Carbide ball drill bit is a "magic tool" used to grind rocks when mining and tunneling.
Carbide drill bits are equipment used in drilling projects. They break rocks by the impact load generated by drilling pressure and its own rotation. In rock drilling, the drill bit is subjected to high-frequency impact loads, and is subjected to multiple composite stresses such as torsion, bending, tension, and compression. It is subjected to wear and corrosion from working media such as rock, rock powder, and mineral water in an environment of high-speed rotation and collision.
Most of the roller bits used at home and abroad are three-roller bits. The characteristics of this drill bit are: the axial pressure and impact load distribution range is large and uniform, and it can make full use of the effective space and drill smoothly. The size and shape of the carbide teeth used in roller bits must be suitable for the characteristics of the rock, requiring good wear resistance, high strength, and not easy to break and break. The carbide teeth used in roller bits mainly include: spherical teeth, conical ball teeth, wedge teeth, side wedge teeth, and flat-top teeth for wheel backs and claw tips.
Generally, roller bits for drilling extremely hard rock formations mainly use spherical teeth, with a drilling pressure of 892~1339MPa and a rotation speed of 50~80r/min; roller bits for drilling hard and medium-hard rock formations use conical ball teeth, with a drilling pressure of 714~1071MPa and a rotation speed of 60~100r/min; roller bits for drilling soft and medium-soft rock formations use wedge teeth or side wedge teeth, with a drilling pressure of 535~803MPa and a rotation speed of 80~120r/min.
