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.
By using specialized cutter geometry and incorporating smooth finishes with tough coatings, Toolmex Corp., created an end mill well suited to cut aluminum aggressively. This tool called the "Mako" is part of the SharC line of specialized tools from the same company.
Choose cutters, depths and tool paths with attention to particular steps in the process, and you can machine titanium more efficiently than you might suspect. Boeing offers practical tips.
What’s it going to cost? How much space do I need? What environmental hassles will I encounter? How steep is the learning curve? Exactly what is anodizing? Here are answers to preliminary questions shops have about bringing anodizing in-house.