EP1013353B1 - Method for controlling a hydraulic rotating and feeding device for a cold pilger mill - Google Patents
Method for controlling a hydraulic rotating and feeding device for a cold pilger mill Download PDFInfo
- Publication number
- EP1013353B1 EP1013353B1 EP99250435A EP99250435A EP1013353B1 EP 1013353 B1 EP1013353 B1 EP 1013353B1 EP 99250435 A EP99250435 A EP 99250435A EP 99250435 A EP99250435 A EP 99250435A EP 1013353 B1 EP1013353 B1 EP 1013353B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hydraulic
- controlling
- feeding
- hydraulic motor
- cold pilger
- 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
Links
- 238000000034 method Methods 0.000 title claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000005096 rolling process Methods 0.000 description 8
- 238000012423 maintenance Methods 0.000 description 3
- 244000089486 Phragmites australis subsp australis Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B21/00—Pilgrim-step tube-rolling, i.e. pilger mills
- B21B21/06—Devices for revolving work between the steps
- B21B21/065—Devices for revolving work between the steps for reciprocating stands
Definitions
- the invention relates to a method for controlling a hydraulic rotary and Feed drive for a cold pilger rolling mill for the production of tubes in one of a crank mechanism in the rolling direction reciprocable rolling stand, whose Rolling tapered calibrated rollers with alternating direction of rotation over the rolling stock and the pipe temporarily for advancement, depending on the position of the crankshaft and rotate, the rotation and advancement of the tube by means of it attacking drive members associated pressure-medium-controlled Hydromotors done.
- Such a procedure is according to the preamble of claim 1 For example, from document DE-A 19 39914 known.
- Object of the present invention is, starting from a known scheme a hydraulic turn and feed drive equipment for a Cold pilger rolling mill, with which the rotary and feed drive reliable, maintenance-friendly and cost-effective can be realized.
- the invention proposes that the Pressure medium supply of each hydraulic motor is controlled by a proportional valve, the depending on the required way of moving of this hydraulic motor Actuator is opened for a time proportional to this way interval.
- the regulation according to the invention is carried out with an easily comprehensible logic Help of simple components.
- the complicated path control is replaced by the specification of a time interval in which a control valve remains open. This will be a cost-effective solution to the pending problem found at the same time low maintenance and no exceptional requirements to the maintenance staff.
- each drive member or hydraulic motor executed movement measured and stored with a Setpoint is compared, and that on the basis of established deviations Time intervals for the valve opening are corrected.
- the proposed regulation is sufficient because of the reliability and accuracy for the operation of a generic cold pilger rolling mill; with a simple one Control loop can be the cold pilger rolling mill without demanding regulation operate. Errors of the plant can be easily located, because the previously complex Distance control of the servo valves is eliminated.
- 1 denotes a hydraulic motor, via the spur gear 2, 3, 4th a sleeve 6 encompassing the tube 5 rotatably drives, in turn, with the chuck 7 is connected.
- the chuck 7 is equipped with jaws 8, which are connected to the Surface of the tube 5 can be applied and this clamp so that at Actuation of the hydraulic motor 1, the introduced via the transmission 2 to 4 torque is transferred to the tube 5.
- FIG. 2 shows the associated control scheme according to the invention.
- the crank angle ⁇ is measured on the crankshaft.
- a start value ⁇ start is specified externally.
- a proportional valve is opened for the time T.
- the chuck 7 is moved with the rotational speed ⁇ via the hydraulic drive 1, resulting in the rotation angle ⁇ ist during the time interval T.
- Proportional to the difference of the desired rotation angle ⁇ soll and the actual rotation angle ⁇ is a correction value .DELTA.T is calculated for the time interval T, in which the valve remains open.
- the correction value ⁇ T for one computing cycle is set to one Adder switched so that the stored value T for the opening time of Proportional valve is changed.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
- Fluid-Pressure Circuits (AREA)
- Crushing And Grinding (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Regeln eines hydraulischen Dreh- und Vorschubantriebes für ein Kaltpilgerwalzwerk zur Herstellung von Rohren in einem von einem Kurbeltrieb in Walzrichtung hin- und herbewegbaren Walzgerüst, dessen verjüngend kalibrierte Walzen mit wechselndem Drehsinn über dem Walzgut abrollen und das Rohr abhängig von der Stellung der Kurbelwelle zeitweise zum Vorschieben und Drehen freigeben, wobei das Drehen und Vorschieben des Rohres mittels den daran angreifenden Antriebsorganen zugeordneter druckmittelgeregelter Hydromotoren erfolgt. Ein derartiges Verfahren ist gemäß dem Oberbegriff von Anspruch 1 beispielsweise aus Dokument DE-A 19 39914 bekannt.The invention relates to a method for controlling a hydraulic rotary and Feed drive for a cold pilger rolling mill for the production of tubes in one of a crank mechanism in the rolling direction reciprocable rolling stand, whose Rolling tapered calibrated rollers with alternating direction of rotation over the rolling stock and the pipe temporarily for advancement, depending on the position of the crankshaft and rotate, the rotation and advancement of the tube by means of it attacking drive members associated pressure-medium-controlled Hydromotors done. Such a procedure is according to the preamble of claim 1 For example, from document DE-A 19 39914 known.
In den 60er Jahren wurden die Bewegungen der Dreh- und Vorschubantriebe für das Rohr bei der Ausübung des Kaltpilgerwalzverfahrens hydromechanisch dargestellt, d.h. die Bewegung der Steuerkolben der Ventile der Hydraulikmotoren wurde durch Kurvenscheiben vorgegeben. Diese mechanisch aufwendige Art der Ventilansteuerung führte zu häufigen Ausfällen; weiterhin traten wegen sehr harter Bremsrampen häufig Rohrleitungsbrüche auf.In the 60s, the movements of the rotary and feed drives for the Tube in the exercise of Kaltpilgerwalzverfahrens shown hydromechanically, i.e. the movement of the control piston of the valves of the hydraulic motors was through Cam discs specified. This mechanically complex type of valve control led to frequent failures; continued to occur because of very hard braking ramps frequently Pipe breaks on.
In den Kaltpilgerwalzwerken der 90er Jahre wurde mit Hilfe einer sehr aufwendigen servohydraulischen Wegregelung die Bewegung der ansonsten rein mechanisch mit Kurvenscheibengetrieben erzeugten Dreh- und Vorschubbewegung nachempfunden. Dieses System arbeitet zuverlässig, weist aber hinsichtlich Herstellkosten und Wartung Nachteile auf. Bei den zum Einsatz kommenden Servoventilen handelt es sich um Spezialfabrikate, die im Schadensfall lange Lieferzeiten haben. Wenn diese Servoventile als Ersatzteile bevorratet werden, müssen sie regelmäßig von Konservierungsmittel gereinigt und neu konserviert werden. In the cold pilgering mills of the 90's was with the help of a very elaborate Servohydraulic travel control the movement of otherwise purely mechanical Cam drives simulated rotary and feed movement. This system works reliably, but has manufacturing costs and maintenance Disadvantages. The servovalves used are: Special brands that have long delivery times in case of damage. If those Servovalves are to be stocked as spare parts, they must be regularly from Preservative cleaned and re-preserved.
Hinzu kommt, daß die aufwendige Wegregelung dazu führt, daß es schwierig ist, Fehler zu lokalisieren. Es sind gut ausgebildete Experten notwendig, die klären, ob es sich um eine Störung in der Servohydraulik, in der Regelung oder der Mechanik handelt. Derartig hoch qualifiziertes Personal ist in vielen Rohrherstellungsbetrieben nicht verfügbar.In addition, the expensive travel control makes it difficult to To locate errors. Well trained experts are needed to clarify if it is a fault in the servo-hydraulic, in the control or in the mechanics is. Such highly qualified personnel are in many tube manufacturing plants not available.
Aufgabe der vorliegenden Erfindung ist es, ausgehend von einer bekannten Regelung eines hydraulischen Dreh- und Vorschubantriebes eine Ausrüstung für ein Kaltpilgerwalzwerk zu schaffen, mit der der Dreh- und Vorschubantrieb zuverlässig, wartungsfreundlich und kostengünstig realisiert werden kann.Object of the present invention is, starting from a known scheme a hydraulic turn and feed drive equipment for a Cold pilger rolling mill, with which the rotary and feed drive reliable, maintenance-friendly and cost-effective can be realized.
Zur Lösung der Aufgabe wird erfindungsgemäß vorgeschlagen, daß die Druckmittelzufuhr jedes Hydromotors über ein Proportionalventil geregelt wird, das abhängig von dem geforderten Weg des von diesem Hydromotor bewegten Antriebsorgans für ein diesen Weg proportionales Zeitintervall geöffnet wird.To solve the problem, the invention proposes that the Pressure medium supply of each hydraulic motor is controlled by a proportional valve, the depending on the required way of moving of this hydraulic motor Actuator is opened for a time proportional to this way interval.
Die erfindungsgemäße Regelung erfolgt mit einer einfach nachvollziehbaren Logik mit Hilfe von einfachen Komponenten. Die komplizierte Wegregelung wird ersetzt, durch die Vorgabe eines Zeitintervalls, indem ein Steuerventil geöffnet bleibt. Damit wird eine kostengünstige Lösung für das anstehende Problem gefunden, die zugleich mit geringem Wartungsaufwand auskommt und keine außergewöhnlichen Anforderungen an das Wartungspersonal stellt.The regulation according to the invention is carried out with an easily comprehensible logic Help of simple components. The complicated path control is replaced by the specification of a time interval in which a control valve remains open. This will be a cost-effective solution to the pending problem found at the same time low maintenance and no exceptional requirements to the maintenance staff.
In einer Ausgestaltung der Erfindung ist vorgesehen, daß die von jedem Antriebsorgan oder Hydromotor ausgeführte Bewegung gemessen und mit einem gespeicherten Sollwert verglichen wird, und daß anhand festgestellter Abweichungen die Zeitintervalle für die Ventilöffnung korrigiert werden.In one embodiment of the invention it is provided that the of each drive member or hydraulic motor executed movement measured and stored with a Setpoint is compared, and that on the basis of established deviations Time intervals for the valve opening are corrected.
Die vorgesehene Regelung ist wegen der Zuverlässigkeit und Genauheit ausreichend für den Betrieb eines gattungsgemäßen Kaltpilgerwalzwerkes; mit einem einfachen Regelkreis läßt sich das Kaltpilgerwalzwerk auch ohne anspruchsvolle Regelung betreiben. Fehler der Anlage lassen sich einfach orten, weil die bislang aufwendige Wegregelung der Servoventile entfällt. The proposed regulation is sufficient because of the reliability and accuracy for the operation of a generic cold pilger rolling mill; with a simple one Control loop can be the cold pilger rolling mill without demanding regulation operate. Errors of the plant can be easily located, because the previously complex Distance control of the servo valves is eliminated.
Die Erfindung wird nachfolgend am Beispiel eines Drehantriebes für das Rohr oder die Dornstange erläutert. Es zeigt:
- Figur 1
- das Schema eines Drehantriebes für das Rohr, und
Figur 2- das zugehörige Regelungsschema.
- FIG. 1
- the scheme of a rotary drive for the pipe, and
- FIG. 2
- the associated control scheme.
In Figur 1 ist mit 1 ein Hydromotor bezeichnet, der über das Stirnradgetriebe 2, 3, 4
eine das Rohr 5 umgreifende Hülse 6 drehantreibt, die ihrerseits mit dem Spannfutter
7 verbunden ist. Das Spannfutter 7 ist mit Klemmbacken 8 ausgerüstet, die an die
Oberfläche des Rohres 5 anlegbar sind und dieses so festklemmen, daß bei
Betätigung des Hydromotors 1 das über das Getriebe 2 bis 4 eingeleitete Drehmoment
auf das Rohr 5 übertragen wird.In Figure 1, 1 denotes a hydraulic motor, via the
In Figur 2 ist das zugehörige erfindungsgemäße Regelungsschema dargestellt.
Der Kurbelwinkel ϕist wird an der Kurbelwelle gemessen. Ein Startwert ϕstart wird extern
fest vorgegeben. Wenn der Kurbelwinkel ϕist größer als der Startwert ϕstart ist, wird ein
Proportionalventil für die Zeit T geöffnet. Infolgedessen wird über den Hydraulikantrieb
1 das Spannfutter 7 mit der Drehgeschwindigkeit ρ bewegt, woraus sich während des
Zeitintervalls T der Drehwinkel ρist ergibt. Proportional zur Differenz von dem
gewünschten Drehwinkel ρsoll und dem tatsächlichen Drehwinkel ρist wird ein
Korrekturwert ΔT für das Zeitintervall T berechnet, in dem das Ventil geöffnet bleibt.FIG. 2 shows the associated control scheme according to the invention. The crank angle φ is measured on the crankshaft. A start value φ start is specified externally. When the crank angle φ is greater than the start value φ start , a proportional valve is opened for the time T. As a result, the
In der Situation ϕist = ϕstart wird der Korrekturwert ΔT für einen Rechenzyklus auf einen Addierer geschaltet, so daß der gespeicherte Wert T für die Öffnungszeit des Proportionalventils verändert wird.In the situation φ actual = φ start, the correction value ΔT for one computing cycle is set to one Adder switched so that the stored value T for the opening time of Proportional valve is changed.
Claims (2)
- Method for controlling a hydraulic rotating and feeding drive unit for a cold pilger mill for the manufacture of pipes in a roller stand which can be moved to and fro by a crank mechanism, the rollers of which are designed to reduce in size and roll in alternating directions over the roll stock and release the pipe at intervals, depending on the position of the crankshaft, for feeding and rotating, the rotation and feeding of the pipe being effected by hydraulic motors which are controlled by a pressure medium and which are allocated to the drive elements acting upon the pipe,
characterised in that
the supply of the pressure medium to each hydraulic motor is controlled by a proportional valve which is opened, in dependence on the required path of the drive element moved by this hydraulic motor, for a time interval which is in proportion with this path. - Method for controlling a hydraulic rotating and feeding drive unit as in Claim 1,
characterised in that
the movement carried out by each drive element or hydraulic motor is measured and compared to a stored reference value, and that the time intervals for the opening of the valve are corrected on the basis of the deviations established.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19860710 | 1998-12-23 | ||
DE19860710A DE19860710A1 (en) | 1998-12-23 | 1998-12-23 | Process for controlling a hydraulic rotary and feed drive for a cold pilger rolling mill |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1013353A2 EP1013353A2 (en) | 2000-06-28 |
EP1013353A3 EP1013353A3 (en) | 2003-10-29 |
EP1013353B1 true EP1013353B1 (en) | 2005-02-09 |
Family
ID=7893117
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99250435A Expired - Lifetime EP1013353B1 (en) | 1998-12-23 | 1999-12-13 | Method for controlling a hydraulic rotating and feeding device for a cold pilger mill |
Country Status (5)
Country | Link |
---|---|
US (1) | US6257040B1 (en) |
EP (1) | EP1013353B1 (en) |
JP (1) | JP2000197906A (en) |
AT (1) | ATE288795T1 (en) |
DE (2) | DE19860710A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8161786B2 (en) * | 2008-04-15 | 2012-04-24 | Glen Stapleton | Apparatus for feeding and turning tube products into a pilger mill machine |
EP2258491A1 (en) * | 2009-06-04 | 2010-12-08 | Siemens Aktiengesellschaft | Rotation tool for a mill train and method for operating a casting-roller compound assembly |
RU2448788C1 (en) * | 2010-11-17 | 2012-04-27 | Открытое акционерное общество Акционерная холдинговая компания "Всероссийский научно-исследовательский и проектно-конструкторский институт металлургического машиностроения имени академика Целикова" (ОАО АХК "ВНИИМЕТМАШ") | Roll mill for rolling tubes with outer lengthwise ribs |
DE102011110939A1 (en) * | 2011-08-17 | 2013-02-21 | Sms Meer Gmbh | Method and device for producing cold pilgered pipes |
DE102012112398B4 (en) * | 2012-12-17 | 2018-05-30 | Sandvik Materials Technology Deutschland Gmbh | Pilger rolling mill with a crank mechanism |
CN107199263A (en) * | 2017-04-27 | 2017-09-26 | 农思宇 | Thin-wall steel tube bending machine |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1939914C3 (en) * | 1969-08-01 | 1973-11-15 | Mannesmann-Meer Ag, 4050 Moenchengladbach | Device for controlling the hydraulic twist and feed drive for pilger mills, especially for cold pilger mills |
US4037444A (en) * | 1977-01-10 | 1977-07-26 | Wean United, Inc. | Shell feed system for a cold pilger mill |
US4562713A (en) * | 1983-12-14 | 1986-01-07 | Sumitomo Metal Industries, Ltd. | Cold pilger mill |
DE4234394C1 (en) * | 1992-10-07 | 1993-11-04 | Mannesmann Ag | FEED TRANSMISSION FOR A COLD PILGRIMAGE ROLLER |
US5921128A (en) * | 1996-12-17 | 1999-07-13 | Mannesmann Aktiengesellschaft | Method and apparatus for cold rolling tubes |
-
1998
- 1998-12-23 DE DE19860710A patent/DE19860710A1/en not_active Withdrawn
-
1999
- 1999-12-13 EP EP99250435A patent/EP1013353B1/en not_active Expired - Lifetime
- 1999-12-13 AT AT99250435T patent/ATE288795T1/en not_active IP Right Cessation
- 1999-12-13 DE DE59911594T patent/DE59911594D1/en not_active Expired - Lifetime
- 1999-12-22 JP JP11363651A patent/JP2000197906A/en active Pending
- 1999-12-23 US US09/471,870 patent/US6257040B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JP2000197906A (en) | 2000-07-18 |
DE19860710A1 (en) | 2000-06-29 |
DE59911594D1 (en) | 2005-03-17 |
US6257040B1 (en) | 2001-07-10 |
ATE288795T1 (en) | 2005-02-15 |
EP1013353A2 (en) | 2000-06-28 |
EP1013353A3 (en) | 2003-10-29 |
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