Patent ID: 8402655

Claim:
A method for processing an orifice, comprising: a first step of selecting any one of a plurality of punches which is disposed so as to have an axis in a horizontal direction; a second step of, following the first step, positioning the punch in a first axis direction that is perpendicular to a vertical direction and a punch axis direction, and positioning the punch in the vertical direction; a third step of positioning a work held in a chuck by oscillating and rotating the work about a second axis in the vertical direction and a third axis in the horizontal direction oscillatable about the second axis; a fourth step of, following the second and third steps, pressing to process the work by moving the punch straightforwardly in the punch axis direction to form an orifice in the work; a fifth step of, following the fourth step, removing the punch from the work by moving the punch straightforwardly in a direction opposite the straightforward direction in the fourth step; and returning to the first step with the work held in the chuck after performance of steps of from the first through fifth steps, selecting a punch that is different from the punch selected in the first step, and performing the second through fifth steps to thereby process holes including the orifice and a recessed portion disposed at an outlet opening portion of the orifice.