Superalloy is a typical difficult-to-machine material. When cutting GH4169 by PCBN tools

it has large cutting forces

high cutting temperature

and difficult chip shape control. As a new processing technology

high pressure cooling can effectively reduce the cutting temperature and improve the breaking capacity of the chips. In this paper

the theoretical analysis of chip bending moment under high pressure cooling was carried out to obtain the theoretical model of chip bending moment. Secondly

based on the experimental study

the influences of different cutting parameters

cooling pressure and tool chamfering parameters on chip length

crimp radius and chip width were studied

which provide a reference for further promoting chip control.