| 1 MINUTE READ

Video: Accelerated Blisk Milling

CAM and cutting tool companies develop a process for machining a titanium bladed disk in less than half the conventionally expected cycle time.

Share

Facebook Share Icon LinkedIn Share Icon Twitter Share Icon Share by EMail icon Print Icon

Like this article? See more every month. Subscribe to Modern Machine Shop.


CAM developer Delcam and cutting tool supplier Technicut produced this brief video illustrating the highlights of a machining cycle that generated a blisk from an 804-mm diameter disk of titanium 6-4 in 35 hours. The two companies say that cycle time is less than half of what would be required to machine this same part with conventional methods. In the cycle shown, several factors contributed to that productivity:

  • Roughing is performed in stages throughout the process. Lower sections of blades are left in their rough state to maintain stiffness while the upper portion is being machined.
  • Tool paths specific to blisk machining programmed in Delcam’s PowerMill use barrel cutters from Technicut for semi-finishing and finishing. Offering a larger radius at the cutting surface than ballnose cutters, barrel cutters achieve the same cusp height between passes as a ballnose tool with a stepdown that can be three to four times as large.
  • Initial rough machining operations between the blades use Technicut’s Titan X-Treme Ripper end mill not only to remove material quickly but also to relieve stresses in the material introduced by forging.

Blisks—one-piece bladed disks—are increasingly used in turbine engines in place of individual blades machined separately and fixed into a hub. The completed blisk in this video has 31 blades, each 84 mm long with a root radius of 4 mm and scallop height of 10 microns.

�

RELATED CONTENT

  • An Overview Of 3+2 Machining

    An introduction to 3+2 machining: how it works and what it can do for your machine shop.

  • Composites Machining for the F-35

    Lockheed Martin’s precision machining of composite skin sections for the F-35 provides part of the reason why this plane saves money for U.S. taxpayers. That machining makes the plane compelling in ways that have led other countries to take up some of the cost. Here is a look at a high-value, highly engineered machining process for the Joint Strike Fighter aircraft.

  • Dispelling Small Machine Shop Myths

    Many job shops start in a garage with a used mill and a manual lathe. The owners of this Utah job shop took a different tack. Along the way to a very successful business, they've debunked a bunch of myths commonly held about job shops.