CN102912393A - Silver plating technology of drop-out fuse - Google Patents
Silver plating technology of drop-out fuse Download PDFInfo
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- CN102912393A CN102912393A CN201210416002XA CN201210416002A CN102912393A CN 102912393 A CN102912393 A CN 102912393A CN 201210416002X A CN201210416002X A CN 201210416002XA CN 201210416002 A CN201210416002 A CN 201210416002A CN 102912393 A CN102912393 A CN 102912393A
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- fuse switch
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Abstract
The invention discloses a silver plating technology of a drop-out fuse. The silver plating technology comprises the following steps: 1) preplating: using an organic solvent or an alkalescent oil removal agent to remove a superficial oil solution on a contact of the drop-out fuse under the medium and low temperature environment, and then performing electrolytic polishing; 2) pyrophosphate copper plating: performing a pyrophosphate copper plating process for the preplated contact of the drop-out fuse in the plating solution with temperature of 50 to 60 DEG C; 3) silver plating: enabling the electrified contact of the drop-out fuse after being subjected to pyrophosphate copper plating into the silver plating solution directly, and plating the silver through pulsed power supply at normal temperature; and 4) protective treatment: dip-coating the contact of the drop-out fuse after being subjected to silver plating process for 5 to 8 minutes in a protective agent, and then draining the contact after being taken out and washed. Through the above ways, the silver plating technology of the drop-out fuse provided by the invention is convenient to operate, simple and feasible, and safe and environment-friendly; and the silver plating layer is unlikely to fall off and change color, thereby guaranteeing good conductivity and weldability of the silver plating layer.
Description
Technical field
The present invention relates to technical field of surface, particularly relate to a kind of silver plating process of contact of fuse switch.
Background technology
At present, the connector of electronic industry, instrument industry extensively adopts silver plating process, to reduce the contact resistance of metallic surface, improves the performance of product.
Fuse switch is the most frequently used a kind of protective switch of the short circuit of 10kV distribution line branch line and substation transformer, is widely used in 10kV distribution line and substation transformer primary side as protection and carries out the usefulness that equipment is thrown, cut operation.Its principle of work is: the upper moving contact at the fusion tube two ends of fuse switch and lower moving contact rely on fuse-link to fasten, after upper moving contact pushed the duckbilled convex part, the upper static contact that phosphorus bronze sheet etc. are made heads on moving contact, is stuck in the duckbilled so will manage securely.When short-circuit current by making fuse-link when fusing, namely produce electric arc, the vulcanized fiber tube of pipe liner produces a large amount of gases under electric arc uses, use expulsion of arc to go out at current over-zero.Because fuse-link fusing, under the effect of the up and down moving contact spring sheet of fusion tube, fusion tube falls rapidly, circuit is disconnected, excision faulty section circuit or malfunction equipment.
This shows, contact is the key part of fuse switch, should contact between contact closely, the contact pressure of both sides should be even, and contact surface should be smooth, cleaning, generally all adopts direct silver plating process, make contact have good performance, its master operation is plating pre-treatment, silver-plated and plating aftertreatment.Existing silver plating process need to adopt cyanide copper plating and pre-silver plating process before silver-plated, complex process, and contain a large amount of toxic cyanide in the cyanide copper plating liquid, and not meeting the cleaner production requirement, silvered film easily comes off, variable color.
Summary of the invention
The technical problem that the present invention mainly solves provides a kind of silver plating process of contact of fuse switch, and is easy to operate, simple possible, and safety and environmental protection, and silvered film difficult drop-off, variable color have guaranteed electroconductibility and weldability that silvered film is good.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of silver plating process of contact of fuse switch is provided, may further comprise the steps:
1) plating pre-treatment: adopt organic solvent or weakly alkaline degreaser under middle low temperature environment, to remove the surperficial fluid of the contact of fuse switch, then carry out electropolishing;
2) pyrophosphate copper plating: will in 50-60 ℃ plating bath, carry out pyrophosphate copper plating technique through the contact of fuse switch of plating pre-treatment;
3) silver-plated: as will through direct charged the entering in the silver plating solution of the contact of the fuse switch of pyrophosphate copper plating, to adopt at normal temperatures the pulse power silver-plated;
4) conservation treatment: will be through the contact of the fuse switch of silver-plated processing in protective material under the normal temperature dip-coating 5-8 minute, then take out and drain after cleaning.
In a preferred embodiment of the present invention, the plating bath in the described pyrophosphate copper plating technique comprises cupric pyrophosphate, potassium pyrophosphate and two ammoniacal liquor, and pH value is 7.5-8.5, and wherein, the content of described cupric pyrophosphate is 80-90g/L.
In a preferred embodiment of the present invention, the electroplating time of described pyrophosphate copper plating is 3-5 minute, and thickness of coating is 1-2 μ m.
In a preferred embodiment of the present invention, the argent content in the described silver plating solution is 25-30g/L.
In a preferred embodiment of the present invention, described strength of current when silver-plated is 0.5A, and the time is 10-20 minute, and thickness of coating is more than or equal to 4.1 μ m.
The invention has the beneficial effects as follows: a kind of silver plating process of contact of fuse switch, by in pyrophosphate copper plating technique, choosing suitable pyrophosphate copper plating solution composition and pH value, the thickness of control pyrophosphate copper plating layer, make that it does not burn, not plating leakage, be difficult for decortication, and can be directly silver-plated, easy to operate, simple possible, safety and environmental protection, and silvered film difficult drop-off, variable color have guaranteed electroconductibility and weldability that silvered film is good.
Description of drawings
Fig. 1 is the process flow schematic diagram of silver plating process of the contact of fuse switch of the present invention.
Embodiment
Below in conjunction with accompanying drawing preferred embodiment of the present invention is described in detail, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that protection scope of the present invention is made more explicit defining.
See also Fig. 1, the embodiment of the invention comprises:
A kind of silver plating process of contact of fuse switch may further comprise the steps:
1) plating pre-treatment: adopt organic solvent or weakly alkaline degreaser under middle low temperature environment, to remove the surperficial fluid of the contact of fuse switch, then carry out electropolishing and do further oil removing, improve simultaneously the condition of surface of the contact of fuse switch;
2) pyrophosphate copper plating: will in 50-60 ℃ plating bath, carry out pyrophosphate copper plating technique through the contact of fuse switch of plating pre-treatment, its electroplating time is 3-5 minute, thickness of coating is 1-2 μ m, described plating bath comprises cupric pyrophosphate, potassium pyrophosphate and two ammoniacal liquor, the pH value of described plating bath is 7.5-8.5, wherein, the content of described cupric pyrophosphate is 80-90g/L;
3) silver-plated: will be through direct charged the entering in the silver plating solution of the contact of the fuse switch of pyrophosphate copper plating, adopt at normal temperatures the pulse power silver-plated, the strength of current of the described pulse power is 0.5A, electroplating time is 10-20 minute, thickness of coating is more than or equal to 4.1 μ m, and the argent content in the described silver plating solution is 25-30g/L;
4) conservation treatment: will be through the contact of the fuse switch of silver-plated processing in protective material under the normal temperature dip-coating 5-8 minute, then take out and drain after cleaning, wherein, what described protective material adopted is DJB-823 solution.
The contact of the fuse switch among the present invention after pyrophosphate copper plating, activation, can be charged to enter groove directly silver-plated, need not silver-platedly in advance, and coating is even, difficult drop-off; Adopt pulse power electrosilvering, can improve quality and the anti-tarnishing ability of silvered film; Conservation treatment makes anti-silver-colored color changeable effect better, and has guaranteed electroconductibility and the weldability that silvering is good.
The present invention has disclosed a kind of silver plating process of contact of fuse switch, by in pyrophosphate copper plating technique, choosing suitable pyrophosphate copper plating solution composition and pH value, the thickness of control pyrophosphate copper plating layer, make that it does not burn, not plating leakage, be difficult for decortication, and can be directly silver-plated, easy to operate, simple possible, safety and environmental protection, and silvered film difficult drop-off, variable color have guaranteed electroconductibility and weldability that silvered film is good.
The above only is embodiments of the invention; be not so limit claim of the present invention; every equivalent structure or equivalent flow process conversion that utilizes specification sheets of the present invention and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (5)
1. the silver plating process of the contact of a fuse switch is characterized in that, may further comprise the steps:
1) plating pre-treatment: adopt organic solvent or weakly alkaline degreaser under middle low temperature environment, to remove the surperficial fluid of the contact of fuse switch, then carry out electropolishing;
2) pyrophosphate copper plating: will in 50-60 ℃ plating bath, carry out pyrophosphate copper plating technique through the contact of fuse switch of plating pre-treatment;
3) silver-plated: as will through direct charged the entering in the silver plating solution of the contact of the fuse switch of pyrophosphate copper plating, to adopt at normal temperatures the pulse power silver-plated;
4) conservation treatment: will be through the contact of the fuse switch of silver-plated processing in protective material under the normal temperature dip-coating 5-8 minute, then take out and drain after cleaning.
2. the silver plating process of the contact of fuse switch according to claim 1, it is characterized in that, the plating bath in the described pyrophosphate copper plating technique comprises cupric pyrophosphate, potassium pyrophosphate and two ammoniacal liquor, and pH value is 7.5-8.5, wherein, the content of described cupric pyrophosphate is 80-90g/L.
3. the silver plating process of the contact of fuse switch according to claim 1 is characterized in that, the electroplating time of described pyrophosphate copper plating is 3-5 minute, and thickness of coating is 1-2 μ m.
4. the silver plating process of the contact of fuse switch according to claim 1 is characterized in that, the argent content in the described silver plating solution is 25-30g/L.
5. the silver plating process of the contact of fuse switch according to claim 1 is characterized in that, described strength of current when silver-plated is 0.5A, and the time is 10-20 minute, and thickness of coating is more than or equal to 4.1 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210416002XA CN102912393A (en) | 2012-10-26 | 2012-10-26 | Silver plating technology of drop-out fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210416002XA CN102912393A (en) | 2012-10-26 | 2012-10-26 | Silver plating technology of drop-out fuse |
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| CN102912393A true CN102912393A (en) | 2013-02-06 |
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| CN201210416002XA Pending CN102912393A (en) | 2012-10-26 | 2012-10-26 | Silver plating technology of drop-out fuse |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105316735A (en) * | 2015-12-15 | 2016-02-10 | 常熟市强盛冲压件有限公司 | Environment-friendly silver-plated contact of fuse |
| CN105870570A (en) * | 2016-04-01 | 2016-08-17 | 苏州欣天新精密机械有限公司 | Preparation method of composite material resonant column |
| CN106591898A (en) * | 2016-12-21 | 2017-04-26 | 贵州振华群英电器有限公司（国营第八九厂） | Silver plating process for contactor plastic compression part |
| CN117512725A (en) * | 2023-11-07 | 2024-02-06 | 东莞市贝沃金属有限公司 | Tin-zinc wire silver plating process for high-current fuse |
Citations (3)
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| JPH0459975A (en) * | 1990-06-29 | 1992-02-26 | Electroplating Eng Of Japan Co | Method for plating electronic parts with silver |
| CN1641813A (en) * | 2005-01-10 | 2005-07-20 | 宁波凌日表面工程有限公司 | Method for controlling additive distribution uniformity of silver-tin anhydride electride contact material |
| CN102181892A (en) * | 2011-05-18 | 2011-09-14 | 中国电子科技集团公司第三十八研究所 | Method for improving bonding force of non-cyanide silver plating layer on nickel layer |
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2012
- 2012-10-26 CN CN201210416002XA patent/CN102912393A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0459975A (en) * | 1990-06-29 | 1992-02-26 | Electroplating Eng Of Japan Co | Method for plating electronic parts with silver |
| CN1641813A (en) * | 2005-01-10 | 2005-07-20 | 宁波凌日表面工程有限公司 | Method for controlling additive distribution uniformity of silver-tin anhydride electride contact material |
| CN102181892A (en) * | 2011-05-18 | 2011-09-14 | 中国电子科技集团公司第三十八研究所 | Method for improving bonding force of non-cyanide silver plating layer on nickel layer |
Non-Patent Citations (4)
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| 储荣邦等: ""焦磷酸盐镀铜生产工艺（I）"", 《材料保护》, vol. 39, no. 10, 31 October 2006 (2006-10-31), pages 62 - 2 * |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105316735A (en) * | 2015-12-15 | 2016-02-10 | 常熟市强盛冲压件有限公司 | Environment-friendly silver-plated contact of fuse |
| CN105870570A (en) * | 2016-04-01 | 2016-08-17 | 苏州欣天新精密机械有限公司 | Preparation method of composite material resonant column |
| CN106591898A (en) * | 2016-12-21 | 2017-04-26 | 贵州振华群英电器有限公司（国营第八九厂） | Silver plating process for contactor plastic compression part |
| CN117512725A (en) * | 2023-11-07 | 2024-02-06 | 东莞市贝沃金属有限公司 | Tin-zinc wire silver plating process for high-current fuse |
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Application publication date: 20130206 |