03/08/2020
this problem. It will definitely help novices. When using soldering equipment, we must choose good auxiliary materials and fluxes. This is a key point of successful solder joint. And controlling temperature and time is also an very important part.
1. Selection of tin wire solder for automatic soldering machine
The function of the tin wire of the automatic soldering machine is to firmly connect the soldered wires or other metal parts together. Automatic soldering machine tin wire is a kind of low melting point alloy with good conductivity. It is easy to become liquid after being heated by an electric soldering iron. It adheres to the metal object being welded and fills the surrounding gaps. It will return to solid after cooling, ensuring Long-term firmness and good conductivity of the contacts. Automatic soldering machine tin wire includes tin-lead automatic soldering machine tin wire, silver automatic soldering machine tin wire solder, copper automatic soldering machine tin wire solder, etc. Tin-lead automatic soldering machine tin wire solder is often used in general electrical work . Automatic soldering machine tin wire solder can be processed into strips, blocks or filaments, etc. Soldering wire, especially rosin core automatic solder wire filled with rosin powder (flux) in its core, is the first choice for automatic soldering machine tin wire solder due to its low melting point and convenient use.
2. Selection of flux for automatic soldering machine
The function of the flux is to improve the soldering performance and enhance the welding firmness. The flux can remove the oxide on the metal surface and prevent it from continuing to oxidize, and enhance the activity of the solder wire of the automatic soldering machine and the metal surface to increase the wetting ability and adhesion. There are strong acid flux, weak acid flux, neutral flux and other types of flux. Commonly used fluxes for electricians include rosin, rosin solution, solder paste soldering oil, etc. The scope of application can be reasonably selected according to different welding objects. Solder paste and solder oil are corrosive and should not be used for welding electronic components and circuit boards. After soldering, the residual solder paste and solder oil should be wiped clean at the soldering place.
Control of solder joint shape
The shape of the solder joints is related to the quality ofautomatic soldering, so the automatic soldering process must be done properly and the solder joints are qualified. To weld qualified solder joints, the focus is to master the following skills.
Control of solder joint shape
The shape of the solder joints is related to the quality of automatic welding, so the automatic welding process must be done properly and the solder joints are qualified. To weld qualified solder joints, the focus is to master the following skills.
1. The automatic soldering machine dips the tin properly
When soldering, the amount of tin dipped in the head of the electric soldering iron should be appropriate. It is necessary to meet the welding needs of one solder joint each time. It cannot be too little or too much. Too little dipping will not cover the solder joints at one time, which will affect the welding firmness. Too much dipping of tin will cause the solder joints to be thick and even short-circuit with the nearby circuit. It may also cause the solder to drip during the process of moving the soldering iron and cause short circuits in other parts.
2. Proper automatic soldering method
During soldering, each time a solder joint is soldered, the head of the soldering iron dipped in tin is circled around the component pins, as shown in the figure, so that the solder is in full contact with the component pins and copper foil lines. The head of the electric soldering iron stays at the solder joint for a while and then leaves, a smooth and firm solder joint can be soldered. If the head of the electric soldering iron stays at the solder joint for too short, the soldering is not firm, and the flux is not Fully volatilized, will form a virtual weld. If the head of the electric soldering iron stays in the solder joint for too long, it may cause the solder to flow out, and it may also scald the components or the circuit board, causing the copper foil lines on the circuit board to fall off.
3. Requirements of automatic soldering machine for solder joint shape
The qualified solder joints of the standard should be round, smooth and free of burrs. The solder joints with burrs are prone to discharge interference, especially when the voltage is high and the solder joint spacing is small. Honeycomb solder joints like tofu residue are virtual soldering. The amount of tin used for automatic welding of each solder joint should also be controlled appropriately, too little or too much can not guarantee the welding quality.
How can the automatic soldering machine produce good solder joints? Rosin should be used as the soldering flux when tin-plating the pins of components. If the printed circuit board has been coated with rosin solution, there is no need to use flux when soldering components. Have you learned the control of solder joint shape? For more details, please log on to the official website of Rui Chi or call the soldering machine manufacturer.