What to do when you can not clamp it
September 27, 2012, 11:51 pmArticle Summary
Eldar Gerfanov (Admin)
September 27, 2012, 11:51 pm
October 13, 2012, 3:58 pm
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Fri December 6, 2024, 4:14 pm
Fri December 6, 2024, 4:14 pm
If you cant, then dont clamp it at all!.
Skin it!
In here i have to program and machine several sets of roundish aluminum pieces with +/-0.001" outside tolerance. and within 0.002" thickness repeatability.
Instead if fixturing it one by one i decided to skim cut a 33" x 23" x5/8" to within 0.0015 flat. And then machine each piece completely leaving .005" outside to holt everything together.
Worked out great.
for pics
Eldar Gerfanov (Admin)
2 types of parts 6 pieces each - 12 parts total per sheet!
Eldar Gerfanov (Admin)
this is how each part looks like. as you can see its almost impossible to finish  it in one setup any other way
BAMCNC.com
I'm doing something similar, can you explain in more detail exactly how your doing it, I'm having issues.
Eldar Gerfanov (Admin)
Updated by: Eldar Gerfanov (Admin)October 28, 2012, 11:22 pm
Well, i think the 1st post is self-explanatory. But if you are having issues then i will be mose successful in helping you if i know what those issues are. Are you having hard time keeping them together? If yes then the trick to that is simple: rough and finish to within 30 thou from breaking through, and then finish only in 2 steps if 12 or so thou until you are within 5 thou wrom the table. The plate however needs to be VERY flat - otherwise some pieces may go balistic on you. BTW sometimes i cheat and apply a drop of CRAZY glue in the middle when i am not too sure ;)