Video: Blisk Milling
The process seen here uses trochoidal tool paths and cryogenic cooling
Machine tool supplier MAG-IAS produced this video to illustrate an efficient approach to titanium blisk production. This process makes use of trochoidal milling, using a continually curving tool path to preserve tool life by keeping the stress on the tool consistent. MAG's cryogenic machining further extends tool life by delivering liquid nitrogen through the tool. (You can see the nitrogen leave the tool as a gas at various points in this video.) The five-axis machining center seen here is the company's NBV 700 5X model.
Fast CNC processing and high-pressure coolant contribute to removing metal at dramatic rates. But what should a shop know about cutting tools in high speed machining?
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.
With macros and canned cycles resident in the CNC on most contemporary turning centers, single point turning of OD threads can seem like almost a default process decision. However, for numerous applications, OD thread rolling has inherent advantages as an alternative to cutting threads.