Title:
MICRO DRILL BIT
Document Type and Number:
WIPO Patent Application WO/2024/083136
Kind Code:
A1
Abstract:
A micro drill bit, comprising a drill tip part. The drill tip part comprises two sections of short chisel edges which are symmetrically arranged with respect to the center; at least one section of first cutting edge having a gradient different from that of the short chisel edge is arranged at the end of each short chisel edge away from the other short chisel edge; when a plurality of sections of first cutting edges are arranged, the gradients of the plurality of sections of first cutting edges are different. According to the micro drill bit, chisel edges of conventional drill bits are changed into short chisel edges and at least one section of first cutting edge having different gradients, so that the length of conventional chisel edges is reduced, the drilling centering capacity is improved, and moreover, the thickness of a micro drill core is increased by first cutting edges, and the strength of micro drills is enhanced while a micro drill centering effect is improved.
Inventors:
LIU LIANDONG (CN)
YAO MIN (CN)
HU CHENYI (CN)
YAO MIN (CN)
HU CHENYI (CN)
Application Number:
PCT/CN2023/125080
Publication Date:
April 25, 2024
Filing Date:
October 17, 2023
Export Citation:
Assignee:
JIAXING WORLDIA DIAMOND TOOLS CO LTD (CN)
International Classes:
B23B51/00
Foreign References:
| CN115673387A | 2023-02-03 | |||
| CN102357665A | 2012-02-22 | |||
| CN106424832A | 2017-02-22 | |||
| CN108057918A | 2018-05-22 | |||
| US20030175085A1 | 2003-09-18 |
Attorney, Agent or Firm:
CHONGQING CONRISEN INTELLECTUAL PROPERTY OFFICE (GENERAL PARTNERSHIP) (CN)
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