Tungsten Carbide Buttons Used for DTH Drill Mechanism (1/2)

DTH drill bit is a kind of high-performance tool, which is also the one of the most widely used in excavation, rock drilling work. It is suitable for drilling hard, hard and abrasive rock formations, relying on high impact energy have a great impact energy of rock cracking. And it has so many advantages, such as high efficiency of drilling, high impact energy, has shear crash and longer service life; especially its driving force is based on airflow, which sufficient airflow can take away the rock debris from the bottom to improve the efficiency of drilling and reduce the abrasion of tungsten carbide buttons. As for the choice of tungsten carbide button becomes essential, to be considered in accordance with DTH drill diameter as well as the impact on other aspects of work, number and position of the buttons determines whether a reasonable share DTH drill the impact on power.

Theoretically, tungsten carbide buttons used for DTH drill uses rotary impact for rock drilling, It has short impacting time, the buttons in an instant contact with the rock produces a huge impact and brittle rocks internal stress concentration, under the action of impact force generated volume very easily broken so that the efficiency of DTH drill has been improved. Furthermore, tungsten carbide DTH drill buttons while also impact rock rocks rotary cutting button and drill the ball pure axial pressure is significantly smaller than rotary cutting bit, the button wear is also reduced a lot , thereby improving the wear resistance and grinding of carbide DTH drill buttons, extended service life.

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