Video: Plunge Roughing in Aluminum
Even in aluminum, plunge roughing can be an effective way to realize high productivity.
This video shot by Boeing St. Louis illustrates plunge roughing in aluminum with a 2-inch-diameter tool at 0.3 radial depth of cut, to a depth of 8.75 inch depth of cut. Feed rate is 300 ipm and metal removal rate is 72 cubic inches per minute. Because of the high metal removal rate, Boeing often recommends the use of plunge roughing as part of a strategy for making efficient use of lower-rpm machining centers—even when the workpiece material is aluminum. For more, see the article under “Editor Picks” at right.
The right choices in tooling and technique can optimize the thread turning process.
Liquid coolant offers advantages unrelated to temperature. Forced air is the fluid of choice in this shop...but even so, conventional coolant can't be eliminated entirely.
Reducing cutting fluid use offers the chance for considerable cost savings. Tool life may even improve.