What is the reason why the tin does not flow when the automatic soldering machine solders?

Automatic soldering machine mainly depends on the temperature of the soldering iron head to melt the tin line and solder the tin to the product.Therefore, the soldering iron head plays a decisive role in the soldering machine.How can the solder technology make the solder joint bright? We can specifically talk about the method of making the solder joint bright from five details. We hope to help you solve the problem of solder joint bright, so as to get a better effect.So what is the reason why the tin does not flow when the automatic soldering machine solders?

1,Hold steady: solder must be held steady clip special solder solidification stage can not shake.Slossing during solidification is easy to produce false welding.The solder joint is like a bean curd, resting the wrist on a brace for stability.Sit or stand up straight.
2, On the right amount of solder: according to the size of the solder joint dipped in the amount of solder enough to cover the solder.Form a bright and smooth solder joint on the solder is not enough to be filled, but it must be removed after the first solder is melted together.Some people pile solder up like swallows in their nests when they weld.As a result, a lot of solder is not strong.
3, Master the temperature skills: the temperature is not enough solder wire mobility is not easy to solidify the temperature is too high is easy to drip.The solder joint will not hold the solder.
4, First scraping after welding: to weld the component lead with oil stains or rust is not easy to eat tin.Even if the solder is removed from the strong "paste" a little, the result is false soldering.Scrape clean before flux.Dip the pin in the rosin and rub the pin back and forth with the electric soldering iron head until the pin is coated with a thin solder layer.Now the solderability of most electronic components is very good, so manual welding does not need to drip tin processing (the premise must use solder wire with flux), for the element is not properly kept, resulting in the oxidation of the component pin or dirt, it is necessary to drip tin.
l To the appropriate temperature according to the size of the object with the corresponding power of the soldering iron.
l  To master the heating time.The soldering iron head is pressed with soldering tin.The object to be welded is heated.When the solder rod from the soldering iron head automatically flows to the soldered object.Indicate the heating time is up.At this point quickly remove the iron head.Leaving behind a shiny, round spot of solder.Remove the solder tip and the solder will not hold.It indicates that the heating time is short.The temperature is not enough. Or the solder joint is too dirty.Before the iron head is removed, the solder will flow downward for a long time and a high temperature.
5,Less use of solder paste: it is an acid aid after welding should be wiped solder paste or seriously corrode the line.Release the solder joint. So a small amount.Try not to use solder paste.Rosin is a better solder when using non-rosin solder bars.The soldering iron is dipped on the rosin and soldered quickly.Or with 95 percent alcohol and rosin with a flux welding point can be a drop.In addition, a solution can be brushed on a clean solder joint.And on the printed circuit board to make the board as bright as before.