How Do You Stop A Thin Aluminum Workpiece From Curling?
The material condition is more likely to be the culprit than any particular choice at the machine tool.
Share
Personnel from Boeing's Research & Technology group recently answered readers' questions. One reader asked the following.
Question
I milled some 6061 T6 aluminum into some long flat tapered wedges, 0.040 inch on the thick end to 0.005 inch over a span of 20 inches, and they curled when I released them from my fixture. I tried different tool geometries, speeds, feeds, and depths of cuts. Do you have any suggestions?
Response from Boeing’s Research & Technology group
It sounds like you are using material that is not stress-relieved. 6061 T6 is in the "quenched and aged" condition. I would recommend buying material in a stretched condition (6061 T651) and making sure to machine equal amounts of material from both sides in order to balance the stresses.
Related Content
-
AFRC, ATI Partner to Boost Aerospace Materials Innovation
ATI Inc. has joined the University of Strathclyde’s AFRC as a tier one member, aiming to develop metallic alloys that support sustainability in the aerospace sector.
-
Sandvik Coromant Inserts Provide Stable Turning of Aerospace Components
The new insert grades GC1205 and GC1210 cover a large application area within last-stage machining and intermediate-stage machining when turning aerospace engine components.
-
Horizontal High-Speed Machining Saves Hundreds of Work Hours
High-speed machining is the latest change at Blair-HSM South, helping this once old-fashioned shop improve productivity and morale while enabling new work.