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Saturday, August 23, 2014

Coolant Nozzles Increase Cutting Efficiency


Nozzles on Sandvik Coromant’s CoroTurn HP tool holders precisely direct coolant onto cutting zones, controlling chip size and increasing productivity. Credit: Sandvik Coromant.

Increased tool life, greater chip control and improved processability are benefits Sandvik Coromant cites for its new CoroTurn HP tool holders, which have up to three sets of fixed nozzles that are designed to precisely direct controlled streams of coolant at cutting zones.

The nozzles are not adjustable, but optimum flow paths have been established in tests on customers’ equipment, says Patrick Loughney, product manager for small part machining and turning at the Fair Lawn, N.J., company. Placement of the nozzles and low coolant trajectory break chips into controllable sizes that are easily removed from a workpiece.

Loughney adds that the precision flow lets operators reduce coolant pressure in applications.

Chip size ultimately depends on the type of metal that is being machined or turned, Loughney says. But users will “see a significant increase in chip-breaking because of the placement of the nozzles,” especially in finishing. Because the process controls chip size, chips are removed or redirected from workpieces more easily than with conventional cooling systems. This in turn frees operators to monitor more than one machine, he remarks, since they won’t be continually clearing chips.

Loughney says the nozzles can increase tool life up to 50 percent, or permit faster machining. Faster machining shortens tool life, even with the precision nozzles, but increases productivity. When all benefits are considered, the initial cost of the CoroTurn HP toolholders, which he describes only as “not that much,” is balanced by process and productivity improvements and by more efficient utilization of operators among multiple machines.

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