EP2496364A1 - Beschichtungsverfahren und beschichtungsanlage mit dynamischer anpassung der zerstäuberdrehzahl und der hochspannung - Google Patents
Beschichtungsverfahren und beschichtungsanlage mit dynamischer anpassung der zerstäuberdrehzahl und der hochspannungInfo
- Publication number
- EP2496364A1 EP2496364A1 EP10774142A EP10774142A EP2496364A1 EP 2496364 A1 EP2496364 A1 EP 2496364A1 EP 10774142 A EP10774142 A EP 10774142A EP 10774142 A EP10774142 A EP 10774142A EP 2496364 A1 EP2496364 A1 EP 2496364A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- atomizer
- coating
- component
- coating agent
- painting
- 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.)
- Granted
Links
- 239000011248 coating agent Substances 0.000 title claims abstract description 117
- 238000000576 coating method Methods 0.000 title claims abstract description 81
- 230000006978 adaptation Effects 0.000 title description 27
- 238000010422 painting Methods 0.000 claims abstract description 93
- 239000003973 paint Substances 0.000 claims abstract description 91
- 239000007921 spray Substances 0.000 claims abstract description 35
- 238000007786 electrostatic charging Methods 0.000 claims abstract description 11
- 238000009503 electrostatic coating Methods 0.000 claims description 20
- 230000008859 change Effects 0.000 claims description 19
- 238000007600 charging Methods 0.000 claims description 18
- 238000009434 installation Methods 0.000 claims description 12
- 239000012530 fluid Substances 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000007493 shaping process Methods 0.000 claims description 5
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- 230000008901 benefit Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
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- 238000011960 computer-aided design Methods 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007591 painting process Methods 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Classifications
-
- 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
- B05B12/12—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 responsive to conditions of ambient medium or target, e.g. humidity, temperature position or movement of the target relative to the spray apparatus
- B05B12/126—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 responsive to conditions of ambient medium or target, e.g. humidity, temperature position or movement of the target relative to the spray apparatus responsive to target velocity, e.g. to relative velocity between spray apparatus and target
-
- 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
- B05B12/12—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 responsive to conditions of ambient medium or target, e.g. humidity, temperature position or movement of the target relative to the spray apparatus
- B05B12/122—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 responsive to conditions of ambient medium or target, e.g. humidity, temperature position or movement of the target relative to the spray apparatus responsive to presence or shape of target
-
- 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
- B05B12/12—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 responsive to conditions of ambient medium or target, e.g. humidity, temperature position or movement of the target relative to the spray apparatus
- B05B12/124—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 responsive to conditions of ambient medium or target, e.g. humidity, temperature position or movement of the target relative to the spray apparatus responsive to distance between spray apparatus and target
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
- B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
- B05B5/0422—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces comprising means for controlling speed of rotation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
- B05B5/053—Arrangements for supplying power, e.g. charging power
- B05B5/0531—Power generators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/08—Plant for applying liquids or other fluent materials to objects
- B05B5/10—Arrangements for supplying power, e.g. charging power
-
- 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
- B05B12/082—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 responsive to a condition of the discharged jet or spray, e.g. to jet shape, spray pattern or droplet size
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
- B05B13/0431—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation with spray heads moved by robots or articulated arms, e.g. for applying liquid or other fluent material to 3D-surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
- B05B13/0447—Installation or apparatus for applying liquid or other fluent material to conveyed separate articles
- B05B13/0452—Installation or apparatus for applying liquid or other fluent material to conveyed separate articles the conveyed articles being vehicle bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
- B05B13/0447—Installation or apparatus for applying liquid or other fluent material to conveyed separate articles
- B05B13/0457—Installation or apparatus for applying liquid or other fluent material to conveyed separate articles specially designed for applying liquid or other fluent material to 3D-surfaces of the articles, e.g. by using several moving spray heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B16/00—Spray booths
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
- B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
- B05B5/0403—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces characterised by the rotating member
- B05B5/0407—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces characterised by the rotating member with a spraying edge, e.g. like a cup or a bell
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
- B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
- B05B5/0415—Driving means; Parts thereof, e.g. turbine, shaft, bearings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
- B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
- B05B5/0426—Means for supplying shaping gas
Definitions
- the invention relates to a coating method and a corresponding coating system for coating components with a coating agent, in particular for the coating of motor vehicle body components with a paint.
- the outflow quantity (ie the paint stream) and the guide air flow are changed dynamically in order to obtain an optimum paint sprayer. achieve results. For example, little or no steering air is applied when a large-scale painting is desired, for example, in the coating of large-area components (eg hood, roof surface) of motor vehicle body components. In a detail painting, however, a relatively large Lenkluftstrom is delivered to constrict the spray.
- a disadvantage of the conventional painting is therefore the unsatisfactory flexibility and dynamics in painting.
- the invention is therefore based on the object to provide a correspondingly improved paint shop.
- the invention is based on the technical knowledge that it is advantageous in the operation of a paint shop, if During the movement of the atomizer not only the fluidic operating variables (eg paint flow, steering air flow) are changed dynamically, but also electrical and / or kinematic operating variables, such as the rotational speed of the rotary atomizer or the high voltage with which the coating agent to be applied is charged electrostatically ,
- the dynamic change of the electrical and / or kinematic operating variables such as high voltage and / or rotational speed typically takes place during painting or coating, ie within the coating path predetermined by the program control of the coating system, along which the rotary atomizer usually travels Painting or coating robot is moved over the component surface during application.
- predetermined path points defined by the program control, for example in the teach method or in another manner, for each of which the required (designated as brush) sets of operating quantities can be adjusted and changed according to the surface geometry of the component to be coated.
- the said electrical or kinematic operating variables can thus also be changed at these defined path points. Such changes are also conceivable at other locations related to the defined track points, for example when interpolating between adjacent track points.
- the drive of conventional rotary atomizers usually takes place pneumatically by turbines in which
- the possible braking effect is much lower than the possible acceleration effect. It is therefore very difficult control technology, the turbine to control so that the speed of the rotary atomizer follows a certain speed curve.
- the rotational speed dynamics of the rotary atomizer are influenced by numerous factors, such as the available air pressure to drive the turbine, the mass of the bell cup, which can vary depending on the material used (aluminum, steel or titanium), the diameter of the bell cup, the actual quantity of lacquer to be applied, the viscosity as well as the solids content and the mass of the cup
- Paint shop has held.
- the electrical capacity of the paint shop changes. Almost every system therefore has different electrical capacities that have to be taken up and taken down by the high-voltage cascade.
- the inertia of the electrical operating variables increases with the electrical capacity of the paint shop. A prediction of the behavior of the plant is therefore difficult and a simulation of the painting results therefore also. In the conventional paint shops, therefore, attempts have been made so far to keep the electrical operating variables constant.
- the invention provides for the rotational speed of the rotary atomizer and / or the high voltage of the electrostatic coating agent charge to be adapted dynamically during operation of a coating installation, ie during the movement of the atomizer along the predetermined coating track.
- This is to be distinguished from a virtually static change in the speed or the high voltage between successive Lackiervorticiann.
- the term dynamic change used in the context of the invention is therefore preferably based on the fact that the electrical and / or kinematic operating variable (eg rotational speed, high voltage) is changed within a painting track.
- further operating variables eg guide air flow, paint flow, outflow quantity, robot speed
- further operating variables eg guide air flow, paint flow, outflow quantity, robot speed
- An advantage of the invention is the higher dynamics, which allows a faster painting, which in turn leads to shorter cycle times and thus reduces the unit cost (CPU: Cost per Unit) during painting.
- Another advantage of the invention is the improved coating result or a higher paint quality.
- the dynamic adaptation of electrical operating variables allows a reduction in the number of high-voltage flashovers, resulting in fewer operational disturbances, which in turn causes the so-called first Run rate improves, ie the error rate at the first run of the paint shop.
- the invention advantageously makes it possible to save air and thus to reduce the unit costs (CPU) during painting.
- the dynamics of changing the electrical and / or kinemati see operating size (eg speed, high voltage) and / or the fluidic operating variable (eg paint flow, Lenkluftstrom) of the atomizer is so large that at a setpoint change the response time smaller as 2s, ls, 500ms, 300ms, 150ms, 100ms, 50ms, 30ms
- the set time is the time required for a setpoint change to convert at least 95% of the setpoint change.
- electrical and / or kinematic operating variable preferably depends on the rotational speed of the rotary atomizer and the high voltage of an electrostatic coating agent charge.
- the rotational speed of the rotary atomizer and the high voltage of an electrostatic coating agent charge.
- only the high voltage is changed dynamically while the rotational speed is set in a conventional manner.
- both the rotational speed and the high voltage are changed dynamically.
- an electrical and / or kinematic operating variable used in the context of the invention is not limited to the rotational speed of the rotary atomizer and the high voltage of the electrostatic coating agent charging, but also other re electrical or kinematic operating variables of the atomizer or paint shop includes.
- the electrical current of the electrostatic coating agent charge it is also possible for the electrical current of the electrostatic coating agent charge to be changed dynamically, which is advantageous in particular when the coating agent is charged by means of external charging, ie by means of external electrodes.
- a fluidic operating variable preferably depends on the paint stream and the Lenkluftstrom, wherein in the case of several separate Lenkluftströme they can be dynamically adjusted independently of each other.
- the term of a fluidic operating variable used in the context of the invention is not limited to the steering air flow and the paint flow, but fundamentally also encompasses other fluidic operating variables of the atomizer or the paint shop.
- the main idea of the invention is that the operating variables are no longer kept constant, as in the prior art, by the additional dynamics in the rotational speed and high-voltage control, but that they are highly dynamic in the brush change (previously outflow quantity and steering clearances) for optimum painting
- the interior areas, but also the outdoor areas and detail areas can be parameterized.
- the control by means of painting rules and data fields is so intelligent that it is able to change the correct parameter in an auto- oratory manner in order to adapt optimally to the point to be painted.
- An acceptable quality, highest efficiency and highest coating speed should be achieved. But you can also imagine that the controller should be ranked priorities. Then you could focus on shortest painting time, highest efficiency, lowest Lackiergard, lowest discharge rate, protection of the robot (undynamic possible driving the robot), lowest risk of high voltage risk, best layer thickness distribution, lowest Lackmetsrisiko (runners, cooker), control of the degree of wetness of the paint, color etc., lay.
- a state variable of the coating system is continuously determined during the movement of the atomizer, wherein the state variable can reproduce, for example, the geometry of the component surface at the ink impact point.
- This state variable is then used for the dynamic adaptation of the electrical and / or kinematic operating variable and / or the fluidic operating variable. This means that the change in the electrical and / or kinematic operating variable
- the determination of the state variable can be carried out in the context of the invention, for example by a measurement.
- the state variable of interest it is alternatively also possible for the state variable of interest to be available in any case as a control variable in a control device and then only has to be read out.
- the state variable which is taken into account in the dynamic adaptation of the electrical and / or kinematic operating variable and / or the fluidic operating variable reproduce the geometry of the component at the ink impact point.
- a coating a large area, essentially ner component surfaces a widely fanned spray desirable to achieve a large area performance, so that the shaping air is then switched off expediently.
- a relatively large paint stream can be selected to allow a correspondingly large area performance, the large paint stream can then be applied only with a correspondingly high speed of the rotary atomizer.
- the high voltage can be chosen to be relatively large, since the risk of electrical flashover is then relatively low.
- a relatively strongly constricted spray jet is desirable, so that a relatively large directing air flow is selected.
- the high voltage of the coating agent charging should then be relatively small in order to avoid electrical flashovers.
- the state variable which is taken into account during the dynamic adaptation of the operating variables, indicates whether an interior painting or an exterior painting takes place.
- a strong constricted spray is desirable
- a relatively strong fanned spray is desirable, which leads to correspondingly different demands on the steering air flow.
- interior painting and exterior paint also differ in the requirements of the high voltage of the coating agent charging, since, for example, in an interior at best a relatively small high voltage is possible to avoid flashovers.
- the state variable, which is taken into account in the dynamic adaptation of the operating variables to indicate whether the coating is currently taking place with or without electrostatic charging of the coating agent S '.
- the state variable represents the distance between the color impingement point and an electrical earth point at which the component to be painted is electrically grounded.
- the state variable represents the distance between the color impingement point and an electrical earth point at which the component to be painted is electrically grounded.
- plastic parts such as bumpers
- geometry and dynamics are also of crucial importance, as they are painted partly on electrically grounded components and partly on electrically insulated components, which are, however, fixed with steel mountings.
- the electrical current of the electrostatic coating agent charge is then dissipated via the wet paint to a ground point that is in communication with the device.
- the isolation or proximity to the earth point must be taken into account, so that dynamic adaptation of the high voltage as a function of the distance to the earth point brings advantages.
- the state variable which is taken into account in the dynamic adjustment of the operating variables, indicating whether the respective component is a plastic component or a component made of an electrically conductive material, which to the above leads mentioned advantages.
- the state variable which is taken into account in the dynamic adaptation of the operating variables, indicates whether a detailed painting or surface coating is currently taking place. So insist on one Detail painting on the one hand and, in the case of surface painting, on the other hand, different requirements for paint flow, guide air flow, rotational speed and high voltage of coating agent charging.
- the state variable taken into account in the dynamic adaptation of the operating variables can reflect whether cleaning of the atomizer is currently taking place or whether the atomizer is being used to apply paint.
- cleaning of the atomizer on the one hand and use of the atomizer for the application of paint on the other hand, impose different requirements on paint flow, shaping air flow, rotational speed and high voltage of the coating agent charging.
- the above-mentioned examples of the state variable can also be combined with one another within the scope of the invention.
- the operating variables can be adapted dynamically as a function of a plurality of the state variables mentioned above by way of example.
- an operating quantity e.g., jet width
- the other operating quantities e.g., draft air, paint flow, paint speed, high voltage, speed
- a geometry factor which determines the geometry of the atomizer is continuously determined during the movement of the atomizer Component surface at the color impact point reproduces.
- the spray jet width is then adjusted accordingly, which then in turn leads to a corresponding adaptation of steering air flow, paint flow and / or coating speed (ie movement speed of the atomizer).
- the high voltage on the painting web is changed in an interior painting due to the particular component shape, which automatically leads to a corresponding adjustment of the paint stream (outflow) and the shaping air.
- the adaptation of the parameters or the operating variables taking place in the two examples mentioned above by way of example can be carried out automatically by software or by a control program.
- the control program merely makes a proposal for adaptation, which can then be implemented by a programmer (teacher) or a plant operator.
- the high voltage for the electrostatic coating agent charging is generated by means of a high voltage cascade, wherein a rapid reduction of the high voltage can be made by the high voltage cascade is connected by means of a leakage switch or a ground switch directly or via a bleeder to ground.
- Cascade type high voltage generators for electrostatic coating equipment are well known in the art and have long been common (US 6,381,109, US 4,266,262, etc.) and essentially comprise a multi-stage high voltage cascade connected downstream of a high voltage transformer whose stages consist of diodes and capacitors.
- a particularly expedient option extremely fast, practically delaying Withstand-free changes in the high voltage consists in replacing the diodes of conventional cascades with high-voltage-resistant photodiodes which can be controlled by illumination and by whose light control the cascade and, suitably, each individual cascade stage can be switched on and off to change the high voltage or controlled with respect to its current ,
- the rotary atomizer is driven by an electric motor, such as e.g. from WO 2008/037456 is known per se, to allow a large speed dynamics.
- an electrical dielectric separation can additionally be provided on the rotary atomizer, in order to allow electrostatic coating agent charging despite the electric or hydraulic drive of a rotary atomizer operating at high voltage potential. Possibilities for this are described in the abovementioned WO document.
- the drive of the rotary atomizer is carried out in a largely conventional manner pneumatically by a turbine.
- the turbine can not only accelerate by means of compressed air, but also actively decelerate by means of compressed air in order to achieve the required speed dynamics.
- additional drive or braking medium eg air
- the invention makes it possible for the electrical and / or kinematic operating variables (eg rotational speed, high voltage) of the atomizer to be changed synchronously with the fluidic operating variables (eg steering air flow, paint flow). This means that these different operating variables react synchronously to the setpoint change during a setpoint change.
- the electrical and / or kinematic operating variables eg rotational speed, high voltage
- the fluidic operating variables eg steering air flow, paint flow
- the term of movement of the atomizer used in the context of the invention may have different meanings.
- a meaning of this term provides that the component to be coated stands still while the atomizer is moved over the component surface of the stationary component.
- another meaning of this term is that the atomizer stands still while the component with the component surface to be coated is moved along the atomizer.
- a third meaning of this term provides that both the atomizer and the component to be coated are moved during the coating and thereby perform a relative movement.
- the invention also encompasses a suitably adapted coating system which is suitable for a dynamic adaptation of the electro / kinematic operating variables (for example rotational speed, high voltage).
- FIG. 2 shows a first example of an automatic parameter adaptation in the form of a flow chart
- FIG. 3 shows a second example of an automatic parameter adaptation in the form of a flow chart, as well as FIG
- Figure 4 is a greatly simplified representation of a paint shop according to the invention.
- FIGS. 1A-1C show the method steps according to the invention of a coating method in the form of a flow chart.
- the coating method is used for painting motor vehicle body parts in a paint shop, wherein the painting is carried out by rotary atomizers, which are each guided by a multi-axis painting robot. It should also be mentioned that the process steps described in more detail below are repeated continuously in the painting operation in order to enable a dynamic adaptation of the operating variables of the rotary atomizer.
- a first step S1 it is first determined whether internal painting of an interior of a motor vehicle body component takes place or an exterior painting of exterior surfaces of the motor vehicle body component.
- This distinction is important because, in the case of interior painting on the one hand and exterior painting on the other hand, different requirements apply to the operating variables (eg guide air flow, High voltage) of the rotary atomizer.
- a wide-spread spray makes sense to paint as large as possible can.
- a relatively strong constricted spray jet is desirable in interior lamination in order to be able to paint in more detail.
- a branch to a step S3 or a step S4 then takes place, depending on the type of coating (interior painting or exterior painting).
- the flag IL thus indicates whether interior painting or exterior painting is to be carried out so that the flag IL is then stored for later consideration in the dynamic adjustment of the operating variables (for example guide air flow, paint flow, rotational speed, high voltage) of the rotary atomizer.
- step S5 it is determined in a step S5 whether a detailed painting or a surface coating should take place.
- This distinction is also important because different requirements are placed on the spray jet on the one hand and on surface painting on the other hand. Thus, in a detail painting a strongly constricted spray is desirable, whereas in a surface painting a highly fanned spray is sought, which is associated with correspondingly different demands on the steering air flow.
- a branch to a step S7 or a step S8 then takes place, depending on the type of coating (detailed painting or surface painting).
- the flag DL thus indicates whether a detail painting or a surface painting is carried out so that the flag DL is stored for later consideration in the dynamic adaptation of the operating variables (for example speed, steering air flow, paint flow, high voltage) of the rotary atomizer.
- a next step S9 it is then determined whether the coating is to take place with an electrostatic coating agent charge or without an electrostatic coating agent charge. This distinction is important because a minimum distance to the grounded body component must be maintained in an electrostatic coating agent coating to avoid electrical flashovers. On the other hand, if no electrostatic coating is applied, there is no risk of electrical flashovers, so there are no limitations in positioning the rotary atomizer.
- step S10 is then in response to the activation or deactivation of the electrostatic
- the flag HS thus indicates whether electrostatic coating agent charging takes place or not in the painting operation, so that the flag HS is stored for later consideration in the dynamic adaptation of the operating variables (for example speed, high voltage, directing air flow, paint flow) of the rotary atomizer.
- the flags IL, DL and HS are thus state variables that reflect the current state of the paint shop, whereby these state variables can be adopted, for example, from the system control of the paint shop.
- the desired spray jet width SB is then determined, which is also preprogrammed and can therefore usually be easily read from the associated program memory which controls the painting process.
- the spray jet width SB is the width of a coating path on the component surface, within which the layer thickness amounts to at least 50% of the maximum layer thickness.
- a geometry factor GF is then determined as the state variable, which reproduces the component geometry at the color impingement point.
- the geometric factor GF can, for example, in the plant control are derived from the stored CAD model (CAD: Computer Aided Design) of the motor vehicle body component to be painted, so that no measurements are required to determine the geometry factor.
- a next step S14 the distance A between the ink impingement point on the component to be painted on the one hand and the electrical earth point of the component is then determined on the other hand, wherein the component is electrically grounded at the earth point.
- the electric current is conducted away via the wet paint to the earth point, so that the isolation or the proximity to the earth point should be taken into account at each different color impact point in order to achieve an optimum painting result.
- the drawing speed v of the painting robot is determined, wherein the drawing speed v is the speed at which the painting robot moves the rotary atomizer over the component surface during painting.
- step S16 it is then determined whether the component to be painted is a plastic component or a metal component, so that this distinction can also be taken into account in the dynamic adaptation of the operating variables (for example speed, high voltage, paint current, steering air flow).
- the operating variables for example speed, high voltage, paint current, steering air flow.
- step S17 depending on the type of component to be coated (plastic component or metal component), component) branches to a step S18 or a step S19.
- a step S20 it is determined whether the rotary atomizer is to be cleaned or whether the rotary atomizer applies paint in the normal painting operation.
- a branch takes place to a step S22 or to a step S23.
- FIGS. 1A and 1B therefore show the determination of state variables of the paint shop which should be taken into account in the dynamic consideration of the operating variables (eg rotational speed, high voltage, paint flow, steering air flow) of the rotary atomizer in order to achieve an optimum painting result.
- the figure IC with the steps S24-S28 shows how the operating variables (eg speed, high voltage, Lenkluftstrom, paint flow) of the rotary atomizer depending on the previously determined state variables (eg Geometry factor GF, spray jet width SB, etc.) are dynamically adjusted.
- a definition of the enamel flow QLACK corresponds to a predetermined function f1 as a function of the previously determined state variables IL, DL, HS, A, MA, RB, v, GF and SB.
- the function fl can be stored here in the form of a characteristic field in the system control.
- step S25 the steering air flow QLENKLUFT is then determined according to a function f2 in dependence on the state variables IL, DL, HS, A, MA, RB, v, GF and SB, wherein the function f2 in the form of a characteristic map in the Plant control can be deposited.
- step S26 the high voltage U for the electrostatic coating agent charging according to a function f3 is then set in a similar manner as a function of the previously determined state variables IL, DL, HS, A, MA, RB, v, GF and SB.
- the function f3 can also be stored in the form of a characteristic field in the system control.
- step S27 the rotational speed n of the rotary atomizer is then set according to a function f4 as a function of the previously determined state variables IL, DL, HS, A, MA, RB, v, GF and SB.
- step S28 the rotary atomizer is then driven by the electrical or kinematic operating variables U and n and by the fluidic operating variables QLACK and QLENKLUFT.
- FIGS. 1A-1C show a first example of automatic parameter adaptation by software.
- a geometry factor GF is determined, which reproduces the component geometry at the color impingement point.
- the spray jet width SB is then set as a function of the geometric factor GF in accordance with a predetermined function f1.
- a correspondingly strongly constricted spray jet with a correspondingly small spray jet width SB is desirable.
- a fanned spray with a correspondingly large spray jet width SB is desirable.
- the paint stream QLACK is then determined as a function of the desired spray jet width SB in accordance with a predetermined function f3.
- a correspondingly large paint flow QLACK is required to achieve the desired
- step S5 then provides that the drawing speed v of the painting robot is set as a function of the desired spray jet width SB in accordance with a predetermined function f4.
- a step S6 the rotary atomizer is then driven with the operating variables QLACK / QLENKLUFT thus determined, and the painting robot is moved over the component surface at the optimized drawing speed v.
- the geometric factor GF is determined in order to derive therefrom the optimum spray jet width SB.
- the determination of the spray jet width SB then leads to a corresponding adaptation of the directing air flow QLENKLUFT /
- FIG. 3 shows a second example of an automatic parameter adaptation during painting, wherein the method steps S1-S5 illustrated in FIG. 3 are continuously repeated during the ongoing painting operation during the movement of the rotary atomizer in order to allow a dynamic adaptation of the operating variables of the rotary atomizer.
- a geometry factor GF is determined, which reproduces the component geometry at the color impingement point.
- step S2 the high voltage U for the electrostatic paint charging is then determined as a function of the geometry.
- factor GF determined according to a predetermined function fl.
- the paint flow QLACK is then determined as a function of the geometry factor GF in accordance with a predetermined function f2.
- step S4 the steering air flow QLENKLUFT is also defined as a function of the geometry factor GF in accordance with a predetermined function f3.
- step S5 the rotary atomizer is then driven with the operating variables U, QLACK and QLENKLUFT so adapted.
- the steps S1-S5 described above are continuously repeated during the operation of the spray booth during the movement of the rotary atomizer in order to dynamically adapt the operating variables U, QLACK and QLENKLUFT to the component geometry during the movement of the rotary atomizer, in order to achieve an optimum painting result.
- FIG. 4 shows, in a greatly simplified form, a painting installation according to the invention with a multi-axis painting robot 1, which as an application device guides an electrostatic rotary atomizer 2, as indicated by the dashed block arrow.
- the painting robot is controlled by a robot controller 3, the robot controller 3 specifying the position of the tool center point (TCP) of the painting robot 1 and thereby moving the rotary atomizer 2 to predetermined, programmed painting paths.
- the rotary atomizer 2 is controlled by a control unit 4, as will be described below.
- the rotary atomizer 2 for example, a steering air valve 5, which is controlled by the control unit 4, so that the control unit 4 adjusts the Lenkluftstrom QLENKLUFT, which is discharged from the rotary atomizer 2 for forming the spray.
- the rotary atomizer 2 has a pneumatic turbine 7, which drives a bell cup of the rotary atomizer 2.
- a special feature of the turbine 7 is that the turbine 7 can be pneumatically actively accelerated and braked to allow high speed dynamics.
- the control unit 4 can set an acceleration air flow Q + and a brake air flow Q_ in order to set the desired rotational speed of the rotary atomizer 2.
- EP 1 245 292 B1 already mentioned above.
- the rotary atomizer 2 has a high-voltage electrode 8 in order to electrostatically charge the applied coating agent, which leads to a high degree of application efficiency.
- the high-voltage electrode 8 can optionally be embodied as an inner electrode or as an outer electrode and is supplied by a high-voltage cascade 9 with a specific high voltage U, the high-voltage cascade 9 is also controlled by the control unit 4 in order to achieve the desired high voltage U.
- the high-voltage cascade is connected via a leakage resistor 10 and a leakage switch 11 to ground in order to reduce the high voltage U quickly.
- the diverter switch 11 is also controlled by the control unit 4, so that the high voltage U can be rapidly reduced, if this is desirable in the context of dynamic parameter adjustment.
- the high-voltage cascade can also be controlled in particular with photodiodes provided for this purpose, as has already been explained above.
- the paint shop has a system controller 12, which communicates bidirectionally with the robot controller 3 and the control unit and supplies, for example, state variables of the paint shop to the control unit 4, so that the control unit 4 these state variables in the dynamic adaptation of the steering air flow QLENKLUFT the paint stream QLACK, the acceleration N Trents Kunststoff Q + , the brake air Q and the high voltage U can take into account.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL10774142T PL2496364T3 (pl) | 2009-11-04 | 2010-11-02 | Sposób powlekania i instalacja do powlekania z dynamicznym dopasowaniem prędkości obrotowej rozpylacza i wysokiego napięcia |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE102009051877A DE102009051877A1 (de) | 2009-11-04 | 2009-11-04 | Beschichtungsverfahren und Beschichtungsanlage mit dynamischer Anpassung der Zerstäuberdrehzahl und der Hochspannung |
PCT/EP2010/006681 WO2011054496A1 (de) | 2009-11-04 | 2010-11-02 | Beschichtungsverfahren und beschichtungsanlage mit dynamischer anpassung der zerstäuberdrehzahl und der hochspannung |
Publications (2)
Publication Number | Publication Date |
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EP2496364A1 true EP2496364A1 (de) | 2012-09-12 |
EP2496364B1 EP2496364B1 (de) | 2015-10-28 |
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EP10774142.3A Active EP2496364B1 (de) | 2009-11-04 | 2010-11-02 | Beschichtungsverfahren und beschichtungsanlage mit dynamischer anpassung der zerstäuberdrehzahl und der hochspannung |
Country Status (10)
Country | Link |
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US (1) | US10052644B2 (de) |
EP (1) | EP2496364B1 (de) |
JP (1) | JP5752701B2 (de) |
CN (1) | CN102596422B (de) |
DE (1) | DE102009051877A1 (de) |
ES (1) | ES2559234T3 (de) |
HU (1) | HUE026377T2 (de) |
PL (1) | PL2496364T3 (de) |
PT (1) | PT2496364E (de) |
WO (1) | WO2011054496A1 (de) |
Families Citing this family (7)
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CN104066263A (zh) * | 2013-03-20 | 2014-09-24 | 鸿富锦精密电子(天津)有限公司 | 静电枪 |
DE102013218611A1 (de) * | 2013-09-17 | 2015-03-19 | Peter Schiller | Verfahren und Vorrichtung zur Qualitätssicherung bei Beschichtungsverfahren |
DE102014006651A1 (de) * | 2014-05-07 | 2015-11-12 | Dürr Systems GmbH | Beschichtungsanlage zur Beschichtung von Bauteilen, insbesondere zur Lackierung von Kraftfahrzeugkarosseriebauteilen |
DE102016001073B4 (de) * | 2016-02-02 | 2018-10-25 | Eisenmann Se | Mehrachsroboter sowie Verfahren zu dessen Steuerung bei der Lackierung von Gegenständen |
CN107234014A (zh) * | 2017-07-26 | 2017-10-10 | 廊坊铭捷涂装技术有限公司 | 用于旋杯的具有双层成形空气孔的成形空气罩 |
WO2020198322A1 (en) * | 2019-03-25 | 2020-10-01 | Carlisle Fluid Technologies, Inc. | Electrostatic coating system and method |
EP4214024A1 (de) * | 2020-09-17 | 2023-07-26 | Abb Schweiz Ag | Steuerung für einen farbroboter |
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DE3507965C1 (de) * | 1985-03-06 | 1986-04-03 | Ransburg-Gema AG, St.Gallen | Elektrostatische Spruehpistole fuer Beschichtungsmaterial |
DE4209279C3 (de) * | 1992-03-21 | 2000-09-14 | Cegelec Aeg Anlagen Und Automa | Verfahren und Vorrichtung zum automatischen Beschichten von Gegenständen |
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- 2010-11-02 US US13/508,197 patent/US10052644B2/en active Active
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- 2010-11-02 EP EP10774142.3A patent/EP2496364B1/de active Active
- 2010-11-02 JP JP2012537320A patent/JP5752701B2/ja active Active
- 2010-11-02 WO PCT/EP2010/006681 patent/WO2011054496A1/de active Application Filing
- 2010-11-02 HU HUE10774142A patent/HUE026377T2/en unknown
- 2010-11-02 CN CN201080050179.1A patent/CN102596422B/zh active Active
- 2010-11-02 PT PT107741423T patent/PT2496364E/pt unknown
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Also Published As
Publication number | Publication date |
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JP5752701B2 (ja) | 2015-07-22 |
CN102596422A (zh) | 2012-07-18 |
PL2496364T3 (pl) | 2016-04-29 |
HUE026377T2 (en) | 2016-05-30 |
ES2559234T3 (es) | 2016-02-11 |
WO2011054496A1 (de) | 2011-05-12 |
PT2496364E (pt) | 2016-02-10 |
DE102009051877A1 (de) | 2011-05-05 |
CN102596422B (zh) | 2016-02-24 |
JP2013509991A (ja) | 2013-03-21 |
US20120219700A1 (en) | 2012-08-30 |
US10052644B2 (en) | 2018-08-21 |
EP2496364B1 (de) | 2015-10-28 |
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