DE102006052350B4 - Device for controlling hydraulic presses by quasi-continuous measurement of the pressure - Google Patents
Device for controlling hydraulic presses by quasi-continuous measurement of the pressure Download PDFInfo
- Publication number
- DE102006052350B4 DE102006052350B4 DE102006052350.4A DE102006052350A DE102006052350B4 DE 102006052350 B4 DE102006052350 B4 DE 102006052350B4 DE 102006052350 A DE102006052350 A DE 102006052350A DE 102006052350 B4 DE102006052350 B4 DE 102006052350B4
- Authority
- DE
- Germany
- Prior art keywords
- hydraulic presses
- controlling hydraulic
- presses according
- operating parameters
- switching mechanism
- 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 - Fee Related
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
- B30B11/007—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a plurality of pressing members working in different directions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
- B30B11/005—Control arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/16—Control arrangements for fluid-driven presses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/28—Arrangements for preventing distortion of, or damage to, presses or parts thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
- F15B19/005—Fault detection or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/63—Electronic controllers
- F15B2211/6303—Electronic controllers using input signals
- F15B2211/6343—Electronic controllers using input signals representing a temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/63—Electronic controllers
- F15B2211/6303—Electronic controllers using input signals
- F15B2211/6346—Electronic controllers using input signals representing a state of input means, e.g. joystick position
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
Vorrichtung zur Steuerung von Hydraulikpressen durch quasi-kontinuierliche Messung des Druckes, wobei ein einziger, in den Hydraulikkreis eingebundener Druckgeber (1), ein elektrisches Ausgangssignal abgibt, das durch einen Analog-Digitalwandler (2) in zeitlicher und amplitudenmäßiger Auflösung digitalisiert oder durch wenigstens einen Komparator mit mehreren unterschiedlichen Schwellenhöhen, differenziert die Steuerung eines Schaltwerkes (3) übernimmt.Device for controlling hydraulic presses by quasi-continuous measurement of the pressure, whereby a single pressure transducer (1) integrated into the hydraulic circuit emits an electrical output signal that is digitized by an analog-digital converter (2) in temporal and amplitude-related resolution or by at least one Comparator with several different threshold heights, differentiated the control of a switching mechanism (3) takes over.
Description
Nachfolgend wird eine Vorrichtung beschrieben, die es unter ausschließlicher Verwendung eines einzigen Drucksensors gestattet, die vollständige Steuerung einer Hydraulikpresse zu übernehmen.Hereinafter, a device will be described, which allows using only a single pressure sensor to take full control of a hydraulic press.
Eine hydraulische Presse besteht im Allgemeinen aus mehreren, typischerweise drei, Zylindern. Der Füllzylinder (
Ein Schaltwerk (
Die erforderlichen Steuersignale zur Fortschaltung des Schaltwerkes werden üblicherweise durch Sensoren (Endlageschalter) an den Hydraulikzylindern abgegeben. Diese Endlageschalter sind störanfällig, weil insbesondere Stäube des Pressmaterials in sie eindringen und die Kontaktgabe mit zunehmender Betriebsdauer verschlechtern. Auch bauen sich an den Steuernocken der Hydraulikzylinder Pfropfen oder Kuchen auf, die die Schaltpunkte verschieben. Letzteres gilt auch, wenn statt mechanischer Schalter z. B. induktive Näherungsschalter eingesetzt sind.The necessary control signals for switching the switching mechanism are usually emitted by sensors (limit switches) on the hydraulic cylinders. These limit switches are susceptible to interference, because in particular dusts of the press material penetrate into them and worsen the contact with increasing operating time. Also build on the control cams of the hydraulic cylinder graft or cake that move the switching points. The latter also applies if instead of mechanical switch z. B. inductive proximity switches are used.
Erfindungsgemäß wird an Stelle dieser Sensoren rsp. Schalter eine Vorrichtung zur Steuerung von Hydraulikpressen durch quasi-kontinuierliche Messung des Druckes gemäß allen Merkmalen im Patentanspruch 1 vorgeschlagen. Durch den Einsatz einer solchen Druckmessung im Hydrauliksystem können alle vorgenannten Schalter/Sensoren entfallen bzw. eingespart werden. Damit entfällt auch deren Einbau, die Verkabelung, ihre Justage und folglich auch ihr möglicher Ausfall.According to the invention instead of these sensors rsp. Switch a device for controlling hydraulic presses by quasi-continuous measurement of the pressure according to all features proposed in
Dazu wird ein einziger, geeigneter Drucksensor (
Das Schaltwerk wertet die aktuelle Ventilstellung und Drucksituation aus und leitet daraus seine nächste Aktion ab.The derailleur evaluates the current valve position and pressure situation and derives its next action.
Die quasi-kontinuierliche Messung des Druckes hat ihre Ursache in der Verwendung von Analog-Digitalwandlern, die eine endliche Wandlungszeit benötigen. Bei Verwendung hinreichend schnell wandelnder Konverter, kann die geringe zeitliche Verzögerung gegen den sonst behäbigen Bewegungsablauf der Hydraulikzylinder vernachlässigt werden. Unter diesen Umständen darf von einer kontinuierlichen Messung gesprochen werden.The quasi-continuous measurement of pressure is due to the use of analog-to-digital converters that require a finite conversion time. When using sufficiently fast converter, the small time delay against the otherwise slow motion sequence of the hydraulic cylinder can be neglected. Under these circumstances, one may speak of a continuous measurement.
Das Schaltwerk (
So können beispielsweise über eine Schnittstelle (
Zur Störungserkennung lassen sich einfache Algorithmen ersinnen: Das Ausbleiben von Druckspitzen über längere Zeit markiert einen Totalausfall im Hydraulikkreis (Leckage). Ein schneller Druckaufbau während der Pressphase zeugt vom verstopften Presskanal und kann durch Öffnen des Klemmzylinders behoben werden. Kein oder geringer Druck während des Pressens bedeuten Presslinge unzureichender Festigkeit bzw. Qualität. Kurze aufeinanderfolgende Druckspitzen in der Bewegung des Füllzylinders weisen auf Probleme im Bereich der Materialzufuhr hin.To detect malfunctions, simple algorithms can be devised: the absence of pressure peaks for a long time marks a total failure in the hydraulic circuit (leakage). A rapid pressure build-up during the pressing phase is a sign of the clogged pressure channel and can be remedied by opening the clamping cylinder. No or low pressure during pressing means compacts of insufficient strength or quality. Short successive pressure peaks in the movement of the filling cylinder indicate problems in the area of the material supply.
Zusätzlich lassen sich auch externe Betriebsparameter wie Öltemperatur, Ölpumpentemperatur oder Probleme mit dem Austrag der Presslinge (Ausschubbahn) überwachen.In addition, external operating parameters such as oil temperature, oil pump temperature or problems with discharge of the pellets (discharge path) can also be monitored.
Auch kann der Materialfuß kontrolliert und statistisch erfaßt werden: Die verpreßte Materialmenge läßt sich aus der Summe der Füllhübe oder aber der Zahl der Presslinge ermitteln. Alle Werte lassen sich zu beliebigen Zeiten, stündlich, täglich und/oder absolut usf. bestimmen und dokumentieren.Also, the material foot can be controlled and statistically recorded: The compressed amount of material can be determined from the sum of Füllhübe or the number of compacts. All values can be determined and documented at any time, hourly, daily and / or absolute, and so on.
Schließlich läßt sich die Betriebsdauer der Presse zuverlässig bestimmen. So können Wartungs- bzw. Serviceintervalle genauestens angegeben, kontrolliert und eingehalten werden.Finally, the service life of the press can be reliably determined. Maintenance and service intervals can be precisely specified, monitored and adhered to.
Claims (15)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006052350.4A DE102006052350B4 (en) | 2006-11-07 | 2006-11-07 | Device for controlling hydraulic presses by quasi-continuous measurement of the pressure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006052350.4A DE102006052350B4 (en) | 2006-11-07 | 2006-11-07 | Device for controlling hydraulic presses by quasi-continuous measurement of the pressure |
Publications (2)
Publication Number | Publication Date |
---|---|
DE102006052350A1 DE102006052350A1 (en) | 2008-05-08 |
DE102006052350B4 true DE102006052350B4 (en) | 2014-11-20 |
Family
ID=39264920
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102006052350.4A Expired - Fee Related DE102006052350B4 (en) | 2006-11-07 | 2006-11-07 | Device for controlling hydraulic presses by quasi-continuous measurement of the pressure |
Country Status (1)
Country | Link |
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DE (1) | DE102006052350B4 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008027682B4 (en) * | 2008-06-10 | 2011-03-17 | Eduard Heidt | Method for producing thin-walled and high-strength components |
CN110043534B (en) * | 2019-04-29 | 2020-06-23 | 兰州理工大学 | Visual experiment device and method for bubble flowing and bubble removal in hydraulic system |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3636863A (en) * | 1969-08-21 | 1972-01-25 | Int Petents & Dev Corp | Arrangement for compacting refuse |
US4651273A (en) * | 1984-02-03 | 1987-03-17 | L. Schuler Gmbh | Pressure control installation for presses |
DE19629065A1 (en) * | 1995-08-01 | 1997-02-06 | Hoerbiger Gmbh | Hydraulic drive for vehicle folding roof |
DE10044660A1 (en) * | 2000-09-02 | 2002-03-14 | Hein Stefan | Arrangement for compressing waste has oscillating pressure surface in compression chamber opposite rotating cutting surface, movable pressure surface opposite blocking surface |
DE10258660A1 (en) * | 2002-12-13 | 2004-07-15 | Metso Lindemann Gmbh | Method and arrangement for monitoring the operating status of presses, in particular packaging presses |
DE10391685B4 (en) * | 2002-03-21 | 2006-04-20 | Metso Lindemann Gmbh | Press for editing material of any kind |
-
2006
- 2006-11-07 DE DE102006052350.4A patent/DE102006052350B4/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3636863A (en) * | 1969-08-21 | 1972-01-25 | Int Petents & Dev Corp | Arrangement for compacting refuse |
US4651273A (en) * | 1984-02-03 | 1987-03-17 | L. Schuler Gmbh | Pressure control installation for presses |
DE19629065A1 (en) * | 1995-08-01 | 1997-02-06 | Hoerbiger Gmbh | Hydraulic drive for vehicle folding roof |
DE10044660A1 (en) * | 2000-09-02 | 2002-03-14 | Hein Stefan | Arrangement for compressing waste has oscillating pressure surface in compression chamber opposite rotating cutting surface, movable pressure surface opposite blocking surface |
DE10391685B4 (en) * | 2002-03-21 | 2006-04-20 | Metso Lindemann Gmbh | Press for editing material of any kind |
DE10258660A1 (en) * | 2002-12-13 | 2004-07-15 | Metso Lindemann Gmbh | Method and arrangement for monitoring the operating status of presses, in particular packaging presses |
Also Published As
Publication number | Publication date |
---|---|
DE102006052350A1 (en) | 2008-05-08 |
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8122 | Nonbinding interest in granting licences declared | ||
8101 | Request for examination as to novelty | ||
8110 | Request for examination paragraph 44 | ||
8105 | Search report available | ||
R016 | Response to examination communication | ||
R079 | Amendment of ipc main class |
Free format text: PREVIOUS MAIN CLASS: B30B0015100000 Ipc: B30B0015160000 |
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R079 | Amendment of ipc main class |
Free format text: PREVIOUS MAIN CLASS: B30B0015100000 Ipc: B30B0015160000 Effective date: 20140711 |
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R018 | Grant decision by examination section/examining division | ||
R020 | Patent grant now final | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |