DEVICE TO MACHINE CIRCULAR OPENINGS AND PIECES Russian patent published in 1995 - IPC

FIELD: materials machining. SUBSTANCE: device to machine circular openings and pieces represents casing 1 with reduction gear 2 with cutting through tool put on the shaft of which. The tool is covered with housing 16. The tool is made is the form of disk 4 provided with cutters 8 installed on its periphery perpendicular to tool axis. The cutters are revolving and pointed on their ends. Moreover the cutters have openings with balls 12 positioned in holders and installed in the openings. The openings have also rolls 14 on axes installed in them. The rolls are in contact with slideways 19 and 20 installed in housing 1 on both sides of the tool and providing slope of the cutters in the process of tool rotation through a required angle. Slideways 19 and 20 may be made in the form of plane flexible rings, becoming bent upon required shape by screws, installed in housing 1. EFFECT: cutting through openings. 7 dwg, 2 tbl