DEBURRING & FINISHING
abrasive pastes and similar techniques involve capital investment, often substantial, or require outsourc- ing. Manual deburring with knives, abrasive stones, brushes, and burrs, as everyone knows, is very labor intensive, as well as craft sensitive,” said Kroll. “Elbows, in particular, have always been a big chal- lenge to deburr. You are getting an edge that is blending out into the wall, so that a cutting tool that is going to cut at the intersection edge is going to jam and break against the wall or it’s going to scratch up that wall. “With ‘tee’ type intersections (fi ttings, tubing, manifolds, etc), if you have a much smaller hole that is drilling into a much larger hole you’re creating a fl atter circle which may be possible to deburr with a 45° chamfer tool. However, when you have two holes that are very close in size, you generate the potato chip-shaped edge. Similar to elbows, this is where you get into trouble with expanding blade-type tools. They’re going to want to jam and break,” said Kroll. Orbitool was designed to overcome
this problem. The Orbitool cutter has a fl exible shaft and a protective disk around the equator of a standard spheri- cal burr. Any time that the tool is inside the hole, it can’t scratch the wall of the bore. Feeding the Orbitool further into the bore moves it past the edge into open space, where the carbide burr begins deburring the edge. Deburring can be done manually like hand-grinding or automated in an NC mill or lathe. “In an NC mill, the tool makes a spiral motion where the edge of intersection is located, using the helical interpolation function basically like a thread milling program. The cutter head is positioned adjacent to the edge to be deburred and preloaded against the wall of the bore by positioning the shaft very close to, or even touching the wall of the bore. The tool is fed down the hole over the edge of intersection. The “spring-loading” of the defl ected shaft provides cutting pressure. The opera- tor doesn’t have to program the tool to fi nd the edge or know what the contour
Orbitool performs equally well in deburring cross-drilled holes and elbows of similar sized or dissimilar sized tubes.
is. The only thing that the operator needs to know is what diameter is being interpolated for the Orbitool to deburr the edges,” said Kroll. Orbitool cutters are available in diameters
The Original The only true solution for roughing
and trochoidal milling operations in the industry.
Tooling Technology Shrinking Technology Balancing Technology
Haimer USA, LLC | 134 E. Hill Street | Villa Park, IL 60181 | Phone: +1-630-833-1500 Email:
haimer@haimer-usa.com |
www.haimer-usa.com
See us at SOUTH-TEC Booth #1623 October 2015 |
AdvancedManufacturing.org 69 Measuring Instruments
Photo courtesy J.W. Done
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