Drill pipe is an indispensable machine for mining machinery equipment. Drill pipe and drill bit are working devices of rock drill, which have great influence on the efficiency of rock drilling
Drill pipe, also known as steel, is generally made of carbon steel, the section is hollow hexagonal or prototype. The purpose of the hollowness is for the purpose of removing the gunhole powder.
The shape of the drill is chosen according to the hardness and composition of the rock. There are three kinds of common drill bits: single chisel, double chisel and cross. Double – chisel and cross – shaped drills can be used in general rock.
There are two ways to connect the drill pipe bit. One is the combination of drill pipe and drill bit (also known as the drill), it can only be used in the hardness of the rock is not large, so the fiber head is easy to wear. At this time should be the moton bit to be forged, commonly known as forging fiber or change drill. The other is a drill pipe connected to the bit by thread or taper, usually used in hard rock. The cutting edge of the bit is inlaid with carbide tool steel, commonly known as alloy bit. The advantage of this kind of drill is that the drill can be removed and replaced at any time after grinding, and the drill pipe can work without replacing, which improves the work efficiency, saves the steel, and reduces the cost of fiber repair.
The drill bit and drill pipe are used together in the drilling process. When drilling, use a shorter drill pipe and a larger drill bit to open the hole first, and then gradually add the drill pipe to use a smaller drill bit, so the drill bit should be large first then small, gradually reduce to the required aperture, the drill pipe first short then long, one by one to change the length to the required depth.
Post time: Apr-09-2020
