Advantages

1. in one welding cycle can be welded more solder.

2. Since the current density to bump, high current density, it can be low current welding, and can be reliably formed a small nugget.

3. the projection welding position accurate, same size, resulting in more uniform intensity of the welding head.

4. can achieve welding workpieces with different structures. Because of the current focus, overcome the disadvantage of spot welding nugget that migration, projection welding of two workpiece thickness can be more than 6:1.

5. as a result of large flat electrodes, and the bump is set in a workpiece, workpiece can minimize the other exposed surfaces and indentation.

6. compared with spot welding machine, oil, rust, oxidation of the surface layer, du and other coating on projection welding of small, but clean surface continues to get more stable quality.