Patent ID: 8690498
Filing Date: 2014-04-08
Classification: B23C,Y10T

Abstract:
1. A cutting machining method for performing circumferential groove machining on a work, rotatable about a work center axis, by advancing a cutting tool, which is attached to a rotating shaft extending, relative to the work center axis, to a radially inner side of the work from a radially outer side of the work, into the work in a depth direction of the work from a face of the work, the method comprising: determining a desired deviation δ in a direction along an x-axis between a trajectory of a cutting edge of the cutting tool within the work and an arc of a groove which is a machining target shape; acquiring, from the following equation, an inclination angle B based on the deviation δ, for arranging the trajectory to be a part of an ellipse of which a minor axis is oriented in the radial direction of the work and extends from a deepest point of the trajectory toward the work center axis; inclining the rotating shaft downward relative to the face of the work as the rotating shaft extends in a direction from the radially outer side toward the radially inner side at the acquired inclination angle B; and cutting the work as machining is performed until the cutting tool reaches a groove depth of a machining target while maintaining the inclination angle B so as to set the deviation δ for cutting depth t at an arbitrary point on the trajectory, wherein the x-axis denotes an axis situated along the intersection of a first plane defined by the face of the work and a second plane either defined by the work center axis and the deepest point of the trajectory or defined by the work center axis and an axis about which the rotating shaft rotates, wherein D denotes a diameter of the groove shape to be machined, a