PURPOSE: To provide a high safety roller burnishing device, which can yield a high precision cylindricity of the bore and with which the mandrel is prevented from breakage.
CONSTITUTION: The head part 7a of a tool unit body 7 is composed of tapered roller 1, a mandrel 2 having at the tip a taper opposite the taper of roller, and a guide cylinder 3 supporting a plurality of tapered rollers 1. The tip of the mandrel 2 is in contact with the tip of each tapered roller 1 at their circumferential side faces, and the dia. of the circumscribing circle of tapered roller 1 varies depending upon the vertical position of the mandrel 2, and the whole tool unit body 7 reciprocates between the processing position and non-processing position. The mandrel 2 is supported on the tool unit body 7 with possibility of moving vertically, and a driving means 12 to move mandrel 2 vertically is installed independently from a driving means for tool unit body 7. The tool unit body 7 is equipped with a pressure sensing means 13 which senses the load applied to its head part 7a.
HARA AKIRA
MORIMOTO MASATO
ASADA TAKAFUMI
KUBOTA SABURO
