CN103745876A - Compound contact of copper chromium series used in vacuum interrupter and processing method thereof - Google Patents

Compound contact of copper chromium series used in vacuum interrupter and processing method thereof Download PDF

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Publication number
CN103745876A
CN103745876A CN201310737597.3A CN201310737597A CN103745876A CN 103745876 A CN103745876 A CN 103745876A CN 201310737597 A CN201310737597 A CN 201310737597A CN 103745876 A CN103745876 A CN 103745876A
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copper
contact
chromium
powder
oxygen
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CN103745876B (en
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王文静
王荃
张玉珍
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SHAANXI BAOGUANG VACUUM ELECTRIC DEVICE CO Ltd
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SHAANXI BAOGUANG VACUUM ELECTRIC DEVICE CO Ltd
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Abstract

The present invention discloses a compound contact in copper chromium series used in a vacuum interrupter, including a contact of the top of copper chromium series and an oxygen-free copper of the bottom with thin chromium powder, the contact in copper chromium series and the oxygen-free copper with thin chromium powder are of an integrative structure. The present invention also discloses a processing method, the copper chromium mixed powder and the oxygen-free copper powder with thin chromium powder are pressed and sintered into the integrative structure in a special mold, and then 2 to 6 narrow grooves are processed on the surface. The compound contact of copper chromium series used in a vacuum interrupter gets rid of the current brazing way through organic compositing the contact of copper chromium series and the oxygen-free copper with thin chromium powder, effectively avoiding the dislocation phenomenon in the assembly process, assembling conveniently, effectively decreasing the contact resistance, avoiding the existence of the arcing surface welding line at the same time, indirectly offering an insulation level of the vacuum interrupter, and ensuring the product quality; the processing method is simple and is good in machining quality, saving the materials and reducing the costs.

Description

Copper chromium series composite contact and processing method thereof for vacuum interrupter
Technical field
The invention belongs to composite contact structure and processing technique field thereof, relate to copper chromium series composite contact for a kind of vacuum interrupter, the invention still further relates to the processing method of this copper chromium series composite contact.
Background technology
Vacuum interrupter, for effective higher rated current and operation-current of disjunction, generally all adopts the copper-chromium contact material that connecting-disconnecting function is strong, withstand voltage level is high.Due to the conductivity lower (1/3rd left and right of only having oxygen-free copper) of copper-chromium contact material, and in interrupting process because thermoelectric effect can produce higher temperature rise and load is caused to significant impact.Generally, by the higher copper chromium contact thickness of attenuate cost and reaching uniform electric current, reducing the object of contact resistance with the oxygen-free copper contact tray of 2mm～5mm in silver-copper brazing alloy soldering between contact and contact base.Due to copper chromium contact and oxygen-free copper contact tray complex structure and processing separately respectively, will certainly produce six grooves uneven, in the process of assembling, easily produce inconsistent phenomenon, and after the scolder between contact and contact tray dissolves, in commissure, easily gather, when serious, can scatter arcing face and affect cut-offfing of arc control device.Meanwhile, the weld seam of contact and contact tray is exposed between electrode, and scolder easily evaporates and affects the insulation property of arc control device.
Summary of the invention
The object of this invention is to provide copper chromium series composite contact for a kind of vacuum interrupter, having solved existing copper chromium series composite contact is that copper chromium contact and the soldering of oxygen-free copper contact tray are formed, cause six grooves uneven, in assembling process, easily produce the problem of inconsistent phenomenon.
Another object of the present invention is to provide the processing method of copper chromium series composite contact for above-mentioned vacuum interrupter.
The technical solution adopted in the present invention is, copper chromium series composite contact for vacuum interrupter comprises the copper chromium series contact on top and the oxygen-free copper that thin chromium powder is added in bottom, and copper chromium series contact and the oxygen-free copper that adds thin chromium powder are integral type structure.
Feature of the present invention is also,
Copper chromium series contact diameter is equal to or less than the diameter of the oxygen-free copper that adds thin chromium powder.
Copper chromium series contact thickness is equal to or less than the thickness of the oxygen-free copper that adds thin chromium powder.
On copper chromium series contact face, along different angles, be provided with 2～6 narrow grooves.
Another technical scheme of the present invention is, the processing method of copper chromium series composite contact for vacuum interrupter, copper chromium series composite contact for vacuum interrupter wherein, comprise the copper chromium series contact on top and the oxygen-free copper that thin chromium powder is added in bottom, the oxygen-free copper of copper chromium series contact and the thin chromium powder of interpolation is integral type structure; Specific process is as follows:
Step 1, after adopting dedicated mixer first copper powder and chromium powder to be uniformly mixed into copper chromium mixed-powder, pack in mould, behind floating surface, reinstall the oxygen-free copper powder that adds thin chromium powder, then be not more than under the pressure of 5.5MPa, be pressed into blank after at 950 ℃～1050 ℃ sintering, again after multiple pressure at 600 ℃～680 ℃ annealing in process, obtain copper chromium series composite contact blank;
Step 2, the copper chromium series composite contact blank obtaining in step 1, after different machining, the narrow groove that is 2mm～2.5mm along 2～6 of different angles processing, width by milling machine or engraving machine on contact arcing face again, finally, through deburring, cleaning, obtain copper chromium series composite contact for vacuum interrupter.
Feature of the present invention is also,
Copper chromium mixed-powder comprises 25～50% chromium powder and 50～75% copper powder according to mass percent, and above constituent mass percentage sum is 100%.
In oxygen-free copper powder, add mass percent and be 0～3% thin chromium powder.
Copper chromium series contact diameter is equal to or less than the diameter of the oxygen-free copper that adds thin chromium powder.
Copper chromium series contact thickness is equal to or less than the thickness of the oxygen-free copper that adds thin chromium powder.
The invention has the beneficial effects as follows,
1. copper chromium series composite contact for vacuum interrupter of the present invention, by the oxygen-free copper of copper chromium series contact and the thin chromium powder of interpolation is carried out to organic composite (uniting two into one), removed existing brazing mode, effectively prevented the inconsistent phenomenon in assembling process, easy to assembly, effectively reduce contact resistance, avoided arcing face weld seam to exist simultaneously, the insulation level that arc control device are provided indirectly, has guaranteed product quality.
2. the processing method of copper chromium series composite contact for vacuum interrupter of the present invention, realized the oxygen-free copper synchronous processing of a small amount of thin chromium powder of interpolation of upper copper chromium series contact and bottom, crudy is good, convenient for assembly, save material, reduce costs, in addition by add 0～3% thin chromium powder in oxygen-free copper powder, the coefficient of expansion that has reduced copper chromium series composite contact of the present invention, effectively prevents from being out of shape in the process of soldering.
Accompanying drawing explanation
Fig. 1 is the structural representation of first embodiment of copper chromium series composite contact for vacuum interrupter of the present invention;
Fig. 2 is the structural representation of second embodiment of copper chromium series composite contact for vacuum interrupter of the present invention;
Fig. 3 is the structural representation of the 3rd embodiment of copper chromium series composite contact for vacuum interrupter of the present invention;
Fig. 4 is the vertical view of Fig. 1;
Fig. 5 is the vertical view of Fig. 2;
Fig. 6 is the vertical view of Fig. 3.
In figure, 1. copper chromium series contact, 2. adds the oxygen-free copper of thin chromium powder, 3. narrow groove.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Copper chromium series composite contact for vacuum interrupter of the present invention, referring to Fig. 1,2 and 3, comprises the copper chromium series contact 1 on top and the oxygen-free copper 2 that thin chromium powder is added in bottom, and copper chromium series contact 1 is integral type structure with the oxygen-free copper 2 that adds thin chromium powder.
Copper chromium series contact 1 diameter is equal to or less than the diameter of the oxygen-free copper 2 that adds thin chromium powder.
Copper chromium series contact 1 thickness is equal to or less than the thickness of the oxygen-free copper 2 that adds thin chromium powder.
1 of copper chromium series contact is above provided with 2～6 narrow grooves 3 along different angles.
As shown in Figure 1, diameter and the thickness of the copper chromium on the top series diameter of contact 1 and the oxygen-free copper 2 of the thin chromium powder of interpolation that thickness is less than bottom, Fig. 4 is the vertical view of Fig. 1, as shown in Figure 4, on copper chromium series contact 1, along different angles, is provided with 6 narrow grooves 3.
As shown in Figure 2, diameter and the thickness of the copper chromium on the top series diameter of contact 1 and the oxygen-free copper 2 of the thin chromium powder of interpolation that thickness is less than bottom, Fig. 5 is the vertical view of Fig. 2, as shown in Figure 5,1 of copper chromium series contact is above provided with 6 narrow grooves 3 along different angles.
As shown in Figure 3, the diameter of the copper chromium series contact 1 on top equals the diameter of oxygen-free copper 2 of the thin chromium powder of interpolation of bottom, the thickness of the copper chromium series contact 1 on top is not more than the thickness of oxygen-free copper 2 of the thin chromium powder of interpolation of bottom, Fig. 6 is the vertical view of Fig. 3, as shown in Figure 6,1 of copper chromium series contact is above provided with 6 narrow grooves 3 along different angles.
Copper chromium series composite contact for vacuum interrupter of the present invention, by the oxygen-free copper 2 of the thin chromium powder of interpolation of copper chromium series contact 1 and bottom is carried out to organic composite (uniting two into one), removed existing brazing mode, effectively prevented the inconsistent phenomenon in assembling process, easy to assembly, effectively reduce contact resistance, avoided arcing face weld seam to exist simultaneously, the insulation level that arc control device are provided indirectly, has guaranteed product quality.
The processing method of copper chromium series composite contact for above-mentioned vacuum interrupter, specific process is as follows:
Step 1, adopt dedicated mixer first copper powder and chromium powder evenly to be mixed (wherein: in copper chromium mixed powder, chromium powder mass percent is 25～50%, copper powder mass percent accounts for 50～75%, above constituent mass percentage sum is 100%) pack in special mould, behind floating surface, reinstall the oxygen-free copper powder of the thin chromium powder that adds 0～3%, then under the pressure of 5.5MPa, be pressed into blank sintering at 950 ℃～1050 ℃ being not more than, again after multiple pressure, annealing in process at 600 ℃～680 ℃, finally obtains copper chromium series composite contact blank;
Step 2, the copper chromium series composite contact blank obtaining in step 1, after different machining, the narrow groove that is 2mm～2.5mm along 2～6 of different angles processing, width by milling machine or engraving machine on contact arcing face again, finally, through deburring, cleaning, obtain copper chromium series composite contact for vacuum interrupter.
The processing method of copper chromium series composite contact for vacuum interrupter of the present invention, realized the synchronous processing of the oxygen-free copper of the copper chromium series contact on top and the thin chromium powder of interpolation of bottom, crudy is good, convenient for assembly, save material, reduce costs, in addition by add 0～3% thin chromium powder in oxygen-free copper powder, the coefficient of expansion that has reduced copper chromium series composite contact of the present invention, prevents from being out of shape in brazing process.
Embodiment 1
Step 1, adopt dedicated mixer first copper powder and chromium powder evenly to be mixed (wherein: in copper chromium mixed powder, chromium powder mass percent is 25%, copper powder mass percent accounts for 75%) pack in special mould, the oxygen-free copper powder that reinstalls the thin chromium powder that adds 3% behind floating surface is then pressed into blank sintering at 1000 ℃ under the pressure of 5.5MPa, then after multiple pressure, annealing in process at 650 ℃, finally obtains copper chromium series composite contact blank;
Step 2, in step 1, obtain copper chromium series composite contact blank, after different machining, the narrow groove that is 2mm～2.5mm along 6 of different angles processing, width by milling machine on contact arcing face again, finally, through deburring, cleaning, obtain copper chromium series composite contact for vacuum interrupter.
Embodiment 2
Step 1, adopt dedicated mixer first copper powder and chromium powder evenly to be mixed (wherein: in copper chromium mixed powder, chromium powder mass percent is 50%, copper powder mass percent accounts for 50%) pack in special mould, the oxygen-free copper powder that reinstalls the thin chromium powder that adds 2% behind floating surface is then pressed into blank sintering at 950 ℃ under the pressure of 5.0MPa, then after multiple pressure, annealing in process at 680 ℃, finally obtains copper chromium series composite contact blank;
Step 2, in step 1, obtain copper chromium series composite contact blank, after different machining, the narrow groove that is 2mm～2.5mm along 4 of different angles processing, width by engraving machine on contact arcing face again, finally, through deburring, cleaning, obtain copper chromium series composite contact for vacuum interrupter.
Embodiment 3
Step 1, adopt dedicated mixer first copper powder and chromium powder evenly to be mixed (wherein: in copper chromium mixed powder, chromium powder mass percent is 35%, copper powder mass percent accounts for 65%, and above constituent mass percentage sum is 100%) pack in special mould, behind floating surface, reinstall the oxygen-free copper powder of the thin chromium powder that adds 0%, then under the pressure of 5.5MPa, be pressed into blank sintering at 1050 ℃, after multiple pressure, annealing in process at 600 ℃, finally obtains copper chromium series composite contact blank again;
Step 2, in step 1, obtain copper chromium series composite contact blank, after different machining, the narrow groove that is 2mm～2.5mm along 2 of different angles processing, width by engraving machine on contact arcing face again, finally, through deburring, cleaning, obtain copper chromium series composite contact for vacuum interrupter.

Claims (9)

1. copper chromium series composite contact for vacuum interrupter, it is characterized in that, comprise the copper chromium series contact (1) on top and the oxygen-free copper (2) that thin chromium powder is added in bottom, the oxygen-free copper (2) of described copper chromium series contact (1) and the thin chromium powder of described interpolation is integral type structure.
2. copper chromium series composite contact for vacuum interrupter according to claim 1, is characterized in that, described copper chromium series contact (1) diameter is equal to or less than the diameter of the oxygen-free copper (2) that adds thin chromium powder.
3. copper chromium series composite contact for vacuum interrupter according to claim 1, is characterized in that, described copper chromium series contact (1) thickness is equal to or less than the thickness of the oxygen-free copper (2) of the thin chromium powder of described interpolation.
4. according to copper chromium series composite contact for the arbitrary described vacuum interrupter of claim 1～3, it is characterized in that, on described copper chromium series contact (1) face, along different angles, be provided with 2～6 narrow grooves (3).
5. the processing method of copper chromium series composite contact for vacuum interrupter, it is characterized in that, copper chromium series composite contact for vacuum interrupter wherein, comprise the copper chromium series contact (1) on top and the oxygen-free copper (2) that thin chromium powder is added in bottom, the oxygen-free copper (2) of described copper chromium series contact (1) and the thin chromium powder of interpolation is integral type structure; Specific process is as follows:
Step 1, adopting dedicated mixer first copper powder and chromium powder to be uniformly mixed into copper chromium mixed-powder enters in mould, behind floating surface, reinstall the oxygen-free copper powder that adds thin chromium powder, then be not more than under the pressure of 5.5MPa, be pressed into blank after at 950 ℃～1050 ℃ sintering, again after multiple pressure at 600 ℃～680 ℃ annealing in process, obtain copper chromium series composite contact blank;
Step 2, the copper chromium series composite contact blank obtaining in step 1, after different machining, the narrow groove that is 2mm～2.5mm along 2～6 of different angles processing, width by milling machine or engraving machine on contact arcing face again, finally, through deburring, cleaning, obtain copper chromium series composite contact for vacuum interrupter.
6. the processing method of copper chromium series composite contact for vacuum interrupter according to claim 5, is characterized in that, described chromiumcopper powder comprises 25～50% chromium and 50～75% copper according to amount percentage, and above constituent mass percentage sum is 100%.
7. the processing method of copper chromium series composite contact for vacuum interrupter according to claim 5, is characterized in that, adds mass percent and be 0～3% thin chromium powder in described oxygen-free copper powder.
8. the processing method of copper chromium series composite contact for vacuum interrupter according to claim 5, is characterized in that, described copper chromium series contact (1) diameter is equal to or less than the diameter of the oxygen-free copper (2) that adds thin chromium powder.
9. the processing method of copper chromium series composite contact for vacuum interrupter according to claim 5, is characterized in that, described copper chromium series contact (1) thickness is equal to or less than the thickness of the oxygen-free copper (2) that adds thin chromium powder.
CN201310737597.3A 2013-12-24 2013-12-24 Vacuum interrupter copper chromium series composite contact and processing method thereof Active CN103745876B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05217473A (en) * 1991-11-06 1993-08-27 Meidensha Corp Manufacture of electrode material
CN101350255A (en) * 2008-08-12 2009-01-21 浙江亚通金属陶瓷有限公司 Cuprum chromium-cuprum composite contact material and manufacturing method thereof
CN201594490U (en) * 2010-01-28 2010-09-29 浙江新安江开关有限公司 Vacuum on-off tube with novel contact structure
CN201655661U (en) * 2010-04-01 2010-11-24 吉林永大电气开关有限公司 Vacuum arc extinguish chamber contact
CN203659743U (en) * 2013-12-24 2014-06-18 陕西宝光真空电器股份有限公司 Composite contact of copper chromium series used for vacuum interrupter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05217473A (en) * 1991-11-06 1993-08-27 Meidensha Corp Manufacture of electrode material
CN101350255A (en) * 2008-08-12 2009-01-21 浙江亚通金属陶瓷有限公司 Cuprum chromium-cuprum composite contact material and manufacturing method thereof
CN201594490U (en) * 2010-01-28 2010-09-29 浙江新安江开关有限公司 Vacuum on-off tube with novel contact structure
CN201655661U (en) * 2010-04-01 2010-11-24 吉林永大电气开关有限公司 Vacuum arc extinguish chamber contact
CN203659743U (en) * 2013-12-24 2014-06-18 陕西宝光真空电器股份有限公司 Composite contact of copper chromium series used for vacuum interrupter

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