Three-dimensional engraving and milling machine

The utility model discloses a three-dimensional engraving and milling machine, which comprises a worktable and a cross beam, wherein the worktable is horizontally and fixedly arranged; the cross beam can move horizontally and longitudinally; the lateral surface of the cross beam is movably provided with a tool frame with a plurality of milling heads. The three-dimensional engraving and milling machine is characterized in that the cross beam has a gantry framework structure; the lower part of the cross beam is connected with a screw nut transmission pair; a nut is fixedly arranged on a lower beam of the cross beam; a lead screw is arranged on the worktable along the horizontal longitudinal direction; and the lead screw is in transmission connection with a motor. The three-dimensional engraving and milling machine has simple structure. The moving precision of the cross beam is high. The operation stability of the tailstock cross beam is high. The tailstock cross beam can realize convenient and rapid locking fixing.