Welding process of plug-in unit of PCB (Printed Circuit Board)

Abstract

The invention relates to the technical field of welding of a PCB (Printed Circuit Board), and provides a welding process of a plug-in unit of the PCB, which can effectively improve the production efficiency, improves the production quality, reduces the production loss and cost, and reduces the operation difficulty and human errors. The process comprises the following steps of: (1) trimming supporting legs of components: trimming the supporting legs of the components into union and formal specification; (2) inserting the components: respectively the components processed in step (1) into corresponding welding pads of the PCB on a tray of a wave soldering machine; (3) viewing and pressing the components: performing visual inspection to confirm that the components are correctly inserted, and then pressing the components on the PCB; (4) performing wave soldering welding: performing welding operation on the PCB by the wave soldering machine; (5) taking out the PCB: taking out the PCB from the tray of the wave soldering machine; (6) detection: detecting the welding quality of the PCB, if the welding quality is qualified, obtaining the finished product, and if the welding quality is disqualified, performing the next step on the disqualified product; and (7) repairing welding: performing manual repairing welding operation on detected poor welding points of the PCB, and obtaining the finished product.

Description

technical field [0001] The invention relates to the technical field of PCB board welding, in particular to a PCB board plug-in welding process. Background technique [0002] At present, the wave soldering process is usually used for soldering plug-ins on PCB boards, and the process is as follows: plug-in-inspection-dip soldering-cutting feet-taking board-testing-repair soldering-finishing; that is, the components are first Insert the PCB board, then check visually to confirm that the components are inserted in place, then perform soldering operations with manual dip soldering, and then use a sawing machine to cut the long legs of the components soldered on the PCB board, and cut the PCB board from Take it out from the tray, conduct quality inspection on the soldered PCB board, correct some bad solder joints by manual welding, and finally get the finished product. [0003] This welding process has the following problems: [0004] 1), the components are long, the plug-in spe...

AI Technical Summary

Problems solved by technology

[0004] 1), the components are long, the plug-in speed is slow, and the efficiency is low;

[0005] 2), manual dip soldering, the operation requires certain skills, and the production efficiency is low; manual work, easy to fatigue, low safety; product quality is not easy to guarantee, there are more residues, and the production quality is low;

[0006] 3) To cut the feet, usually use a saw disc cutting machine, which has high noise, low safety performance (lack of protection, easy to hurt hands), low production efficiency, and often needs auxiliary scissors to cut the feet, and the production efficiency is especially low;

[0007] 4) Due to the long legs of the component, often due to the too close spacing of the legs, a large tin block will be formed after passing the tin, which will affect the cutting and even damage the cutting machine;

[0008] 5) Due to the push and pull force during cutting, tiny cracks will form between the solder of most of the solder joints and the part feet, resulting in certain hidden dangers in the quality of the products;

[0009] 6), the above process increases the probability of bad solder joints, increases the workload of repair welding work, and affects production efficiency;

[0010] 7) The legs of the cut-off components are all stained with a lot of solder, resulting in excessive loss of solder, resulting in a certain cost waste

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