Contact tip itself wear, stems from the contact tip rising temperature due to continuous wire feed friction in contact tip export wear. In the robot welding, it often lead to calibration errors and affect production efficiency. There are some ideas of reducing the contact tip temperature, including in the contact tip components, contact tip structure processing and contact tip material: brass, copper, CUCRZR and other materials, of which brass is worst, copper slightly better, CUCRZR is the best.

 

In addition, contact tip processing accuracy is also significant, due to the precision of the processing equipment or other problems. If the inner hole smoothness and concentricity is not good enough, the wire feeding will be affected, then affect the welding quality.

 

The welding wire is often installed in cylinder or plate with burrs or ribs, which may affect the contact between the welding wire and contact tip. In welding, contact tip should provide minimal friction on the premise of stable conduction. The life of contact tip of dirty welding wire may be only 1/3 of that of clean welding wire. The way to judge the quality of welding wire and the degree of annealing stress elimination is the performance of the straightening. The experiment is: 50mm at the front of the torch nozzle, Whether the welding wire can be bent automatically? Bend at the front explains the wire is too soft and the back bend means the welding wire is too hard. The hard welding wire may consume contact tip more quickly. In addition, if the welding liner is bent from the wire feeder to the welding torch, the wire will also be bent.