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Arc striking welding method for stainless steel welding
There are many different welding methods for stainless steel that can produce different welding effects, and arc striking is the basic operating technique of electrode arc welding. Stitching is the process of igniting a welding arc during arc welding. The contact method is used for arc striking in electrode arc welding, and there are two methods of arc striking: scratch method and impact method. Below, we will introduce the specific operation methods of these two methods in detail, as well as some matters needing attention during arc striking.
A. Scratch method: The action of the arc striking method is like striking a match. Align the arc striking end of the welding rod with the weld or groove surface of the part to be welded, gently scratch the surface of the weldment with wrist force (the scratch distance is 10-15mm), and then quickly lift the welding rod 2-4mm to ignite the arc and stabilize it, as shown in Figure 4-1 (a). In order to prevent the formation of air holes at the arc striking point, the scratch method is generally used for arc striking of alkaline electrodes in practical production.
Impact method (also known as direct impact method) Arc striking The impact method is to align the arc striking end of the welding rod with the position to be welded, then bend down the wrist to gently touch the weldment, and then quickly lift the welding rod 2 to 4mm to ignite the arc and stabilize it, as shown in Figure 4-1 (b). This arc striking method does not scratch the surface of the weldment, and is not limited by the size and shape of the weldment surface. Therefore, the impact method is mainly used for arc striking in production. The impact arc striking method cannot use excessive force, otherwise the coating at the arc striking end may crack or even fall off, affecting arc striking and welding.
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