CPC B24B 3/24 (2013.01) [B23B 51/02 (2013.01)] | 10 Claims |
1. A remanufacturing method of a drill, comprising:
providing a drill with a worn-out area, wherein the drill includes
a shank part; and
a flute part, disposed at one end of the shank part, wherein a chisel edge is formed on a front end of the flute part; a radius of any one of the cross section of the chisel edge is defined as a core thickness; a first blade and a second blade are respectively obliquely extended from two sides of the chisel edge toward the shank part; a first circumferential surface of the first blade and a second circumferential surface of the second blade are respectively helically extended along an outer diameter of the flute toward the shank part to form two helical cutting edges, a first debris-discharging groove and a second debris-discharging groove; the first blade has a first cutting edge; the first cutting edge and the first circumferential surface define the worn-out area;
aligning a grinding wheel to the worn-out area, including aligning a center of the chisel edge to a center of the grinding wheel, and aligning the first circumferential surface to a tangential edge of the grinding wheel; and
using the aligned grinding wheel to perform a cutting operation along the helical cutting edge or the first debris-discharging groove to grind and repair the worn-out area of the drill and restore a cutting ability of the drill.
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