The invention provides a drilling method for a numerically controlled milling
machine with a tiltable spindle. First, clamp the workpiece to be drilled on the
machine tool; tilt the
machine tool spindle around the Y-axis of the
machine tool coordinate
system according to the
processing requirements, and use a sine gauge to verify the tilt angle, so that the
machine tool spindle is perpendicular to the surface to be drilled; secondly, clamp the
drill bit on the
machine tool spindle, And control the rapid feed of the
drill bit, so that the
drill tip moves to the position of the hole top, and determine the coordinates (x0, y0, z0) of the hole top in the
machining coordinate
system; take (x0, y0, z0) as the coordinates of the first drilling start point , according to the determination of the coordinates (x1, y1, z1) of the end point of one drilling, where l is the moving distance of the
drill bit along the drilling direction; the
drill bit is retracted after one drilling, and then the end point coordinates of the previous drilling are used as the new The coordinates of the starting point of a drilling cycle are carried out until the hole depth meets the
processing requirements. The method realizes the drilling
processing task that cannot be completed by the ordinary
numerical control milling machine under the working condition with poor openness, and at the same time, the required cost is also greatly reduced compared with the five-coordinate
machining center.