TOPTIG process is a major innovation in the world of automatic welding. Developed in the Lincoln Electric research center, TOPTIG is a new process development from arc welding classical solutions. This new process can be used effectively on carbon or stainless steel plates up to 3 mm or on galvanized sheets with weld brazing. The activities sectors are:
- Automotive subcontracting,
- Fine boiler making,
- Metal furniture,
- Aeronautics subcontracting.
TOPTIG innovative process principle
In TIG automatic welding mode, the filler wire is fed into the weld pool in front of the torch. In the TOPTIG process, the filler wire is fed through the welding nozzle in the area where the temperature is the highest. The wire therefore melts into small droplets exactly as in the MIG process. The use of a pulsed current synchronized with wire gives better control over the welding operation.
Compared with a traditional automatic TIG torch, the compactness of the wire lead-in incorporated into the nozzle gives accessibility at an angle comparable with that obtained using a MIG/MAG torch.
This increases the scope for robotization and extends the range of workpieces which can be welded automatically.
TOPTIG allows a better accessibility for welding complex structures. It offers very good performance concerning speed, and quality (spatter free).
Lincoln Electric offers two types of TOPTIG installation with flat or pulsed current. It can drive a constant or pulsed wire feed which is synchronized with the welding current.