Variable machine tool capable of multi-axis machining

A variable machine tool capable of multi-axis machining, comprising:

• a base frame;
• a first rotating frame disposed on the base frame rotating about a first axis and connected to a first sliding member sliding along an inner circumference of the first rotating frame;
• a second rotating frame disposed inside the first rotating frame to rotate about a second axis perpendicular to the first axis, and connected to a second sliding member sliding along an inner circumference of the second rotating frame;
• and
• a spindle,
• wherein the position and posture displacement of the spindle is adjusted when the first sliding member and the second sliding member slide by interworking with rotation of the first rotating frame and the second rotating frame, the spindle being installed in the machine tool so as to pass through the first sliding member and the second sliding member,
• wherein the spindle is fixedly coupled to the first sliding member, and the spindle is rotatably coupled to the second sliding member,
• wherein the first and second sliding members are spaced apart from each other, and
• wherein the base frame comprises a body portion comprising a ring-shaped upper body disposed at an interval with the first rotating frame, and a hemispherical lower body protruding from a lower side of the upper body,
• a pair of first driving motors for rotating the first rotating frame is arranged in the first axis direction,
• a pair of second driving motors for rotating the second rotating frame is arranged in the second direction,
• the upper body has four holes, and
• the pair of first driving motors and the pair of second driving motors are inserted in the four holes respectively and mounted on the upper body thereby.