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Indian Institute of Technology (IIT) Roorkee 
System protected gas metal arc welding torch nozzle for ultra narrow gap welding of thick section 
P. K. Ghosh and Ramkishor 
Indian Institute of Technology (IIT) Roorkee 
Application type:
Applied - 2016-09-30 
Application Number:
Applied at:
Entered by:
Indian Institute of Technology (IIT) Roorkee 
The proposed application makes a disclosure regarding gas metal arc welding torch head for ultra narrow gap welding of thick section having at least thickness of 25mm. According to the inventive concept of the invention, the torch head has been designed without the longitudinal side walls. So that the same can be inserted inside the narrowest possible weld groove. This also avoids burning of the side wall of said torch head being close to the electrode tip. Thus, the present invention introduces best alternative to the general approach of increase in wall thickness of the copper nozzle to avoid burning thereof as it consequently enhances the width of the nozzle head. Increase of nozzle head width is not compatible to the objective of exploring GMAW with narrowest possible groove width in case of thick section butt welding.  

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