The robot welding adopts rich argon mixed gas shielded welding. The welding defects that occur during the welding process generally include welding deviation, undercutting, porosity, etc. The specific analysis is as follows:
(1) The occurrence of welding deviation may be due to incorrect welding position or problems in finding the welding gun. At this point, it is necessary to consider whether the TCP (center point position of the welding gun) is accurate and make adjustments accordingly. If this situation occurs frequently, it is necessary to check the zero position of each axis of the robot and recalibrate it for correction.
(2) The occurrence of undercutting may be due to improper selection of welding parameters, incorrect welding gun angle or position. The power can be adjusted appropriately to change the welding parameters, adjust the posture of the welding gun, and adjust the relative position between the welding gun and the workpiece.
(3) The appearance of pores may be due to poor gas protection, thick primer on the workpiece, or insufficient drying of the protective gas. Corresponding adjustments can be made to address this issue.
(4) Excessive splashing may be due to improper selection of welding parameters, gas composition reasons, or excessive wire extension length. The power can be adjusted appropriately to change the welding parameters, the gas proportioner can be adjusted to adjust the mixed gas ratio, and the relative position between the welding gun and the workpiece can be adjusted.
(5) After cooling at the end of the weld seam, an arc pit is formed. When programming, adding a buried arc pit function in the work step can fill it up. 3.2 Analysis and Handling of Robot Malfunctions.