Rock drilling tools and rock characteristics

For different rocks, there are different physical properties (such as density, humidity, magnetism, expansion, solubility, thermal conductivity, porosity, electrical conductivity, permeability) and different mechanical properties (such as strength, elasticity, hardness, blasting, drillability, abrasion, plasticity, brittleness, toughness, stability, robustness, stress wave transfer speed, etc.) that vary widely. It is required that when developing high-performance rock drilling tools, great attention should be paid to the characteristics of the rock and the production of rock drilling tools suitable for various rocks.

Selection of alloy tooth shape of cylindrical tooth products
Author/source: admin Published time: 2012-7-3 14:14:09 
The tooth shape of the alloy teeth used in column teeth products in rock drilling tool products is roughly divided into several shapes: hemispherical teeth, tapered teeth, parabolic teeth, and wedge-shaped teeth.

Under the condition that the impact work of the hydraulic rock drill is sufficient, the hemispherical teeth have a high energy utilization rate, good rock breaking effect, and the alloy teeth are strong and wear-resistant.

Taper teeth are easy to chisel into rocks, and the drilling speed is high. Taper teeth work more effectively when the impact work is insufficient (insufficient wind pressure of the wind-powered rock drill, changes in the performance of the hydraulic rock drill, etc.), but the abrasion resistance is poor.

Parabolic teeth are the shape of the crown between the tapered teeth and the hemispherical teeth, which are mainly produced and used by foreign alloy factories or joint ventures.

Wedge-shaped teeth are suitable for hard and abrasive rocks