Cogsdill AEX Series Roll-a-Finish® Tool Saves Time and Money
Secondary operation is eliminated as finish is achieved in the original CNC turning process secondary operations are expensive and time-consuming. A manufacturer of
gas sensors discovered that Cogsdill roller burnishing could help them achieve
the desired surface finish on a plunger on the original machine on which the part was
produced, thereby eliminating a hand-polishing operation.
The customer needed a 4 microinch (0.1 micrometer) finish. They were getting
an 8-10 finish in their turning process, and hand polishing to a 4. Cogsdill was asked if we could help them achieve the 4 finish on the CNC lathe on which the part was turned, so that the hand polishing operation could be eliminated. We set up an AEX-1 Roll-a-Finish® tool on the lathe and, in keeping with our usual practices for external burnishing tools, worked at the high side of the part diameter tolerance.
Tool "interference" (i.e., the amount by which the effective tool diameter is smaller than the prepared part O.D.) was set at .001 inch (.025mm). Actual stock displacement was .0004 inch (.010mm).
Over a run of 20 parts, the finish was as good as 2 microinches (.05 micrometer)
and no higher than 3.5 microinches (.09 micrometer). The time-consuming and costly
hand polishing operation was eliminated, and the tool paid for itself after a run of only
Machining data
Machine type: CNC lathe
Tool no.: AEX-1
Material: Stainless steel
Spindle speed: 1200 RPM
Feed rate: .030 in. (.76mm)
Cycle time: 5 seconds
Coolant: Oil
Size required: .580 +_.0003 in. (14.73 +_.008mm)
Size achieved: .580 +_.0002 in. (14.73 +_.005mm)
Finish required: 4 microinch (0.1 micrometer)
Finish achieved: 2-3 microinch (0.05-0.08mm)
Cogsdill Tool Products offers a wide array of standard tooling and a broad range of solutions for burnishing including: Standard Roll-a-Finish tools for IDs and ODs; Special designs for tapers, faces and contours; Single-roll and diamond tools for ODs, large IDs, faces, tapers, contours, and irregular surfaces; CX external burnishing machines for shafts or cylindrical surfaces of any length. Parts are sized, finished, and work-hardened in seconds! Refer to our catalog no. 500, Burnishing Tools and Machines, for more information.
In 1914 Stuart A. Cogsdill set up shop in Detroit as a cutting tool regrinding and repair service. He soon began designing and manufacturing special tools for early automotive pioneers such as Henry Ford and the Dodge brothers. Today Cogsdill Tool still offers its 21st century customers the same commitment that inspired its founder: We will develop and build innovative tooling solutions for your tough manufacturing problems. Cogsdill has two operating units, one in the United
States and one in the United Kingdom:
Contacts:
Public Relations:
Fred Ogburn Corporate Communications Manager, USA
(803)438-4000 ext 218 fogburn@cogsdill.com
