Several detection methods for solder joints of medium frequency spot welding machines

The quality of the mid-frequency spot welding machine depends on the tearing test of the solder joints. The quality of the solder joints is not only the appearance, but also emphasizes the overall performance, such as the welding physical characteristics of the solder joints. In practical applications, the detection of solder joints is often based on destructive tests, that is, smashing, prying, and twisting. There is no scientific basis, and it is impossible to obtain welding data.

Non-destructive testing solves this problem perfectly. Basically, there are the following types: ultrasonic testing, radiographic testing, magnetic particle testing, penetrant testing, eddy current testing. Unconventional non-destructive testing technologies include acoustic emission, leak detection, optical holography, infrared and external thermal imaging, and microwave testing.

In practical applications, radiographic inspection is mostly used because it is intuitive and the films are easy to archive. Penetrant is more cost-effective and of course more convenient. However, ordinary factory products do not have such high requirements. Just make a penetrant. If you are a little more careful, you can make a cross-section of the solder joints to see the quality of the solder joints.

There are many methods for simple inspection of solder joints. If the requirements are not particularly high, there is no need to do radiographic inspection and only simple inspection is enough. Ways not to damage solder joints:

1. Insert a flat iron bar or screwdriver between the two pieces of metal welded by the spot welder, apply pressure on the tail of the iron bar or screwdriver, and form a gap of 2.6-3.7 mm between the metal plates. If the solder joints are normal at this time , it means it is a normal solder joint and the welding effect is good.

2. If the thickness of the board is inconsistent, the prying distance should be between 1.6-2.6 mm. If you persist in prying, the solder joints will be damaged. If tearing or twisting tests are performed, the welding slag should be removed after completion.

Suzhou Agera Automation Equipment Co., Ltd. is an enterprise engaged in the development of automated assembly, welding, testing equipment and production lines. It is mainly used in home appliance hardware, automobile manufacturing, sheet metal, 3C electronics industries, etc. According to customer needs, we can develop and customize various welding machines, automated welding equipment, assembly and welding production lines, assembly lines, etc., to provide appropriate automated overall solutions for enterprise transformation and upgrading, and help enterprises quickly realize the transformation from traditional production methods to mid-to-high-end production methods. Transformation and upgrading services. If you are interested in our automation equipment and production lines, please contact us: leo@agerawelder.com