EP0163247A2 - Indicating device for roll adjusting - Google Patents

Indicating device for roll adjusting Download PDF

Info

Publication number
EP0163247A2
EP0163247A2 EP85106246A EP85106246A EP0163247A2 EP 0163247 A2 EP0163247 A2 EP 0163247A2 EP 85106246 A EP85106246 A EP 85106246A EP 85106246 A EP85106246 A EP 85106246A EP 0163247 A2 EP0163247 A2 EP 0163247A2
Authority
EP
European Patent Office
Prior art keywords
piston
cylinder
hand
measuring rod
cylindrical element
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.)
Withdrawn
Application number
EP85106246A
Other languages
German (de)
French (fr)
Other versions
EP0163247A3 (en
Inventor
Manfred Dipl.-Ing. Hansen
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
Publication of EP0163247A2 publication Critical patent/EP0163247A2/en
Publication of EP0163247A3 publication Critical patent/EP0163247A3/en
Withdrawn legal-status Critical Current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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/10—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring roll-gap, e.g. pass indicators

Definitions

  • the invention relates to a device for displaying the position of a hydraulic cylinder, in particular as an actuator of a roll adjustment with a piston movable in a cylinder, the surface of which presses directly against the bearing pieces of the rolling mill.
  • the attachment to the cylinder head is also unfavorable, because the position sensor there is strong environmental pollution, i. H. Water vapor, dripping oil and mechanical stress is exposed.
  • the object of the invention is to provide a device of the type mentioned at the outset which enables a highly accurate and reproducible displacement measurement of the piston.
  • the main idea of this embodiment is that the thin tube which is passed through the cylinder base and which is connected to the piston on the other hand absorbs the forces at the sealing point in the cylinder base as well as the frictional forces in this area while the actual measuring rod, which is freely movable within this thin tube, can precisely transmit the movement of the piston without hindrance by external forces.
  • the actual measuring rod 4, which is connected to a measuring device 5, is arranged within the tube 3 and also connected to the piston 2. In this way, the movement of the piston 2 is transmitted directly to the measuring device without longitudinal and transverse forces acting on the measuring rod, so that the highest accuracy can be achieved.

Abstract

The invention relates to a device for indicating the position of a hydraulic cylinder as the actuator for a roll adjustment, with a piston which can be moved in a cylinder, one surface of which presses directly against the bearing pieces of the rolling mill. The object on which the invention is based is to provide a device of the type mentioned at the outset which makes possible highly accurate, reliable and reproducible measurement of the displacement of the piston. For this purpose, it is proposed that that side of the piston (2) which faces the base (1) of the cylinder be connected to a thin tube (3) which is guided through the base (1) of the cylinder in sealed fashion and that provided within this tube (3) there should be a measuring rod (4), which is connected, on the one hand, to the piston (2) and, on the other hand, to a measuring device (5) which indicates its longitudinal movement. <IMAGE>

Description

Die Erfindung betrifft eine Einrichtung zur Anzeige der Stellung eines Hydraulikzylinders insbesondere als Stellglied einer Walzenanstellung mit einem in einem Zylinder beweglichen Kolben, dessen eine Oberfläche direkt gegen die Lagerstücke des Walzwerkes drückt.The invention relates to a device for displaying the position of a hydraulic cylinder, in particular as an actuator of a roll adjustment with a piston movable in a cylinder, the surface of which presses directly against the bearing pieces of the rolling mill.

Bei Anwendung eines Hydraulikzylinders als Stellglied einer Walzenanstellung, entscheiden über den erfolgreichen Einsatz u. a. die Genauigkeit, die Zuverlässigkeit und die Reproduzierbarkeit der Wegmessung des Kolbens.When using a hydraulic cylinder as an actuator of a roll adjustment, decide on the successful use u. a. the accuracy, reliability and reproducibility of the displacement measurement of the piston.

Aus der Praxis sind eine Reihe von Weggeberanordnungen bekannt, teilweise mit sehr komplizierten Ausführungen. Diesen ist gemeinsam, daß man versucht, den normalen Angriffspunkt direkt am Kolben, der die direktteste Anzeige und damit die höchste Genauigkeit liefern würde, zu umgehen, weil diese Kolben einerseits sich in einem mit Hochdruckmedium gefüllten Raum befinden und andererseits mit einer ihrer Oberseiten gegen die Lagerstücke des Walzwerkes drücken, so daß hier eine Anbringung eines Weggebers ausscheidet.A number of displacement sensor arrangements are known in practice, some with very complicated designs. These have in common that one tries to avoid the normal point of attack directly on the piston, which would provide the most direct indication and therefore the highest accuracy, because these pistons are on the one hand in a space filled with high-pressure medium and on the other hand with one of their tops against the Press bearing pieces of the rolling mill so that an attachment of a displacement sensor is ruled out.

Die Anbringung am Zylinderkopf ist ebenfalls ungünstig, weil der Weggeber dort starken Umweltbelastungen, d. h. Wasserdampf, Tropföl und mechanischen Belastungen ausgesetzt ist.The attachment to the cylinder head is also unfavorable, because the position sensor there is strong environmental pollution, i. H. Water vapor, dripping oil and mechanical stress is exposed.

Aufgabe der Erfindung ist es, eine Einrichtung der eingangs genannten Art zu schaffen, die eine höchst genau zuverlässige und reproduzierbare Wegmessung des Kolbens ermöglicht.The object of the invention is to provide a device of the type mentioned at the outset which enables a highly accurate and reproducible displacement measurement of the piston.

Gelöst wird diese Aufgabe erfindungsgemäß durch die im Kennzeichen des Anspruchs angegebenen Merkmale.This object is achieved according to the invention by the features specified in the characterizing part of the claim.

Der wesentliche Gedanke dieser Ausführung ist, daß das dünne Rohr, das durch den Zylinderboden hindurchgeführt ist, und das andererseits mit dem Kolben verbunden ist, die Kräfte an der Dichtstelle im Zylinderboden, wie auch die Reibungskräfte in diesem Bereich aufnimmt, während die eigentliche Meßstange, die innerhalb dieses dünnen Rohres frei beweglich angeordnet ist, die Bewegung des Kolbens ohne Behinderung durch äußere Kräfte genau übertragen kann.The main idea of this embodiment is that the thin tube which is passed through the cylinder base and which is connected to the piston on the other hand absorbs the forces at the sealing point in the cylinder base as well as the frictional forces in this area while the actual measuring rod, which is freely movable within this thin tube, can precisely transmit the movement of the piston without hindrance by external forces.

Die Erfindung ist nachfolgend anhand der Zeichnung erläutert, wobei diese eine schematische Ansicht mit Längsschnitt durch die Kolben/Zylinder-Anordnung zeigt.The invention is explained below with reference to the drawing, which shows a schematic view with a longitudinal section through the piston / cylinder arrangement.

Mit 1 ist der Zylinder bezeichnet, in dem der Kolben 2 geführt ist, der, bezogen auf die Figur, mit seiner oberen Kolbenseite 7 gegen die (nicht dargestellten) Lagerstücke eines Walzwerkes drückt, um entsprechend der Bewegung des Kolbens eine Walzenanstellung zu bewirken. Wiederum bezogen auf die Figur ist an der Kolbenunterseite ein verhältnismäßig dünnes Rohr 3 befestigt, das durch den Boden 8 des Zylinders 1 geführt ist. Die entsprechenden Dichtungen, die ein Herausdrücken der Hydraulikflüssigkeit aus dem Zylinder zwischen dem Zylinderboden und diesem Rohr 3 verhindern, sind mit 6 bezeichnet.1 with the cylinder in which the piston 2 is guided, which, based on the figure, with its upper piston side 7 presses against the bearing pieces (not shown) of a rolling mill in order to effect a roll adjustment in accordance with the movement of the piston. Again, based on the figure, a relatively thin tube 3 is attached to the underside of the piston, which is guided through the bottom 8 of the cylinder 1. The corresponding seals, which prevent the hydraulic fluid from being pressed out of the cylinder between the cylinder base and this tube 3, are designated by 6.

Innerhalb des Rohres 3 und ebenfalls verbunden mit dem Kolben 2 ist die eigentliche Meßstange 4 angeordnet, die mit einer Meßeinrichtung 5 verbunden ist. Die Bewegung des Kolbens 2 wird auf diese Weise, ohne daß Längs- und Querkräfte auf die Meßstange einwirken, direkt auf die Meßeinrichtung übertragen, so daß eine höchste Genauigkeit erzielt werden kann.The actual measuring rod 4, which is connected to a measuring device 5, is arranged within the tube 3 and also connected to the piston 2. In this way, the movement of the piston 2 is transmitted directly to the measuring device without longitudinal and transverse forces acting on the measuring rod, so that the highest accuracy can be achieved.

Claims (1)

Einrichtung zur Anzeige der Stellung eines Hydraulikkolbens als Stellglied einer Walzenanstellung, bei der der in einem Zylinder bewegliche doppelseitig beaufschlagbare Kolben einerseits gegen das Lagerstück des Walzwerkes drückt und andererseits mit einem zylindrischen Element verbunden ist, das abgedichtet durch die dem Lagerstück abgewandte Stirnseite des Zylinders geführt ist und koaxial zu diesem zylindrischen Element eine Meßstange vorgesehen ist, die an ihrem dem Kolben fernen Ende mit einer dessen Längsbewegung erfassenden Meßeinrichtung verbunden ist,
dadurch gekennzeichnet,
daß das zylindrische Element als dünnes Rohr ausgebildet ist, das die unmittelbar mit dem Kolben verbundene Meßstange mit Abstand umgreift.Device for displaying the position of a hydraulic piston as an actuator of a roller adjustment, in which the piston, which can be acted upon on both sides by a double-acting piston, presses on the one hand against the bearing piece of the rolling mill and on the other hand is connected to a cylindrical element which is sealed by the end face of the cylinder facing away from the bearing piece and a measuring rod is provided coaxially with this cylindrical element and is connected at its end remote from the piston to a measuring device which detects its longitudinal movement,
characterized,
that the cylindrical element is designed as a thin tube which surrounds the measuring rod directly connected to the piston at a distance.
EP85106246A 1984-06-01 1985-05-22 Indicating device for roll adjusting Withdrawn EP0163247A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843420501 DE3420501A1 (en) 1984-06-01 1984-06-01 ROLLER CONTROL INDICATOR
DE3420501 1984-06-01

Publications (2)

Publication Number Publication Date
EP0163247A2 true EP0163247A2 (en) 1985-12-04
EP0163247A3 EP0163247A3 (en) 1986-07-23

Family

ID=6237415

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85106246A Withdrawn EP0163247A3 (en) 1984-06-01 1985-05-22 Indicating device for roll adjusting

Country Status (2)

Country Link
EP (1) EP0163247A3 (en)
DE (1) DE3420501A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2645051A1 (en) * 1989-03-28 1990-10-05 Clecim Sa DEVICE FOR DETERMINING THE POSITION OF CYLINDERS OF A ROLLING MILL
EP1001247A2 (en) * 1998-11-09 2000-05-17 Sms Schloemann-Siemag Aktiengesellschaft Position indicator for measuring the setting stroke way of the roll of a rolling frame
DE102007048686A1 (en) 2007-10-10 2009-04-16 Sms Demag Ag Position sensor for Anstellhubwegmessung a piston-cylinder system
EP3150292A1 (en) * 2015-10-02 2017-04-05 Primetals Technologies Austria GmbH Positioning device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3813081A1 (en) * 1988-04-19 1989-11-02 Kahl Amandus Maschf Pan grinder press with a hydraulic device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1927085A1 (en) * 1968-05-29 1969-12-04 Textron Inc Device for regulating the height of the roller gap
US3852984A (en) * 1974-03-06 1974-12-10 Wean United Inc Coarse and vernier roll position system for a rolling mill
DE2431756A1 (en) * 1974-05-31 1976-01-15 Mitsubishi Heavy Ind Ltd ROLLER GAP CONTROL SYSTEM

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB720145A (en) * 1951-06-16 1954-12-15 Onderzoekings Inst Res Improvements in or relating to pressure casting of polyamides or like thermoplastic materials with a short softening zone
US3566638A (en) * 1968-05-29 1971-03-02 Textron Inc Screwdown system for a rolling mill

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1927085A1 (en) * 1968-05-29 1969-12-04 Textron Inc Device for regulating the height of the roller gap
US3852984A (en) * 1974-03-06 1974-12-10 Wean United Inc Coarse and vernier roll position system for a rolling mill
DE2431756A1 (en) * 1974-05-31 1976-01-15 Mitsubishi Heavy Ind Ltd ROLLER GAP CONTROL SYSTEM

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2645051A1 (en) * 1989-03-28 1990-10-05 Clecim Sa DEVICE FOR DETERMINING THE POSITION OF CYLINDERS OF A ROLLING MILL
EP1001247A2 (en) * 1998-11-09 2000-05-17 Sms Schloemann-Siemag Aktiengesellschaft Position indicator for measuring the setting stroke way of the roll of a rolling frame
EP1001247A3 (en) * 1998-11-09 2001-11-21 SMS Demag AG Position indicator for measuring the setting stroke way of the roll of a rolling frame
DE102007048686A1 (en) 2007-10-10 2009-04-16 Sms Demag Ag Position sensor for Anstellhubwegmessung a piston-cylinder system
EP3150292A1 (en) * 2015-10-02 2017-04-05 Primetals Technologies Austria GmbH Positioning device
WO2017055189A1 (en) * 2015-10-02 2017-04-06 Primetals Technologies Austria GmbH Adjustment device
US11110498B2 (en) 2015-10-02 2021-09-07 Primetals Technologies Austria GmbH Adjustment device

Also Published As

Publication number Publication date
DE3420501A1 (en) 1985-12-05
EP0163247A3 (en) 1986-07-23

Similar Documents

Publication Publication Date Title
DE2531857A1 (en) COUPLING FOR OPTICAL FIBERS
EP0163247A2 (en) Indicating device for roll adjusting
DE2445835C2 (en) Measuring gauge, in particular for measuring the inside diameter of bores
EP0184013B1 (en) Method for the measurement of hydrostatic and gas pressure in a sealed bore hole
DE2628400A1 (en) PRESSURE PROBE FOR SOIL EXAMINATIONS
EP1001247B1 (en) Position indicator for measuring the setting stroke way of the roll of a rolling frame
DE4428701A1 (en) Fluid type pressure device with pressure force indicator
DE2904844C3 (en) Pressure measuring device for measuring and monitoring concrete stresses
EP0133871B1 (en) Device to pick up the position of a second point which is variable in relation to a first point
DE2734211C2 (en) Remote display thermometer for high voltage apparatus
DE3515436C2 (en)
DE3125127A1 (en) Working cylinder
EP0301258A1 (en) Method for measuring the flow rate of fluids
DE19618846B4 (en) Cutting ring joint
EP0288588B1 (en) Flow meter
DE3609190C2 (en)
DE3242407A1 (en) Method for measuring the spring force of a helical compression spring which is arranged laterally on a web in a mesh of a grid-shaped spacer for a nuclear reactor fuel element, and barrel gauge for carrying out this method
DE2642309C3 (en) Device for converting a fluidic pressure input signal into a mechanical path
DE3000086C2 (en)
DE2627735C2 (en) Damping device for variable area flowmeters, especially for gaseous media
DE2655071C2 (en) Axial piston machine in drive flange design
DE19725302A1 (en) Piston-cylinder setting device
DE2559133A1 (en) PRESSURE MEASURING DEVICE
DE1943279B2 (en) PRESSURE POINT KNIFE
DE3843293A1 (en) Master cylinder

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

AK Designated contracting states

Designated state(s): BE FR GB IT NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): BE FR GB IT NL SE

17P Request for examination filed

Effective date: 19860825

17Q First examination report despatched

Effective date: 19871125

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19880406

RIN1 Information on inventor provided before grant (corrected)

Inventor name: HANSEN, MANFRED, DIPL.-ING.