Chamfer a Shaped Bar
Chamfer a Shaped Bar
(OP)
I am investigating a method for chamfering the end of a shaped bar (See attachment). The major dia. is around 3". These bars would be around 12' in length. I am needing a 0.400/0.500 X 30 degree chamfer on the ends.
What are some economical ways about achieving this? Most chamfering machines that I've seen on the market are for round material. Thanks for the help.
Kevin
What are some economical ways about achieving this? Most chamfering machines that I've seen on the market are for round material. Thanks for the help.
Kevin





RE: Chamfer a Shaped Bar
Software For Metalworking
http://closetolerancesoftware.com
RE: Chamfer a Shaped Bar
Mike Halloran
Pembroke Pines, FL, USA
RE: Chamfer a Shaped Bar
-TJ Orlowski
RE: Chamfer a Shaped Bar
RE: Chamfer a Shaped Bar
I've look at catalogues for bevelers and bar chamfering machines and I find nothing, even with modifications' that could do the job
Is this a one-off or quantity job?
RE: Chamfer a Shaped Bar
RE: Chamfer a Shaped Bar
A) A very long table that could hold the whole part
or
B) A machine that has a side door or panel that could be opened or removed and the piece could be loaded through the side, and supported on the worktable and the outside during the cutting operation.
The bulk of the time on each piece would be loading/centering and unloading. I'm not sure how cost effective it will be.
-TJ Orlowski
RE: Chamfer a Shaped Bar
RE: Chamfer a Shaped Bar
Depending on the volume you could build an angle fixture on an angle grinder and do the job free hand
RE: Chamfer a Shaped Bar
If all they need is a guide chamfer to feed into a screw machine, just do a chamfer on the 'outer diameter' since that is what will be guiding the bar in.
"Wildfires are dangerous, hard to control, and economically catastrophic."
Ben Loosli
RE: Chamfer a Shaped Bar
RE: Chamfer a Shaped Bar
RE: Chamfer a Shaped Bar
If the screw machine only needs this feature for loading the bars, why not make a chamfered & hardened lead-in bushing on the screw machine itself? That way, the bars don't need to be pre-machined.
If it is needed inside the machine near the chuck or business end, then the other suggestions re CNC profiling should work.
BTW, is it understood that the entire profile needs chamfering or tapering at 30deg?........as unclesyd mentions, some of the profile may be reduced to whatever cutter can effectively get inside the inner radii.
RE: Chamfer a Shaped Bar
I looked through my profile sander brochures over the weekend and could fine nothing that might be worth considering.
You could contact someone like Skill Craft or J-Lok with your requirement.
http://www.skill-craftcompany.com/index.html
http://www.j-loc.com/index.htm
Another possibility is to modify your present work holding device where the sharp edge entry would be self aligning. If practical another possibility would be to add a guide ring to existing work holding device.
RE: Chamfer a Shaped Bar
At a "low tolerance" problem on a long piece of bar stock (12 foot) for only 40 per week -just hit the end to be chamfered with a pad grinder. 2 minutes per bar. 40 grit pad. No loading or unloading or aligning into a CNC machine for that long a bar, no mods to the CNC machine.
Not even much of a need to unload the bar from the pallet even.
But - What am I missing or misunderstanding?
Robt
RE: Chamfer a Shaped Bar
Software For Metalworking
http://closetolerancesoftware.com
RE: Chamfer a Shaped Bar