EP0065533A1 - 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.

Info

Publication number
EP0065533A1
EP0065533A1 EP81903112A EP81903112A EP0065533A1 EP 0065533 A1 EP0065533 A1 EP 0065533A1 EP 81903112 A EP81903112 A EP 81903112A EP 81903112 A EP81903112 A EP 81903112A EP 0065533 A1 EP0065533 A1 EP 0065533A1
Authority
EP
European Patent Office
Prior art keywords
universal
profile
rolling
web
stand
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP81903112A
Other languages
German (de)
English (en)
Other versions
EP0065533B1 (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

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 preliminary profile in a universal carrier line, which comprises at least one compression frame, in which a preliminary profile is assumed, which is only on the outside of the web in the central region straight and in the adjoining transition areas of the flanges which have bevels which form an obtuse angle with the straight line of the central area, and in which the overfillings or bulges which occur in universal stretching and widening stitches at the transition areas opposite the free end areas of the flange edges between The web and flanges are rolled in at least one upsetting stitch while stretching the web of the rolled profile.
  • 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 upper roller and the lower roller of the compression stand when rolling U-steel using a universal roller train, but the solution is one other.
  • Inclines in whose area bulges occur in universal stitches, which are rolled in upsetting stitches while stretching the web of the rolled profile, provides the solution according to the invention that when rolling in the bulges at the transition areas in the or the upset stitches, the inclinations in their inclination be restored 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 finished as known in a universal valving stand, possibly after previous universal stretching stitches in closed calibres and Upset stitches.
  • the obtuse angle of inclination of the bevels of the preliminary profile which they form with the straight central region of the outside of the web should not be less than 130 degrees in a further embodiment of the method according to the invention, and the central straight region should be equal to or a few millimeters smaller than the web width of the finished profile. If the oblique angle of inclination of the bevels is too small or if the inclination of the bevels is too large with respect to the horizontal, too much material is spread or bulges in the area of the bevels at universal stitches at the expense of stretching.
  • 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 stands must then be set up to form closed calibers, i.e. that the vertical rolls can enter between horizontal rolls.
  • the rollers of the compression stands which are assigned to the outside of the web of the preliminary profile, have a profile which is congruent with the contour of the outside of the preliminary profile, including the inclines, for rolling away the bulges in the region of the bevels.
  • a universal carrier line for carrying out the method according to the invention in reversing operation expediently comprises only one universal stand with adjustable rolls and only one upsetting stand with adjustable profiled horizontal rolls in tandem arrangement, as well as a universal finishing stand at a distance which enables the rolling stock to flow freely after the last upsetting stitch.
  • This arrangement is known per se.
  • the horizontal roller of the compression frame assigned to the outside of the web of the preliminary profile, preferably the lower roller, a profile congruent with the contour of the outside including the bevels, and the adjustable vertical rollers of the universal device have a shoulder at the level of the rolling line, which is predetermined by the fixed horizontal roller assigned to the web outside of the preliminary profile, in such a way that the rolled bales of the vertical rollers are able to overlap the bale length of the stationary horizontal roller as the employment progresses.
  • This special type of universal vertical rolls with stepped diameters makes it possible to switch to rolling with closed universal calibres if the bevels follow the previous universal stretching and. Widening stitches with open calibers are used up.
  • the size of the shoulders of the vertical rolls, which are able to encompass the bale length of the horizontal roll that cannot be set, is determined by the minimum flange thickness of the intermediate profile that is intended to be rolled.
  • FIG. 1 shows a schematic representation of a stand arrangement for rolling U-steel on a universal carrier line in reversing operation
  • FIG. 2 shows the cross section of the preliminary section emerging from a rough stand with the bevels according to the invention
  • FIG. 3 shows schematically the roll arrangement of a universal stand with the design according to the invention the vertical rollers
  • FIG. 4 schematically shows the roll arrangement of an edging stand with the contour of the lower roll according to the invention
  • Fig. 5 to 7 some work stages in the universal roughing stand or in the edging stand during the stitch bear processing of the preliminary profile, the right part of the figures reproducing the production of parallel-flanged U-steel
  • FIG. 8 the finishing table in the universal finishing stand, shown for a parallel-flanged U-steel.
  • the roughing stand 1 is followed at some distance by a stand combination consisting of a universal rolling 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) such that e / s in the transition region below the flanges 6 on the underside 7a of the web 7 deviate from the surface that is still straight in the central region M of the web 7 and with bevels 8 is trained. 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 areas, the radii being booked out with the first universal stitch in order to be subsequently engraved 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 rollers are designed so that they are changed in their diameter approximately at the height of the rolling line W and there have a paragraph 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 dimension of the flanges 6 is progressively reduced, for example down to the 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 upset valve 15 has the same contour as that of the underside of the web 7 of the preliminary profile according to FIG. 2, i.e. especially 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 the other part of the upsetting roller 16 presses on the edges of the flanges 6.
  • the preliminary profile 5 is reversed upset after the first universal stitch, for example by initially two stitches. Then the U-profile comes back into the universal stand 2, where with two more universal stitches a great reduction in the pre-profile is achieved, because with each stitch the rollers are adjusted according to the acceptance on the rolling stock.
  • 3 illustrates the reduction in the profile 5 which has already been achieved after the third universal stitch.
  • the vertical rollers 13 begin to overlap the fixed lower roller 11 due to the shoulders 14.
  • the slopes 8 of the preliminary profile are almost completely used up, ie the bulges 8a of these stitches fill the intermediate profile according to FIG. 5 in the edge region.
  • 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 is 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 occurs Pierce the universal finishing stand 4 and, as shown in FIG. 8 for a parallel-flanged U-steel, receives its finished profile 5 '.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Lining And Supports For Tunnels (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

Le profile en acier en forme d'U ou analogue est produit par laminage sur un train a poutrelles universel d'un profile ebauche (7) en forme d'U. Il est chanfreine dans une zone de transition entre les cotes exterieurs de la traverse et les flancs. Des renflements (8a) se forment vers lesdits chanfreins a chaque passe de laminage avec les rouleaux horizontaux (11, 12) et les rouleaux verticaux (13). Ces renflements sont constamment lamines lors des passes d'ecrasement executees avec des rouleaux profiles horizontaux d'ecrasement (15, 16) et meme lors de la reconstitution des chanfreins (17) et jusqu'a ce que, dans une passe de laminage universel d'ecrasement des chanfreins, ceux-ci aient disparu par le rapprochement des rouleaux verticaux. Le profil intermediaire a aretes vives ainsi cree dans la zone de transition est encore lamine jusqu'a l'obtention du profil definitif au calibre universel. Le chassis universel pour le laminage du profile ebauche et du ou des profils intermediaires a aretes vives presente des rouleaux verticaux (13) avec des epaulements (14), sorte que ces rouleaux verticaux puissent se chevaucher par engagement continu avec leur table de cylindre disposee sous le rouleau horizontal (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 true EP0065533A1 (fr) 1982-12-01
EP0065533B1 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

Family Cites Families (3)

* 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
JPS5412905B2 (fr) * 1973-08-25 1979-05-26

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8201484A1 *

Also Published As

Publication number Publication date
NO822094L (no) 1982-06-22
WO1982001484A1 (fr) 1982-05-13
DE3040325A1 (de) 1982-06-03
NO153642C (no) 1986-04-30
NO153642B (no) 1986-01-20
JPS57501994A (fr) 1982-11-11
EP0065533B1 (fr) 1985-04-10

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