The invention discloses a
machine tool turning tool rod capable of being quickly assembled and locked and a locking method, and belongs to the technical field of
numerical control lathe tools. The turning tool bar comprises a tool bar with a protruding
insertion block at the end, and positioning strips attached to the two sides of the
insertion block are arranged at the end, matched with the tool bar, of the
tool bit. Symmetrical limiting grooves are formed in the upper side face and the lower side face of the inserting block, and locking blocks are installed in the limiting grooves in a matched mode. Symmetrical positioning grooves are formed in the upper side face and the lower side face of the positioning strip. The side part of the locking block is correspondingly positioned in the positioning groove of the positioning strip; the rotating rod penetrates through the inserting block and the two locking blocks, and the two ends of the rotating rod are sleeved with pressing caps used for being pressed at the outer ends of the locking blocks. The
tool bit and the tool bar are matched in a push type
insertion mode, locking is synchronously driven through the single rotating rod, the disassembly and
assembly steps are simplified, and the
tool bit replacement efficiency is greatly improved; the tool bit and the tool bar can be automatically limited in the radial direction, the axial direction and the circumferential direction during pressing through the locking block, the limiting groove and the positioning groove which are matched through the conical surfaces, accurate centering in the three-dimensional direction is achieved, and the repeated installation accuracy of the tool bit is effectively guaranteed.