FIELD: metal processing. SUBSTANCE: twist bit has cutting end with chip-disposal flutes 1 and backs 2,3. The central angle θ between chip-disposal flutes 1 in the cross section is not equal to 180 degrees, that results in inequality of backs 2 and 3. Larger back 2 has helical groove 4, having inserted or rolled-in tube 5, which forms a closed duct to supply cutting fluid to cutting zone. EFFECT: enhanced wear resistance, improved supply of cutting fluid. 3 dwg
Title | Year | Author | Number |
---|---|---|---|
DEVICE FOR CUTTING THIN-WALLED PIPES | 1991 |
|
RU2010687C1 |
METHOD OF PROGRAMMING THE RECONFIGURED MANIPULATOR | 1991 |
|
RU2043914C1 |
CUPOLA GAS CLEANING SYSTEM | 1991 |
|
RU2016360C1 |
0 |
|
SU469545A1 | |
RECIPROCATION DRIVE CONTROL METHOD | 1991 |
|
RU2106950C1 |
METHOD INCREASING DURABILITY OF PARTS OF MOVABLE JOINTS OF MECHANISMS IN MACHINES | 1992 |
|
RU2107902C1 |
PIG IRON FOR RAPIDLY WEARING PARTS | 1991 |
|
RU2007493C1 |
METHOD AND DEVICE FOR LASER DRILLING | 1991 |
|
RU2012464C1 |
DEVICE FOR TWO-SIDED MACHINING OF FLAT PIECES | 1991 |
|
RU2028914C1 |
GEOTHERMAL POWER PLANT | 1991 |
|
RU2027867C1 |
Authors
Dates
1995-05-20—Published
1988-06-29—Filed