Automatic soldering machine in the use of common problems and solutions

When the automatic soldering machine is used, there are sometimes some undesirable problems, which are mainly manifested as low solder joint accuracy, virtual soldering, continuous soldering, tin stacking, drawing tips, missing soldering, etc. In view of these poor welding problems, in addition to the debugging itself, there are some external factors, so how to solve these problems? Let's take a closer look:

1.Missing soldering problem in the soldering process of automatic soldering machine: Missing soldering usually refers to the phenomenon of tin-free on the pad when soldering in the automatic soldering machine. The reasons for this phenomenon are: first, the soldering iron tip does not touch the solder joint, at this time we need to adjust the coordinates of the point so that the soldering iron tip contacts the solder joint, so that there will be no soldering; Another reason is that the surface of the pad is heavily oxidized, and the tin cannot adhere at all.

2.Virtual soldering problem in the soldering process of automatic soldering machine: virtual soldering generally refers to the fact that in the soldering process, the solder joints seem to be normal, but in fact the soldering is not firm or the amount of tin penetration is insufficient. This is mainly caused by the soldering tip staying on the pad for too short a time or the temperature is too low. Therefore, it is only necessary to extend the residence time of the soldering iron tip or increase the temperature.

3.Continuous soldering problems in the soldering process of automatic soldering machine: Continuous soldering usually refers to the phenomenon that two adjacent solder joints are bridged together during the soldering process. The reason for this phenomenon is either too much tin or too little gap between two points. In this case, you should first reduce the amount of tin, and then check whether the position of the soldering iron tip is correct, if not, you should adjust it in time.

4.Tin stacking problem in the soldering process of automatic soldering machine: Tin stacking generally refers to the solder spot being welded into a spherical shape, and the pin is not exposed. The main reason for this phenomenon is that the amount of tin fed is too large, which can be solved by reducing the amount of tin fed, and another reason is that the pin is too short and the pad is not exposed.

5.Other problems in the welding process of the automatic soldering machine: the accuracy of the solder joints is not high, and the surface is sharpened. The low accuracy of the solder joint means that the solder joint is not smooth; Drawing refers to the phenomenon that the solder joint is not well formed or has burrs and tin tips after soldering. This condition is mainly caused by the poor fluidity of the tin, and sometimes it is also related to improper parameter settings, such as too long residence time or too high soldering temperature, which causes the flux to volatilize instantaneously, thereby reducing the fluidity of the solder, and the phenomenon of pulling the tip will be formed when the soldering iron tip is raised. In addition, if this problem cannot be solved by parameter setting, the problem of tin wire should be considered.

Revealing the reason why the soldering iron tip of the automatic soldering machine does not stick to the tin As we all know, the automatic soldering machine mainly relies on the soldering iron tip to heat up and melt the tin wire and solder the tin to the product. Therefore, the soldering iron tip plays a vital role in the soldering machine, and the soldering iron tip of the automatic soldering machine does not stick to the tin, which often bothers customers. Combined with many years of experience in the automatic soldering process, the reason why the soldering iron tip does not stick to the soldering iron in the automatic soldering machine is not only the problem of the soldering iron tip itself, but also several other reasons, which are analyzed as follows:

1.Before use, the soldering iron tip is dipped in tin and not eaten tin.

2.If the temperature is too high during soldering, it is easy to cause violent oxidation on the tinned surface of the soldering iron tip.

3.The solder wire used is not of good composition or the flux in the middle of the wire is interrupted.

4.The cleanup method used is incorrect or defective.

5.When the working temperature exceeds 350°C and the soldering is stopped for more than 1 hour, the amount of tin on the lead-free soldering iron tip is too small.

6.The flux used is highly corrosive, which causes the tip to oxidize rapidly.

7."Dry-burning" soldering tips, e.g. when the soldering station is open but not in use, and there is no tin on the surface of the tip, can cause rapid oxidation of the lead-free tip.

8.Exposure to organic matter, such as plastics, lubricants, or other compounds.

9.Use a neutrally active flux, but not regularly clean the oxide from the soldering iron tip.

Five key points analysis of the use and maintenance of the soldering tip of the automatic soldering machine The soldering tip is an important part of the automatic soldering machine, and it is also a key component that affects the quality of the solder, and it is also a wearing part, which can be said to be the most vulnerable part of the entire automatic soldering machine and belongs to consumables. Therefore, although the soldering iron tip is small, if it is not properly maintained, it will bring a lot of trouble. In order not to affect the production efficiency of the production line, please keep in mind that the daily maintenance of the soldering iron tip is very important and will not take up too much time. It is recommended that the temperature should not be too high (around 260°) during initial heating and that the tip of the soldering iron be covered with tin to remove the oxide encapsulated on it. When it is possible, try to use a lower temperature, which can be soldered sufficiently and can protect temperature-sensitive components. Generally, it is recommended to use the temperature of 350 - 380 degrees, 350 - 360 degrees for small solder joints below 1.5mm, and 370 - 380 degrees for large solder joints above 2.5mm.

Second, when the soldering iron tip is used for the first time, be sure to adjust the temperature of the soldering iron tip to 220 degrees, let the tin part of the soldering iron tip fully eat tin, it is best to soak it in the tin for 5 minutes, then wipe it clean on the cleaning sponge, then adjust the temperature of the soldering iron to 300 degrees, repeat the above procedures, and finally adjust the temperature of the soldering iron to the required temperature before use. The purpose is to form a comprehensive protective film on the tin layer of the soldering tip to prevent it from oxidizing at high temperatures, resulting in heat transfer failure.

Third, if the tinned part of the tip contains black oxide, you can apply a new tin layer and wipe the tip with a moist cleaning sponge. Repeat this until the oxide is completely removed, then apply a new tin layer and clean the tip regularly.

Fourth, if not in use, the power should be turned off, the soldering iron tip should be wiped clean on the cleaning sponge, and then a new layer of tin should be added, and before using it again, the soldering iron tip should also be wiped clean on the cleaning sponge, and then a new layer of tin should be added.

Fifth, when any of the following situations occur, the soldering iron tip should be replaced: 1) when the soldering iron tip is oxidized and the oxide cannot be removed by the above methods; 2) The edge of the soldering iron tip is incomplete and defective; 3) There are holes and perforations in the soldering iron tip.

Daily maintenance and maintenance methods of automatic soldering machine When using automatic soldering machine, we should first read the manual of automatic soldering machine carefully, fully understand it, and do a good job of daily maintenance and maintenance to ensure the normal operation of the machine and improve the utilization efficiency of the machine. The following are some daily maintenance and maintenance methods of automatic soldering machine, I hope it will be helpful to you!

First, it is necessary to check before booting, starting with the power supply, and then checking whether the soldering iron tip is intact and whether the tin wire is used up.

1.First, check whether the tin wire is used up and whether the soldering iron tip is damaged;

2.Plug it in;

3.Turn on the power and get to work.

Second, the tin wire should be placed in a dry and cool place to avoid humidity or too high temperature, and there will be a small frying of tin when the solder and the soldering iron tip are touched.

Third, when the tin wire is used up, it is recommended that you cut the tin wire at the front end of the tin feeder and pull it out from the front section of the tin feeding tube (close to the soldering iron tip) to avoid blocking the tin feeding tube or the tin wire being broken in the tin feeding tube, so as to reduce the time for replacing the tin wire.

Fourth, it is strictly forbidden to turn off the power suddenly when the machine is turned on, which is easy to damage the machine and greatly reduce the service life of the machine.

Fifth, after each day's work, it is recommended that you use alcohol to clean the flux of the soldering iron tip and the front section of the tin feeding tube (close to the soldering iron tip) so that the next day's work can be carried out smoothly.

Sixth, customers who use anti-tin explosion tin feeders should generally check whether the teeth on the tin breaking blade are damaged in about three months, so as not to affect the use effect of anti-tin explosion.

Seventh, when replacing the tin wire, please make sure that the tin wire is placed in the correct position of the tin feeding gear, and at the same time, the tin feeding tube should be locked to avoid loosening during the tin feeding process, which will increase the tin feeding failure and waste your precious time.

Eighth, when replacing the soldering iron tip, please turn off the power of the whole machine, turn off the power of the temperature controller, and make sure that the temperature of the soldering iron tip has dropped to a touchable range before replacing it, so as not to damage the soldering iron tip or burn it.

Ninth, it is strictly forbidden to touch the soldering iron tip and the lower tin wire with your hands during the soldering process to avoid burns. During the operation of the machine, it is strictly forbidden for any part of the body to reach into the running area of the machine to avoid unnecessary accidents (to enhance the awareness of self-prevention, it is forbidden to doze off).

Tenth, the soldering iron tip generally needs to be replaced in the following three situations: one is that the soldering iron tip has no temperature, the second is that the soldering iron tip is perforated, and the third is that the defective products have increased significantly.

Eleventh, if you find that the product is misplaced or not put in place or there is an emergency during the operation of the machine, please press the red emergency stop button on the machine to avoid damage to the product and your own safety.

Twelfth, if the heating core of the welding pen is damaged during use, please directly find the manufacturer to buy or replace. It is strictly forbidden to open it without permission to avoid unnecessary trouble. It is generally recommended that you make a backup during use, and replace it in time when it is damaged, so as not to affect the production progress, and purchase a heating core as a spare bishop.

Thirteenth, when placing the product for welding, it is strictly forbidden for the product or tooling fixture to hit the soldering iron head, so as to avoid the position of the soldering iron head offset and increase the unnecessary adjustment time.

Fourteenth, because the tin wire itself contains flux during the use of the machine, the smoke generated is larger, it is recommended that the factory install a smoke exhaust device to provide a clean working environment for the use of personnel, it is best to arrange 4-5 machines to be controlled by one person to avoid accidents.

Fifteenth, if the rest period of the machine is more than 10 minutes, it is recommended that you turn off the temperature controller to avoid oxidation of the soldering iron tip in the high temperature process and prolong the service life of the soldering iron tip.

Sixteenth, please follow the relevant training or operation instructions of the manufacturer's engineers when programming.

Seventeenth, in the process of cleaning the soldering iron tip, it is strictly forbidden to rub the soldering iron tip with a file, so as not to damage the plating on the soldering iron tip and shorten the service life of the soldering iron tip. It is recommended that you use a special soldering iron tip cleaning sponge (do not carry too much moisture) or a small blade for cleaning.

Eighteenth, when the tin wire is replaced or the tin wire is blocked and the tin wire needs to be re-threaded, the tin wire protruding from the front section of the tin feeding tube (close to the soldering iron tip) is generally cut short with scissors or scissors, so as to avoid the formation of a small ball and cause the tin feeding tube to be blocked, and the tin wire cannot be withdrawn from the tin feeding tube.

Nineteenth, the hose in the front section of the tin tube (close to the position of the soldering iron tip) is generally about 3 to 5 mm away from the front of the soldering iron tip when adjusting the machine, not too far forward (easy to be burned by the soldering iron tip) or too far back (easy to offset the tin wire), so as not to cause tin wire blockage or tin offset.

Twentieth, at the end of each day, please turn off the power of the machine and the temperature controller to save electricity (it is best to unplug and avoid lightning).

Automatic soldering machines are increasingly widely used in industrial production, and although there are many of the above problems, as long as we correctly understand and actively deal with them, we can give full play to their advantages. For example, in the soldering of automotive electronic components, the use of automatic soldering machines is very common. If there is a problem with low solder joint accuracy, as we analyzed earlier, it may be that the tin has poor fluidity or improper parameter settings. At this time, the technician needs to make adjustments according to the specific situation, such as checking the quality of the tin wire, checking whether the composition of the tin wire affects the flowability, or re-examining whether the parameter settings are reasonable.

In the mass production of electronic products, the efficiency of automatic soldering machines is crucial. Once there is a continuous soldering problem, according to the previously mentioned method, after reducing the amount of tin fed and adjusting the position of the soldering iron tip, it is necessary to conduct random inspections on the subsequent soldering products to ensure that the problem is completely solved. Because in mass production, a small welding problem can lead to quality problems in a large number of products.

From the perspective of the overall use of the automatic soldering machine, the professionalism of the operator and the degree of operation specification have a direct impact on the operation effect of the machine. For example, in daily maintenance, whether the operator strictly follows the requirements for the maintenance of the soldering iron tip, whether the solder wire is correctly placed, etc., these seemingly trivial details are actually related to the service life and soldering quality of the automatic soldering machine. Only by continuously strengthening the training of operators and improving their understanding of the principle, operation and maintenance of automatic soldering machines can we fundamentally reduce the occurrence of various soldering problems and improve production efficiency and product quality.