Drill bit cutter arbor of interchangeable tool bit formula structure

The utility model relates to a drill bit cutter arbor of interchangeable tool bit formula structure. Still do not have a structural design equitable at present, the machining precision is high, and the tool bit can be given up, long service life's drill bit cutter arbor. The utility model discloses a cutter bar body, the last chip groove that is provided with of cutter bar body, its characteristics lie in: cutter bar body's front end is provided with the tool bit constant head tank, and this tool bit constant head tank and chip groove link to each other, the bottom of tool bit constant head tank is provided with the tool bit locating hole, cutter bar body's outer wall is provided with the tool bit fixed orifices, and this tool bit fixed orifices and tool bit locating hole intersect vertically, be provided with two supporting planes on the tool bit constant head tank, two supporting planes are all perpendicular with the bottom of tool bit constant head tank, and a supporting plane overlaps around 180 degrees rotatory backs on the cutter spindle line and another supporting plane. The utility model has the advantages of reasonable structure design, the machining precision is high, and the tool bit can be given up, long service life.