Straightness of bars
Straightness of bars
(OP)
Does anyone have any information or ideas on straightness inspection of thin bars.
I am trying to measure 1/4 aluminum extruded material to what the standard, I believe is, .002 / Ft.
We are buying 12Ft bars. The finished product is 18" long.
Any advice? Thank you in advance





RE: Straightness of bars
Regards,
Cory
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips Fora.
RE: Straightness of bars
Yes and maybe. I would like a short term solution and, if not feasible, a long term possibly purchasing something.
- Creech
RE: Straightness of bars
A granite surface plate of sufficient size is not terribly expensive.
Mike Halloran
Pembroke Pines, FL, USA
RE: Straightness of bars
How about mounting a laser pointer (cheap one would be fine) about an inch or so from the side of the piece, then hold a scale (ruler) against the side of the piece every XX inches along the length. Record where the laser hits the ruler at each point. Graph it along with a line connecting first and last point (to compensate for alignment of laser pointer). The variance between the two lines is the straightness of the piece.
RE: Straightness of bars
I use it mainly for steel (which the listed ones are) but the alum version should be there too.