MACHINE FOR BORING OF BLAST-FURNACE TAP HOLE AND METHOD OF BORING BAR REMOVAL FROM SUCH MACHINE Russian patent published in 2015 - IPC C21B7/12 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, particularly, to machine for boring of the blast-furnace tap hole. The machine contains frame with movable installed on it drilling and impact gear containing receiving device of the boring bar for its connection. On the frame a clamping device of the holding device is located, it is intended to hold the boring bar relatively to the receiving device. The holding device contains drive made with possibility of the holding device rotation, at that the holding device contains paws that in opened position around the boring bar are arranged from each other at distance ensuring possibility of the boring bar removal from the receiving device, in position around the boring bar the paws are at distance ensuring possibility of the boring bar directing by the paws, and in clamped position the paws are arranged around the boring bar with possibility to ensure forced and/or geometric securing of the boring bar between the paws.

EFFECT: invention ensures simple removal from the receiving device of the deformed ends of the boring bar without time consumption increasing.

13 cl, 9 dwg