What measures should be taken to ensure the welding quality of the intermediate frequency spot welder?
The application range of the medium frequency spot welding machine is very large, and it can be produced in large quantities such as national aerospace, shipbuilding, construction, water conservancy, and large, medium and small enterprises. Small people can also weld their own crafts at home. Although the medium frequency low-cost capacitor discharge welding machine china is suitable for a large number of welding production, However, if there is no economic loss in terms of quality and quality, then avoiding such accidents requires non-destructive testing.
The so-called non-destructive testing can be divided into two types:
First: visual inspection, seal inspection, and joint strength test under a specified load.
Second: by means of physical inspection methods, X-ray inspection, ultrasonic inspection, eddy current inspection, thermal image method and inspection, and magnetic particle inspection can be utilized.
Therefore, strengthening the management of quality is the foundation of our first priority:
Pressure detection: The welding heat is greatly affected by the contact resistance between the electrode and the workpiece. The pressure during welding is stable. Therefore, it is necessary to use a pressure tester for inspection. There is also a phenomenon that the electrode cannot follow the workpiece and abnormal splash occurs. The welding head needs to be inspected.
The electrode is too hot: high-quality electrodes are selected, and the inferior electrodes cause the electrode to be too hot, which affects the life of the electrode itself, resulting in substandard quality.
Electrode grinding: The electrode is a consumable. As the number of welding increases, oxides and grease will appear on the surface of the electrode, which will increase the resistance. Regular grinding with a dresser is required, and a new electrode should be replaced according to the number of welding times.
Workpiece accuracy: No workpiece is selected according to the welding parameters. For example, the thickness and material of the workpiece will lead to an increase in the welding defect rate.
Current test: The reasons that affect the current change are: power supply, power supply fluctuation, overload use.
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