CN1008151B - Method for mfg. electric contact with predeposited solder layer - Google Patents
Method for mfg. electric contact with predeposited solder layerInfo
- Publication number
- CN1008151B CN1008151B CN 87103992 CN87103992A CN1008151B CN 1008151 B CN1008151 B CN 1008151B CN 87103992 CN87103992 CN 87103992 CN 87103992 A CN87103992 A CN 87103992A CN 1008151 B CN1008151 B CN 1008151B
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- China
- Prior art keywords
- electrical contact
- solder layer
- solder
- layer
- powder
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- 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.)
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Abstract
The present invention relates to an electrical contact manufactured by the solid phase sintering technology of powder metallurgy technology and a method. The present invention is characterized in that mixed powder is pressed into pressing blanks with zigzag grooves and repressed in a mould cavity after the pressing blanks are sintered; solder powder are laid on the surfaces of the zigzag grooves of the sintered blanks, and the electrical contact with a prefabrication solder layer is obtained by repressing. The electrical contact has the advantages of good solderability, stable soldering quality, soldering technology simplification and convenient assembly, and the present invention is favorable for realizing mechanization soldering, increasing productivity, saving silver and improving labour conditions.
Description
The invention belongs to PM technique and make the electrical contact field.
Still the prefabricated solder layer electrical contact of being with that does not have solid-phase sintering-multiple compression technology manufacturing in the market.Existing sintered combined electrical contact does not have solder.In order to improve the anti-weldering fusibleness of sintered combined electrical contact, in sintered combined electrical contact, add metal oxide or graphite component usually.In order to make the electrical contact surface have lower melting welding intensity, United States Patent (USP) 3489531 provides the method for making the multi-layer sintering contact, this kind multi-layer sintering contact is by the material of low melting welding intensity, Ag-C for example, Ag-CdO etc. make the main contact layer and by the material of lower melting welding intensity, for example, contain the Ag-C that more graphite component or more metal oxide are formed than main contact layer, Ag-CdO etc. make superficial layer, and three layers of composition of welding composite bed (silver layer or copper layer) of being connected with the supporting mass metal of main contact layer, just lack the superficial layer outside the main contact layer in the multilayer metal compound contact material in GB5587-85.For the higher refractory metal contact of content, mostly adopt the impregnation technology manufacturing as silver-colored tungsten, copper tungsten etc., in order to improve the weldability of refractory metal contact, United States Patent (USP) 3,359,623 provide the welding composite bed be the refractory metal contact on the Combination Welding surface of Fe-Ag, Fe-CU, Ni-Ag etc.In the appendix F of GB8320-87, copper tungsten contact and silver tungsten contact just have welding composite bed one bronze medal layer or silver layer.All do not have prefabricated solder layer on the solder side of the above these electrical contact.
Switchgear plant not with the welding of prefabricated solder layer electrical contact and supporting mass, mostly adopts the manual soldering of flame to existing, and soldering in employing resistance brazing and the protective atmosphere is also arranged.Solder adopts silver-base solder, and will fully use brazing mixture.The banded solder of domestic widely-used paper tinsel, brazing wire.External powder brazing alloy, the paste solder of also generally adopting.Huatong Switch Factory, Shanghai has just used paste solder from the soldering of moulding the electrical contact the shell air switch that US Westinghouse company introduces.Shenyang high voltage switch gear factory was once in blocks with the mixed-powder compacting of solder and brazing flux, replaced original silver soldering sheet to carry out the resistance brazing of copper tungsten 80 and red copper seat.Guilin Inst. of Electrical Equipment Science is in the improvement of money base powder metallurgy contact welding performance " to the containing WC(W) " literary composition; for machinery, the physical property that improves contact material; on the annular knurl face of the electrical contact that adopts impregnation technology to make; apply and put the silver soldering sheet; place fusing in the special atmosphere oven then; through surface treatment, obtain spreading the electrical contact of multiple silver solder.In the clear 48-13301 of Japan Patent, also once introduced silver-that face of cadmium layer, and adopted repeatedly and electroplate at the silver-cadmium oxide alloy material of single face oxidation processes, and several metal levels of electroplating deposition successively, constitute silver solder, obtain electrical contact with solder layer.
Purpose of the present invention does not increase any operation and equipment on the basis of the original production technology of electrical contact, a kind of method that adopts solid-phase sintering in the PM technique-multiple compression technology manufacturing with prefabricated solder layer electrical contact is provided.
When being first pressing, the characteristics of manufacture method of the present invention will extrude the groove of a lot of band saw profiles of tooth on pressed compact bottom surface or the welding composite bed with band saw profile of tooth pressure head, through oversintering, sintering briquette behind the sintering is placed in the multiple pressing mold, again on that face of band saw profile of tooth, the powder brazing alloy that tiling one deck had purified, be placed on the plane pressure head, carry out multiple pressure, resulting product is exactly the electrical contact with prefabricated solder layer.The selection of the classification of powder brazing alloy should be decided according to the characteristic of contact members and soldered not material, thereby also determines whether need to cooperate with suitable brazing flux when soldering.
The present invention has following advantage and good effect:
1. manufacturing process is simple, just can produce under original production technology of electrical contact and appointed condition.
Powder brazing alloy can be quantitatively in advance on electrical contact, controlled the consumption of silver solder.
3. the type of powder brazing alloy and composition can be arbitrarily selected according to the characteristic of two weldments.
4. prefabricated solder is evenly distributed, convenient welding, the brazing filler metal steady quality.
5. prefabricated solder is to carry out pressing again in the operation, does not need post bake (molten shop solder once, soldering is once), also avoided repeatedly electroplating and electroplate liquid in contain the pollution of cyanide, saved the energy.
Description of drawings:
The present invention has following two most preferred embodiments.
Embodiment one, with prefabricated solder layer contact CAgW(40) manufacture method (referring to accompanying drawing 5):
With silver powder and the tungsten powder weight ratio by 60: 40, ball milling mixed 4～6 hours in blender, with the mixed-powder weighing of mixed silver-colored tungsten 40, fell powder in compression mold cavities, earlier with the slight compacting of concora crush head, changed the pressure head of band saw profile of tooth again, at 2～4 tons/centimetre
2First pressure pressure under, extrude the pressed compact of bottom surface band saw profile of tooth groove.Again pressed compact is placed on in the stainless steel boat in the sintering furnace of hydrogen shield,, carries out sintering, obtain sintering briquette as shown in Figure 1 860～890 ℃ of insulations 2～3 hours.Sintering briquette is put into multiple compression mold cavities, the silver-bearing copper phosphorus brazing alloy powder that tiling one deck has weighed up on sintering briquette zigzag grooved surface is put into the concora crush head at 9～13 tons/centimetre again
2Multiple pressure pressure under suppress, obtain being with prefabricated silver-bearing copper phosphorus brazing alloy layer contact CAgW(40), as shown in accompanying drawing 2.Solder layer thickness is generally 0.25 millimeter, and large tracts of land can be 0.30 millimeter.
Embodiment two, with prefabricated solder layer contact CCUC(5) manufacture method (referring to accompanying drawing 6):
With copper powder and aquadag powder weight ratio by 95: 5, ball milling mixed 4～6 hours in blender, with the weighing of mixed copper powdered graphite, fall powder in compression mold cavities, wipe off, gently press, deserve to be called copper powder again and be upside down on the copper graphite compound of gently pressing, wipe, use the slight compacting of concora crush head off with the concora crush head, change the pressure head of band saw profile of tooth again, at 2～3.5 tons/centimetre
2First pressure pressure under; the pressed compact that extrusion is made up of the solder side composite bed of copper graphite and band saw profile of tooth groove; with paper pressed compact is cladded; be placed in the alumina packing with the stainless steel boat in the sintering furnace of hydrogen shield; carry out sintering in 2～4 hours 920～950 ℃ of insulations, obtain sintering briquette as shown in Figure 3.Sintering briquette is put into multiple compression mold cavities, the silver-bearing copper phosphor powder solder that tiling one deck has weighed up on sintering briquette zigzag grooved surface is put into the concora crush head, at 5～7 tons/centimetre again
2Multiple pressure pressure under suppress, obtain contact CCUC(5 with prefabricated silver-bearing copper phosphorus brazing alloy layer), as shown in Figure 4.Solder layer thickness is generally 0.25 millimeter, large-arealy can be 0.3 millimeter.
Embodiment one and two gained contact members and red copper part carry out oxygen-acetylene flame brazing can obtain satisfied effect, but with other copper alloy part solderings the time, then needs to cooperate with brazing flux, also can obtain satisfied effect after the soldering.
Claims (2)
1, a kind of with the method for PM technique manufacturing with prefabricated solder layer electrical contact, it is characterized in that for being pressed into the zigzag groove on the solder side of the electrical contact of containing metal oxide or graphite constituent element not or on the welding composite bed for the electrical contact that contains metal oxide or graphite constituent element.Obtain sintering briquette behind the sintering, again sintering briquette is put into multiple compression mold cavities, on the zigzag groove, go up solder powder, pave, press again again, obtain electrical contact with prefabricated solder layer.
2, the electrical contact that makes of method according to claim 1 with prefabricated solder layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87103992 CN1008151B (en) | 1987-06-08 | 1987-06-08 | Method for mfg. electric contact with predeposited solder layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87103992 CN1008151B (en) | 1987-06-08 | 1987-06-08 | Method for mfg. electric contact with predeposited solder layer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN87103992A CN87103992A (en) | 1988-09-28 |
| CN1008151B true CN1008151B (en) | 1990-05-30 |
Family
ID=4814676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87103992 Expired CN1008151B (en) | 1987-06-08 | 1987-06-08 | Method for mfg. electric contact with predeposited solder layer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1008151B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106548880B (en) * | 2015-09-21 | 2019-08-23 | 上海天固焊接器材有限公司 | A kind of Ag-based electrical contact that can be directly brazed and its manufacturing method |
| CN105355474B (en) * | 2015-11-20 | 2018-05-25 | 温州宏丰电工合金股份有限公司 | A kind of AgW50 for breaker answers Cu contact materials and preparation method thereof |
| CN105448547A (en) * | 2015-12-11 | 2016-03-30 | 平高集团有限公司 | Arcing contact and high-voltage switch employing same |
| CN105397279B (en) * | 2015-12-29 | 2018-01-05 | 陕西斯瑞新材料股份有限公司 | A kind of welding method of copper chromium on-load switch component |
| WO2018007520A1 (en) * | 2016-07-08 | 2018-01-11 | Abb Schweiz Ag | Use of an alloy as a brazing alloy for an electric switch braze joint, an electric switch braze joint, an electric switch and a method of producing an electric switch braze joint |
| CN106216793A (en) * | 2016-08-23 | 2016-12-14 | 上海和伍复合材料有限公司 | A kind of method covering solder layer |
| CN111054927A (en) * | 2019-12-03 | 2020-04-24 | 同济大学 | Aluminum/magnesium/aluminum composite board with interface structure design and powder hot-pressing preparation method thereof |
| CN114749750B (en) * | 2021-12-31 | 2024-01-30 | 上海工程技术大学 | Forming control method of braze welding joint for 3D printing product |
-
1987
- 1987-06-08 CN CN 87103992 patent/CN1008151B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN87103992A (en) | 1988-09-28 |
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| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C53 | Correction of patent for invention or patent application | ||
| CB02 | Change of applicant information |
Co-applicant after: Hunan Switch Factory |
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Free format text: CORRECT: CO-APPLICANT TO: HUNAN SWITCH FACTORY |
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| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |