Checkpoints during welding

Introducing an example of our teaching as a countermeasure against welding defects in automobile parts factories. At the customer’s site, there were beat defects and blow holes, and in order to eliminate them, Shoei Techno Service technicians checked the site conditions and improved the welding conditions. Zinc has a low melting point (iron: about 1500 ° C, zinc: about 900 ° C), and zinc vaporizes and pulls up during welding. .. Therefore, as a countermeasure, welding while vaporizing and removing zinc with high heat input during welding is a method with a high possibility of improving welding defects. There are two main points when teaching. The first point is to make the torch posture straight or receding in order to increase heat input. There is a possibility that steam may be entrained at the forward angle, and it may be possible to expect the effect of sufficiently heating the welding pond and the base metal and increasing the heat input by setting the angle to face-to-face or receding. The second point is that the welding speed is slower than welding non-galvanized steel sheets. I think it’s easy to imagine that the slower the speed, the higher the heat input. If the voltage is increased to increase the heat input, the concentration of the arc will deteriorate, so select a voltage that matches the current. The above points are the points in galvanized welding.

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