Trepanning drill

The utility model discloses a trepanning drill comprising a cutting part, a guide part and a tail part, wherein the head of the cutting part is a drill bit; the periphery of the cutting part is provided with an iron scrap removing groove extending to the guide part; the center of a drill body formed...

Full description

Saved in:
Bibliographic Details
Main Authors MA YONGQIANG, CAI YONG, HU CHAOBEI, ZHANG PEIYANG, ZHANG JIJUN
Format Patent
LanguageChinese
English
Published 12.05.2010
Subjects
BORING
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
DYNAMO-ELECTRIC MACHINES
ELECTRICITY
GENERATION
MACHINE TOOLS
METAL-WORKING NOT OTHERWISE PROVIDED FOR
PERFORMING OPERATIONS
TRANSPORTING
TURNING
Online AccessGet full text

Cover

More Information
Summary:The utility model discloses a trepanning drill comprising a cutting part, a guide part and a tail part, wherein the head of the cutting part is a drill bit; the periphery of the cutting part is provided with an iron scrap removing groove extending to the guide part; the center of a drill body formed by the cutting part, the guide part and the tail part is provided with inner holes communicated with each other; the inner holes and the excircle of the drill body are respectively conical; and the outer diameter of the drill body is 30mm. The coaxality of the cutting part, the guide part and the tail part is not more than 0.02mm. The trepanning drill is used for processing holes with the diameter of 30mm or metal sampling, can prevent the radial fracture of the trepanning drill caused by collision of a core rod with the walls of the inner hole when in trepanning, and has simple structure, strong implementability, convenient removal of iron scrap and high production efficiency.
Bibliography:Application Number: CN2009274077U