Classification of welding robots

1. Arc welding robot, 2. Spot welding robot.

Features of arc welding robot:

The arc welding process is more complicated than the spot welding process. The tool center point (TCP), that is, the movement path of the wire end, the posture of the welding gun, and the welding parameters require precise control.

Therefore, in addition to the basic functions described above, the arc welding robot must also have some functions that meet the requirements of arc welding.

Even if theoretically speaking, a 5-axis welding robot can be used for arc welding, it is more difficult to use a 5-axis robot for complex welds.

Therefore, unless the weld seam is relatively simple, a 6-axis robot should be used as much as possible.

Features of spot welding robot:

Spot welding has relatively low requirements on the robots used.

Because spot welding only needs to be mastered, there are no strict technical requirements for the moving path of the welding gun between points.

This is why the welding robot can only be used for spot welding at the earliest.

Spot welding robots must not only have enough load-bearing capacity, but also need to move quickly between points, the process must be stable, and the positioning must be accurate to reduce working time and improve the efficiency of the robotic arm.

The load capacity of the spot welding robot depends on the style of welding gun used.

For welding guns separated from the transformer, a robot with a load of about 40 kg is sufficient.

However, on the one hand, this kind of welding tongs has a large power loss due to the long secondary cable, and it is not conducive to the robot to extend the welding tongs into the workpiece for welding;

On the other hand, the cable keeps moving with the movement of the robot, and the loss of the cable is fast. Therefore, companies currently use integrated welding guns.

The weight of this welding tongs together with the transformer is about 75kg. Considering that the robot has enough load-bearing capacity, it can send the welding tongs to the space position with a faster acceleration for accurate welding. Generally, a heavy-duty robot with a load of about 130kg is used.

In order to meet the requirements of the short-distance fastness of the welding gun during continuous spot welding. The new heavy-duty welding robot adds the function of 5cm displacement in 0.3s.