EP0753360A1 - Apparatus for straightening - Google Patents
Apparatus for straightening Download PDFInfo
- Publication number
- EP0753360A1 EP0753360A1 EP96110958A EP96110958A EP0753360A1 EP 0753360 A1 EP0753360 A1 EP 0753360A1 EP 96110958 A EP96110958 A EP 96110958A EP 96110958 A EP96110958 A EP 96110958A EP 0753360 A1 EP0753360 A1 EP 0753360A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- straightening
- flange
- disks
- tools
- angle
- 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
Links
- 239000000463 material Substances 0.000 claims description 8
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 238000005452 bending Methods 0.000 description 4
- 230000007704 transition Effects 0.000 description 3
- 238000005098 hot rolling Methods 0.000 description 2
- 238000005482 strain hardening Methods 0.000 description 2
- 206010042674 Swelling Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
- B21D3/02—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers
- B21D3/05—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers arranged on axes rectangular to the path of the work
-
- 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
- B21B1/08—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 structural sections, i.e. work of special cross-section, e.g. angle steel
- B21B1/088—H- or I-sections
-
- 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
- B21B1/08—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 structural sections, i.e. work of special cross-section, e.g. angle steel
- B21B1/088—H- or I-sections
- B21B1/0886—H- or I-sections using variable-width 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
- B21B13/005—Cantilevered roll stands
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
- B21B27/028—Variable-width rolls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
- B21B27/03—Sleeved rolls
Definitions
- the invention relates to a device for straightening flange profiles, in particular double T or U beams with the aid of several straightening tools arranged above and below the straightening material.
- Devices of this type are used to eliminate deviations in the carrier contour resulting from hot rolling, in particular bends, twists and cross-sectional deviations, and to give the carrier the desired straightness. This is done in such a way that the carrier is alternately subjected to an alternating bend with a decreasing amplitude in the feed direction with the aid of straightening rollers or disks, alternately above and below the straightening material with a certain pitch or a certain distance between the straightening axes arranged in the same plane .
- the straightening disks or rollers capture the web of the double-T beam, the height of which is at a cost increased its thickness. In addition, the alternating bends of the web are inevitably transferred to the flanges of the beam.
- the upper straightening axes are equipped with straightening disks, the lower ones with cylindrical straightening rollers.
- the straightening disks or rollers are normally mounted on one side, the straightening axes inevitably lead to an inclination of the straightening axes with respect to the horizontal and accordingly when straightening double-T beams and U-profiles in the area of the straightening force drive-side web root to a greater bending amplitude than in the area of the opposite web root. In the area of the web root on the drive side, this leads to residual stress peaks that definitely reach the magnitude of the yield stress and increase with the profile height, ie the distance from flange to flange, to reduce quality.
- the invention is based on the object of creating a straightening device which protects both the web and - despite the directing force acting there - the flange or the legs of a U-profile and in this way creates straight flange profiles with high accuracy and dimensional accuracy.
- the straightening tools preferably straightening disks, of which are arranged above the straightening good and optionally also below the straightening good and at least partially an effective, i.e. have the surface force exerting the straightening force (pressing surface), which runs at an angle with respect to the straightening axis or the narrow side of the flange or leg.
- the relevant directional disks are at least partially frustoconical and transmit the straightening force with their conical outer surface to the flange or leg.
- Straightening tools according to the invention can also be arranged below the straightening good.
- Straightening with the straightening disks according to the invention avoids a relative movement between the web and flange as well as any strain hardening in the region of the web near the flange.
- the angle of inclination of the effective surface area is preferably of the order of the friction angle; it then results from the following equation: and ensures a minimization of flange edge upsetting.
- the small diameter of the face plate face is preferably on the side facing away from the flange or leg, even if - when straightening double-T beams or U profiles - two face plates lie opposite each other on a straightening shaft.
- the intersection of the surface lines of the drive disk remote from the drive and the intersection of the drive disk close to the drive should be close to the drive.
- the straightening disks In order to avoid bending of the flange horizontally, based on the straightening position, depending on the straightening force, the straightening disks preferably have flange-supporting surfaces which are located on the web side and / or the side of the flange facing the web. Accordingly, the straightening disks have a U-shaped or T-shaped axial cross section.
- straightening disks with a comb-like axial cross section are suitable.
- Such a straightening disk then consists, preferably in one piece, of individual disks between which there are the effective lateral surfaces which are inclined according to the invention with respect to the horizontal and whose lateral surfaces support the flange or web in the straightening position on one or both sides.
- the straightening disks can also be designed so that they additionally introduce a certain, but not too great, straightening force into the web, although the web advantageously remains free of straightening force.
- straightening tools according to the invention need to be provided with the effective outer surface according to the invention; in extreme cases, one straightening tool according to the invention or one pair of straightening tools according to the invention above and below the straightening good in mutual proximity is sufficient. Straightening tools according to the invention can also be arranged below the straightening good only in the outlet area.
- the jacket or sloping surfaces of the straightening disks according to the invention ensure a maximum degree of alignment accuracy; in particular, they prevent the formation of flange upsets and outward bulges in the area of the flange edges and maintain the favorable residual stress state of the undirected profile resulting from hot rolling of the profiles.
- the straightening device consists of a drive 1, not shown in its individual parts, to which a shaft 2 is connected, on which two straightening disks 3, 4 are arranged above a double T-beam 5.
- the straightening discs 3, 4 have - in the axial direction - a T-shaped cross-section and consist of a circular disk-shaped part 6, each of which engages on the inside of the two flanges but does not touch the web of the flange, which merges into a frustoconical extension 7.
- the truncated cone-shaped lugs 7 are directed outwards with their small diameter surfaces 8 and are non-positively connected to the flange edges via their outer surfaces.
- the lateral surface or line 9 extends at an angle ⁇ with respect to the horizontal or the spacer bushes 10.
- the spacer bushes 10 serve to adjust the spacing of the alignment discs to the profile height (flange spacing) of the beam to be straightened. Accordingly, the inclusion angle ⁇ results between the surface line 9 and the narrow side surface of the flanges.
- the height Z of the frustoconical lugs is dimensioned so that the narrow sides of the flanges are supported over their entire height.
- the straightening disks 11, 12 of FIGS. 3 and 4 are arranged and constructed in principle in the same way as in the case of FIGS. 1, 2; however, they support the flanges on the outside and have conical lugs 7, the large-diameter surfaces 13 of which face inwards or face each other. In this way, the same inclusion angle is obtained between the lateral surfaces or lines 9 and the horizontal or the narrow sides of the carrier flanges as in the case of the straightening disks 3, 4 in FIG. 1, 2.
- the straightening rollers 15, 16 according to FIGS. 5, 6 consist of several, preferably connected to one another in one piece flange-supporting individual disks 17, 18, 19, 20, between each of which there is a frustoconical transition 21, 22, 23. In this way, there are 16 to 20 grooves 24, 25, 26 between the disks for receiving the flanges of beams with different dimensions.
- the surface lines of the frusto-conical transitions 21, 22, 23 with the narrow sides of the flanges opposite them in turn result in the inclusion angle ⁇ according to the invention already discussed.
- the straightening device need not be fully equipped with the straightening disks or bushings according to the invention; rather, it is sufficient if these are arranged in the region of the greatest bending amplitudes, that is to say on the inlet side, which would also lead to the largest upsetting or dimensional deviations without the straightening tools according to the invention.
- all of the upper straightening tools can be designed as disks or multi-disk rollers, while during straightening with a large pitch (distance between two adjacent straightening axes) and correspondingly small straightening forces, cylindrical straightening bushes 28 can be arranged below the straightening material, which extend from flange to flange.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Straightening Metal Sheet-Like Bodies (AREA)
Abstract
Description
Die Erfindung bezieht sich auf eine Vorrichtung zum Richten von Flanschprofilen, insbesondere von Doppel-T- oder U-Trägern mit Hilfe mehrerer oberhalb und unterhalb des Richtguts angeordneter Richtwerkzeuge.The invention relates to a device for straightening flange profiles, in particular double T or U beams with the aid of several straightening tools arranged above and below the straightening material.
Derartige Vorrichtungen dienen dazu, vom Warmwalzen herrührende Abweichungen der Träger-Kontur, insbesondere Biegungen, Verwindungen und Querschnittsabweichungen zu beseitigen sowie dem Träger die gewünschte Geradheit zu verleihen. Dies geschieht in der Weise, daß der Träger mit Hilfe abwechselnd oberhalb und unterhalb des Richtguts mit einer bestimmten Teilung bzw. einem bestimmten Abstand der jeweils in derselben Ebene angeordneten Richtachsen mit Hilfe von Richtwalzen oder -scheiben einer Wechselbiegung mit in der Vorschubrichtung abnehmender Amplitude unterworfen wird.Devices of this type are used to eliminate deviations in the carrier contour resulting from hot rolling, in particular bends, twists and cross-sectional deviations, and to give the carrier the desired straightness. This is done in such a way that the carrier is alternately subjected to an alternating bend with a decreasing amplitude in the feed direction with the aid of straightening rollers or disks, alternately above and below the straightening material with a certain pitch or a certain distance between the straightening axes arranged in the same plane .
Dabei erfassen die Richtscheiben oder -walzen den Steg des Doppel-T-Trägers, dessen Höhe sich dabei auf Kosten seiner Dicke vergrößert. Darüber hinaus übertragen sich die Wechselbiegungen des Stegs zwangsläufig auf die Flansche des Trägers. Beim Richten eines U-Profils sind die oberen Richtachsen mit Richtscheiben, die unteren mit zylindrischen Richtrollen bestückt.The straightening disks or rollers capture the web of the double-T beam, the height of which is at a cost increased its thickness. In addition, the alternating bends of the web are inevitably transferred to the flanges of the beam. When straightening a U-profile, the upper straightening axes are equipped with straightening disks, the lower ones with cylindrical straightening rollers.
Dies ist aufgrund der unterschiedlichen Widerstandsmomente des Stegs und des Flanschs bzw. der Schenkel mit einer Reihe gravierender Nachteile verbunden. Infolge seines wesentlich geringeren Widerstandsmomentes vollführt der Steg unter dem Einfluß der Richtkraft Relativbewegungen zum Flansch oder Schenkel mit seinem wesentlich größeren Widerstandsmoment, aufgrund derer es im Bereich der Stegwurzel, d.h. am Übergang Steg/Flansch bzw. Schenkel zu einer plastischen Verformung kommt. Beim Richten von U-Profilen ergeben sich im Druckbereich der Richtscheiben am Steg Plastifizierungen; der Steg erfährt jedoch keine Relativbewegung gegenüber dem Flansch. Diese plastische Verformung führt nicht nur zu einer Vergrößerung der Profilhöhe, sondern auch zu einer unerwünschten lokalen Kaltverfestigung und damit zu einem unerwünschten Zähigkeitsverlust. Hinzu kommt eine aus der plastischen Verformung resultierende Änderung der Eigenspannungen des Profils insbesondere im Bereich der Stegwurzel; dies namentlich bei einer einseitigen Lagerung der Richtscheiben oder -walzen.Due to the different moments of resistance of the web and the flange or the legs, this is associated with a number of serious disadvantages. As a result of its significantly lower section modulus, the web makes relative movements to the flange or leg with its significantly larger section modulus under the influence of the straightening force, due to which it occurs in the area of the web root, i.e. There is a plastic deformation at the web / flange or leg transition. When straightening U-profiles, plasticization occurs in the pressure area of the straightening disks on the web; however, the web does not move relative to the flange. This plastic deformation not only leads to an increase in the profile height, but also to an undesirable local strain hardening and thus to an undesirable loss of toughness. In addition, there is a change in the internal stresses of the profile resulting from the plastic deformation, in particular in the area of the web root; this is particularly the case when the straightening disks or rollers are supported on one side.
Da die Richtscheiben oder -walzen normalerweise einseitig gelagert sind, kommt es unter dem Einfluß der Richtkraft zwangsläufig zu einer Neigung der Richtachsen gegenüber der Horizontalen und demgemäß beim Richten von Doppel-T-Trägern und U-Profilen im Bereich der antriebsseitigen Stegwurzel zu einer größeren Biegungsamplitude als im Bereich der gegenüberliegenden Stegwurzel. Das führt im Bereich der antriebsseitigen Stegwurzel zu Eigenspannungsspitzen, die durchaus die Größenordnung der Fließspannung erreichen und mit der Profilhöhe, d.h. dem Abstand von Flansch zu Flansch qualitätsmindernd zunehmen.Since the straightening disks or rollers are normally mounted on one side, the straightening axes inevitably lead to an inclination of the straightening axes with respect to the horizontal and accordingly when straightening double-T beams and U-profiles in the area of the straightening force drive-side web root to a greater bending amplitude than in the area of the opposite web root. In the area of the web root on the drive side, this leads to residual stress peaks that definitely reach the magnitude of the yield stress and increase with the profile height, ie the distance from flange to flange, to reduce quality.
Um diese Nachteile zu vermeiden, gibt es Richtscheiben, deren Richtkraft nicht am Steg, sondern am Flansch oder an den Schenkeln eines U-Profils und demgemäß im Bereich des größten Widerstandsmoments angreift. Das Einleiten der Richtkraft zusätzlich oder ausschließlich am Flansch verringert bzw. vermeidet zwar eine Relativbewegung zwischen Steg und Flansch sowie die damit verbundenen Nachteile, ohne daß die durch das Einleiten der Richtkraft in den Flansch bedingte Änderung des Eigenspannungszustandes im Flansch mit Nachteilen verbunden wäre. Jedoch kommt es infolge des Einleitens der Richtkraft in den Flansch dort zu Aufstauchungen der Flanschkanten sowie zu Ausbauchungen an der Außenseite des Flanschs und dadurch bedingt zu Maßabweichungen, die mit steigendem Verhältnis Flanschbreite/Flanschdicke zunehmen. Um diese Maßabweichungen in Grenzen zu halten, kommen auch Richtscheiben zur Verwendung, welche die Richtkraft sowohl in den Steg als auch in den Flansch einleiten. Die dabei naturgemäß geringere Richtkraft am Flansch führt zu einer Verringerung, jedoch nicht zu einer weitestgehenden Beseitigung der dort in Erscheinung tretenden Maßabweichungen.To avoid these disadvantages, there are straightening disks whose straightening force does not act on the web, but on the flange or on the legs of a U-profile and accordingly in the area of the greatest section modulus. The introduction of the straightening force additionally or exclusively on the flange reduces or avoids a relative movement between the web and the flange and the associated disadvantages, without the disadvantage that changes in the residual stress state in the flange caused by the introduction of the straightening force would be associated with disadvantages. However, as a result of the introduction of the straightening force into the flange, there are swellings on the flange edges and bulges on the outside of the flange and, as a result, dimensional deviations, which increase with an increasing ratio of flange width / flange thickness. In order to keep these dimensional deviations within limits, straightening disks are also used, which introduce the straightening force into both the web and the flange. The naturally lower straightening force on the flange leads to a reduction, but not to the greatest possible elimination of the dimensional deviations that appear there.
Der Erfindung liegt nun die Aufgabe zugrunde, eine Richtvorrichtung zu schaffen, die sowohl den Steg als auch - trotz dort angreifender Richtkraft - den Flansch oder die Schenkel eines U-Profils schont und auf diese Weise gerade Flanschprofile mit hoher Richt- und Maßgenauigkeit schafft.The invention is based on the object of creating a straightening device which protects both the web and - despite the directing force acting there - the flange or the legs of a U-profile and in this way creates straight flange profiles with high accuracy and dimensional accuracy.
Die Erfindung löst dieses Problem mit einer Richtvorrichtung, deren Richtwerkzeuge, vorzugsweise Richtscheiben, oberhalb des Richtguts und wahlweise auch unterhalb des Richtguts angeordnet sind und mindestens zum Teil eine wirksame, d.h. die Richtkraft ausübende Mantelfläche (Preßfläche) besitzen, die winklig in bezug auf die Richtachse bzw. die Schmalseite des Flansches oder Schenkels verläuft. Demgemäß sind die betreffenden Richtscheiben zumindest teilweise kegelstumpfförmig ausgebildet und übertragen die Richtkraft mit ihrer konischen Mantelfläche auf den Flansch oder Schenkel. Unterhalb des Richtgutes können ebenfalls erfindungsgemäße Richtwerkzeuge angeordnet sein.The invention solves this problem with a straightening device, the straightening tools, preferably straightening disks, of which are arranged above the straightening good and optionally also below the straightening good and at least partially an effective, i.e. have the surface force exerting the straightening force (pressing surface), which runs at an angle with respect to the straightening axis or the narrow side of the flange or leg. Accordingly, the relevant directional disks are at least partially frustoconical and transmit the straightening force with their conical outer surface to the flange or leg. Straightening tools according to the invention can also be arranged below the straightening good.
Das Richten mit den erfindungsgemäßen Richtscheiben vermeidet eine Relativbewegung zwischen Steg und Flansch sowie jede Kaltverfestigung im flanschnahen Bereich des Stegs.Straightening with the straightening disks according to the invention avoids a relative movement between the web and flange as well as any strain hardening in the region of the web near the flange.
Der Neigungswinkel der wirksamen Mantelfäche liegt vorzugsweise in der Größenordnung des Reibungswinkels; er ergibt sich dann aus der folgenden Gleichung:
Vorzugsweise liegt der kleine Durchmesser der Richtscheibenstirnfläche auf der vom Flansch oder Schenkel abgekehrten Seite, und zwar auch dann, wenn - beim Richten von Doppel-T-Trägern oder U-Profilen - jeweils zwei Richtscheiben auf einer Richtwelle einander gegenüberliegen. Dabei sollte der Schnittpunkt der Mantellinien der antriebsfernen Richtscheibe antriebsfern und der Schnittpunkt der antriebsnahen Richtscheibe antriebsnah liegen.The small diameter of the face plate face is preferably on the side facing away from the flange or leg, even if - when straightening double-T beams or U profiles - two face plates lie opposite each other on a straightening shaft. The intersection of the surface lines of the drive disk remote from the drive and the intersection of the drive disk close to the drive should be close to the drive.
Um je nach Richtkraft Ausbiegungen des Flanschs in der Horizontalen, bezogen auf die Richtposition, zu vermeiden, weisen die Richtscheiben vorzugsweise flanschstützende Flächen auf, die sich auf der Stegseite und/oder der stegabgewandten Seite des Flanschs befinden. Demgemäß besitzen die Richtscheiben einen U-förmigen oder T-förmigen axialen Querschnitt.In order to avoid bending of the flange horizontally, based on the straightening position, depending on the straightening force, the straightening disks preferably have flange-supporting surfaces which are located on the web side and / or the side of the flange facing the web. Accordingly, the straightening disks have a U-shaped or T-shaped axial cross section.
Um mit einem Richtrollenpaar gleichzeitig Flansch- oder Schenkelprofile unterschiedlicher Abmessung ohne Richtscheibenwechsel richten zu können, eignen sich Richtscheiben mit einem kammartigen axialen Querschnitt. Eine derartige Richtscheibe besteht dann, vorzugsweise einstückig, aus einzelnen Scheiben zwischen denen sich die erfindungsgemäß gegenüber der Horizontalen geneigten wirksamen Mantelfächen befinden und deren seitliche Flächen den Flansch oder Steg in der Richtposition ein- oder beidseitig abstützen.In order to be able to straighten flange or leg profiles of different dimensions with a pair of straightening rollers at the same time without changing the straightening disk, straightening disks with a comb-like axial cross section are suitable. Such a straightening disk then consists, preferably in one piece, of individual disks between which there are the effective lateral surfaces which are inclined according to the invention with respect to the horizontal and whose lateral surfaces support the flange or web in the straightening position on one or both sides.
Die Richtscheiben können auch so beschaffen sein, daß sie zusätzlich eine gewisse, jedoch nicht allzu große Richtkraft in den Steg einleiten, wenngleich der Steg vorteilhafterweise richtkraftfrei bleibt.The straightening disks can also be designed so that they additionally introduce a certain, but not too great, straightening force into the web, although the web advantageously remains free of straightening force.
Allerdings brauchen nicht sämtliche Richtwerkzeuge mit der erfindungsgemäßen wirksamen Mantelfläche versehen zu sein; im Extremfall genügt jeweils ein erfindungsgemäßes Richtwerkzeug bzw. ein erfindungsgemäßes Richtwerkzeugpaar oberhalb und unterhalb des Richtguts in gegenseitiger Nachbarschaft. Unterhalb des Richtgutes können auch nur im Auslaufbereich erfindungsgemäße Richtwerkzeuge angeordnet sein.However, not all straightening tools need to be provided with the effective outer surface according to the invention; in extreme cases, one straightening tool according to the invention or one pair of straightening tools according to the invention above and below the straightening good in mutual proximity is sufficient. Straightening tools according to the invention can also be arranged below the straightening good only in the outlet area.
Insgesamt gesehen gewährleisten die erfindungsgemäßen Mantel- bzw. Schrägflächen der Richtscheiben ein Höchstmaß an Richtgenauigkeit; sie vermeiden insbesondere das Entstehen von Flanschaufstauchungen und nach außen gerichteten Ausbauchungen im Bereich der Flanschkanten und bewahren den vom Warmwalzen der Profile herrührenden günstigen Eigenspannungszustand des ungerichteten Profils.Seen overall, the jacket or sloping surfaces of the straightening disks according to the invention ensure a maximum degree of alignment accuracy; in particular, they prevent the formation of flange upsets and outward bulges in the area of the flange edges and maintain the favorable residual stress state of the undirected profile resulting from hot rolling of the profiles.
Die Erfindung wird nachfolgend anhand von in der Zeichnung dargestellten Ausführungsbeispielen des näheren erläutert. In der Zeichnung zeigen:
- Fig. 1
- die schematische Darstellung einer Richtvorrichtung mit einem oberen Richtscheibenpaar teilweise in einem axialen Längsschnitt,
- Fig. 2
- eine vergrößerte Darstellung eines Teils der beiden Richtscheiben,
- Fig. 3
- eine Richtvorrichtung mit außenseitiger Flanschführung,
- Fig. 4
- die vergrößerte Darstellung eines Teils der beiden Richtscheiben,
- Fig. 5
- einen axialen Längsschnitt durch eine Richtrolle zum flanschstützenden Richten bei unterschiedlichen Trägerabmessungen,
- Fig. 6
- einen Teil der Richtrolle nach Fig. 5,
- Fig. 7
- eine Richtbuchse mit zylindrischem Mittelteil in einem axialen Längsschnitt,
- Fig. 8
- einen Teil der Richtbuchse nach Fig. 7 in vergrößerter Darstellung und
- Fig. 9
- eine zylindrische Richtbuchse.
- Fig. 1
- 1 shows a schematic illustration of a straightening device with an upper pair of straightening disks, partly in an axial longitudinal section,
- Fig. 2
- an enlarged view of part of the two straightening disks,
- Fig. 3
- a straightening device with an external flange guide,
- Fig. 4
- the enlarged view of part of the two straightening disks,
- Fig. 5
- an axial longitudinal section through a straightening roller for flange-supporting straightening with different beam dimensions,
- Fig. 6
- part of the straightening roll according to FIG. 5,
- Fig. 7
- a directional bushing with a cylindrical middle part in an axial longitudinal section,
- Fig. 8
- part of the directional bushing according to FIG. 7 in an enlarged view and
- Fig. 9
- a cylindrical directional bush.
Die Richtvorrichtung besteht aus einem in seinen Einzelteilen nicht näher dargestellten Antrieb 1 mit dem eine Welle 2 verbunden ist, auf der zwei Richtscheiben 3,4 oberhalb eines Doppel-T-Trägers 5 angeordnet sind. Die Richtscheiben 3,4 besitzen - in axialer Richtung - einen T-förmigen Querschnitt und bestehen aus einem jeweils an der Innenseite der beiden Flansche angreifenden, den Steg des Flansches jedoch nicht berührenden kreisscheibenförmigen Teil 6, der in einen kegelstumpfförmigen Ansatz 7 übergeht. Die kegelstumpfförmigen Ansätze 7 sind mit ihren Kleindurchmesserflächen 8 jeweils nach außen gerichtet und stehen über ihre Mantelflächen in kraftschlüssiger Verbindung mit den Flanschkanten. Dabei verläuft die Mantelfläche bzw. -linie 9 unter einem Winkel ρ in bezug auf die Horizontale bzw. die Distanzbuchsen 10. Die Distanzbuchsen 10 dienen zum Einstellen des Abstandes der Richtscheiben auf die Profilhöhe (Flanschabstand) des zu richtenden Trägers. Dementsprechend ergibt sich zwischen der Mantellinie 9 und der Schmalseitenfläche der Flansche der Einschlußwinkel ρ. Die Höhe Z der kegelstumpfförmigen Ansätze ist so bemessen, daß die Schmalseiten der Flansche über ihre ganze Höhe abgestützt sind.The straightening device consists of a
Die Richtscheiben 11,12 der Fig. 3 und 4 sind in prinzipiell gleicher Weise wie im Falle der Fig. 1,2 angeordnet und aufgebaut; sie stützen die Flansche jedoch außenseitig ab und besitzen konische Ansätze 7, deren Großdurchmesserflächen 13 nach innen weisen bzw. einander zugekehrt sind. Auf diese Weise ergibt sich zwischen den Mantelflächen bzw. -linien 9 und der Horizontalen bzw. den Schmalseiten der Trägerflansche jeweils der gleiche Einschlußwinkel wie bei den Richtscheiben 3,4 der Fig. 1,2.The straightening
Die Richtrollen 15,16 nach den Fig. 5,6 bestehen aus mehreren, vorzugsweise einstückig miteinander verbundenen flanschstützenden Einzelscheiben 17,18,19,20, zwischen denen sich jeweils ein kegelstumpfförmiger Übergang 21,22,23 befindet. Auf diese Weise ergeben sich zwischen den Scheiben 16 bis 20 Rillen 24,25,26 zur Aufnahme der Flansche von Trägern mit unterschiedlichen Abmessungen. Die Mantellinien der kegelstumpfförmigen Übergänge 21,22,23 ergeben mit den ihnen gegenüberliegenden Schmalseiten der Flansche wiederum den bereits erörterten erfindungsgemäßen Einschlußwinkel ρ.The straightening
Die Richtvorrichtung braucht nicht zur Gänze mit den erfindungsgemäßen Richtscheiben oder -buchsen ausgestattet zu sein; vielmehr reicht es aus, wenn diese im Bereich der größten Biegungsamplituden, also einlaufseitig angeordnet sind, die ohne die erfindungsgemäßen Richtwerkzeuge auch zu den größten Aufstauchungen bzw. Maßabweichungen führen würden. Andererseits können aber auch sämtliche oberen Richtwerkzeuge als Scheiben oder Mehrscheibenrollen ausgebildet sein, während beim Richten mit großer Teilung (Abstand zweier benachbarter Richtachsen) und dementsprechend kleinen Richtkräften unterhalb des Richtgutes zylindrische Richtbuchsen 28 angeordnet sein können, die von Flansch zu Flansch reichen.The straightening device need not be fully equipped with the straightening disks or bushings according to the invention; rather, it is sufficient if these are arranged in the region of the greatest bending amplitudes, that is to say on the inlet side, which would also lead to the largest upsetting or dimensional deviations without the straightening tools according to the invention. On the other hand, however, all of the upper straightening tools can be designed as disks or multi-disk rollers, while during straightening with a large pitch (distance between two adjacent straightening axes) and correspondingly small straightening forces, cylindrical straightening
Hingegen lassen sich bei ausschließlich auslaufseitiger Anordnung der erfindungsgemäßen Richtscheiben, insbesondere bei einlaufseitiger großer Biegungsamplitude kaum maßgenaue und spannungsarme Profile erzeugen.On the other hand, if the straightening disks according to the invention are arranged exclusively on the outlet side, in particular with a large bending amplitude on the inlet side, it is hardly possible to produce dimensionally accurate and low-stress profiles.
Im Hinblick auf möglichst geringe Richtkräfte bei hoher Richtgenauigkeit ist es vorteilhaft, die Richtscheiben mit großer Teilung, d.h. mit möglichst großem Abstand in Richtung der Richtgutbewegung anzuordnen und gegebenenfalls auch mit einer Richtscheibenanstellung (Scheibenabstand von einer gedachten Nullinie) zu arbeiten, die kleiner ist als beim Richten mit herkömmlichen Richtvorrichtungen und demgemäß auch eine kleinere Amplitude ergibt.In view of the lowest possible straightening forces with high straightening accuracy, it is advantageous to align the straightening disks with a large pitch, i.e. To be arranged with as large a distance as possible in the direction of the leveling material movement and, if necessary, also to work with a leveling disc adjustment (disc distance from an imaginary zero line) which is smaller than when leveling with conventional leveling devices and accordingly also results in a smaller amplitude.
Claims (15)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19525513A DE19525513B4 (en) | 1995-07-13 | 1995-07-13 | Device for straightening a flange profile as straightening material |
| DE19525513 | 1995-07-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0753360A1 true EP0753360A1 (en) | 1997-01-15 |
| EP0753360B1 EP0753360B1 (en) | 2002-10-09 |
Family
ID=7766718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96110958A Expired - Lifetime EP0753360B1 (en) | 1995-07-13 | 1996-07-06 | Apparatus for straightening |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0753360B1 (en) |
| DE (2) | DE19525513B4 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1044735A3 (en) * | 1999-04-03 | 2003-01-15 | Sms Schloemann-Siemag Aktiengesellschaft | Method and arrangement for the continuous manufacture of finished sections made of metal |
| WO2005000495A1 (en) * | 2003-06-30 | 2005-01-06 | Betriebsforschungsinstitut VDEh-Institut für angewandte Forschung GmbH | Method for leveling hot profiles |
| CN101585061B (en) * | 2009-04-10 | 2011-04-27 | 无锡华联精工机械有限公司 | T profile straightening machine |
| CN102248031A (en) * | 2011-07-06 | 2011-11-23 | 无锡洲翔成套焊接设备有限公司 | Compression roller device of hydraulic straightening machine |
| CN110711794A (en) * | 2019-11-25 | 2020-01-21 | 湖南恒岳重钢钢结构工程有限公司 | Flange outward-turning correction device for wind power tower cylinder |
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| US3566656A (en) * | 1967-10-16 | 1971-03-02 | Kawasaki Steel Co | Device for shaping edges of shape steel |
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| EP0472765A1 (en) * | 1990-08-28 | 1992-03-04 | Kawasaki Steel Corporation | Section steel straightener with adjustable roller width |
| JPH04288930A (en) * | 1991-03-19 | 1992-10-14 | Kawasaki Steel Corp | Device for straightening h-shape steel |
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| DE3309572A1 (en) * | 1983-03-17 | 1984-09-20 | Maschinenfabrik Christian Häusler AG, Duggingen | Straightening and calibrating machine |
| DE3522976C2 (en) * | 1985-06-27 | 1994-08-04 | Schloemann Siemag Ag | Process for straightening rolled stock |
| DE4330649C2 (en) * | 1993-09-10 | 2002-04-11 | Sms Demag Ag | Profile roll straightening machine with overhung straightening rolls |
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1995
- 1995-07-13 DE DE19525513A patent/DE19525513B4/en not_active Expired - Fee Related
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1996
- 1996-07-06 DE DE59609769T patent/DE59609769D1/en not_active Expired - Lifetime
- 1996-07-06 EP EP96110958A patent/EP0753360B1/en not_active Expired - Lifetime
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| JPS56136202A (en) * | 1980-03-28 | 1981-10-24 | Topy Ind Ltd | Method and apparatus for manufacturing h-beam |
| JPS6082201A (en) * | 1983-10-11 | 1985-05-10 | Kawasaki Steel Corp | Hot rolling method of h-beam |
| DE4003258A1 (en) * | 1990-02-03 | 1991-08-08 | Betr Forsch Inst Angew Forsch | Straightening profiled girder - which are detected with centre web engagement by inner disc between two outer ones |
| EP0472765A1 (en) * | 1990-08-28 | 1992-03-04 | Kawasaki Steel Corporation | Section steel straightener with adjustable roller width |
| JPH04288930A (en) * | 1991-03-19 | 1992-10-14 | Kawasaki Steel Corp | Device for straightening h-shape steel |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1044735A3 (en) * | 1999-04-03 | 2003-01-15 | Sms Schloemann-Siemag Aktiengesellschaft | Method and arrangement for the continuous manufacture of finished sections made of metal |
| WO2005000495A1 (en) * | 2003-06-30 | 2005-01-06 | Betriebsforschungsinstitut VDEh-Institut für angewandte Forschung GmbH | Method for leveling hot profiles |
| CN100364682C (en) * | 2003-06-30 | 2008-01-30 | Bfivdeh-应用研究院有限公司 | Method for straightening hot profile |
| JP2009513352A (en) * | 2003-06-30 | 2009-04-02 | ベトリープスフォルシュングスインスティトゥート ファウデーエーハー−インスティトゥート フュア アンゲヴァンテ フォルシュング ゲゼルシャフト ミット ベシュレンクテル ハフツング | How to correct hot shapes |
| RU2366526C2 (en) * | 2003-06-30 | 2009-09-10 | Бетрибсфоршунгсинститут Фдех-Институт Фюр Ангевандте Форшунг Гмбх | Method of flattening hot structural shapes |
| CN101585061B (en) * | 2009-04-10 | 2011-04-27 | 无锡华联精工机械有限公司 | T profile straightening machine |
| CN102248031A (en) * | 2011-07-06 | 2011-11-23 | 无锡洲翔成套焊接设备有限公司 | Compression roller device of hydraulic straightening machine |
| CN110711794A (en) * | 2019-11-25 | 2020-01-21 | 湖南恒岳重钢钢结构工程有限公司 | Flange outward-turning correction device for wind power tower cylinder |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19525513B4 (en) | 2006-01-19 |
| EP0753360B1 (en) | 2002-10-09 |
| DE59609769D1 (en) | 2002-11-14 |
| DE19525513A1 (en) | 1997-01-16 |
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