FIELD: turning; drilling.
SUBSTANCE: group of inventions relates to the processing of materials by cutting and can be used for drilling deep holes. Drill comprises a basic body, a cutting insert having cutting edge that is formed between the chip surface and the back surface. Chip removal surface comprises a bevelled surface adjacent to the cutting edge of the cutting insert and the clearance surface. Chamfer surface has a width of at least 0.1 mm and in each infinitesimally small portion along the cutting edge forms an angle of at least 25° and not more than 50° with the reference plane extending perpendicular to the centre or axis of rotation of the drill.
EFFECT: efficient chip breaking and removal thereof from the drilled deep hole.
15 cl, 15 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| DRILL BIT AND CUTTING PLATE FOR DRILL WITH CHIP BREAKER LEDGES | 2015 |
|
RU2702166C2 |
| DRILLING INSERT | 2018 |
|
RU2771284C2 |
| TWIST DRILL | 2006 |
|
RU2414996C2 |
| EJECTION DRILLING SYSTEM | 2008 |
|
RU2559601C2 |
| DRILL | 2012 |
|
RU2566700C2 |
| EJECTOR SYSTEM OF DRILLING | 2008 |
|
RU2429948C1 |
| TWO-FLAT-HEAD DRILL WITH AXIAL BORE FOR FEEDING LUBRICANT-COOLANT | 0 |
|
SU1509195A1 |
| DRILL | 2001 |
|
RU2277458C2 |
| ASSEMBLED ANNULAR DRILL BIT WITH MECHANICAL ATTACHMENT OF POLYHEDRAL CUTTING PLATES AND THROWAWAY PLATES FOR ITS EQUIPMENT | 2014 |
|
RU2656190C2 |
| DRILL WITH POLYHEDRAL CUTTING TIP | 1994 |
|
RU2129479C1 |
