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It supplies heat to melt solder so that it can flow into the joint between two workpieces. A soldering iron is composed of a heated metal tip (the bit ) and an insulated handle. Heating is often achieved electrically, by passing an electric current (supplied through an electrical cord or battery cables) through a resistive heating element .
Desoldering braid, also known as desoldering wick or solder wick, is finely braided 18 to 42 AWG copper wire coated with rosin flux, usually supplied on a roll. Solder wick, before use... and soaked with solder and residue. The end of a length of braid is placed over the soldered connections of a component being removed.
Resistance soldering is soldering in which the heat required to melt the solder is created by passing an electric current through the parts to be soldered. When electric current is conducted through any metal, heat is generated; when that current is confined to a smaller cross-sectional area, the heat produced in the entire circuit is ...
Soldering guns are used where more heat is needed than from the lower-power soldering irons. They can be used for heavy electrical connections, stained glass assembly, and light sheet-metal work. Typical soldering guns are rated at 100 to 240 watts power. A gun may include a two-stage trigger to give two heat settings.
A hot air gun or hot air station is used to heat devices and melt solder, and specialised tools are used to pick up and position often tiny components. A rework station is a place to do this work—the tools and supplies for this work, typically on a workbench .
The most common are the models with 50-80 W power. The higher is the power the more amount of heat you may transmit for the same time. It allows reducing the temperature on the heating element to the minimal possible value for melting the solder alloy. And vice versa – the lower is the power the higher temperature you need to melt the solder.
The tip of this apparatus is split into two sections that completes an electrical circuit when a low electrical resistance is placed across the tip; e.g. metallic contacts, or solder. [1] With a current flowing, the resistance of both the solder and the tip produces enough heat to increase the temperature beyond the melting point of solder.
The size and shape of the metal particles in the solder paste determines how well the paste will "print". A solder ball is spherical in shape; this helps in reducing surface oxidation and ensures good joint formation with the adjoining particles. Irregular particle sizes are not used, as they tend to clog the stencil, causing printing defects.