Flute forming method of single-blade drill

Abstract

The invention relates to a flute forming method of a single-blade drill. The drill is provided with a drill blade part, wherein one end of the drill blade part is connected with a knife handle part; the part, far away from a dead point at the terminal of the knife handle part, of the drill blade part extends slantly to form a cutting blade; a flue is ground on the surface of the drill blade part in a twice-grinding manner at one side of the cutting blade, and the flute is formed by winding around one side of the cutting blade toward the knife handle part, thus the problems that quenching is caused owning to temperature rise and deflection caused by overhigh stress when the flute is ground on the drill blade part can be avoided.

Description

technical field [0001] The invention relates to a method for forming a chip relief groove of a single-edged drill bit, in particular to a manufacturing method for grinding a chip relief groove on the surface of the drill bit of the drill bit by means of secondary grinding. Background technique [0002] Drills are commonly used tools in general drilling engineering. Common drills are roughly divided into single-edged drills, double-edged drills, or even three-to-four-edged drills. The main difference lies in the number of cutting edges formed by the tip of the drill bit. Since the single-edged drill has only one cutting edge, it is easy to control the length of the cutting edge, that is, the diameter of the drill when drilling. In contrast, due to the large number of cutting edges of the double-edged drill or the four-edged drill, It is not easy to control the equal length of each cutting edge, and it is easy to make the drill bit expand the hole when drilling. However, when ...

AI Technical Summary

Problems solved by technology

[0002] Drills are commonly used tools in general drilling engineering. Common drills are roughly divided into single-edged drills, double-edged drills, or even three-to-four-edged drills. The main difference lies in the number of cutting edges formed by the tip of the drill. Since the single-edged drill has only one cutting edge, it is easy to control the length of the cutting edge, that is, the diameter of the drill when drilling. In contrast, due to the large number of cutting edges of the double-edged drill or the four-edged drill, It is not easy to control the equal length of each cutting edge, and it is easy to make the drill bit expand the hole when drilling. However, when the drill bit is drilling, the cutting edge will cut the surface of the substrate, and the substrate will be cut. Chips produced by edge cutting will be guided by the flute provided on one side of the cutting edge to the place where the drill edge connects to the shank and discharged. There will be two flutes or four flutes on the four-edged drill or four-edged drill, but the single-edged drill will only have a single flute, so under the same drilling diameter, the single-edged drill produces The debris cannot be completely discharged from the flute, which is likely to cause the problem of chip jamming. However, because the single-edged drill bit has excellent performance in drilling accuracy, it is suitable for drilling operations that require high-precision apertures (such as multiple single-edged drill bit is the tool of choice

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