EP3046683A1 - Installation d'application et précédé d'application correspondant - Google Patents

Installation d'application et précédé d'application correspondant

Info

Publication number
EP3046683A1
EP3046683A1 EP14758784.4A EP14758784A EP3046683A1 EP 3046683 A1 EP3046683 A1 EP 3046683A1 EP 14758784 A EP14758784 A EP 14758784A EP 3046683 A1 EP3046683 A1 EP 3046683A1
Authority
EP
European Patent Office
Prior art keywords
flow
receptacle
measuring
fluid
cell
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Withdrawn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
EP14758784.4A
Other languages
German (de)
English (en)
Inventor
Manuel STUPP
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.)
Duerr Systems AG
Original Assignee
Duerr Systems 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 Duerr Systems AG filed Critical Duerr Systems AG
Publication of EP3046683A1 publication Critical patent/EP3046683A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B05C11/1002—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves
    • B05C11/1007—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves responsive to condition of liquid or other fluent material
    • B05C11/1013—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves responsive to condition of liquid or other fluent material responsive to flow or pressure of liquid or other fluent material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
    • G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
    • G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
    • G01F25/11—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters using a seal ball or piston in a test loop
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
    • G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
    • G01F25/17—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters using calibrated reservoirs
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F5/00—Measuring a proportion of the volume flow
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00—Control of flow
    • G05D7/06—Control of flow characterised by the use of electric means

Definitions

  • the invention relates to an application system and a speaking application method for applying a fluid (for example PVC: polyvinyl chloride) to a component on a motor vehicle body component).
  • a fluid for example PVC: polyvinyl chloride
  • the material to be applied (eg PVC) is conveyed by a supply of material to an applicator, which applies the fluid to the component.
  • a flow cell is arranged, which may be embodied for example as a spindle measuring cell and corresponding to the funded from the material supply to the applicator fluid idstrom generates a corresponding volume flow signal.
  • the problem here is the fact that the relationship between the output from the flow cell flow signal on the one hand and the actual volume flow on the properties of the pumped fluid depends, which makes a corresponding calibration required.
  • this calibration of the flow cell is done manually by the dispensed from the applicator fluid is dispensed during calibration in a measuring cup, wherein the volume flow signal of the measuring cell is measured. From the known volume of the measuring cup and the measured values of the flow measuring cell, a measurement instruction can then be derived in order to calculate from the output signal of the flow measuring cell the actually conveyed volume flow of the fluid.
  • the disadvantage of this manual calibration method is first the fact that the calibration must be performed by hand, which is prone to errors and is associated with additional effort. In practice, the fluid properties of the fluid also change due to, for example, a change in temperature or a batch change, which actually necessitates recalibration, which does not usually occur. The inadequate calibration therefore often leads in practice to a deviation between the set amount and the actual amount of the applied fluid.
  • the invention is therefore based on the object to improve the calibration accordingly.
  • the invention provides that the calibration of the measurement specification for the flow cell is not done manually, but automatically by a calibration device that is integrated into the application system.
  • the application system according to the invention has, in accordance with the prior art, a flow measuring cell, through which the fluid to be applied flows and generates a measurement signal in accordance with the flow rate of the fluid.
  • the mass flow may be the volume flow or the mass flow of the fluid.
  • a flow measuring cell used in the context of the invention is to be understood generally and not limited to mass flow sensors in which the mass flow to be measured (volume flow or mass flow) flows through the measuring sensor itself. Rather, the term of a flow measuring cell also includes such types of mass flow sensors where the mass flow to be measured flows only through a line, wherein the flow measuring cell measures the flowing through the lines mass flow.
  • an evaluation unit which determines from the measurement signal of the flow cell according to a predetermined measurement specification, the flow rate flowing through the flow measuring cell or through the conduit.
  • the measurement specification of the evaluation unit is therefore intended to reproduce the relationship between the measurement signal of the flow measurement cell on the one hand and the flow rate measured by the flow cell on the other hand.
  • the evaluation unit thus preferably determines the mass flow which flows through the flow measuring cell itself or at least the mass flow which flows directly through the conduit at the flow measuring cell. It should be distinguished in the preferred embodiment of the invention, the flow that flows through a line elsewhere in the application system, for example, immediately before the applicator. Namely, the calibration according to the invention is intended to take account of a change in the measuring behavior of the flow measuring cell and not a change of another component (eg a flexible, breathing tube between the flow measuring cell and the applicator) of the application system.
  • another component eg a flexible, breathing tube between the flow measuring cell and the applicator
  • the evaluation unit has a computing unit which calculates the mass flow according to a predetermined calculation rule from the measurement signal of the flow cell.
  • the evaluation unit can therefore be implemented as hardware or as software in a digital computer.
  • the application system according to the invention now differs from the prior art by an integrated calibration device for automatic calibration of the measurement specification of the evaluation unit.
  • the known from the prior art measuring cup for manual calibration is replaced by a receptacle into which the fluid is dispensed during calibration, wherein the measurement signal of the flow cell is measured as part of the material delivery into the receptacle.
  • the applicator of the invention preferably has an applicator (e.g., nozzle, nebulizer, etc.) to apply the fluid.
  • an applicator e.g., nozzle, nebulizer, etc.
  • the application system according to the invention preferably also comprises, in accordance with the prior art, a material supply for conveying the fluid through the flow measuring cell to the applicator, wherein the material supply usually comprises a pump (for example a metering pump).
  • a material supply for conveying the fluid through the flow measuring cell to the applicator, wherein the material supply usually comprises a pump (for example a metering pump).
  • the application system according to the invention is preferably characterized by a first valve arrangement, which makes it possible to connect the flow measuring cell or the line downstream of the flow measuring cell optionally with the applicator or with the receptacle.
  • the first valve assembly then connects the flow cell downstream of the flow cell to the applicator to apply the fluid via the applicator.
  • the first valve arrangement connects the flow measuring cell or the line downstream behind the flow measuring cell to the receiving container in order to guide the pumped fluid into the receiving container.
  • the calibration device is connected to the flow measuring cell in order to be able to detect the measuring signal of the flow measuring cell during the calibration.
  • the calibration device is connected to the evaluation unit in order to calibrate the evaluation unit of the measurement specification can.
  • the receptacle has a variable receiving volume.
  • a measuring member is additionally provided to measure during the filling of the receptacle with the fluid, the current recording volume.
  • the Kalibriereinrich device is connected on the input side both with the flow measuring cell and with the measuring member in order to take into account the relationship between the measurement signal of the flow cell on the one hand and the actual delivery volume on the other.
  • the Dobe container on a known receiving volume and be completely filled in the calibration with the fluid flowing through the flow measuring cell be the calibration.
  • the calibration determines the measurement specification then depending on the known receiving volume of the receptacle on the one hand and the total volume flow, which was measured by the flow cell.
  • the receiving volume of the receptacle is therefore preferably constant (non-variable). It exists in this variant jedoc also the possibility that the receiving volume of the receptacle is variable, but is kept constant during the calibration process.
  • the application system according to the invention preferably has a fluid pressure regulator, which is arranged between the material supply and the flow measuring cell in order to be able to regulate the fluid pressure.
  • a fluid pressure regulator which is arranged between the material supply and the flow measuring cell in order to be able to regulate the fluid pressure.
  • the fluid pressure upstream of the flow measuring cell can be regulated to a predetermined desired value.
  • the application system according to the invention preferably has an actuator to adjust the receiving volume of the receptacle.
  • the receptacle may be formed as a piston-cylinder arrangement, wherein the piston position of the receptacle determines the receiving volume.
  • the drive of the piston for example, pneumatically done, but also another type of drive is possible, such as an electric motor drive.
  • the piston can be moved continuously during filling of the receiving container, wherein a piston position sensor continuously measures the current level. From the output signal of the piston position sensor on the one hand and the measuring signal of the flow measuring cell, the measuring instructions can then be derived within the scope of the calibration.
  • the application system according to the invention preferably comprises a second valve arrangement for connecting the receptacle to the material supply.
  • the application system according to the invention preferably comprises a third valve arrangement, which between the
  • Flow measuring cell and the first valve arrangement is arranged.
  • the actuator for adjusting the receiving volume of the receiving container preferably has a compressed air source and a fourth valve arrangement, wherein the fourth valve arrangement controls the compressed air flow from the compressed air source to the receptacle.
  • the compressed air source may displace a piston of a piston-and-cylinder arrangement so that the fluid in the cylinder (receptacle) is pushed out of the cylinder.
  • the flow rate measured by the flow measuring cell is preferably a volume flow and thus represents the delivery volume per unit time.
  • the flow rate measured by the flow measuring cell is a mass flow, which thus represents the delivered mass per unit time.
  • the first valve arrangement between the flow measuring cell and the applicator is preferably a 5/2-way valve.
  • the invention is not limited to the invention described above Application equipment. Rather, the invention also claims protection for a corresponding application method in which the measurement specification for determining the flow rate from the measurement signal of the flow measuring cell is automatically calibrated.
  • the receptacle has a variable receiving volume and is filled during calibration with the fluid flowing through the flow measuring cell.
  • the variable receiving volume of the receptacle is preferably continuously measured, i. the current level of the receptacle.
  • the flow through the flow cell during filling of the receptacle is measured during calibration. The measurement specification can then be determined, for example, in the form of a characteristic curve from the measured filling level (receiving volume) of the receiving container on the one hand and the measuring signal of the flow measuring cell.
  • the vibrator container in another variant of the invention, the vibrbe container, however, completely filled with a known cinnamon, in which case the measuring signal of the flow cell is then measured after filling the Frebetude.
  • the known receiving volume of the receptacle on the one hand and the measurement signal of the flow cell can also be derived as the measurement rule, which reproduces the relationship between the measurement signal of the flow cell and the actual flow rate.
  • This variant of the invention allows a waiver of an additional measuring element to measure the current level of sacredb container.
  • the fluid flow from the material supply during calibration is completely inserted into the receptacle. directs, so that the application of the fluid through the applicator is then interrupted during the calibration.
  • the receptacle is preferably completely emptied prior to filling in the calibration, this emptying can for example be done pneumatically.
  • the calibration of the measuring instructions can be time-controlled in each case at specific time intervals.
  • the calibration can be carried out at intervals of one hour, one day or one week.
  • the calibration is started manually, for example, when the fluid is changed.
  • the application system applied polyvinyl chloride (PVC).
  • PVC polyvinyl chloride
  • the inventive principle of an automatic calibration is also suitable for the application of other fluids, such as adhesives (one-component adhesives or
  • Figure 1 is a schematic representation of an application system according to the invention with an integrated calibration device, and
  • FIG. 1 shows in schematic form an embodiment of an application system according to the invention with a material supply 1, a material pressure regulator 2, a flow measuring cell 3, a controllable valve 4, a 5/2-ege- valve 5 and finally an applicator 6.
  • the material supply 1 promotes the fluid to be applied (eg PVC) through the material pressure regulator 2, the flow cell 3, the valve 4 and the 5/2-way valve 5 to the applicator 6, which then applies the fluid to a component (eg motor vehicle body component).
  • a component eg motor vehicle body component
  • the flow measuring cell 3 measures the volume flow conveyed from the material supply 1 to the applicator 6 and outputs a corresponding electrical measurement signal to an evaluation unit 7.
  • the evaluation unit 7 then calculates the actual volume flow from the electrical measurement signal of the flow measuring cell 3 in accordance with a predetermined measurement specification.
  • the assignment between the electrical measuring signal of the flow measuring cell 3 on the one hand and the resulting volume flow on the other hand is predetermined by a calibration device 8 in the form of a characteristic curve.
  • the 5/2-way valve 5 redirects the fluid flow from the material supply 1 into a receptacle 9, wherein a measuring element 10 measures the current fill level of the receptacle 9 and forwards a corresponding measurement signal to the calibrating device 8.
  • the calibration device 8 thus obtains pairs of values from the electrical measurement signal of the flow measurement cell 3 in accordance with the measured volume flow on the one hand and the measurement signal measured by the measurement element 10 in accordance with the current acquisition volume of the receptacle 9 on the other hand. From these pairs of values, the calibration device 8 calculates a characteristic which is then stored in the evaluation unit 7 as a measurement instruction and during normal application operation determines the calculation of the volume flow from the measurement signal of the flow measurement cell 3.
  • the application system according to the invention has a compressed air source 11, which is connected via a valve 12 to the receptacle 9 and allows emptying of the receptacle 9.
  • the receptacle 9 is formed as a piston-cylinder arrangement, wherein the piston position of the piston in the receptacle 9 reflects the current receiving volume.
  • the valve 12 When the valve 12 is opened, compressed air flows into the receptacle 9 and displaces therein a piston, so that the fluid contained in the receptacle 9 is pushed out of the receptacle 9.
  • the receptacle 9 is connected via a valve 13 with the material supply. This connection makes it possible to push the fluid accumulated in the receptacle 9 during calibration back into the material supply 1, which enables reuse of this fluid.
  • the invention also includes a control unit 14, which controls the calibration device 8, the valves 4, 12, 13 and the 5/2-way valve.
  • the control unit 14 can perform an automatic calibration of the evaluation unit 7 in this way. The carrying out of these calibrations can take place, for example, at specific time intervals or between the coating of two successive components. In addition, the calibration can also be started manually, if necessary.
  • the receptacle 9 is completely filled during calibration, so that the known maximum receiving volume of the receptacle 9 then in conjunction with the flow cell 3 measured by the flow rate the functional relationship between the measurement signal of the flow cell. 3 on the one hand and the resulting volume flow on the other.
  • the receptacle 9 is continuously filled during calibration, wherein the measuring member 10 continuously measures the current recording volume. In this way, a multiplicity of value pairs can be measured, which allows a more accurate calibration.
  • a first step Sl the receptacle 9 is first emptied into the material supply 1.
  • the valves 12, 13 are controlled by the control unit 14 so that they open.
  • the compressed air source 11 then controls the piston in the receptacle 9 so that the fluid contained in the receptacle 9 is pushed out of the receptacle 9.
  • the fluid pushed out of the receptacle 9 is then pressed back into the material supply 1 via the valve 13.
  • a fluid pressure is then established between the material supply 1 and the applicator 6.
  • valves 12 and 13 are closed. Furthermore, the valve 4 between the flow cell 3 and the 5/2-way valve is closed to allow the pressure build-up.
  • the filling container 9 is then filled via the opened valve 4 and the 5/2-way valve 5 in a step S3.
  • the flow measuring cell 3 continuously measures the volume flow and outputs a corresponding electrical measuring signal to the calibrating device 8.
  • the calibration device 8 determines in a step S4 a characteristic curve from the value pairs of the electrical measuring signal of the flow measuring cell 3 on the one hand and the measuring signal of the measuring element 10 on the other hand.
  • This characteristic curve is then stored as a measurement instruction in a step S5 in the evaluation unit 7 and serves during the normal application operation to calculate the volume flow from the electrical measurement signal of the flow measurement cell 3.
  • the invention is not limited to the preferred embodiment described above. Rather, a variety of variants and modifications are possible, which also make use of the concept of the invention and therefore fall within the scope.
  • the invention also claims protection of the subject matter and the features of the subclaims independently of the claims referred to.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

L'invention concerne une installation d'application et un précédé d'application servant à appliquer un fluide (par exemple, du chlorure de polyvinyle, de la colle, du vernis, des lubrifiants, de la cire de conservateurs, un moyen d'étanchéité ou de la mousse de polyuréthanne) sur un composant (par exemple un composant de carrosserie de véhicule automobile). L'installation comporte une cellule (3) de mesure de débit servant à mesurer un débit massique du fluide et à générer un signal de mesure correspondant au débit massique mesuré, et une unité d'évaluation (7) servant à déterminer le débit massique en fonction d'une instruction de mesure provenant du signal de mesure de la cellule de mesure de débit (3). L'invention concerne en outre un dispositif d'étalonnage (8) servant à étalonner automatiquement l'instruction de mesure de l'unité d'évaluation (7).
EP14758784.4A 2013-09-16 2014-09-01 Installation d'application et précédé d'application correspondant Withdrawn EP3046683A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013015313.1A DE102013015313A1 (de) 2013-09-16 2013-09-16 Applikationsanlage und entsprechendes Applikationsverfahren
PCT/EP2014/002358 WO2015036096A1 (fr) 2013-09-16 2014-09-01 Installation d'application et précédé d'application correspondant

Publications (1)

Publication Number Publication Date
EP3046683A1 true EP3046683A1 (fr) 2016-07-27

Family

ID=51485548

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14758784.4A Withdrawn EP3046683A1 (fr) 2013-09-16 2014-09-01 Installation d'application et précédé d'application correspondant

Country Status (8)

Country Link
US (1) US10076766B2 (fr)
EP (1) EP3046683A1 (fr)
CN (1) CN105555419B (fr)
BR (1) BR112016004645B1 (fr)
DE (1) DE102013015313A1 (fr)
MX (1) MX2016003366A (fr)
RU (1) RU2665482C2 (fr)
WO (1) WO2015036096A1 (fr)

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CN105555419B (zh) 2018-01-26
MX2016003366A (es) 2016-06-06
BR112016004645B1 (pt) 2021-04-27
RU2016114533A (ru) 2017-10-23
WO2015036096A1 (fr) 2015-03-19
US10076766B2 (en) 2018-09-18
DE102013015313A1 (de) 2015-03-19
CN105555419A (zh) 2016-05-04
US20160221024A1 (en) 2016-08-04
RU2665482C2 (ru) 2018-08-30

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