FIELD: process engineering.
SUBSTANCE: proposed twist drill has stem, rotational axis and cutting head with cutting edge. Note here that cutting edge inner cutting part forms the crest, while radially outer cutting part comprises outer cutting part inclined in opposite axial direction relative to inner cutting part at 2° to 8° relative to the plane perpendicular to rotational axis. Note also that outer cutting part and crest converge, and cylindrical tape. Mind that outer cutting part runs to the most distant edge of cylindrical tape.
EFFECT: increased machining quality nearby crest making 128° to 160°.
18 cl, 5 dwg
| Title |
Year |
Author |
Number |
| TWIST DRILL AND METHOD OF DRILLING COMPOSITE MATERIALS, USE AND METHOD REGRINDING AND MANUFACTURING THEREOF |
2012 |
|
RU2600465C2 |
| DRILL AND METHOD OF FORMING HOLES |
2017 |
- Matsuyama, Yousuke
- Ogashiwa, Takaaki
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- Oyama, Shintarou
|
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2009 |
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|
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|
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| TWIST DRILL |
0 |
- Semagin Ivan Illarionovich
|
SU1227369A1 |
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2017 |
- Matsuyama, Yousuke
- Ogashiwa, Takaaki
- Umehara, Noritsugu
- Oyama, Shintarou
|
RU2693242C1 |
| CERAMIC DRILL FOR HIGH-SPEED DRILLING |
2004 |
- Tjurrini Klod
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|
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2007 |
- Sampatkh Kartkhikejan
- Ni Vanjan
|
RU2431548C2 |
| ASSEMBLED ANNULAR DRILL BIT WITH MECHANICAL ATTACHMENT OF POLYHEDRAL CUTTING PLATES AND THROWAWAY PLATES FOR ITS EQUIPMENT |
2014 |
- Nastasenko Valentin Alekseevich
|
RU2656190C2 |
| DRILL FOR HIGH-SPEED DRILLING OF COMPOSITE MATERIALS, AND DRILLING METHOD USING ABOVE DESCRIBED DRILL |
2008 |
|
RU2469820C2 |
