Rock drill bits and rock characteristics

Different rocks possess vastly different physical properties (such as density, humidity, magnetism, expansibility, solubility, thermal conductivity, porosity, electrical conductivity, permeability) and mechanical properties (such as strength, elasticity, hardness, explosiveness, drillability, abrasiveness, plasticity, brittleness, toughness, stability, firmness, stress wave transmission speed, etc.). When developing high-performance rock drills, it is crucial to consider the characteristics of the rock and produce rock drills suitable for various types of rock.

Selection of Alloy Tooth Shapes for Column Teeth Products
Author/Source: admin Published Time: 2012-7-3 14:14:09
The alloy teeth used in column tooth products in rock drilling tools generally come in several shapes: hemispherical teeth, conical teeth, parabolic teeth, and wedge-shaped teeth.

Under sufficient impact energy from hydraulic rock drills, hemispherical teeth exhibit high energy utilization, good rock breaking effect, and robust wear resistance.

Conical teeth easily penetrate rocks, resulting in higher drilling speeds. They are more effective when impact energy is insufficient (e.g., insufficient air pressure in pneumatic rock drills or performance variations in hydraulic rock drills), but they have poor abrasion resistance.

Parabolic teeth represent a crown shape between conical and hemispherical teeth, primarily produced and used by foreign or joint-venture alloy manufacturers.

Wedge-shaped teeth are suitable for hard and highly abrasive rocks