The Wear Experiment And Cutting Simulation Of Impregnated Brazed Diamond Bit

Impregnated brazed diamond bits are currently widely observed in geological exploration. In this paper, based on the experimental study of the bit wear rule and the protrusion and failure mode of diamond grits, the cutting process of one single diamond grit on rocks is simulated and analyzed by ANSYS/LS_DYNA.Under the same working condition, different kinds of diamond bits are tested in wear experiments. The first-hand data show certain rules in the wear of matrix and the shedding of diamond grits.On the previous research, a simplified model of one single diamond grit cutting on rocks is established. In ANSYS/LS_DYNA, the cutting process is simulated under different conditions including rock types, cutting speed and height of protrusion. Force analysis is carried on systematically.Finally, according to the expriment of bits and the results of simulations in this paper, it is obtained as blow. Brazed impregnated diamond bits has high diamond exposure, fast drilling speed and long service life, because the interfaces between the brazing materials and the diamond grits,on which chemical and metallurgy reaction layers are formed in the process. The Micro-drilling equipment can serve as a testing devise in some related research. Searching for the cause of damdaged diamond grits in the test, it is simulated the cutting process across the rock fracture and joint surface, and found that the stress and the curves amplitude of diamond are related with the cutting speeds and the rock materials.