Tap hole drill for steelmaking vessel

Details Tap hole drill for steelmaking vessel Tap hole drill for steelmaking vessel

1996-02-14

1998-04-07

Howell, Daniel W.

Cutting by use of rotating axially moving tool

With work-engaging structure other than tool or tool-support

Work-gripping clamp

408108, 408129, 408236, 173 32, B23B 3914

Patent

active

057356475

ABSTRACT:
A drilling apparatus for drilling a worn and/or damaged tap hole refractory liner sleeve from a tap hole nozzle of an oxygen blown steelmaking vessel, the apparatus including an elongated, hollow boom structure with an elongated drill shaft rotatably disposed within the boom structure, motor means for rotating the drill shaft and moving it in both directions within the boom structure, and a clamp means at the outer end of the boom structure adapted to attach the outer end of the boom structure to the tap hole nozzle in an accurate, axially aligned position. A drill bit for use with the above drilling apparatus comprises a plurality of conventional rock drill bits attached to a base plate equally spaced in a pair of concentric circular arrangement around an axis of the base plate.

REFERENCES:
patent: 591135 (1897-10-01), Kerry
patent: 3961673 (1976-06-01), Wolters et al.
patent: 4403892 (1983-09-01), Kane
patent: 4475606 (1984-10-01), Crow
patent: 4896663 (1990-01-01), Vandewalls
patent: 5129464 (1992-07-01), Richier
patent: 5273124 (1993-12-01), Lloyd et al.
patent: 5279375 (1994-01-01), Tibbitts et al.

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