EP1875481A1 - Verfahren zur herstellung von kontaktstücken für vakuumschaltkammern - Google Patents
Verfahren zur herstellung von kontaktstücken für vakuumschaltkammernInfo
- Publication number
- EP1875481A1 EP1875481A1 EP05737216A EP05737216A EP1875481A1 EP 1875481 A1 EP1875481 A1 EP 1875481A1 EP 05737216 A EP05737216 A EP 05737216A EP 05737216 A EP05737216 A EP 05737216A EP 1875481 A1 EP1875481 A1 EP 1875481A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- powder
- contact
- contact piece
- mixture
- slots
- 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
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 29
- 239000000843 powder Substances 0.000 claims abstract description 28
- 238000005245 sintering Methods 0.000 claims abstract description 18
- 238000010310 metallurgical process Methods 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims description 21
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 13
- 238000003825 pressing Methods 0.000 claims description 11
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 9
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 8
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 5
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 5
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 5
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 4
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims description 4
- 239000011733 molybdenum Substances 0.000 claims description 4
- 229910052763 palladium Inorganic materials 0.000 claims description 4
- 229910052697 platinum Inorganic materials 0.000 claims description 4
- 229910052709 silver Inorganic materials 0.000 claims description 4
- 239000004332 silver Substances 0.000 claims description 4
- 229910052721 tungsten Inorganic materials 0.000 claims description 4
- 239000010937 tungsten Substances 0.000 claims description 4
- 229910052727 yttrium Inorganic materials 0.000 claims description 4
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims description 4
- 229910052726 zirconium Inorganic materials 0.000 claims description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 238000012876 topography Methods 0.000 claims description 3
- 238000004663 powder metallurgy Methods 0.000 claims 1
- 238000002360 preparation method Methods 0.000 claims 1
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 238000000137 annealing Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
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
- B22F3/12—Both compacting and sintering
-
- 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
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
-
- 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
- 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
-
- 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
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49105—Switch making
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/53—Means to assemble or disassemble
- Y10T29/5313—Means to assemble electrical device
- Y10T29/532—Conductor
- Y10T29/53204—Electrode
Definitions
- the invention relates to a method for the production of contact pieces for vacuum interrupters of low, medium and high voltage switch chambers, in which the contact pieces is provided with running from the contact center area to the edge slots, and a contact piece itself, as well as a contact piece itself, according to the preamble of claims and 12.
- the subject area relates to low, medium voltage, high voltage and generator switching devices, which are upgraded with vacuum interrupters.
- Vacuum switch chambers are predominantly equipped with a radial magnetic field contact system (RMF).
- the radial magnetic field is generated by coil sickle segments.
- the sickle elements are created by slots which are incorporated in a contact piece plate.
- a slotted contact pot which generates the radial magnetic field on a circular ring surface.
- slots may also be required and incorporated.
- slits in a contact plate are usually also required when using AMF contact systems.
- RMF contact systems are the low current path resistance of the overall arrangement using a contact pressure force (simple system).
- RMF contact pieces are used with a cylindrical disk shape whose outer edges are rounded to improve the dielectric properties.
- the outer geometry is accordingly applied by a turning operation and the slots are introduced into the contact piece by sawing or milling.
- a stamping process can also be used.
- a use of multilayer contact blanks and contact pieces, which consist of several layers, are known in the patent literature, according to DE 3840192 A1.
- a switching contact arrangement for electrical vacuum interrupters is disclosed, the slotted contacts are constructed of several, superimposed discs, the individual discs were previously slotted by punching.
- the material thickness of the slices should not be greater than the slit width is selected for a perfect punching.
- the known method for introducing the slots is a Zerspantechnisches method, generating the slots is made per contact piece. This also applies to the application of an external contact geometry. The geotechnical generation of the contact piece geometry is naturally associated with corresponding costs.
- the invention is therefore an object of the invention to improve a method for the production of contact pieces in vacuum interrupters, as well as a contact piece of the generic type to the effect that the manufacturing process itself is significantly easier, and the contact meets the highest functional requirements.
- the stated object is achieved according to the invention in a method of the generic type by the characterizing features of claim 1.
- a necessary and inventive tool for producing such a contact piece is specified in claim 11
- the aim of the considerations is an introduction of the slots or the application of a contact outer contour directly in the powder metallurgical manufacturing process of the contact material.
- the costs for generating the contact piece geometry can be partially or completely avoided.
- a further cost saving is achieved by reducing the required powder material use, eliminates the material volume of the slots, as well as possibly the usually necessary excess.
- the cited prior art describes a multilayer contact which has the characteristics of the MLC contact piece, but is not produced by a molten process, but the two layers are joined together by soldering.
- the core of the method according to the invention is therefore that the contact pieces are produced close to final contour and near final dimensions in a powder metallurgical process in which the said slots are already introduced into the green compact and fixed during the subsequent sintering.
- the slots may be open towards the edge outward, or be designed as starting and ending within the contact surface slots
- the powder material consists of a mixture of chromium powder and copper powder for the entire contact piece cross-section.
- a first green compact consisting of pure copper powder and then a green compact consisting of a mixture of chromium powder and copper powder are produced by pressing, and the two green compacts are then separated or sintered together sintered.
- the different green compacts are produced one after the other in this embodiment.
- the contact piece can subsequently be brought to the desired dimensions again for calibration in a pressing process.
- the particle size of the powder particles is preferably selected between> 0 and 150 microns.
- a sintering of the contact pieces should preferably take place under a high-vacuum atmosphere.
- the sintering of the components can be carried out under a hydrogen atmosphere (reducing atmosphere), optionally with a subsequent heat treatment of the components under a high-vacuum atmosphere.
- the heat treatment is carried out synchronously with the production steps of a vacuum interrupter chamber. This saves considerable time and reduces the production costs, since the finished vacuum interrupter chamber contains the said contact pieces.
- the metallic materials are thermally tempered (especially the contact material) and a vacuum atmosphere is set at the same time.
- the invention consists in creating slots in the green body by contours, which are introduced into the mold or into the press dies containing the press molds as corresponding positive mold profiles (topographies).
- the invention consists in that the contact pieces are produced close to final contour and final dimensions in a powder metallurgical process in which the said slots are already introduced into the green compact and fixed during the subsequent sintering.
- the contact piece is a multilayer contact piece.
- additives can be used, such as tungsten and / or tungsten carbide, and / or molybdenum, and / or platinum, and / or zirconium, and / or yttrium, and / or palladium and / or silver in the powder mixture or used as an alloyed powder mixture ,
- FIG. 2 Press molds with molded-in positive molding profiles (topographies) for slit formation in the green bodies
- the production of a ready-to-install contact piece can be achieved by choosing a powder-metallurgical production process in the following way:
- FIG. 1 shows the finished contact piece (1) after production with inserted slots (2).
- FIG. 2 shows the pressing tool (1) which has recesses (2) as well as the slot tracks (3).
- the slit strips (3) can be movably mounted in the pressing tool (1). If the pressing tool (1), taking into account the shrinkage (after sintering of the green compact), is made smaller in size, it can be used as a sizing press tool.
- the powder mixture After mixing the powders copper and chromium, the powder mixture is placed in a mold which, in addition to the required upper and lower punches, also supports the webs on e.g. a stamp page included. There might be a need for the webs to be movable as well, e.g. arranged in the stamp.
- the two punches are in turn so designed that the outer geometry is impressed at the same time when pressing the powder mixture together with the slots on the resulting green compact.
- the sintering of the greenware contact pieces can be carried out as usual under a vacuum and / or a hydrogen atmosphere.
- a reducing atmosphere may be present during the production of a ready-to-install contact piece (heat treatment annealing). After this reducing process step may then be advantageous to reduce the H 2 gas content in the material then a heat treatment under a "pure" vacuum atmosphere.
- the contact piece can be calibrated in a further pressing process and thus brought to its final dimension.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
- Manufacture Of Switches (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2005/004063 WO2006111175A1 (de) | 2005-04-16 | 2005-04-16 | Verfahren zur herstellung von kontaktstücken für vakuumschaltkammern |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1875481A1 true EP1875481A1 (de) | 2008-01-09 |
Family
ID=35453541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05737216A Ceased EP1875481A1 (de) | 2005-04-16 | 2005-04-16 | Verfahren zur herstellung von kontaktstücken für vakuumschaltkammern |
Country Status (4)
| Country | Link |
|---|---|
| US (2) | US20090145883A1 (de) |
| EP (1) | EP1875481A1 (de) |
| CN (1) | CN101164130A (de) |
| WO (1) | WO2006111175A1 (de) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1997574A1 (de) * | 2007-06-01 | 2008-12-03 | ABB Technology AG | Verfahren zur Herstellung eines Kontaktteils für eine Schaltanlage sowie eines Kontaktteils an sich |
| AT11814U1 (de) * | 2010-08-03 | 2011-05-15 | Plansee Powertech Ag | Verfahren zum pulvermetallurgischen herstellen eines cu-cr-werkstoffs |
| EP3754684A1 (de) * | 2012-06-11 | 2020-12-23 | ABB Schweiz AG | Vakuumunterbrecher mit doppelter koaxialkontaktanordnung auf jeder seite |
| JP6051142B2 (ja) * | 2013-10-23 | 2016-12-27 | 株式会社日立製作所 | 真空バルブ用電気接点およびその製造方法 |
| GB2524811B (en) | 2014-04-03 | 2017-01-18 | Siemens Healthcare Ltd | A pressure limiting valve for a cryostat containing a cryogen and a superconducting magnet |
| DE102014209762A1 (de) * | 2014-05-22 | 2015-11-26 | Siemens Aktiengesellschaft | Elektrischer Kontaktkörper und dessen Herstellung mittels 3D-Druck |
| US9922777B1 (en) * | 2016-11-21 | 2018-03-20 | Eaton Corporation | Vacuum switching apparatus and electrical contact therefor |
| US10410813B1 (en) * | 2018-04-03 | 2019-09-10 | Eaton Intelligent Power Limited | Vacuum switching apparatus and electrical contact therefor |
| DE102021210839A1 (de) | 2021-09-28 | 2023-03-30 | Siemens Aktiengesellschaft | Herstellungsverfahren für einen Kontaktkörper einer Vakuumschaltröhre, Kontaktkörper für eine Vakuumschaltröhre und Vakuumschaltröhre mit einem solchen Kontaktkörper |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1013433B (de) * | 1955-10-08 | 1957-08-08 | Deutsche Edelstahlwerke Ag | Verfahren zur Herstellung von Hartmetallformkoerpern |
| DD156227A5 (de) * | 1981-02-11 | 1982-08-11 | Mtu Muenchen Gmbh | Verfahren zur pulvermetallurgischen herstellung von bauteilen |
| DE19612143A1 (de) * | 1996-03-27 | 1997-10-02 | Abb Patent Gmbh | Verfahren zur Herstellung eines Spiralkontaktstückes für eine Vakuumkammer und Vorrichtung zur Durchführung des Verfahrens |
| EP1130608A2 (de) * | 2000-03-04 | 2001-09-05 | Metalor Contacts Deutschland GmbH | Verfahren zum Herstellen eines Kontaktwerkstoffes für Kontaktstücke für Vakuumschaltgeräte sowie Kontaktwerkstoff und Kontaktstücke hierfür |
| EP1437751A1 (de) * | 2003-01-09 | 2004-07-14 | Hitachi, Ltd. | Elektrode für Vakuumschalter, Vakuumschalter mit einer solchen Elektrode |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5837102A (ja) * | 1981-08-29 | 1983-03-04 | Sumitomo Electric Ind Ltd | 粉末部品の製法 |
| JP2768721B2 (ja) * | 1989-03-01 | 1998-06-25 | 株式会社東芝 | 真空バルブ用接点材料 |
| DE58905069D1 (de) * | 1989-05-31 | 1993-09-02 | Siemens Ag | Verfahren zur herstellung eines cucr-kontaktwerkstoffes fuer vakuumschuetze sowie zugehoeriger kontaktwerkstoff. |
| JPH04505985A (ja) * | 1989-05-31 | 1992-10-15 | シーメンス アクチエンゲゼルシヤフト | 真空スイツチ用CuCr接触片の製法並びに付属接触片 |
| DE19537657A1 (de) * | 1995-10-10 | 1997-04-17 | Abb Patent Gmbh | Verfahren und Vorrichtung zur Herstellung eines Kontaktstückes |
| US6437275B1 (en) | 1998-11-10 | 2002-08-20 | Hitachi, Ltd. | Vacuum circuit-breaker, vacuum bulb for use therein, and electrodes thereof |
| JP4759987B2 (ja) * | 2004-11-15 | 2011-08-31 | 株式会社日立製作所 | 電極および電気接点とその製法 |
-
2005
- 2005-04-16 CN CNA2005800494689A patent/CN101164130A/zh active Pending
- 2005-04-16 US US11/918,045 patent/US20090145883A1/en not_active Abandoned
- 2005-04-16 WO PCT/EP2005/004063 patent/WO2006111175A1/de not_active Ceased
- 2005-04-16 EP EP05737216A patent/EP1875481A1/de not_active Ceased
-
2010
- 2010-10-07 US US12/900,114 patent/US20110247997A1/en not_active Abandoned
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1013433B (de) * | 1955-10-08 | 1957-08-08 | Deutsche Edelstahlwerke Ag | Verfahren zur Herstellung von Hartmetallformkoerpern |
| DD156227A5 (de) * | 1981-02-11 | 1982-08-11 | Mtu Muenchen Gmbh | Verfahren zur pulvermetallurgischen herstellung von bauteilen |
| DE19612143A1 (de) * | 1996-03-27 | 1997-10-02 | Abb Patent Gmbh | Verfahren zur Herstellung eines Spiralkontaktstückes für eine Vakuumkammer und Vorrichtung zur Durchführung des Verfahrens |
| EP1130608A2 (de) * | 2000-03-04 | 2001-09-05 | Metalor Contacts Deutschland GmbH | Verfahren zum Herstellen eines Kontaktwerkstoffes für Kontaktstücke für Vakuumschaltgeräte sowie Kontaktwerkstoff und Kontaktstücke hierfür |
| EP1437751A1 (de) * | 2003-01-09 | 2004-07-14 | Hitachi, Ltd. | Elektrode für Vakuumschalter, Vakuumschalter mit einer solchen Elektrode |
Non-Patent Citations (1)
| Title |
|---|
| See also references of WO2006111175A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101164130A (zh) | 2008-04-16 |
| US20090145883A1 (en) | 2009-06-11 |
| US20110247997A1 (en) | 2011-10-13 |
| WO2006111175A1 (de) | 2006-10-26 |
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