When we use electric soldering irons to weld electronic components, do we feel inadequate due to the unsatisfactory function or design of the soldering iron? Have you ever blindly worshipped 'certain light 936' while listening to the teachings of various great gods?
（1） Selection of electric soldering iron types
1. Intern verwarmd elektrisch solderen ijzer. Het interne verwarmen elektrisch solderen strijkijzer heeft een eenvoudige structuur % 2c hoog thermisch efficiëntie % 2c en is lichtgewicht en flexibel % 2c maken het het de voorkeur keuze. Het bestaat uit a verbinding stang stang % 2c handvat 2c solderen ijzer kop (ook bekend als koper kop). Het solderen ijzer kern is geïnstalleerd binnen het solderen ijzer kop. De soldeer ijzer kern is gemaakt van nikkel chroom weerstand draad gewikkeld rond a porselein buis. Over het algemeen, de weerstand van a 20W elektrisch solderen ijzer is ongeveer 2,4k Ω, terwijl dat van a 35W elektrisch solderen ijzer is ongeveer 1,4k Ω.
Intern verwarmd elektrisch solderen strijkijzer
2. Externally heated electric soldering iron. This type of electric soldering iron has a complex manufacturing process, low efficiency, and high price, generally consisting of soldering iron head, soldering iron core, shell, handle, plug, and other parts. The soldering iron head is installed inside the soldering iron core and is made of copper alloy material based on copper with good thermal conductivity.
3. Thermostatic electric soldering iron. Install a magnetic temperature controller inside the soldering iron head to control the power on time, which is a constant temperature electric soldering iron. When welding components that should not be too high in temperature or too long in welding time, a constant temperature electric soldering iron should be used, but its price is high. Although the automatic constant temperature electric soldering iron has many parts, is difficult to repair, and has a high price, it can ensure the quality of the solder joints, especially when conducting circuit experiments and repairing a large number of printed boards, it works very well. The electric soldering iron used on the production line adopts an automatic voltage regulation method for constant temperature, which may result in lower costs. In some areas, the power supply is unstable, and the soldering iron is often burned without dipping in tin, or the temperature is not enough to solder. To ensure the quality of brazing, the only option is to use an automatic constant temperature series soldering iron or configure a voltage regulating system. Even if the temperature is too high, a series step-down resistor can also be used.
4. Tin absorberend elektrisch solderen ijzer. Tin zuiging elektrisch solderen ijzer is a solderen gereedschap dat integreert a zuiger type tin zuigkracht apparaat met an elektrisch solderen ijzer. Het heeft de kenmerken van handig gebruik, flexibiliteit, en breed toepasbaarheid. De nadeel is dat slechts één soldeer verbinding kan be verwijderd op bij a tijdstip.
5. Gas welding soldering iron. It is a type of soldering iron that uses combustible gases such as liquefied gas and methane to burn and heat the soldering head. In situations where power supply is inconvenient or AC power cannot be supplied, you can choose to use it. Due to the risk of explosion, this article does not discuss the selection of such soldering irons here.
（2） Power selection of electric soldering iron
The power of the soldering iron used is too high, which can easily burn out the components (usually when the temperature of the junction of the transistor and transistor exceeds 200 degree , it will burn out) and cause the printed wires to detach from the substrate; The power of the soldering iron used is too low, the soldering tin cannot be fully melted, the flux cannot evaporate, the solder joints are not smooth and firm, and it is prone to false soldering. Generally, it is used for welding integrated circuits, printed circuit boards, CMOS circuits, decorating transistors, IC type recorders, televisions, and conducting ordinary circuit experiments. It is generally recommended to use 20W. For repairing vacuum tube machines such as biliary machines and old instruments, it is recommended to use 35W, while for externally heated ones, it is recommended to use 45W. For welding the wiring of large transformers and grounding main lines on metal substrates, it is recommended to use internally heated 50W, externally heated 75W, and some higher power applications.
Er zijn verschillende vormen van solderen ijzer koppen% 2c en de sleutel tot kiezen een is om regelmatig onderhoud een bepaalde hoeveelheid soldeer % 2c en effectief smelt het soldeer op de verbinding % 2c zonder produceren soldeer verbindingen % 2c of opknoping % 2c zonder bramen % 2c en zonder schade het bord en componenten. Als het soldeer verbindingen op de machine zijn merk nieuw en helder, het tin dippen sectie van de solderen ijzer kop kan be groter, en a plat of elliptisch kop kan be gebruikt voor snel warmte overdracht, natuurlijk werking, and convenience. The tin oxide layer is dik, and the solderen ijzer tip is relatief scherp, maken het makkelijk om doorbreken door.
Due to the high density of components, it is necessary to use corresponding sharp iron alloy heads to avoid burns and soldering. When assembling and disassemblembling IC blocks, special shaped soldering iron heads are often used. Sometimes, due to the inability to solder and the need to avoid schade plastic parts, bent solderen iron heads are used. Of course, it also depends on each person's operating habits and hobby's.
How to choose an electric solderen strijkijzer
1. Selectie van verwarming methode gebaseerd op elektrisch solderen strijkijzer
(1) Selectie van inwendig en extern verwarming: Wanneer het vermogen is het hetzelfde, de temperatuur van het intern verwarming elektrisch solderen ijzer is hoger dan dat van het extern verwarming elektrisch solderen strijkijzer.
(2) Wanneer lage-temperatuur lassen is vereist, a spanning regelaar moet worden gebruikt om controle de temperatuur van de elektrisch solderen ijzer. De temperatuur van de elektrisch solderen ijzer is nauw verwant aan de voeding voeding spanning. In praktisch gebruik, de temperatuur van de elektrisch solderen ijzer is vaak verminderd door verlagen de vermogen voeding spanning.
(3) Control the temperature by adjusting the extension length of the soldering iron head.
(4) There are several methods to stabilize the temperature of electric soldering irons: installing a regulated power supply to prevent changes in the power supply network; Maintain a certain volume, length, and shape of the soldering iron head; Using a constant temperature electric soldering iron; Maintain a constant indoor temperature; Avoid natural wind or electric fans, etc.
