The utility model discloses a three-tip and two-blade-shaped composite sheet for a
coring bit. The three-tip and two-blade-shaped composite sheet comprises a
coring bit body, a mounting seat is arranged on one side of the
coring bit body, and a positioning groove is formed in one side of the mounting seat; wherein the other side of the mounting seat is provided with a composite sheet base layer, and the other side of the composite sheet base layer is provided with a composite sheet
surface layer; wherein one side of the composite sheet
surface layer is provided with the composite sheet
cutting edge, one side of the composite sheet
cutting edge is provided with the composite sheet tip end, and the composite sheet tip end is stressed to carry out crushing operation by arranging the composite sheet
cutting edge, the composite sheet tip end and the
chip groove on one side of the composite sheet
surface layer. Smashed stone
slag is discharged through the
peripheral chip discharging grooves, the purpose of improving the coring and crushing efficiency of the
drill bit is achieved, by arranging the positioning groove, the positioning block and the installation base, the situation that a composite piece cutting edge and a composite piece tip on one side of a composite piece surface layer deviate in the
welding process is avoided, and
drill bit coring
welding is more convenient and faster.