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Reflow soldering is an indispensable manufacturing stage in PCBASMT patch processing, and reflow soldering will continue to endanger the soldering quality of SMT patch processing. Nowadays, most of the SMT production processes and soldering in PCB processing factories are all applied reflow soldering processes.
So what exactly is reflow soldering? The following technical professional PCBA chip processing manufacturer Excel Circuit will give everyone a simple introduction.
What exactly is reflow soldering?
Simply put, reflow soldering actually means that there is a heating power supply circuit in the soldering furnace. The gas or N2 is heated to a sufficiently high temperature and then blown to the PCB circuit board with the components already attached, so that the solder on both sides of the components After melting, it is bonded to the computer motherboard.
This kind of production and processing method can accelerate the whole process of SMD soldering to the extent that manual soldering cannot be achieved, mass production can be completed casually, and the cost of PCBA production and processing can be reasonably manipulated.
In reflow soldering, the solder layer of the PCBA-based steel plate is first covered by solder paste, which is generally a compound of solder, small balls, and flux beads.
The solder paste is automatically packaged and printed according to the position of the screen, which in turn encourages the solder paste to be left only in the area where the terminals of the device must be soldered.
After the component placement of the SMT patch is carried out on the PCBA base steel plate, the quality inspection outside the furnace will be carried out. The wood board whose quality has been determined to pass will be placed on the chair rail and transported to the reflow oven, which will rise to a high level in the reflow soldering machinery and equipment. The temperature past the melting point of the solder. The solder then flows back to the terminals of the device, and then the circuit board is cooled.
The greater element that harms reflow soldering is uneven heating, and the reason for uneven heating is mainly the thermal conductivity of reflow components or the difference between digestion and absorption of heat, the edge of a conveyor belt, or electric heater, and reflow soldering. Three levels of commodity load. If you want good actual welding results, continuous practice is necessary.
