Metallurgical apparatus – Means for cutting solid metal with heat – e.g. – blowpipes – Having torch spacing means
Patent
1977-12-15
1979-09-25
Bell, Paul A.
Metallurgical apparatus
Means for cutting solid metal with heat, e.g., blowpipes
Having torch spacing means
266 77, B23K 710
Patent
active
041688228
ABSTRACT:
A mounting and guide assembly for cutting torches for mounting same on a movable frame for movement over the workpiece, with the mounting and guide assembly comprising a torch mounting arrangement including a vertically disposed double acting hydraulic cylinder and piston device having a piston rod structure projecting from either end of its cylinder and mounting at the lower end of the piston rod a torch mounting head that releasably and adjustably secures the torch in place for positioning the torch nozzle for correct application to the workpiece. The torch mounting head is equipped with a feeler or guide member mounted for a lost motion movement range axially of the torch nozzle and having a plurality of feeler elements in coplanar arrangement that ride on the workpiece in spaced relation about the nozzle for maximum sensitivity of vertical undulations in the workpiece. The piston and cylinder device is incorporated in a hydraulic system that includes a hydraulic pressure liquid and a hydraulic pressure liquid flow orienting or directional control valve of the mechanical servo type, for supporting the torch and moving same axially of its nozzle. The feeler or guide member and the servo valve are operably connected to the torch mounting head for translating the movement of the feeler member in its lost motion range, due to elevational changes in the workpiece, as the torch moves across the workpiece, into adjustment of the servo valve to maintain the torch nozzle at the desired predetermined spacing above the workpiece, as torch cutting proceeds.
REFERENCES:
patent: 2249413 (1941-07-01), Bechtle et al.
patent: 2766982 (1956-10-01), Bechtle et al.
patent: 3595545 (1971-07-01), Sitnichenko et al.
patent: 3980126 (1976-09-01), Eberle
patent: 4052040 (1977-10-01), Ogden
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