Attention Points When Manufacturing PCBA
1.Design of Veneer Conveying and Positioning Elements For Automated Production Lnes
For automated production line assembly, PCBA circuit board must have the ability to transmit edges and optical positioning symbols, which is a prerequisite for production.
2.PCBA Process Design
The component layout structure of the components on the front and back of the PCBA determines the process method and path during assembly.
3.Component Layout Design
The position, direction and spacing design of components on the assembly surface. The layout of the components depends on the welding method used, and each welding method has specific requirements for the placement, direction and spacing of the components.
4.Assembly Process Design
The design for soldering through rate, through the matching design of pads, solder mask and stencil, realizes the stable distribution of solder paste quantitative and fixed points; through the layout design, realizes the simultaneous melting and solidification of all solder joints of a single package; through installation The reasonable connection design of the holes, the realization of 75% tin penetration rate, etc., these design goals are ultimately to improve the welding yield.
Attention Points In PCBA Soldering
1.Warehouse personnel should wear anti-static gloves when distributing materials and testing IQC, use the meter to be grounded reliably, and lay anti-static rubber pads on the work surface in advance.
2.In the process of operation, use anti-static work surface, and use anti-static container to hold components and semi-finished products. Department welding equipment can be grounded, and the electric soldering iron must be of anti-static type, and all equipment must be tested before use.
3.When the PCBA is processed through the furnace, because the pins of the plug-in components are washed by the tin flow, some plug-in components will be tilted after the furnace is soldered, causing the component body to exceed the silk screen frame, so the repair welding personnel after the tin furnace are required to perform it. Correct appropriately.
4.When PCBA is soldering speakers and batteries, please pay attention to the solder joints not to be too much tin, and not to cause short-circuit or fall off of peripheral components.
5.PCBA substrates must be placed neatly, and bare boards cannot be stacked directly. To stack, use electrostatic bags.
Attention Points In Packing After Finished Assembled PCB
1.Use anti-static packaging bags for the whole machine without shell
Regularly inspect the anti-static tools, settings and materials to ensure that the working conditions meet the requirements.
2.Operate according to the following process when assembling the finished product
Warehouse → production line → production line upgrade software → assembly into a complete machine → QC test → write IMEI number → QA full inspection → restore factory settings → warehouse; software must be upgraded before assembly, and it is not possible to upgrade the software after assembly into a finished machine. Unable to upgrade due to improper soldering, short circuit, work process problems, etc., resulting in misjudgment of defective PCBA.
