Special machine tool for internal thread low-frequency shock excitation cold extrusion processing

The invention discloses a special machine tool for internal thread low-frequency shock excitation cold extrusion processing. The special machine tool comprises a base (1) and a spindle (7). The special machine tool is characterized in that three upright columns (2) are obliquely mounted on the base (1), and are distributed in an equilateral triangle manner; a cross beam (3) is fixedly mounted at the upper ends of the three upright columns (2); a bottom plate (4) is vertically mounted on the cross beam (3); longitudinal guide rails (5) and a servo motor (8) are mounted on the bottom plate (4); a sliding plate (6) is mounted on the longitudinal guide rails (5); the servo motor (8) drives the sliding plate (6) to move up and down along the longitudinal guide rails (5) through a screw and nut mechanism; the spindle (7) is mounted on the sliding plate (6); a swinging arm (12) capable of allowing the spindle (7) to generate low-frequency rotation shock excitation is mounted at the upper end of the spindle (7); and