfilled metal into the void created by the dies. As the trailing end of the slab approaches the roughing stand the edging rolls are backed off, allowing that end of the slab to fan out laterally. As the slab leaves the roughing stand it is rolled between grooved vertical edging rolls to reduce spread and bring the fanned-out trailing end to size. That operation causes the trailing end to bulge rearwardly at its center, so compensating for fishtailing.

Abstract: A process of rolling steel in a reversing mill by passing the steel back and forth through the mill for a selected number of passes to achieve the desired thickness and on at least two early passes, each in a different direction, tapering the ends of the steel during taper passes by adjusting the roll gap, the roll gap adjustment (.DELTA.H) being a function (F(.DELTA.F.sub.m)) of the change in roll force (.DELTA.F.sub.m) above a lock-on force (F.sub.1) which lock-on force is established on the instant taper pass.

Abstract: A roll mill stand comprising a main roll mounted in bearings encompassed by pads, and an auxiliary roll with a strip passed between the rolls. The pads and the auxiliary roll are movable on guides provided on the housing. The stand further includes a mechanism to control the profile and shape of the strip. The mechanism comprises a drive, a crosspiece with a groove, which is movable on the guides of the housing, a wedge received in the groove of the crosspiece and connected to the drive, and two cams installed in channels provided in the walls of the groove of the crosspiece. The wedge is conjugated with a collet which is mechanically coupled to the crosspiece, encompasses the auxiliary roll and has two grooves, and with two inserts, each received in a respective groove of the collet and conjugated with a respective cam.

Abstract: The invention provides a method for controlling a continuous rolling mill having at least ith and (i+1)th stands and a control apparatus therefor, wherein an exit strip thickness reference value of an automatic gauge control is changed in accordance with a predetermined strip length during size changing and roll gap is corrected so as to change a strip thickness at an exit side of the ith stand, when a size (e.g.

Abstract: The apparatus and method make possible the semi-continuous rolling of an extensive range of product widths from no more than three widths of slabs. The leading end of a slab is forged or upset laterally between dies tapered to reduce its width at said end gradually to a value less than the desired width at the end of the pass. The slab is then passed through grooved vertical edging rolls to reduce its width and into the rolls of a roughing stand. The edge rolling tends to move the overfilled metal into the void created by the dies. As the trailing end of the slab approaches the roughing stand the edging rolls are backed off, allowing that end of the slab to fan out laterally. As the slab leaves the roughing stand it is rolled between grooved vertical edging rolls to reduce spread and bring the fanned-out trailing end to size. That operation causes the trailing end to bulge rearwardly at its center, so compensating for fishtailing.

Abstract: An apparatus, for controlling the re-distribution of a load in a longitudinal direction of a single strip (which is called hereinafter within the plate) on a multistage continuous rolling mill, stores a standard expression of the distribution of the load for maintaining a product's shape constant within the plate. A screw-down correction computer system calculates deviations from this reference equation and controls a rolling force on each of the rolling mills. It thereby maintains the standard expression of the distribution of the load by iteratively correcting a roll opening on each of the rolling mills within the plate. The control of the load distribution among the roll stands is effected after the roll material has entered all of the roll stands.

Abstract: When two strand workpieces pass through a roll opening between two grooved working rolls on a roll stand so as to be rolled, the trailing end of one of them may leave the rolls and cause change in the roll separation. At that time mating bilateral screw-down devices are remotely controlled to adjust the roll opening at least at the position of the remaining workpiece. Alternatively in a multi-strand tandem rolling mill, the rolling speeds on roll stands upstream of a roll stand which one of the strand workpieces has left are changed by a speed ratio of (1-b.sub.2)/(1-b.sub.1) where b.sub.1 and b.sub.2 respectively designate rates of backward slip when two strand workpieces are being rolled and in the absence of one of the strand workpieces from the last-mentioned roll stand. Alternatively the roll speeds on roll stands downstream of the roll stand which one of the strand workpieces has left may be changed by a speed ratio of (1+f.sub.2)/(1+f.sub.1) where f.sub.1 and f.sub.

Abstract: In a rolling mill wherein hot rolled rod is directed along a downwardly curved path into a vertical laying head which forms the rod into a series of rings, a method of and apparatus for propelling the rod through the laying head. The rod is passed between a pair of adjustable driven pinch rolls located in advance of the downwardly curved path. An initial closing force is exerted on the pinch rolls to establish an initial parting prior to entry of a rod front end therebetween. The initial parting is sized to produce at least some rod deformation while providing a driving relationship between the pinch rolls and the rod. The initial closing force is greater than the momentary surge in separating force accompanying impact of a rod front end with the pinch rolls. The initial parting is maintained until the rod front end has negotiated the downwardly curved path and has passed through the laying head, at which time the initial closing force is released.

Abstract: An edge roller assembly has a fixed guide member on which a support block is displaceable in a predetermined adjustment direction so as to move an edge roller rotatable on the block about an axis transverse to this direction. A threaded pin spindle extends generally parallel to the direction and bears on the block and is threaded into a nut in an adjustment member. A pair of links each have an inner end pivoted on the guide member and an outer end pivoted by means of a respective eccentric pin on the adjustment member. Thus rotation of these pins can relatively displace the adjustment and guide members, so as to move the rollers carried by the support blocks toward one another even while engaging a workpiece.

Abstract: An approximately shaped or formed gear is fabricated in any desired way and is then corrected by means of substantially ring-shaped rolls or rolling tools performing striking or hammering operations in the tooth gaps of such gear. The rolls rotate in a planetary fashion in revolving rolling or roller heads. Such rolling heads are advanced to a maximum radial penetration depth of the rolls which is governed by a stop and are then retracted, if necessary. The advance or feed is preferably performed by a hydraulic drive, the pressure of which is regulated electro-hydraulically by means of a template or the like. The hydraulic drive acts against the action of a spring. The approximately formed teeth, which are thus rolled in an overlapping manner, are produced by the addition of material per tooth flank. Preferably, such material addition amounts to at least twice or three-fold the summation pitch error according to DIN 3960 to 3962 (German Industrial Standard 3960 to 3962).

Abstract: Method for manufacturing long bars, round, square or flat, employing multi-tandem type roller dies mechanism in which each roller gap is controlled by the roller gap adjusting mechanism, and apparatus preferably applicable that method. The apparatus is provided with a plurality sets of roller dies, controllers for outputting a respective target roller gap for each roller dies, roller adjusting mechanisms capable of shifting, in accordance with the commanding signals from servo devices based on the output target roller gap, each roller of each set of roller dies symmetrically about the axial line of the die hole formed by the roller dies, roller position sensors for measuring the respective roller gap in order to feed back the measured results to the servo devices, and a propelling mechanism for imparting a deformable blank propelling force.

Abstract: In a tandem rolling mill a control computer integrates the entry speed of a work strip having a gauge transition to determine the arrival of the transition at a first roll stand. At that time a screw-down on that stand is updated through a scheduling computer while roll speeds on all the stands remain unchanged. When the gauge transition arrives at each of the succeeding stands as determined by the control computer integrating a roll speed on the preceding stand, the scheduling computer updates a screw-down on the arrival stand and changes roll speeds so as to minimize the sum of the squares of changes in roll speed with the constant mass flow relationship fulfilled.

Abstract: A paper web treatment device is disclosed, which includes a nip forming roll pair. One of the rolls of the pair comprises a mantle portion rotatable on a central shaft portion. This roll is arranged to be moved in a radial direction for disengagement from the other roll. There are means for producing a mechanically guided rotary motion at both ends of the shaft portion simultaneously with the radial motion of the roll. The shaft portion is used as a rigid member mechanically interconnecting the rotary motions at both ends of the roll, thereby synchronizing the radial motions of both ends for obtaining exact parallel disengagement of the movable roll from the other roll.

Abstract: The mill stand comprises forming rolls, which have congruent forming elements, mounted on a stand frame member in such a way that one of the forming rolls is adapted for a vertical reverse motion. This forming roll is connected with a hydraulic cylinder provided with control means, interacting with a master device operatively connected with one of the forming rolls.

Abstract: A device for narrowing the breadth of a sheet spring material in an apparatus for manufacturing a taper leaf spring by which the sheet spring is previously subjected to breadth narrowing operation with edge rollers before taper rolling.A shape for narrowing the breadth of a sheet spring material is calculated so that a product after rolling may be within the tolerance. Then, a shape of template thus obtained is detected by a pair of detecting rollers to regulate the interval between the work rollers automatically before taper rolling.

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: In an apparatus for manufacturing a taper leaf spring, by which after performing rolling on the edges of a sheet spring material in the direction of its breadth, rolling for tapering the sheet in the direction of its thickness is carried out, an edge roll assembly is employed for the sake of rolling in the breadth direction. In the edge roll assembly, constraining flanges for regulating the sheet thickness are provided on both ends of the main body of the edge roll so that expansion of both sides of a sheet spring material in the sheet thickness direction due to the effect of rolling in the sheet breadth direction is suppressed by the flanges and the thickness of a sheet spring material is kept uniform as a whole prior to performing rolling in the sheet thickness direction.

Abstract: Method for manufacturing long bars, round, square or flat, employing multi-tandem type roller dies mechanism in which each roller gap is controlled by the roller gap adjusting mechanism, and apparatus preferably applicable that method. The apparatus is provided with a plurality sets of roller dies, controllers for outputting a respective target roller gap for each roller dies, roller adjusting mechanisms capable of shifting, in accordance with the commanding signals from servo devices based on the output target roller gap, each roller of each set of roller dies symmetrically about the axial line of the die hole formed by the roller dies, roller position sensors for measuring the respective roller gap in order to feed back the measured results to the servo devices, and a propelling mechanism for imparting a deformable blank propelling force.

Abstract: A taper-rolling machine comprises a four-high rolling mill having driven work rolls and means for adjusting one work roll and its back-up roll relative to the other work roll; a drawbar reciprocable relative to the rolling mill for drawing a blank through the mill; a mechanism for adjusting the adjustable work roll and back-up roll according to the position of the drawbar to effect taper rolling; and edger rolls acting on the blank to control the widthwise spread of the blank during rolling by the rolling mill.

Abstract: A taper spring is manufactured by rolling which is achieved by a single-spindle planetary rolling mill having a shiftable upper roll and a planetary roll constructed by a main roll and a plurality of satellite rolls while applying predetermined longitudinal tension to a material by a drawing chuck located at the outlet side of the rolling mill and a pair of relatively movably feed rolls located at the inlet side of the rolling mill.

Abstract: A method of producing a plate material having a uniform width and a lengthwise thickness variation by imparting plastic deformations to a work by means of widthwise rolling rolls and thicknesswise rolling rolls. The method has the steps of measuring the travelling amounts of the work at the outlet sides of the widthwise rolling rolls and the thicknesswise rolling rolls, continuously changing the roll gap of the widthwise rolling rolls in accordance with the measured travelling amount and a predetermined condition so as to reduce the width of the work at portions of the latter where the width is expected to be increased as a result of the subsequent thicknesswise rolling so that the work after the thicknesswise rolling may have a uniform width, and changing the thickness of the work by continuously changing the roll gap in the thicknesswise rolling rolls in accordance with the measured travelling amount and a predetermined condition. Also, disclosed is an apparatus for carrying out this method.

Abstract: A method of forming a taper leaf for use in a laminated spring wherein pre-tapering work is first performed by which a terminal portion of a sheet of spring material is transformed in its lateral direction so as to become thinner toward the tip while maintaining the vertical thickness of the sheet or section at the original thickness of the material. Subsequently, the same portion is rolled for tapering in a vertical direction.

Abstract: A process of manufacturing a taper leaf spring by which rollers for measuring the length and the thickness are respectively disposed on the take-out side of a material plate for a taper leaf spring relative to a pair of rolling rollers, and also rollers for measuring the breadth are disposed on the same take-out side; rolling for regulating the breadth is beforehand performed by a pair of edge rollers on the take-in side of the material plate relative to the pair of rolling rollers; the distance of the interval between both rolling rollers is adjusted by comparing signals coming from the rollers for measuring the length and the thickness with the standard signals based on the predetermined specifications of the length and the thickness; the regulation of the breadth by means of the pair of edge rollers is controlled by comparing the signal from the breadth measuring rollers with the standard signal based on the predetermined specification; so that the material plate is rolled to a taper as desired.

Abstract: In a method and apparatus for producing sheets or plates by hot rolling slabs in a number of passes, the slabs are alternately deformed more strongly and less strongly between a pair of rolls at least in one pass, and when the slabs are less strongly deformed, a condition according to which .alpha.' is equal to or smaller than .rho. is observed, while when the slabs are more strongly deformed, a condition according to which .rho. is smaller than .alpha. smaller than 2 .rho. is observed, .alpha. and .alpha.' being the angles of engagement and .rho. being the angle of friction, and differences in thickness in longitudinal direction of the slabs are levelled out in a subsequent pass.

Abstract: A stand speed reference circuit is disclosed for providing speed reference signals to each of a plurality of selected stands in a continuous tandem rolling mill.U.s. pat. No. 3,852,983 to Cook for "Work Strip Gauge Change During Rolling in a Tandem Rolling Mill" discloses a method for changing to a new gauge schedule without shutting down the mill, by using a precalculated multiplier to successively and progressively change the mill stand speeds of all the stands save the pivot stand, the speed of which remains constant at the previously scheduled rate. Interstand tension regulators between the stands automatically change the delivery gauge at the stand of entry of the gauge change point of the moving strip.The present disclosure provides an analog stand speed reference circuit to realize the Cook teaching without disturbing the mill by introducing spurious interstand tensions.

Abstract: A plurality of forming stations, each individually numerically controlled to sequentially roll form a blank into a tapered structural member, is disclosed. Each forming station includes upper and lower assemblies of forming rolls mounted on a pair of adjacent shafts so as to generally define an orifice through which the blank passes as it is roll formed. One of the shafts is continuously position adjustable, as are selected forming rolls of the forming roll assemblies. Thus, both the size and shape of the orifice are continuously adjustable. Position sensors continuously sense the positions of the position controllable shaft and forming rolls of each station and generate feedback signals related thereto. The feedback signals are continuously compared with numerical control signals received by a controller. The results of the comparisons produce error signals that are used to continuously control the position of the position controllable shafts and forming rolls.

Abstract: A rod or bar mill stand has two work-roll carrying mountings which are pivoted together on one side of the plane containing the roll axes and which are individually connected to synchronously driven eccentrices. The eccentric drives for the roll mountings, together with the pivotal connection, cause each of the roll axes to follow an eliptical or oval path, such that each roll approaches the pass line to reduce the work, over a part only of the path. The work rolls are driven about their own axes to induce forward movement of the work.