Patent ID: 7309197
Filing Date: 2007-12-18
Classification: B23F,Y10T

Abstract:
1. An internal gear shaving machine in which a shaving cutter is engaged with an internal gear held by a workpiece chuck at a crossed axes angle and tooth flanks of the internal gear are subjected to final machining while at least one of the shaving cutter and workpiece chuck is rotationally driven, at least one of the workpiece chuck and shaving cutter being supported movably toward and away from each other in a vertical orientation with the workpiece chuck higher than the shaving cutter and at least one of the workpiece chuck and shaving cutter supported movably in the horizontal direction relative to each other, and the workpiece chuck being so constructed that it holds the outer circumferential surface of the internal gear with the axis of rotation of the internal gear oriented in an up-down direction so that shavings produced during processing by the shaving cutter can fall downwardly from the internal gear, teeth of the shaving cutter and teeth of the internal gear being indexed to a predetermined phase for the machining, and wherein during a workpiece exchange, the workpiece chuck is movable at least vertically to effect the exchange.