Straight seam welding is the most numerous category among all welding conditions, hence straight seam welders constitute the largest group of automatic welding machines. There are roughly five major types of straight seam welds.
1. The straight seam of double-plate splicing is as shown in the figure
2. The straight seam of the merged barrel body is as shown in the figure

3. The U-shaped double straight seam is as shown in the figure

4. Merging straight seams of conical barrel bodies

5. The double triangle splicing straight seam is shown in the figure

Different types of straight seams require different straight seam welding machines, and even for the same type of straight seam, different welding machines may be selected.
For example, in the pipe manufacturing industry, the straight seam welding of double-plate splicing requires the use of a cutting and welding integrated machine equipped with a plasma welding machine or an argon arc welding power source (which has certain time requirements when it is an automatic welding machine for thin plate straight seams).
If it is a double-plate splicing straight seam in the pressure vessel industry, a flat straight seam welder equipped with a MIG welding power source or a submerged arc welding power source (with requirements for welding strength and air tightness) is required.
Therefore, all straight seams cannot be generalized, especially for automatic straight seam welding machines.
The material, thickness, weld seam requirements, welding strength, and weld bead formation after automatic welding are all crucial factors in selecting a straight seam welder. Understanding the relevant knowledge of a straight seam welder is a necessary condition for producing products with straight seam welds.
1. The straight seam of double-plate splicing is as shown in the figure
2. The straight seam of the merged barrel body is as shown in the figure

3. The U-shaped double straight seam is as shown in the figure

4. Merging straight seams of conical barrel bodies

5. The double triangle splicing straight seam is shown in the figure

Different types of straight seams require different straight seam welding machines, and even for the same type of straight seam, different welding machines may be selected.
For example, in the pipe manufacturing industry, the straight seam welding of double-plate splicing requires the use of a cutting and welding integrated machine equipped with a plasma welding machine or an argon arc welding power source (which has certain time requirements when it is an automatic welding machine for thin plate straight seams).
If it is a double-plate splicing straight seam in the pressure vessel industry, a flat straight seam welder equipped with a MIG welding power source or a submerged arc welding power source (with requirements for welding strength and air tightness) is required.
Therefore, all straight seams cannot be generalized, especially for automatic straight seam welding machines.
The material, thickness, weld seam requirements, welding strength, and weld bead formation after automatic welding are all crucial factors in selecting a straight seam welder. Understanding the relevant knowledge of a straight seam welder is a necessary condition for producing products with straight seam welds.








