EP0339033B1 - Zweiwalzenschrägwalzwerk zum lochen und strecken von massiv- und hohlblöcken - Google Patents

Zweiwalzenschrägwalzwerk zum lochen und strecken von massiv- und hohlblöcken Download PDF

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Publication number
EP0339033B1
EP0339033B1 EP88900345A EP88900345A EP0339033B1 EP 0339033 B1 EP0339033 B1 EP 0339033B1 EP 88900345 A EP88900345 A EP 88900345A EP 88900345 A EP88900345 A EP 88900345A EP 0339033 B1 EP0339033 B1 EP 0339033B1
Authority
EP
European Patent Office
Prior art keywords
stand
halves
rolling mill
double roller
mill according
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
EP88900345A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0339033A1 (de
Inventor
Johann Heinrich Rohde
Hans Meurer
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 AT88900345T priority Critical patent/ATE65435T1/de
Publication of EP0339033A1 publication Critical patent/EP0339033A1/de
Application granted granted Critical
Publication of EP0339033B1 publication Critical patent/EP0339033B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
    • B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/02—Rolling stand frames or housings; Roll mountings ; Roll chocks
    • B21B31/04—Rolling stand frames or housings; Roll mountings ; Roll chocks with tie rods in frameless stands, e.g. prestressed tie rods

Definitions

  • the invention relates to a two-roll cross-rolling mill for punching solid and hollow blocks, in which the rolls are adjustably arranged in the roll stand.
  • Cross roll mills have been used for many years, particularly in steel tube production. They have been continuously improved and developed.
  • the current state of the art is represented by DE-C-21 56 595.
  • the rolling stand of this system is equipped with rollers lying one above the other and with swiveling and adjustable guide disks arranged on the side.
  • the rollers themselves are mounted in roller mills, which are held in a vertically adjustable manner by a roller stand.
  • the roller mills are adjusted by two motor-driven threaded spindles, which are kept free of play by a hydraulic retention cylinder.
  • the so-called feed angle of the rolls which causes the helical movement of the rolling stock, can be changed.
  • the roller mills are designed as drums that can rotate in the stand.
  • the feed angle is infinitely adjustable, unless the roller mills are adjusted in a simplified embodiment by supplements.
  • the adjustment of the feed angle is not infinitely variable; in addition, the conversion of the rolling stand is time-consuming.
  • the present invention has for its object to provide a two-roll cross-rolling mill, which does not have the disadvantages described and allows a simple and short-term roll change or stand change with low height and low-expansion design with little mechanical effort.
  • the roll stand is divided into two stand halves, each holding a roll and possibly its chocks, and detachably connected stand halves, and the stand halves for adjusting the feed angle of the rolls can be pivoted relative to one another about a common axis that intersects the rolling stock axis at a right angle are.
  • a stationary central frame connected to the foundation is preferably provided between the stand halves which can be pivoted relative to one another.
  • the overall height can be made significantly lower because the large-dimensioned roller mills are eliminated.
  • the adjustment of the feed angle can be carried out continuously by pivoting the stand halves against each other and with them the rollers displaced in the chocks of the stand halves. In this way, the total height of the roll stand can be reduced by approximately 50% with the same roll diameter. This is accompanied by a weight reduction of at least approx. 50%.
  • connection of the stand halves takes place by means of prestressed tie rods penetrating the stand halves on both sides of the rolling stock axis, with a side play allowing the stand halves to be rotated between the tie rods and the bores of the stand halves penetrated by them. Due to the relatively short tie rods prestressing the stand, the spring deflection of the stand is minimized in such a way that substantially improved tolerances of the rolling stock can be achieved.
  • the tie rods penetrating and connecting the stand halves can be designed as stud bolts which are fastened to the central frame on both sides.
  • the prestressing of the stand halves against one another or against the central frame can be applied in a known manner by means of hydraulic clamping nuts; the preload is released before twisting the halves against each other.
  • the tie rods penetrating the central frame are rotatably mounted therein and are provided at both ends with threads of different pitch direction in the bore through which they penetrate each stand half, and adjusting nuts with a corresponding counter thread are arranged in the stand halves.
  • the bores of the middle frame are provided in the region of their ends facing the scaffold halves with threads of different pitch directions, in which threaded bushes provided with a corresponding external thread are rotatably and axially adjustable, with the threaded bushes on the inside of them the multi-wedge profiles applied to the tie rods correspond and the tie rods for the opposite adjustment of the threaded bushes acting with their end faces on the thread halves in the sense of a movement towards or away from each other are rotatably mounted and at least one joint of the tie rod interacts with a piston-cylinder unit, with which the prestressing force of the scaffold can be applied.
  • This proposal allows both the setting of the scaffold halves against each other and the prestressing via the tie rods.
  • the adjustment mechanism for synchronously rotating the stator halves is supported on the foundation of the roll stand and / or on the middle frame.
  • the adjustment can be carried out by synchronously operating piston-cylinder units, gears or counter-rotating eccentrics.
  • the middle frame accommodate the known guides for the rolling stock, such as inserts and versions, side guides, swivel arms for washer disks or the like. These parts can remain stationary together with the middle frame if the rollers have to be changed.
  • the latter is done according to a favorable feature of the invention after loosening the connection of the stator halves in that at least one of the rollers and their chocks can be removed together with the respective stator half.
  • the dismantled stand half can be replaced as quickly as possible with another stand half that has already been prepared, after the second chock with the counter roller has been replaced with another.
  • the parting plane between the stand halves can run both horizontally and vertically.
  • Fig. 1 denotes the central frame connected to the foundation 7, which carries the upper stand half 2 and the lower stand half 3 of the two-roll cross-rolling mill according to the invention.
  • the rollers are designated 4 (top roller) and 5 (bottom roller), 6 numbers one of the two guide disks which are mounted on the middle frame 1 by means of known swivel arms.
  • the rolling axis is indicated at 8 in FIG. 1.
  • the upper stand half 2 and the lower stand half 3 are held together with the aid of tie rods 9, four of which are provided on both sides of the rolling stock axis, possibly under tension.
  • the open holes on one side for the tie rods in the upper half of the stand allow the tie rods to be relaxed beforehand and the stand halves to be rotated to a 0-degree feed angle without removing any other parts.
  • the adjusting gear 16 are provided in the lower half of the stand. Since the rollers 4 and 5 are mounted in chocks 23, 24 of known type in the respective stator halves, the rollers are adjusted by rotating the stator halves.
  • a construction as shown in FIG. 3 is provided for adjusting the rollers in the vertical direction.
  • the tie rod 9 penetrates the upper and lower stator halves 2 and 3 and the middle frame 1.
  • nuts 13 which are provided with the same but opposite internal threads.
  • threaded bushings 14 move in opposite directions due to the different thread pitches when they are turned.
  • a drive motor 16 at one end of the tie rod serves to rotate the tie rod; the other tie rod end 17 is designed as an abutment of the tie rod.
  • a hydraulic piston 17 is provided for applying prestressing forces, which cooperates with the hydraulic cylinder 18 and, when pressurized with pressure medium, applies a tensile force to the tie rod 9 in order to brace the frame halves 2 and 3 against one another.
  • the scaffolding halves 2 and 3 are adjusted against each other as described below:
  • the tie rod is relaxed. This can now be rotated via the drive motor 16, the threaded bushings 14 being rotated via the splined shaft profile 15 and being moved in the axial direction.
  • the threaded bushes 14 press with their end faces against support rings 19, which in turn press the frame halves 2 and 3 apart.
  • the upper end of the tie rod is held by a threaded bushing 20 and corresponding thread, so that the lower stand half 3 does not fall down due to its own weight.
  • the swivel drives 11 shown in FIGS. 1 and 2 can be actuated for the scaffold halves, the movement of which is blocked after the scaffold halves have been braced during the rolling operation.
  • FIG. 5 shows an example of how the roll removal can take place in the new two-roll cross-rolling mill.
  • the scaffold halves 2 and 3 are expediently set to a feed angle of 0 degrees and the upper scaffold half 2 is attached to a hoist and this together with the upper roller 4 and the lower roller 5 attached to it by means of a connecting element 22 upwards pulled out of the lower half of the scaffold 3 and the middle frame.
  • a correspondingly prepared new set of rollers can be used in the same way, so that the stand change times can be extremely short and the effort involved in changing the stand can be kept low.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Paints Or Removers (AREA)
EP88900345A 1986-12-23 1987-12-21 Zweiwalzenschrägwalzwerk zum lochen und strecken von massiv- und hohlblöcken Expired - Lifetime EP0339033B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88900345T ATE65435T1 (de) 1986-12-23 1987-12-21 Zweiwalzenschraegwalzwerk zum lochen und strecken von massiv- und hohlbloecken.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863644783 DE3644783A1 (de) 1986-12-23 1986-12-23 Zweiwalzenschraegwalzwerk zum lochen und strecken von massiv- und hohlbloecken
DE3644783 1986-12-23

Publications (2)

Publication Number Publication Date
EP0339033A1 EP0339033A1 (de) 1989-11-02
EP0339033B1 true EP0339033B1 (de) 1991-07-24

Family

ID=6317416

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88900345A Expired - Lifetime EP0339033B1 (de) 1986-12-23 1987-12-21 Zweiwalzenschrägwalzwerk zum lochen und strecken von massiv- und hohlblöcken

Country Status (5)

Country Link
US (1) US4976127A (ja)
EP (1) EP0339033B1 (ja)
JP (2) JPH02501992A (ja)
DE (2) DE3644783A1 (ja)
WO (1) WO1988004583A1 (ja)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0312442A (ja) * 1989-06-09 1991-01-21 Central Glass Co Ltd 含フッ素樹脂分散体
US5142893A (en) * 1991-05-17 1992-09-01 Italimpianti Of America, Inc. Tube mill
EP2602031B1 (de) 2011-12-09 2015-05-20 SMS Meer GmbH Kegelschrägwalzwerk zum Herstellen nahtloser Rohre
PL234617B1 (pl) * 2018-04-09 2020-03-31 Lubelska Polt Urządzenie do rozdrabniania struktury z prowadnicami stałymi

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1514425A (en) * 1921-05-14 1924-11-04 Mackintosh Hemphill Company Tube-reducing mill
BE347483A (ja) * 1927-04-13
DE1271064B (de) * 1963-08-21 1968-06-27 Contubind Sa Schraegwalzwerk mit fliegend in je einem Staender gelagerten Walzen
US3475940A (en) * 1967-07-18 1969-11-04 Mesta Machine Co Fall-away spacer block
JPS4838611A (ja) * 1971-09-17 1973-06-07
JPS5215162B2 (ja) * 1971-09-18 1977-04-27
JPS4838455A (ja) * 1971-09-20 1973-06-06
DE2156595C3 (de) * 1971-11-11 1980-01-24 Mannesmannroehren-Werke Ag, 4000 Duesseldorf Rohrschrägwalzwerk
DE7311105U (ja) * 1973-03-21 1973-06-28 Mannesmann Meer Ag
JPS5316791B2 (ja) * 1974-02-18 1978-06-03
JPS529703A (en) * 1975-07-10 1977-01-25 Isamu Mitsunaka Internal combustion engine of no public harm
JPS5221524A (en) * 1975-08-12 1977-02-18 Nissan Motor Co Ltd Evaporated fuel controller of an internal combustion engine
DE2540729C3 (de) * 1975-09-10 1978-03-16 Mannesmann Ag, 4000 Duesseldorf Einrichtung zur Schräganstellung der Walzen eines Schrägwalzwerkes
JPS5342052A (en) * 1976-09-28 1978-04-17 Nec Corp Optical signal detector
JPS5510624A (en) * 1978-07-07 1980-01-25 Nippon Telegr & Teleph Corp <Ntt> Discrimination processing method for handwritten english alphabet, numeral and symbol
DE3132712C2 (de) * 1981-08-19 1985-09-12 Kocks Technik Gmbh & Co, 4010 Hilden Rohrschrägwalzgerüst

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Patent Abstracts of Japan, Band 7, Nr. 207 (M-242)(1352), 13. September 1983, & JP, A, 58103904 (ISHIKAWAJIMA HARIMA JUKOGYO K.K.) 21. Juni 1983 *

Also Published As

Publication number Publication date
US4976127A (en) 1990-12-11
JPH0722765B2 (ja) 1995-03-15
EP0339033A1 (de) 1989-11-02
WO1988004583A1 (en) 1988-06-30
DE3644783C2 (ja) 1990-04-19
DE3644783A1 (de) 1988-07-07
JPS63502121A (ja) 1988-08-18
JPH02501992A (ja) 1990-07-05
DE3771732D1 (de) 1991-08-29

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