Video: Parting Ways

In turning, a long overhang is an unavoidable challenge when parting off. The cutting speed approaches zero close to the center, disrupting normal cutting action. Both toughness and wear resistance are required. Sandvik Coromant responded to these challenges by creating a dedicated parting-off and deep-grooving tool, as opposed to the more universal predecessors.

The industry today has stringent requirements for both productivity and process security. Costly materials, such as stainless steel, are increasingly common and make it necessary to minimize the tool width, even down to 1 mm—the ambitious goal set for CoroCut QD.

The CoroCut QD system is designed for cutting depths of 15 to 20 times the insert width in bar diameter on bar-fed turning centers, sliding head lathes and automatic multi-spindle machines.

​The high-precision coolant (HPC) delivery offers coolant jets both over and under the insert. HPC provides effective cooling of the cutting zone for improved chip control, longer tool life and higher cutting data; the surface speed can be as much as 30 to 50 percent higher. A high coolant pressure optimizes the effect. Internal coolant channels and uncomplicated connections serve the usability requirement and eliminate the need to set up hoses or tubes.

The 20-degree seat angle in the QD-railed insert seat absorbs cutting forces. The quick-release insert-clamping mechanism provides a consistent clamping force with no need for a torque wrench. To counter the intense cutting forces at the edge, the design of the CoroCut QD insert geometries balances effective chip formation and stability, as well as coolant access.

Read "Five Process Security Tips When Parting Off" for more informaiton. Also, watch the first of the series of Parting Off webcasts here.