how to drilling a long hole in a square bar
how to drilling a long hole in a square bar
(OP)
I need help in choosing the correct machining process to drill the long hole shown in the attached drawing
Material: steel SAE 1045
All dimension are in mm
any comments?
Thanks!
Material: steel SAE 1045
All dimension are in mm
any comments?
Thanks!





RE: how to drilling a long hole in a square bar
First pass, end mill the slot, then go after it with the custom cutter to get the round shape. Treat it like you're milling t-slots into a table, but with a round profile.
Alternatively, if you absolutely have to use a drill, or can't get a custom cutter... I'd start with a larger block that encompasses the hole size completely, get a decent gun drill, drill the hole, then mill the block to size, opening the hole up.
You don't specify tolerances, quantities, etc, so it's hard to give one answer.
_________________________________________
NX8.0, Solidworks 2014, AutoCAD, Enovia V5
RE: how to drilling a long hole in a square bar
Can't do it in one pass though.
RE: how to drilling a long hole in a square bar
Bore Tolerance: +/- 0,5
RE: how to drilling a long hole in a square bar
It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.
RE: how to drilling a long hole in a square bar
RE: how to drilling a long hole in a square bar
Mike Halloran
Pembroke Pines, FL, USA
RE: how to drilling a long hole in a square bar
RE: how to drilling a long hole in a square bar
I found a machining shop that was willing to give it a try. They are going to try to do the hole in a lathe
If this does not work I may be doing a redesign on the guide. I need something that is easy to make
I will comeback when the test has been done
RE: how to drilling a long hole in a square bar
I have changed the design of the guide. I bought a steel tube and made 3 supports (they are needed to bolt the guide to the machine) and the next step is to ground mill the face that is laying on the table (see picture attached)
So far looking good
Will be coming back with the finished guide report
RE: how to drilling a long hole in a square bar
Ground mill?
Slab mill
RE: how to drilling a long hole in a square bar
RE: how to drilling a long hole in a square bar
Herman
http://mymachineinfo.com
RE: how to drilling a long hole in a square bar
RE: how to drilling a long hole in a square bar