EP0161192A1 - Anstellverfahren für ein Schrägwalzwerk und Walzwerk zur Ausführung dieses Verfahrens - Google Patents

Anstellverfahren für ein Schrägwalzwerk und Walzwerk zur Ausführung dieses Verfahrens Download PDF

Info

Publication number
EP0161192A1
EP0161192A1 EP85420058A EP85420058A EP0161192A1 EP 0161192 A1 EP0161192 A1 EP 0161192A1 EP 85420058 A EP85420058 A EP 85420058A EP 85420058 A EP85420058 A EP 85420058A EP 0161192 A1 EP0161192 A1 EP 0161192A1
Authority
EP
European Patent Office
Prior art keywords
axis
rolling
cylinder
rolling mill
adjustment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP85420058A
Other languages
English (en)
French (fr)
Other versions
EP0161192B1 (de
Inventor
Jean-Marc Jour
Pierre Peytavin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vallourec SA
Original Assignee
Vallourec SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vallourec SA filed Critical Vallourec SA
Priority to AT85420058T priority Critical patent/ATE44247T1/de
Publication of EP0161192A1 publication Critical patent/EP0161192A1/de
Application granted granted Critical
Publication of EP0161192B1 publication Critical patent/EP0161192B1/de
Expired legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/16—Adjusting or positioning rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/008—Skew rolling stands, e.g. for rolling rounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
    • B21B1/20—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section in a non-continuous process,(e.g. skew rolling, i.e. planetary cross rolling)
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
    • B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers

Definitions

  • the invention relates to a method for adjusting a rolling mill with oblique cylinders, of the type used for rolling metal bars or tubes in order to obtain a high reduction ratio in a single pass.
  • the invention also relates to a rolling mill allowing the implementation of this adjustment method.
  • Such a process applies in particular to the hot rolling of bars or tubes, for example of steel.
  • Patent FR 1 576 091 describes, on pages 5 and 6 as well as in FIG. 2, a rolling mill with oblique cylinders comprising three working cylinders in the shape of a mushroom. These cylinders are arranged inside a cage formed by a casing (30), to which three cylinder supports (31) are fixed, distributed around the axis of the material to be laminated. The cage rotates around this axis, thanks to a motor whose drive pinion attacks a ring gear (37). The rotation of each cylinder (27) about its axis (36) is obtained by a planetary system comprising a toothed ring (32) fixed on a hollow shaft inside which the material to be laminated moves.
  • Three satellite systems mesh on this ring gear and each rotate a cylinder such as (27) by means of a couple of angle gears (35).
  • One of these pinions is mounted on the axis of the satellite (34), the other on the axis (36) of the rolling cylinder.
  • the adjustment means of a rolling mill of this type so as to adjust the advance to the desired value in particular as a function of the laminated diameter is described in the article by EJFE BREITSCHNEIDER published in Iron and Steel Engineer (October 1981 pages 51 to 54). It consists, (see page 51 left column), of rotating the axis of each rolling cylinder around the axis of the corresponding satellite, so as to obtain the desired degree of inclination which allows the advance.
  • This rotation of an axis around the other is carried out without modifying the angle which these two axes make between them which is imposed by construction, and can be, for example, of 60 ° (see page 52 left column).
  • This tilt the advance can, according to the author, vary from 0 to 10 °.
  • FR 1 576 091 describes a means for adjusting the rolling diameter. This means consists in sliding each working cylinder along its axis (36), by acting on an approach device (38), which makes it possible to vary the outlet section of the material to be laminated.
  • the adjustment of the outlet section obtained by sliding the cylinder along its axis, also has the disadvantage of displacing the rolling zone along the rolling axis.
  • the combination of such an axial displacement with the transverse displacement consecutive to the adjustment of the advance has for. effect of further disrupting the rolling conditions and therefore adversely affect the quality of the product, in particular as regards the surface condition and in the case of a tube the regularity of thickness.
  • French patent 1,475,645 describes another type of oblique rolling mill. with three cylinders in which a combined adjustment is made of the spacing of the rolls with respect to the rolling axis and the feed angle. For this each cylinder is mounted on two bearings arranged on either side of the cylinder. Figure 1 of this document shows that this combined adjustment is achieved by rotating around. from the rolling axis a flange which carries the three bearings located on the same side of the rolls.
  • This adjustment method has the disadvantage of causing a displacement of the working area of each cylinder in contact with the product.
  • the method applies to rolling mills the axis of the rolls of which is only slightly inclined relative to the rolling axis.
  • the present invention aims to provide a method of adjusting a rolling mill with oblique cylinders, making it possible to adjust the advance of the product during rolling virtually independently of the other adjustment parameters. It also relates to the possibility in such a rolling mill to vary within wide limits the diameter of the laminated products obtained, while preserving the optimal rolling conditions in particular by using the same set of rolling rolls.
  • the invention also relates to the possibility of developing a method for adjusting a rolling mill with three rolls, the axes of the rolls of which are inclined at least 30 ° relative to the rolling axis.
  • the invention also aims to produce a rolling mill making it possible to apply such an adjustment method and having a structure as compact and robust as possible as well as a minimum bulk.
  • the adjustment method according to the invention provides a particularly effective solution to these problems. It applies to rolling mills with oblique cylinders, used for the rolling of metal bars or tubes, comprising at least three cylinders distributed around the rolling axis, each of these rolls having a generally decreasing section revolution profile, at least in the part ensuring the reduction of the outside diameter of the product, since the entry side of the product to be laminated to the sport side of this product, and exerting pressure on this product through its contact zone so as to deform it.
  • the axis of revolution of each cylinder is inclined by an angle of inclination of between 20 "and 70 ° relative to a secant line, intersecting the axis of revolution of said cylinder, this line being perpendicular to the rolling axis and cutting said rolling axis.
  • This axis of revolution is oriented so as to approach the rolling axis, in the direction of the exit zone of the rolled product from the rolling mill.
  • the method consists in adjusting in advance while keeping constant the angle of inclination of the axis of revolution of each cylinder with respect to an adjustment axis constituted by a intersecting straight line as defined above and chosen so that it crosses the contact zone between the cylinder and the product to be laminated in the zone where the product is calibrated and by rotating the axis of revolution of each cylinder around the corresponding adjustment axis until the feed angle (A) between the rolling axis and the project ction of the axis of revolution on the plane passing through the rolling axis, and perpendicular to the adjustment axis, reaches the desired value.
  • the feed angle (A) is preferably set between 3 ° and 30 °.
  • the diameter of the rolled products obtained is adjusted by moving each cylinder along the adjustment axis, without modifying the angle of inclination of the axis of revolution relative to the adjustment axis.
  • the rolls of the same rolling mill are identical and their axes of revolution are inclined at the same angle relative to the corresponding adjustment axes.
  • the adjustment axes compete at the same point of the rolling axis.
  • the invention also relates to a rolling mill meeting the general characteristics which have just been given, provided with cylinder-carrying cages, in which inside each of the cages are disposed bearings which support the axis of revolution of a cylinder , said axis being connected by a transmission means to a rotary drive means, the cage itself being mounted in rotation around an adjustment axis, perpendicular to the rolling axis and intersecting said rolling axis, said adjustment axis crossing the surface of the cylinder in the zone of contact with the product where the calibration is carried out and cutting the axis of cylinder revolution; a positioning means makes it possible to orient the cage around the adjustment axis and to wedge it angularly in a position such that, the projection of the axis of revolution, on the plane passing through the rolling axis and perpendicular to the adjustment axis, make the desired feed angle with the rolling axis (A).
  • displacement and wedging means make it possible to move each of the cages parallel to itself along the adjustment axis, the corresponding rolling cylinder being moved simultaneously, and to wedge the cage at any location along this adjustment axis.
  • each rolling cylinder has a calibration zone at the end of the reduction deformation zone.
  • the adjustment axis crosses the surface of the cylinder in an area of this cylinder corresponding to the middle of the calibration area.
  • each rolling cylinder is driven by means of a pair of conical toothed pinions, by means of a motor shaft disposed either in the extension of the adjustment axis, or in a direction parallel or close to parallelism relative to the rolling axis.
  • the rolling mill according to the invention may comprise cages driven in rotation about the rolling axis at an equal speed and in the opposite direction to the speed of rotation of the bar or of the tube during rolling.
  • the drive of each cylinder can be carried out by planetary gear and satellite.
  • a link is then used by cardan or the like between the planet carrier shaft and the drive shaft of each cylinder to compensate for the deviations of this shaft with respect to the parallelism with the rolling axis.
  • the invention also relates to a rolling mill with oblique cylinders which allows the particularly advantageous implementation of the adjustment method according to the invention.
  • This rolling mill comprises, at each cylinder holder cage, a first means for adjusting the spacing of each cylinder relative to the rolling axis.
  • This first means comprises a screw / nut assembly, centered on the adjustment axis, the first of the two components, preferably the screw, is disposed at the periphery of the cylinder carrier cage and integral with it.
  • the second component is mounted to rotate freely on a bearing fixed relative to the rolling mill frame.
  • a rotary drive means makes it possible to rotate this second component with respect to the first, by the desired quantity, to move the cylinder holder cage, by the desired length, along the adjustment axis.
  • the rotation interval of the second component relative to the first is less than two turns.
  • the component free in rotation of the screw / nut assembly comprises a toothed ring which can be driven in rotation by a first motor means which actuates a toothed pinion which meshes on this ring.
  • the screw of the screw / nut assembly is constituted by a thread, produced at the periphery of the cylinder holder cage, the nut being a nut crown mounted in rotation on a bearing fixedly connected to the rolling mill frame. .
  • a second adjustment means comprises a rotary drive means which makes it possible to rotate the cylinder holder cage around the adjustment axis, under the action of a second motor means.
  • This makes it possible to orient the cylinder holder cage so as to give the cylinder the desired advance angle relative to the rolling axis.
  • a wedging means can make it possible to prevent the rotation of the free component in rotation of the screw / nut assembly, during the drive in rotation of the cylinder-holder cage around the adjustment axis. The action of this wedging means makes it possible, by acting only on the second adjusting means, to combine the advance angle and the spacing of the cylinder with respect to the rolling axis.
  • the means for driving in rotation of each cylinder holder cage is a pivot fixed to the periphery of this cage on which a rod actuated by the second motor means is articulated; it is advantageously a jack.
  • the pivot is advantageously mounted on a revolution ring fixed in rotation on the cylinder holder cage and surrounding the screw / nut assembly.
  • a means of synchronizing the angular displacements of all of the cylinder carrier cages connects these cages to each other, so as to impose at all times on their cylinders the same angle of advance relative to the rolling axis.
  • This synchronization means can for example be produced with articulated connecting means.
  • a prestressing means makes it possible to support the cylinder carrier cage on the frame, canceling the existing clearances, in particular at the screw / nut contact and at the level of the bearing against which door the free rotating component of the screw / nut assembly.
  • this prestressing means comprises a traction means, disposed along the adjustment axis, connected on the one hand to the cylinder holder cage and on the other hand to the frame.
  • This traction means applies a force on the cylinder holder cage oriented parallel to the adjustment axis and directed towards the frame.
  • This traction means is advantageously a jack.
  • a particularly effective method of using the rolling mill thus designed also forms part of the invention. It consists in using, during the rolling of a tube blank, the second adjustment means, so as to effect a combined variation of the angle of advance and the spacing of each cylinder relative to the axis. rolling, the movable component of the screw / nut assembly being rotated.
  • the first and second adjustment means can also be synchronized so as to superimpose on the variation in spacing combined with the variation in angle of advance, an independent variation in spacing which can be added or subtracted. of the first, in the direction of rotation of the free rotating component of the screw / nut assembly.
  • the oblique cylinder (2) is mounted on an axis of revolution (Y 0 Y 1 ) inside a cage (3) of generally cylindrical shape, in which it rests on bearings (4).
  • the cage (3) is itself rotatably mounted around an adjustment axis (Z O Z l ), perpendicular to the axis (X 0 X 1 ), and intersecting it.
  • This adjustment axis (Z 0 Z l ) intersects the axis (Y 0 Y I ), and crosses the surface of the cylinder in the zone of contact with the tube (1).
  • the point (5) of crossing of the surface of the cylinder by the axis (Z 0 Z 1 ) is located in the calibration zone, at the end of the conract zone on the outlet side of the tube, zone in which the work of the cylinder essentially consists in equalizing the cylindrical surface of the tube, so as to eliminate the corrugations of helical profile resulting from advance.
  • Figure 2 is a top view along the adjustment axis (Z 0 Z 1 ) of Figure 1.
  • the plane of this figure, perpendicular to (Z 0 Z 1 ) contains the axis (X 0 X 1 ). Only the cylinder (2) and the tube or bar (1) are shown, the cage (3) being removed.
  • the projection on the plane of the figure of the axis of revolution (Y 0 Y 1 ) makes with the axis (X 0 X 1 ) an angle (A).
  • This angle (A) is, by definition, the angle of advance of the cylinder (2) relative to the rolling axis.
  • This angle is adjustable by rotation of the cage (3) around the axis (Z 0 Z 1 ). It can for example be 10 °.
  • the angle of inclination (i) of the axis of revolution (Y 0 Y 1 ) relative to the adjustment axis (Z 0 Z 1 ) is about 45 °.
  • This angle is fixed and independent of the angle of advance. It can vary according to the characteristics of the rolling mills from around 20 ° to around 70 °.
  • the axis of revolution (Y 0 Y 1 ) is oriented so as to approach the rolling axis (X 0 X 1 ), in the direction of the exit zone of the rolled product from the rolling mill.
  • this axis does not intersect the rolling axis except when the feed angle (A) is equal to 0, which is never the case in the rolling position.
  • the rolling roll (2) has a profile of revolution whose section decreases towards the exit zone of the product to be laminated.
  • the profile of the generator of the cylinder is determined so as to smooth the surface of the bar by attenuating or eliminating the helical undulations which it may present.
  • the adjustment of the advance angle (A) is carried out by rotating the cage (3) around the adjustment axis (Zo Z l ) until it gives the desired angular orientation.
  • the feed angle (A) is adjusted to the desired value, by rotating, by known means and not shown, the cage (3) inside an annular envelope fixed (6), which is itself secured to the fixed structure of the rolling mill also not shown.
  • An angular wedging means (not shown) makes it possible to wedge the cage (3) in a determined angular position inside the envelope (6). It can be seen that, thanks to this method of adjusting the advance angle according to the invention, it is possible to vary the advance angle, within very wide limits, without significantly disturbing the rolling conditions.
  • the rotation of the cage around the axis (Zo Z 1 ) rotates the cylinder, in its zone of contact with the bar or the tube around the fixed point (5) which is on the axis adjustment.
  • This point (5) is normally located in the calibration zone (C) of the cylinder.
  • the reference mark (7) represents on the cylinder the limit between the calibration zone (C) and the reduction zone.
  • the rolling cylinder (2) is driven in rotation, whatever the adjustment position, by a pair of toothed bevel gears (8) and (9).
  • the pinion (8) is wedged on the shaft (10) which drives the cylinder around the axis (Y 0 Y 1 ).
  • the pinion (9) is wedged on the motor shaft (11) mounted on the axis (Zo Z 1 ) which drives it by means of a motor means not shown.
  • a rolling mill of this type comprises at least three stands, such as that shown in FIG. 1, whose adjustment axes, such as (Z 0 Z 1 ), are distributed around a rolling axis, such as (X 0 X 1 ). In the case of a rolling mill with three cylinders, these axes such as (Z 0 Z 1 ) are arranged; at 120 ° from each other around the axis (Xo X 1 ) and are concurrent.
  • the envelopes (6) most often occupy a fixed position in space, which facilitates the driving of the drive shafts (11) by suitable drive means.
  • the rotational speeds of these shafts are preferably synchronized.
  • Figure 3 is a view along the rolling axis of the outlet side of the rolled product of a rolling mill with three oblique rollers according to the invention.
  • the plane of the figure is perpendicular to the rolling axis, which is marked in (X 2 ).
  • These cylinders are mounted in cages (15, 16, 17) of cylindrical shape of revolution which can slide and rotate with a minimum of play inside annular envelopes (18, 19, 20) mounted integral with each other by the 'of the parts (55) (56) (57).
  • Each of these cages can rotate around one of the three axes of adjustment (Z 2 , Zg, Z 4 ) perpendicular to the rolling axis and concurrent in (X 2 ) in the case of the figure.
  • Each of these cages has the same adjustment means according to the invention. These means are shown, schematically, in the case of the cage (15). This comprises on its side wall a lug (21) which is held in an angular position determined by two screw stops (22, 23) which can be moved by engaging them more or less inside the housings threaded (24, 25) fixed on the casing (18).
  • the lug By screwing and unscrewing these stops, the lug can be moved transversely relative to the adjustment axis (Z 2 ) and therefore rotate the cage (15) by a determined angle and wedge it in a very precise angular position.
  • the angle of advance is thus adjusted as described above.
  • the cage (15) can be moved along the axis (Z 2 ) so as to adjust the exit section of the laminated bar.
  • Simple means of achieving this movement are constituted by adjustable stops.
  • the figure shows four stops comprising rods (26), (27), (28), (29) parallel to the axis (Z 2 ).
  • the rods (27) (28) which are pressure screws of adjustable length, are mounted screwed into threaded sleeves (31) (32) fixed on a cover (34) perpendicular to (Z 2 ) and integral with the envelope (18).
  • the rods (26) (29) which are hydraulic return rods of the cylinder rod type are mounted on bodies (30) (33) fixed on the cover (34) perpendicular to (Z 2 ) and integral with the casing (18).
  • the two rods (26) (29) have heads (35) (36) housed in an annular groove (37), having retaining edges (39), formed on the upper face (38) of the cage (15).
  • the two screw rods (27) (28) are in direct contact by their free ends (40) (41) on the face (38) while the rods (26) (29) exert a restoring force in the opposite direction .
  • the axial adjustment device with stops as described may comprise instead of two pressure screws such that (27) (28) a wedging at three or more points instead of two, the return rods such as (26) (29) being combined as required.
  • Each of the cages (16) (17) is adjusted axially, in the same way as the cage (15) by similar means not shown.
  • the three rolling rolls (12), (13) and (14) are thus adjusted with the same angle of advance (A) relative to the rolling axis and the same spacing relative to this axis.
  • each cylinder The drive in rotation of each cylinder is made by a pair of bevel gears (42) (43) shown in dashes.
  • Motor means not shown, drive motor shafts, arranged radially along the adjustment axes, such as the shaft (44).
  • a frame (45) keeps the assembly in a fixed position.
  • the products rolled by means of this rolling mill circulate through it, turning on themselves, along the rolling axis.
  • the maximum diameter of the part used during rolling is 800 mm of tubes whose finished outside diameter is between 200 and 400 mm without changing cylinders.
  • the finished diameter is obtained by adjusting for each desired diameter the angle of advance (A) and the radial position of the cylinders according to their respective adjustment axis (Z 2 , Z 3 , Z 4 ).
  • Figures 4 and 5 show an alternative embodiment of the method and the device according to the invention. It is a rolling mill with three oblique cylinders of which only one cylinder is shown.
  • Figure 4 is an elevational view in section passing through the adjustment axis.
  • Figure 5 is a top view along the axis (Z 5 Z 6 ) of Figure 4.
  • the cylinder (46) rotates around an axis of revolution (Y 5 Y 6 ) inside a cylindrical cage of revolution (47).
  • This cage can rotate around an adjustment axis (Z 5 Z 6 ), or slide along it inside a fixed annular envelope (48).
  • the axis (Z 5 Z 6 ) is perpendicular and intersects the rolling axis (X 3 X 4 ).
  • the adjustment axis passes through the wall of the cylinder (46) in its zone of contact with the tube (49), during rolling, in accordance with the invention.
  • the cylinder (46) is rotated by means of a pair of toothed bevel gears (50) (51).
  • the pinion (51) is mounted on the motor shaft (52) perpendicular to the adjustment axis (Z 5 Z 6 ), which is driven by a motor not shown.
  • This shaft (52), as shown in Figures 4 and 5, is mounted so as to move as little as possible from the parallelism with respect to the rolling axis (X 3 X 4 ).
  • the shaft (52) is arranged by construction inside the cage (47) so that, in projection on the plane of FIG. 5, it forms, with the projection on this same plane of the axis of revolution (Y 5 Y 6 ), an angle (B) whose value is close to the average value that we give to the angle (A) of the cylinder (46).
  • This arrangement makes it possible to connect the drive shaft (52) to a drive means whose shaft is substantially parallel to the rolling axis.
  • one or more articulated connections are provided, such as cardan joints and extensions between the shaft (52) and the shaft of the drive means. Such a connection is shown schematically in (53).
  • Such an arrangement makes it possible to produce a rolling mill with three cylinders comprising cages which are themselves driven in rotation about the rolling axis (X 3 X 4 ) by their casings, which in turn are mounted in rotation relative to a fixed frame.
  • the cages By giving the cages an equal and opposite direction of rotation to that of the product being rolled, this product can be laminated without rotating relative to the frame of the rolling mill.
  • This facilitates the introduction and extraction of the products being rolled, which is particularly advantageous in the case of products of great lengths.
  • it is also possible to drive each cylinder by planetary and satellite gear. It suffices to provide an articulated connection, for example a cardan joint between the planet carrier shaft and the drive shaft of each cylinder, such as the shaft (52).
  • Figures 6 to 10 show another embodiment of a rolling mill with oblique cylinders according to the invention comprising special means for adjusting the spacing of the rolls relative to the rolling axis, as well as the angle d 'advance of these cylinders with respect to this same axis.
  • FIG. 6 is a schematic overall view, on the downstream side, of a rolling mill with three oblique rolls according to the invention, used for laminating a tube blank (101).
  • the image axis (X 5 ) is perpendicular to the plane of the figure.
  • the three cylinders (102, 103, 104) are mounted in cylinder carrier cages (105, 106, 107) themselves connected by base plates (108, 109, 110) to the frame (111) of the rolling mill.
  • This frame is in two parts, articulated with respect to each other around the axis (X 6 ) perpendicular to the plane of the figure.
  • the ends (112, 113) of these two parts are held in abutment against one another at (114), thanks to a jack not shown.
  • the opening of the frame makes it possible to avoid breakage of parts.
  • Three cylinders make it possible to vary the angle of advance of the cylinders (102,. 103, 104) and also, in a combined manner, the spacing of these cylinders.
  • the bodies of these jacks are articulated on the frame (111) at (118, 119, 120).
  • Their rods (121, 122, 123) are articulated on pivots (124, 125, 126) fixed on rings (127, 128, 129) which are themselves respectively fixed to cylinder holder cages (105, 106, 107).
  • the jacks make it possible to rotate the axes, such as (Y 7 ), (see FIG. 7) of the cylinders, such as (102), around their adjustment axes such as (Z 7 ).
  • Figure 7 is a sectional view of the cylinder holder cage (105),. along a plane passing through the rolling axis (X 5 ) and through the adjustment axis (Z 7 ) which are, according to the invention concurrent and perpendicular.
  • the axis (Y 7 ) of the cylinder (102) intersects at (M) the adjustment axis at an angle ( ⁇ ) of about 30 °.
  • This axis (Y 7 ) is shown in the plane of Figure 7. Its inclination relative to. the rolling axis (X 5 ) is in this condition about 60 °, the angle of advance then being zero.
  • the cylinder (102) is set in rotation relative to the cylinder-carrying shaft (130), of revolution, by means of the threaded end rod (131) which is screwed into the threaded housing (132) of the cylinder (102 ).
  • An opening (133) is provided in the frame. (111) for screwing or unscrewing the rod (131).
  • the cylinder holder shaft (130) is rotatably mounted around (Y 7 ) by means of bearings (134, 135, 177) bearing on the cylinder holder cage (105). These bearings are designed, in a known manner, to withstand the rolling forces.
  • the cylinder-holder shaft (130) comprises a conical crown (136), fixed in rotation on it, on which meshes a conical pinion (137) mounted on a shaft (138). This arrangement is similar to that shown in Figure 4.
  • the axis (X 7 ) of the shaft (138) is in the plane of the figure. Under the rolling conditions, this axis makes an angle with the plane of the figure which corresponds to the feed angle.
  • the shaft (138) is connected to a drive shaft, not shown, by one or more articulated connections, such as universal joints, which are also not shown.
  • the cylinder holder cage (105) comprises an annular zone (139), of axis (Z 7 ), provided with a male thread (140).
  • This thread has fewer than three threads and its pitch is calculated so as to achieve a determined relationship between the variation of angle of advance and the combined variation of the spacing of the rolls, relative to the rolling axis (X 5 ) that we want to obtain.
  • This relationship is mainly a function of the dimensions of the tube blanks, the mechanical characteristics of the metal, under the rolling conditions, and the reduction rates that it is proposed to achieve.
  • a nut ring (141) is provided with a female thread (142) engaged with the male thread (140) which constitutes the screw of this screw / nut assembly.
  • the ring (141) is mounted to rotate freely on a bearing (143) which also includes a centering and retaining ring (144) which ensures the centering of the ring (141) relative to the axis (Z 7 ) and keeps it pressed against the base plate (108).
  • the nut ring (141) comprises a toothed ring (145), on which meshes a toothed pinion (146) mounted on an axis (147) which passes through the frame (111) and is rotated by a first motor means such that 'a hydraulic motor shown in (176) (see Figures 9 and 10).
  • This arrangement is a first means of independent adjustment of the spacing of the cylinder (102) relative to the rolling axis (X 5 ).
  • the rotation of the nut ring (141) in one direction or in the another causes a displacement of the cylinder holder cage (105) along the adjustment axis and therefore a variation in the spacing of the cylinder (102) relative to the rolling axis (X 5 ). It is possible, in a known manner, to drive the nut ring (141) by the first drive means independently, or in conjunction with the drive of the two other nut rings (149, 150) which move each of the two other cylinder holder cages (106, 107).
  • the base plate (108) is fixed by known means, such as screws not shown, to the frame (111).
  • the ring (127), mounted in revolution with respect to the axis (Z 7 ) is locked in rotation on the cylinder holder cage (105) and surrounds the screw / nut assembly (140, 141).
  • It comprises a control pivot (124) with an axis (Xg) parallel to (Z 7 ) on which the end of the rod (121) of the jack (115) shown in FIG. 6 is articulated.
  • the rotation drive of the ring (127) around the axis (Z 7 )) allows a combined adjustment of the feed angle and the spacing of the cylinder (102) relative to the rolling axis (X 5 ) the nut ring (141) being locked in rotation by known means.
  • a rotation of the ring (127), seen along Fl, in a clockwise direction brings the cylinder (102) closer to the axis (X 5 ) in the case of a screw-nut system having a pitch to the right and increasing the angle of advance, initially equal to zero.
  • the articulations of the cylinder rods (121, 122, 123) around the control pivots (124, 125, 126) and those (118, 119, 120) of the cylinder bodies (115, 116, 117) on the frame (111 ) are designed to allow, in known manner, the displacement of the pivots (124, 125, 126) parallel to the axis (Z 7 ) within the limits of adjustment of the spacing of the cylinders relative to the axis (X S ).
  • FIG. 8 shows the synchronization means used in the case of the present rolling mill.
  • Two levers bent at 120 ° are each articulated around a pivot (156, 157) fixed on the frame (111) and with an axis parallel to (X 5 ).
  • the axis of each of these pivots intersects a bisector of the angle of 120 ° formed by two adjustment lines.
  • the angular displacements of these levers (154, 155) are synchronized by a link (158) articulated at (159, 160) at the ends of the arms (161, 162) of these levers.
  • the axes of the articulation points (156, 159, 160, 157) are parallel to the rolling axis (X 5 ) and form the vertices of a deformable parallelogram.
  • Each of the three synchronization pivots (151, 152, 153) is connected to an arm of one of the two levers (154, 155) by an identical link (163, 164, 165) at the articulation points (166, 167, 168).
  • a prestressing means such as (169) allows to exert a traction on each cage along the adjustment axis (Z 7 ) in the direction of the frame (111).
  • This device comprises a traction rod (170) with an axis (Z 7 ), screwed onto the top of the cylinder holder cage (105). This rod passes through a jack whose body (171) is integral with the frame (111).
  • An annular piston (172) slides in the body (171) and exerts a push on the flange (173), via the annular bearing (174), when a pressurized fluid is introduced into the annular chamber (175) by a pipe not shown.
  • the collar (173) is integral with the rod (170).
  • Such a rolling mill has the advantage of a very large compactness combined with great robustness and great rigidity. This results from the use of a screw / nut assembly, mounted at the periphery of each cylinder holder cage which minimizes the radial size.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Control Of Metal Rolling (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Laminated Bodies (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Rollers For Roller Conveyors For Transfer (AREA)
  • Massaging Devices (AREA)
EP85420058A 1984-03-28 1985-03-26 Anstellverfahren für ein Schrägwalzwerk und Walzwerk zur Ausführung dieses Verfahrens Expired EP0161192B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85420058T ATE44247T1 (de) 1984-03-28 1985-03-26 Anstellverfahren fuer ein schraegwalzwerk und walzwerk zur ausfuehrung dieses verfahrens.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8405424 1984-03-28
FR8405424A FR2561950B1 (fr) 1984-03-28 1984-03-28 Procede de reglage d'un laminoir a cylindres obliques et laminoir pour la mise en oeuvre de ce procede

Publications (2)

Publication Number Publication Date
EP0161192A1 true EP0161192A1 (de) 1985-11-13
EP0161192B1 EP0161192B1 (de) 1989-06-28

Family

ID=9302890

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85420058A Expired EP0161192B1 (de) 1984-03-28 1985-03-26 Anstellverfahren für ein Schrägwalzwerk und Walzwerk zur Ausführung dieses Verfahrens

Country Status (11)

Country Link
US (1) US4660398A (de)
EP (1) EP0161192B1 (de)
JP (1) JPS60221105A (de)
KR (1) KR910002719B1 (de)
AT (1) ATE44247T1 (de)
BR (1) BR8501401A (de)
CA (1) CA1260737A (de)
DE (1) DE3571209D1 (de)
ES (1) ES8704093A1 (de)
FR (1) FR2561950B1 (de)
MX (1) MX162850B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2604929A1 (fr) * 1986-10-14 1988-04-15 Vallourec Dispositif d'accrochage rapide assurant la retenue d'un mandrin rotatif

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10261057A1 (de) * 2002-12-24 2004-07-22 Sms Meer Gmbh Walzenanordnung für ein Walzwerk
CN109772890B (zh) * 2019-02-28 2020-01-31 西北工业大学 一种大尺寸高温合金棒材的超细晶轧制方法
CN112044950B (zh) * 2020-08-13 2021-06-01 西北工业大学 大尺寸超细珠光体中碳钢棒材3d-spd成形方法
CN113843379B (zh) * 2021-10-26 2022-04-22 宁波大学 一种成形阶梯轴的三辊斜轧装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR811256A (fr) * 1936-10-03 1937-04-10 Timken Roller Bearing Co Procédé de laminage de tubes et laminoir pour sa mise en pratique
FR1475645A (fr) * 1965-07-23 1967-04-07 Vallourec Nouveau laminoir à tubes et procédé utilisé pour la mise en oeuvre de ce laminoir
DE3131790A1 (de) * 1980-10-11 1982-07-08 SMS Schloemann-Siemag AG, 4000 Düsseldorf Schraegwalzwerk zum reduzieren von voll- und hohlquerschnitten
DE3044672A1 (de) * 1980-11-27 1982-07-22 SMS Schloemann-Siemag AG, 4000 Düsseldorf Schraegwalzwerk zum reduzieren von voll- und hohlquerschnitten
FR2530502A1 (fr) * 1982-07-20 1984-01-27 Mo I Stali I Splavov Procede de laminage de demi-produits metalliques et demi-produits metalliques obtenus par ledit procede

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1234245A (en) * 1915-07-20 1917-07-24 Ludwig Wolffgram Rolling-mill for seamless tubes.
SU380376A1 (ru) * 1971-06-28 1973-05-15 Московский институт стали , сплавов Рабочая клеть косовалкового стана
SU538797A1 (ru) * 1974-08-08 1976-12-15 Предприятие П/Я А-7697 Рабоча клеть стана поперечно-винтовой прокатки
SU655440A1 (ru) * 1976-05-21 1979-04-08 Электростальский Завод Тяжелого Машиностроения Рабоча клеть стана поперечновинтовой прокатки
SU598669A1 (ru) * 1976-06-28 1978-03-25 Уральский ордена Трудового Красного Знамени политехнический институт им. С.М.Кирова Привод валка стана винтовой прокатки
CH609261A5 (de) * 1976-06-30 1979-02-28 Grob Ernst Fa
SU733748A1 (ru) * 1978-01-02 1980-05-15 Предприятие П/Я Г-4361 Рабоча клеть стана поперечно-винтовой прокатки
DE2814493C3 (de) * 1978-03-31 1980-12-18 Mannesmann Ag, 4000 Duesseldorf Schrägwalzwerk
JPS594905A (ja) * 1982-06-30 1984-01-11 Sumitomo Metal Ind Ltd 中空棒材の製造方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR811256A (fr) * 1936-10-03 1937-04-10 Timken Roller Bearing Co Procédé de laminage de tubes et laminoir pour sa mise en pratique
FR1475645A (fr) * 1965-07-23 1967-04-07 Vallourec Nouveau laminoir à tubes et procédé utilisé pour la mise en oeuvre de ce laminoir
DE3131790A1 (de) * 1980-10-11 1982-07-08 SMS Schloemann-Siemag AG, 4000 Düsseldorf Schraegwalzwerk zum reduzieren von voll- und hohlquerschnitten
DE3044672A1 (de) * 1980-11-27 1982-07-22 SMS Schloemann-Siemag AG, 4000 Düsseldorf Schraegwalzwerk zum reduzieren von voll- und hohlquerschnitten
FR2530502A1 (fr) * 1982-07-20 1984-01-27 Mo I Stali I Splavov Procede de laminage de demi-produits metalliques et demi-produits metalliques obtenus par ledit procede

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2604929A1 (fr) * 1986-10-14 1988-04-15 Vallourec Dispositif d'accrochage rapide assurant la retenue d'un mandrin rotatif
EP0267128A1 (de) * 1986-10-14 1988-05-11 Vallourec Industries Vorrichtung zum schnellen Einhaken einer drehenden Dornstange

Also Published As

Publication number Publication date
FR2561950B1 (fr) 1987-11-13
ATE44247T1 (de) 1989-07-15
CA1260737A (fr) 1989-09-26
ES8704093A1 (es) 1987-03-16
KR850007003A (ko) 1985-10-30
BR8501401A (pt) 1985-11-26
FR2561950A1 (fr) 1985-10-04
ES541614A0 (es) 1987-03-16
JPH0378164B2 (de) 1991-12-12
DE3571209D1 (en) 1989-08-03
EP0161192B1 (de) 1989-06-28
US4660398A (en) 1987-04-28
MX162850B (es) 1991-06-28
KR910002719B1 (ko) 1991-05-03
JPS60221105A (ja) 1985-11-05

Similar Documents

Publication Publication Date Title
FR2591919A1 (fr) Machine-outil pour laminer par refoulement des pieces cylindriques creuses
CH683894A5 (fr) Dispositif micrométrique pour la finition d'un alésage de haute précision.
FR3026454A1 (fr) Mecanisme de vis a rouleaux et procede de fabrication associe
EP0192584B1 (de) Verfahren und Vorrichtung zum Herstellen von Rillen auf einer Abwicklungswand
EP0161192B1 (de) Anstellverfahren für ein Schrägwalzwerk und Walzwerk zur Ausführung dieses Verfahrens
FR2707534A1 (fr) Dispositifs de rainurage de tubes.
FR2567057A1 (fr) Appareil de meulage de plaques de verre
FR2560077A1 (fr) Laminoir a trois cylindres obliques coniques
EP0569307B1 (de) Vorrichtung zur Formung von schraubenförmigen Rippen an der Aussenfläche eines Rohres
EP0860228A1 (de) Vorrichtung zum Trennen und/oder Bearbeiten von Rohren
BE1008111A3 (fr) Taraud machine.
FR2544234A1 (de)
EP0952896B1 (de) Vorrichtung zum biegen von rohren mit kleinen durchmesser
FR2554747A1 (fr) Outil pour le tronconnage de tubes
FR2659879A1 (fr) Dispositif de dressage d'un fil metallique.
EP0074942A1 (de) Untersetzungsgetriebe
EP0599685A1 (de) Vorrichtung zum Schneiden von Spalten durch ein Rohr
EP0463433A1 (de) Einstellbare Führungsbüchse für Drehautomat mit bewegendem Spindelstock
FR2537893A1 (fr) Machine a dresser des tubes ou des barres, dont les outils de dressage consistent en au moins un cylindre creux a surface interne convexe
FR2696961A1 (fr) Procédé et appareil pour former par tournage une entaille concave dans une pièce, telle qu'une fiche de connexion souple et connexion souple obtenue à l'aide de ce procédé.
FR2558396A1 (fr) Procede de laminage de tubes au pas de pelerin, laminoir pour sa mise en oeuvre et tubes lamines conformement audit procede
EP0267128B1 (de) Vorrichtung zum schnellen Einhaken einer drehenden Dornstange
FR2479053A1 (fr) Procede de finition par galetage d'un filet helicoidal d'engrenage
BE896270A (fr) Cage de laminoir pour laminage helicoidal
FR2556419A1 (fr) Machine d'attaque a helice pour le forage de puits

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT DE FR GB IT SE

17P Request for examination filed

Effective date: 19851126

17Q First examination report despatched

Effective date: 19870316

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: VALLOUREC S.A.

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT DE FR GB IT SE

REF Corresponds to:

Ref document number: 44247

Country of ref document: AT

Date of ref document: 19890715

Kind code of ref document: T

ITF It: translation for a ep patent filed

Owner name: ING. A. GIAMBROCONO & C. S.R.L.

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3571209

Country of ref document: DE

Date of ref document: 19890803

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
EAL Se: european patent in force in sweden

Ref document number: 85420058.1

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20020314

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20030220

Year of fee payment: 19

Ref country code: AT

Payment date: 20030220

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20030224

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20030225

Year of fee payment: 19

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031127

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040326

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040326

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040327

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041001

EUG Se: european patent has lapsed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20040326