Stud gear with cutting edge and drill thereof

Abstract

The invention discloses a stud gear with a cutting edge and a drill thereof, and is suitable for manufacturing a stud gear with a cutting edge and the drill of the stud gear which are used for drilling operations for getting water, mining minerals, petroleum and natural gas, geological drilling operation and the like, as well as rock drilling operations of various civil constructions, wherein the stud gear and the drill thereof can be a roller bit working in a rolling manner, a hole bit and or stud gear bore bit working in a spinning manner. The stud gear comprises a cutting edge which is additional arranged at the side part, the original rotation body structure of the stud gear head is basically maintained, so that the original impact resistance strength is maintained. After the drill disclosed by the invention is adopted, the shortage that the spherical face of the traditional stud gear is easy to wear when used for scraping rocks is basically overcome.

Description

technical field [0001] The invention relates to a column tooth with a cutting edge and a drill bit thereof, which are suitable for manufacturing drill bits for drilling operations such as water intake, mining, oil and natural gas drilling and exploitation, geological drilling, and rock drilling for various civil constructions. Column teeth with cutting edges are used on the drill. Drill bits include roller cone bits that work in the rolling mode, down-the-hole drill bits and column-tooth drill bits that work in the rotary punching mode. Background technique [0002] The teeth used on the traditional down-the-hole drill bits, column tooth bits and roller cone bits are divided according to the geometry of the head: hemispherical column teeth, conical column teeth, parabolic column teeth, etc. of the rotating body, and those of the non-rotating body Such as wedge-shaped column teeth, spoon-shaped column teeth, etc. Among them, the deformed column tooth is formed by removing p...

AI Technical Summary

Problems solved by technology

The column tooth with a spherical head is theoretically not suitable for cutting rocks at all, especially when its ball head cuts rocks in a tangential motion on the rocks, it exerts a great force on the rocks in the direction perpendicular to the shearing motion. The pressure greatly increases the shear strength of the rock, which not only increases the cutting resistance and friction power consumption, consumes more mechanical power of the drilling rig, but also accelerates the wear rate of the column teeth

At the same time, the column teeth on the existing down-the-hole drill bits are also installed perpendicular to the rotating surface of the drill head, because the fastening of the side teeth must first be guaranteed, so it is difficult to arrange slag discharge at the front of the column teeth that play a cutting role. The groove or the space for slag discharge or temporary storage of stone slag, so the steel matrix here is easily worn by the accumulated stone slag when the drill bit rotates, forming a defect in the edge tooth fastening ring, resulting in early loss of the edge tooth

In addition, after the part of the edge tooth side that acts as a cutting tool on the hole wall is worn, the diameter of the drilled hole is reduced, resulting in difficulty in slag removal, which reduces the drilling speed and aggravates the wear of the steel matrix of the drill bit, further accelerating the failure of the drill bit

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