CN103456414A - Surface anti-oxidation treatment technology for copper-clad aluminum duplex-metal composite wire rods - Google Patents
Surface anti-oxidation treatment technology for copper-clad aluminum duplex-metal composite wire rods Download PDFInfo
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- CN103456414A CN103456414A CN2013103915347A CN201310391534A CN103456414A CN 103456414 A CN103456414 A CN 103456414A CN 2013103915347 A CN2013103915347 A CN 2013103915347A CN 201310391534 A CN201310391534 A CN 201310391534A CN 103456414 A CN103456414 A CN 103456414A
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Abstract
The invention discloses a surface anti-oxidation treatment technology for copper-clad aluminum duplex-metal composite wire rods. The technology comprises five continuous processes which are the copper-clad aluminum wire rod preprocessing after annealing, anode oxidation, cleaning and drying, insulation sealing and forced drying. In the preprocessing process, a dilute nitric acid system is used for activating the surface of copper, and the copper surface is washed. In the anode oxidation process, strong alkaline oxidation media are used, the current parameter is 1-5A/dm2, and the processing temperature is 80-90 DEG C. An anode oxidation film is quickly cleaned and dried, then insulation sealing agents evenly coat the anode oxidation film, and then the anode oxidation film is quickly dried and solidified through hot wind. Low-voltage insulation copper-clad aluminum wires with a common surface morphology and mechanical property can be obtained through the technology, and the voltage withstand level is more than 80 V and smaller than 300V.
Description
Technical field
The present invention relates to a kind of copper cover aluminum bimetallic composite wire rod surface anti-oxidation and process, particularly introduce the copper surface anti-oxidation is processed, to adapt to the production of many wire rod synchronous high-speeds.
Background technology
The background technology the present invention relates to has two sources: the anodized of copper and copper alloy and copper conductor Production of Enamel Wires technique.The anodized of copper and copper alloy is generally used for improving its corrosion resistance or meets its surperficial special decoration requirement, in general, through the anodized of long period, copper and copper alloy surface such as can form from pitch black to light green at oxide or the complex compound compact film of color.And the conventional production process of copper enamelled wire is processed without special surface fully, can easily the voltage withstand class of wire be reached to thousands of volts.
The present invention forms low-voltage insulation layer main purpose after the copper cladding aluminum conductor surface is by the auxiliary low pressure insulating treatment process to be had: 1, arrive short circuit thermally-stabilised: the thermally-stabilised concept of short circuit is that, while being short-circuited, which kind of protective device all needs certain operate time.Therefore, before the accident excision, conductor is under the effect of Short circuit current heating effect, temperature can sharply rise to very high degree, conductor must be able to bear this thermal effect of short circuit current and not cause that insulating material is softening to be burnt out, also do not cause the mechanical strength of core wire material to reduce, this ability is the short circuit thermal stability of conductor.Maximum temperature when conductor dbus is crossed short circuit current is less than the heating allowable temperature in short-term of conductor regulation, thinks that conductor is heat-staple under short circuit condition, otherwise is heat-labile; 2, improve copper cover aluminum surface quality (corrosion-resistant, anti-oxidation etc.).
Summary of the invention
The present invention seeks to significantly do not changing copper-clad aluminum conductor surface (fine copper) color and texture, do not reduce under the prerequisite of wire production speed simultaneously as far as possible, provide a kind of online surface anti-oxidation to process.
Technical scheme of the present invention is achieved in the following ways: a kind of copper cover aluminum bimetallic composite wire rod surface anti-oxidation is processed, preliminary treatment, anodic oxidation, cleaning, drying, insulation and obturation and five operations of force drying by Coating Aluminum Weir Materials with Copper Layer after annealing form, and it is characterized in that:
1), the Coating Aluminum Weir Materials with Copper Layer of annealing in process under the prerequisite that do not roll off the production line, after five series-operations such as preliminary treatment, anodic oxidation, cleaning, drying, insulation and obturation and force drying are processed, receive to such an extent that there is the low-voltage insulation copper-clad aluminum conductor of conventional configuration of surface and mechanical property;
2), after five series-operations such as preliminary treatment, anodic oxidation, cleaning, drying, insulation and obturation and force drying are processed, the voltage withstand class of this copper-clad aluminum conductor is more than 80V, below 300V;
3), its pretreatment fluid adopts rare nitric acid system, and anodizing solution mainly consists of NaOH and potassium dichromate aqueous solution;
4), between pretreatment process and anodic oxidation operation, anodic oxidation and sealing add respectively the cleaning-drying link of a control rate between processing;
5), after sealing is processed, a specially designed rapid draing technique is arranged, this technique allows to use higher baking temperature.
Remarkable result of the present invention is:
(1) by the oxidizability of pre-treatment and activation and strengthening anodizing solution, realize the fast anode oxidation processes to the copper surface.
(2) force washing and heated-air drying also with making oxidized surface can adapt to rapidly follow-up sealing insulation processing.
(3) evenly smear with rapid draing technique and guarantee that the sealing insulation processing does not affect former take-up speed.
(4) meet the quality requirement of user to similar wire rod, technology stability is good.
(5) can add this technique not changing fully on original production line parameter basis.
The accompanying drawing explanation
Fig. 1 is process route of the present invention and main technologic parameters.
Embodiment
Press technological process shown in Fig. 1 and technological parameter, after pretreatment stage will enter anodizing tank through the copper-clad aluminum conductor acid pickling and rust removing of continuous annealing, and go out groove after spray cleans, Rapid Cleaning is also dried, then enter coating sealing link, drying enters normal take-up process after processing.
In the preliminary treatment link, the concentration of rare nitric acid will strictly be controlled according to the prime annealing schedule, goes out the front strictly cleaning of groove.
The preparation of anodizing solution is carried out at normal temperatures, notes order of addition of ingredients and chemical feeding quantity.After treating that solids dissolves fully, import after filtration anodizing tank, adjust the pH value in 13.4 left and right, start to heat anodizing solution, (now should carry out the preparation of its front and back operation) can start to produce after temperature stabilization.
The wire rod that leaves anodizing tank must be through scraping fluid, cleaning and dry three processes of accomplishing without any letup, and for guaranteeing its rear enclosed treatment effect, cleaning-drying must be very abundant.Can realize by increasing the means such as aqueous vapor pressure and temperature or prolongation winding-up distance.
Closing step is the important step that determines low-voltage insulation line quality, is also the most important factor that determines take-up speed.This link looks coating property and the site technique condition can be selected different coatings and drying means.Wherein with dip-coating with brush more for convenience, comparatively common with heated-air drying.
Embodiment 1; Φ 0.12mm copper-clad aluminum conductor, parallel 40, take-up speed 150m/min, after annealing and anodic oxidation auxiliary low pressure insulation processing, outward appearance and intensity and former wire rod approach, and the withstand voltage test result is 180V.
Embodiment 2: Φ 1.02mm copper-clad aluminum conductor, and parallel 40, take-up speed 120m/min, after annealing and anodic oxidation auxiliary low pressure insulation processing, outward appearance and intensity and former wire rod approach, and the withstand voltage test result is 200V.
The mechanical performance that table 1 is Coating Aluminum Weir Materials with Copper Layer before and after anodic oxidation auxiliary low pressure insulation processing and insulation property contrast.
| Performance | Hot strength (MPa) | Conductivity or resistivity (Ω. mm 2/m) | Puncture voltage (V) |
| The low-voltage insulation line | 258 | 0.02676 | 100 |
| The former line of copper cover aluminum | 246 | 0.02676 | 0 |
Claims (6)
1. a copper cover aluminum bimetallic composite wire rod surface anti-oxidation is processed, and five series-operations such as preliminary treatment, anodic oxidation, cleaning, drying, insulation and obturation and force drying by Coating Aluminum Weir Materials with Copper Layer after annealing form.
2. a kind of copper cover aluminum bimetallic composite wire rod surface anti-oxidation according to claim 1 is processed, it is characterized in that: the Coating Aluminum Weir Materials with Copper Layer of annealing in process is under the prerequisite that do not roll off the production line, after five series-operations such as preliminary treatment, anodic oxidation, cleaning, drying, insulation and obturation and force drying are processed, receive to such an extent that there is the low-voltage insulation copper-clad aluminum conductor of conventional configuration of surface and mechanical property.
3. a kind of copper cover aluminum bimetallic composite wire rod surface anti-oxidation according to claim 1 and 2 is processed, it is characterized in that: after five series-operations such as preliminary treatment, anodic oxidation, cleaning, drying, insulation and obturation and force drying are processed, the voltage withstand class of this copper-clad aluminum conductor is more than 80V, below 300V.
4. a kind of copper cover aluminum bimetallic composite wire rod surface anti-oxidation according to claim 1 is processed, and it is characterized in that: its pretreatment fluid adopts rare nitric acid system, and anodizing solution mainly consists of NaOH and potassium dichromate aqueous solution.
5. process according to claim 1 and 4 described a kind of copper cover aluminum bimetallic composite wire rod surface anti-oxidations, it is characterized in that: between pretreatment process and anodic oxidation operation, anodic oxidation and sealing add respectively the cleaning-drying link of a control rate between processing.
6. a kind of copper cover aluminum bimetallic composite wire rod surface anti-oxidation according to claim 1 is processed, and it is characterized in that: after sealing is processed, a specially designed rapid draing technique is arranged, this technique allows to use higher baking temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2013103915347A CN103456414A (en) | 2013-09-02 | 2013-09-02 | Surface anti-oxidation treatment technology for copper-clad aluminum duplex-metal composite wire rods |
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| CN2013103915347A CN103456414A (en) | 2013-09-02 | 2013-09-02 | Surface anti-oxidation treatment technology for copper-clad aluminum duplex-metal composite wire rods |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04121914A (en) * | 1990-09-11 | 1992-04-22 | Nippon Light Metal Co Ltd | Insulated aluminum wire rod and its manufacture |
| CN101110287A (en) * | 2007-09-05 | 2008-01-23 | 西北有色金属研究院 | Preparing technique of NbTiTa/Cu superconducting wire |
| CN102254637A (en) * | 2011-04-19 | 2011-11-23 | 常州明豪新金属材料有限公司 | Process for anodic oxidation auxiliary low-voltage insulation treatment of copper clad aluminium wire |
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2013
- 2013-09-02 CN CN2013103915347A patent/CN103456414A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04121914A (en) * | 1990-09-11 | 1992-04-22 | Nippon Light Metal Co Ltd | Insulated aluminum wire rod and its manufacture |
| CN101110287A (en) * | 2007-09-05 | 2008-01-23 | 西北有色金属研究院 | Preparing technique of NbTiTa/Cu superconducting wire |
| CN102254637A (en) * | 2011-04-19 | 2011-11-23 | 常州明豪新金属材料有限公司 | Process for anodic oxidation auxiliary low-voltage insulation treatment of copper clad aluminium wire |
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Application publication date: 20131218 |