Drill bit

Abstract

The invention discloses a drill bit which comprises a drill handle, a drill body and a drill tip. The drill body is provided with a spiral scrap guide groove. A scrap guide portion is arranged on the bottom face of the spiral scrap guide groove and extends from the initial position of the spiral scrap guide groove to the terminal position of the spiral scrap guide groove along the spiral scrap guide groove. The left side of the scrap guide portion is close to the spiral center line of the spiral scrap guide groove. The right side of the scrap guide portion is attached to the right side wall of the spiral scrap guide groove. The scrap guide portion is composed of at least N flanges with different heights, and therefore the bottom face of the spiral scrap guide groove, the scrap guide portion and the outer surface of the drill body can form a gradually-heightened step shape, wherein N is larger than or equal to 2. The drill bit has the advantages that the scrap discharge speed is high, and the cooling performance of the drill tip is improved.

Description

technical field [0001] The invention relates to a drill bit. Background technique [0002] Drills are tools used to drill through holes or blind holes on solid materials and to ream existing holes; existing drills mainly include drill shanks, drill bodies, and drill tips. with helical chip guides, such as figure 1 Shown is a cross-sectional view of the spiral chip guide in the prior art, the cross-sectional view is perpendicular to the center line of the spiral chip guide, the angle between the right side wall 1 of the spiral chip guide and the bottom surface 2 of the spiral chip guide Usually 90°, the angle between the left side wall 3 of the spiral chip guide and the bottom surface 2 of the spiral chip guide is less than 90° so that the left side wall 3 of the spiral chip guide and the surface of the drill body form a direction toward the spiral chip guide sharp corners of the groove. Its working principle mainly uses numerical control equipment or other processing equi...

AI Technical Summary

Problems solved by technology

Since the debris will hit the right side wall of the spiral chip guide groove during the movement, it will generate a recoil force on the debris and affect the trajectory of the debris, which will greatly reduce the chip removal ability of the drill bit; and the operating speed of the drill bit is very high. High, so the drill tip part is prone to high temperature, if the chip removal capacity of the drill bit is reduced, the heat dissipation of the drill tip will undoubtedly be affected, thus greatly reducing the service life of the drill bit

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