EP0065533B1 - Procede pour laminer un profile en acier en forme d'u ou analogue et train de poutrelles universel pour la mise en oeuvre du procede - Google Patents

Procede pour laminer un profile en acier en forme d'u ou analogue et train de poutrelles universel pour la mise en oeuvre du procede Download PDF

Info

Publication number
EP0065533B1
EP0065533B1 EP81903112A EP81903112A EP0065533B1 EP 0065533 B1 EP0065533 B1 EP 0065533B1 EP 81903112 A EP81903112 A EP 81903112A EP 81903112 A EP81903112 A EP 81903112A EP 0065533 B1 EP0065533 B1 EP 0065533B1
Authority
EP
European Patent Office
Prior art keywords
universal
profile
web
stand
bevels
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
Application number
EP81903112A
Other languages
German (de)
English (en)
Other versions
EP0065533A1 (fr
Inventor
Heinz W. Schepek
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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 Mannesmann AG filed Critical Mannesmann AG
Priority to AT81903112T priority Critical patent/ATE12593T1/de
Publication of EP0065533A1 publication Critical patent/EP0065533A1/fr
Application granted granted Critical
Publication of EP0065533B1 publication Critical patent/EP0065533B1/fr
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
    • 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
    • B21B1/095—U-or channel sections

Definitions

  • the invention relates to a method for rolling U-steel or the like. From a U-shaped pre-profile in a universal carrier line, which comprises at least one compression frame, in which a pre-profile is assumed that is only on the outside of the web in the central area straight and in the adjoining transition areas of the flanges has slants, which form an obtuse angle with the straight line of the middle area, and in which the overfills or bulges arising in universal stitches at the free end areas of the flange edges and the respectively opposite transition areas between the web and flanges in at least one compression stitch with the web of the rolled profile stretched.
  • the invention is based on the same object, namely the provision of a method for suppressing bending of the rolling stock and for suppressing an imbalance in the power distribution between the top roller and the bottom roller of the compression stand when rolling U-steel using a universal roller train, but the solution is one other.
  • the solution according to the invention provides that the middle straight area of the outside of the web from which the bevels originate is dimensioned equal to or a few millimeters smaller than the web width of the finished profile when the preliminary profile is rolled, that the obtuse angle a of the inclines of the preliminary profile is not less than 130 ° that the contour of the outside of the web in the upsetting stitches is maintained by shortening the bevels in previous universal stitches until the bevels are used up in a universal stretching stitch and the bulges fill a U-shaped intermediate profile that is angular in the transition areas and that the intermediate profile is as known t is finish-rolled in a universal stand, possibly after previous universal stretching passes in closed calibers and upsetting passes.
  • the invention initially differs in terms of the design rules for the production of the preliminary profile from the models according to FIGS. 5 and 6 of DE-A 2 420 408, because here the middle straight area of the outside of the web is significantly smaller than the web widths of the finished profiles shown. as well as the obtuse angle that the bevels form with the middle straight region is over 130 °. These two design rules are decisive for the solution of the task within the scope of the further process features.
  • the adjustment of the middle straight web area of the preliminary profile ensures that when the bevels in the universal stretching stitches are shortened, a web width that ultimately corresponds to the finished profile is set in an intermediate profile, so that rolling can then continue with closed calibers.
  • the requirement that the inclination of the bevels should not be greater than the obtuse angle between the bevels and the straight central area and to maintain this contour in the upset stitches means that the universal stretch stitches do not involve too much material at the expense of stretching in the spreading or the bulges in the area of the bevels goes with which these bulges never go beyond the edge areas of the horizontal roller of the universal stand or the universal stands assigned to the web outside (in the case of continuous operation) when the universal calibers are still open.
  • the method according to the invention therefore leads to the fact that the restoration of the not too steep inclines in the transition area between the web and the flanges exerts a supporting force counteracting the flow of the material from the flanges in the upsetting stitches, so that in the upsetting stitches a substantial stretching of the profile without essential Spreading takes place.
  • each universal stitch in turn, with strong decreases in the web as well as in the flanges, the formation of bulges in the area of the bevels can be tolerated, because these are ironed out again in a subsequent upsetting stitch.
  • the bevels are used up in a universal stretch stitch, i.e.
  • the bulges created during this pass fill an angular U-shaped intermediate profile in the transition areas can be transferred to the ideal universal rolling in closed calibres for further acceptances, provided that it is not possible to finish-roll immediately after the intermediate profile.
  • overfills are avoided from the outset by starting with closed calibres in the universal frame. Then the bale length of the horizontal roller of the universal stand, which processes the outside of the U-profile, must correspond to the width of the preliminary profile, or vice versa (column 5, lines 15 ff), and the flange thickness of the preliminary profile must not be too great should, if possible, correspond to the finished thickness (column 5, line 54 ff).
  • a universal stand with an open caliber and an additional stand with two profiled horizontal rolls are used for the rolling out of the preliminary profile in reversing operation, in order to roll U-shaped intermediate profiles while shortening the bevels and while maintaining the contour of the outside of the web.
  • This contour includes cusps in the transition between the straight middle bar area and the bevels, which are still present when the caliber is closed on a universal scaffold.
  • This process therefore requires two further duo roll stands with closed calibres to produce the finished profile and is therefore not comparable with the process according to the invention, which only requires one universal stand and one compression stand until the last intermediate profile for reversing operation.
  • the method according to the invention can of course be implemented in continuous operation with the corresponding outlay of universal and upsetting stands, the rollers of all stands being fixed.
  • the last universal frameworks must then be set up to form closed calibres, i.e. the vertical rollers must be able to enter between horizontal rollers.
  • a universal carrier line for performing the process in reversing operation only comprises a universal stand with adjustable rollers and only an upsetting stand with adjustable profiled horizontal rollers in tandem arrangement, as well as a universal finishing stand at a distance that enables the rolled stock to run freely after the last upsetting stitch.
  • the horizontal roller of the compression frame preferably the lower roller, assigned to the outside of the preliminary profile has a profile which is congruent with the contour of the outside, including the bevels, which may be indicated by US Pat. No. 1,856,269.
  • the horizontal roll of the universal stand preferably also the lower roll, assigned to the web outside should be fixed and determine the height of the rolling line, and ultimately the roll bales of the vertical rolls of this universal stand should be able to overlap the bale length of the fixed horizontal roll, which is the result of US-A 3 539 732.
  • FIG. 1 An example of a reversible universal carrier line is shown in FIG. 1.
  • the roughing stand 1 is followed at some distance by a stand combination consisting of a universal stand 2 and an upsetting stand 3 in a tandem arrangement.
  • This scaffolding combination is followed by a universal finishing scaffold 4 at a distance from the free outlet of the last intermediate profile.
  • the preliminary profile emerging from the roughing stand 1 is shaped (FIG. 2) in such a way that it deviates in the transition region below the flanges 6 on the underside 7a of the web 7 from the surface which is still straight in the central region M of the web 7 and is formed with bevels 8 .
  • 2 can also be used the other way round if it is intended to roll with flanges directed downwards.
  • the method can also be carried out if, instead of the bevels 8, the preliminary profile has radii in the transition regions, the radii being booked out with the first universal stitch in order to be subsequently pressed by the lower upsetting roller 15 provided with bevels 17 (FIG. 4) to be returned to a profile with slants.
  • Fig. 3 shows how the preliminary profile 5 is processed by the rollers of the universal stand 2.
  • the preliminary profile 5 lies with its central web area M on the fixed lower roller 11.
  • the upper adjustable horizontal roller 12 engages between the flanges 6 of the preliminary section, so that the web 7 between the upper and lower rollers 12, 11 is completely fixed.
  • the adjustable vertical rollers 13 are directed from the outer sides against the flanges 6 of the preliminary section 5.
  • the vertical rolls are designed such that their diameter is changed approximately at the level of the rolling line W and there has a shoulder 14.
  • the vertical rolls 13 can overlap the roll bale of the lower roll 11 in the course of the further work stages if the thickness of the flanges 6 is progressively reduced, e.g. except for dimension B of an intermediate profile in FIG. 6.
  • the preliminary profile 5 arrives in the compression frame 3, where the flange edges are processed by means of the compression rollers.
  • 4 shows the guidance of the preliminary profile 5 between the upsetting rollers 15, 16 of the upsetting frame (not shown in more detail).
  • the upper roller 16 can be adjusted, while the lower roller 15 is again arranged to be stationary.
  • the lower upsetting roller 15 has the same contour as that of the underside of the web 7 of the preliminary profile according to FIG. 2, i.e. above all that the upsetting roller 15 is also equipped with bevels 17 which are congruent with the bevels 8 of the preliminary profile.
  • a bulge 8a (FIG.
  • the adjustable upsetting roller 16 dips with a collar 16a between the flanges 6 of the preliminary profile 5, and other part of the upsetting roller 16 presses on the edges of the flanges 6.
  • the preliminary profile 5 is e.g. after the first universal stitch reversed upset by two stitches. Then the U-profile comes back into the universal stand 2, where a further reduction in the pre-profile is achieved with two further universal passes, because with each pass the rollers are readjusted according to the acceptance of the rolling stock.
  • 5 illustrates the reduction in the profile 5 which has already been achieved after the third universal stitch.
  • the vertical rollers 13 begin at this stage to overlap the fixed lower roller 11 due to the shoulders 14.
  • the slopes 8 of the preliminary profile are almost completely used up, i.e. the bulges 8a of these stitches fill the intermediate profile according to FIG. 5 in the edge area.
  • the last upsetting stitch (FIG. 7) essentially causes the flange edges to be machined again and any burrs to be removed from the web edges of the U-steel which are rolled away from the bevels 17 of the lower upsetting roller 15. This is particularly the case when the middle straight region M of the preliminary profile according to FIG. 2 and, accordingly, the congruent contour of the lower upsetting roller 15 is chosen to be a few millimeters smaller than the web width of the finished profile according to FIG. 8.
  • the U-steel then becomes punctured into the universal finishing stand 4 and, as shown in FIG. 8 for a parallel-flanged U-steel, receives its finished profile 5 '.

Claims (2)

1. Procédé pour laminer un profilé en acier en forme d'U ou analogue, à partir d'une ébauche de laminage (5) en forme d'U dans un train de poutrelles universel qui comprend au moins une cage refouleuse (3), dans lequel on part d'un profilé qui, du côté extérieur (7a) de l'âme (7), n'est rectiligne que dans la zone médiane (M) et comporte, dans les zones voisines de transition avec les ailes (6), des parties obliques (8), qui forment, avec la partie rectiligne de la zone médiane, un angle obtus (a), et dans lequel les pincements et les courbures (8a) qui se produisent, pendant les passes dans le train universel, dans les zones d'extrémité libres des bords des ailes et dans les zones de transition opposées situées entre l'âme (7) et les ailes (6), sont laminés en même temps dans au moins une passe refouleuse avec étirage de l'âme du profilé laminé, caractérisé en ce que la zone rectiligne moyenne (M), du côté extérieur de l'âme (7) de l'ébauche de laminage (5), d'où partent les parties obliques (8), est égale ou inférieure de quelques millimètres à la largeur de l'âme du profilé définitif (figure 8), l'angle obtus (a) des parties obliques de l'ébauche de laminage n'est pas inférieur à 130°, le contour du côté extérieur de l'âme dans les passes refouleuse (figure 4) est conservé, avec raccourcissement des parties obliques (8) dans les premières passes dans le train universel, jusqu'à ce que, dans une passe dans le train universel, les parties obliques soient éliminées et que les courbures (8a) remplissent un profilé intermédiaire en forme d'U, dont les zones de transition sont à arêtes vives (figure 5), et en ce que le profilé intermédiaire est, d'une manière connue, soumis à un laminage final dans une cage universelle (4), le cas échéant après des passes d'étirage dans le train universel dans des cannelures fermées (figure 6) et après des passes refouleuses (figure 7).
2. Train de poutrelles universel pour l'application du procédé selon la revendication 1 en manche dans les deux sens, qui, comprend une cage universelle (2) comportant des cylindres réglables et une cage refouleuse (3) comportant des cylindres cannelés (15, 16) réglables et une cage finisseuse universelle (4), caractérisé en ce que le cylindre horizontal (15) de la cage refouleuse (3) qui correspond au côté extérieur (7a) de l'âme (7) de l'ébauche de laminage (5), de préférence le cylindre inférieur, a un profilé qui recouvre le contour du côté extérieur, y compris les parties obliques (8), en ce que le cylindre horizontal (11) de la cage universelle (2), marchant dans les deux sens, qui correspond au côté extérieur de l'âme de l'ébauche de laminage, de préférence le cylindre inférieur, est fixe et détermine la hauteur de la ligne de laminage (W) et en ce que les tables des cylindres verticaux (13) de cette cage universelle peuvent dépasser la longueur de table du cylindre horizontal fixe (11).
EP81903112A 1980-10-25 1981-10-26 Procede pour laminer un profile en acier en forme d'u ou analogue et train de poutrelles universel pour la mise en oeuvre du procede Expired EP0065533B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81903112T ATE12593T1 (de) 1980-10-25 1981-10-26 Verfahren zum walzen von u-stahl oder dergl. und universal-traegerstrasse zur durchfuehrung des verfahrens.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803040325 DE3040325A1 (de) 1980-10-25 1980-10-25 Verfahren zum walzen von u-stahl o.dgl. und universal-traegerstrasse zur durchfuehrung des verfahrens
DE3040325 1980-10-25

Publications (2)

Publication Number Publication Date
EP0065533A1 EP0065533A1 (fr) 1982-12-01
EP0065533B1 true EP0065533B1 (fr) 1985-04-10

Family

ID=6115193

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81903112A Expired EP0065533B1 (fr) 1980-10-25 1981-10-26 Procede pour laminer un profile en acier en forme d'u ou analogue et train de poutrelles universel pour la mise en oeuvre du procede

Country Status (5)

Country Link
EP (1) EP0065533B1 (fr)
JP (1) JPS57501994A (fr)
DE (1) DE3040325A1 (fr)
NO (1) NO153642C (fr)
WO (1) WO1982001484A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5272899A (en) * 1992-09-17 1993-12-28 Mcdonald Steel Corp. Method and apparatus for hot roll forming inside U-shaped channel section
JP5929542B2 (ja) * 2012-06-20 2016-06-08 Ｊｆｅスチール株式会社 溝形鋼の圧延方法及び圧延設備

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2420408A1 (de) * 1973-08-25 1975-03-13 Nippon Steel Corp Verfahren zum walzen von u-stahl in einer universalwalzenstrasse

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1856269A (en) * 1930-09-25 1932-05-03 Bethlehem Steel Corp Method and means for rolling channel sections
US3538732A (en) * 1966-06-21 1970-11-10 Nippon Steel Corp Method and apparatus for producing channel steels

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2420408A1 (de) * 1973-08-25 1975-03-13 Nippon Steel Corp Verfahren zum walzen von u-stahl in einer universalwalzenstrasse

Also Published As

Publication number Publication date
WO1982001484A1 (fr) 1982-05-13
DE3040325A1 (de) 1982-06-03
JPS57501994A (fr) 1982-11-11
NO153642B (no) 1986-01-20
NO153642C (no) 1986-04-30
EP0065533A1 (fr) 1982-12-01
NO822094L (no) 1982-06-22

Similar Documents

Publication Publication Date Title
DE2714485C2 (de) Verfahren zum Warmwalzen von Doppel-T-Trägern aus rechteckigem Flachmaterial
DE2950473C2 (fr)
DE112005002080T5 (de) Verfahren zum Design von Walzenprofil und Walze zur Unterdrückung nichtquadratischer Wellen
DE19543414B4 (de) Verfahren zum Warmwalzen von Spundwandbohlen mit Z-förmigem Querschnitt
EP0265757B1 (fr) Procédé et arrangement pour laminer des profilés de coulée continue
DE1960601C3 (de) Universalwalzenstraße zum Walzen von Schienen
DE2437545C3 (de) Verfahren zum Walzen von Metallstäben
DE3805364A1 (de) Fertigwalzverfahren fuer profile
DE1427880A1 (de) Verfahren zur Herstellung von H-Traegern mit Vorspruengen auf der Aussenflaeche mindestens eines Flansches
DE1912350A1 (de) Verfahren zum Walzen von Stahl-Flanschwerkstuecken sowie Walzengeruest zur Durchfuehrung dieses Verfahrens
EP0065533B1 (fr) Procede pour laminer un profile en acier en forme d'u ou analogue et train de poutrelles universel pour la mise en oeuvre du procede
EP0734792B1 (fr) Groupe de cages de laminoirs universels et procédé pour le laminage d'ébauches de profilés coulées en continu
DE538635C (de) Verfahren zur Herstellung durchbrochener Metallgegenstaende
DE3102631A1 (de) "h-spundbohle aus stahl und verfahren zu deren herstellung"
DE2529405A1 (de) Verfahren zum profilwalzen
EP0535767A1 (fr) Train de laminage pour laminer de poutrelles
DE102011121512A1 (de) Winkelwalzen
EP1660249A1 (fr) Profile de mur de palplanches en acier, en double t
DE3619295A1 (de) Verfahren und vorrichtung zum walzen von rohlingen fuer profileisentraeger aus stranggegossenen brammen
EP0757599B1 (fr) Procede et dispositif pour laminer des poutrelles a partir d'ebauches de profiles
EP1112783A2 (fr) Procédé de laminage d'un profilé, en particulier d'un profilé à ailes, et cage de laminoir universel correspondante
DE2659318A1 (de) Verfahren zum walzen von rundstahl
DE2844438A1 (de) Walzstrasse zum walzen von schweren traegerprofilen oder schienen
DE2524224A1 (de) Verfahren und vorrichtung zum walzen von stabstahl
EP0342403A2 (fr) Calibrage pour les cylindres des cages de laminoir avec trois ou plusieurs des cylindres

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

17P Request for examination filed

Effective date: 19820614

AK Designated contracting states

Designated state(s): AT FR GB LU SE

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

Owner name: MANNESMANN AKTIENGESELLSCHAFT

Owner name: SVENSKT STAL AKTIEBOLAG

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

Owner name: MANNESMANN AKTIENGESELLSCHAFT

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT FR GB LU SE

REF Corresponds to:

Ref document number: 12593

Country of ref document: AT

Date of ref document: 19850415

Kind code of ref document: T

ET Fr: translation filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19851026

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

Ref country code: LU

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

Effective date: 19851031

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
GBPC Gb: european patent ceased through non-payment of renewal fee
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: 19860630

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: SE

Effective date: 19861027

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

Ref country code: GB

Effective date: 19881121

EUG Se: european patent has lapsed

Ref document number: 81903112.1

Effective date: 19870812