Xizhang welding steel technique: thick plate and thin plate

Xizhang welding robots provide you with welding skills for thick and thin plates:

1. What should be done if the thickness of the steel workpiece exceeds the maximum welding current that the welding machine can achieve when using gas metal arc welding (GMAW) and flux cored wire gas arc welding (FCAW) to weld steel workpieces?

Answer:

Preheating the metal before welding is the solution. Preheat the welding area of the workpiece using propane, standard gas or acetylene welding torch, with a preheating temperature range of 150-260 ℃, and then proceed with welding. The purpose of preheating the metal in the welding area is to prevent the weld area from cooling too quickly, in order to avoid cracking or incomplete fusion.

2. If it is necessary to use melting electrode gas shielded welding or flux cored wire gas shielded welding to weld a thin metal cover to a thicker steel pipe, if the welding current cannot be adjusted correctly during welding, it may lead to two situations: one is to reduce the welding current to prevent the thin metal from burning through, so it is impossible to weld the thin metal cover to the thick steel pipe; Secondly, excessive welding current can burn through thin metal caps. How should this be handled?

Answer:

① Adjust the welding current to avoid burning through the thin metal cover, preheat the thick steel pipe with a welding torch before welding, and then use thin plate welding technology to weld the two metal structures.

② Adjust the welding current to adapt to the welding of thick steel pipes. During welding, maintain a 90% residence time of the welding arc on the thick steel pipe and reduce the residence time on the thin metal cover.

3. How to weld galvanized or chromium containing materials to another part?

Answer:

Before welding, file or polish the area around the weld seam, as galvanized or chromium containing metal plates can contaminate and weaken the weld seam, and release harmful gases during welding.

Xizhang intelligent welding robots are safe and reliable. We provide different models of equipment according to customer needs, such as welding robot single machine workstations, ground rail intelligent welding robots, cantilever intelligent welding robots, etc. We customize a complete intelligent production line integration solution for steel structures based on customer processing needs and support on-site factory inspections. We welcome interested enterprises to contact us.