Solution - high pressure coolant
Increasing the coolant pressure has a positive effect on both chip breaking and tool life.
CoroTurn HP is designed with fixed nozzles to enable high precision of the coolant supply at the cutting edge of the insert - a direct route to excellent chip breaking, process security and high productivity. To optimize the machine capabilities and further improve tool life and chip formation, coolant delivery and velocity can be fine tuned by changing the nozzle diameter.
Read more about high pressure coolant
The coolant jet has three main effects:
To provide cooling of the insert in the contact zone
- To quickly force the chip away from the insert face, reducing wear on the insert
- To help break the chip into smaller pieces and evacuate it from the cutting area
For rough turning, a coolant pressure of 100 bar provides a tool life that is twice as long as with 15-20 bar. For semi-finishing and finishing, as much as seven times as long!
Tool life comparison, finishing operation
Material: Austenic stainless steel (CMC 20.11)
Insert: CNMG 120418
Grade: GC1010 SF
|Time in cut (min)|
Tool life × 7
By applying a coolant pressure of 100 bar, tool life increased by seven times in the finishing operation. Please also note that the wear value (VB) is lower after 33 minutes in cut with 100 bar pressure, than after less than five minutes with a conventional coolant pressure of 15 bar. For the roughing operation, tool life increased by approximately 40% when using high pressure coolant.
Time in cut (min)
15 bar pressure
100 bar pressure