DEVICE FOR MAKING HOLLOW CYLINDRICAL ARTICLES OF STONE BLOCK ON SPINDLE MACHINE TOOL Russian patent published in 1996 - IPC

FIELD: stone-processing engineering. SUBSTANCE: device has spindle machine tool 1, housing 4 and core barrels 6 and 7 with diamond crowns located concentrically on housing one in another. Working surfaces of crowns are disposed in one plane. Upper ends of barrels are connected by binding assembly. Circular centering guide 10 with slots for passing the washing agent is placed in interbarrel space. The device is equipped with container 12 for stone block 14 and detachable centering guide 11 in the form of a rolling bearing fixed on container face end for interacting with external surface of exterior barrel. The binding assembly can be made as cone clutch with wedges, thickening and through hole for working pipe 3. The clutch is rigidly connected with upper end of exterior circular pipe 6. EFFECT: facilitated manufacture. 2 cl, 7 dwg