Apparatus for selectively scarfing metal bodies

Claim 1

In a scarfing unit comprising flat upper and lower surfaces defining therebetween a wide continuous slot nozzle adapted to discharge a sheet-like stream of oxygen gas through the front end of said nozzle at a zone extending across the metal body to be scarfed, said scarfing unit containing a multiplicity of orifices through which oxygen gas is directed into the back end of said nozzle, the improvement comprising means for rendeRing the scarfing unit capable of selectively scarfing a preselected portion of said metal body narrower than the width of said nozzle while leaving the remaining portion of said metal body unscarfed, comprising: means for restricting the flow of said oxygen gas through a section of said nozzle, said flow restricting means being disposed within said nozzle in such manner as to be substantially contiguous with the upper and lower surfaces of said nozzle and being narrower in width than the width of said nozzle, and said means having sides angularly shaped so as to create a change in the direction of a portion of the oxygen stream passing through the oxygen slot such that the oxygen stream impinging upon the preselected portion of the metal body prevents molten metal from running over on to the remaining unscarfed portion of the metal body corresponding to the width of said flow restricting means.