How does a cemented carbide drill up rock?

Cemented carbide drill break rock by weight on bit and impact load generated by their own rotation. In rock drilling, cemented carbide drill subjected to high frequency impact load, and by torsion, bending, tensile, compression and other composite stress, in the high-speed rotary collision environment subjected to rock, rock powder and mineral water and other working media wear and corrosion.

Most of the cone bits used at home and abroad are tricone bits. The characteristics of this bit are: axial pressure and impact load distribution range is large and uniform, and can make full use of effective space, smooth drilling. The size and shape of the carbide teeth used in the cone drill must be suitable for the characteristics of the rock, requiring good wear resistance, high strength, and not easy to fracture and break. The carbide teeth used in cone bits are mainly spherical teeth, conical ball teeth, wedge teeth, edge wedge teeth and flat top teeth for the wheel back and Java tip.

Generally, cone bits drilling very hard rock mainly use spherical teeth, bit pressure of 892~1339MPa, speed of 50~80r/min; The cone bit used for drilling hard and medium hard rock formations uses cone and ball teeth, the bit pressure is 714~1071MPa, and the rotating speed is 60~100r/min. The cone bits used in soft and medium soft rock formations use wedge teeth or side wedge teeth, the bit pressure is 535~803 mpa, and the speed is 80~120r/min.

Kehua Cutting Technology (Wuxi) Co., Ltd. is a supplier of high-quality cutting tools with advanced equipment, mainly producing and operating: milling cutter, standard milling cutter, cutting tool, cemented carbide drill, reamer and other products. At present, the company has 25 high-precision CNC grinding machines in Germany, and the introduction of advanced grinding technology from Japan, focusing on the design and development of high-quality tools, for domestic and foreign high-end mold industry, 3C, wind power, auto parts and other machining tools in the field of machining, reflecting a strong competitiveness, especially in the standard milling cutter, deep-hole drilling and high-hard field tool advantages.