Weld preparation using automated plasma arc gouging

Posted on 03/30/2016
Posted by Hypertherm

When parts are prepared for welding, their edges can be beveled to produce a groove for the weld. A common practice in weld preparation is back gouging, the removal of weld and base metal by carbon arc gouging or by grinding from the other side of a partially welded joint to ensure complete fusion and penetration upon subsequent welding from that side.

Plasma Back gouging to create a grove for the weld Side profile of a weld with face reinforcement after plasma arc gouging

Example of Powermax gouging for weld preparation:

Customer application

Back gouging seams on rail- cars.

Existing method and challenges

Hand arc gouging with carbon arc. The carbon arc gouging process is noisy, takes skill to operate and produces a lot of smoke. The high pressured air blows the molten metal around the work area. Use of carbon arc also requires that the entire gouge has to be grinded after the gouge is made.

Powermax® solution

Powermax125® plasma cutting system using a track cutter to automate the process.

Powermax results

The gouge was very clean compared to the carbon arc gouge with minimal clean up and grinding. The consistency of width and depth of gouge is far superior to carbon arc since the process was automated.

Posted on 03/30/2016
Posted by Hypertherm