Cutting holes in a cavity
Cutting holes in a cavity
(OP)
Image shows a simplified version of my part. It is a stainless steel block made of 10 mm plate filled with lead. There is a cavity in the block 150x250x150 deep with 6xM10 holes in the bottom side. These holes have to be cut quite accurately because they are used to mount some precision equipment. I was wondering what the best manufacturing process for cutting these holes is. Thanks in advance.
[img=http: //img218.i mageshack. us/img218/ 7144/block pn4.th.gif]
[img=http:





RE: Cutting holes in a cavity
How accurate is quite accurate wouldn't drilling and tapping
suffice?
regards
desertfox
RE: Cutting holes in a cavity
The holes should be within 50 microns. I also might have some holes for dowel pins. The cavity is relatively small, 150x250x150 mm deep.
Regards,
solidNeutron
RE: Cutting holes in a cavity
I would have the holes prior to tapping put in by a jig boring machine.
regards
desertfox
RE: Cutting holes in a cavity
I appreciate it.
solidNeutron
RE: Cutting holes in a cavity
If you have a problem finding someone to jig bore 50 microns or less, I would find someone to jig grind the holes.
A good jig grind hand can hold both size and location too 2.5 microns or less.
Either way I wouldn't locate on the fasteners.
RE: Cutting holes in a cavity
Also even with this, if you use say 2 pins then making one of the holes slotted may have advantages. Effectively the pin in the very close hole gives X & Y location. The other pin just gives orientation.
Have you taken into account the position tolerances of the hole patterns not just on this but also on the mating part? ASME Y14.5 annex B has standard formula to help calculate this.
KENAT, probably the least qualified checker you'll ever meet...
RE: Cutting holes in a cavity
How much will you have to pay for a screw with the treaded part having an outside dimension tied up to 50 microns?
RE: Cutting holes in a cavity
RE: Cutting holes in a cavity
I'll use a couple of dowel pins and tap the other holes as GageDr suggested.
Cheers,
solidNeutron