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US 2024/0082929 A1Published application
Twist drill with multi-step drill point
AssigneeDanyang Kaiyiyuan Tools Co., Ltd.
InventorKaibin WANG
Life of this patent
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Abstract
A twist drill with a multi-step drill point includes a shank and a cutting portion. The cutting portion is provided with a spiral flute and a body clearance. A tip of the cutting portion is provided with a chisel edge and a cutting edge. A flank face connected with the cutting edge is provided with a stepped groove which divides the cutting edge into several sections. A pitch of the stepped groove gradually decreases along a direction from the tip of the cutting portion to the shank.
Claims3
A twist drill with a multi-step drill point, comprising:
- a shank;
- and
- a cutting portion;
- wherein the cutting portion is provided with a spiral flute and a body clearance;
- a tip of the cutting portion is provided with a chisel edge and a cutting edge, and a flank face connected with the cutting edge is provided with a stepped groove;
- the stepped groove is configured to divide the cutting edge into several sections;
- and a pitch of the stepped groove is configured to decrease along a direction from the tip of the cutting portion to the shank.
4 more elements
Dependencies are inferred from the claim text.