Plunge-And-Sweep For Finishing Corners
Machining animation from Boeing illustrates effective techniques for titanium workpieces.
In this machining simulation provided by Boeing Research and Technology (using CGTech software), corners are finished through plunge-and-sweep, a technique detailed in the article under “Editor Picks” at right. One tool plunges (this part happens fast), then the next tool sweeps out from the plunged area. Boeing has found this to be the most effective way to machine small-radius internal corners in titanium.
Find details in the article at right. Or, see other videos in this series:
1. Video: Finishing Walls In Titanium
2. Video: Finishing A Pocket Floor In Titanium
3. Video: Plunge-And-Sweep For Finishing Corners
One of the most common methods of tapping in use today on CNC machines is 'rigid tapping' or 'synchronous feed tapping.' A rigid tapping cycle synchronizes the machine spindle rotation and feed to match a specific thread pitch. Since the feed into the hole is synchronized, in theory a solid holder without any tension-compression can be used.
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.