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WO2001080260A1 - Contact de commutation electrique et son procede de fabrication - Google Patents

Contact de commutation electrique et son procede de fabrication Download PDF

Info

Publication number
WO2001080260A1
WO2001080260A1 PCT/EP2001/003425 EP0103425W WO0180260A1 WO 2001080260 A1 WO2001080260 A1 WO 2001080260A1 EP 0103425 W EP0103425 W EP 0103425W WO 0180260 A1 WO0180260 A1 WO 0180260A1
Authority
WO
WIPO (PCT)
Prior art keywords
contact
sintered structure
switch contact
switching contact
switching
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/EP2001/003425
Other languages
German (de)
English (en)
Inventor
Wolfgang Kremers
Wolfgang Erven
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.)
Eaton Industries GmbH
Original Assignee
Moeller GmbH
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 Moeller GmbH filed Critical Moeller GmbH
Publication of WO2001080260A1 publication Critical patent/WO2001080260A1/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
    • 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
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H01H1/021—Composite material

Definitions

  • the invention relates to an electrical switch contact according to the preamble of claim 1 and a method for its production according to claim 7, in particular for electrical low-voltage switching devices.
  • Switch contacts consist of a contact carrier and at least one contact piece.
  • the contact piece is subject to high requirements regarding the material properties. Exemplary requirements are low contact resistance and high arc erosion resistance.
  • Contact carrier and contact piece are usually connected by soldering according to EP-A 0 540 186 and / or welding according to DE-A 43 31 913 and / or riveting according to DE-A 197 40 022, screwing, shrinking or by combining these methods.
  • the disadvantage here is the high manufacturing costs for producing a complete switching contact. For example, for a double-interrupting switching contact with two opposing contact pieces, five mechanical components must be connected to one another, with great efforts being made to avoid positional deviations. It must also be taken into account that not all desired material combinations between the contact carrier and contact piece can be welded and / or soldered.
  • DE-A 195 37 657 describes a method and a device for producing a switching contact with a contact carrier from an electrical well-conductive, first material and a contact piece made of an electrically less conductive, but erosion-resistant, second material, in which the contact piece has a sintered structure impregnated with the material of the contact carrier.
  • the contact carrier and the sintered structure are placed one above the other in a cup-like shape made of steel or stainless steel, in which they are heated to above the melting temperature of the first material, but still below the melting temperature of the second material, so that the first material melts and penetrates into the sintered structure.
  • the sintered structure is produced by sprinkling the second material in powder form onto the first material and first sintering in a degassing process below the melting temperature of the first material.
  • the sintered structure is produced beforehand and placed on the contact carrier as a green compact. This method is also too complex and not well suited for all material combinations.
  • the invention is therefore based on the object of simplifying the production of switch contacts.
  • the switch contact according to the invention in the form of a one-piece sintered body consists of two materials which can be of different materials. Due to the freely selectable combination of the first material and the second material in a considerably expanded range, the contact piece suffices largely independently of its geometrical shape - in particular mechanical, thermal electrical and magnetic - requirements through correspondingly selectable material properties for the contact carrier and for the at least one contact piece.
  • the switching piece according to the invention can be used to achieve opposing or in some cases difficult to combine properties, such as high strength, low weight and high conductivity.
  • Third materials can advantageously also be integrated in the contact carrier or the contact piece in order to achieve further properties.
  • the third materials can be sintered materials or non-sinterable materials.
  • the switching contact can be given special magnetic properties, for example, by an insert made of ferromagnetic sintered material embedded in the contact carrier. This can be used to advantage, for example, for rapid arc displacement in an opening contact system which is equipped with such a switching contact.
  • the switching contact can be given special properties, for example, by a third material with a lattice-like lattice structure - for example, high strength by a ceramic insert in the contact carrier, low weight by a plastic insert, or high strength and ferromagnetism by a steel insert.
  • the manufacturing method according to the invention realizes a complete switching contact with a few manufacturing steps, in particular with a single sintering process for the first and the second material.
  • the method provides a switch contact that meets all tolerance requirements in its external dimensions and in the relative arrangement of contact carrier and contact piece (s) and in its other properties, such as mechanical, thermal, electrical and magnetic properties, a wide variety of requirements.
  • a third material in the form of a sinterable powder or in the form of an already structured, separate body can advantageously be integrated with the switching contact.
  • Pre-compaction of the sinterable materials is generally common. Pre-compaction can be carried out separately for each material, one after the other after each material has been introduced or together after all materials have been introduced.
  • the switching contact can be solidified and / or brought into the dimensionally accurate shape with a recompression.
  • Figure 1 in a first embodiment as a bridge contact
  • FIG. 2 in a second embodiment with an insert made of a ferromagnetic sintered material
  • Figure 3 in a third embodiment with an insert made of a ceramic body with a lattice structure.
  • the switch contact 10 consists of a bridge-shaped contact carrier 11 and two contact pieces 12 at the end.
  • a sinterable, powdery second material is introduced into two troughs 2 of a molding tool 1 and cold-compressed, then the molding tool 1 filled with a sinterable, powder-like first material and the second material and, inevitably, the first material repeatedly cold pre-compressed.
  • these materials are connected to the switch contact 10.
  • cold recompression of the switching contact 10 is recommended for dimensionally accurate completion.
  • the two materials then each have sintered structures which flow into one another in the transition zone 13.
  • the first material is based, for example, on a copper or aluminum powder, as a result of which the resulting contact carrier 11 has sufficient mechanical strength, good electrical and thermal conductivity and, in the case of aluminum, a low weight.
  • the second material is based, for example, on a powder or a powder mixture of tungsten, silver, carbon, nickel, rhenium and / or their oxides, carbides, silicides, nitrides, as a result of which the resulting contact pieces 12 have a low contact resistance and a high arc erosion resistance ,
  • the switch contact 20 according to FIG. 2 additionally has an insert 24 embedded in the contact carrier 21 compared to the switch contact 10 according to FIG. 1.
  • the second material is again introduced into the recesses of the molding tool, a first layer of the first material is placed over it, leaving a recess, this recess is filled with a sinterable, powdery third material and with a second layer of the the first material filled the mold. In between, these materials are pre-compacted.
  • the switch contact 20 is finished true to size, the sintered structure of the third material merging into the sintered structure of the first material in a transition zone.
  • the third material is e.g. starting from a ferromagnetic powder, whereby the insert 24 formed from the third material gives the contact carrier 21 ferromagnetic properties.
  • the switch contact 30 according to FIG. 3 additionally has a separate body 34 embedded in the contact carrier 31 compared to the switch contact 10 according to FIG. 1.
  • the second material is again introduced into the recesses of the molding tool, a first layer of the first material is placed over it, the separate body 34 is placed thereon and around it, as well as with a second layer of the first Material filled the mold. In between, the second and first material are pre-compressed again. In a subsequent single sintering process, possibly with subsequent post-compression, the switch contact 30 is finished true to size, with only the first and the second material being involved in the sintering process. The third material is not changed in the sintering process.
  • the separate body 34 consisting of the third material has a lattice-like lattice structure, for example made of ceramic, plastic or steel, as a result of which the contact carrier 31 equipped therewith has a considerably improved mechanical strength and a reduced weight and, in the case of steel, additionally has ferromagnetic properties.
  • the present invention is not limited to the embodiments described above, but also encompasses all embodiments having the same effect in the sense of the invention.
  • the invention can be applied both to movable and to fixed switching contacts, to pivotable one-sided or double-sided switching contacts or to switching contacts with an additional arcing contact piece.
  • the invention is also suitable for switch contacts, the contact pieces of which consist of more than one material, the additional third material having a sintered structure or forming a separate body and being able to be part of the contact piece alone or both part of the contact piece and the contact carrier.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Switches (AREA)
  • Contacts (AREA)
  • Powder Metallurgy (AREA)

Abstract

L'invention concerne un contact de commutation électrique (10) comprenant un porte-contact (11) en un premier matériau, et au moins un élément de contact (12) en un second matériau de structure frittée. Le premier matériau présente également une structure frittée qui, dans une zone de transition liquide, se transforme en la structure frittée du second matériau. L'invention concerne en outre un procédé de fabrication d'un tel contact de commutation électrique (10). Le premier et le second matériau frittables sont introduits, superposés, sous forme de poudre, respectivement, dans un outil de formage en forme générale de godet (1), puis amenés par frittage, sous la forme définitive du contact de commutation (10).
PCT/EP2001/003425 2000-04-18 2001-03-27 Contact de commutation electrique et son procede de fabrication Ceased WO2001080260A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10019121.5 2000-04-18
DE2000119121 DE10019121A1 (de) 2000-04-18 2000-04-18 Elektrischer Schaltkontakt und Verfahren zu dessen Herstellung

Publications (1)

Publication Number Publication Date
WO2001080260A1 true WO2001080260A1 (fr) 2001-10-25

Family

ID=7639130

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2001/003425 Ceased WO2001080260A1 (fr) 2000-04-18 2001-03-27 Contact de commutation electrique et son procede de fabrication

Country Status (2)

Country Link
DE (1) DE10019121A1 (fr)
WO (1) WO2001080260A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015091883A1 (fr) * 2013-12-18 2015-06-25 Eaton Industries (Austria) Gmbh Pont de commutation pour appareil de commutation

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104766770B (zh) 2014-01-07 2017-09-08 西门子公司 断路器的静触头支架及其断路器
DE102018202187A1 (de) 2018-02-13 2019-08-14 Siemens Aktiengesellschaft Strompfadteil für ein elektrisches Schaltgerät

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3094585A (en) * 1951-04-16 1963-06-18 Garlock Inc Fluorocarbon resin mixtures and metal to plastic bonding
US3538550A (en) * 1966-01-03 1970-11-10 Duerrwaechter E Dr Doduco Partitioned mold die
US4222167A (en) * 1977-04-28 1980-09-16 Siemens Aktiengesellschaft Method of manufacturing a contact bridge
DE19537657A1 (de) * 1995-10-10 1997-04-17 Abb Patent Gmbh Verfahren und Vorrichtung zur Herstellung eines Kontaktstückes
DE19822469A1 (de) * 1997-05-22 1998-11-26 Hitachi Ltd Verfahren zur Herstellung von Verbundwerkstoff für Schaltröhren

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE58904983D1 (de) * 1988-04-20 1993-08-26 Siemens Ag Sinterkontaktwerkstoff auf silberbasis zur verwendung in schaltgeraeten der energietechnik, insbesondere fuer kontaktstuecke in niederspannungsschaltern.
DE19523922A1 (de) * 1995-04-26 1996-10-31 Duerrwaechter E Dr Doduco Verfahren zum pulvermetallurgischen Herstellen von Werkstoffen für elektrische Kontakte, welche Silber und ein oder mehrere Metalloxide enthalten
DE19601612A1 (de) * 1996-01-18 1997-07-24 Wickmann Werke Gmbh Verfahren zum Befestigen eines ersten Teils aus Metall oder Keramik an einem zweiten Teil aus Metall oder Keramik

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3094585A (en) * 1951-04-16 1963-06-18 Garlock Inc Fluorocarbon resin mixtures and metal to plastic bonding
US3538550A (en) * 1966-01-03 1970-11-10 Duerrwaechter E Dr Doduco Partitioned mold die
US4222167A (en) * 1977-04-28 1980-09-16 Siemens Aktiengesellschaft Method of manufacturing a contact bridge
DE19537657A1 (de) * 1995-10-10 1997-04-17 Abb Patent Gmbh Verfahren und Vorrichtung zur Herstellung eines Kontaktstückes
DE19822469A1 (de) * 1997-05-22 1998-11-26 Hitachi Ltd Verfahren zur Herstellung von Verbundwerkstoff für Schaltröhren

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015091883A1 (fr) * 2013-12-18 2015-06-25 Eaton Industries (Austria) Gmbh Pont de commutation pour appareil de commutation

Also Published As

Publication number Publication date
DE10019121A1 (de) 2001-10-25

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