EP3700711B1 - Dispositif et procédé de traitement d'une pièce - Google Patents

Dispositif et procédé de traitement d'une pièce Download PDF

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Publication number
EP3700711B1
EP3700711B1 EP18795363.3A EP18795363A EP3700711B1 EP 3700711 B1 EP3700711 B1 EP 3700711B1 EP 18795363 A EP18795363 A EP 18795363A EP 3700711 B1 EP3700711 B1 EP 3700711B1
Authority
EP
European Patent Office
Prior art keywords
flow path
jet
fluid
closing body
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.)
Active
Application number
EP18795363.3A
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German (de)
English (en)
Other versions
EP3700711A1 (fr
Inventor
Ruben KAPP
Karsten Frank
Dominic Schehrer
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3700711A1 publication Critical patent/EP3700711A1/fr
Application granted granted Critical
Publication of EP3700711B1 publication Critical patent/EP3700711B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C5/00—Devices or accessories for generating abrasive blasts
    • B24C5/02—Blast guns, e.g. for generating high velocity abrasive fluid jets for cutting materials
    • B24C5/04—Nozzles therefor
    • 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
    • B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
    • B05B1/08—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape of pulsating nature, e.g. delivering liquid in successive separate quantities ; Fluidic oscillators
    • B05B1/083—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape of pulsating nature, e.g. delivering liquid in successive separate quantities ; Fluidic oscillators the pulsating mechanism comprising movable parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/10—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for compacting surfaces, e.g. shot-peening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C5/00—Devices or accessories for generating abrasive blasts
    • B24C5/005—Vibratory devices, e.g. for generating abrasive blasts by ultrasonic vibrations
    • 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
    • B05B7/1481—Spray pistols or apparatus for discharging particulate material
    • B05B7/149—Spray pistols or apparatus for discharging particulate material with separate inlets for a particulate material and a liquid to be sprayed

Definitions

  • the invention relates to a device according to the preamble of claim 1 for treating a component, and also to a method according to the preamble of claim 8 for treating a component.
  • a device and such a method are from the document DE 10 2013 201 197 A1 known.
  • the strength of components can be significantly increased by the targeted introduction of residual compressive stresses.
  • Components that come into consideration for this are, for example, components having weld seams and components subjected to internal pressure or also axle shafts or the like.
  • a method suitable for increasing the strength is liquid blasting for treating a component surface, with the depth effect being small and control over the treatment process being possible only to a limited extent.
  • a method and a device for treating a component are known, in which at least a part of the surface of the component is blasted with a blasting medium to generate internal compressive stresses, the blasting medium comprising a liquid and particles, the liquid and the particles being designed in such a way that during the irradiation essentially the internal stress state of the component is changed.
  • the DE 10 2013 201 797 A1 discloses in a device with a high-pressure pump for conveying a fluid through at least one nozzle to generate at least one fluid jet which is suitable for the erosive machining of a material, a device for generating emerging through the nozzle New page 1a of the description
  • Fluid pulses wherein the fluid pulses are each designed to remove a predetermined amount of particles from the material.
  • a closing body is arranged in the at least one flow path of the nozzle body, wherein the closing body can be moved back and forth alternately between a position releasing the flow path and a position blocking the flow path in order to form a pulsating jet that where the at least one feed channel merges into the flow path, is arranged downstream of the closing body in the direction of flow, so that jet pulses of the pulsating jet form a solidified fluid and particle jet on their way to the nozzle outlet opening by entraining solid particles from the at least one feed channel.
  • the solid particles can be mixtures formed from nanoparticles, for example, which can be applied to a surface at high speed in order to process it, which leads to correspondingly structured or extremely smooth surfaces of high quality and to special functional surfaces. Since the at least one flow path between the closing body and a nozzle outlet opening of the nozzle body has an approximately constant line cross section, a solidified pulsating jet with an approximately homogeneously compressed jet cross section forms at the nozzle outlet opening.
  • a plurality of feed channels are expediently provided in the nozzle body, which makes it possible to produce a high density of solid particles in the solidified pulsating jet.
  • the supply channels in the junction area each form an angle with the flow path which is less than or equal to 90°, preferably between about 30° and 60° or at an acute angle merging into the flow path, a relatively strong suction effect on the solid particles brought up in the feed channels, which leads to a high proportion and therefore high degree of mixing of these particles in the fluid component.
  • a preferred embodiment of the invention with which this suction effect can be optimally utilized, can consist in the supply channels each having a line cross section that gradually narrows towards the junction area in the direction of flow.
  • the feed channels are arranged to run symmetrically to the direction of the flow path.
  • a configuration of the invention that is relatively easy to implement consists in that the at least one flow path extends along a longitudinal central axis of the nozzle body.
  • the closing body can be controlled via a servo-hydraulic, a mechanical or a directly acting actuator which can be operated magnetically or piezoelectrically.
  • a pulsating fluid jet is generated in a nozzle body, at least one flow path being alternately opened and closed by means of a closing body, in order to pulse the fluid jet in each open state of the flow path to pass, whereupon solid particles brought in via at least one feed channel are successively caught and entrained by the fluid jet let through in pulses in such a way that a pulsating jet solidified from fluid and solid particles is generated, and that the solidified pulsating jet then passes through at least one nozzle outlet opening onto a surface of the Component is radiated to there at least locally To cause internal stresses, wherein the at least one flow path (12) between the closing body (13) and the nozzle outlet opening (18) of the nozzle body (11) has an approximately constant line cross section.
  • the method is advantageously suitable for plating components, in that, for example, particles of metallic material can be applied to a component surface, as a result of which functional surfaces can be created locally.
  • the plating can also be done selectively.
  • the method is also advantageously suitable for doping materials, for example by radiating or shooting particles of ferromagnetic material into surfaces of a non-ferromagnetic material, whereby a local information carrier can be generated, for example, which can be read out magnetically.
  • the method is also suitable for surface structuring.
  • the solid particles can be brought in together with a fluid component via the at least one feed channel.
  • One embodiment of the method according to the invention can consist in the solidified pulsating jet being generated with an adjustable pulse frequency which lies in a pulse frequency range from a single shot up to a pulse frequency of approximately 5 kHz.
  • the pulse frequency as a beam parameter can therefore advantageously be set as a function of the respective application and can also be varied during the treatment process—as a process parameter relevant to component treatment. Additional beam parameters such as pulse length and pulse spacing, which can be set due to the design, allow the control of the treatment or production process to be improved even more.
  • a pre-procedural cleaning step of components or workpieces to be irradiated is not absolutely necessary because of the fluid jet component, so that a cost reduction can therefore be achieved.
  • the high level of production control during the blasting of components makes it possible to reduce the reject rate and thus increase efficiency and productivity.
  • a component that is surface-treated according to such a method has increased structural strength due to internal compressive stresses that have been introduced and is therefore suitable for use under higher loads without further adaptation of the geometry and/or material, as is the case here This is the case, for example, for components in systems that carry high pressure or are under other types of loads.
  • FIG. 1 a view of a section of a nozzle body of the device according to the invention, mainly in longitudinal section.
  • FIG. 1 shows a highly schematic longitudinal section of a device designated as a whole by 10, which has a nozzle body 11 with a central flow path or through-channel 12, which runs coaxially to the longitudinal central axis 11' of the nozzle body 11, a closing body 13 accommodated in the through-channel 12, and a plurality of supply channels 14, 14', which open into the through-channel 12 in a region 12' downstream of the closing body 13, where a fluid 15 flowing in the central through-channel 12 and solid particles 16 brought in from the supply channels 14, 14' form a solidified jet 17 is generated, which emerges from an outlet opening 18 designed as a pinhole in the nozzle body 11 and irradiates a surface 19' of a component 19 to be treated which is arranged in the jet direction, the jet direction being aligned with the longitudinal central axis 11' of the nozzle body 11.
  • the closing body 13 is arranged in a larger-diameter region 20 of the central through-channel 12 so as to be displaceable along the longitudinal central axis 11' and is moved axially back and forth in time with a control (not shown) alternating between a position opening the through-channel 12 and a shutting-off position, a pulsating fluid jet is generated.
  • the fluid that is introduced into the through-channel 12 can be in the form of test oil or water
  • the particles 16, which are fed in as solid blasting media via the supply channels 14, 14' can be in the form of steel balls or nanoparticles, for example be able; other Exemplary embodiments of the solid blasting agent include round, angular or elongated particles.
  • the particles can be organic, inorganic, mineral (eg corundum, glass) but also metallic (eg chilled cast iron, steel, zinc).
  • the particle sizes used can be in the nano range, depending on the application also in the ⁇ m range, for example in a size distribution between 40 and 70 ⁇ m, or also in the millimeter range.
  • the fluid 15 which is supplied in compressed form to the central passage 12 of the nozzle body 11 by means of a high-pressure feed pump (not shown), flows in pulses through the area 20 past the closing body 13 via a tapering area 21 into an end section 12' of the through-channel 12 with a smaller diameter.
  • the fluid - due to the increased fluid speed of, for example, 500 m/s in the narrowed line cross-section as a function of the system pressure - carries away particles 16 with each jet pulse, which are located in the supply channels 14, 14', which open into the end section 12' of the through-channel 12, namely into the junction area 22.
  • the junction area 22 is arranged approximately intermediately between the conically tapering area 21 and the nozzle outlet opening 18 . This generates a pulsating solidified jet 17, which is formed from jet pulses that follow one another in time and are therefore spaced apart from one another in the jet direction.
  • the flow path or through-channel 12 for the fluid is shut off and a respective jet impulse is thus defined in the pulsating fluid jet.
  • the closing body 13 is in its position blocking the flow path or throughflow channel 12 , the closing body 13 with its cone-shaped head 13 ′ being in positive contact with the conically tapering area 21 of the throughflow channel 12 .
  • the supply channels 14, 14' each have two sections, of which a respective first section 14-1, 14'-1 is parallel to the longitudinal central axis 11' and thus parallel to the through-channel 12, in order then to merge into a second section 14-2, 14'-2 in the flow direction, which runs obliquely at an angle ⁇ to the longitudinal central axis 11' and opens into the flow path or through-channel 12.
  • both feed channels 14, 14' run symmetrically to the longitudinal central axis 11'.
  • the angle ⁇ is dimensioned such that it lies in an angular range of 30° ⁇ _60°.
  • the respective second section of the supply channels 14, 14' has a line cross section that narrows continuously towards the junction area 22 and has a spatial opening angle ⁇ of approximately 10°.
  • the closing body 13 can be controlled via a servo-hydraulic, a mechanical or a direct-acting actuator, which can be operated magnetically or piezoelectrically, in order to, in cooperation with the control (not shown) and - optionally - a servo-hydraulic switching valve to be able to switch between its open position and its blocked position.
  • a servo-hydraulic a mechanical or a direct-acting actuator, which can be operated magnetically or piezoelectrically, in order to, in cooperation with the control (not shown) and - optionally - a servo-hydraulic switching valve to be able to switch between its open position and its blocked position.
  • adjustable pulse frequencies for the solidified pulsating jet of up to about 5 kHz are possible.
  • the pulse length and/or the pulse spacing can also be set separately.
  • the pulse interval can be varied as a beam parameter.
  • the pulse length can be at least 90 ⁇ s, with a typical pulse length, for example, preferably being
  • a pulsating fluid jet is generated in a nozzle body 11, the flow path 12 being alternately opened and closed by means of the closing body 13 in order to let the fluid jet through in pulses in each open state of the flow path 12, whereupon via the supply channels 14, 14' are caught and entrained by the fluid jet that is let through in pulses in such a way that a pulsating jet 17 solidified from fluid 15 and solid particles 16 is generated, and that the solidified pulsating jet 17 then passes through at least one nozzle outlet opening 18 onto a surface 19' of the component 19 is radiated in order to cause internal stresses there at least locally.
  • the solidified pulsating jet is generated with a pulse frequency which is in a pulse frequency range from a few Hertz to about 5 kHz. Depending on the application, the pulse frequency can therefore be adjusted.
  • Pulse frequency, pulse length and/or pulse spacing are adjustable beam parameters of the method according to the invention, which serve as variable process parameters for and/or during the treatment procedure of a component.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Powder Metallurgy (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Nozzles (AREA)

Claims (9)

  1. Dispositif de traitement d'un composant, le dispositif comportant un corps de buse pourvu d'au moins un trajet d'écoulement destiné à l'introduction d'un fluide et d'au moins un conduit d'amenée de particules solides, un jet formé à partir du fluide et des particules solides sortant par au moins une ouverture de sortie de buse du corps de buse, un corps de fermeture (13) étant disposé dans l'au moins un trajet d'écoulement (12) du corps de buse (11), le corps de fermeture (13) pouvant être déplacé suivant un mouvement alternatif entre une position libérant le trajet d'écoulement (12) et une position bloquant le trajet d'écoulement (12) afin de former un jet pulsé, une zone d'embouchure (22), où l'au moins un conduit d'amenée (14, 14') rejoint le trajet d'écoulement (12), étant disposée en aval du corps de fermeture (13) dans le sens d'écoulement de sorte que les impulsions d'un jet pulsé forme un jet pulsé solidifié de fluide (15) et de particules (16) sur leur chemin jusqu'à l'ouverture de sortie de buse (18) par entraînement de particules solides provenant de l'au moins un conduit d'amenée, caractérisé en ce que l'au moins un trajet d'écoulement (12) a, entre le corps de fermeture (13) et une ouverture de sortie de buse (18) du corps de buse (11), une section transversale de conduite à peu près constante.
  2. Dispositif selon la revendication 1, caractérisé en ce que plusieurs conduits d'amenée (14, 14') sont prévus dans le corps de buse (11).
  3. Dispositif selon la revendication 2, caractérisé en ce que, dans la zone d'embouchure (22), les conduits d'amenée (14, 14') forment chacun avec le trajet d'écoulement (12) un angle inférieur ou égal à 90°, de préférence compris entre environ 30° et 60°.
  4. Dispositif selon la revendication 2 ou 3, caractérisé en ce que les conduits d'amenée (14, 14') ont chacun une section transversale de conduite qui se rétrécit progressivement en direction de la zone d'embouchure (22) dans le sens de l'écoulement.
  5. Dispositif selon l'une des revendications 2 à 4, caractérisé en ce que les conduits d'amenée (14, 14') sont disposés de manière à s'étendre symétriquement par rapport à la direction du trajet d'écoulement (12).
  6. Dispositif selon l'une des revendications 1 à 5, caractérisé en ce que l'au moins un trajet d'écoulement (12) s'étend le long d'un axe longitudinal médian (11') du corps de buse (11).
  7. Dispositif selon l'une des revendications 1 à 6, caractérisé en ce que le corps de fermeture (13) peut être commandé par un élément d'actionnement servo-hydraulique, mécanique ou à action directe qui peut être actionné par des moyens magnétiques ou piézoélectriques.
  8. Procédé de traitement d'un composant, un jet de fluide pulsé étant généré dans un corps de buse (11), au moins un trajet d'écoulement (12) étant alternativement libéré et fermé au moyen d'un corps de fermeture (13) afin de laisser passer le jet de fluide par impulsions lorsque le trajet d'écoulement (12) est à chaque fois libéré, après quoi des particules solides amenées par le biais d'au moins un conduit d'amenée (14, 14') étant successivement capturées et entraînées par le jet de fluide passant par impulsions de manière à générer un jet pulsé solidifié formé de fluide et de particules solides, et projeter ensuite le jet de fluide pulsé solidifié sur une surface du composant (19) à travers au moins une ouverture de sortie de buse (18) afin d'y provoquer au moins localement des contraintes résiduelles, caractérisé en ce que
    l'au moins un trajet d'écoulement (12) a, entre le corps de fermeture (13) et l'ouverture de sortie de buse (18) du corps de buse (11), une section transversale de conduite à peu près constante.
  9. Procédé selon la revendication 8, caractérisé en ce que le jet pulsé solidifié est généré à une fréquence d'impulsions réglable dans une plage d'impulsions allant d'une impulsion unique à une fréquence d'impulsions d'environ 5 kHz.
EP18795363.3A 2017-10-26 2018-10-22 Dispositif et procédé de traitement d'une pièce Active EP3700711B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017219248.8A DE102017219248A1 (de) 2017-10-26 2017-10-26 Vorrichtung und Verfahren zum Behandeln eines Bauteils
PCT/EP2018/078843 WO2019081403A1 (fr) 2017-10-26 2018-10-22 Dispositif et procédé de traitement d'une pièce

Publications (2)

Publication Number Publication Date
EP3700711A1 EP3700711A1 (fr) 2020-09-02
EP3700711B1 true EP3700711B1 (fr) 2023-01-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP18795363.3A Active EP3700711B1 (fr) 2017-10-26 2018-10-22 Dispositif et procédé de traitement d'une pièce

Country Status (3)

Country Link
EP (1) EP3700711B1 (fr)
DE (1) DE102017219248A1 (fr)
WO (1) WO2019081403A1 (fr)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4762277A (en) * 1982-12-06 1988-08-09 Briggs Technology Inc. Apparatus for accelerating slugs of liquid
DE3516103A1 (de) * 1985-05-04 1986-11-06 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München Mischkopf zum einbringen von abrasiven partikeln in einen hochdruckwasserstrahl
JPS6228173A (ja) * 1985-07-30 1987-02-06 Inoue Japax Res Inc 表面処理又は材料切断方法及び装置
CN102958616B (zh) * 2009-10-06 2016-06-01 苏舍美特科（美国）公司 利用脉冲射流为热喷涂层制备气缸孔表面的方法和设备
US8389066B2 (en) * 2010-04-13 2013-03-05 Vln Advanced Technologies, Inc. Apparatus and method for prepping a surface using a coating particle entrained in a pulsed waterjet or airjet
DE102010043285A1 (de) 2010-11-03 2012-05-03 Aktiebolaget Skf Verfahren, Strahlmittel und Vorrichtung zum Behandeln eines Bauelements
DE102013201797A1 (de) * 2013-02-05 2014-08-07 Robert Bosch Gmbh Vorrichtung mit einer Hochdruckpumpe zum Fördern eines Fluids
CA2870682C (fr) * 2013-11-08 2017-10-24 Vln Advanced Technologies Inc. Systeme de jet fluide integre pour decaper, preparer et enduire une piece
DE102014226432A1 (de) * 2014-12-18 2016-06-23 Robert Bosch Gmbh Verfahren zum Flüssigkeitsstrahl-Entschichten von Oberflächen

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Publication number Publication date
DE102017219248A1 (de) 2019-05-02
WO2019081403A1 (fr) 2019-05-02
EP3700711A1 (fr) 2020-09-02

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