Oxy-fuel cutting tip having gas outlet passages

DETAILED DESCRIPTION It is therefore an object of the present invention to provide a cutting tip which is simple and inexpensive to manufacture.
It is a further object of the present invention to provide a cutting tip formed of several parts, and which does not require deep drilling or extensive machining.
It is a further object of the invention to provide a cutting tip capable of producing a laminar flow of mixed preheat oxygen and a fuel gas in a short axial length.
According to one aspect of the invention, the above and other objects are achieved by an oxy-fuel tip comprising a tip core, a skirt concentrically surrounding the tip core so as to form an annular passage therebetween, and inlet means for supplying at least a fuel gas to the annular passage.
An outlet portion of the skirt is configured to form gas outlet passages in cooperation with the tip core.
The outlet portion of the tip core has an annular chamfer which extends beyond the outlet end of the skirt.
According to another feature of the invention, an oxy-fuel cutting tip comprises a mixer having cutting oxygen, preheat oxygen and acetylene inlets, a tip core fittable into the mixer so as to communicate with the cutting oxygen inlet and having a cutting oxygen passage extending therethrough to an outlet end thereof, and a skirt concentrically surrounding the tip core so as to form an annular passage therebetween.
The skirt is formed to define a tapered outlet end having internal grooves.
An opposite end of the skirt opposite the outlet end is fittable into the mixer such that the annular passage communicates with the preheat oxygen and fuel inlets and such that the internal grooves cooperate with the tip core to define outlet passages for the annular passage.
The outlet portion of the tip core has an annular chamfer which extends beyond the outlet and of the skirt.