EP1037726A1 - Dispositif pour surveiller un liquide de traitement - Google Patents

Dispositif pour surveiller un liquide de traitement

Info

Publication number
EP1037726A1
EP1037726A1 EP98966297A EP98966297A EP1037726A1 EP 1037726 A1 EP1037726 A1 EP 1037726A1 EP 98966297 A EP98966297 A EP 98966297A EP 98966297 A EP98966297 A EP 98966297A EP 1037726 A1 EP1037726 A1 EP 1037726A1
Authority
EP
European Patent Office
Prior art keywords
processing liquid
monitoring
processing
sensor
determination
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Withdrawn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
EP98966297A
Other languages
German (de)
English (en)
Inventor
Karl-Günter BREMER
Thomas HÖFLER
Peter Holzhauer
Thomas Netsch
Eckehard Walitza
Norbert Stroh
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.)
Mann and Hummel GmbH
Original Assignee
Filterwerk Mann and Hummel GmbH
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 Filterwerk Mann and Hummel GmbH filed Critical Filterwerk Mann and Hummel GmbH
Publication of EP1037726A1 publication Critical patent/EP1037726A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/18—Water
    • G01N33/1826—Organic contamination in water
    • G01N33/1833—Oil in water
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/10—Arrangements for cooling or lubricating tools or work
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/26—Oils; Viscous liquids; Paints; Inks
    • G01N33/28—Oils, i.e. hydrocarbon liquids
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/20—Controlling water pollution; Waste water treatment
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T436/00—Chemistry: analytical and immunological testing
    • Y10T436/12—Condition responsive control
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T436/00—Chemistry: analytical and immunological testing
    • Y10T436/20—Oxygen containing
    • Y10T436/207497—Molecular oxygen
    • Y10T436/209163—Dissolved or trace oxygen or oxygen content of a sealed environment

Definitions

  • the invention relates to a device for monitoring a machining fluid.
  • a method for monitoring a machining fluid is known from US Pat. No. 5,224,051. This method is used in particular on a metal processing system, a large number of metal processing machines being provided and a centrally stored reservoir which contains the amount of aqueous cooling lubricant liquid. The metal processing machines are supplied centrally from this reservoir.
  • the cooling lubricant liquid consists of lubricant and water-containing components. These components are monitored and measurement signals are generated which are sent to an analysis device. Based on the analysis, the content of a component in the monitored liquid is modified.
  • the method described in the cited patent shows a device with which the content of dissolved oxygen is determined as an indication of microorganisms.
  • the conductivity, the pH value and the temperature are also determined.
  • no information is given on the correlation between oxygen consumption and microorganism contamination.
  • a disadvantage of this system is that the reliable assignment of the measurement data to the components of the processing fluid is not possible. It is therefore very difficult to add additional components or modify the processing fluid.
  • a disadvantage of this known device is that certain parameters in the liquid are very difficult to detect. So z. B. the determination of the microorganisms contained in the liquid is often only possible indirectly. There is also a risk that due to solids and chemically dissolved substances in the processing liquid, the measurement signal is falsified or the functionality of the sensor is impaired.
  • the invention has for its object to provide a device for monitoring a machining fluid that is suitable, even under difficult conditions, ie. H. Detect several components in the liquid, even with machining liquids that are contaminated with solids and chemically contaminated.
  • the main advantage of the invention is that a device for maintaining the functionality of the sensor or sensors is initially provided. Meaningful measured values can only be determined if the sensor properties are continuously analyzed. The measured values arrive at a device for processing the monitoring signals in order to influence the composition of the processing liquid directly or indirectly from these processed signals.
  • This device ensures optimum stabilization of the processing fluid and thus ensures a long service life for this fluid.
  • a PT 100 sensor is suitable for temperature measurement.
  • the concentration of the processing liquid can be determined from the combination of the refractive index with the density or the UV haze with the density.
  • Foreign oil can also be determined using a combination of refractive index and density or turbidity and density.
  • Aerobic germs can be determined using a corresponding O 2 sensor.
  • the pH value is usually sensed with a PH electrode, the conductivity with a Conductivity sensor.
  • the corrosiveness of the machining fluid can be determined with a redox electrode.
  • composition of the processing fluid is influenced, for example, by predetermined control algorithms using an expert system or by means of neural networks. It is of course also conceivable to use fuzzy logic which carries out an optimization process with regard to the quality of the processing fluid.
  • the processing liquid is expediently monitored in a treatment tank.
  • This monitoring can, for. B. by a mobile service device, which is suitable for field use.
  • a mobile service device which is suitable for field use.
  • different device variants are conceivable, such as. B. a semi-mobile device that supplies the determined data to a remote diagnosis.
  • the processing liquid is monitored in one or more processing containers. It is also possible to arrange containers in the bypass of a processing container in order to ensure particularly favorable environmental conditions there.
  • sensors can be used which sense the loading of the processing liquid with solid particles. It is also expedient to measure the microorganisms, the pH or the corrosivity or other relevant variables such as germs, yeasts, bacteria, abrasiveness, nitrate, nitrite, water hardness, disruptive ions, dispersed air, foam, foreign oil, foreign substances, temperature, conductivity to determine in the machining fluid.
  • a further development of the invention aims to carry out remote data transmission; Monitoring signals are sent to one or more devices for evaluation via these, for example via a corresponding modem; Integrated data evaluation is also possible.
  • a filter system for mechanical cleaning is provided in an advantageous embodiment of the invention.
  • This filter system consists, for example, of a belt filter system or a vacuum filter as well as other suitable systems / devices and peripheral devices. If the processing liquid has to be separated into certain components, for example for disposal, a system can be provided in a further embodiment of the invention, which performs, for example, an emulsion splitting.
  • Such systems usually work on a membrane basis (ultrafiltrate), but also on a thermal or chemical basis.
  • An important component in the device for monitoring machining fluid is the detection of an aerobic attack. This correlates with the oxygen consumption in the machining fluid.
  • the oxygen consumption caused by aerobic germs is directly related to the bacterial count (microbiologically expressed in column-forming units per milliliter).
  • the oxygen consumption is temperature-dependent. It is therefore useful to determine the correlation between oxygen consumption, bacterial count and temperature.
  • the oxygen consumption can only be determined in a closed system. It is therefore necessary to supply the processing liquid separately to a sample container and to carry out the measurement of the oxygen consumption there.
  • FIG. 1 shows a processing plant for processing liquid
  • Figure 2 shows an integrated system concept for monitoring and processing the
  • FIG. 3 shows the schematic representation of the sensors for recording the data of a processing liquid.
  • the preparation system according to FIG. 1 shows several machine tools 10, 11, 12, 13 in a schematic representation. Machining liquid, in particular a cooling lubricant emulsion, is fed to these machine tools via line 14.
  • Machining liquid in particular a cooling lubricant emulsion
  • the cooling lubricant emulsion which is loaded with solids or dirt particles and other contaminants, reaches an emulsion preparation 16 via line 15 Filter system 19 the removal of very fine particles from the emulsion.
  • the cleaned and prepared emulsion arrives in a collecting tank 20 and is again available for the processing process.
  • the cooling lubricant emulsion is transported via feed pumps, not shown here.
  • FIG. 2 shows a device for monitoring the processing liquid.
  • the machine tools 10, 11, 12, 13 are to be supplied with prepared emulsion via the line 14.
  • the contaminated emulsion is fed via line 15 to the emulsion preparation and emulsion care 16.
  • the processed emulsion is available in a tank 20.
  • measured variables are now determined using suitable sensors. This is one or the following of the following parameters: temperature, pH, concentration, conductivity, corrosiveness, corrosion protection, foreign oil, solid particles, foreign substances, microorganisms, germs, yeasts, bacteria, abrasiveness, nitrate, nitrite, water hardness, disturbing Ions, dispersed air, foam chloride.
  • other measured variables can also be determined using suitable sensors.
  • This diagnosis system has the task of analyzing the condition of the coolant medium by comparing the actual values with predefined target values, recognizing trends with regard to the course of the actual values and possibly possible Control strategies developed. Of course, an evaluation of the measured variables is also possible on site.
  • interventions in the emulsion for emulsion preparation or for emulsion maintenance take place directly or via remote data transmission.
  • the interventions can also be carried out manually, ie certain components of the emulsion are changed by visual monitoring of the data. So will for example, the emulsion is cleaned according to its degree of contamination by a filter system 21. 22 foreign oil is removed from the emulsion via a corresponding system. Another filter system 23 is able to remove very fine particles from the emulsion.
  • a system 24 for reducing the microorganisms is also controlled via the diagnostic system 30. The pH value is adjusted or regulated via a system 25.
  • the corrosivity can be changed via a system 26, the temperature via a suitable device 27 and the concentration of the emulsion, ie the ratio between water and oil is controlled via a system 28. Further process steps can also be carried out, the possibility with the block box 40 is indicated in FIG.
  • the processing of the cooling lubricant emulsion is also independent of the type of machining process on the machine tools. It is irrelevant whether the machine tools carry out a uniform or different machining process, the emulsion is only monitored and optimized according to its properties. Also in machining processes such as wire drawing, cold rolling, forming manufacturing processes.
  • the measurement variables can be diagnosed automatically.
  • the entire device for monitoring the processing liquid can have a device 31 for filter cake dewatering or for grinding sludge oil removal as an additional system.
  • the solid fraction from this device is fed to a chip washing system via a line 32 or a conveyor device.
  • the de-oiled chips go to a corresponding collecting device or to a recycling plant.
  • the liquid fraction from the filter cake dewatering or from the chip washing system passes via lines 33, 34 to a device 35 for emulsion splitting.
  • the waste emulsion from the tank 20 can be fed to this device via the line 36.
  • the emulsion cleavage carries out a separation between oil and water, the oil passes via a line 37 to a treatment plant, not shown here.
  • the water can can be returned via line 38 to tank 20.
  • Fresh water or emulsion concentrate can additionally be supplied to the tank via a line 39.
  • Sensors arranged in the tank 30 are provided with one or more suitable devices which maintain the functionality of the sensors. This can be a washing device, a corresponding cleaning device or the like. The sensors are calibrated at regular intervals, ie the diagnostic system 30 checks and corrects the sensor-specific signals.
  • a partial flow from a container 20 with processing liquid reaches the temperature sensor via a valve 50.
  • a density measurement is then carried out with the sensor 52 and the conductivity is measured with the sensor 53.
  • a sensor 54 is provided to determine the turbidity.
  • the sensor 55 is a redox transmitter for determining the corrosion behavior.
  • valves 59, 60, 61 there are three valves 59, 60, 61 in the circuit.
  • the valves 59, 60 are closed and the valve 61 is open.
  • valve 61 is closed and valves 59, 60 are opened.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Pathology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Mechanical Engineering (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
  • Lubricants (AREA)
  • Apparatus Associated With Microorganisms And Enzymes (AREA)

Abstract

L'invention concerne un dispositif permettant de surveiller un liquide de traitement, qui comprend un détecteur pour produire au moins un signal de surveillance. Il est également prévu un dispositif servant à détecter, mémoriser et maintenir la fiabilité de fonctionnement du détecteur et un dispositif destiné à traiter le signal de surveillance et à produire un signal pour influer indirectement ou directement sur la composition du liquide de traitement, ainsi que des actionneurs pour convertir des critères et des valeurs théoriques prédéterminés.
EP98966297A 1997-12-13 1998-12-11 Dispositif pour surveiller un liquide de traitement Withdrawn EP1037726A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19755477 1997-12-13
DE19755477A DE19755477A1 (de) 1997-12-13 1997-12-13 Einrichtung zur Überwachung einer Bearbeitungsflüssigkeit
PCT/EP1998/008077 WO1999030869A1 (fr) 1997-12-13 1998-12-11 Dispositif pour surveiller un liquide de traitement

Publications (1)

Publication Number Publication Date
EP1037726A1 true EP1037726A1 (fr) 2000-09-27

Family

ID=7851815

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98966297A Withdrawn EP1037726A1 (fr) 1997-12-13 1998-12-11 Dispositif pour surveiller un liquide de traitement

Country Status (4)

Country Link
US (1) US6555379B1 (fr)
EP (1) EP1037726A1 (fr)
DE (1) DE19755477A1 (fr)
WO (1) WO1999030869A1 (fr)

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DE102007038603A1 (de) * 2007-08-16 2009-02-19 Volkswagen Ag Vorrichtung und Verfahren zum Analysieren und Dosieren von Kühlschmierstoff-Emulsion
DE102010028319A1 (de) * 2010-04-28 2011-11-03 Zf Friedrichshafen Ag Verfahren und Vorrichtung zur Steuerung der Konzentration wassergemischter Kühlschmierstoffe
DE102010035228A1 (de) * 2010-08-24 2012-03-01 Technotrans Ag Kühlschmiermittelzuführeinrichtung
JP6309936B2 (ja) 2015-11-17 2018-04-11 ファナック株式会社 クーラント監視機能を有する制御装置
GB2547056B (en) * 2016-04-04 2018-03-28 Jemtech Uk Ltd A system for determining the condition of a fluid in a tank, an apparatus including the system and a method for managing the condition of the fluid
JP7395105B2 (ja) * 2018-03-28 2023-12-11 株式会社山本金属製作所 冷却液良否管理システム及び冷却液良否検出ユニット
CN109822392A (zh) * 2019-02-22 2019-05-31 合肥齐泰光电科技有限公司 用于光机电一体机的流量分配系统
FI131645B1 (fi) * 2021-03-19 2025-08-19 Spesnes Oy Laite ja menetelmä prosessinesteen käsittelemiseksi
WO2023121511A1 (fr) * 2021-12-21 2023-06-29 Общество с ограниченной ответственностью "Центр эффективных производственных решений" Station automatique de surveillance et de correction de paramètres de liquide de lubrification-refroidissement
US11951578B1 (en) * 2022-12-02 2024-04-09 National Kaohsiung University Of Science And Technology Cutting fluid digital monitoring management system and method

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Also Published As

Publication number Publication date
WO1999030869A1 (fr) 1999-06-24
DE19755477A1 (de) 1999-06-17
US6555379B1 (en) 2003-04-29

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