EP3616809A1 - Procédé de fabrication d'outil de frittage, dispositif de frittage et procédé de fabrication d'une machine électrique - Google Patents

Procédé de fabrication d'outil de frittage, dispositif de frittage et procédé de fabrication d'une machine électrique Download PDF

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Publication number
EP3616809A1
EP3616809A1 EP18192005.9A EP18192005A EP3616809A1 EP 3616809 A1 EP3616809 A1 EP 3616809A1 EP 18192005 A EP18192005 A EP 18192005A EP 3616809 A1 EP3616809 A1 EP 3616809A1
Authority
EP
European Patent Office
Prior art keywords
sintering
sintered
sintered product
product surface
furnace
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Withdrawn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
EP18192005.9A
Other languages
German (de)
English (en)
Inventor
Jörg Dr. Buschbeck
Gotthard Dr. Rieger
Carsten Dr. Schuh
Thomas Dr. Soller
Rolf Vollmer
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 EP18192005.9A priority Critical patent/EP3616809A1/fr
Priority to PCT/EP2019/072350 priority patent/WO2020043565A1/fr
Publication of EP3616809A1 publication Critical patent/EP3616809A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/003—Apparatus, e.g. furnaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B22F3/1017—Multiple heating or additional steps
    • B22F3/1021—Removal of binder or filler
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/006—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of flat products, e.g. sheets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B22F2003/1042—Sintering only with support for articles to be sintered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy

Definitions

  • the invention relates to a method for producing sintered products and a sintering device and a method for producing an electrical machine.
  • Stencil printing is a novel method for producing sintered products, in particular magnetic sheets for electrical machines.
  • a printing paste is first formed from metal powders, which is subsequently processed by means of a stencil printing technique to form a green body in the form of a thick layer. This green body is then subjected to thermal treatment, i.e. by means of debinding and sintering, converted into a metallic and possibly structured sheet.
  • sintering is carried out by means of a sintering tool which has at least one sintered product surface for contacting the sintered product.
  • the sintered product surface is set in vibration during sintering and / or debinding.
  • the vibration which is brought about according to the invention during sintering and / or debinding forms an alternative to separating agents, to reduce the positive and / or non-positive connection of sintered product and a sintered product surface of the sintering tool.
  • frictional forces between the sintered product and the sintered product surface can be reduced.
  • a homogeneous shrinkage of the sintered product on or in the sintering tool can be achieved, so that a sintered product with high geometric accuracy and reduced distortion results.
  • the postprocessing effort is consequently significantly reduced in comparison to previously known methods for producing a sintered product.
  • a release agent can be dispensed with, so that large-area and / or geometrically complex sintered products can also be manufactured with high geometric accuracy.
  • non-circular and non-rotationally symmetrical or complex structures can be manufactured according to the invention as geometrically true sintered products.
  • the method according to the invention can also be used to produce in a particularly cost-effective manner, since the manufacturing costs are reduced significantly according to the invention due to the dispensability of a release agent.
  • the sintered product surface is preferably set in vibration by coupling acoustic waves into the sintered tool. Vibration of the sintered product surface can be caused particularly easily by means of acoustic waves. Acoustic waves advantageously bring about a dynamic relative movement of locations on the sintered product surface by means of minimal deflection vibrations, which cause a relative displacement of the sintered product surface and a surface of the sintered product lying against it, which, however, do not cause a shift in the temporal center position of the sintered product surface.
  • the acoustic waves comprise at least surface waves.
  • locations of the sintered surface advantageously oscillate in the direction of the planar extensions of the sintered product surface in the stationary state, ie in the directions of extension of the tangential plane to the Sinter product surface, as well as in the direction perpendicular to these directions. In this way, adhesions between the sintered product and the sintered product surface are particularly effectively avoided.
  • the sintering tool expediently has a sintering support and the sintered product surface is formed with a supporting surface of the sintering support.
  • a contact surface is particularly suitably adapted for the sintering and debinding of layers, flat parts and sheets, such as in particular rotor sheets.
  • an actuator in particular an acoustic wave source, preferably an interdigital transducer, is preferably used, which is or is arranged on the sintered product surface to excite vibration.
  • an interdigital transducer is advantageously particularly suitable for exciting acoustic vibrations in the manner of surface waves on a surface.
  • sintering is carried out in a furnace and the actuator is provided inside and / or outside the furnace and is coupled to the sintered product surface in a manner that excites vibrations.
  • Actuators arranged inside the furnace or outside the furnace can expediently be used, which bear against the sintered product surface by means of extensions or force couplings and couple in vibrations such as in particular acoustic waves, preferably by means of positive and / or frictional engagement.
  • sintering is preferably carried out in the form of a tunnel kiln.
  • an actuator for generating vibrations on the sintered product surface can advantageously be provided, which actuator is moved into the furnace together with the sintering tool, preferably by means of an assembly line.
  • the actuator is advantageously controlled, preferably as a function of a temperature during sintering and / or debinding and / or of a speed of the sintering tool entering and / or passing through or through the furnace.
  • the actuator is expediently controlled by setting at least one excitation intensity of vibrations or a chronological sequence of operating and resting phases of the actuator.
  • a layer in particular a rotor plate, is preferably sintered.
  • a layer in particular a rotor plate
  • high geometric accuracy and low-distortion production are particularly relevant.
  • production using release agents in the case of complex sintered products is difficult to accomplish, so that the method according to the invention offers a particularly accurate and cost-effective solution in this development.
  • a layer to be sintered in particular the rotor plate, is printed before it is sintered, in particular by means of stencil printing.
  • the sintering device according to the invention is designed in particular to carry out the method according to the invention as described above.
  • the sintering device according to the invention suitably comprises a sintering tool with a sintered product surface and an actuator which is vibration-coupled to the sintered product surface.
  • the sintering device expediently also comprises a furnace which is designed for sintering.
  • the actuator suitably comprises an acoustic wave source for exciting acoustic waves, in particular an interdigital transducer.
  • the sintering tool advantageously comprises a sintered support with a support surface and the sintered product surface is formed with the support surface of the sintered support.
  • a rotor of the electrical machine is manufactured.
  • the rotor is formed with one or more rotor plates, which are produced by a method according to the invention as described above.
  • the inventive manufacturing device 10 shown is used for the inventive manufacturing of a magnetic sheet 20 for an electrical machine.
  • the manufacturing device 10 comprises a support 30 on which the magnetic sheet 20 is printed.
  • a printing paste containing metal particles is used, which is printed on the support 30 as a green body by means of stencil printing technology.
  • the separating agent layer 40 can also be omitted and the green body lies directly on the support 30.
  • the support 30 is placed together with the green body for the subsequent metal sheet 20 and the separating agent layer 40 on a conveyor belt 50, which moves the support 30 through a debinding and sintering furnace 60 in the form of a tunnel furnace.
  • the support 30 can also be placed on a frame which is placed in a debinding and sintering furnace in the form of a chamber furnace.
  • the edition 30 is in Fig. 1 illustrated embodiment passed through the debinding and sintering furnace 60 by means of the conveyor belt 50.
  • An excitation source 70 for excitation of surface acoustic waves is arranged in the support 30 on the support 30.
  • the excitation source 70 is, for example, an interdigital transducer, and can also be implemented as another actuator in further exemplary embodiments, not shown.
  • the excitation source 70 is formed on a flat side 80 of the support 30 close to the green body.
  • the excitation source 70 can form acoustic surface waves on the flat side 80 of the support 30 close to the green body, so that adhesion of the support 30 and the release agent layer 40 and of the green body and release agent layer 40 as well as adhesion of the later metal sheet 20 to the release agent layer 40 is effectively prevented.
  • the excitation source 70 does not necessarily work continuously in the method according to the invention, but is signal-connected in the exemplary embodiment shown by means of radio signals to a control device 100, which the excitation source 70 depends on the temperature of the debinding and sintering oven 60 and on the speed of the conveyor belt 50 or else controls a given program.
  • the surface waves are emitted at intervals and / or with variable intensity.
  • the excitation source 70 can also be arranged separately from the support 30, for example outside the tunnel furnace his.
  • the acoustic waves can be guided into the tunnel furnace by means of extensions at the excitation source 70 and transmitted to the flat side 80 of the support 30.
  • the support 30 can in principle also be vibrated with bulk acoustic waves.
  • the metal sheets 20 are sintered.
  • the metal sheets 20 produced according to the invention are joined and sintered and thus form a rotor of an electrical machine manufactured according to the invention in the form of an electric motor 400.
  • the electric machine is a generator in further exemplary embodiments that are not specifically shown.
  • the electric motor 400 comprises a stator 420, within which a rotor 410 formed with the metal sheets 20 is rotatably mounted.
  • the electric machine 400 is used to drive a hybrid electric aircraft.
  • the electrical machine 400 can be provided for driving another electrical vehicle or as an electric motor in another industrial system.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • General Engineering & Computer Science (AREA)
  • Powder Metallurgy (AREA)
  • Manufacture Of Motors, Generators (AREA)
EP18192005.9A 2018-08-31 2018-08-31 Procédé de fabrication d'outil de frittage, dispositif de frittage et procédé de fabrication d'une machine électrique Withdrawn EP3616809A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP18192005.9A EP3616809A1 (fr) 2018-08-31 2018-08-31 Procédé de fabrication d'outil de frittage, dispositif de frittage et procédé de fabrication d'une machine électrique
PCT/EP2019/072350 WO2020043565A1 (fr) 2018-08-31 2019-08-21 Procédé de production d'un produit fritté, dispositif de frittage et procédé de production d'une machine électrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18192005.9A EP3616809A1 (fr) 2018-08-31 2018-08-31 Procédé de fabrication d'outil de frittage, dispositif de frittage et procédé de fabrication d'une machine électrique

Publications (1)

Publication Number Publication Date
EP3616809A1 true EP3616809A1 (fr) 2020-03-04

Family

ID=63452547

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18192005.9A Withdrawn EP3616809A1 (fr) 2018-08-31 2018-08-31 Procédé de fabrication d'outil de frittage, dispositif de frittage et procédé de fabrication d'une machine électrique

Country Status (2)

Country Link
EP (1) EP3616809A1 (fr)
WO (1) WO2020043565A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023186216A1 (fr) * 2022-04-01 2023-10-05 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein Procédé et système de frittage pour produire un composant fritté à l'aide d'une ébauche de composant, et substrat de frittage
EP3857580B1 (fr) * 2018-11-16 2024-08-07 Siemens Aktiengesellschaft Tôle électrique imprimée

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3960334A1 (fr) * 2020-08-31 2022-03-02 Siemens Aktiengesellschaft Procédé de fabrication d'une machine électrique ainsi qu'installation et véhicule

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05209204A (ja) * 1991-03-15 1993-08-20 Kawasaki Steel Corp 鉄系焼結部材の製造方法
JPH081076A (ja) * 1994-06-21 1996-01-09 Matsushita Electric Ind Co Ltd 薄膜の塗布製膜方法
JPH1095676A (ja) * 1996-09-24 1998-04-14 Matsushita Electric Works Ltd セラミック基板の製造方法
US20170282462A1 (en) * 2014-10-01 2017-10-05 Panasonic Intellectual Property Management Co., Lt d. Method for manufacturing three-dimensional shaped object

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05209204A (ja) * 1991-03-15 1993-08-20 Kawasaki Steel Corp 鉄系焼結部材の製造方法
JPH081076A (ja) * 1994-06-21 1996-01-09 Matsushita Electric Ind Co Ltd 薄膜の塗布製膜方法
JPH1095676A (ja) * 1996-09-24 1998-04-14 Matsushita Electric Works Ltd セラミック基板の製造方法
US20170282462A1 (en) * 2014-10-01 2017-10-05 Panasonic Intellectual Property Management Co., Lt d. Method for manufacturing three-dimensional shaped object

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3857580B1 (fr) * 2018-11-16 2024-08-07 Siemens Aktiengesellschaft Tôle électrique imprimée
WO2023186216A1 (fr) * 2022-04-01 2023-10-05 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein Procédé et système de frittage pour produire un composant fritté à l'aide d'une ébauche de composant, et substrat de frittage

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WO2020043565A1 (fr) 2020-03-05

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