Soldering is a process of joining two or more metal parts together by melting a metal alloy, known as solder, which has a lower melting point than the metal being joined. When the molten solder cools and solidifies, it forms a strong bond between the two metal parts.
The most common types of solder used in electronics is tin-lead (Sn-Pb) and lead-free solder, which is typically made from a combination of tin, copper, and silver.
Other materials used in soldering include flux, which is a chemical compound that helps to remove oxidation and other impurities from the metal surfaces being joined, and a soldering iron or torch, which provides heat to melt the solder and fuse the metal parts together.
In addition to electronics and plumbing, soldering is also used in jewelry making, metalworking, and other manufacturing processes.
Now most of the electronics circuits are comming with Surface Mounted technalogy. To make this we need SMD rewark station to make soldaring.
Important Steps Involved in Soldering
(1) Mounting Component: Insert the leads of the LED into the holes of the circuit board. Then flip the board over and bend the leads outward at a 45′ angle. It help the component make a better connection with the copper pad and prevent it from falling out while soldering.
(2) Heating The Joint: Soldering iron have to be powered and at approximate 400’C, touch the tip of the iron to the copper pad and the resistor lead at the same time. we need to hold the soldering iron in place for 3-4 seconds in order to heat the pad and the lead.
(3) Applying Solder To Joint: Keep holding the soldering iron on the copper pad and the lead and touch your solder to the joint. Don’t touch the solder directly to the tip of the iron. We want the joint to be hot enough to melt the solder when it’s touched. If the joint is cold, it will form a bad connection.
(4) Snip The Leads: Detach the soldering iron and let the solder cool down naturally. Don’t blow on the solder as this will cause a bad joint. Once cool, you can cut the extra wire from leads.
A good solder joint is smooth, shiny and looks like a volcano or cone shape. We want just enough solder to cover the entire joint but not too much so it becomes a ball or spills to a nearby lead or joint.
