EP3789516A1 - Kaltgasspritzanlage mit einstellbarem partikelstrahl - Google Patents

Kaltgasspritzanlage mit einstellbarem partikelstrahl Download PDF

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Publication number
EP3789516A1
EP3789516A1 EP19196216.6A EP19196216A EP3789516A1 EP 3789516 A1 EP3789516 A1 EP 3789516A1 EP 19196216 A EP19196216 A EP 19196216A EP 3789516 A1 EP3789516 A1 EP 3789516A1
Authority
EP
European Patent Office
Prior art keywords
particle
cold gas
spray system
gas spray
nozzle
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Withdrawn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
EP19196216.6A
Other languages
German (de)
English (en)
French (fr)
Inventor
Axel Arndt
Aline Creuz
Jens Dahl Jensen
Ursus KRÜGER
Uwe Pyritz
Oliver Stier
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Priority to EP19196216.6A priority Critical patent/EP3789516A1/de
Priority to EP20764022.8A priority patent/EP3990681B1/de
Priority to PCT/EP2020/072771 priority patent/WO2021047855A1/de
Priority to CN202080062693.0A priority patent/CN114375350A/zh
Priority to US17/641,623 priority patent/US20220347702A1/en
Publication of EP3789516A1 publication Critical patent/EP3789516A1/de
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C24/00—Coating starting from inorganic powder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1404—Arrangements for supplying particulate 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
    • B05B12/14—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1404—Arrangements for supplying particulate material
    • B05B7/1468—Arrangements for supplying particulate material the means for supplying particulate material comprising a recirculation loop
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/02—Coating starting from inorganic powder by application of pressure only
    • C23C24/04—Impact or kinetic deposition of particles
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/16—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed
    • B05B7/1606—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed the spraying of the material involving the use of an atomising fluid, e.g. air
    • B05B7/1613—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed the spraying of the material involving the use of an atomising fluid, e.g. air comprising means for heating the atomising fluid before mixing with the material to be sprayed
    • B05B7/162—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed the spraying of the material involving the use of an atomising fluid, e.g. air comprising means for heating the atomising fluid before mixing with the material to be sprayed and heat being transferred from the atomising fluid to the material to be sprayed
    • B05B7/1626—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed the spraying of the material involving the use of an atomising fluid, e.g. air comprising means for heating the atomising fluid before mixing with the material to be sprayed and heat being transferred from the atomising fluid to the material to be sprayed at the moment of mixing

Definitions

  • the invention relates to a cold gas spray system for generating an adjustable particle jet and a method for controlling such a cold gas spray system.
  • Cold spraying is a process in which a material in powder form is applied to a carrier material (substrate) at very high speed.
  • a process gas e.g. nitrogen
  • a Laval nozzle e.g. a very high speed
  • i. H. Supersonic speed e.g. a very high speed
  • the injected powder particles are accelerated to such a high speed that, in contrast to other thermal spraying processes, they form a dense and firmly adhering layer when they hit the substrate, even without prior melting or melting.
  • Powder conveyors are also referred to below as feed devices and are used to feed a flow of particles (powder flow).
  • the quality of the built-up material depends to a large extent on uniform delivery. In other words, the system should generate (spray) a particle beam that is as uniform as possible.
  • the object is achieved by a cold gas spray system as specified in claim 1.
  • the cold gas spray system for generating an adjustable particle jet has a nozzle for this purpose, the particle beam emerging from the nozzle when the cold gas spray system is in operation.
  • the particle beam comprises particles that are to be deposited on the substrate to be coated and a propellant gas.
  • the cold gas spray system also has a feed device for feeding a particle stream to the nozzle.
  • the particle flow is a flow of powder particles that is made available to the nozzle and is accelerated to supersonic speed in the nozzle.
  • the particle flow accordingly has a speed well below the speed of sound.
  • the particle flow is designed as a particle-gas mixture and it is a two-phase flow of conveying gas with solid particles in it.
  • the cold gas spray system also has one or more actuators, the actuators being designed in such a way that the particle flow and / or the particle beam can be temporarily reduced during ongoing operation.
  • the particle flow and / or the jet can also be interrupted for a short time.
  • the actuators can be controlled in such a way that at times no or at least only a few particles emerge from the nozzle. This can be used advantageously to create complex structures by means of the cold gas spraying process.
  • This has the big one
  • the advantage is that powder that is not used to build up a structure is not consumed in idle mode, but rather the particle flow is only interrupted and powder can be saved.
  • the temporary interruption or reduction have a maximum duration of a few seconds, e.g. B. until a blank space in a three-dimensional structure has been passed by the nozzle.
  • the interruption is preferably a maximum of 1 second, in particular a maximum of 0.5 seconds.
  • At least one of the actuators is connected downstream of the feed device. This can be implemented in such a way that the actuator is arranged in such a way that the feed device can no longer feed a particle stream to the nozzle.
  • the actuator preferably has a significantly higher dynamic than the feed device, the main task of which is to provide a particle flow that is as constant as possible. By taking advantage of the higher dynamics of the actuator, the particle flow can be adjusted to be more fine-grained.
  • At least one of the actuators is designed as a valve.
  • the valve is arranged in particular between the feed device and the nozzle. With the valve, the particle flow from the feed device to the nozzle can be briefly interrupted or reduced.
  • the valve can be designed in such a way that a conveying gas flow, that is to say the particle flow with its conveying gas, is directed back into the feed device. This is particularly advantageous if the cold gas spray system has a system in which the feed device is under the same pressure with a conveying gas flow.
  • a control device that controls the flow of conveying gas can remain in place in this way, since, because of the same counter pressure, it only realizes with a delay that the valve is closed and thus counter-controls or counter-controls only later.
  • the valve should be opened regularly so that the pressure in the feed device, e.g. the powder feeder, doesn't get too big.
  • At least one of the actuators is designed as a valve which is arranged such that the particle flow is directed back into the feed device.
  • the particle flow with its conveying gas is fed back into the feed device. It is advantageous if the particle stream is fed into a pressurized powder container.
  • the valve can be implemented as a ball valve. It is particularly advantageous that existing systems can be expanded in this way.
  • the cold gas spray system has at least one buffer for temporarily buffering the particle flow.
  • the buffer can be designed in such a way that a particle flow or the conveying gas flow is buffered with the particles, if possible while maintaining the same pressure level. Expansion vessels or pressure compensation tanks, for example, can be used here.
  • At least one of the actuators is designed to feed the particle flow to the nozzle in a first position and to guide the particle flow into a buffer in a second position. It is possible that not only two discrete positions exist, but also intermediate positions in which at least parts of the particle flow are directed into the buffer. Appropriate valves could be provided for this purpose.
  • the advantage of a solution with a corresponding actuator and a buffer is that existing systems can be retrofitted, as pressure jumps caused by the buffer can be avoided.
  • the cold gas spray system has a control device which is designed to set a delivery rate of the feed device as a function of at least one state of one of the actuators. This has the great advantage that the actuator does not have to handle the full particle flow, but at least a reduction of the particle flow can be provided. If the feed device is now set in such a way that the actuating processes have sufficient dynamics to ensure a particle beam that is as continuous as possible, then, in combination with the actuators, very high dynamics of the particle quantity of the particle beam can be achieved.
  • the cold gas spray system has at least one control device which is designed to set a delivery rate of the feed device as a function of at least one travel speed of the nozzle.
  • the conveying speed of the feed device is a measure of the number of particles that the conveying device conveys per unit of time.
  • the particle flow can thus be influenced directly.
  • the travel speed of the nozzle can also be influenced. With a constant particle flow and increasing travel speed, the number of particles that are deposited on the substrate decreases. If the travel speed is increased and the delivery rate is reduced at the same time, an effect can be achieved which approximates a short-term reduction or interruption of the particle flow or the particle beam.
  • the control device can be designed particularly advantageously both as a function of a state of an actuator and the displacement speed of the nozzle.
  • the cold gas spray system has particle lines which are designed as buffers. If only short-term interruptions in the particle flow are provided, particle lines can be used unchanged. If longer-term interruptions and the associated buffering of higher pressures are provided, then somewhat more heavily designed particle lines can be used become. Existing systems can be expanded easily and advantageously in this way.
  • At least one of the actuators is designed such that a travel speed of the nozzle can be set as a function of the temporary reduction, in particular the interruption of the particle beam and / or the particle flow.
  • a robot arm can be provided that adjusts the travel speed of the nozzle accordingly. This is of great advantage, especially in combination with other actuators.
  • At least one of the actuators is designed as a mechanical element that blocks and / or deflects the particle beam after it emerges from the nozzle.
  • Such mechanical elements can, for example, be designed as a type of shutter that can be opened and closed.
  • the mechanical element can be designed as a drum-shaped or cylindrical element that has channels that allow the jet to pass through and channels that guide the jet away to the side, for example. This has the advantage that a very high dynamic can be achieved and it can be guaranteed that no particles of any kind hit the substrate to be coated. This can be of particular advantage in the case of particularly sensitive parts of the substrate, which must not be hit by the particle beam under any circumstances.
  • the object is also achieved by a method for controlling a cold gas spray system, which is designed as above according to a system according to the invention.
  • a method for controlling a cold gas spray system which is designed as above according to a system according to the invention.
  • at least one actuator is activated during operation to at least temporarily reduce, in particular to at least temporarily interrupt the particle flow and / or the particle jet.
  • At least one of the actuators is activated as a function of a travel speed of the nozzle. This enables an exact adaptation of the particle beam or the amount of particles arriving on the substrate by adapting the travel speed.
  • At least one actuator is activated as a function of a delivery rate of the feed device. This has the great advantage that the actuator can also be controlled at the same time via the delivery rate and thus the delivery rate controller can be used to control an actuator.
  • the delivery rate of the feed device is controlled as a function of a state of at least one actuator. For example, it is conceivable that when the path of the particle flow is blocked or throttled by an actuator, the delivery rate of the feed device is throttled in parallel and this is accordingly increased again before the actuator opens again, so that pressure jumps in the system can be avoided and particle delivery as uniform as possible can be made available for a particle beam that is as uniform as possible.
  • FIG 1 shows a cold gas spray system 100 with a nozzle 110 from which a particle jet 50 emerges.
  • the nozzle 110 is supplied with a propellant gas under pressure from a gas source 20 via a gas line 12. Furthermore, a particle stream 40 is fed to the nozzle 110 via a particle line 13A.
  • a feed device 130 has a particle reservoir 131 and is connected to an actuator 21 via a particle line 13.
  • the actuator 21 has two positions A and B.
  • the actuator 21 can be designed as a valve, for example. In position A, the particle stream 40 is guided unchanged to the nozzle 110 via the particle lines 13A. In position B, the particle stream 40 is passed into a buffer 180 via a particle line 13B. In position B, the particle flow 40 in the direction of the nozzle 110 is reduced or blocked in such a way that the particle beam 50 has a smaller number or no more particles.
  • the cold gas spray system 100 has a control device CTRL.
  • the control device CTRL is designed and integrated into the system in such a way that it can set a conveying rate of the feed device 130. This can be done, for example, via the speed of a drum conveyor.
  • the control device CTRL is connected to the actuator 21 and can control the actuator 21. It is thus conceivable that the control device CTRL controls the actuator 21 or the feed device 130 separately from one another. This can be advantageous in cases in which only a slight adjustment of the particle beam 50 is necessary. It is also conceivable that the control device CTRL controls the actuator 21 and the feed device 130 jointly and in a coordinated manner.
  • actuators 22 and 23 can also be provided, as shown in FIGS Figures 2 and Figures 3 are shown these can also be controlled by the control device CTRL.
  • FIG. 3 shows a cold gas spray system 100 based on the embodiment from FIG FIG 1 .
  • a further particle line 13C was provided, which is connected to the particle storage 131 and thus returns the accumulating gas with the unused particles. Since the particle storage 131 can also be under pressure, the conveying gas with the particles, which is then under approximately the same pressure, can be returned to the particle storage 131 via the particle line 13C.
  • the buffer 180 can also be omitted and the particle line 13B and particle line 13C can be connected directly to one another. This is the case, for example, if the line lengths of lines 13B and 13C are sufficient and / or short interruption times are required.
  • the line length possibly in connection with the additional buffer 180, has the advantageous effect, with sufficiently short interruption times, that no disruptive pressure control fluctuations are triggered in the powder feed circuit, so that the particle injection into the nozzle is suppressed unnoticed by the powder feed system or its controller.
  • FIG 3 shows an actuator 22, which in this case is designed as a type of screen, for example as a round sheet metal with one or more cutouts.
  • the actuator 22 By rotating by means of a rotary drive 220, the actuator 22 can be adjusted in such a way that a particle beam emerging from the nozzle 110 does not strike the substrate.
  • the drawing is only schematic and that the actuators 22, which are designed as mechanical elements, can also be implemented in a significantly more compact manner.
  • FIG 4 a similar concept of an actuator 23 can be seen, which is designed here as a drum and has deflection channels 230.
  • the deflection channels direct the particle beam from the nozzle 110 out of the focus area and thus also have the effect that the particle beam is briefly interrupted can.
  • blind holes can also be provided in the drum or in the cylindrical actuator 23, which are designed for briefly receiving the particle beam and its particles.
  • the invention relates to a cold gas spray system (100) for generating an adjustable particle beam (50) and a method for controlling such a cold gas spray system (100).
  • the cold gas spray system (100) have a nozzle (110) from which the particle beam (50) emerges, a feed device ( 130) for feeding a particle stream (40) to the nozzle (110) and one or more actuators (21, 22, 23) which are designed so that the particle stream (40) and / or the particle beam (50) during operation temporarily reduced, in particular can be temporarily interrupted.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Nozzles (AREA)
EP19196216.6A 2019-09-09 2019-09-09 Kaltgasspritzanlage mit einstellbarem partikelstrahl Withdrawn EP3789516A1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP19196216.6A EP3789516A1 (de) 2019-09-09 2019-09-09 Kaltgasspritzanlage mit einstellbarem partikelstrahl
EP20764022.8A EP3990681B1 (de) 2019-09-09 2020-08-13 Kaltgasspritzanlage mit einstellbarem partikelstrahl
PCT/EP2020/072771 WO2021047855A1 (de) 2019-09-09 2020-08-13 Kaltgasspritzanlage mit einstellbarem partikelstrahl
CN202080062693.0A CN114375350A (zh) 2019-09-09 2020-08-13 带有可调节粒子射束的冷气喷射设备
US17/641,623 US20220347702A1 (en) 2019-09-09 2020-08-13 Cold Gas Spraying System Having an Adjustable Particle Jet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19196216.6A EP3789516A1 (de) 2019-09-09 2019-09-09 Kaltgasspritzanlage mit einstellbarem partikelstrahl

Publications (1)

Publication Number Publication Date
EP3789516A1 true EP3789516A1 (de) 2021-03-10

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Family Applications (2)

Application Number Title Priority Date Filing Date
EP19196216.6A Withdrawn EP3789516A1 (de) 2019-09-09 2019-09-09 Kaltgasspritzanlage mit einstellbarem partikelstrahl
EP20764022.8A Active EP3990681B1 (de) 2019-09-09 2020-08-13 Kaltgasspritzanlage mit einstellbarem partikelstrahl

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP20764022.8A Active EP3990681B1 (de) 2019-09-09 2020-08-13 Kaltgasspritzanlage mit einstellbarem partikelstrahl

Country Status (4)

Country Link
US (1) US20220347702A1 (zh)
EP (2) EP3789516A1 (zh)
CN (1) CN114375350A (zh)
WO (1) WO2021047855A1 (zh)

Citations (3)

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DE102004021847A1 (de) * 2004-05-04 2005-12-01 Linde Ag Verfahren und Vorrichtung zum thermischen Spritzen
EP1806429A1 (de) * 2006-01-10 2007-07-11 Siemens Aktiengesellschaft Kaltspritzanlage und Kaltspritzverfahren mit moduliertem Gasstrom
US20150190824A1 (en) * 2014-01-08 2015-07-09 United Technologies Corporation Cold spray systems with in-situ powder manufacturing

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EP1806429A1 (de) * 2006-01-10 2007-07-11 Siemens Aktiengesellschaft Kaltspritzanlage und Kaltspritzverfahren mit moduliertem Gasstrom
US20150190824A1 (en) * 2014-01-08 2015-07-09 United Technologies Corporation Cold spray systems with in-situ powder manufacturing

Also Published As

Publication number Publication date
WO2021047855A1 (de) 2021-03-18
CN114375350A (zh) 2022-04-19
EP3990681B1 (de) 2023-09-27
EP3990681C0 (de) 2023-09-27
US20220347702A1 (en) 2022-11-03
EP3990681A1 (de) 2022-05-04

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