Do You Know The Characteristics Of Arc Welding Robots?

We learned from Industrial Robots Manufacturers that the arc welding process is much more complicated than the spot welding process. The tool center point (TCP), that is, the motion trajectory of the wire end, the welding gun posture, and the welding parameters require precise control. Therefore, in addition to the general functions described above, the arc welding robot must have some functions suitable for arc welding requirements.

Although theoretically speaking, an Industrial Robots with 5 axes can be used for arc welding, but it is difficult to use a robot with 5 axes for complex welds. Therefore, unless the weld is relatively simple, a 6-axis robot should be used as much as possible.

In addition to the aforementioned Arc Welding Robot for "zigzag" corner welding or small diameter round weld welding, its trajectory should be close to the taught trajectory, and it should also have software functions for different swing patterns for programming. It is selected for weaving welding, and the robot should automatically stop moving forward at the stopping point in each cycle to meet the technological requirements. In addition, there should be contact location, automatic search for the starting point of the weld, arc tracking and automatic arc re-ignition functions.

Robot Manipulator

Arc welding robots mostly use gas shielded welding methods (MAG, MIG, TIG), and the usual thyristor, inverter, waveform control, pulse or non-pulse welding power sources can be installed on the robot for arc welding. Since the robot control cabinet adopts digital control, and the welding power supply is mostly analog control, it is necessary to add an interface between the welding power supply and the control cabinet. In recent years, foreign robot manufacturers have their own specific supporting welding equipment, and the corresponding interface boards have been broadcast in these welding equipment, so there is no additional interface box in the arc welding robot system in China. It should be pointed out that the arc time occupies a large proportion in the work cycle of the arc welding robot, so when selecting the welding power source, the power source capacity should generally be determined according to the continuous rate of 100%.

The wire feeding mechanism can be mounted on the upper arm of the robot or placed outside the robot. The hose between the welding gun and the wire feeder of the former is shorter, which helps to maintain the stability of the wire feeding. Sending the welding torch to certain positions makes the hose in a state of multiple bends, which will seriously affect the quality of the wire. Therefore, the installation method of the wire feeder must consider the issue of ensuring the stability of the wire feed.