KR100289987B1 - The electric contack point is made of Ag or Ag-Ni - Google Patents

The electric contack point is made of Ag or Ag-Ni Download PDF

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Publication number
KR100289987B1
KR100289987B1 KR1019980005049A KR19980005049A KR100289987B1 KR 100289987 B1 KR100289987 B1 KR 100289987B1 KR 1019980005049 A KR1019980005049 A KR 1019980005049A KR 19980005049 A KR19980005049 A KR 19980005049A KR 100289987 B1 KR100289987 B1 KR 100289987B1
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South Korea
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silver
nickel
contact
electric contact
agni
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KR1019980005049A
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Korean (ko)
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KR19990070291A (en
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김관수
윤원규
박명하
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김화중
희성금속주식회사
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    • 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
    • H01H1/023—Composite material having a noble metal as the basic material
    • 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
    • H01H1/027—Composite material containing carbon particles or fibres
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H01H1/04—Co-operating contacts of different material

Abstract

PURPOSE: An electric contact formed of silver(Ag) or silver-nickel(AgNi) is provided to achieve a superior welding strength and improved work efficiency by removing formation of air bubbles. CONSTITUTION: In coupling an electric contact(1) containing a graphite or carbon, an electric contact(1') of silver-metallic oxide(AgSnO2,AgCdO) manufactured through a powder method, and a terminal part(2), through a welding material(4), a silver(3) or silver-nickel(AgNi)(3') is coupled between the welding material and the electric contact, under a hydrogen atmosphere. The silver or silver-nickel layer has a thickness 0.5 to 50 percent of the total thickness of the electric contact.

Description

은 또는 은-니켈이 결합된 전기접점{The electric contack point is made of Ag or Ag-Ni}The electric contack point is made of Ag or Ag-Ni}

본 발명은 차단기용 전기접점분야에 사용되는 은(Ag) 또는 은니켈(Ag-Ni)이 결합된 전기접점에 관한 것으로, 특히 AgWCGr 및 AgGr계 접점 등 흑연이 함유된 접점재질은 단자부에 용접시 흑연의 산화로 인해 용접이 난이하기 때문에 용접성이 매우 좋은 은(Ag)을 접점의 한면에 결합시켜 용접성 및 용접강도를 유지시켜주기 위해 창출된 것이다.The present invention relates to an electrical contact combined with silver (Ag) or silver nickel (Ag-Ni) used in the electrical contact field for the circuit breaker, and in particular, a contact material containing graphite such as AgWCGr and AgGr-based contacts is welded to the terminal part. Since welding is difficult due to oxidation of graphite, silver (Ag), which is very weldable, is bonded to one side of the contact to maintain weldability and weld strength.

종래의 AgWCGr(Gr0.1∼20%함유) 및 AgGr(Gr0.1∼20%함유) 접점을 단자부에 용접하면 용접온도가 500∼900℃가 되어야 용접이 가능하므로 이 온도에서 흑연은 다음과 같은 반응으로 인해 Gas가 발생되어 용접성을 저하시켰던 것이다.If the conventional AgWCGr (Gr0.1 to 20%) and AgGr (Gr0.1 to 20%) contacts are welded to the terminal, the welding temperature should be 500 ~ 900 ℃, so the graphite is Gas was generated due to the reaction, which degraded the weldability.

즉, 흑연(Graphite)=Carbon(C)That is, graphite = carbon (C)

C+O2→CO, CO2가스 발생C + O 2 → CO, CO 2 gas generation

400℃ 이상에서 급격히 반응함Reacts rapidly above 400 ℃

또한, 흑연은 금속간의 용접이 잘되지 않는 금속이므로 일반적으로 용접성이 난이하였던 것이다.In addition, graphite is generally a difficult weldability because the metal is not well welded between metals.

상기와 같은 종래기술의 공정을 도 1을 참조하여 구체적으로 설명하면 다음과 같다.Referring to Figure 1 the prior art process as described in detail as follows.

먼저, 분말제조(S1)는 일정비율로 분말을 혼합시킨 다음, 일정크기의 금형속에 상기와 같이 혼합된 혼합분말을 투입하여 프레스(Press)로 가압성형(S2)을 실시한 후 소결(S3) 과정에서는 상기와 같이 성형(S2)된 성형체 내부에 구멍을 없애주고 분말입자간의 결합성을 유지시켜 주기 위해 600℃∼960℃의 온도에서 장시간 유지시켜준 다음 접점크기로 기계가공(S4)을 실시한 후 후처리(S5) 과정에서 표면조도를 양호하게 하는 공정인 것이다.First, in the powder manufacturing (S1), the powder is mixed at a predetermined ratio, and then the mixed powder mixed as described above is put into a mold of a predetermined size to perform press molding (S2) by pressing and then sintering (S3) process. In order to remove the hole in the molded body formed as described above (S2) and to maintain the bonding between the powder particles to maintain for a long time at a temperature of 600 ℃ ~ 960 ℃ and then subjected to machining (S4) to the contact size It is a process to improve the surface roughness in the post-treatment (S5) process.

상기와 같이 이루어지는 종래의 공정은 차단기(MCCB, ACB)용 전기접점 재질인 AgWCGr(Gr0.1∼20%함유)(1) 및 AgGr(Gr0.1∼20%함유)(1') 접점을 접점부 단자부(2)에 결합시키기 위해 용접재(4)에 의해 용접을 실시하고 있으나, 이때 흑연이 용접성을 저하시켜 용접강도가 낮기에 차단기 사용시 접점의 탈락발생 및 내수명성에 막대한 지장을 초래하였던 것이다.The conventional process made as described above contacts AgWCGr (containing 0.1 to 20%) (1) and AgGr (containing 0.1 to 20%) (1 '), which are electrical contact materials for circuit breakers (MCCB, ACB). Although welding is performed by the welding material 4 in order to couple to the secondary terminal part 2, the graphite degrades the weldability, and thus the welding strength is low, which causes a great problem in the dropout of the contact point and the service life when the breaker is used. .

즉, 도 2에서 나타낸바와 같이, 용접시 접점내의 흑연으로 인해 용접재(4)에는 기공(5)이 심하게 발생되어 차단기를 사용할 때 심한 아크(Arc)열에 의해 접점 단자부(2)에서 쉽게 접점이 떨어지거나 전류가 잘 흐르지 않아 접점이 쉽게 소모되는 문제점이 야기되었던 것이다.That is, as shown in Figure 2, due to the graphite in the contact during welding, the pores 5 are severely generated in the welding material 4, so that the contact easily at the contact terminal portion 2 due to severe arc heat when using the breaker. The problem is that the contact points are easily consumed because they do not fall or the current does not flow well.

본 발명은 상기와 같은 폐단을 해결하고자 창출한 것으로, 종래의 흑연 또는 카본이 함유된 전기접점의 용접성을 우수하게 하기 위해 전기접점의 용접면에 도 3과 같이 용접성이 매우 양호한 은(Ag) 또는, 은-니켈(AgNi)을 결합시켜 그 문제를 해결하고자 함에 있는 것이다.The present invention has been made to solve the above-described closed end, in order to improve the weldability of the conventional electrical contacts containing graphite or carbon, the weld surface of the electrical contact as shown in Figure 3 very good silver (Ag) or In order to solve the problem by combining silver-nickel (AgNi).

도 1은 종래의 전기접점을 나타내는 공정의 블록도인 것이다.1 is a block diagram of a process showing a conventional electrical contact.

도 2는 종래의 용접상태를 나타내는 결합단면도인 것이다.2 is a cross-sectional view showing a conventional welding state.

도 3은 본 발명의 용접상태를 나타내는 결합단면도인 것이다.3 is a cross sectional view showing a welding state of the present invention.

도 4는 본 발명의 전기접점을 나타내는 공정의 블록도인 것이다.4 is a block diagram of a process showing an electrical contact of the present invention.

* 도면의 주요부분에 대한 부호설명* Explanation of symbols on the main parts of the drawings

1,1'. AgWCGr 및 AgGr 전기접점 2. 단자부1,1 '. AgWCGr and AgGr Electrical Contacts 2. Terminal

3. 은(Ag) 3'. 은-니켈(AgNi)3. Silver (Ag) 3 '. Silver-Nickel (AgNi)

4. 용접재(은납, 인동납) 5. 기공4. Welding material (silver lead, phosphorous lead) 5. Pore

상기의 목적을 달성하기 위한 본 발명의 구성을 도 3에서 상세히 설명하도록 하면 다음과 같다.The configuration of the present invention for achieving the above object will be described in detail in FIG. 3 as follows.

차단기용 전기접점 재질인 AgWCGr(은텡스텐카바이드흑연)(1), 또는 AgGr(은흑연)(1')의 하부에 은(Ag)(3) 또는 은-니켈(AgNi)(3')등을 부착시켜서 차단기용 단자(2)에 용접(4)을 실시하면 도 3과 같이 아주 양호하게 용접이 되는 것이다.Silver (Ag) (3) or silver-nickel (AgNi) (3 '), etc., may be placed under the AgWCGr (silver graphite carbide) (1) or AgGr (silver graphite) (1'), which is an electrical contact material for a circuit breaker. When the welding 4 is applied to the terminal 2 for the circuit breaker, the welding is performed very well as shown in FIG.

상기와 같이 구성된 은(Ag)(3)의 전기접점의 공정을 도 4에 의해 상세히 설명하면 다음과 같다.The process of the electrical contact of silver (Ag) (3) configured as described above will be described in detail with reference to FIG.

먼저, 은(Ag) 분말제조(S12) 및 접점분말제조(S12)의 제법은 은(Ag)(3) 분말을 0.5∼5㎛크기로 만들어 일정한 조성비로 분말을 혼합시킨 후 이중성형(S13) 과정에서 일정크기의 금형속에 은분말을 접점분말 무게의 0.5∼30% 이내로 계량하여 투입한 뒤 1차성형 또는 고르게 성형시킨후 그 위에 접점재질 분말을 투입한 후 마무리 성형을 실시하는 것이다. (이때 성형압력은 1차성형은 0∼1ton/㎠, 2차성형은 0.5∼4ton/㎠)First, silver (Ag) powder production (S12) and contact powder production (S12) manufacturing method is to make the silver (Ag) (3) powder 0.5 to 5㎛ size and mix the powder in a constant composition ratio and then double molding (S13) In the process, the silver powder is weighed into 0.5 ~ 30% of the weight of the contact powder in the mold of a certain size, and then the primary molding or evenly molding, and then the contact material powder is put on the finishing molding. (At this time, the molding pressure is 0 ~ 1 ton / cm2 for primary molding and 0.5 ~ 4 ton / cm2 for secondary molding)

또한, 소결(S14) 과정에서는 상기와 같이 성형된 성형체 내부 도 2에 나타낸 바와같이 용접재(4)에서 발생되는 기공(5)을 없애주고 분말 입자간의 결합성을 유지시키기 위해 600∼960℃, 수소(H2) 분위기에서 5분∼5시간정도 유지시켜 소성한다. 상기와 같이 소결(S14)한 후에는 가압(S15) 과정에서 잔존하고 있는 미세한 기공(5)을 없애기 위해 일정 크기의 금형속에 넣어 가압력(2ton/㎠∼8ton/㎠정도)으로 가압(S15)을 시켜준 다음에 접점크기로 기계가공(S16)을 실시하고 마지막으로 표면조도를 양호하게 후처리(S17) 공정을 실시하는 것이다.In addition, in the sintering (S14) process as shown in Figure 2 to remove the pores 5 generated in the welding material (4) as shown in Figure 2 to maintain a bond between the powder 600 ~ 960 ℃, It is baked by holding for 5 minutes to 5 hours in a hydrogen (H2) atmosphere. After sintering (S14) as described above is pressed (S15 to the pressing force (2 ton / ㎠~8 ton / ㎠ degree) put in pressure (S15), and a mold of a predetermined size in order to eliminate the fine pores (5) which remains in the process ) And then machined to the contact size (S16), and finally to perform a post-treatment (S17) process with good surface roughness.

또한, 다른 실시예로서 상기와 같은 공정 및 제법은 흑연 함유재질 이외에도 Ag+금속산화물계(AgSnO2, AgCdO) 분말법 접점제조시에도 적용할 수 있으며, 전기접점과 용접재의 사이에 용접성이 양호한 재질인 은(Ag)(3)분말 이 외에도 은-니켈(AgNi : Ni함유량 0.1∼40%)(3')을 사용해도 동일한 작용을 갖게 되는 것이다.In addition, as another embodiment, the process and manufacturing method as described above can be applied to the production of Ag + metal oxide (AgSnO 2 , AgCdO) powder method in addition to the graphite-containing material, and a good weldability between the electrical contact and the welding material In addition to silver (Ag) (3) powder, silver-nickel (AgNi: 0.1-40% of Ni content) (3 ') also has the same effect.

상기의 공정에 의해 은(Ag)(3) 또는 은-니켈(AgNi)(3')이 차단기에 장착되어 종래의 접점시에는, 개폐시에 심한 아크(Arc)열에 의해 탈락이 발생될 수 있으나 본 발명은 용접강도가 매우 우수하여 탈락빈도가 매우 적은 효과가 있고, 종래의 접점은 용접면에 심한 기포가 발생되어 전류의 흐름을 방해하므로 접점수면성에 지장을 초래하였으나 본 발명은 용접성이 우수하기에 기포발생을 없애주어 내수명성이 매우 양호한 효과가 있으므로 용접시 작업효율성이 증대된다.(종래의 접점보다 120%∼200%증대)By the above process, silver (Ag) 3 or silver-nickel (AgNi) 3 'is mounted on the circuit breaker, and in the case of a conventional contact, dropping may occur due to severe arc heat during opening and closing. In the present invention, the welding strength is very excellent and the dropout frequency is very low, and the conventional contact points cause severe bubbles in the welding surface, which hinders the flow of the current, thereby causing a problem in contact sleepability. It eliminates bubbles and has a very good service life, which increases work efficiency during welding. (120% ~ 200% increase than conventional contacts)

또한, 종래의 접점제법에 비해 본 발명의 접점제법은 도 3에서 나타낸 바와같이 소결(S14)공정후 가압(S15)공정을 추가하였기 때문에 접점재질내 기포를 최대한 없애주어 접점자체 강도를 유지시켜주는 효과가 있는 매우 유용한 발명인 것이다.In addition, the contact manufacturing method of the present invention compared to the conventional contact manufacturing method, as shown in Figure 3, after the sintering (S14) step after the addition of the pressure (S15) process to remove the bubbles in the contact material as possible to maintain the contact itself strength It is a very useful invention that works.

Claims (2)

흑연 또는 카본이 함유된 전기접점(AgWCGr 및 AgGr)(1) 및 분말법으로 제조되는 은(Ag)-금속산화물계(AgSnO2, AgCdO) 전기접점(1')과 단자부(2)를 용접재(4)에 의해 결합시키는 것에 있어서,The electrical contact (AgWCGr and AgGr) (1) containing graphite or carbon and the silver (Ag) -metal oxide type (AgSnO2, AgCdO) electrical contact (1 ') and the terminal portion (2) manufactured by the powder method are welded ( In bonding by 4), 상기 용접재(4)와 전기접점(1)(1')의 사이에 은(Ag)(3)이나 은-니켈(AgNi)(3')을 수소분위기에서 결합시키는 것을 특징으로 은 또는 은-니켈이 결합된 전기접점.Silver (Ag) (3) or silver-nickel (AgNi) (3 ') is bonded between the welding material (4) and the electrical contact (1) (1') in a hydrogen atmosphere. Nickel-coupled electrical contacts. 제 1항에 있어서,The method of claim 1, 상기 은(Ag)(3) 또는 은-니켈(AgNi)(3')층이 접점전체 두께의 0.5∼50%인 것을 특징으로 하는 은 또는 은-니켈이 결합된 전기접점.The silver (Ag) (3) or silver-nickel (AgNi) (3 ') layer is an electrical contact with a silver or silver-nickel, characterized in that 0.5 to 50% of the total thickness of the contact.
KR1019980005049A 1998-02-18 1998-02-18 The electric contack point is made of Ag or Ag-Ni KR100289987B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2501133C2 (en) * 2008-11-06 2013-12-10 Додуко Гмбх Manufacturing method for semi-finished part for electric contacts, semi-finished part and electric contact part

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04326716A (en) * 1991-04-26 1992-11-16 Hitachi Aic Inc Manufacture of solid electrolytic capacitor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04326716A (en) * 1991-04-26 1992-11-16 Hitachi Aic Inc Manufacture of solid electrolytic capacitor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2501133C2 (en) * 2008-11-06 2013-12-10 Додуко Гмбх Manufacturing method for semi-finished part for electric contacts, semi-finished part and electric contact part

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