You are a true and outstanding teacher , person , and your commitment to all the work you put in to become this good of a teacher and young do it for the goodwill not for money is noble and divine Dr. Anderson you should be the standard for all teacher to aspire to become. Thanks for your patience, Serves tp others a true light bearer and god smiles on you and is proud of the virtues calling to be a teacher a true wiser elder a real hero.
A practical application, when we cut one side of a cast Iron part (Ductal Iron) the flatness over 6 inches stays flat to about .0007 inches. Over the course of a day the millions of groups of 30ish atoms realign and allow the casting to warp up to .0014 inches/ 6in round. The fix was to rough out the casting in a lathe at high chuck clamping pressure, let the parts sit on a shelf for 24hrs, and then re run the part under low pressure. The change in pressure gave us .0002 extra flatness from the jaws not squeezing out the metal when the CBN diamond cutter went over the finish cut. Changing pressure and allowing for field to realign for pressure change gave us .0006 flatness on average. Tolerance was .001 max or the fuel pump would squeak. PS shop uses inches, inspection uses metric, anything goes wrong, we know who screwed up.
You are a true and outstanding teacher , person , and your commitment to all the work you put in to become this good of a teacher and young do it for the goodwill not for money is noble and divine Dr. Anderson you should be the standard for all teacher to aspire to become. Thanks for your patience, Serves tp others a true light bearer and god smiles on you and is proud of the virtues calling to be a teacher a true wiser elder a real hero.
This is a wonderful sentiment, thanks for sharing. Perhaps you can write my next advertising campaign?
Cheers,
Dr. A
A practical application, when we cut one side of a cast Iron part (Ductal Iron) the flatness over 6 inches stays flat to about .0007 inches. Over the course of a day the millions of groups of 30ish atoms realign and allow the casting to warp up to .0014 inches/ 6in round. The fix was to rough out the casting in a lathe at high chuck clamping pressure, let the parts sit on a shelf for 24hrs, and then re run the part under low pressure. The change in pressure gave us .0002 extra flatness from the jaws not squeezing out the metal when the CBN diamond cutter went over the finish cut. Changing pressure and allowing for field to realign for pressure change gave us .0006 flatness on average. Tolerance was .001 max or the fuel pump would squeak. PS shop uses inches, inspection uses metric, anything goes wrong, we know who screwed up.
Fascinating. Thanks for the education.
Cheers,
Dr. A