Mid-frequency spot welding machine weld quality inspection

Mid-frequency spot welding machines typically have two methods for inspecting welds: visual inspection and destructive testing. Visual inspection involves inspecting each project, and if metallographic examination is used with microscope photos, the welded fusion zone must be cut and extracted and then corroded. However, concluding based solely on visual inspection is insufficient; destructive testing is necessary.

Destructive testing usually involves tearing experiments to confirm by tearing the welded base material (one side showing circular holes, the other side showing button-like residues). In addition, there is also a method of tensile strength testing using a tensile tester.

To accurately assess weld quality, destructive testing of welds should be performed. Destructive test methods include: mechanical test method, on-site test method, metallographic relief method. The former uses a mechanical performance tester to measure tensile shear, tensile, compression, torsion, impact, and other properties.

However, mechanical test methods have the disadvantage of requiring specimens of appropriate shapes and clamping the specimens in a certain position on the tester. The advantage is that they display performance values. Metallographic inspection is used to measure the fusion zone size and identify welding defects.

Good joint quality should be reflected in having a certain strength and plasticity, especially the latter should be given more attention. Due to the characteristics of the process itself, high-quality joints with properties similar to the base material can be obtained under appropriate conditions.

Suzhou Agera Automation Equipment Co., Ltd. is engaged in the development of automated assembly, welding, testing equipment, and production lines, mainly applied in household appliances, hardware, automobile manufacturing, sheet metal, 3C electronics industries, etc. We can develop customized welding machines and automated welding equipment according to customer needs, including assembly welding production lines, assembly lines, etc., providing suitable automation overall solutions for enterprise transformation and upgrading, helping companies quickly transition from traditional production methods to high-end production methods. If you are interested in our automation equipment and production lines, please contact us: leo@agerawelder.com