At the 29th China Welding Expo 2015, a group of " robot aunts" laughed and performed the small apples of Shenqu, and the movements were in place. The posture, the charm, the audience expressed drunkenness...
Closer to home, this group of "no business" welding robots can dance gracefully. The robot software and hardware must have built-in excellent motion control technology to provide stable, reliable and safe protection for the wonderful and smooth stage performance. It is not difficult to imagine that they will certainly have a good performance in the production of welding, which deserves further attention.
Robot over-welding
Welding characteristics:
1. The molten metal falls due to gravity, and the shape and size of the molten pool are not suitable for control.
2. It is difficult to transport the strip, and the surface of the weldment should not be flattened.
3. It is prone to defects such as slag inclusion, incomplete penetration, weld bead and poor weld formation.
4. The melted weld metal splashes and spreads, which is easy to cause burns.
5. The overhead welding is less efficient than other locations.
Welding points:
1. Butt welds are welded up. When the weldment thickness is ≤ 4mm, the I-type groove is used, and the welding rod of φ3.2mm is selected. The welding current should be moderate; when the welding thickness is ≥5mm, multi-layer multi-pass welding should be adopted.
2. T-joint welds for overhead welding. When the welding feet are less than 8mm, single-layer welding should be used. When the welding feet are larger than 8mm, multi-layer multi-pass welding is adopted.
3. According to the specific situation, adopt the correct method of transport:
(1) When the size of the solder fillet is small, the linear or linear reciprocating transport strip is used, and the single layer welding is completed; when the solder fillet size is large, the multi-layer welding or the multi-layer multi-pass welding strip can be used, and the first layer should be adopted. For straight-line transport, the remaining layers can be selected with oblique triangle or oblique ring.
(2) Regardless of the method of transport, the excessive weld metal to the molten pool should not be excessive.
Robot flat welding
Welding characteristics:
1. The fusion welding metal mainly relies on its own weight to the molten pool.
2. The shape of the molten pool and the metal of the molten pool are easy to maintain and control.
3. Welding the same thickness of the metal, the welding current of the flat welding position is larger than the current of other welding positions, and the production efficiency is high.
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