EP4076770A1 - Dispositif permettant d'appliquer un matériau visqueux sur des pièces à usiner - Google Patents

Dispositif permettant d'appliquer un matériau visqueux sur des pièces à usiner

Info

Publication number
EP4076770A1
EP4076770A1 EP21702674.9A EP21702674A EP4076770A1 EP 4076770 A1 EP4076770 A1 EP 4076770A1 EP 21702674 A EP21702674 A EP 21702674A EP 4076770 A1 EP4076770 A1 EP 4076770A1
Authority
EP
European Patent Office
Prior art keywords
measuring element
valve
piston
plunger
axis
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
Application number
EP21702674.9A
Other languages
German (de)
English (en)
Other versions
EP4076770B1 (fr
Inventor
Heiko Bitzel
Bastian Prinz
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.)
Atlas Copco IAS GmbH
Original Assignee
Atlas Copco IAS 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 Atlas Copco IAS GmbH filed Critical Atlas Copco IAS GmbH
Publication of EP4076770A1 publication Critical patent/EP4076770A1/fr
Application granted granted Critical
Publication of EP4076770B1 publication Critical patent/EP4076770B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • B05C5/0225—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 characterised by flow controlling means, e.g. valves, located proximate the outlet
    • B05C5/0237—Fluid actuated valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/14—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening
    • B05B1/16—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening having selectively- effective outlets
    • B05B1/1609—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening having selectively- effective outlets with a selecting mechanism comprising a lift valve
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B05B1/3033—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head
    • B05B1/304—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve
    • B05B1/3046—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice
    • B05B1/306—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice the actuating means being a fluid
    • 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
    • B05B13/0421—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 rotating spray heads
    • 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
    • B05C5/027—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated
    • B05C5/0275—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated flow controlled, e.g. by a valve
    • B05C5/0279—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated flow controlled, e.g. by a valve independently, e.g. individually, flow controlled
    • 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
    • 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
    • B05C5/0225—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 characterised by flow controlling means, e.g. valves, located proximate the outlet

Definitions

  • the invention relates to a device for applying viscous material to workpieces according to the preamble of claim 1.
  • Such devices are used to apply viscous materials such as adhesives, sealants or paints to workpieces. Often several nozzles of different geometries mounted on the rotating lance are used, into each of which a material outlet opens.
  • a needle valve is assigned to each material outlet, the valve needle of which closes or releases the relevant material outlet on a valve seat.
  • Cylinders are provided for actuating the valve needles, each valve needle being connected to the piston of a cylinder which is moved by being pressurized by a fluid, in particular compressed air.
  • the cylinders are arranged next to one another at the same distance from the valve seats, and the device is controlled in such a way that only one of the needle valves opens for material application.
  • the invention is based on the idea of allowing all pistons to act on a common measuring element by means of the tappets, the position of which can then be detected by the sensor.
  • the cylinders of which are arranged next to one another, in particular in the sense that their cross-sections do not overlap perpendicular to the axis of rotation, with, for example, the lower and / or upper boundary surfaces of the piston chambers each being arranged in one plane.
  • the rotary lance it is also possible for the rotary lance to have only one needle valve with a cylinder, in particular arranged eccentrically with respect to a central longitudinal axis.
  • the measuring element can be designed to be rotationally symmetrical, at least with regard to its parts acting on the sensor, so that its interaction with the sensor of the holding device does not change or does not change significantly even when the rotary lance is rotated with respect to the holding device.
  • the axis of rotation is also expediently a central longitudinal axis of the rotary lance or of the measuring element.
  • the at least one piston is preferably acted upon by means of compressed air and, as a fail-safe function, also expediently has a spring action which urges it into a position in which the valve needle sits sealingly on the associated valve seat.
  • the measuring element can be designed in different configurations. However, it is preferred that it has a permanent magnet while the sensor is a magnetic sensor. It is preferred that the permanent magnet has the shape of a circular ring that revolves around the axis of rotation, so that a rotation of the rotary lance with respect to the holding device does not result in any change in the interaction of the permanent magnet with the magnetic sensor. In particular, the permanent magnet is axially polarized so that its poles follow one another in the axial direction. In order to save on expensive magnetic material, it is preferred that the radius of the circular ring is at least 5 times, preferably at least 8 times as large as its thickness measured in the radial direction.
  • the measuring element expediently has a holding plate which can be acted upon by the plunger and to which the permanent magnet is fastened.
  • the rotary lance preferably has a housing made of non-ferromagnetic material, in which the at least one cylinder and the measuring element are accommodated.
  • a particularly suitable material for the housing is aluminum, which hardly hampers the detection of the permanent magnet by means of the magnetic sensor.
  • the measuring element is expediently displaceable against a restoring force in the direction away from at least one cylinder, so that the restoring force the
  • the restoring force is expediently applied by at least one compression spring which is arranged between the measuring element and a housing cover that delimits the housing at the top.
  • the at least one compression spring can be designed as a helical spring.
  • each guide pin extending in the longitudinal direction, each guide pin extending through the measuring element.
  • a guide pin is arranged in the middle, so that the axis of rotation extends through it, while further guide pins can be arranged off-center.
  • at least one of the guide pins runs centrally through one of the compression springs.
  • the cylinders are arranged at the same distances from one another and at the same distances from the axis of rotation in order to achieve the greatest possible symmetry.
  • each plunger is eccentrically connected to the respective piston and is arranged closer to the axis of rotation than the longitudinal center axis of the piston, a torque exerted by the plunger on the measuring element is reduced, so that the risk of the measuring element jamming in the housing is further reduced.
  • each of the compression springs is assigned a further compression spring which counteracts it with a weaker restoring force and presses against the measuring element from below.
  • the further compression springs can also advantageously be designed as helical springs and arranged around the guide pins. The forces of the restoring springs and the further restoring springs then still result in a restoring force urging the measuring element into its starting position.
  • the provision of the further return springs helps to prevent the measuring element from tilting in the housing.
  • FIG. 1 shows a device for applying viscous material in a perspective view
  • FIG. 2a, 2b show a part of the device according to FIG. 1 in a sectional side view and in a perspective view.
  • the device 10 shown in the drawing is used to apply viscous material to workpieces, in the present exemplary embodiment, to apply paint.
  • the application device 10 has a holding device 12, which is intended for mounting on a robot arm.
  • a rotary lance 14 is mounted in the holding device 12 and is rotatable with respect to the holding device 12 about an axis of rotation extending in a longitudinal direction 16.
  • the rotary lance 14 has at its lower end three material outlets 18 at which viscous material for application to a workpiece can exit from a housing 20 of the rotary lance 14 made of aluminum and at which an application nozzle is usually mounted.
  • Each needle valve 22 is accommodated in the housing 20, each needle valve 22 being assigned to one of the material outlets 18.
  • the valve needles 24 of the needle valves 22 each close one of the material outlets 18 on a valve seat or release the material outlet 18 by lifting it off the valve seat.
  • Each of the needle valves is assigned a double-acting pneumatic cylinder 26, in the piston chamber 28 of which a piston 30 can be moved back and forth in the longitudinal direction 16, to which the relevant valve needle 24, which also extends in the longitudinal direction 16, is firmly connected.
  • a movement of the piston 30 by means of pressurized air thus results in a movement of the valve needle 24 and in an opening or closing of the relevant material outlet 18 on the valve seat.
  • a closing spring 32 arranged in the piston chamber 28 and designed as a helical spring presses the respective piston 30 downwards and the valve needle 24 onto the associated valve seat, so that the material outlets 18 are always closed if the compressed air fails.
  • the device 10 is controlled in such a way that only one material outlet 18 is opened at a time.
  • the holding device 12 has a permanently mounted magnetic sensor 34. This detects the position of a movable measuring element 36 in the housing 20 of the rotary lance 14.
  • the measuring element 36 has a holding plate 38 which can be moved back and forth in the longitudinal direction 16 in the housing 20 and an annular permanent magnet 40 firmly connected to the holding plate 38.
  • the holding plate 38 is guided on a central guide pin 42 and on three outer guide pins 44, each of the guide pins 42, 44 extending through an opening in the holding plate 38 extends.
  • a compression spring 48, 50 which is supported on a housing cover 46 at the top and on the holding plate 38 at the bottom and presses the measuring element 36 downward is arranged around each of the guide pins 42, 44. These are a central compression spring 48 arranged around the central guide pin 42 and three outer compression springs 50 each arranged around one of the outer guide pins 44 The upper side of the piston chamber 28 in question facing the measuring element 36 is led out and rests against the holding plate 38. If one of the material outlets 18 is opened by lifting the relevant piston 30, the plunger 52 connected to this piston 30 pushes the measuring element 46 upwards so that the magnetic sensor 34 can detect the movement of the permanent magnet 40. The magnetic sensor 34 then generates a “valve open” signal. If the material outlet 18 is closed again by lowering the relevant piston 30, the compression springs 48, 50 lower the measuring element 36, which is detected by the magnetic sensor 34, which generates a signal “valves closed”.
  • the cylinders 26 are arranged next to one another in the sense that their cross-sections made perpendicular to the longitudinal direction 16 do not overlap. A loading of the measuring element 36 by means of the plunger 52 can therefore not take place centrally, i.e. in the middle of the holding plate 38.
  • the plungers 52 are arranged eccentrically on the piston 30 and as far as possible in the direction offset to the center of the holding plate 38 or in the direction of the central longitudinal axis of the rotary lance 14.
  • a further, weaker compression spring 48 ', 50' which presses against the holding plate 38 from below.
  • the compression springs 48, 50 and the further compression springs 48 ', 50' are dimensioned in such a way that each pair consisting of one of the compression springs 48, 50 and the opposite further compression spring 48 ', 50' exerts a total force on the holding plate 38 , which is directed downward, that is, in the direction of the cylinder 26.
  • the rotary lance 14 has three needle valves 22. It goes without saying that the rotary lance 14 can be equipped with one, two or more than three needle valves 22.
  • the invention relates to a device 10 for applying viscous material to workpieces with a rotary lance 14 which is rotatably arranged in a holding device 12 about an axis of rotation running in a longitudinal direction 16 and which has at least one material outlet 18, with each material outlet 18 having a needle valve 22 is assigned, by means of which valve needle 24 extending in the longitudinal direction 16, the respective material outlet 18 can be closed on a valve seat, and each valve needle 24 is assigned a cylinder 26, in the piston chamber 28 of which a piston 30 is movable by being pressurized by a fluid, with which the valve needle 24 is firmly connected.
  • a tappet 52 is connected to each piston 30 and is located on the valve seat facing away from the at least one valve seat
  • the top is sealed out of the relevant piston chamber 28, that the rotary lance 14 has a measuring element 36 that can be acted upon by means of the plunger 52 and is displaceable in the longitudinal direction 16, and that the holding device 12 has a sensor 34 for determining the position of the measuring element 36.

Landscapes

  • Engineering & Computer Science (AREA)
  • Robotics (AREA)
  • Coating Apparatus (AREA)

Abstract

La présente invention concerne un dispositif (10) pour appliquer un matériau visqueux sur des pièces à usiner, comprenant une lance rotative (14) disposée dans un appareil de support (12) de manière à se mettre en rotation autour d'un axe de rotation s'étendant dans une direction longitudinale (16), la lance ayant au moins une sortie de matériau (18), un robinet à pointeau (22) étant associé à chaque sortie de matériau (18), le pointeau (24) du robinet s'étendant dans le sens de la longueur (16) étant utilisé pour fermer chaque sortie de matériau (18) sur un siège de robinet ; et chaque pointeau de robinet (24) présentant un cylindre (26) associé, dans la chambre de piston (28) duquel un piston (30) peut être déplacé par pression exercée au moyen d'un fluide, le pointeau de robinet (24) étant raccordé de façon permanente au piston. Selon la présente invention : un poussoir (52) est raccordé à chaque piston (30), le poussoir, à son extrémité supérieure opposée à l'au moins un siège de robinet, étant guidé de manière étanche hors de la chambre de piston associée (28) ; la lance rotative (14) comporte un élément de mesure (36) qui peut être sollicité par le poussoir (52) et déplacé dans la direction longitudinale (16) ; et l'appareil de support (12) comporte un capteur (34) pour déterminer la position de l'élément de mesure (36).
EP21702674.9A 2020-02-05 2021-02-01 Dispositif permettant d'appliquer un matériau visqueux sur des pièces à usiner Active EP4076770B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020102871.7A DE102020102871A1 (de) 2020-02-05 2020-02-05 Vorrichtung zum Auftragen von viskosem Material auf Werkstücke
PCT/EP2021/052329 WO2021156210A1 (fr) 2020-02-05 2021-02-01 Dispositif permettant d'appliquer un matériau visqueux sur des pièces à usiner

Publications (2)

Publication Number Publication Date
EP4076770A1 true EP4076770A1 (fr) 2022-10-26
EP4076770B1 EP4076770B1 (fr) 2024-01-03

Family

ID=74494929

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21702674.9A Active EP4076770B1 (fr) 2020-02-05 2021-02-01 Dispositif permettant d'appliquer un matériau visqueux sur des pièces à usiner

Country Status (6)

Country Link
US (1) US20230026219A1 (fr)
EP (1) EP4076770B1 (fr)
KR (1) KR20220129017A (fr)
CN (1) CN115038526A (fr)
DE (1) DE102020102871A1 (fr)
WO (1) WO2021156210A1 (fr)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4842162A (en) 1987-03-27 1989-06-27 Nordson Corporation Apparatus and method for dispensing fluid materials using position-dependent velocity feedback
DE8904972U1 (de) * 1988-04-20 1990-01-11 Lenhardt Maschinenbau GmbH, 7531 Neuhausen Vorrichtung zum Abgeben hochviskoser, pastöser, kompressibler Substanzen
US4944243A (en) 1989-06-21 1990-07-31 Taise Corporation Apparatus for automatically painting external wall of building
DE9321430U1 (de) * 1993-12-14 1998-01-22 Robert Bosch Gmbh, 70469 Stuttgart Elektromagnetisch betätigbares Druckregelventil
DE10345840A1 (de) * 2003-09-30 2005-04-14 Sca Schucker Gmbh & Co. Kg Vorrichtung zum Auftragen eines Fluids
US8534505B2 (en) * 2008-09-15 2013-09-17 Nordson Corporation Liquid material dispenser
DE102012012360A1 (de) 2012-06-22 2013-12-24 Sca Schucker Gmbh & Co. Kg Vorrichtung zum Auftragen einer pastösen Masse
EP3466221B1 (fr) * 2016-05-26 2021-06-30 Mycronic AB Procédé et dispositif de commande de distribution de jet par mesure de déplacement
JP6739786B2 (ja) * 2016-05-30 2020-08-12 武蔵エンジニアリング株式会社 液体材料吐出装置、その塗布装置および塗布方法
DE102016013723A1 (de) * 2016-11-17 2018-05-17 Atlas Copco Ias Gmbh Vorrichtung zum Auftragen eines viskosen Materials
DE102018104835A1 (de) * 2018-03-02 2019-09-05 Atlas Copco Ias Gmbh Vorrichtung zum Auftragen eines viskosen Materials auf Werkstücke

Also Published As

Publication number Publication date
CN115038526A (zh) 2022-09-09
WO2021156210A1 (fr) 2021-08-12
DE102020102871A1 (de) 2021-08-05
EP4076770B1 (fr) 2024-01-03
US20230026219A1 (en) 2023-01-26
KR20220129017A (ko) 2022-09-22

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