Heat is a major cause of tool failure. In many cases flood coolant cannot get to the cutting edge where temperatures can reach over 1,000 F. However, coolant delivered at high pressure and velocity can reach the cutting edge to lower temperatures and improve the cutting action of the tool. The result is higher surface speeds while cutting to improve productivity and lower tooling cost.
Chip interference is a major cause of broken and damaged tooling. Many materials make long, stringy chips that can wrap around the tooling to cause premature tooling failure. High pressure coolant helps to break chips and keep them from falling back into the cut where they could be recut and could damage inserts.
Seco Tools Inc. (www.secotools.com) has introduced a range of high performance tools that deliver coolant at pressures from 70 psi to 5,000 psi directly to the insert cutting edge. The company said its JetStream tooling achieves exceptional chip control along with increased cutting speeds and feedrates across virtually all coolant pressures and many material types — specifically titanium alloys, but also nickelchromium, aluminum, stainless steel and other steel alloys. The company said the use of this tooling in conjunction with water-based or cutting oil coolants applied at pressures between 200 psi to 5,000 psi can cut cycle times in half while prolonging tool life.
Coolant is applied through the tooling nozzle at high pressure close to the cutting edge. That cools the work area and produces smaller, hard, brittle chips. The high-pressure jet then breaks and lifts the chips away from the cutting area without damaging expensive components or tooling.
Additionally, there is less contact of the chip on the rake face to help prevent crater wear and improve surface finish.
The coolant inducer on the ISO range of JetStream Tooling toolholders pivots, allowing easy access to index the carbide insert in the normal way while the tool is still in position.