The quality inspection of weld spots produced by medium-frequency inverter spot welding machines typically involves the following aspects: 

1. Visual Inspection:

Observe the appearance of the weld spot, including whether the welding surface is flat and uniform, and whether there are defects such as cracks, pores, or slag inclusions.

Check whether the shape and size of the weld spot meet the requirements, such as the diameter and height of the weld spot.

Check the deformation around the weld spot, such as whether there is excessive thermal deformation or cold deformation.

2. Metallographic Examination:

Observe the metal structure of the weld spot using a metallographic microscope, checking the grain size and grain boundary clarity.

Check whether there are uneven or abnormal structures in the weld area, such as excessively large grains, overheated areas, or undercooled areas.

3. Welding Strength Testing:

Conduct tensile or shear tests to test the strength of the weld spot. Determine whether the tensile strength or shear strength of the weld spot meets the requirements according to product or standard specifications.

4. Welding Performance Testing:

Perform performance tests on the weld spot, such as wear resistance, corrosion resistance, and heat resistance, to ensure that the weld spot has good performance and stability in actual use.

5. Non-destructive Testing:

Use non-destructive testing methods such as ultrasonic testing and radiographic testing to assess the quality of the weld spot and detect possible welding defects such as pores, slag inclusions, and cracks.

6. Other Special Inspections:

Depending on specific requirements, special inspections such as electrical performance testing, sealing testing, and airtightness testing may be required.

For special requirements or critical parts, special process verification or testing may be necessary, such as impact performance testing of welded joints and high-temperature and low-temperature performance testing of welded joints.

In summary, the quality inspection of weld spots produced by medium-frequency inverter spot welding machines covers multiple aspects, including visual inspection, metallographic examination, welding strength testing, welding performance testing, and non-destructive testing. Through comprehensive evaluation, the quality of the weld spot is ensured to meet product design and standard requirements, thereby guaranteeing the safety, reliability, and stability of the welded components.

If you have welding machine requirements, please contact Ms. Zhao

E-Mail: pdkj@gd-pw.com

Phone: +86-13631765713