Anodized aluminum wire electromagnetic wire oxide film aluminum round and flat wire, and oxide film aluminum tape (foil) belt are inorganic insulation special electromagnetic materials. The insulating layer of this product is aluminum trioxide (AL2O3), and there is no thermal agi

anodized aluminum wire electromagnetic wire

oxide film aluminum circle, flat line , oxide film aluminum tape (foil) belt is an inorganic insulation special electromagnetic material. The insulating layer of this product is aluminum trioxide (AL2O3), and there is no thermal aging phenomenon and can be used as C-level insulation. The product has thin insulation layer, high temperature resistance and stable insulation performance. It is the best choice for manufacturing low-voltage windings such as high working temperature, poor environment, and difficult heat dissipation. This product has unique technical performance and low cost advantages. It has been widely used in the electromagnetic industry at home and abroad. The products are mainly used in low voltage and high current electromagnetic windings such as electromagnet , reactor , motors and motors.

Product name and model:

Product name and model:

Technical parameters

oxide film aluminum wire aluminum foil (belt) and production process and method of production

Technical field:

This invention relates to a method of producing oxide film aluminum wire aluminum foil (belt) and its production process using htm2.

aluminum wire aluminum foil (belt) is a common material for winding transformers. Moreover, with the development of the power industry, especially the aluminum wire aluminum foil (belt) materials used in various transformers used in power transmission and transformation engineering systems. welding machine , general transformers, iron remover , electromagnets, rectifier and other electrical equipment all need to use aluminum wire aluminum foil (belt) to wind the wire group, but during use, the surface of these materials itself is not insulated. When used, a layer of insulating material (such as insulating paint ) or a layer of insulating paper is required to wrap the following problems:

. As we all know, the temperature resistance and cost of insulating material are important issues in the production and use of electrical products, and directly affects the electrical performance, usage performance and production costs of electrical products. At present, most of the temperature resistance limits of widely used insulating materials are below 120℃. Insulating materials above 120℃ cannot be widely used due to high costs and can only be used on special electrical appliances;

. Due to the outsourcing of aluminum wire and aluminum foil (belt), the volume of transformer winding increases, which makes winding troublesome. Moreover, this transformer has poor working efficiency and high energy consumption, so it needs to be reformed urgently.
The object of the present invention is to provide an oxide film aluminum wire aluminum foil (belt) and its production process to replace the currently used transformer winding.

The object of the present invention is achieved through the following technical measures. The existing aluminum wire aluminum foil (belt) is used to form an AL2O3 oxide film on the surface, making it a new oxide film aluminum wire aluminum foil (belt) that can be widely used as windings such as transformers. The electrochemical method is mainly made of anodic oxidation of the electrolyte tank and the alternating current anodic.

This inventive product is easy to produce, has low cost, is temperature resistant, is easy to use, its process is simple, the product quality is good, it is easy to promote and apply, and has great economic value.

The following describes the invention in detail in combination with the product and process flow.

oxide film aluminum wire, aluminum foil or aluminum tape , its composition is aluminum wire, aluminum foil or aluminum tape, electrochemical method to form an oxide film on its own surface. The oxide film insulating and protecting the aluminum wire, aluminum foil or aluminum tape. This kind of aluminum wire, aluminum foil or aluminum tape with an oxide film formed on the outer surface is called oxide film aluminum wire, aluminum foil (belt). The production process of oxide film aluminum wire, aluminum foil and aluminum tape is:

. The bare aluminum wire and aluminum foil (belt) for material selection must meet the requirements of JB648-77, the surface is smooth and clean, without any defects such as scratches, pits, edge burrs, and skin;

. Softening treatment softens the selected aluminum wire and aluminum foil (belt), that is, annealing at a temperature of 300℃-360℃, and insulated for 8-10 hours;

. Purification treatment cleans the softened aluminum wire and aluminum foil (belt), that is, remove oil and dirt in the purification liquid for 1-3 minutes. The purification liquid formula is:

a) trisodium phosphate 50g/liter, that is, add 50g trisodium phosphate to each liter of purified water (used as edge prick);

b) 10 grams of per liter of sodium per liter, that is, 10 grams of sodium per liter of water (used as oil removal) is added to each liter of clean water, that is, water: trisodium phosphate: sodium per 1000:50:10 (weight ratio, in grams), the solution temperature is 65℃-70℃, aluminum wire and aluminum foil (belt) are rinsed after passing through their solution. The rinsing is carried out in a flush tank, and it is also possible to rinse with tap water. The aluminum outlet water flush tank is clamped and wiped clean with felt, and then neutralize in the neutralization liquid for 1-3 minutes. The neutralization liquid is an aqueous solution of nitric acid, that is, 40 grams of nitric acid (1000:-40) per liter of water, and perform it at room temperature. After neutralization, rinse with tap water in the rinsing tank and wipe it clean with felt;

4. The alternating current for anodizing is continuously anodized in an electrolytic solution made of sulfuric acid and oxalic acid plus water, so that it forms a layer of AL2O3 oxide film on the surface. The oxidation is carried out in the electrode oxidation tank. The oxidation tank is divided into two fronts and backs. The oxidation liquid in the front and rears is the front tank, water: sulfuric acid: oxalic acid 100:15-16:15, rear tank, water: sulfuric acid: oxalic acid = 100:17-18:5, that is, water is 100, and the proportion of sulfuric acid and oxalic acid each account (can be written as the front tank of sulfuric acid 15-16%, the back tank 17-18%, and the oxalic acid is both 5%). The solution temperature requires the front tank 30℃-35℃. The rear trough is 28℃-33℃; the current density is 15-17A/dm2 (square decimeters), the AC working voltage is 35V, and sometimes it can reach 38-42V (that is, the working voltage is between 35-42V). The above current voltage is realized by a transformer with low voltage and high current; in oxidation, the oxidation speed generally requires a vehicle speed of 1-1.5 meters/minute. In actual operation, the elapsed time can be different according to the current density, electrolyte temperature, and oxide film thickness. If the required voltage resistance is not high, the film layer is thin, and the vegetable is loose, the vehicle speed can be 1.7 meters/minute;

5. Rinse the aluminum wire and aluminum foil (belt) after oxidizing the acid tank into the sink for rinsing, and use a felt to clamp it when leaving the tank;

6. Wash the aluminum wire and aluminum foil (belt) after rinsing the water in hot water and then rinse it through a hot water tank (neutral water) of 90℃-95℃ to further remove the residual acid in the gaps of the oxide film for 1 minute;

7. Drying the aluminum wire and aluminum foil (belt) after rinsing the hot water in the electric furnace at 150℃-180℃ for 1-1.5 minutes;

8. After the lower plate is washed with hot water, remove the aluminum wire and aluminum foil (belt) reels and store them for later use. The tension during the reel should be appropriate, the winding speed should be stable, the wires are even and neat, and there should be no friction between the wires. After the product is closed, it should be approved and accepted, labeled, packaged and stored in the warehouse according to regulations, and remove unqualified products.

In the above process, it should be pointed out that

. Check whether the circuit, water circuit, gas circuit , acid circuit (including tank and acid pump) is normal, unobstructed, and adjustable freely. No dripping is allowed, otherwise it should be eliminated;

. The mechanical transmission from the release to the retracting part of the wire, all parts should be complete and complete, and have been lubricated. The machine starts and test drive for 5 minutes. The rotation of each component should be flexible and stable, and the adjustment is convenient, otherwise it should be eliminated.

. You must wear labor protection supplies before work;

4. When preparing sulfuric acid, you should add water first and then pour the acid. Only when the prepared solution is when the temperature drops below 50℃ can you use a sulfur pump.

5. Introduce the aluminum wire self-discharge tray to the receiving tray, press it into the alkali tank, open all flushing valves and flushing acid pipes, and adjust to the appropriate position.

6. When driving, first press the retractor switch, start the retractor vehicle, then press the speed control transformer switch, start the speed fixed vehicle, adjust the speed to make the speed meet the requirements, and then adjust the retractor vehicle voltage regulator to achieve moderate tension. The order is reversed when parking.

7. It is prohibited to pour copper and iron into the sulfuric acid tank to prevent contamination of the oxidation solution.

8. Each shift is equipped with one tester and the entire process is often inspected. Test the temperature and concentration every 30 minutes and fill in the card in time to adjust problems when they are found. Before getting off work, the signatures and successors will be handed over.

9. When discharging waste acid, neutralization must be carried out.

0. Maintenance and repair for each rotating component, lubrication is performed every shift, and various motors are oiled once a year; every week of production, check the electrodes and each electric column . When the pass current is reduced by 30% compared to the rated current , it should be repaired or replaced in time; steam boiler , oxidize various dissolved tanks and pressure roller , work continuously for maintenance every 2 months, and achieve no dirt, no scale, smooth discharge, and flexible rotation.

The oxide film aluminum wire and aluminum foil (belt) produced by the above-mentioned process directly produce a 0.007-0.01mm thick oxide film AL2O3. The melting point of the oxide film reaches 2500℃, with a pressure resistance of more than 180V, and an absolute safe temperature of more than 250℃. Its scratch resistance, tensile resistance, bending radius, adhesion strength and mechanical strength all meet or exceed the requirements of the enterprise.

The products and processes of the present invention are very suitable for winding materials for electrical windings, especially for electrical appliances with high heat generation or high working environment temperature. Electrical appliances produced with oxide film aluminum foil (belt) also have the advantages of power factor high, energy saving, labor saving, time saving, material saving. In short, the invention has simple technology, high temperature resistance, low cost, and electricity saving. It is currently the most economical new temperature-resistant electromagnetic material. Its promotion and application has immeasurable economic effects and social benefits, and has opened up a new way to save energy.

Claim

. An oxide film aluminum wire aluminum foil (belt), characterized in that an AL2O3 oxide film has an outer surface of the aluminum wire and aluminum foil (belt).

. The oxide film aluminum wire aluminum foil (belt) according to 1, characterized in that the thickness of the AL2O3 oxide film is generally 0.007-0.01 mm.

. The production process of oxide film aluminum wire and aluminum foil (belt) according to claim 1 or 2 is characterized in that it is made of bare aluminum wire aluminum foil (belt) and softening (annealing) under 300°C-360°C. After insulated for 8-10 hours, it is then purified and removed by 65°C-70°C for 1-3 minutes. After that, it is neutralized in an aqueous nitric acid solution with a concentration of 40 grams/liter for 1-3 minutes. After rinsing with water in the flushing tank and wiping, it is continuously anodized in the electrolyte tank with a low-voltage and high current alternating current, so that it can generate an AL2O3 oxide film on the surface. The oxidized aluminum wire and aluminum foil (belt) are rinsed and wiped by cold and hot water, and then put into an electric furnace at 150°C-180°C for 1-1.5 minutes, and the line is removed and the required oxide film aluminum wire and aluminum foil (belt) are formed.

4. The production process according to claim 3, characterized in that the purification solution for purification treatment is a solution of trisodium phosphate, a solution of proprietary sodium and water, and its formulation is 1000 grams (liters) of trisodium phosphate, 50 grams/liter, and 10 grams/liter of proprietary sodium.

5. The production process according to claim 3, characterized in that the electrolyte for anodizing is a solution in the tank before oxidation (in unit 100 water), 15-16% sulfuric acid, 5% oxalic acid, and a temperature of 30℃-35℃; the solution in the tank after oxidation (in unit 100 water), 17-18% sulfuric acid, 5% oxalic acid, and a temperature of 28-33℃.

6. The production process according to claim 3, characterized in that the anodized operation voltage is 35V-42V and the current density is 15-17A/dm2 (square decimeters).