source:Other information release time:2023-03-11 Hits: Popular:PCB Assembly company
The process process of selective welding includes: spraying welding, preheating, soaking and drag welding by the circuit board. In selective welding, the coating of the welded welds plays an important role in the coating process of the welded agent.
At the end of welding heating and welding, the welding agent should have sufficient activity to prevent the bridge from generating and prevent the circuit board from oxidizing. The welding spray was painted by the X/Y robotic hand -carrying circuit board above the welded nozzle, and the welded agent sprayed to the PCB circuit board welding position.
Welding circuit board skills 2:
The microwave peaks after the return welding process are selected. It is important to accurately spray the welds. The micro -hole jet type does not stain the area outside the welded joint.
The diameter of the micro -point spray welding point is greater than 2mm, so the location accuracy of the welding deployed on the circuit board is ± 0.5mm to ensure that the welds are always covered on the welded area.
Welding circuit board skills 3:
You can understand the characteristics of selective welding through comparison with the peak welding. The obvious difference between the two is that the lower part of the circuit board in the peak welding is completely immersed in liquid solder. In selective welding, some specific areas and welded waves touch.
Since the circuit board itself is a bad thermal conductivity, it does not heat up the welding joints of the neighboring component and the circuit board area during welding.
Before welding, the aids must also be applied in advance. Compared with wave welding, the welding agent is coated with the welding part of the lower part of the circuit board, not the entire PCB circuit board.
In addition, selective welding is suitable for welding of inserted components. Selective welding is a new method. To thoroughly understand the selective welding process and equipment is necessary for successful welding.
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