| 主权项 |
1. A method of forming, by wire electric discharging machining, an ultra-hard material that is fixed to a cutting tool into a cutting blade according to a machining program executed by a wire electric discharge machine performing a taper machining,wherein
the wire electric discharge machine comprises:
upper and lower wire guides,a wire electrode,the cutting tool movable relatively, in two mutually orthogonal axis directions, with respect to the wire electrode that is stretched by the upper wire guide and the lower wire guide,a touch sensor,a rotating shaft to which the cutting tool is removably mounted, anda controller, the method comprising: generating a measurement program for setting, along a machining path instructed by the machining program, measurement points at which contact between a face of the ultra-hard material and a probe end section of the touch sensor is detected at a rotation center height of the rotating shaft, said measurement points including
an origin of a block of the machining path,an endpoint of the block of the machining path, anda point among a plurality of divisional positions between the origin and the endpoint;whereineach of the measurement points is calculated by separating a path that is offset by a machining margin, from the machining path instructed by the machining program,the machining path has a plurality of blocks including said block, andthe measurement points among the plurality of divisional positions are obtained by automatically calculating, by the controller, points resulting from dividing, by an arbitrary number of divisions, an expanse from an endpoint coordinate of each of the blocks in the machining path instructed by the machining program up to an endpoint coordinate of a previous block among the plurality of blocks in the machining path, for each of the measurement points,
positioning the probe end section of the touch sensor at the measurement point on the basis of the generated measurement program,causing the rotating shaft, to which the cutting tool is mounted, to rotate in a direction in which the face of the ultra-hard material being fixed to the cutting tool comes into contact with the probe end section of the touch sensor, said face defining a tool rake face,reading rotating shaft coordinate information of the rotating shaft for which the face of the ultra-hard material at the measurement point is at the rotation center height of the rotating shaft, on the basis of a detection signal obtained from the touch sensor when the face of the ultra-hard material comes into contact with the probe end section of the touch sensor, andstoring (i) path coordinate position information, being coordinate data in the two orthogonal axes at the measurement point, as well as (ii) the read rotating shaft coordinate information; regenerating a machining program from the path coordinate position information and the rotating shaft coordinate information that are stored for each of the measurement points; and forming a cutting blade through wire electric discharge machining of the ultra-hard material by the wire electrode that is stretched by the upper and lower wire guides, according to the regenerated machining program. |
