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WO2015176859A1 - Corps de contact électrique et fabrication de ce dernier par impression 3d - Google Patents

Corps de contact électrique et fabrication de ce dernier par impression 3d Download PDF

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Publication number
WO2015176859A1
WO2015176859A1 PCT/EP2015/057032 EP2015057032W WO2015176859A1 WO 2015176859 A1 WO2015176859 A1 WO 2015176859A1 EP 2015057032 W EP2015057032 W EP 2015057032W WO 2015176859 A1 WO2015176859 A1 WO 2015176859A1
Authority
WO
WIPO (PCT)
Prior art keywords
contact body
contact
concentrations
incorporated
generated
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.)
Ceased
Application number
PCT/EP2015/057032
Other languages
German (de)
English (en)
Inventor
Werner Hartmann
Norbert Wenzel
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
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Publication of WO2015176859A1 publication Critical patent/WO2015176859A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H01H1/0203—Contacts characterised by the material thereof specially adapted for vacuum switches
    • H01H1/0206—Contacts characterised by the material thereof specially adapted for vacuum switches containing as major components Cu and Cr
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/06—Contacts characterised by the shape or structure of the contact-making surface, e.g. grooved
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
    • H01H11/048—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts by powder-metallurgical processes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
    • H01H33/6643—Contacts; Arc-extinguishing means, e.g. arcing rings having disc-shaped contacts subdivided in petal-like segments, e.g. by helical grooves

Definitions

  • the present invention relates to an electrical contact body according to the preamble of the main claim and a method for its production.
  • Vacuum interrupters are used in power engineering for medium and high voltage switchgear.
  • Contact systems of vacuum interrupters consist of a contact carrier and, for example, a contact plate soldered thereto, namely in the case of plate contacts, axial magnetic field contacts and spiral contacts, or a soldered contact ring, in particular in pot contacts.
  • copper or copper alloys are used as contact carrier material.
  • material composites made of different materials are used, such as, for example, CuCr or WCu or WCCu or Wag or WCAg.
  • contact disks or contact pieces and possibly contact disk rings are produced by means of powder metallurgy or arc melting techniques.
  • the surface structures and, if necessary, slots required for the switching properties of the contact disks or contact disk rings are then achieved by means of cutting processes, for example milling.
  • Standard methods are, on the one hand, the metallurgical production of molded parts for individual contacts, which are pre-pressed, sintered and, if appropriate, soaked, in order to achieve a high density or a low porosity.
  • sintered semi-finished products manufactured by powder metallurgy are produced, which are remelted in a plasma arc, compacted and refined in grain size, in order subsequently to be machined, eg by sawing, turning, milling, etc., into the respective contact to be brought. It is also known to produce individual contact pieces by means of injection molding (injection molding), which are subsequently sintered and possibly imbibed. These conventional methods allow the production of a variety of material compositions.
  • Vacuum interrupters in particular for medium and high voltage switchgear, have a contact carrier and a mounted thereon, in particular soldered, contact body, for example in the form of a contact disk or Kunststoffringsay.
  • Switching contacts in air-insulated switching devices are, for example, circuit breakers or contactors.
  • the object is achieved by a method according to the features of the main claim and a contact body according to the features of the independent claim.
  • a method for producing a contact body for an electrical switching contact in particular for a vacuum interrupter or an air-insulated switch for the medium and / or Hochwoodsbe- rich proposed, wherein the contact body of a composite material at least one with a concentration in a matrix embedded material extends in an x, y, z coordinate system, on a contact carrier (5) can be fixed and contacted with a further electrical contact body, wherein the concentrations of the incorporated material in the matrix or the material compositions of the material of the compound depending on the spatial position in the contact body by each x, y and z coordinate by means one of a three-dimensional printer executed three-dimensional printing process individually generated. Accordingly, a respective concentration in and on the contact body can be changed.
  • a contact body for an electrical switching contact is proposed, in particular for a vacuum interrupter or an air-insulated switch for the medium and / or high voltage range, wherein the contact body consists of a composite material of at least one bound with a concentration in a matrix material, in an x, y, z coordinate system extends, can be fixed on a contact carrier and contacted with another electrical contact body, wherein the concentrations of the incorporated material in the matrix or the material compositions of the composite material in dependence on the spatial position in the contact body to a each x, y, and z coordinate by means of a three-dimensional one executed by a three-dimensional printer
  • Printing method are set individually. Accordingly, a respective concentration of the incorporated material or a respective material composition of the composite material in and on the contact body can be varied as desired.
  • the aim is to realize a metallurgical composition of the material components which satisfies the requirements of the switching contact, and to observe a spatial distribution of the material composition over the surface and depth of the contact body that is as defined as possible.
  • Similar Forde- ments are made to switch contacts in air-insulated switching devices, in particular circuit breakers and slots.
  • an anisotropic spatial distribution of the material composition over the cross-section and the depth of a contact body, which is precisely adapted to the switching requirements, should be able to be generated.
  • blanks of the contact bodies which are, for example, contact disks or contact disk rings
  • 3D printing a three-dimensional printing process
  • the method of 3D printing not only allows a precise production of a plurality of material compositions, but in particular any and thus the switching requirements exactly and flexible to be adapted spatial distribution of the material composition over the surface, the cross section and the depth of the contact body.
  • the contact body at least one arbitrarily shaped, in particular a curved or more or less than six boundary surface (s) having spatial structure with at least one
  • Structure concentration or material composition of the composite material can be generated, which differs from at least one residual concentration or material composition of the composite material of the remaining contact body surrounding the structure.
  • the planar or spatial structure has, in contrast to their spatial environment, a changed concentration of at least one of the materials. Accordingly, at least one physical property unlike the Environment be imprinted in the structure.
  • the two-dimensional or spatial structure in contrast to its surroundings, has different values with respect to at least one physical property.
  • the structure concentration can be created in at least one spatial direction with a gradient.
  • a physical property can thus be created anisotropic.
  • the materials of the composite material can be omitted or not generated depending on the spatial position in and / or on the contact body to form recesses.
  • At least one physical property of mechanical stability and elasticity, electrical conductivity, thermal conductivity, magnetic permeability and electrical and magnetic susceptibility can be set in the contact body by means of the generated concentrations or the material compositions of the material composite produced.
  • the physical property (s) for the contact body can / can Define spreading and / or blocking areas and / or propagation directions of an arc.
  • a mechanical behavior, a suppression of eddy current effects can / can be achieved by means of the generated concentrations of the incorporated material or the material compositions of the material composite produced for the contact body
  • Abbrand , an arc propagation behavior, a Abreissstrom and / or a fixability of the contact body can be adjusted.
  • the composite material of CuCr, WCu, WCCu, WAg or WCAg exist, the bonded material in particular Cr, Cu and / or Ag and the matrix material may be Cu, W and / or WC.
  • the matrix and the material to be incorporated and / or the material composition liquid or powder by means of separate application devices of the three-dimensional printer as layers for the contact body with a respective concentration of the material to be incorporated or the respective material composition of the composite materials are generated as a function of the x, y and z coordinates.
  • the layers can be melted and / or sintered by means of an energy injection, in particular by means of a laser beam or an electron beam.
  • the materials can be mixed with a binder and cured and / or sintered.
  • the layers can be applied to a base consisting of a pure base material or a precipitation-hardened base material.
  • the base material may be pure Cu or Cu with a Cr or Zr admixture, in particular in the range 0.3 to 0.8%.
  • the base can be mechanically surface-structured and / or slotted. This can be done before or after the generation of the layers.
  • different physical properties depending on a spatial position in and on the contact body by changing the concentration of at least one of the embedded materials and / or the material compositions of the composite material locally in a spatial area around a respective x-, y -, z coordinate can be generated.
  • FIG. 1 shows an exemplary embodiment of a vacuum interrupter according to the invention
  • Figure 2 shows an embodiment of two inventive
  • Figure 3 shows an embodiment of an inventive
  • Figure 4 shows an embodiment of a contact body according to the invention
  • FIG. 5 shows an exemplary embodiment of a first concentration profile according to the invention
  • FIG. 6 shows an exemplary embodiment of a second concentration profile according to the invention
  • FIG. 7 shows an exemplary embodiment of a third concentration profile according to the invention
  • FIG. 8 shows an embodiment of a medium-voltage vacuum switch according to the invention
  • Figure 9 shows an embodiment of a method according to the invention.
  • FIG. 1 shows an exemplary embodiment of a vacuum interrupter according to the invention.
  • Reference numeral 1 indicates a contact body according to the invention for an electrical switching contact, which consists of the contact body 1 and a contact carrier 5.
  • This vacuum interrupter 3 has to the contact body 1, which is fixed on the contact carrier 5, a corresponding electrical switching contact, which consists of a corresponding second contact body 1 'and a further contact carrier 5'.
  • the contact body 1 according to the invention can be designed as a fixed contact on an immovable fixed contact pin 7.
  • the further contact body 1 ' is designed as a moving contact, which is fixed on a BewegCountbolzen 9. Accordingly, this BewegCountbolzen 9 is comprised of a beam 11 for providing mobility.
  • the immovable switching contact consists of the contact body 1 and its contact carrier 5. The movable electrical
  • Switching contact consisting of the further contact body 1 'and its contact carrier 5 ⁇ , can be moved to the electrical contact interruption up here, away from the stationary contact body 1.
  • the two electrical switching contacts are additionally encompassed and enclosed by three steam screens 13 and, for example, two ceramic insulators 15.
  • Reference numeral 17 denotes an end cap.
  • FIG. 2 shows an exemplary embodiment of two inventive electrical switching contacts (AMF contacts), which are shown in an opened state, for example, a vacuum interrupter 3.
  • AMF contacts inventive electrical switching contacts
  • FIG. 2 shows an exemplary embodiment of two inventive electrical switching contacts (AMF contacts), which are shown in an opened state, for example, a vacuum interrupter 3.
  • AMF contacts inventive electrical switching contacts
  • a contact body 1 according to the invention is fixed by means of the contact carrier 5 on a fixed contact pin 7.
  • a second contact body 1 'according to the invention is fastened by means of its contact carrier 5' to a movable moving contact pin 9.
  • Switching contact is spaced from the second contact body 1 'of the upper electrical switching contact with a length L B. Likewise hatched, L B represents an arc produced during a separation
  • FIG 3 shows an embodiment of an electrical switching contact according to the invention (AMF contact).
  • the electrical switching contact has a contact body 1 which has been fastened on a contact carrier 5.
  • a contact carrier 5 slits 8 are incorporated.
  • the contact body 1 is fixed by means of the contact carrier 5 on a BewegCountbolzen 9.
  • the upper region of the electrical switching contact may be referred to as a switching system 19.
  • L B an arc or an arc column is shown graphically, which is generated when disconnecting two electrical switching contacts.
  • FIG. 4 shows an exemplary embodiment of a contact body 1 or 1 'according to the invention.
  • FIG. 4 shows a plan view at the top on the contact body 1, below a cross section along the line AB is shown.
  • the contact body 1 has a spatial extent along a vertical axis extending through a center M and a radial spatial extent thereto.
  • the contact body 1 or 1 'according to the invention consists of a composite material of different materials, for example, a concentration of one of the materials of the composite material, and thus the material composition of the composite material in a function of a spatial Liehe position and thus changeable in and on the contact body 1 means a three-dimensional printing process is created.
  • a contact body 1 according to the invention may have different physical properties as a function of a position in and on the contact body 1.
  • the concentration of, for example, a material in the material composition of the plant composite in dependence on the axial h and / or the radial r-position of the material in the contact body 1 with respect to the vertical axis H of the contact body 1 can be created.
  • a contact body 1 according to the invention can be produced in particular as a contact disk or a contact ring disk.
  • the variability of the concentration of, for example, a material of the plant network can be used to form at least one physical property with a gradient in a respective spatial direction.
  • concentrations of material compositions in the composite material can thus also be used to produce recesses.
  • With the aid of the method of three-dimensional printing it is possible to generate entirely new properties of contacts or of contact bodies 1, which can be produced with conventional methods are not available. This includes in particular the generation of two- or three-dimensional structures in the contact body 1 with different physical properties.
  • locally or locally selectively structures with a particularly high or low electrical or even thermal conductivity can be generated by the inventive possibility of changing the material composition, which can also have targeted gradients in different spatial directions.
  • admixtures which have a positive effect on burning behavior and arc propagation behavior and tear-off currents, without their possible negative effects on other properties, which can be mechanical, electrical or thermal, affecting the contact volume.
  • These admixtures are only in those areas in which a spread of the arc is desired. If appropriate, in regions in which no arc should occur, for example in the edge regions of the contact body or of the electrical switching contact, other admixtures may be mixed locally defined near the surface, which hinder the propagation of the arc there.
  • the copper concentration in copper-based contacts can have virtually any desired gradient to define the electrical conduction and heat conduction anisotropically.
  • the solderability or the connection technology of contacts or contact bodies 1 can also be locally optimized in a targeted manner.
  • connection area already a thin layer of silver or other materials favorable for the respective connection technology, defined by means of 3D printing and material-saving introduced.
  • areas with high permeability can be created within the contact piece or within the contact body 1, which allow the arc LB to be specifically influenced, especially in vacuum interrupters 3, without making negative effects, for example, of an iron body noticeable .
  • Particularly advantageous very fine mechanical structures can be produced, for example, grooves, curved slots, phases and the like, which require no or only a very small amount of post-processing, resulting in a significant cost savings compared to today's methods.
  • FIG. 5 shows an exemplary embodiment of a first concentration profile according to the invention.
  • FIG. 5 shows a Cr concentration in% over a radial position r in mm.
  • the x-axis represents the radial distance r according to FIG. 4 again.
  • FIG. 5 shows a chromium concentration profile of a CuCr contact body 1 on a contact surface as a function of the radial position r.
  • the horizontal line of 40% Cr concentration represents the state of the art.
  • the dashed line arranged underneath represents an example of a profile according to the invention.
  • the Cr concentration is changed as a function of the spatial position in the contact body 1.
  • this may alternatively have three or four different materials whose respective concentration can be changed depending on a spatial position in and on the contact body 1.
  • the Cr concentration starting from the vertical axis H, has been made radially outward with the radius r to be larger. In this case, this increase in the concentration of Cr can be created at the surface of the contact body 1 facing the further electrical switching contact.
  • the Cr concentration at the position of the vertical axis H is greater than 0, here 10%.
  • the Cr concentration is constant in an initial region and in an end region of the radius r. In the beginning this is 10% and in the end this is 40%. According to FIG.
  • the values of the Cr concentration, starting from the value in the initial region, are converted into the value of the end region of the radius r in the form of an S curve.
  • the initial range is in the range of 0 to about 5 mm.
  • the end area is approximately between 23 and 40 mm.
  • FIG. 6 shows an exemplary embodiment of a second concentration profile according to the invention.
  • a Cr concentration in% is plotted against an axial position h in mm.
  • the highest Cr concentration is achieved in each case on the surface of the contact body facing the other contact body 1 'or 1.
  • FIG. 6 shows that the Cr concentration of a CuCr material composite, starting from a first surface of the contact body 1 that is perpendicular to the vertical axis H, is made larger with increasing axial distance H.
  • the Cr concentration with the increasing distance h is created to be linearly increasing.
  • any desired material compositions can be provided as a function of a radius r or a height H. It is particularly simple if only one component is spatially changed in its concentration in relation to the entire material composition of the composite material. In principle, with multiple material composites also three or four Components are changed with their respective concentrations depending on their spatial position.
  • FIG. 6 shows that the Cr concentration at the first surface of the contact body 1 is equal to zero.
  • FIG. 7 shows an exemplary embodiment of a third concentration profile according to the invention.
  • the illustration according to FIG. 7 corresponds to that of FIG. 6, with the difference that the contact body 1 has a 2.5 mm thick copper base plate.
  • the Cr concentration is maximum here as well on the second surface of the contact body 1.
  • the horizontal curves of 40% of CR concentration according to FIGS. 6 and 7 represent conventional profiles that are constant over a radius r and a height h.
  • FIG 8 shows an embodiment of a medium-voltage vacuum switch according to the invention in a side view.
  • the vacuum circuit breaker 21 comprises a vacuum interrupter 3, which makes an electrical line contact by means of a switching drive 23 or separates it. Between the vacuum interrupter 3 and the switch drive 23 electrical insulators 25 are formed.
  • FIG. 9 shows an exemplary embodiment of a method according to the invention.
  • a three-dimensional printing process which is carried out by a three-dimensional printer
  • three-dimensional structures can be printed in layers, such as a contact body according to the invention 1.
  • the contact body 1 with a respective concentration of at least one of the materials of WerkstoffVerbundes in Dependent on a spatial position changeable, be generated.
  • This variable availability of this concentration allows for the formation of a chigen or spatial structure in and / or on the contact body.
  • This planar or spatial structure then differs in at least one physical property of its environment. Likewise, this physical property can be generated with a gradient in a respective spatial direction, so that anisotropy can be generated for the contact body 1.
  • variable availability of material concentrations also refers to omitting the corresponding material.
  • recesses can be easily and energy-efficiently generated.
  • the materials of the composite material can be produced in liquid or powder form by means of separate application devices of a 3D printer as layers as a function of a spatial position in and on the contact body with a desired mixing ratio for adjusting the concentration (s).
  • the layers can be fused by means of an energy impression in a second step S2 and / or sintered in a further step S3.
  • a generated print blank can be recompressed.
  • Printing not only allows a precise production of a large number of material compositions, but in particular an arbitrary and thus required physical properties of spatial distribution of the material composition in and on the contact body 1 to be adapted precisely and flexibly. Moreover, time-consuming and cost-intensive printing can be achieved by means of three-dimensional printing Save processing steps of mechanical surface structuring and slitting.
  • the pulverulent, in particular metallic, starting material is mixed with a small amount of binder in order, after it has hardened, to give the printing blank sufficient strength for further handling. Then you can the blank are post-compacted, for example by means of isostatic pressing. It can be performed in a further process step, a sintering and possibly a recompression.
  • Three-dimensional printing is a method of constructing three-dimensional workpieces.
  • the structure is computer-controlled from one or more liquid or powdery materials according to predetermined dimensions and shapes, is thus computer aided design, (CAD), i. computer aided design.
  • CAD computer aided design
  • Typical materials for 3D printing are plastics, synthetic resins, ceramics and / or metals.
  • the method not only serves to produce individual prototypes, but also mass production of parts, in particular contact bodies 1.
  • 3D printing has the advantage that the loss of material is largely eliminated. Most of the time the process is energetically cheaper, because the material is only once built up in the required size and mass. In connection with the production of contact materials and the production of contact bodies 1, a 3D printing process is completely new.
  • a variable chromium concentration in the axial direction is achieved by using a 2-component 3D pressure, in which the powdery starting materials copper (Cu) and chromium (Cr) are applied in layers by separate application devices in that locally or locally the desired mixing ratio, namely the concentration, arises, analogously to a multicolor ink-jet printer.
  • the layers are respectively sintered or fused according to the state of the art via a sufficiently high energy input, for example via a focused laser or an intense electron beam.
  • the base disk may already have the necessary for reducing eddy currents slit 8, for example by means of punching, said slit 8, according to Figure 4, is continued by means of 3D printing in the additionally applied contact layer of the contact body 1.
  • a material composition here means the constituents from which the composite material is formed, the constituents being qualitatively different substances from one another.

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  • Manufacturing & Machinery (AREA)
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Abstract

L'invention concerne un procédé de fabrication d'un corps de contact (1, 1'), et ledit corps de contact (1, 1') pour un contact de commande électrique, en particulier pour un interrupteur à vide (3) ou un commutateur isolé par air pour la plage de moyenne et/ou de haute tension. Le corps de contact (1; 1') est constitué d'un composite d'au moins une matière intégrée dans une matrice selon une certaine concentration, s'étend dans un système de coordonnées x, y, z, peut être fixé sur un support (5) de contact et peut être mis en contact avec un autre corps de contact électrique (1'; 1). Les concentrations du matériau intégré dans la matrice et/ou les compositions du matériau composite sont produites individuellement en fonction de la position dans l'espace dans le corps de contact (1, 1') autour de chaque coordonnée x, y z au moyen d'un procédé d'impression tridimensionnel exécuté par une imprimante à trois dimensions.
PCT/EP2015/057032 2014-05-22 2015-03-31 Corps de contact électrique et fabrication de ce dernier par impression 3d Ceased WO2015176859A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014209762.2 2014-05-22
DE102014209762.2A DE102014209762A1 (de) 2014-05-22 2014-05-22 Elektrischer Kontaktkörper und dessen Herstellung mittels 3D-Druck

Publications (1)

Publication Number Publication Date
WO2015176859A1 true WO2015176859A1 (fr) 2015-11-26

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WO (1) WO2015176859A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016002052A1 (de) * 2015-12-18 2017-06-22 Liebherr-Components Biberach Gmbh Schaltschrank sowie Verfahren zu dessen Herstellung
DE102018202187A1 (de) 2018-02-13 2019-08-14 Siemens Aktiengesellschaft Strompfadteil für ein elektrisches Schaltgerät
EP4456108A1 (fr) 2023-04-26 2024-10-30 Abb Schweiz Ag Matériau composé de cuivre

Citations (5)

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Publication number Priority date Publication date Assignee Title
DE2263777A1 (de) * 1971-12-28 1973-07-05 Ciraud Leone Isaure Marie Verfahren und vorrichtung zur herstellung beliebiger gegenstaende aus beliebigem schmelzbarem material
DE19605097A1 (de) * 1995-02-10 1996-08-14 Furukawa Electric Co Ltd Eingekapseltes Kontaktmaterial und Herstellungsverfahren für dieses und Herstellungsverfahren und Verwendungsverfahren für einen eingekapselten Kontakt
DE19650752C1 (de) * 1996-12-06 1998-03-05 Louis Renner Gmbh Kupfer-Chrom-Kontaktwerkstoff mit feinkörnig umgewandelter Oberfläche für elektrische Schaltkontakte und Verfahren zu dessen Herstellung
DE19827667A1 (de) * 1998-06-22 1999-12-30 Moeller Gmbh Schaltkontaktanordnung
WO2006111175A1 (fr) * 2005-04-16 2006-10-26 Abb Technology Ag Procede de production de plots de contact pour chambres de commutation a vide

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004031887B3 (de) * 2004-06-30 2006-04-13 Siemens Ag Schaltkontakt für Vakuumschaltröhren
DE102012219989B4 (de) * 2012-10-31 2016-09-29 WZR ceramic solutions GmbH Druckverfahren zur Herstellung eines Grünkörpers, Grünkörper und keramischer Formkörper

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2263777A1 (de) * 1971-12-28 1973-07-05 Ciraud Leone Isaure Marie Verfahren und vorrichtung zur herstellung beliebiger gegenstaende aus beliebigem schmelzbarem material
DE19605097A1 (de) * 1995-02-10 1996-08-14 Furukawa Electric Co Ltd Eingekapseltes Kontaktmaterial und Herstellungsverfahren für dieses und Herstellungsverfahren und Verwendungsverfahren für einen eingekapselten Kontakt
DE19650752C1 (de) * 1996-12-06 1998-03-05 Louis Renner Gmbh Kupfer-Chrom-Kontaktwerkstoff mit feinkörnig umgewandelter Oberfläche für elektrische Schaltkontakte und Verfahren zu dessen Herstellung
DE19827667A1 (de) * 1998-06-22 1999-12-30 Moeller Gmbh Schaltkontaktanordnung
WO2006111175A1 (fr) * 2005-04-16 2006-10-26 Abb Technology Ag Procede de production de plots de contact pour chambres de commutation a vide

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