Drill bit
A drill bit and clamping rod technology, which is used in repairing drills, drilling tool accessories, drilling/drilling equipment, etc., can solve problems such as damage to the drill bit, increased cost, high temperature of the drill bit, etc., and achieves simple structure, cost saving, and reduced processing. effect of difficulty
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[0011] The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. like figure 1 , 2 As shown, the drill bit in the preferred embodiment of the present invention includes a clamping rod 1, which is cylindrical and has a central axis 2, a clamping plane 3 is provided on the outer circumference side, and three helical rods are welded at the end. The gear cutting arm 4, the outer side of the gear cutting arm 4 is surrounded by a central axis 5 coincident with the central axis 2, the end of the gear cutting arm 4 is provided with a cutting tooth 6, the cutting tooth 6 is hard alloy, welded on the cutting gear arm 4, for the convenience of drilling chips The discharge, the front tooth surface 7 and the rear tooth surface 8 of the cutting arm 4 and any tangent plane perpendicular to the central axis 5 form a front tooth line 9 and a rear tooth line 10, and the front tooth line 9 and the rear tooth line 1...
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