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[Chemical Knowledge]：In-depth understanding of the reflux ratio, improve the efficiency of your production process!

Read： 799 Time：18months ago Source：Transform the World with Simplicity

In the modern electronic manufacturing industry, SMT (surface mount technology) is one of the indispensable manufacturing processes. The reflow soldering process is a key step in SMT, which gives electrical contact and reliable opportunities for countless electronic devices. The reflux ratio is one of the important factors affecting the quality of reflow soldering. So, what is the reflux ratio? Let's explore it together. The

reflux ratio refers to the heat transfer efficiency in the reflow oven. Simply put, it is the ratio of the heat used to heat the components in the soldering oven to the heat absorption capacity of the components in the circuit board. Under normal circumstances, the faster the heat in the soldering furnace is transferred to the components in the circuit board, the faster the reflow soldering speed. However, too fast or too slow a reflow ratio will have a negative impact on the soldering quality. Too fast a reflux ratio, for example, may lead to excessive melting of the solder joint or even ablation of the electronic component. Therefore, the correct setting of the reflux ratio is very important to the guarantee of welding quality and product life. The calculation formula of

reflux ratio is: reflux ratio = total power of oven heat transfer/maximum load area of circuit board interface. The heat transfer power of the baking oven depends on the power and design of the equipment itself, while the maximum load area of the circuit board interface is related to the size and density of the circuit board that the soldering oven can accommodate. According to the calculation results of the reflux ratio, we can take appropriate measures to adjust the parameters, such as increasing or decreasing the heat transfer power, adjusting the transmission speed of the welding furnace and changing the number of circuit boards. Of course, the dynamic adjustment of the reflux ratio is a complex technical activity, only experienced technical personnel to be able to master.

In addition to adjusting the reflux ratio, we can also optimize the following aspects to improve production efficiency:

1. Check the equipment: The welding furnace equipment often needs to be checked for damage, such as whether the thermocouple line is broken, whether the fan is normal Work, etc., once there is a problem, timely maintenance can ensure welding quality and production efficiency.

2. Optimize the process: In the production process, welding is one of the key steps. By optimizing the process can reduce the dependence on welding and put an end to some artificial defects, thereby improving product quality and production efficiency.

In short, the reflux ratio is a very important parameter in SMT manufacturing, which directly affects the welding quality and production efficiency. According to different product requirements and welding process, appropriate adjustment of reflux ratio, optimization of process flow, inspection of equipment maintenance and other measures can greatly improve product quality and production efficiency.

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