What is the general setting temperature for wave soldering of PCBA processing plug-ins?

Wave soldering used in PCBA processing plug-ins is a common soldering technology. It combines the electronic components packaged in the plug-in with the PCB through holes and then forms the electrical performance and mechanical connection of the circuit board through wave soldering. The temperature setting during the wave soldering process is crucial to the welding quality!

1. The temperature settings for wave soldering of PCBA processing plug-ins mainly involve the following aspects:

1. Preheating Temperature: Preheating temperature refers to the temperature at which the PCBA needs to be preheated before putting the PCBA into the wave soldering machine. The setting of the preheating temperature should be determined according to the material and thickness of the PCBA. It is generally recommended to be between 120℃-150℃ (actual measured temperature). The purpose of preheating is to remove moisture and volatile substances from the PCB surface and reduce bubbles and welding defects during welding.

2. Soldering Temperature: Soldering temperature refers to the temperature at which the solder wave peak is heated in the wave soldering machine. The setting of the soldering temperature should be determined based on the characteristics of the solder alloy, the material of the PCBA and the heat-resistant temperature of the components. Generally, the welding temperature is between 240℃-260℃ (actual measured temperature), and the commonly used welding temperature is 240℃. Too low a soldering temperature may result in poor welding, while an excessively high soldering temperature may damage components.

3. Cooling Temperature: Cooling temperature refers to the temperature at which the PCBA is taken out of the wave soldering machine for cooling after the welding is completed. The cooling temperature setting should be determined according to the PCB material and welding process requirements. It is generally recommended to cool the PCB to room temperature or slightly above room temperature. Cooling too quickly may cause PCB deformation or stress while cooling too slowly will extend the production cycle. The general cooling slope is -5℃/S.

2. In addition to the above three main temperature settings, there are some other factors that need to be considered:

1. Solder Wave Height: The height of the solder wave has an impact on temperature conduction and welding PCBA quality. Generally speaking, the height of the solder wave peak should be slightly higher than the height of the component pins to ensure the reliability of welding.

2. Heating Time: Heating time refers to the time that PCBA is exposed to the solder wave in the wave soldering machine. The heating time should be determined based on the welding process requirements and the characteristics of the PCBA. Excessive heating time may cause components to be overheated.

In short, the temperature setting in wave soldering needs to comprehensively consider factors such as PCBA materials, heat-resistant temperatures of components, and welding process requirements. Reasonable temperature settings can ensure welding quality and improve the reliability and stability of PCBA. In actual operation, it is recommended to adjust according to the specific welding process specifications and equipment parameters and conduct necessary temperature testing and verification to ensure that the welding quality meets the requirements.

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