Weld preparation using plasma gouging

Posted on 29/03/2016
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 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.

Example of Powermax gouging for weld preparation:

Customer application

Back gouging seams on rail- cars.

Existing method and challenges

Hand gouging with carbon arc. The carbon arc process is noisy, takes skill to operate and produces a lot of smoke. 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 29/03/2016
Posted by Hypertherm