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2022
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06
How to make a high-performance, durable DTH drill bit?
DTH drill bit is a drill bit used to drill holes. Generally, it has side teeth and middle teeth. The middle teeth are used for diving, and the side teeth are used to ensure the aperture. When in use, because the force on the side teeth is perpendicular to its length, the side teeth are easy to break under continuous use, causing the drill bit to be scrapped.
DTH BITIt is a drill bit used for drilling holes. Generally, it has side teeth and middle teeth. The middle teeth are used for diving, and the side teeth are used to ensure the aperture. When in use, because the force on the side teeth is perpendicular to its length, Under continuous use, the side teeth are easy to break, causing the drill to be scrapped. At present, DTH bits are widely used in open and underground mines, quarries, tunnel engineering, hydropower engineering, water well drilling, mineral exploration, subway excavation, side pile support, various earthwork mining and other construction sites. When the existing down-the-hole drill bit is used on highly abrasive rock, the carbide column teeth of the down-the-hole drill bit are seriously worn or fall off and break prematurely, resulting in short life and low efficiency of the down-the-hole drill bit, which seriously affects the construction quality and progress of the project, and also causes a lot of waste of manpower, material resources and raw materials. Therefore, it is necessary to design a down-the-hole drill bit that can protect the side teeth to make the down-the-hole drill bit more durable.
Those skilled in the art have provided a durable down-the-hole drill bit to solve the problems mentioned in the above background. In order to achieve the above object, the DTH drill bit adopts the following technical scheme: a durable DTH drill bit includes a drill bit and a drill tail. The drill bit and the drill tail are both cylindrical structures. The diameter of the drill bit is larger than the diameter of the drill tail. The drill tail is connected to the center of the bottom of the drill bit. The top surface of the drill bit is provided with multiple rows of vertically arranged side teeth on one side and multiple rows of vertically arranged rectangular blocks on the other side. The side wall of the drill of the down-the-hole drill has five rows of vertical side teeth on one side and five rows of vertical rectangular blocks on the other side. TheDTH BITEach row of side tooth groups includes five side teeth vertically distributed at equal intervals, each row of rectangular block groups includes two rectangular blocks spaced from top to bottom, and five side teeth in every two adjacent rows of side tooth groups are staggered with each other. The protruding heights of the rectangular blocks in the five-row rectangular block group on the drill face increase row by row, and the protruding heights of the rectangular blocks with higher protruding heights are the same as the protruding heights of the side teeth on the drill face. The middle and side teeth of the durable DTH drill are alloy teeth, and the rectangular block is alloy block. The bottom of the drill bit is fixed with a rounded table-shaped drainage block, and there is a cylindrical hole in the middle of the drainage block for the drill tail to pass through.
Compared with the existing technology, the above.DTH BITThe beneficial effect is: when the down-the-hole drill is reaming, the sharp side teeth are used to line the hole wall along the drill ring, so that the sand or rock around the hole wall is planed loose by the side teeth, and then the hole wall is planed with a thick rectangular block The loose sand or rock is leveled to achieve the effect of reaming. Compared with ordinary down-the-hole drilling rig, the sand production of the hole wall needs to rely entirely on the side teeth. The rectangular block on the drill head of the present invention provides strong assistance for the side teeth, greatly reduces the working strength of the side teeth, makes the side teeth not easy to break, and the down-the-hole drill bit is more durable.
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