Solder Wire
Solder wire is composed of tin alloy and additives. The alloy ingredients are divided into tin-lead and lead-free additives and are evenly poured to the middle part of the pewter.
Different types of solder wires have different additives. The additives are used to improve the auxiliary heat conduction of the solder wire during the welding process, remove oxidation, reduce the surface tension of the material to be welded, remove oil stains on the surface of the material to be welded, and increase the welding area. The characteristics of solder wire are tin alloy wires with a certain length and diameter. They can be used with soldering irons or lasers in the welding of electronic components.
Classification of solder wire:
Classified by metal alloy materials: it can be divided into tin-lead alloy solder wire, pure tin solder wire, tin-copper alloy solder wire, tin-silver-copper alloy solder wire, tin-bismuth alloy solder wire, tin-nickel alloy solder wire and special tin-containing alloys. material solder wire
Classified according to the chemical composition of solder wire additives: it can be divided into rosin core solder wire, no-clean solder wire, solid core solder wire, resin solder wire, single core solder wire, three core solder wire, water-soluble solder wire, Aluminum soldering wire, stainless steel soldering wire
Classified by melting temperature: it can be divided into low-temperature solder wire, room-temperature solder wire, and high-temperature solder wire.
Application of solder wire:
The solder wire used in manual electronic component welding is composed of tin alloy and additives. During electronic welding, the solder wire cooperates with the electric soldering iron. A high-quality electric soldering iron provides stable and continuous melting heat, and the solder wire is used as a filler. Metal is added to the surface and gaps of electronic components to fix the electronic components and becomes the main component of soldering. The composition of the solder wire is inseparable from the quality of the solder wire, which will affect the chemical, mechanical and physical properties of the solder wire.
Solder wire without additives cannot weld electronic components because it does not have wettability and expandability. The welding will produce spatter and poor solder joint formation. The performance of the additive developed over a long period of time affects the performance of the solder wire welding.
Solder wire production
The first step is to detect tin, lead, rosin, and antioxidants. The inspectors check that the materials meet the standards and then transfer them to production before production.
The second step is the melting of tin material. The main and auxiliary materials are adjusted according to a certain proportion and put into the furnace to melt. After melting, add antioxidants to cover the surface. Increase the temperature and stir slightly to completely fuse them.
The third step is to heat the tin billet during the fusion process with oil or electric heating. Some manufacturers use coal for heating. Oil and electric heating require corresponding special heating furnaces that can automatically stir and adjust the temperature and time. It has good automatic control and reduces the possibility of poor fusion caused by human factors. The melted tin material is poured into the mold and cast into a rod-shaped blank.
The fourth step is wire extrusion. In the entire solder wire manufacturing process, the extrusion of tin material is the most critical, because extrusion is a key link in the entire production process. If there are defects and hidden dangers during extrusion, the solder wire will be damaged. Defects, sometimes it is difficult to find problems. In order to ensure the production of high-quality products, strict control of extrusion is very important. Rod-shaped solder wire is extruded in the hydraulic press and extrusion die. During the extrusion process, discontinuous wires must be inserted according to production According to the requirements, round wire, flat wire, thick wire can be made, and molds with different thicknesses can be made.
The fifth step is winding. During operation, the number of turns can be counted under fully automatic control if the winding is even and smooth. Uneven winding, unevenness and other undesirable conditions may occur during winding. Pay attention to these problems during production.
The sixth step is to package, inspect and store the solder wire.
