Welding robots are industrial robots engaged in welding (including cutting and spraying). According to the definition of standard welding robots in industrial robots by the International Organization for Standardization (ISO), an industrial robot is a multi - purpose, reprogrammable automatic control manipulator with three or more programmable axes, which is used in the field of industrial automation.

To adapt to different uses, the mechanical interface of the last axis of the robot is usually a connecting flange, which can be equipped with different tools or end - effectors. A welding robot is equipped with a welding tong or a welding (cutting) gun on the flange of the last axis of an industrial robot, enabling it to perform welding, cutting or thermal spraying.

Problems and solutions in the application of welding robots

1. Welding deviation problem

It may be that the welding position is incorrect or there is a problem when the welding gun is searching.

At this time, it is necessary to consider whether the TCP (the position of the welding gun center point) is accurate and make adjustments. If this situation occurs frequently, it is necessary to check the zero positions of each axis of the robot and re - zero them for correction.

2. Undercutting problem

It may be that the welding parameters are improperly selected, the angle or position of the welding gun is incorrect, and appropriate adjustments can be made.

3. Porosity problem

It may be that the gas protection is poor, the primer of the workpiece is too thick, or the shielding gas is not dry enough. Corresponding adjustments can be made to solve the problem.

4. Excessive spatter problem

It may be that the welding parameters are improperly selected, due to the gas composition, or the wire extension length is too long. The welding parameters can be changed by appropriately adjusting the power of the machine, the proportion of the mixed gas can be adjusted by adjusting the gas proportioning instrument, and the relative position between the welding gun and the workpiece can be adjusted.

5. The problem of forming a crater after cooling at the end of the weld seam

The crater filling function can be added to the working steps during programming to fill it.