Top hammer bits, also known as large stone drill bits, are commonly used tools in stone mining and construction industries. Its specifications can be distinguished based on factors such as diameter, length, and head shape. Generally speaking, the diameter range of the top hammer drill bit ranges from 20mm to 100mm, and the length is generally between 400mm and 1200mm. The shape of the drill head can be divided into various types, such as conical, curved, and flat. During use, different specifications of top hammer drill bits need to be selected according to the specific drilling situation.
The working principle of a top hammer drill bit is to use the shock wave generated by high-pressure air compression to transmit the impact force to the drill rod and drill bit, allowing the drill bit to quickly hit the rock and carry out drilling operations. Specifically, when the top hammer is subjected to air pressure, its internal piston moves downward, compressing air and injecting compressed gas into the hammer. When the piston reaches the top, by shifting the position of the drill pipe, the gas in the hammer is released, generating a shock wave that hits the drill bit, causing it to move forward while rotating for drilling operations.
The top hammer drilling rig is mainly composed of a drill arm, a drill rod propulsion beam, a rod changer, a rock drill, a hydraulic control system, a fuel system, a chassis, a cab, and other structures. It is generally used in rock mines that require drilling and blasting, as well as in areas such as dividing stones and excavating building foundations.
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