WO1994000254A1 - Capsule de chargement hydraulique pour laminoir de transformation des metaux - Google Patents

Capsule de chargement hydraulique pour laminoir de transformation des metaux Download PDF

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Publication number
WO1994000254A1
WO1994000254A1 PCT/GB1993/001346 GB9301346W WO9400254A1 WO 1994000254 A1 WO1994000254 A1 WO 1994000254A1 GB 9301346 W GB9301346 W GB 9301346W WO 9400254 A1 WO9400254 A1 WO 9400254A1
Authority
WO
WIPO (PCT)
Prior art keywords
ram
casing
load capsule
retraction
hydraulic
Prior art date
Application number
PCT/GB1993/001346
Other languages
English (en)
Inventor
Arnold Rodney Smith
Original Assignee
Davy Mckee (Sheffield) Limited
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 Davy Mckee (Sheffield) Limited filed Critical Davy Mckee (Sheffield) Limited
Publication of WO1994000254A1 publication Critical patent/WO1994000254A1/fr

Links

Classifications

    • 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
    • B21B31/16—Adjusting or positioning rolls
    • B21B31/20—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis
    • B21B31/32—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis by liquid pressure, e.g. hydromechanical adjusting

Definitions

  • the present invention is concerned with the structure of an hydraulic load capsule for adjusting the vertical position of a roll in a rolling mill stand and particularly with an hydraulic retraction mechanism for the load capsule.
  • the capsule comprises a ram which is adapted to engage a chock of a mill roll.
  • the ram is slidably mounted in a casing and the casing is adapted to be mounted on the housing of a roll mill stand.
  • the ram is hydraulically extensible from the casing to load the chocks of the roll.
  • a piston and cylinder retraction mechanism is mounted to act between the ram and the housing in order to retract the ram.
  • the retraction mechanism consists of two jacks provided by hydraulic piston and cylinder devices. The jacks are mounted one to each of opposite sides of the top of the casing.
  • the casing is received vertically upwardly through a mounting hole in the roll mill housing.
  • the top end of the hydraulic ram which projects from the casing, is engaged by a bridging structure which secures the upper end of the ram to the two piston and cylinder devices.
  • a bridging structure which secures the upper end of the ram to the two piston and cylinder devices.
  • the conventional hydraulic load capsule requires on-site assembly and testing, because the retraction mechanism must be mounted on the mill housing adjacent the rest of the load capsule. Also, the mill housing must be suitably prepared with mountings for the retraction mechanism. Because more than one jack is used, spaced from the axis of the ram, the forces applied by the retraction mechanism may be off-axis causing undue wear.
  • the present invention provides an hydraulic load capsule for a metal working rolling mill comprising a casing adapted to be mounted on a mill housing, a ram slidably received in the casing and engaged by a hydraulic extension mechanism operable between the ram and the casing to extend the ram from the casing and a retraction mechanism operable to enable retraction of the ram into the casing, characterised in that the retraction mechanism engages between the ram and the casing.
  • the retraction mechanism can most conveniently be provided by a hydraulic piston and cylinder assembly concentrically mounted around the ram, although non- hydraulic retraction mechanisms such as a motor driven worm drive might be used.
  • the load capsule made according to the present invention can be made for integral transport and installation, thus permitting full factory testing and hence reducing the risk of on-site failure. Furthermore, the amount of work involved in installation, or removal is reduced because there is only one mounting as opposed to the three required of the prior art load capsule.
  • the load capsule By making the load capsule integral and especially by making the retraction mechanism piston and cylinder concentric with the ram, the load capsule can be more compact than prior art load capsules thus reducing transport storage and packaging costs.
  • the retraction mechanism piston is a free floating annular piston concentrically mounted around the ram.
  • a latching mechanism may be provided to retain the ram in the retracted condition even when drained of hydraulic fluid.
  • the latching mechanism may be attached to the load cell after it is mounted or may be adapted to be received through the mounting hole for installation integrsal with the rest of the load cell so that the amount of on site assembly is minimised.
  • figure 1 is a sectional elevation of an hydraulic capsule mounted on a rolling Bill housing with the ram in an extended condition
  • figure 2 is a sectional elevation of the capsule and rolling mill housing of figure 1 with the ram retracted.
  • Figure 2a shows a modification of the first embodiment.
  • Figure 3 is an enlarged elevation showing part of a second embodiment to illustrate an alternative latching mechanism
  • Figure 4 is a sectional view of the second embodiment on the line IV-IV.
  • a housing 1 of a rolling mill there is shown a housing 1 of a rolling mill.
  • a mounting hole 2 is formed in the housing 1 to receive an hydraulic load capsule 3.
  • the hydraulic load capsule includes a ram 4 having a piston rod 4a.
  • the ram is extensible from a casing 5, downwardly, to engage a chock 6 of a roll mounted in the housing 1.
  • the ram 4 has a piston 7 which is received into a cylinder 8 formed in the casing 5. Hydraulic liquid can be supplied to or withdrawn from the cylinder 8 via a fluid passage 9 which communicates with a control manifold 10 mounted on the casing 5 above the housing.
  • the ram rod 4a extends upwardly through the tubular casing 5 and passes through low friction seals 11 before it extends through a second, retraction cylinder 12 formed in an upper part 5a of the casing 5.
  • An annular floating retraction piston 13 is slidably and concentrically mounted on the ram rod 4a to extend between the ram rod 4a and the retraction cylinder walls.
  • the uppermost end of the ram rod 4a is threaded to mount an elongate, tubular cap 14 which provides a collar 15 around the ram rod 4a against which the floating piston 13 abuts when hydraulic liquid is introduced to the underlying cylinder 12 via a fluid passage 16.
  • the upper part of the casing 5a is sealed by a closure plate 17 which is retained by bolts.
  • a latching mechanism 18 comprises two (or more) latch levers 18a, pivotally mounted on a collar 18b which is in turn secured to the exterior of the uppermost end of the tubular casing 5.
  • Each latch lever 18a is mounted to be pivoted between a securing position (shown in figure 2) and a releasing position (shown in figure l) by pneumatic cylinders 18c.
  • the uppermost end of the tubular cap 14 projects from the casing 5 and provides a latching collar 18d which extends radially from its axis.
  • the latching mechanism 18 In normal use the latching mechanism 18 is in the release position. However, when out of service, the ram 4 is retracted by the action of the retraction piston 13 so that the tubular cap 14 supports the collar away from the top of the casing 5. At this point the pneumatic cylinders 18c are operated to switch the latching mechanism to the securing position where the levers 18a engage with the underside of the collar 18d to prevent downward extension of the ram 4. This ensures that the ram 4 is safely secured in retracted position during maintenance.
  • the load capsules 3 is adapted to be mounted by making part of the casing 5 above the extension cylinder 8 of substantially uniform cross-section to be readily received into the mounting hole 2 which is of narrow section at an upper part 2a and of wider section at a lower part 2b to form a shoulder 2c.
  • a lower part 5b of the casing 5 adjacent the extension cylinder is of enlarged section to abut the shoulder 2c.
  • the capsule 3 is prevented from falling through the mounting hole 2 by means of a securing ring 19 which engages in an annular recess 20 formed in the upper part of the casing 5 to engage the upper surface of the housing 1.
  • the load capsule 3 can be manufactured, tested and then transported and installed without disassembly except for removal of the latch mechanism 18, during insertion of the upper end of the casing 5 through the hole 2.
  • the securing ring 19 is then emplaced and mounting of the load capsule 3 is completed with far less labour than is required of prior art load capsules. Completion of installation requires only attachment of the latch mechanism 18 and connection of the hydraulics control manifold 10.
  • the modification of the first embodiment in figure 2a differs from the previously described version of the load cell in that the latch levers 18a are rotated by rotary hydraulic actuators 18e instead of the pneumatic cylinders 18c.
  • hydraulic liquid is supplied via passages 9 to cylinder 8 thus extending the ram 4 to engage and load the roll chock 6.
  • hydraulic fluid is supplied to a port 21 and withdrawn from the port 16, in a controlled manner, thus displacing the floating piston 13 to the bottom of the floating retraction piston chamber, disengaging the floating retraction piston 13 from the ram 4, so that the ram can be freely extended.
  • the latch mechanism in the second embodiment shown in figures 3 and 4 is adapted to fit through the hole.
  • the rest of the load cell is similar to the load cell in the first embodiment.
  • the second latching mechanism comprises a pair of elongate upright arcuate braces 22 each supported by a pair of pneumatic or hydraulic piston and cylinder devices 23.
  • the pairs of devices 23 are mounted in parallel on opposite sides of the axis of the load cell.
  • the piston and cylinder devices 23 are mounted in cradles 24 secured to the closure plate 17.
  • the piston rods of the device 23 are retracted so that the braces 22 engage between the closure plate 17 and the collar 18d.
  • the braces When the hydraulic system is drained the braces are retained in place by the weight of the ram 4, and possible by a bias applied by a spring in the piston chamber acting on the piston.
  • the load cell can be inserted into, and removed from the housing with the latching mechanism in place in the drained and withdrawn condition.
  • the retraction mechanism is actuated to support the ram 4 and so relieve the braces 22 of the weight of the ram 4.
  • the piston and cylinder devices 23 are then actuated to extend the braces 22 radially away from the axis so that the collar 18d can be received between the braces 22 allowing the ram 4 to be lowered to engage the chock.
  • piston and cylinder devices 23 may be hydraulic or pneumatic and may be replaced by electric servo motors.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Actuator (AREA)

Abstract

Capsule de chargement hydraulique pour un laminoir de transformation des métaux possédant un bélier (4) pouvant coulisser dans un boîtier (5). Le bélier (4) comporte un piston hydraulique (7) situé à l'intérieur d'un cylindre (8) formé dans le boîtier (5). Le piston permet le dáplacement du bélier (4) à l'intérieur du boîtier (5) de façon à appliquer une charge sur l'empoise d'un cylindre du laminoir lorsque la cellule de chargement (3) est montée dans le carter (1) du laminoir. Pour permettre la rétraction du bélier (4) lors de l'entretien, un mécanisme de rétraction est constitué par un piston flottant (13) dans un cylindre (12) situé dans la partie supérieure du boîtier (5). Le piston flottant (13) vient en prise avec le bélier (4) uniquement pour le soulever de telle sorte qu'il n'y ait pas de risque que la charge appliquée au piston (4) du bélier soit transmise au circuit hydraulique du piston de rétraction, lors de l'utilisation. La cellule de chargement (3) peut être installée et retirée avec le mécanisme de rétraction en place.
PCT/GB1993/001346 1992-06-29 1993-06-28 Capsule de chargement hydraulique pour laminoir de transformation des metaux WO1994000254A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9213770.2 1992-06-29
GB929213770A GB9213770D0 (en) 1992-06-29 1992-06-29 An hydraulic load capsule for a metal working rolling mill

Publications (1)

Publication Number Publication Date
WO1994000254A1 true WO1994000254A1 (fr) 1994-01-06

Family

ID=10717894

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1993/001346 WO1994000254A1 (fr) 1992-06-29 1993-06-28 Capsule de chargement hydraulique pour laminoir de transformation des metaux

Country Status (2)

Country Link
GB (1) GB9213770D0 (fr)
WO (1) WO1994000254A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1044736A1 (fr) * 1999-04-16 2000-10-18 Vai Clecim Laminoir à serrage hydraulique
US8341994B2 (en) 2008-05-22 2013-01-01 Danieli & C. Officine Meccaniche S.P.A. Rolling mill stand and related rolling mill for longitudinally rolling rod-shaped bodies

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1927085A1 (de) * 1968-05-29 1969-12-04 Textron Inc Vorrichtung zur Regelung der Hoehe des Walzenspalts
FR2349372A1 (fr) * 1976-04-29 1977-11-25 Hoestemberghe & Kluetsch Gmbh Cage de laminoir avec dispositif positionneur hydraulique
EP0012382A1 (fr) * 1978-12-06 1980-06-25 Zaklad Doswiadczalny przy Zakladach Urzadzen Chemicznych "Metalchem" Laminoir pour la fabrication de tubes à ailettes
DE3210830A1 (de) * 1982-03-24 1983-10-06 Altajskij Nii Technologii Masi Walzgeruest

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1927085A1 (de) * 1968-05-29 1969-12-04 Textron Inc Vorrichtung zur Regelung der Hoehe des Walzenspalts
FR2349372A1 (fr) * 1976-04-29 1977-11-25 Hoestemberghe & Kluetsch Gmbh Cage de laminoir avec dispositif positionneur hydraulique
EP0012382A1 (fr) * 1978-12-06 1980-06-25 Zaklad Doswiadczalny przy Zakladach Urzadzen Chemicznych "Metalchem" Laminoir pour la fabrication de tubes à ailettes
DE3210830A1 (de) * 1982-03-24 1983-10-06 Altajskij Nii Technologii Masi Walzgeruest

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 9, no. 330 (M-442)25 December 1985 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1044736A1 (fr) * 1999-04-16 2000-10-18 Vai Clecim Laminoir à serrage hydraulique
FR2792229A1 (fr) * 1999-04-16 2000-10-20 Kvaerner Metals Clecim Laminoir a serrage hydraulique
US6170312B1 (en) 1999-04-16 2001-01-09 Vai Clecim Hydraulic load capsule for a metal working rolling mill
US8341994B2 (en) 2008-05-22 2013-01-01 Danieli & C. Officine Meccaniche S.P.A. Rolling mill stand and related rolling mill for longitudinally rolling rod-shaped bodies
US8640516B2 (en) 2008-05-22 2014-02-04 Danieli & C. Officine Meccanicite S.p.A. Rolling mill stand and related rolling mill for longitudinally rolling rod-shaped bodies
US9180502B2 (en) 2008-05-22 2015-11-10 Danieli & C. Officine Meccaniche S.P.A. Rolling mill stand and related rolling mill for longitudinally rolling rod-shaped bodies

Also Published As

Publication number Publication date
GB9213770D0 (en) 1992-08-12

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