The welding pressure in medium frequency spot welding machines is a crucial step. The size of the welding pressure should match the welding parameters and the properties of the workpiece being welded, such as the size of the projection and the number of projections formed in one welding cycle.
The electrode pressure directly affects heat generation and dissipation. When the parameters remain unchanged, excessive electrode pressure can prematurely crush the projections, losing their inherent function. It can also reduce joint strength due to decreased current density. Both excessive and insufficient pressure can cause splashing, which is detrimental to spot welding.
Factors contributing to false welding:
False welding, which many of us have encountered during work, occurs when the welding material does not form an alloy structure with the surface of the workpiece but merely adheres to it. False welding can be avoided, but sometimes it goes unnoticed. When the surface of the metal to be welded becomes contaminated with dirt or oil, it can lead to poor electrical contact, resulting in incorrect circuit operation. Therefore, regular use of new electrodes or electrode grinding is essential.
Ensuring reliable electrical connections:
Welding is the primary means by which electrical connections are physically realized in electronic circuits. Solder joints are formed not by pressure but by the formation of a solid alloy layer during the welding process. Initially, problems with solder joints may not be easy to detect during testing and operation. While such joints may conduct electricity in the short term, over time and with changing conditions, the contact layer oxidizes and separates, leading to circuit interruption or malfunction. When encountering such problems, visual inspection or deeper examination is necessary, as this is a noteworthy issue in metal manufacturing.
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Post time: Mar-04-2024