Three wing drill bit
A technology of three-wing bit and bit body, which is applied in the direction of bit, drilling equipment, earth-moving drilling, etc., can solve the problems of bit damage, affecting bit life, increasing cutting wing pressure, etc.
Inactive Publication Date: 2014-10-22
HUAINAN LISHENG IND & TRADE
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Problems solved by technology
[0002] Under normal circumstances, the angle between the cutting surface of the three-wing drill bit and the bit body is generally 15°. Generally, the larger the angle between the cutting surface of the drill bit and the bit body, the lower the cutting speed, and the general drill bit has only one circle of cutting wings. The pin-cutting ability of the drill bit can only rely on the cutting wing, which increases the pressure of the cutting wing, which easily causes damage to the drill bit and affects the life of the drill bit
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[0011] Below in conjunction with accompanying drawing, by describing embodiment, the present invention will be further described:
[0012] Such as figure 1 , 2 As shown, a three-wing drill bit of the present invention includes a drill body (1) and three first cutting wings 2 evenly distributed on the outer edge of the top surface of the drill body 1, and there are recesses 3 between the three first cutting wings 2. The cutting surfaces of the three first cutting wings 2 are all welded with diamond compacts 4, and the angle between the cutting surfaces of the three first cutting wings 2 and the top surface of the bit body 1 is 10°, and the middle part of the bit body 1 is evenly distributed. The second cutting wing 5, the diameter of the circumference where the flange of the second cutting wing 5 is located is greater than the diameter of the circumference where the flange of the first cutting wing 2 is located.
[0013] By adopting the above technical scheme, the angle betwe...
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The invention discloses a three wing drill bit. The three wing drill bit comprises a bit body and three first cutting wings evenly distributed on the outer edge of the top face of the bit body, wherein recesses are formed among the three first cutting wings, diamond composite sheets are welded on all cutting faces of the three first cutting wings, an included angle between the cutting face of each first cutting wing and the top face of the bit body is 10 degrees, a plurality of second cutting wings are evenly distributed in the middle of the bit body, and the diameter of a circle where wing edges of the second cutting wings are located is larger than the diameter of a circle where wing edges of the first cutting wings are located. According to the three wing drill bit, the included angle between the cutting face of each first cutting wing and the top face of the bit body is decreased, cutting speed of the three wing drill bit is improved, and simultaneously a circle of the second cutting wings are further arranged in the middle of the bit body, the second cutting wings assist the first cutting wings to cut mine walls, and cutting ability of the three wing drill bit is improved.
Description
technical field [0001] The invention relates to a mining drill bit, in particular to a three-wing drill bit. Background technique [0002] Under normal circumstances, the angle between the cutting surface of the three-wing drill bit and the bit body is generally 15°. Generally, the larger the angle between the cutting surface of the drill bit and the bit body, the lower the cutting speed, and the general drill bit has only one circle of cutting wings. The pin-cutting ability of the drill can only rely on the cutting wing, which increases the pressure on the cutting wing, which easily leads to damage to the drill bit and affects the life of the drill bit. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a three-wing drill bit, which not only has high cutting ability, but also has fast cutting speed and long service life. [0004] In order to achieve the above object, the present invention provides the following te...
Claims
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IPC IPC(8): E21B10/46E21B10/43
Inventor 孔祥九刘雷雨
Owner HUAINAN LISHENG IND & TRADE