Drill Bit with High Performance for Chip Removal
AssigneeJiangsu Tiangong Tools Co., Ltd.
InventorXiaokun Zhu
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Abstract
A drill bit with high performance for chip removal. The drill bit comprises a cutting tip and a drill body. The cutting tip comprises a chisel edge, a back edge, a cutting edge groove and a rear rib. The cutting edge groove is a circular groove having meniscus shape. A primary cutting surface interposed between the cutting edge groove and the back edge has a trapezoidal or triangular shape. Grinding the rear rib forms a quadratic rear plane. The quadratic rear plane crossing with the chisel edge and the cutting edge groove defines a cutting edge groove plane. The drill bit has three tips and seven cutting edges. A drill bit according to the present invention provides a significant improvement in cutting performance over known twist drill bit in the prior art.
Claims2
A drill bit with high performance for chip removal, comprising a drill tip and a drill body;
- said drill tip, including the drill core, back edge, tooth and back groove edge, wherein said tooth is a crescent circular groove;
- there is a trapezoidal or triangle main cutting edge face between said tooth and said back edge;
- said back groove edge is processed into the plane secondary back face;
- said secondary back face intersects said tooth and drill core into the tooth face;
- said secondary back face intersects said tooth plane.
Dependencies are inferred from the claim text.