CN105453206A - Electric contact point and contact element - Google Patents
Electric contact point and contact element Download PDFInfo
- Publication number
- CN105453206A CN105453206A CN201380078806.6A CN201380078806A CN105453206A CN 105453206 A CN105453206 A CN 105453206A CN 201380078806 A CN201380078806 A CN 201380078806A CN 105453206 A CN105453206 A CN 105453206A
- Authority
- CN
- China
- Prior art keywords
- contact
- electric contact
- erosion
- electric
- contact point
- 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.)
- Granted
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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
- H01H11/041—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts by bonding of a contact marking face to a contact body portion
-
- 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
- H01H1/0231—Composite material having a noble metal as the basic material provided with a solder layer
-
- 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
- H01H1/0237—Composite material having a noble metal as the basic material and containing oxides
- H01H1/02372—Composite material having a noble metal as the basic material and containing oxides containing as major components one or more oxides of the following elements only: Cd, Sn, Zn, In, Bi, Sb or Te
-
- 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
- H01H1/025—Composite material having copper as the basic material
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Contacts (AREA)
Abstract
[Problem] An arcing horn, or the like, for guiding an arc occurring when opening/closing an electric contact thereby preventing erosion of the contact point or a support material, or, a protruding portion of the support material provided at an extremity portion of the contact point in the direction in which the arc is driven thereby rendering the contact point difficult to melt, are known ways in prior art to prevent detachment and erosion. However, as these methods are only realizable if sufficient space can be secured for an arc-extinguishing chamber, or if sufficient dimensions of the support material can be secured, these methods are not necessarily adoptable if a device is to be reduced in size. [Solution] The present invention is characterized in that an electric contact point and a contact element having improved resistance to erosion are achieved by a reduction in the amount of erosion at the electric contact point, comprising pasting onto the surface of a pure silver layer on the back side of a contact point where detachment and erosion readily progress, a copper or a copper alloy having excellent electric conductivity, heat conductivity and mechanical strength as a functional layer, thereby conferring to the functional layer a function of transmitting to a support material the heat generated when opening/closing the electric contact, a function of shortening the duration of chattering, and a function of preventing detachment and erosion, or the like, by maintaining the strength of the bond with the support material.
Description
Technical field
The present invention relates to the electric contact and contact that use in the contactor control such as circuit breaker or electromagnetic switch equipment.
Background technology
For the opening and closing devices such as electromagnetic switch, in order to realize the long lifetime of equipment, the resistance to consumption performance of electric contact material itself is improved, making it long lifetime is most shortcut, thus carries out and the performance-relevant various research and development of resistance to consumption improving electric contact material itself.
Wherein, known particularly as electromagnetic switch and relay etc. when opening and closing frequency is high and because of its service condition when tight demand long lifetime, the joint method of the base material of electric contact material and contact and the good no life-span to electric contact material itself of its engagement state make a big impact.
But, in recent years, in the opening and closing device such as electromagnetic switch and relay, along with the development of the miniaturization of equipment, in order to reduce the noble metal amount of use to reduce costs, shape self ground reducing electric contact is had to carry out the trend designed, and on the contrary, present situation is that the behaviour in service of electric contact material is harsh, the lost of life of electric contact.
Because of this situation, longer than ever life-span is required to electric contact material, expect to improve resistance to consumption performance, but realize that these are very difficult.
In addition, by the electric contact of off-state to connection time, sometimes between electric contact, there are mechanical oscillation imperceptibly very fast, and produce the flutter phenomenon of electric arc with occurring in minim gap intermittent.
When producing this flutter phenomenon, the electric arc between electric contact produces number and increases, therefore, and the problem that the consumption that there is electric contact material increases.In addition, when the duration trembleed is long, electric contact material is easy to welding, therefore, expects the duration shortening this vibration as far as possible.
Prior art document
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 2008-152971 publication
Patent documentation 2: Japanese Unexamined Patent Publication 2012-221759 publication
Summary of the invention
Invent technical problem to be solved
Here, by explaining technical problem as object of the present invention and solution thereof about the structure of electric contact and contact and the explanation of consumption ways thereof.
As the general structure of the electric contact used in the opening and closing device such as electromagnetic switch and relay, have at Ag-SnO
2-In
2o
3deng the one side laminating fine silver of silver oxide system electric contact material, and using structure (such as patent documentation 1) that this fine silver face uses as the composition surface of the base material with contact.
Electric contact material one side laminating fine silver be because, when silver oxide system electric contact material is directly engaged with the base material of contact, be difficult to welding because silver oxide system electric contact material self is made into, thus with the joint interface of base material on can not get mechanical strength.
But, even if at laminating fine silver layer, and when the face of fine silver layer is used as the composition surface of the base material with contact and engages with the base material of contact, when opening and closing number of times in electrical endurance test adds up gradually, this fine silver layer can become the starting point peeled off and consume, the increase that result can cause contact to consume.
Consume to prevent this stripping, following method known in the state of the art, namely, the electric arc produced when contact opening and closing is responded to by utilizing arc horn (archorn) etc., prevent the consumption of the base material of electric contact material or contact, or, the male portion of the base material of contact is set by the contact end in the direction driven at electric arc, makes electric contact be difficult to melting (such as patent documentation 2).
But these methods are the methods that only could realize when fully guaranteeing the space of explosion chamber or when fully can guarantee the size of the base material of contact, and therefore, present situation is when making device miniaturization, and these methods may not adopt.
The technical scheme of technical solution problem
Therefore, the present invention is in the consumption ways of electric contact, stripping consumption near the junction surface being conceived to the base material of electric contact material and contact especially, a kind of electric contact and contact are provided, be easy to the face of carrying out peeling off the electric contact material fine silver layer simultaneously consumed is fitted by conductivity, heat conductivity, the functional layer formed with copper or the copper alloy of the bond strength excellence of silver, this functional layer is had the heat trnasfer produced when establishing by cable electric contact material and close to the function of the base material of contact and prevent from peeling off the function to consume etc. by the bond strength of the base material maintaining electric contact material and contact, thus, the consumption of electric contact material can be alleviated, resistance to consumption performance is improved.
Need because opening and closing frequency is high the copper alloy that the base material of the contact with mechanical strength uses, when the silver-colored face of electric contact material engages with the base material of contact, compared with when being copper with the base material of contact, bond strength is low.
Therefore, as an example of the present invention, used as functional layer by the copper of the base material homology using the contact with copper system, can maintain with the bond strength of the base material of electric contact and contact while, also maintain the mechanical strength of the base material of contact.
The present invention also provides a kind of electric contact and contact, correspondingly functional layer is thickened with thinning electric contact material than ever, and the copper softer than the base material of electric contact and contact or copper alloy are used as functional layer and form electric contact, thus, impact during functional layer absorption vibration can be made, shorten the vibration duration, and alleviate the consumption of electric contact.
Therefore, as an example of the present invention, by the copper softer to functional layer configuration, and harder copper is configured to the base material of the contact being required mechanical strength, also can shorten the vibration duration.
Invention effect
According to electric contact of the present invention and contact, be easy to carry out the face laminating of fine silver layer of the one side peeling off the electric contact consumed by conductivity, heat conductivity, the functional layer that forms with copper or the copper alloy of the bond strength excellence of silver, make the layer of this copper or copper alloy have by the heat trnasfer produced when electric contact being established by cable and closes to base material function, shorten the vibration duration function and by maintain and the bond strength of base material of contact prevents from peeling off the function to consume etc., thereby, it is possible to alleviate the consumption of electric contact.
The electric contact obtained like this and contact, when implementing electrical endurance test, compared with existing electric contact, can make the maximum raising of resistance to consumption performance about 20%.
In addition, in the prior art, when carrying out design alteration with reducing the shape of the thickness of electric contact material etc. to reduce the noble metal amount of use at every turn, space change between contact, therefore, need to change the weight of base material of contact and size etc., therefore, there is the problem also needing the design alteration of opening and closing device self.
But the electric contact with functional layer of the application of the invention, does not change the thickness of electric contact, just can reduce the thickness of electric contact material, therefore, the gap between contact can not change, and does not need design alteration opening and closing device self.Thereby, it is possible to reduce the cost of all size change, provide cheap opening and closing device.
In addition, the electric contact with functional layer of the present invention can be applicable to the base material of the contact of arbitrary shape and any copper system material.
Accompanying drawing explanation
Fig. 1 is the stereogram of the contact representing embodiment 1.
Fig. 2 is the key diagram in the cross section of the electric contact representing embodiment 2.
Fig. 3 is the key diagram representing the electric contact of embodiment 2 and the cross section of contact.
Description of reference numerals
1 electric contact material
2 fine silver layers
3 functional layers
4 electric contacts
The base material of 5 contacts
The base material of 6 rivet shape
Embodiment
Table 1 illustrates embodiments of the invention and conventional example, and the manufacturing procedure of these electric contact materials 1 is described.In addition, embodiment and comparative example are distinguished by electric contact kind No., describe the consumption (%) after AC3 level test (based on JISC8201-3 and JISC8201-4-1) of the ratio (%) shared by fine silver layer of each electric contact and the ratio shared by functional layer (%), each electric contact in table 1.
Embodiment 1
Make by dissolution method the silver alloy that composition is 91Ag-5.8Sn-3In-0.2Ni in mass %, repeat rolling, annealing, obtain the plate of wishing.In addition, in the present invention, as long as the silver alloy such as Ag-Ni system alloy, Ag-W system alloy that electric contact material uses, or in rear operation, implement internal oxidation process and form the material of silver oxide system electric contact material, then can use arbitrary silver alloy.
Form a kind of composite material, this composite material is formed as the fine silver plate that the thickness of fine silver layer 2 is 3 ~ 30% of electric contact total thickness in the one side compound of this plate.In addition, in the present invention, when fine silver layer 2 is less than 3% of electric contact thickness, undesirable with the bond strength of functional layer, when being greater than 30% of electric contact thickness, compared with thickening fine silver layer, bond strength does not find significant effect, the increase of noble metal use amount can cause material price to uprise, therefore not preferred.
Utilize this composite material, by pressurization punching (presspunching) processing, obtain the composite material of the square quadrilateral shape of 10mm.Implement tumbling, internal oxidation process to the square composite material of the 10mm obtained like this, and that thickness be 1 ~ 50% of electric contact total thickness anaerobic Cu (Vickers hardness 74) square with as the 10mm of functional layer 3 engages, and forms electric contact 4.In addition, in the present invention, when functional layer 3 is less than 1% of electric contact thickness, can not seeing significantly and to improve with the bond strength of the base material of contact and to tremble the effect of decreased duration, when exceeding 50% of electric contact thickness, and thickening functional layer correspondingly, electric contact material is thinning, therefore, the lifetime of electric contact material self, not preferably.In addition, if in functional layer 3 use copper or copper alloy than the electric contact material 1 of silver oxide system and the base material 5 of contact soft, can be just any copper or copper alloy.
By base material 5 soldered joint of the electric contact 4 obtained like this and the contact be made up of anaerobic Cu (Vickers hardness 110), formed contact (Fig. 1) (electric contact kind No.1 ~ 5).
Embodiment 2
Except the base material 5 of functional layer 3 and contact being replaced as the Cu alloy that is made up of 97Cu-2.6Fe-0.15P-0.25Zn, in the same manner as in Example 1, contact (Fig. 1) (electric contact kind No.6 ~ 10) are formed.In addition, the Vickers hardness of functional layer is 94, and the Vickers hardness of the base material of contact is 140.
Embodiment 3
Utilize the composite material obtained by method similarly to Example 1, by pressurization punching processing, obtain the discoideus composite material of 10mm φ.
Tumbling, internal oxidation process are implemented to the composite material of the 10mm φ obtained like this, using as the 10mm φ of functional layer 3 and after the plectane be made up of anaerobic Cu (Vickers hardness 74) that thickness is 1 ~ 50% of electric contact total thickness engages with composite material, with base material 6 soldered joint of the rivet shape be made up of anaerobic Cu (Vickers hardness 110), form electric contact (Fig. 2).
The base material 5 of the contact consisted of with by anaerobic Cu (Vickers hardness 110) the base material 6 of rivet shape by such electric contact 4 engages, and is formed contact (Fig. 3) (electric contact kind No.11 ~ 15).
Embodiment 4
Except the base material 6 of functional layer 3, rivet shape and the base material 5 of contact being replaced as the Cu alloy that is made up of 97Cu-2.6Fe-0.15P-0.25Zn, in the same manner as in Example 3, contact (Fig. 3) (electric contact kind No.16 ~ 20) are formed.In addition, the Vickers hardness of functional layer is 94, and the Vickers hardness of the base material of rivet shape and the base material of contact is 140.
Conventional example 1
Utilize the composite material obtained by method similarly to Example 1, by pressurization punching processing, obtain the composite material of the square quadrilateral shape of 10mm.Tumbling, internal oxidation process and after forming electric contact are implemented to the composite material that obtains like this, with the base material soldered joint of the contact be made up of anaerobic Cu (Vickers hardness 110), make contact (electric contact kind No.21 ~ 22) similarly to Example 1 except the presence or absence of functional layer.
Conventional example 2
Utilize the composite material obtained by method similarly to Example 1, by pressurization punching processing, obtain the composite material of the square quadrilateral shape of 10mm.Tumbling, internal oxidation process and after forming electric contact are implemented to the composite material that obtains like this, with the base material soldered joint of the contact be made up of the Cu alloy (Vickers hardness 140) of 97Cu-2.6Fe-0.15P-0.25Zn, make contact (electric contact kind No.23 ~ 24) similarly to Example 2 except the presence or absence of functional layer.
Conventional example 3
Utilize the composite material obtained by method similarly to Example 1, by pressurization punching processing, obtain the discoideus composite material of 10mm φ.Tumbling, internal oxidation process and after forming electric contact are implemented to the composite material that obtains like this, with base material (Vickers hardness 110) soldered joint of the rivet shape be made up of anaerobic Cu, and the base material (Vickers hardness 110) of the contact formed with by anaerobic Cu engages, make contact (electric contact kind No.25 ~ 26) similarly to Example 3 except the presence or absence of functional layer.
Conventional example 4
Utilize the composite material obtained by method similarly to Example 1, by pressurization punching processing, obtain the discoideus composite material of 10mm φ.Tumbling, internal oxidation process and after forming electric contact are implemented to the composite material that obtains like this, with the base material soldered joint of the rivet shape be made up of the Cu alloy (Vickers hardness 140) of 97Cu-2.6Fe-0.15P-0.25Zn, and the base material (Vickers hardness 140) of contact with 97Cu-2.6Fe-0.15P-0.25Zn engages, and makes contact (electric contact kind No.27 ~ 28) similarly to Example 4 except the presence or absence of functional layer.
The electromagnetic switch the result of resistance to consumption performance being carried out to physical device evaluation that the contact made by the above embodiments 1 ~ 4 and conventional example 1 ~ 4 are installed on specified 80A is represented in table 1.In addition, for the condition that physical device is evaluated, carry out AC3 level test (440V, 80A) of JISC8201 defined, opening and closing number of times is implemented into till 1,000,000 times.
About consumption, measure the weight change of the contact before and after the test of AC3 level, which kind of degree is the quality after precentagewise represents the test of AC3 level decrease before the test of AC3 level.
Its result, confirms in embodiment 1 ~ 4, and compared with conventional example 1 ~ 4, the consumption of electric contact alleviates about 10 ~ 20%, confirms that the resistance to consumption performance of electric contact improves.
In addition, only the base material 5 of the contact of embodiment 1 be replaced as the Cu alloy (Vickers hardness 140) of 97Cu-2.6Fe-0.15P-0.25Zn and carried out same test, but consumption is equal with embodiment 1.
In addition, the base material 6 of the rivet shape of embodiment 3 and the base material 5 of contact are replaced as the Cu alloy (Vickers hardness 140) of 97Cu-2.6Fe-0.15P-0.25Zn, and have carried out same test, but consumption is equal with embodiment 3.
[table 1]
Claims (5)
1. an electric contact, it can form contact by engaging with base material, and comprises silver alloy, and the feature of this electric contact is:
By forming the layer of fine silver in the one side of the electric contact material be made up of silver alloy, and the functional layer be made up of copper or copper alloy of fitting in the face relative with this one side, be formed as sandwich construction.
2. electric contact as claimed in claim 1, is characterized in that:
The thickness of the layer of fine silver is 3 ~ 30% of the thickness of electric contact entirety.
3. electric contact as claimed in claim 1, is characterized in that:
The thickness of the layer of copper or copper alloy is 1 ~ 50% of the thickness of electric contact entirety.
4. a contact, is characterized in that:
Form by the functional layer of the electric contact being arranged at claim 1 is engaged with base material.
5. contact as claimed in claim 4, is characterized in that:
The shape of base material is rivet shape.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2013/071286 WO2015019424A1 (en) | 2013-08-06 | 2013-08-06 | Electric contact point and contact element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105453206A true CN105453206A (en) | 2016-03-30 |
| CN105453206B CN105453206B (en) | 2018-07-10 |
Family
ID=52460796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380078806.6A Active CN105453206B (en) | 2013-08-06 | 2013-08-06 | Electric contact and contact |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5992625B2 (en) |
| KR (1) | KR20160040585A (en) |
| CN (1) | CN105453206B (en) |
| WO (1) | WO2015019424A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113168971A (en) * | 2018-11-30 | 2021-07-23 | 三菱电机株式会社 | Electrical contact and method of making same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102313183B1 (en) * | 2017-03-08 | 2021-10-14 | 엘에스오토모티브테크놀로지스 주식회사 | Micro-switch for power window switch unit and power window switch unit for vehicle having the same |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02179369A (en) * | 1988-12-29 | 1990-07-12 | Tokuriki Honten Co Ltd | Ag-oxide composite contact material and its manufacture |
| JPH03110724A (en) * | 1989-09-25 | 1991-05-10 | Tokuriki Honten Co Ltd | Complex material for electrical contact |
| CN1777966A (en) * | 2003-04-22 | 2006-05-24 | 路易斯伦勒有限公司 | Contact piece made of tungsten provided with a corrosion-resistant layer made of a base metal |
| CN1898415A (en) * | 2003-10-31 | 2007-01-17 | 古河电气工业株式会社 | Silver-coated stainless strip for movable contact and method for production thereof |
| CN101562081A (en) * | 2008-04-18 | 2009-10-21 | 佛山精密电工合金有限公司 | Silver-saving laminating composite contact terminal piece and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5885224A (en) * | 1981-11-16 | 1983-05-21 | 株式会社安川電機 | Lead switch |
-
2013
- 2013-08-06 KR KR1020167003782A patent/KR20160040585A/en not_active Application Discontinuation
- 2013-08-06 WO PCT/JP2013/071286 patent/WO2015019424A1/en active Application Filing
- 2013-08-06 CN CN201380078806.6A patent/CN105453206B/en active Active
- 2013-08-06 JP JP2015530589A patent/JP5992625B2/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02179369A (en) * | 1988-12-29 | 1990-07-12 | Tokuriki Honten Co Ltd | Ag-oxide composite contact material and its manufacture |
| JPH03110724A (en) * | 1989-09-25 | 1991-05-10 | Tokuriki Honten Co Ltd | Complex material for electrical contact |
| CN1777966A (en) * | 2003-04-22 | 2006-05-24 | 路易斯伦勒有限公司 | Contact piece made of tungsten provided with a corrosion-resistant layer made of a base metal |
| CN1898415A (en) * | 2003-10-31 | 2007-01-17 | 古河电气工业株式会社 | Silver-coated stainless strip for movable contact and method for production thereof |
| CN101562081A (en) * | 2008-04-18 | 2009-10-21 | 佛山精密电工合金有限公司 | Silver-saving laminating composite contact terminal piece and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113168971A (en) * | 2018-11-30 | 2021-07-23 | 三菱电机株式会社 | Electrical contact and method of making same |
| CN113168971B (en) * | 2018-11-30 | 2022-07-22 | 三菱电机株式会社 | Electrical contact and method of making same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5992625B2 (en) | 2016-09-14 |
| JPWO2015019424A1 (en) | 2017-03-02 |
| KR20160040585A (en) | 2016-04-14 |
| WO2015019424A1 (en) | 2015-02-12 |
| CN105453206B (en) | 2018-07-10 |
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