DRILL BIT STRUCTURE

PURPOSE: A drill bit structure is provided to improve the performance of removing chips and flute spaces while two torsion grooves join at the end part of a cutting part, and formed into one torsion groove. CONSTITUTION: A drill bit structure comprises drill handle part(12) and a cutting part(16). T...

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Bibliographic Details
Main Authors CHIU SHIH FENG, CHIEN NICK SUNG HAO, LEE CHENG CHIA
Format Patent
LanguageEnglish
Korean
Published 10.07.2012
Subjects
BORING
MACHINE TOOLS
METAL-WORKING NOT OTHERWISE PROVIDED FOR
PERFORMING OPERATIONS
TRANSPORTING
TURNING
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Summary:PURPOSE: A drill bit structure is provided to improve the performance of removing chips and flute spaces while two torsion grooves join at the end part of a cutting part, and formed into one torsion groove. CONSTITUTION: A drill bit structure comprises drill handle part(12) and a cutting part(16). The cutting part is connected to the drill handle part. The cutting part comprises a first torsion groove(20) and a second torsion groove(22). The first and second torsion grooves are formed into the spiral shape at the end part of a drill. One or more front torsion angles( 2) and rear torsion angles( 3) are formed in the first and second torsion grooves. The second torsion groove is symmetrically separated from the first torsion groove. The second torsion groove having the rear torsion angle is gradually connected to the first torsion groove at the end part.
Bibliography:Application Number: KR20100138748