EP1448322B1 - Verfahren und vorrichtung zur stabilisierung eines mit grosser geschwindigkeit laufenden bandförmigen produktes - Google Patents

Verfahren und vorrichtung zur stabilisierung eines mit grosser geschwindigkeit laufenden bandförmigen produktes Download PDF

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Publication number
EP1448322B1
EP1448322B1 EP02790556A EP02790556A EP1448322B1 EP 1448322 B1 EP1448322 B1 EP 1448322B1 EP 02790556 A EP02790556 A EP 02790556A EP 02790556 A EP02790556 A EP 02790556A EP 1448322 B1 EP1448322 B1 EP 1448322B1
Authority
EP
European Patent Office
Prior art keywords
band
face
air
deflecting member
pressure
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.)
Expired - Lifetime
Application number
EP02790556A
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English (en)
French (fr)
Other versions
EP1448322A1 (de
Inventor
Thierry Malard
Marc Valence
Christian Viel
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.)
Clecim SAS
Original Assignee
Siemens VAI Metals Technologies SAS
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Filing date
Publication date
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Publication of EP1448322A1 publication Critical patent/EP1448322A1/de
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Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/34—Feeding or guiding devices not specially adapted to a particular type of apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/02—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring flatness or profile of strips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B41/00—Guiding, conveying, or accumulating easily-flexible work, e.g. wire, sheet metal bands, in loops or curves; Loop lifters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/02—Winding-up or coiling
    • B21C47/04—Winding-up or coiling on or in reels or drums, without using a moving guide
    • B21C47/06—Winding-up or coiling on or in reels or drums, without using a moving guide with loaded rollers, bolts, or equivalent means holding the material on the reel or drum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H18/00—Winding webs
    • B65H18/08—Web-winding mechanisms
    • 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
    • B21B1/40—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 foils which present special problems, e.g. because of thinness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B21B2003/001—Aluminium or its alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B2015/0064—Uncoiling the rolled product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B41/00—Guiding, conveying, or accumulating easily-flexible work, e.g. wire, sheet metal bands, in loops or curves; Loop lifters
    • B21B41/08—Guiding, conveying, or accumulating easily-flexible work, e.g. wire, sheet metal bands, in loops or curves; Loop lifters without overall change in the general direction of movement of the work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/30—Suction means
    • B65H2406/35—Other elements with suction surface, e.g. plate or wall
    • B65H2406/351—Other elements with suction surface, e.g. plate or wall facing the surface of the handled material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2601/00—Problem to be solved or advantage achieved
    • B65H2601/20—Avoiding or preventing undesirable effects
    • B65H2601/21—Dynamic air effects
    • B65H2601/211—Entrapping air in or under the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/173—Metal

Definitions

  • the subject of the invention is a method and a device for stabilizing and guiding a product traveling at high speed in a longitudinal direction, in particular in a cold rolling plant for metal strips, more particularly thin sheets of foil. aluminum.
  • a cold rolling plant of a strip metal product generally comprises one or more rolling mill stands each comprising two working rolls resting on support rolls and associated with means for controlling the movement of the roll. the band between the working rolls.
  • the web runs from a spool on an upstream side of the cage (s) and coils on a downstream winder.
  • the installation also comprises numerous additional members such as means for introducing the strip into the rolling mill stands, means for adjusting the rotational speeds of the various members and a certain number of deflection rollers that can have a position. adjustable and on which the strip is applied so as to be guided along a determined path.
  • a facility for rolling very thin sheets, in particular of aluminum generally comprises a single roll-to-roll rolling mill between a reel and a rewinder.
  • a roll stand comprises two spaced apart columns between which are mounted a set of rolls, for example, in the case of a quarto cage, two working rolls respectively associated with two support rolls.
  • Each cylinder is rotatably mounted at its ends on bearings carried by chocks slidably mounted between the column posts of the cage and clamping means resting on the chocks of the support cylinders make it possible to achieve the desired thickness reduction on the rolled strip.
  • the thickness range can range from 3 to 300 micrometers.
  • the equipment of the installation must, of course, be adapted to such fine thicknesses, in particular for winding the coil.
  • the figure 1 schematically represents a rolling installation of an aluminum foil comprising a roll stand A placed between a unrolling machine D carrying a reel B 1 and a reel E on which a roll B 2 is formed after passing the product M between the rolls of working of the rolling mill A.
  • the belt M On its path between the unwinder and the winder, the belt M is guided by a certain number of deflection rollers D.
  • a roller D 1 of flatness measurement is placed downstream of the cage A in order to detect any defects to be corrected by acting on means for adjusting the rolling conditions.
  • a feed roller D 2 adjustable level, adjusts the winding angle of the band on the flatness roller D 1 .
  • This roller D 2 can be spread upwards to facilitate the engagement of the strip on the winder E.
  • the installation of the figure 1 is shown only by way of example, other types of installation that can be used.
  • a rolling mill comprising several cages successively placed in the path of the strip in order to achieve a gradual reduction in thickness or alternatively reversible rolling carried out alternately in one direction and in the other, the rolling mill. being associated with two winders that work alternately in unwinding and winding.
  • the rolled strip can undergo a number of treatments, either upstream or downstream of the rolling and, in the most recent installations, it is sought to achieve as much as possible these various treatments in a continuous line.
  • the small thickness of the rolled metal strip causes a particular operation of the installation because the length of a coil can be several tens of thousands of meters and the duration a rolling pass can therefore reach several hours. Under these conditions, it is not a question of reversible rolling.
  • the object of the invention is to remedy such disadvantages by means of a method and a device making it possible to ensure the stability of the scrolling and the winding of the strip, even at very high rolling speeds and, thus, significantly increase the productivity of a plant without any significant change in it.
  • a cushion of air is formed between the sheet and the roll, which, in the case of a deflector roll or anger, may disturb the guiding the band, the latter being slightly raised and can therefore move laterally.
  • the pulling force that can be applied is relatively low and a suction nozzle placed near the The line of contact between the belt and the reel could deflect the belt which, while sticking to the suction element, could be damaged or even torn.
  • the invention therefore relates generally to a method and a device for stabilizing the high-speed movement, in a longitudinal direction of a band coming from a contact line, on at least one angular sector of a rotating surface of revolution about an axis transverse to the running direction, and connecting tangentially to the rotating surface forming, on the upstream side in the direction of travel, a dihedral limited on one side by an outer face of the rotating surface and the other, by an inner face of the strip along which part of the ambient air forms a boundary layer driven with the strip towards the nip, a deflection member being placed in the dihedral so as to modify the conditions of circulation of the air entrained with the band, said deflection member having a first side facing the inner face of the band and a second side facing towards the outer face of the rotating surface.
  • At least the first face of the deflection member is inclined towards the inner face of the strip, in the running direction thereof and is provided with at least one orifice opening into an internal space formed inside the deflection member and connected to an outer zone, said inclined face forming, with the inner face of the strip, a convergent in which the pressure increases with respect to the pressure in the internal space), the difference pressure determining the evacuation, through the orifice of the inclined face and the internal space, a certain air flow and the recess of the remaining part of the air mass constituting the boundary layer driven with the band .
  • the internal space of the deflection member is not connected to a suction fan but simply to an external zone at atmospheric pressure, the circulation of the air thus occurring naturally, without any real suction, at the level of the deflection member.
  • the second face of the deflection member, facing the rotating surface is inclined relative thereto, so as to form a convergent determining a pressure increase of the air entrained with the rotating surface, of which a portion is discharged to the outer zone connected to the internal space through at least one orifice in said second face.
  • Such a stabilizing device according to the invention can be applied either to a baffle roll with a cylindrical profile determining a change of direction of the strip running plane, or to the coil winding of the strip in order to avoid the air entrainment between the superimposed turns.
  • the air deflection member In the case of a coil winding, the air deflection member consists of a hollow section, mounted on an adjustable support means depending on the diameter of the coil, so as to maintain the body of deviation in an optimal position relative to the inner face of the strip, as and when winding thereof in a coil.
  • this support arm of the air deflection member has a variable length and is rotatably mounted about an axis parallel to the axis of the coil, said arm being associated with means for adjusting its sound. orientation and its length depending on the diameter of the coil, for the positioning of the profiled member inside the dihedral upstream.
  • the adjustable support means of the deflection member is mounted on a wrapper associated with the spool to facilitate the beginning of winding of the strip, the support means being folded in the template of the wrapper when it is in winding start position and unfolded after winding a few turns and spacing of the wrapper, so as to place the deflection member near the nip , at the end of the dihedral upstream.
  • the invention also covers the use, in a rolling installation of metal strips, in particular of aluminum, of such a stabilizing device which can be placed upstream of at least one deflection roll, in order to ensure direct application of the strip on the roll without the interposition of a layer of air.
  • This deflector roll may advantageously be a flatness measuring roller, the device thus making it possible to avoid disturbance of the measurement by air entrainment between the strip and the roll.
  • the invention can also be advantageously used for winding the rolled strip on a reel placed at the end of the line, the stabilizing device then being placed upstream of the contact line with the coil already wound in order to avoid the There is no air entrainment between the turns and to ensure the guiding stability of the band during the winding.
  • the figure 1 shows, schematically, the assembly of a rolling plant of an aluminum sheet-which takes place from a coil B 1 and is rewound at the exit of the rolling mill A to form a new coil B 2 .
  • the band M is guided by a plurality of deflection rollers which provide the scroll stability, in particular, a flatness measuring roll D 1 and an embossing roll D 2 .
  • a looper D 3 consists of two fixed rollers flanking an adjustable level central roll, used to regulate the tension-upstream of mill A.
  • the rolling mill A schematically represented on the figure 1 and more in detail on the figure 3 can be, for example, of the quarto type comprising two working rolls 1, 1 'supported respectively on support cylinders 11, 11' and each rotating around a shaft carried at its ends by chocks respectively 12, 12 ', 13, 13' which are slidably mounted along vertical guide faces 14 provided on two fixed columns 10 constituting the roll stand.
  • the strip Downstream of the rolling mill, the strip passes successively on a roll 15 of flatness measurement and on a loading roller 16 which is slidably mounted on the two columns 10 of the cage and whose position can be adjusted by a jack 17 according to the the nature of the metal and the thickness of the strip in order to adjust the angle of application on the flatness roller 15.
  • the winder E on which the rolled coil B 2 is formed comprises, in a conventional manner, an expandable mandrel 2 mounted cantilevered on a frame 21 and driven in rotation about its axis 20.
  • the winder E is associated with a wrapper F mounted on a frame 22 articulated on the columns 10 of the rolling mill about an axis 23 parallel to the running plane of the band M and which can rotate, under the action of a means not shown, between a raised position and a remote position.
  • the wrapper F comprises an open portion 24 which, in the raised position of the frame 22, is engaged on the mandrel 2 of the winder E.
  • the loading roller 16 is raised by the jack 17 in a spaced position 16 'allowing the passage of the head M 1 of the band M- and its engagement on the mandrel 2.
  • Known means provided in the part 24 of the wrapper F and not shown in the figure, support the head of the band for facilitate the beginning of the winding in superimposed turns.
  • the wrapper F is removed by the jack 24 to move to the position shown on the figure 3 .
  • a coil 3 is formed whose diameter increases progressively, as indicated on FIG. figure 3 .
  • the band M thus connects tangentially to the coil 3, along a line of contact 30 parallel to the axis 20 of the mandrel 2, forming a dihedral angle G with the outer face 31 of the coil 3 facing the upstream relative to the direction of scrolling.
  • This boundary layer 43 accompanies the band 4 in its movement and abuts against the coil 3, the outer face 31 facing upstream, that is to say the opposite of the direction of travel, shape, with the inner face 41 of the band 4, a dihedron G which converges towards a line of contact 30 of the band 4 with the last wound coil 32.
  • This blocking, upstream of the contact line 30, of the air entrained along the face 41 of the strip determines a pressure increase which can cause a slight uplift of the strip 4 and the introduction a thin layer of air between the inner face 41 of the strip 4 and the coil 3.
  • the idea of the invention is to achieve aerodynamic conditions of air circulation in the upstream dihedron G for detaching the boundary layer 43 upstream of the nip 30.
  • This recess of the boundary layer 43 is obtained by discharging outwardly a portion of the air flow entrained with the strip, by means of a deflection member 5 placed in the upstream dihedron G and extending between the inner face 41 of the strip and the outer face 31 of the coil, parallel to the contact line 30.
  • This deflection member 5 consists of a hollow section having at least one face 50 facing the inner face 41 of the strip 4 and inclined relative thereto, in the direction of travel, so as to form a convergent C 1 whose section decreases gradually causing an increase in pressure of the air entrained with the band in the boundary layer 43.
  • This inclined face 50 is provided with a plurality of slot-shaped orifices 55 which open into the internal space 51 formed inside the hollow profile 5.
  • the latter is closed at its ends and provided with an orifice connected by a pipe 53 to an external zone 54 located, for example, at atmospheric pressure.
  • the increase, by wedge effect, of the pressure in the convergent C 1 thus determines the passage in the slots 55 of a portion of the air entrained in the boundary layer 43 which escapes via the pipe 53 to the zone at lower pressure 54.
  • the flow of air entrained towards the contact line 30 decreases and the boundary layer 43 is thus detached from the inner face 41 of the band 4 to catch on the inclined face 50 of the deflection 5 forming a laminar flow stream which escapes through the slot 55 and the conduit 53.
  • the pressure of the entrained air only increases to the downstream end of the deflection member 5 and then decreases.
  • the pressure being lower upstream of the contact line 30, the air is not likely to penetrate between the last turn 32 of the coil 3 and the turn 33 being formed.
  • the second face 50 'of the deflection member 5 facing the winding surface 3 is also inclined with respect thereto so as to form a second convergent C 2 which progressively increases the pressure of the air entrained by the rotation of the coil 3.
  • This second inclined face 50 ' is also provided with a slot 55' which opens into the internal space 51 of the hollow section 5.
  • the pressure difference between the two convergent C 1 , C 2 and the outlet 54 of the exhaust pipe 53 determines a natural circulation of the air passing through the slots 55, 55 '.
  • the width of the strip and, therefore, the length of the profile 5 and the length of the exhaust pipe 55 are too great and may result in a high pressure drop, given the dynamic overpressure due at the rotational speed of the coil, it may be preferable to connect the exhaust pipe 53 to a suction device.
  • it is simply intended to compensate the pressure drop in the circuit and not to achieve a real aspiration of air into the dihedral top downstream of the deflection member 5. This avoids the risk deterioration of the band by application thereof on the downstream end 52 of the deflection member 5, even in the case where the band is subjected to a relatively low traction force.
  • the shape of the hollow profile 5, in particular the profile and the inclination of the faces 50, 50 'and their optimal positioning with respect to the band to be wound 4 and the contact line 30 can be determined empirically or by calculation so as to obtain the desired effect, by studying the conditions of air circulation taking into account the speed of travel v of the band 4, and pressure losses in the section 5 and the evacuation circuit.
  • the diameter of the spool and, consequently, the position of the contact line 30 and the orientation of the strip 4 obviously vary, during the winding. It is therefore necessary to maintain permanently the position of the deflection member 5 inside the dihedron G and, for this, it is advantageous to use the device shown in detail on the figure 3 .
  • the rolled strip M passes over two baffle rollers, respectively, a roll 15 of flatness measurement, placed at the gap between the working rolls 1, 1 and an embossing roller 16 which is slidably mounted along guide rails provided on the columns 10 of the rolling mill and whose level can be adjusted by means of a jack 17 according to the thickness and the nature of the strip. laminated, the loading roller 16 being raised in a high position 16 'at the beginning of rolling to facilitate the passage of the head of the band M and its engagement on the mandrel 2 of the winder E.
  • a wrapper F mounted on a frame 22 which can rotate about an axis 23 between a raised position, shown on the figure 1 , for which the wrapper is engaged on the mandrel 2 to facilitate starting the winding and a lowered position, shown on the figure 3 , for which the wrapper is spaced from the mandrel 2 to allow the winding of the strip and the formation of the coil 3.
  • This increases in diameter as the winding and the contact line 30 of the band M with the coil 3 thus deviates from the winding axis 20 following a curve 34 shown in dashed line on the figure 3 .
  • the deflection member 5 must follow the increase in diameter of the coil while remaining in a optimal position inside the dihedron G to allow the evacuation of the entrained air in the boundary layer.
  • the deflection member 5 must follow a curve 34 'similar to the path 34 of the contact line 30 away, however, slightly from it to account for the fact that the dihedron G closes gradually as and when as the winding progresses.
  • the deflection member 5 To allow the progressive displacement of the deflection member 5, it is mounted at the end of a support 6 whose orientation and length may vary depending on the diameter of the coil 3.
  • the support 6 may consist of two spaced arms arranged at both ends of the section 5 constituting the deflection member and rotatable about a shaft 60 articulated at its ends on two sides of the frame 22 of the wrapper F .
  • Each arm 6 carries the body of a jack 61 whose rod 62 is provided, at its end, with a piece 63 for attaching the hollow section 5.
  • the latter is connected by a hose to a pipework attached to the arm support 6 for the evacuation of air sucked by the slots 55, 55 '.
  • the frame 22 of the wrapper F also carries a member 7 for controlling the rotation of the support 6, consisting of at least one lever hinged about an axis 70 and carrying a toothed sector 71 which meshes with a pinion toothed 64 integral in rotation with one of the two arms which constitute the support 6 and are secured in rotation.
  • the other leg of the lever 7 is articulated on the rod of a jack 72 bearing on the frame 22 and which thus controls the rotation of the support 6 between a retracted position 6a, and a spaced position 6b corresponding to the maximum diameter of the coil 3.
  • control member 7 After winding a number of turns sufficient to place the band M under the traction necessary for rolling, the control member 7 rotates the two arms of the support 6 to a position 6c for which the axis of the jack 61 is substantially tangent to the coil at the beginning of winding and the rod of the cylinder is advanced so as to place the deflection member in the desired position 5c near the inner face of the strip 4. The speed of rotation of the mandrel 2 is then increased to the level corresponding to the high speed rolling of the strip 4.
  • the cylinders 72 for controlling the rotation of the arm 6 and 61 for adjusting the radial position of the deflection member 5 are slaved to the variation in the diameter of the spool 3 so as to follow the curve 34 'remaining at the desired distance from the inner face 41 of the strip 4 and as close as possible to the nip 30.
  • the cylinders 61 and 72 are equipped with position sensors and controlled by a suitable circuit so as to adjust accurately the position of the profile 5 as a function of the diameter of the coil which is determined itself from the number of turns of the mandrel 2 taking into account the thickness of the strip 4.
  • the installation is equipped for this purpose with sensors and calculation means that can be programmed to determine the profile of the curve 34 'followed by the deflection member 5.
  • the spool 3 is removed and the rotary support 6 is folded into its position 6a inside the jig of the wrapper F. It can then be raised to engage the mandrel 2, to begin winding a new coil.
  • the invention which has just been described in the case of a reel winder can also be applied to a baffle roll, for example, the flatness measuring roller 15.
  • the band M is then applied under tension on an angular sector of the roll 15 and the deflection member 5 is placed, as previously, in the dihedron G between the band 4 in progress. winding and the part of the surface of the roller 15 placed upstream of the contact line 30.
  • the deflection member 5 Since the baffle roll 15 has a constant diameter, the deflection member 5 remains in the same position relative to the roll and can be placed, for example, at the end of a fixed support arm.
  • the deflection member 5 may be a hollow section opening into a pipe 53 for discharging, outwards, a part of the air entrained in the boundary layer 43 in order to reduce the dynamic pressure at the end of the flow. end of the dihedron G, at the level of the contact line 30. This avoids the formation of an air cushion which, on the one hand, could cause a lateral flutter of the band on the baffle roll and other in the case of a flatness roller, could disturb the measurement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)
  • Advancing Webs (AREA)
  • Winding Of Webs (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Braking Arrangements (AREA)

Claims (17)

  1. Verfahren zur Stabilisierung des Ablaufens eines bandförmigen Produktes mit hoher Geschwindigkeit in eine Längsrichtung, wobei das Band (4), von einer Kontaktlinie (30) ausgehend, auf mindestens einem Winkelsektor einer Umlauffläche (3) zur Auflage kommt, die um eine quer zu der Ablaufrichtung liegende Achse (20) rotiert und sich tangential an die rotierende Fläche (3) anschließt, indem, an der in der Ablaufrichtung stromaufwärts liegenden Seite, ein V-Winkel (G) ausgebildet wird, der einerseits durch eine Außenseite (31) der rotierenden Fläche (3) und andererseits durch eine Innenseite (41) des Bandes (4) begrenzt wird, entlang welcher ein Teil der Umgebungsluft eine Grenzschicht (43) ausbildet, die von dem Band (4) zu der Kontaktlinie (30) mitgerissen wird, Verfahren, bei welchem die Zirkulationsbedingungen der Luft in dem stromaufwärts liegenden V-Winkel (G) mittels eines hohlen Abweisungselementes (5) verändert werden, das eine erste Seite (50), die zu der Innenseite (41) des Bandes (4) gerichtet ist, und eine zweite Seite (50') aufweist, die zu der Außenseite (31) der rotierenden Fläche (3) gerichtet ist,
    dadurch gekennzeichnet, dass die erste Seite (50) des Abweisungselementes (5) zu der Innenseite (41) des Bandes (4), in dessen Ablaufrichtung, dergestalt geneigt wird, dass der Strömungsquerschnitt der von dem Band, entlang von dessen Innenseite (41), mitgerissenen Luft schrittweise vermindert wird, indem eine Erhöhung des Druckes der Luft, die in die somit ausgebildete Verengung (C1) hineingerissen wird, im Verhältnis zu dem Druck verursacht wird, der im Inneren des hohlen Abweisungselementes (5) herrscht, das, einerseits mit der Verengung (C1) über mindestens eine Öffnung (55), die in der geneigten Seite (50) vorgesehen ist, und andererseits mit außen kommuniziert, wobei der somit geschaffene Druckunterschied die Abführung einer gewissen Luftdurchflussmenge nach außen, die durch die Öffnung (55) hindurch geht, und das Zurückweichen des verbleibenden Anteils der Luftmasse bestimmt, welche die Grenzschicht (43) darstellt.
  2. Verfahren zur Stabilisierung eines Bandes nach Anspruch 1, dadurch gekennzeichnet, dass die zweite Seite (50') des Abweisungselementes (5) zu der rotierenden Fläche (3), in deren Rotationsrichtung, dergestalt geneigt wird, dass, durch eine Verengungswirkung, eine Druckerhöhung entlang der zweiten Seite (50') und die Abführung eines Teils der von der rotierenden Fläche (3) mitgerissenen Luft zu einem Bereich mit geringerem Druck herbeigeführt wird, indem sie durch mindestens eine Öffnung (55') hindurch geht, die in der zweiten Seite (50') vorgesehen ist.
  3. Vorrichtung zur Stabilisierung des Ablaufens mit hoher Geschwindigkeit in eine Längsrichtung eines Bandes (4), das, von einer Kontaktlinie (30) ausgehend, auf mindestens einem Winkelsektor einer Umlauffläche (3) zur Auflage kommt, die um eine quer zu der Ablaufrichtung liegende Achse (20) rotiert und sich tangential an die rotierende Fläche (3) anschließt, indem, an der in der Ablaufrichtung stromaufwärts liegenden Seite, ein V-Winkel (G) ausgebildet ist, der einerseits durch eine Außenseite (31) der rotierenden Fläche (3) und andererseits durch eine Innenseite (41) des Bandes (4) begrenzt wird, entlang welcher ein Teil der Umgebungsluft eine Grenzschicht (43) ausbildet, die von dem Band (4) zu der Kontaktlinie (30) mitgerissen wird, wobei ein Abweisungselement (5) in dem V-Winkel (G) dergestalt platziert wird, dass die Zirkulationsbedingungen der von dem Band (4) mitgerissenen Luft verändert werden, wobei das Abweisungselement (5) eine erste Seite (50), die zu der Innenseite (41) des Bandes (4) gerichtet ist, und eine zweite Seite (50') aufweist, die zu der Außenseite (31) der rotierenden Fläche (3) gerichtet ist,
    dadurch gekennzeichnet, dass mindestens die erste Seite (50) des Abweisungselementes (5) zu der Innenseite (41) des Bandes (4) in dessen Ablaufrichtung geneigt ist und mit mindestens einer Öffnung (55) versehen ist, die in einen Innenraum (51) mündet, der im Inneren des Abweisungselementes (5) vorgesehen ist und mit einem Außenbereich verbunden ist, wobei die geneigte Seite (50) mit der Innenseite (41) des Bandes (4) eine Verengung (C1) bildet, in welcher der Druck im Verhältnis zu dem Druck in dem Innenraum (51) ansteigt, wobei der Druckunterschied die Abführung, durch die Öffnung (55) und den Innenraum (51), einer gewissen Luftmenge und das Zurückweichen des verbleibenden Anteils der in die Grenzschicht (43) hineingerissenen Luftmasse bestimmt.
  4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass der Innenraum (51) des hohlen Abweisungselementes (5) mit einem Außenbereich (54) verbunden ist, der sich mit einem niedrigeren Druck als der Druck (P) in der Verengung (C1) in Höhe der Eingangsöffnung (55), außerhalb des stromaufwärts liegenden V-Winkels (G) befindet.
  5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass der Innenraum (51) des Abweisungselementes (5) mit einem Außenbereich verbunden ist, in dem atmosphärischer Druck herrscht.
  6. Vorrichtung nach einem der Ansprüche 3, 4, 5, dadurch gekennzeichnet, dass die zweite Seite (50') des Abweisungselementes (5), die zu der rotierenden Fläche (3) gerichtet ist, im Verhältnis zu dieser dergestalt geneigt ist, dass eine Verengung ausgebildet wird, welche eine Druckerhöhung der Luft bestimmt, die von der rotierenden Fläche (3) mitgerissen wird, wovon ein Teil zu dem Außenbereich (54) abgeführt wird, der mit dem Innenraum (51) verbunden ist, wobei sie durch mindestens eine Öffnung (55') hindurchgeht, die in der zweiten Seite (50') vorgesehen ist.
  7. Vorrichtung zur Stabilisierung nach einem der Ansprüche 3 bis 6, dadurch gekennzeichnet, dass die Umlauffläche, auf welcher das Band aufliegt, aus einer Führungswalze (D) mit zylindrischem Profil besteht, wodurch eine Richtungsänderung der Ablaufebene des Bandes (M) bestimmt wird.
  8. Vorrichtung zur Stabilisierung nach einem der Ansprüche 3 bis 6, dadurch gekennzeichnet, dass sie stromaufwärts einer Haspel (3) zum Aufrollen des Bandes in übereinander liegende Windungen angeordnet ist, um das Mitreißen von Luft zwischen den Windungen (31, 32) zu verhindern.
  9. Vorrichtung zur Stabilisierung nach Anspruch 8, dadurch gekennzeichnet, dass das Element (5) zur Abweisung der Luft aus einem Hohlprofil besteht, das an einem Trägermittel (6) befestigt ist, welches in Abhängigkeit von dem Durchmesser der Haspel (3) dergestalt einstellbar ist, dass das Abweisungselement (5) in einer optimalen Stellung im Verhältnis zu der Innenseite (41) des Bandes (4) je nach dessen Aufrollen auf die Haspel gehalten wird.
  10. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, dass das profilierte Element (5) zur Abweisung der Luft am Ende von mindestens einem Trägerarm (6) angebracht ist, der eine verstellbare Länge aufweist und drehbar um eine Achse (60), die parallel zu der Achse (20) der Haspel (3) liegt, angebracht ist, wobei der Arm (6) Einstellungsmitteln (7) seiner Ausrichtung (61) und seiner Länge in Abhängigkeit von dem Durchmesser der Haspel (3) zugeordnet ist, zur Positionierung des profilierten Elementes (5) im Inneren des stromaufwärts liegenden V-Winkels (G).
  11. Vorrichtung nach Anspruch 10, dadurch gekennzeichnet, dass der Trägerarm (6) drehbar um eine Achse, die parallel zu der Achse der Haspel liegt, angebracht ist und einen Hydraulikzylinder (61) trägt, der ein erstes Element, das an dem Arm (6) befestigt ist, und ein zweites Element (62) aufweist, das verschiebbar an dem ersten Element angebracht ist und das Abweisungselement (5) trägt, wobei die Stellung des zweiten Elementes (62) im Verhältnis zu dem ersten (61) in Abhängigkeit von dem Durchmesser der Haspel (3) eingestellt wird.
  12. Vorrichtung nach einem der Ansprüche 10 und 11, dadurch gekennzeichnet, dass das Einstellungsmittel der Ausrichtung des Trägerarms einen Hebel (7) umfasst, der drehbeweglich mit dem Trägerarm (6) verbunden ist und dessen Winkelstellung durch einen Hydraulikzylinder (72) eingestellt wird.
  13. Vorrichtung nach Anspruch 12, dadurch gekennzeichnet, dass der Hebel (7) drehbar um eine Achse (70), die parallel zu derjenigen (60) des Trägerarms (6) liegt, angebracht und fest mit einem Zahnsegment (71) mit kreisförmigem Profil verbunden ist, das um die Achse (70) des Hebels (7) der Kurbel zentriert ist und mit einem Zahnrad (64) kämmt, das drehfest mit dem Trägerarm (6) verbunden ist.
  14. Vorrichtung nach einem der Ansprüche 9 bis 13, dadurch gekennzeichnet, dass das einstellbare Mittel (6) zum Tragen des Abweisungselementes an einer Umgreifereinrichtung (F) angebracht ist, welche der Haspel (3) zugeordnet ist, um den Anfang von deren Aufrollvorgang zu erleichtern, wobei das Trägermittel (6) innerhalb der Begrenzungslinie der Umgreifereinrichtung (F) eingefahren ist, wenn sich diese in der Anfangsstellung des Aufrollens befindet, und nach dem Aufrollen einiger Windungen und dem Entfernen der Umgreifereinrichtung (F) dergestalt ausgefahren ist, dass das Abweisungselement (5) in der Nähe des Bandes (M) in dem stromaufwärts liegenden V-Winkel (G) platziert ist.
  15. Verwendung einer Vorrichtung zur Stabilisierung nach einem der Ansprüche 3 bis 7, in einer Walzanlage eines metallenen Bandes, wobei die Vorrichtung zur Stabilisierung (5) stromaufwärts von mindestens einer Führungswalze (D) angeordnet ist, die auf der Strecke des Bandes platziert ist, um die direkte Auflage des Bandes auf der Walze ohne die Zwischenlage einer Luftschicht sicherzustellen, welche in der Lage ist, die Führung des Bandes zu beeinträchtigen.
  16. Verwendung einer Vorrichtung zur Stabilisierung nach einem der Ansprüche 6 bis 15, in einer Walzanlage eines metallenen Bandes, die mindestens ein Walzgerüst (10) umfasst, welches einer Walze (15) zum Messen von Planheit zugeordnet ist, auf welcher das Band unter Zug aufliegt, wobei die Vorrichtung zur Stabilisierung (5) stromaufwärts der Planheitswalze (15) angeordnet ist, um das Mitreißen, zwischen dem Band (M) und der Walze (15), einer Luftschicht zu verhindern, welche in der Lage ist, das Messen der Planheit zu beeinträchtigen.
  17. Verwendung einer Vorrichtung zur Stabilisierung nach einem der Ansprüche 8 bis 14, in einer Walzanlage eines metallenen Bandes (M), die eine Aufrolleinrichtung (E) umfasst, welche am Ende der Strasse platziert ist, wobei die Vorrichtung zur Stabilisierung (5) in dem V-Winkel (G) stromaufwärts der Kontaktlinie (30) mit dem bereits aufgerollten Band (4) platziert ist, um das Mitreißen von Luft zwischen den Windungen (31, 32) zu verhindern und um die Führungsstabilität des Bandes (4) während des Aufrollens sicherzustellen.
EP02790556A 2001-11-12 2002-11-12 Verfahren und vorrichtung zur stabilisierung eines mit grosser geschwindigkeit laufenden bandförmigen produktes Expired - Lifetime EP1448322B1 (de)

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FR0114619 2001-11-12
FR0114619A FR2832084B1 (fr) 2001-11-12 2001-11-12 Procede et dispositif de stabilisation du defilement a grande vitesse d'un produit en bande
PCT/FR2002/003869 WO2003041885A1 (fr) 2001-11-12 2002-11-12 Procede et dispositif de stabilisation du defilement a grande vitesse d'un produit en bande

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DE60225588T2 (de) 2008-09-25
CN1296151C (zh) 2007-01-24
US7300018B2 (en) 2007-11-27
ES2300496T3 (es) 2008-06-16
CN1607982A (zh) 2005-04-20
FR2832084A1 (fr) 2003-05-16
DE60225588D1 (de) 2008-04-24
EP1448322A1 (de) 2004-08-25
WO2003041885A1 (fr) 2003-05-22
ATE388771T1 (de) 2008-03-15
FR2832084B1 (fr) 2004-05-14

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