CN1030715A - Contact-welding technology - Google Patents
Contact-welding technology Download PDFInfo
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- CN1030715A CN1030715A CN 87103022 CN87103022A CN1030715A CN 1030715 A CN1030715 A CN 1030715A CN 87103022 CN87103022 CN 87103022 CN 87103022 A CN87103022 A CN 87103022A CN 1030715 A CN1030715 A CN 1030715A
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- contact
- welding
- welding technology
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- transition zone
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Abstract
A kind of contact-welding technology, at the face of weld nickel plating and the silver-plated transition zone of copper molybdenum alloy contact head, the oxygen-free copper contact handle after M2370 special welding machine increases temperature high pressure and processes is realized Diffusion Welding.This welding procedure has promptly guaranteed the welding quality of contact, has reduced the energy and material consumption again significantly, improves 10 times of work efficiency, and its yield rate can reach 100%, provides economy, valid approach for producing vacuum contactor in batches with arc-chutes.
Description
The invention belongs to the improvement of contact-welding technology.
Contact involved in the present invention is that it is made up of contact handle and contact head two parts for the core component of vacuum contactor with arc-chutes, and the contact handle is made with oxygenless copper material, and the contact head is made with the copper molybdenum alloy material.Mechanical performance and electric property to this contact all have strict requirement, and the welding of contact handle and contact head should be solid and reliable, and its solder side can bear the pulling force of 2600KG at least, and is not drawn back.Solder side should have excellent conducting performance, to guarantee that the arc-chutes galvanic circle is by 100 ampere-hours, its contact resistance is less than 100 micro-ohms, and guarantee that the transient current that arc-chutes pass through reaches 13600 amperes on the galvanic circle, 8000 amperes of specified dash currents in conduction 100 microseconds, type approval test making capacity are can operate as normal under 6000 amperes the situation.The manufacturing process of existing contact is a kind of technology of concentrating heating in a vacuum with high frequency, promptly is that (its vacuum requires to reach 5 * 10 in high vacuum system
-6More than the torr) oxygen-free copper slowly is heated to fusing, directly welding-on is on the surface of contact head, and slowly cooling cooling forms the contact blank again, and the dimensional requirement of pressing the contact handle is partly carried out machining to the anaerobic of welding-on and is formed.The contact that adopts this technology to make, whole process need is about 10 hours, thereby energy resource consumption is big, and production efficiency is low.And the contact blank should have enough allowance, and material consumption is also bigger.The copper molybdenum alloy contact head of making in strict ratio particularly, after high frequency is concentrated heating, to cause copper in the alloy inwardly or to external diffusion, make alloy ratio suffer certain destruction, and the strict ratio of contact head copper molybdenum alloy is the key factor that guarantees the contact performance, make consistency of product poor, its yield rate is only about 70%.
In view of the problem that above-mentioned prior art exists, task of the present invention provides a kind of contact diffusion technology for welding that adds transition zone and HTHP.
Main points of the present invention are, add the transition zone that electric conductivity is good at the copper molybdenum alloy contact head face of weld after processing, with the welding of the oxygen-free copper contact handle after the processing, under the condition of HTHP, make it reach Diffusion Welding again.Transition zone adopts nickel coating and silver coating, and coating has increased firmness behind sintering, under the condition of HTHP, makes the Cu counterdiffusion mutually in Ni, Ag and the contact handle in the coating, forms the NiAgCu alloy-layer.Contact handle and contact head are welded together firmly.The fusing point of NiAgCu alloy-layer reaches 840 ℃～850 ℃, and the fusing point of soldering when being higher than whole arc-chutes general assembly, but be lower than the fusing point of Cu is not so have influence to contact during to GuMO alloy ratio in the contact head and arc-chutes general assembly soldering.Pressurization can promote diffusion, and improves the tensile strength of solder side.
The present invention has obtained good technological effect and remarkable economic efficiency.Through evidence, the tensile strength of contact handle and contact head solder side is at 2700KG.Its contact-making surface resistance was about 44 micro-ohms when 100 Ampere currents were passed through in the arc-chutes galvanic circle.Through contacting unloaded mechanical endurance test and still good for 1,680,000 times 1575 Ampere currents break-makes 6352 times.This technology can improve 10 times of work efficiency, and reduces energy resource consumption and material consumption significantly.Consistency of product is good, and its yield rate can reach 100%.Thereby significantly reduce product cost.
The present invention is described in further detail below with reference to accompanying drawing.
Accompanying drawing is the concrete welding procedure schematic diagram of the present invention.
1. the copper molybdenum alloy contact head of having processed (1) is through burning H
2Handle, temperature is 800 ℃～850 ℃, and 10 minutes time, purification is degassed.
2. burning H
2Nickel coating (2) on the face of weld of the copper molybdenum alloy contact head (1) after the processing, thickness is 3～5 μ, then at H
2To the coating sintering, temperature is 800 ℃～850 ℃ in the stove, 10 minutes time.Its coating does not allow defectives such as bubble or peeling oxidation.
3. silver coating (3) on the surface of nickel coating (2), thickness is 5～7 μ, is burning H then
2Sintering in the stove, temperature are 800 ℃～850 ℃, 10 minutes time.Its coating does not allow defectives such as bubble or peeling oxidation.
Through processing oxygen-free copper contact handle (4), behind contact head (1) location of locating stamen bar (5) and having electroplated, put into the vertical welding chuck (6) of Л M2370 special welding machine, build welding bell jar (7), and to the welding bell jar bled 10 minutes, its vacuum is 10
-1Torr, and then bell jar charged into 80% N
2Gas and 20% H
2Gas, inflationtime are 3 minutes.
5. the bonding machine with Л M2370 special use carries out big electric current high-temperature soldering, and (electric current is about 70 amperes), 3～3.5 atmospheric pressure simultaneously pressurize.Observe the coating fusing during welding, temperature is at 850 ℃～900 ℃, be incubated the Cu counterdiffusion mutually in the Ni, the Ag that made in 1 minute in the coating and the contact handle, forms the NiAgCu alloy-layer, and fast cooling cools off, and contact handle and contact head weld together firmly.The fusing point of NiAgCu alloy-layer reaches 840 ℃～850 ℃, and the fusing point when being higher than whole arc-chutes general assembly soldering, but be lower than the fusing point of Cu is not so have influence to the contact head during to contact head copper molybdenum alloy ratio and arc-chutes general assembly soldering.Add 3～3.5 atmospheric pressure, can promote diffusion, and improve the tensile strength of solder side.The contact welding process only needs 1 hour, and its yield rate reaches 100%.
This welding procedure has promptly guaranteed the welding quality of contact, has improved production efficiency again, has reduced the energy and material consumption, has reduced product cost, for batch process provides economy, valid approach.
Claims (7)
1, a kind of contact-welding technology, it is characterized in that on the face of weld of the contact head that copper molybdenum alloy is made, adding transition zone, in special welding equipment, earlier bell jar is taken out low vacuum, inflation again, the oxygen-free copper contact handle after increasing temperature high pressure then and processing is realized Diffusion Welding.
2,, it is characterized in that nickel plating 3～5 μ of transition zone elder generation, at H by the described contact-welding technology of claim 1
2Sintering in the stove, temperature are 800 ℃～850 ℃, and 10 minutes time is then at silver-plated 5～7 μ, at H
2Sintering in the stove, temperature are 800 ℃～850 ℃, 10 minutes time.
3, by the described contact-welding technology of claim 1, it is characterized in that it is 10 that bell jar is taken out low vacuum
-1Torr.
4,, it is characterized in that bell jar filled 80% N by the described contact-welding technology of claim 1
2Gas and 20% H
2Gas, inflationtime are 3 minutes.
5, by the described contact-welding technology of claim 1, it is characterized in that welding temperature is 850 ℃～900 ℃, be incubated 1 minute, make the Ni in the transition zone, the Cu counterdiffusion mutually of Ag and contact handle, formation NiAgCu alloy-layer, fast cooling cools off.
6, by the described contact-welding technology of claim 1, pressurization when heating when it is characterized in that welding, its pressure is 3～3.5 atmospheric pressure.
7, by the described contact-welding technology of claim 1, it is characterized in that special welding equipment is Л M2370 bonding machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87103022 CN1030715A (en) | 1987-07-23 | 1987-07-23 | Contact-welding technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87103022 CN1030715A (en) | 1987-07-23 | 1987-07-23 | Contact-welding technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1030715A true CN1030715A (en) | 1989-02-01 |
Family
ID=4814231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87103022 Pending CN1030715A (en) | 1987-07-23 | 1987-07-23 | Contact-welding technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1030715A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102303193A (en) * | 2011-08-05 | 2012-01-04 | 佛山市海欣光电科技有限公司 | Welding and machining method of electrode current-conducting parts such as terminal and current-conducting rod of magnetron |
| CN102345145A (en) * | 2011-09-30 | 2012-02-08 | 成都四威高科技产业园有限公司 | Method for electroplating surface of molybdenum and copper alloy |
| CN105590772A (en) * | 2015-12-29 | 2016-05-18 | 天津平高智能电气有限公司 | Once seal-exhaust method of vacuum explosion chamber |
| CN105728929A (en) * | 2016-04-21 | 2016-07-06 | 长沙众聚达精密机械有限公司 | Nanometer diffusion bonding method for Cu and CuCrZr alloy |
-
1987
- 1987-07-23 CN CN 87103022 patent/CN1030715A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102303193A (en) * | 2011-08-05 | 2012-01-04 | 佛山市海欣光电科技有限公司 | Welding and machining method of electrode current-conducting parts such as terminal and current-conducting rod of magnetron |
| CN102303193B (en) * | 2011-08-05 | 2014-05-21 | 佛山市海欣光电科技有限公司 | Welding and machining method of electrode current-conducting parts such as terminal and current-conducting rod of magnetron |
| CN102345145A (en) * | 2011-09-30 | 2012-02-08 | 成都四威高科技产业园有限公司 | Method for electroplating surface of molybdenum and copper alloy |
| CN105590772A (en) * | 2015-12-29 | 2016-05-18 | 天津平高智能电气有限公司 | Once seal-exhaust method of vacuum explosion chamber |
| CN105728929A (en) * | 2016-04-21 | 2016-07-06 | 长沙众聚达精密机械有限公司 | Nanometer diffusion bonding method for Cu and CuCrZr alloy |
| CN105728929B (en) * | 2016-04-21 | 2018-07-24 | 长沙众聚达精密机械有限公司 | The nanodiffusion connection method of Cu and CuCrZr alloys |
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| WD01 | Invention patent application deemed withdrawn after publication |