CN103745876B - Vacuum interrupter copper chromium series composite contact and processing method thereof - Google Patents
Vacuum interrupter copper chromium series composite contact and processing method thereof Download PDFInfo
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- CN103745876B CN103745876B CN201310737597.3A CN201310737597A CN103745876B CN 103745876 B CN103745876 B CN 103745876B CN 201310737597 A CN201310737597 A CN 201310737597A CN 103745876 B CN103745876 B CN 103745876B
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Abstract
The invention discloses a kind of vacuum interrupter copper chromium series composite contact, add the oxygen-free copper of thin chromium powder including the copper chromium series contact on top and bottom, copper chromium series contact and the oxygen-free copper adding thin chromium powder are integral type structure. The invention also discloses its processing method, after integral for oxygen-free copper powder compacting sintering in special die of copper chromium mixed-powder and the thin chromium powder of interpolation, namely obtaining in 2～6 narrow slot of Surface Machining can. Vacuum interrupter copper chromium series composite contact of the present invention, by the oxygen-free copper of copper chromium series composite contact and the thin chromium powder of interpolation is carried out organic composite, eliminate existing brazing mode, effectively prevent the inconsistent phenomenon in assembling process, easy to assembly, effectively reduce contact resistance, avoid arcing face weld seam simultaneously and exist, indirectly provide the dielectric level of arc-chutes, it is ensured that product quality; Its processing method is simple, and crudy is good, saves material, reduces cost.
Description
Technical field
The invention belongs to composite contact structure and processing technique field thereof, relate to a kind of vacuum interrupter copper chromium series composite contact, the processing method that the invention still further relates to this copper chromium series composite contact.
Background technology
Vacuum interrupter, for the higher rated current of effective disjunction and operation-current, generally all adopts the copper-chromium contact material that connecting-disconnecting function voltage levels strong, resistance to is high. Due to the electrical conductivity of copper-chromium contact material relatively low (only about 1/3rd of oxygen-free copper), and owing to pyroelectric effect can produce higher temperature rise and load is caused significant impact in interrupting process. Under normal circumstances, then reach uniform electric current by thinning relatively costly copper chromium contact thickness and between contact and contact base with the oxygen-free copper contact tray of 2mm～5mm in silver-copper brazing alloy soldering, reduce the purpose of contact resistance. Owing to copper chromium contact and oxygen-free copper contact tray structure be complicated and individually processes, six grooves will certainly be produced uneven, the process of assembling easily produces inconsistent phenomenon, and the solder between contact and contact tray dissolve after easily gather in commissure, can scatter arcing face time serious and affect cut-offfing of arc-chutes. Meanwhile, the weld seam of contact and contact tray exposes in-between the electrodes, and solder easily evaporates and affects the insulating properties of arc-chutes.
Summary of the invention
The processing method that it is an object of the invention to provide a kind of vacuum interrupter copper chromium series composite contact.
The technical solution adopted in the present invention is, the vacuum interrupter processing method of copper chromium series composite contact, wherein vacuum interrupter copper chromium series composite contact, including being positioned at the copper chromium series contact of upper position and being positioned at the oxygen-free copper adding thin chromium powder of lower position, copper chromium series contact and the oxygen-free copper adding thin chromium powder are integral type structure;Specific process is as follows:
Step 1, adopt dedicated mixer that copper powder and chromium powder are first uniformly mixed into copper chromium mixed-powder and enter in mould, described copper chromium mixed-powder includes the copper of chromium that mass percent is 25～50% and 50～75%, the mass percent sum of above composition is 100%, the oxygen-free copper powder adding thin chromium powder is reinstalled after smooth out surface, it is 0～3% that described thin chromium powder accounts for the mass percent in oxygen-free copper powder, then sinter at 950 DEG C～1050 DEG C after the pressure being not more than 5.5MPa makes blank, make annealing treatment at 600 DEG C～680 DEG C then through after multiple pressure, obtain copper chromium series composite contact blank,
Step 2, in the copper chromium series composite contact blank that step 1 obtains, after different machining, again through milling machine or engraving machine on contact arcing face along different angles process 2～6, width be the narrow groove of 2mm～2.5mm, finally, through deburring, cleaning, namely obtain vacuum interrupter copper chromium series composite contact.
The feature of the present invention also resides in,
The diameter of copper chromium series contact is equal to or less than the diameter of the oxygen-free copper adding thin chromium powder.
The thickness of copper chromium series contact is equal to or less than the thickness of the oxygen-free copper adding thin chromium powder.
The invention has the beneficial effects as follows,
1. vacuum interrupter copper chromium series composite contact of the present invention, by the oxygen-free copper of copper chromium series contact and the thin chromium powder of interpolation is carried out organic composite (uniting two into one), eliminate existing brazing mode, effectively prevent the inconsistent phenomenon in assembling process, easy to assembly, effectively reduce contact resistance, avoid arcing face weld seam simultaneously and exist, indirectly provide the dielectric level of arc-chutes, it is ensured that product quality.
2. the processing method of vacuum interrupter copper chromium series composite contact of the present invention, achieve the copper chromium series contact being positioned at upper position and be positioned at the oxygen-free copper synchronous processing adding a small amount of thin chromium powder of lower position, crudy is good, convenient for assembly, save material, reduce cost, additionally by the thin chromium powder adding 0～3% in oxygen-free copper powder, reduce the coefficient of expansion of copper chromium series composite contact of the present invention, effectively prevent from deforming in the process of soldering.
Accompanying drawing explanation
Fig. 1 is the structural representation of vacuum interrupter copper chromium first embodiment of series composite contact of the present invention;
Fig. 2 is the structural representation of vacuum interrupter copper chromium second embodiment of series composite contact of the present invention;
Fig. 3 is the structural representation of vacuum interrupter copper the 3rd embodiment of chromium series composite contact of the present invention;
Fig. 4 is the top view of Fig. 1;
Fig. 5 is the top view of Fig. 2;
Fig. 6 is the top view of Fig. 3.
In figure, 1. copper chromium series contact, 2. adds the oxygen-free copper of thin chromium powder, 3. narrow groove.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Vacuum interrupter copper chromium series composite contact of the present invention, referring to Fig. 1,2 and 3, including being positioned at the copper chromium series contact 1 of upper position and being positioned at the oxygen-free copper 2 adding thin chromium powder of lower position, copper chromium series contact 1 and the oxygen-free copper 2 adding thin chromium powder are integral type structure.
The diameter of copper chromium series contact 1 is equal to or less than the diameter of the oxygen-free copper 2 adding thin chromium powder.
The thickness of copper chromium series contact 1 is equal to or less than the thickness of the oxygen-free copper 2 adding thin chromium powder.
Copper chromium series contact 1 is provided with 2～6 narrow grooves 3 along different angles.
As shown in Figure 1, it is positioned at the diameter of the copper chromium series contact 1 of upper position and thickness less than the diameter of the oxygen-free copper 2 adding thin chromium powder being positioned at lower position and thickness, Fig. 4 is the top view of Fig. 1, as shown in Figure 4, copper chromium series contact 1 is provided with 6 narrow grooves 3 along different angles.
As shown in Figure 2, it is positioned at the diameter of the copper chromium series contact 1 of upper position and thickness less than the diameter of the oxygen-free copper 2 adding thin chromium powder being positioned at lower position and thickness, Fig. 5 is the top view of Fig. 2, as shown in Figure 5, copper chromium series contact 1 is provided with 6 narrow grooves 3 along different angles.
As shown in Figure 3, the diameter being positioned at the copper chromium series contact 1 of upper position is equal to the diameter of the oxygen-free copper 2 adding thin chromium powder being positioned at lower position, the thickness being positioned at the copper chromium series contact 1 of upper position is not more than the thickness of the oxygen-free copper 2 adding thin chromium powder being positioned at lower position, Fig. 6 is the top view of Fig. 3, it will be appreciated from fig. 6 that copper chromium series contact 1 is provided with 6 narrow grooves 3 along different angles.
Vacuum interrupter copper chromium series composite contact of the present invention, by the oxygen-free copper 2 of copper chromium series contact 1 and the thin chromium powder of interpolation being positioned at its underpart is carried out organic composite (uniting two into one), eliminate existing brazing mode, effectively prevent the inconsistent phenomenon in assembling process, easy to assembly, effectively reduce contact resistance, avoid arcing face weld seam simultaneously and exist, indirectly provide the dielectric level of arc-chutes, it is ensured that product quality.
The processing method of above-mentioned vacuum interrupter copper chromium series composite contact, specific process is as follows:
Step 1, adopt dedicated mixer first by copper powder and chromium powder Homogeneous phase mixing (wherein: in copper chromium mixed powder, chromium powder mass percent is 25～50%, copper powder mass percent accounts for 50～75%, the mass percent sum of above composition is 100%) load in special die, the oxygen-free copper powder of the thin chromium powder of interpolation 0～3% is reinstalled after smooth out surface, then make blank at the pressure being not more than 5.5MPa to sinter at 950 DEG C～1050 DEG C, after multiple pressure, make annealing treatment at 600 DEG C～680 DEG C, finally obtain copper chromium series composite contact blank;
Step 2, in the copper chromium series composite contact blank that step 1 obtains, after different machining, again through milling machine or engraving machine on contact arcing face along different angles process 2～6, width be the narrow groove of 2mm～2.5mm, finally, through deburring, cleaning, namely obtain vacuum interrupter copper chromium series composite contact.
The processing method of vacuum interrupter copper chromium series composite contact of the present invention, the synchronous processing of the oxygen-free copper adding thin chromium powder achieving the copper chromium series contact being positioned at upper position and be positioned at lower position, crudy is good, convenient for assembly, save material, reduce cost, additionally by the thin chromium powder adding 0～3% in oxygen-free copper powder, reduce the coefficient of expansion of copper chromium series composite contact of the present invention, it is prevented that deform in brazing process.
Embodiment 1
Step 1, adopt dedicated mixer first by copper powder and chromium powder Homogeneous phase mixing (wherein: in copper chromium mixed powder, chromium powder mass percent is 25%, copper powder mass percent accounts for 75%) load in special die, reinstall the oxygen-free copper powder of the thin chromium powder adding 3% after smooth out surface, then make blank at the pressure of 5.5MPa and sinter at 1000 DEG C, after multiple pressure, make annealing treatment at 650 DEG C, finally obtain copper chromium series composite contact blank;
Step 2, copper chromium series composite contact blank is obtained in step 1, after different machining, again through milling machine on contact arcing face along different angles process 6, width be the narrow groove of 2mm～2.5mm, finally, through deburring, cleaning, namely obtain vacuum interrupter copper chromium series composite contact.
Embodiment 2
Step 1, adopt dedicated mixer first by copper powder and chromium powder Homogeneous phase mixing (wherein: in copper chromium mixed powder, chromium powder mass percent is 50%, copper powder mass percent accounts for 50%) load in special die, reinstall the oxygen-free copper powder of the thin chromium powder adding 2% after smooth out surface, then make blank at the pressure of 5.0MPa and sinter at 950 DEG C, after multiple pressure, make annealing treatment at 680 DEG C, finally obtain copper chromium series composite contact blank;
Step 2, copper chromium series composite contact blank is obtained in step 1, after different machining, again through engraving machine on contact arcing face along different angles process 4, width be the narrow groove of 2mm～2.5mm, finally, through deburring, cleaning, namely obtain vacuum interrupter copper chromium series composite contact.
Embodiment 3
Step 1, adopt dedicated mixer first by copper powder and chromium powder Homogeneous phase mixing (wherein: in copper chromium mixed powder, chromium powder mass percent is 35%, copper powder mass percent accounts for 65%, the mass percent sum of above composition is 100%) load in special die, the oxygen-free copper powder of the thin chromium powder adding 0% is reinstalled after smooth out surface, then make blank at the pressure of 5.5MPa to sinter at 1050 DEG C, after multiple pressure, make annealing treatment at 600 DEG C, finally obtain copper chromium series composite contact blank;
Step 2, copper chromium series composite contact blank is obtained in step 1, after different machining, again through engraving machine on contact arcing face along different angles process 2, width be the narrow groove of 2mm～2.5mm, finally, through deburring, cleaning, namely obtain vacuum interrupter copper chromium series composite contact.
Claims (3)
1. the vacuum interrupter processing method of copper chromium series composite contact, it is characterized in that, wherein vacuum interrupter copper chromium series composite contact, including being positioned at copper chromium series contact (1) of upper position and being positioned at the oxygen-free copper (2) adding thin chromium powder of lower position, described copper chromium series contact (1) and the oxygen-free copper (2) adding thin chromium powder are integral type structure; Specific process is as follows:
Step 1, adopt dedicated mixer that copper powder and chromium powder are first uniformly mixed into copper chromium mixed-powder and enter in mould, described copper chromium mixed-powder includes the copper of chromium that mass percent is 25～50% and 50～75%, the mass percent sum of above composition is 100%, the oxygen-free copper powder adding thin chromium powder is reinstalled after smooth out surface, it is 0～3% that described thin chromium powder accounts for the mass percent in oxygen-free copper powder, then sinter at 950 DEG C～1050 DEG C after the pressure being not more than 5.5MPa makes blank, make annealing treatment at 600 DEG C～680 DEG C then through after multiple pressure, obtain copper chromium series composite contact blank,
Step 2, in the copper chromium series composite contact blank that step 1 obtains, after different machining, again through milling machine or engraving machine on contact arcing face along different angles process 2～6, width be the narrow groove of 2mm～2.5mm, finally, through deburring, cleaning, namely obtain vacuum interrupter copper chromium series composite contact.
2. the processing method of vacuum interrupter copper chromium series composite contact according to claim 1, it is characterised in that the diameter of described copper chromium series contact (1) is equal to or less than the diameter of the oxygen-free copper (2) adding thin chromium powder.
3. the processing method of vacuum interrupter copper chromium series composite contact according to claim 1, it is characterised in that the thickness of described copper chromium series contact (1) is equal to or less than the thickness of the oxygen-free copper (2) adding thin chromium powder.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH05217473A (en) * | 1991-11-06 | 1993-08-27 | Meidensha Corp | Manufacture of electrode material |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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