Spot Welding Processing Basics Part 2

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The causes of insufficient current value include: (1) If it is a surface-treated steel plate, there may be a difference in weight (plating thickness) compared to the actual product. (2) The working posture is different. (3) In spot welding of nickel-plated materials, it may feel as if it has melted at first glance, but in reality, only the plated part has melted, and the important metal parts have not fused together. (4) Divergence. (5) Contact at the arm part → Resulting in divergence. There are various factors. (1) The treated steel plates are those that have undergone plating treatment by material manufacturers, and of course, they are guaranteed to meet quality standards. However, it is also true that there are various differences in the amount of dross in laser processing, differences in angles during bending processing, and how melting occurs during welding. These differences can be felt even in spot welding operations. A common story is, "It melted in the test piece, but it didn't hold in the actual product." This is often due to differences in the production lot of the materials. The basic principle is to conduct tests using the same material lot. Precision Sheet Metal, Tsuru Co., Ltd.

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