DRILL TAP FOR FORMING MICRO DIAMETER SCREW TAP AND MANUFACTURING METHOD THEREOF

摘要

Screw hole fastening microminiature tooth is formed the present invention relates to a kind of microminiature drill tap tool (2) and lives 1-2 outer diameters, and there is material containing cobalt (Co) made of HRc 55-70 hardness high-speed steel including drill tap main body (4). A kind of drill blade unit (6) and tapping unit (8) are formed continuously from the drill tap main body (4) of front end portion unit in order to which processing screw hole fastening microminiature tooth lives 1-2 millimeters of outer diameter. One or more flute profile chip discharges path (10) is from drill blade unit (6) and tap unit (8), fragment is discharged. Interior angle (& omega; ) drill blade unit (6) be on 115-125 degree, the chip area (10) of helical angle is in 5-30 degree. Therefore, the screw hole that microminiature drill tap tool (2) can form very little has processing without carrying out drilling and tapping respectively for 1-2 mm sizes. ;The 2014 of copyright KIPO submissions