A cryogenic gas stream of supersonic generating indexable milling the cooled

The present invention discloses a cryogenic produce supersonic gas stream within the cold indexable milling cutter, comprising a shank, the tip, and divergent nozzle contraction indexable insert, the head and shank connected to the tip the two central symmetry indexable insert is fixed, the upper end of the tip may be provided with internal cooling hole and the position of the blade can be fitted into and connected to the divergent nozzle contraction internal cooling hole; two, respectively inner cooling hole shunt connection; central shank provided with cooling holes, the cooling holes are connected sprue, sprue through the inside handle, communicate with two branch passages; in the nozzle of the present invention can be obtained constantly accelerating airflow supersonic flow, and it will lead to temperature drastically reduced, so as to obtain supersonic flow low temperature for cryogenic cooling of the cutting process.