Metallurgical apparatus – Means for cutting solid metal with heat – e.g. – blowpipes – Means for removing surface material – e.g. – scarfing
Patent
1993-03-19
1994-10-25
Kastler, Scott
Metallurgical apparatus
Means for cutting solid metal with heat, e.g., blowpipes
Means for removing surface material, e.g., scarfing
266 48, B23K 706
Patent
active
053582217
ABSTRACT:
A block assembly for a thermochemical scarfing apparatus which allows a greater diagonal standoff distance from the metal workpiece during preheating. The block assembly comprises a base member and an extension releasably joined to the base member, and the base member and extension include an internal network of gas distribution lines for separately delivering both oxygen and fuel gas to each of a plurality of discharge openings which are disposed in a longitudinal row along the front face of the extension. A nozzle insert is releasably mounted in each discharge opening, such that during preheating, the oxygen may be discharged from each discharge opening as a central high velocity stream and the fuel gas may be discharged as a concentric stream which coaxially surrounds the central stream, and so that the momentum of the central stream is maintained. The effective flame heating distance thereby may be extended during preheating, and the block assembly may be moved back from the workpiece a significant standoff distance so as to avoid damage from dislodged molten metal slag.
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Dawson, Jr. John G.
Gusky Frank J.
Showalter Michael S.
Kastler Scott
The ESAB Group, Inc.
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