Medical miniature abrasive drilling instrument with positive rake angle micro-blade spiral texture

The invention discloses a medical miniature abrasive drilling instrument with a positive rake angle micro-blade spiral texture. The instrument comprises a stainless steel cutter bar and a PCD polycrystalline diamond abrasive drilling bit welded to the cutter bar. The surface of the diamond abrasive drilling bit is characterized by comprising a positive rake angle micro-blade, a spiral chip removal groove formed by spirally and orderly arranging the micro-blade, six miniature cutting blades at the bottom of the abrasive drilling bit and an arc-shaped chip removal groove. Compared with traditional negative rake angle grinding, the positive rake angle micro-blade participates in grinding, the positive pressure is remarkably reduced, and the problem that adhesive bone chips are embedded in the surface of the abrasive drilling bit and are not prone to falling off is effectively solved. The six miniature cutting blades at the bottom of the abrasive drilling bit reduce the cutting force and improve the machining eff