Drill point structure with identical cutting grooves

Drill point structure with identical cutting grooves

  • CN 202,447,723 U
  • Filed: 01/10/2012
  • Issued: 09/26/2012
  • Est. Priority Date: 01/10/2012
  • Status: Active Grant
First Claim
Patent Images

1. the drill point structure with repetition dissected valley is characterized in that, said drill point structure with repetition dissected valley comprises:

  • One drill shank;

    AndOne drill lip portion;

    Connect this drill shank;

    This drill lip portion is provided with at least one first smear metal discharge gutter by an apex point end spiral, and this first smear metal discharge gutter comprises one first helix angle, and this first smear metal discharge gutter inscribe is provided with one second smear metal discharge gutter;

    This second smear metal discharge gutter comprises one second helix angle, and the angle of the angle of this second helix angle of this second smear metal discharge gutter of part and this first helix angle is different.

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