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Инженерная технология
Инженерная технология
What matters should be paid attention to during PCBA processing?
Caddy 0 Замечания

What matters should be paid attention to during PCBA processing?

A normal and complete PCBA production line is equipped with solder paste press, patch machine, reflow welding, wave soldering, AOI detector, ICT online tester and other equipment. So many equipment in the process of PCBA need to pay attention to what matters? Next, Shenzhen PCBA processing manufacturer - Shenzhen kingford for you to introduce.

I. Transportation

In order to prevent PCBA damage, the following packaging should be used during transportation: anti-static turnover box is generally used for holding containers; The isolation material is anti-static pearl-cotton. The spacing should be at least 10mm between PCB boards and between PCB boards and boxes. The placing height must be more than 50mm away from the top surface of the turnover box, to ensure that the turnover box stacked do not pressure the power supply, especially the power supply with wire.

Two, PCBA processing and washing requirements

Board surface should be clean and tidy, no tin beads, component pins, stains. In particular, the welding spot of the plug-in surface should not be seen any dirt left by welding. When washing the board, we must pay attention to protect the following devices: wire, connecting terminals, relays, switches, polyester capacitors and other corrosive devices, and the relay is strictly prohibited to use ultrasonic cleaning.

Three, about the edge

After all components are installed, do not exceed the PCB board edge.

Four, PCBA processing furnace

As the pin of the plug-in element is scour by tin flow, some plug-in elements will be inclined after furnace welding, resulting in the element body beyond the screen frame, so it requires the solder repair personnel after tin furnace to correct it properly.

1, horizontal floating high power resistance can be righted 1 times, righted Angle is not limited.

2. Horizontal flotation diode with pin diameter greater than 1.2mm (such as the diode of DO-201AD package) or other components can be righted for 1 time and the righted Angle is less than 45°.

3, vertical resistance, vertical diode, ceramic capacitor, vertical safety tube, varistor, thermistor, semiconductor (TO-220, TO-92, TO-247 package), the bottom of the component body floating higher than 1mm can be righted 1 times, righted Angle is less than 45°; If the floating height at the bottom of the component body is less than 1mm, it is necessary to melt the solder joint with a soldering iron and centralize it, or replace the new component.

4. In PCBA processing, electrolytic capacitor, manganese copper wire, inductance and transformer with skeleton or epoxy plate base are not allowed to be straightened in principle. They are required to be welded well once.

PCBA processing

PCBA board

Why choose Shenzhen kingford to do PCBA processing?

1. Strength guarantee

SMT workshop: We have imported SMT machines and several sets of optical inspection equipment, with a daily output of 4 million. Each process is equipped with QC personnel, who can keep an eye on product quality.

▪DIP production line: We have two wave-soldering machines, among which there are more than 10 old employees who have worked for more than three years. The skilled workers can weld all kinds of plug-in materials.

2. Quality assurance, cost-effective

▪ High-end equipment can stick precision shaped parts, BGA, QFN, 0201 materials. Can also template patch, loose material hand.

▪ Sample and size batch can be produced, proofing from 800 yuan, batch 0.008 yuan/point, no start-up fee.

3. Rich experience in SMT and welding of electronic products, stable delivery

▪ Accumulated SMT SMT processing services for thousands of electronic enterprises, involving many kinds of automotive equipment and industrial control motherboard. The products are often exported to Europe and the United States, and the quality can be affirmed by new and old customers.

▪ On time delivery, normal 3-5 days after complete materials, small batch can also be expedited on the same day shipment.

4. Strong maintenance ability and perfect after-sales service

▪ Experienced maintenance engineers can repair all kinds of patch welding caused by bad products, to ensure the connection rate of each piece of circuit board.

▪ 24-hour customer service staff at any time response, the fastest speed to solve your order problems.

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