Reflow soldering is a common method of soldering in PCB processing. Reflow soldering fixtures are auxiliary devices designed to protect certain components on the PCB or assist in positioning plugs. Let’s discuss some tips to consider when making reflow soldering fixtures, hoping to be helpful to everyone.
Firstly, it is important to note that the carrying edge of the fixture should be wider than or equal to the width of the belt on the track, generally greater than 5mm. The thickness of the carrying edge should be moderate, typically around 1.5mm to 2mm.
Secondly, the corners around the fixture should be slightly larger to prevent the phenomenon of the board getting stuck during the reflow soldering process. Typically, the radius of the rounded corners should be the same as the width of the carrying edge.
Thirdly, while ensuring that it does not affect the strength of the oven fixture, we should try to hollow out the middle part of the oven fixture as much as possible during production to ensure that the fixture can be fully heated during the reflow soldering process, avoiding the occurrence of cold soldering.
Fourthly, for fixtures used for printing and mounting, the height of the positioning pillars of the fixture should not exceed the height of the PCB surface after placing the PCB board, otherwise it may collide with the steel mesh inside the printer, thereby damaging the PCB board.
Fifthly, the depth of the PCB board placement position should not exceed the height of the PCB board during design, otherwise it will cause an increase in the thickness of the solder paste printed, leading to short circuits on the PCB board after reflow soldering.
Sixthly, for fixtures used for reflow soldering, attention should be paid to the quality of the raw materials. If the material quality is poor and cannot withstand long-term high temperatures, it may cause deformation of the oven fixture.
Finally, when installing fixture screws, it is preferable to use self-locking nuts to prevent the fixture from loosening during reflow soldering.
Reflow soldering is a common processing method in PCB processing, especially in today’s continuous pursuit of miniaturization of PCBs, the application of reflow soldering fixtures has become more common. Therefore, when making fixtures, we need to remember and master these tips proficiently. Reflow soldering fixture cleaning can be done using the Silman Tech intelligent fixture cleaning machine, for more details, please contact the website customer service.
