Multi-spindle machining machine with tool changing mechanism

A machining machine comprising:

• a base;
• a carrier including a seat, a rotary shaft, and a fixing holder, the seat being configured to move relative to the base in a vertical direction, and the vertical direction is a Z axis, the rotary shaft being fixed on the seat so as to project from the seat laterally with respect to the Z-axis along an A-axis, and the rotary shaft driving the fixing holder to rotate about the A-axis, the fixing holder being coupled to an end portion of the rotary shaft to fix a work piece on the fixing holder for rotation with the rotary shaft;
• a tool changing mechanism including a mount and a monitor, the mount being mounted to the rotary shaft so as to rotate with the rotary shaft, and the mount including a plurality of slots linearly arrayed on each of an upper side and a lower side of the mount such that each slot receives a respective tool, the monitor being fixed on the seat to measure a length of the tool clamped on a tool driving spindle;
• a working head moving above the carrier and the tool changing mechanism, the working head configured to move in two horizontal directions, and the horizontal directions being an X axis and a Y axis, and the working head including the tool driving spindle mounted on a lower end thereof to rotate a tool about an axis in order to machine a workpiece mounted on the fixing holder, and the lower end of the driving spindle configured to engage and disengage one of the tools of the tool changing mechanism to exchange a tool between the tool driving spindle and the mount;
• wherein each of the slots of the mount receives a respective fixture module, each fixture module including a respective retaining sheath and a respective O-ring, wherein the respective retaining sheath is fixed in the respective slot and has a respective aperture defined therein to receive a respective one of the tools, and each retaining sheath includes a plurality of cutouts and an indentation, each cutout communicating with the aperture of the respective retaining sheath, and a respective clamping paw being defined between a pair of the cutouts to define a plurality of clamping paws per retaining sheath, and the respective O-ring of the respective fixture module being received in the indentation of the respective retaining sheath so as to form an elastic force such that the plurality of clamping paws deform so as to clamp the respective tool being received in the respective aperture.