All, I have been designing a new type of tapping head aimed at small shops with older equipment. It is designed to keep taps from breaking, it detects missing, short or undersize holes, and it does windows. Well, it doesn't really do windows. Anyway, I thought that as long as I was making something that did all that it would be neat if it could report on dull taps too. I may be able to use clutch pressure to arrive at some torque number but I don't know how the clutch material behaves over time, if the pressure will change significantly over time for the same torque. The tapping head will easily handle #2 to 1/4 inch taps in soft and hard materials. I think it will even handle taps as small as #0. Experiments show that I am able to use it to tap #0-80 holes in steel without breaking taps but I am not yet convinced that a machine tool will be able to. When I'm tapping there is some feel whereas a CNC machine will only feed the tap at the programmed speed. I was hoping that some sort of strain gauge applied to some sort of rotating shaft subjected to some amount of torque might be pretty straightforward and cheap. It is not. But thanks for the replies anyway, I really appreciate it. Cheers, Eric
- posted
9 years ago