In the construction process of open-pit and underground mines, quarries, hydropower projects, water well drilling, mineral exploration, rock anchoring with steel cables, geothermal excavation, and side pile support of subway projects, it is necessary to use various drill bits for rock drilling. During the drilling, the carbide inserts rock drill bit will gradually wear, resulting in a gradual increase in the drilling resistance and a weakening of rock crushing effect, resulting in a gradual decrease in the footage efficiency and affecting the construction progress. Therefore, in most rock drilling projects, when the carbide inserts is worn to a certain extent, people will scrap the drill bit and replace it with a new one, and basically do not grind carbide button, causing a lot of waste.

Among them, the annual amount of button bits is large and has broad market prospects. Therefore, button bit grinding machine was born.

1. What is button bit grinding machine?

Button bit grinding machine is a special equipment for grinding button carbide embedded in various DTH and top hammer button bits. It has the advantages of a good grinding effect, high efficiency, and low grinding cost. A drill bit can be ground 2-3 times.

2. Types of button bit grinding machines

The different structures and spindles of button bit grinding machines mainly include the following four types.

①    Hand-held pneumatic grinding machine

Equipment is simple and cheap, powered by compressed air, but the grinding quality is unstable and depends entirely on the operator’s technical level.

②   Bench-type pneumatic grinding machine

It’s structure is relatively simple, equipment has manual angle adjustment and clamping mechanism to achieve semi-automatic grinding, which does not require high technical level of operators.

③   Rocker arm type pneumatic grinding machine

Mechanical arm structure is easy to operate. Equipment has good rigidity, and angle adjustment adopts pneumatic method, which saves time and effort, and it can clamp large-diameter drill bits for grinding. Equipment has a high degree of automation, and the technical level of the operators is low.

④   Rocker Arm electric grinding machine

The main shaft is an electric spindle, with high grinding efficiency and low noise. Angle adjustment adopts pneumatic method, which saves time and effort. Designed special fixture can clamp up to 10 drill bits at a time for grinding, with high efficiency and a high degree of equipment automation, the requirements for the operator’s technical level are low.

Application of button bit grinding machine greatly saves the waste of button bit. Construction party repairs and grinds button bit in time, which can not only greatly extend the service life of rock drill bit, but also keep drilling efficiency stable and construction period guaranteed, thereby significantly reducing construction cost.