EP0342403B1 - Kalibrierung für die Walzen von Walzgerüsten mit drei oder mehr Walzen - Google Patents

Kalibrierung für die Walzen von Walzgerüsten mit drei oder mehr Walzen Download PDF

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Publication number
EP0342403B1
EP0342403B1 EP89107593A EP89107593A EP0342403B1 EP 0342403 B1 EP0342403 B1 EP 0342403B1 EP 89107593 A EP89107593 A EP 89107593A EP 89107593 A EP89107593 A EP 89107593A EP 0342403 B1 EP0342403 B1 EP 0342403B1
Authority
EP
European Patent Office
Prior art keywords
pass
rolls
cross
cloverleaf
roll
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
EP89107593A
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German (de)
English (en)
French (fr)
Other versions
EP0342403A2 (de
EP0342403A3 (en
Inventor
Claus Schlanzke
Günter Kirchmann
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.)
SMS Siemag AG
Original Assignee
SMS Schloemann Siemag 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 SMS Schloemann Siemag AG filed Critical SMS Schloemann Siemag AG
Priority to AT89107593T priority Critical patent/ATE78725T1/de
Publication of EP0342403A2 publication Critical patent/EP0342403A2/de
Publication of EP0342403A3 publication Critical patent/EP0342403A3/de
Application granted granted Critical
Publication of EP0342403B1 publication Critical patent/EP0342403B1/de
Anticipated expiration legal-status Critical
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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
    • B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section

Definitions

  • the invention relates to a roll stand with a multi-pass rolling of full cross sections, e.g. Steel bars and wire, used roll calibers, in which the rolls form a cloverleaf profile caliber with curved bulges and indentations within a caliber series including roll calibres, the rollers in the caliber series being alternately offset by half a pitch angle and the number of bulges the cloverleaf profile caliber determines the number of rollers.
  • full cross sections e.g. Steel bars and wire
  • used roll calibers in which the rolls form a cloverleaf profile caliber with curved bulges and indentations within a caliber series including roll calibres, the rollers in the caliber series being alternately offset by half a pitch angle and the number of bulges the cloverleaf profile caliber determines the number of rollers.
  • Such rolls which are arranged in successive roll stands of a rolling mill and form cloverleaf profile calibers, have become known from FR-A 532 438.
  • roller calibers With these roller calibers, almost width-free rolling with pressure deformation can be achieved, which occurs not only in the area of the indentations, but also in the rest of the area of the rolling stock.
  • Rolling mills with four rolls are also known (DE-AS 24 62 279) for converting square billets into octagonal cross sections, which can be used in the same way as round cross sections as the starting material for roughing in a cross-rolling mill with planetary drive. While the square billets are stretched over their four corners by obtuse-angled wedge-shaped or triangular-shaped caliber incisions with a 135 ° surface inclination and exact octagonal corners are formed there, this is not the case at the four diagonally opposite points in the area of the roll gaps. However, since the octagonal billets produced are only an intermediate product for further processing, the deviation of the profile shape from an exact octagonal cross section is meaningless. The focus of this development is based on the basic principle of the cross rolling mill itself, which is a uniform stretching of the rolling stock, i.e. allowed without spread and with all the associated advantages.
  • the invention is based on the consideration that the decrease in thickness or height imposed on the rolling stock during rolling usually goes hand in hand with an increase in length and an increase in width, and that the increase in width is actually a loss deformation, not only because only part of the decrease in height is implemented in extension, but instead Furthermore, the spreading leads to a greater decrease in height in the subsequent passes and thus ultimately to a larger number of passes or number of roll stands.
  • the invention is based on the object of specifying a calibration for the rolls of a generic roll stand without the disadvantages mentioned, with which an almost width-free rolling is possible in the area of the indentations and in the area of the bulges no or only slight compression deformation of the rolling stock.
  • This object is achieved according to the invention in that the boundary surfaces of a cloverleaf caliber or round caliber assigned to the dividing planes or rolling gaps run symmetrically to them and at a distance from the center of the caliber that is equal to or somewhat larger than the peripheral surface of the inlet cross section assigned to the boundary surfaces or of the pre-caliber.
  • the invention is based on the knowledge that the geometry of a cloverleaf caliber in the area of its indentations on the by far largest circumference of the respective inlet cross-section leads to a substantial decrease in height with a corresponding increase in length, which is communicated to the comparatively smaller circumferential zones between the indentations, in which no or no significant spreading or decrease in height take place.
  • a cloverleaf caliber with four protrusions is preferred, which means that the rolling stock is deformed with four rollers in two planes. Since an increase in length takes place approximately uniformly over the entire cross section, this type of deformation is particularly suitable for high-alloy stainless steels, e.g. B. for such qualities that were not previously rollable due to the risk of edge cracking or residual residual stresses in cross section.
  • the ratio between the radius of curvature of the indentations and that of the indentations of a cloverleaf caliber should be at least 1.4: 1 for four roller calibers.
  • the calibration according to the invention is aimed in particular at the production of round full cross sections, it is advisable to provide further round calibers at the end of the caliber series at the locations where the round cross sections with commercially available diameters as the finished cross section, in addition to the one or more sizing roller round calibers are rollable. Any finished cross-sections can then be removed while the subsequent rolling stands are shut down, since round material can be rolled from each cloverleaf cross-section.
  • the circular cross sections can also be used as initial cross sections for profile cross sections, e.g. B. square, angle, etc.
  • the known four-roll stand 1 consists of a cassette-like stand 2 with a pair of horizontal rolls 3 and a pair of vertical rolls 4, all rolls being arranged in a common vertical plane. Only the horizontal rollers 3 1 and 3 2 of the pair of horizontal rollers 3 are driven, whereas the vertical rollers 4 1 and 4 2 of the pair of vertical rollers 4 operate as drag rollers.
  • rollers 3 1, 3 2 and 4 1, 4 2 have - as can be seen more clearly from FIG. 2 - fully cut caliber incisions which result in a cloverleaf caliber 5 with four bulges 5a which are assigned to the parting planes E of the rolls.
  • the rollers with their caliber-free conical surfaces 6 are not adjustable against each other, which allows the rollers to be preloaded. In the context of the invention, however, this is not absolutely necessary because - as shown in FIG. 1, there may also be nips 7 between the pairs of rollers 3 and 4.
  • the boundary surfaces 8 assigned to the bulges 5a of a cloverleaf caliber 5 are always assigned to the division planes E or the roll gaps 7 and are symmetrical with respect to these division planes or roll gaps.
  • the boundary surfaces 8 of the bulges 5a are evenly curved with a radius of curvature 9 which is smaller than the distance 10 of the boundary surfaces 8 from the center of the caliber M.
  • the working surfaces 12 of the recesses 5b of the trefoil caliber lying between the bulges 5a have a comparatively larger radius 5, which thus extend over a larger arc angle ⁇ than the sum of the adjacent portions of the boundary surfaces 8 of the bulges 5a of each roller. 2, the ratio between the radius of curvature 11 and the radius of curvature 9 is approximately 1.4: 1.
  • the position of the center of curvature 13 for the radius of curvature 11 of the working surfaces 12 of the indentations 5b of each cloverleaf caliber 5 determine the decrease in height 14 with respect to the round inlet cross-section 15 indicated by dashed lines, which can be a tapping cross-section.
  • the dimensions of the cloverleaf caliber 5 are selected such that the boundary surfaces 8 of the bulges 5a run at a distance 10 from the center of the caliber M which is the same or - as FIG. 2 shows - somewhat larger than the peripheral zone 15a of the inlet cross-section 15 assigned to them or of the pre-caliber.
  • the circumferential zones of the inlet cross section 15 assigned to the arc angle ⁇ and the decrease in height 14 are shown hatched in FIG. 2, which are subject to a strong compression deformation with a corresponding increase in length.
  • no noteworthy increases in width take place in the peripheral zones 15a of the inlet profile 15 in the region of the bulges 5a of the cloverleaf caliber 5, since the caliber 5 remains underfilled in the region of the boundary surfaces 8 of the bulges 5a. H. that there is no decrease in height here either.
  • FIG. 3 shows the sequence of two cloverleaf calibers for four roller pairs 16 and 17, which also move together.
  • the boundary surfaces 19 run in the region of the bulges 18a of the cut clover leaf caliber 18 symmetrically to the parting planes E of the roller pairs 16, 17 and at a greater distance from the center caliber M than the associated circumferential zones 20a of the clover leaf-shaped inlet cross-section 20 shown in broken lines the work surfaces 21 in the region of the bulges of the inlet cross-section 20 in the upstream roll stand run symmetrically to the parting planes E 1 thereof, the roller pairs 16, 17 according to FIG. 3 are offset by half the parting angle ⁇ compared to the roll pairs of the roughing stand, not shown.
  • the sequence of cloverleaf calibers 20, 18 according to FIG. 3 clearly shows how large the sum of the compression-deformed, hatched zones whose partial increases in length radiate onto the areas of the caliber bulges 18.
  • FIG. 4 shows a caliber sequence "cloverleaf-round", the cloverleaf-shaped inlet cross section 22 shown in broken lines can be the outlet profile corresponding to the cloverleaf caliber 18 according to FIG. 3.
  • the roller pairs 24 and 25 carrying the round profile 23 are again with their parting planes E2 by half the parting angle ⁇ compared to the parting planes E. of the roller pairs 16, 17 offset according to FIG. 3. It also applies to the circular caliber 23 that the boundary surfaces 26 assigned to the division planes E 2 run at the same or somewhat greater distance from the center of the caliber M than the peripheral surfaces of the inlet cross section 22 with the zone width 27 assigned to them.
  • the round cross section leaving the roller pairs 24, 25, corresponding to the round caliber 23, can be a commercially available round finished cross section in diameter, so that it is advisable to arrange at least one round caliber as a sizing roll caliber in order to be able to subtract the finished cross section in a particularly close tolerance.
  • FIG. 5 shows three rollers 30, 31, 32 which have been moved one on top of the other and into which a trefoil caliber 33 with three bulges 33a is cut.
  • the inlet cross-section 34 shown in dashed lines is a round cross-section.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Control Of Metal Rolling (AREA)
  • Crushing And Grinding (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
EP89107593A 1988-05-18 1989-04-27 Kalibrierung für die Walzen von Walzgerüsten mit drei oder mehr Walzen Expired - Lifetime EP0342403B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89107593T ATE78725T1 (de) 1988-05-18 1989-04-27 Kalibrierung fuer die walzen von walzgeruesten mit drei oder mehr walzen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3816840 1988-05-18
DE3816840A DE3816840A1 (de) 1988-05-18 1988-05-18 Kalibrierung fuer die walzen von walzgeruesten mit drei oder mehr walzen

Publications (3)

Publication Number Publication Date
EP0342403A2 EP0342403A2 (de) 1989-11-23
EP0342403A3 EP0342403A3 (en) 1990-06-13
EP0342403B1 true EP0342403B1 (de) 1992-07-29

Family

ID=6354581

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89107593A Expired - Lifetime EP0342403B1 (de) 1988-05-18 1989-04-27 Kalibrierung für die Walzen von Walzgerüsten mit drei oder mehr Walzen

Country Status (4)

Country Link
EP (1) EP0342403B1 (ja)
JP (1) JPH0215810A (ja)
AT (1) ATE78725T1 (ja)
DE (2) DE3816840A1 (ja)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0368049A3 (de) * 1988-11-10 1991-07-24 Sms Schloemann-Siemag Aktiengesellschaft Kalibrierung für die Walzen von Walzgerüsten mit drei oder mehr Walzen
DE19654063A1 (de) * 1996-12-23 1998-06-25 Schloemann Siemag Ag Verfahren und Anlage zur Herstellung von Stabstahl mit durch Schmiedewalzen verfeinertem und/oder verdichtetem Gefüge
IT1290131B1 (it) * 1997-03-20 1998-10-19 Pomini Spa Treno di laminazione e relativo procedimento di laminazione a resa migliorata
US20030184135A1 (en) * 2002-03-27 2003-10-02 Bugle Clifford M. Bicycle seat rail and method of making same
WO2017147430A1 (en) * 2016-02-25 2017-08-31 Unarco Industries Llc Device for forming grooved wire

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE26893C (de) * GEBR. SCHMIDT in Schwelm Drahtwalzwerk, bestehend aus vier Walzen mit cannelirtem Kaliber
DE23230C (de) * GEBRÜDER SCHMIDT in Schwelm, Westfalen Drahtwalzwerk, bestehend aus drei Walzen mit canelirtem Kaliber
FR532438A (fr) * 1920-09-16 1922-02-03 Procédé de fabrication de fils et barres métalliques
DE2035482C2 (de) * 1968-12-12 1983-01-20 Kocks Technik Gmbh & Co, 4010 Hilden Walzenkalibrierung für Feineisen-, insbesondere für Drahtwalzstraßen
DE2418453B2 (de) * 1974-04-17 1976-09-16 Ausscheidung in: 24 62 279 Schloemann-Siemag AG, 4000 Düsseldorf Ausgangsmaterial fuer das walzen von draht oder feineisen auf schraegwalzwerken mit planetenantrieb

Also Published As

Publication number Publication date
DE3816840A1 (de) 1989-11-30
DE58901922D1 (de) 1992-09-03
JPH0215810A (ja) 1990-01-19
ATE78725T1 (de) 1992-08-15
EP0342403A2 (de) 1989-11-23
EP0342403A3 (en) 1990-06-13

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