Precautions for dip soldering of enameled aluminum wire : 1. Since aluminum has a relatively low melting point, it is easy to melt into the tin pot. When welding smaller diameter aluminum enameled wires (below 0.4mm), the temperature should be controlled within 300°C and below the aluminum wire The melting speed is to avoid embrittlement of the aluminum wire. Do not use high temperature tin for soldering.

2. Aluminum enameled wire must be depainted. Two depainting methods can be used: mechanical (paint scraping, paint remover) and chemical (paint removal powder, paint removal water). It is recommended to use chemical paint removal to remove paint and chemical methods to remove paint. . After that, the solder joints should be fully rinsed; try not to use mechanical methods to remove the paint, it is easy to scratch the aluminum wire, produce burrs, and weaken the toughness.

3. Due to the instability of aluminum, the paint must be removed and welded immediately. Do not keep the stripped aluminum enameled wire in contact with air for a long time to avoid oxidation. Generally speaking, welding should be carried out within 5 hours after paint stripping. If there is no welding, it needs to be cut off and repainted.

4. At the same time, the paint stripping length can be determined according to the welding length, that is, how long the welding can take to strip the paint, so as to prevent the aluminum material from being exposed to the air and leaving hidden dangers. Solder joints.

5. In addition, during dip soldering, gently shake 2 to 3 times in the tin pot to avoid air bubbles.

6. For the connection between the aluminum enameled wire and the lead, the aluminum wire should be wound outside the copper lead in a small arc, which can reduce the occurrence of false welding and improve the welding strength.

At present, the more common aluminum enameled wire stripping methods are: 1. It can be scraped off with a blade; 2. The paint can also be rubbed off with a grinding wheel; 3. It can be peeled off with a centrifugal knife; 4. There is also a paint remover. .

Rectangular Enameled Aluminum Wire scraping paint with a blade is relatively traditional and has no technical content. We use special tools to cause minor damage to the surface of the aluminum enameled wire. Without high temperature, no oxide film will be formed on the aluminum surface, and the wire will not change. Brittle, but low efficiency, only suitable for paint stripping of large wires, not suitable for wires with a diameter less than 0.5mm.

The second is the centrifugal knife method, which uses three high-speed rotating knives to directly peel off the paint of the aluminum enameled wire, which is more efficient. But this kind of paint stripping method is similar to manual paint scraping, which is only suitable for the paint stripping of large lines.

There is also the aluminum enameled wire grinding wheel method. If the wire used is relatively thick, you can choose this method. If the thread is very thin, it is still not the preferred method.

The other is paint remover. This method has little damage to the aluminum of aluminum enameled wire, but is basically useless for high-temperature wires, so it is not suitable for high-temperature wires.
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