- Feb 20, 2010
- Reaction score
- Twixt Tyne and Tees
Reality is the ability to retire comfortably at 55 years( far to late in life but who cares now at 88)Goldstar31, a required topic in Mechanical Engineering school (Manufacturing Processes class to be specific) is learning how to calculate the temperature rise of metal chips as they exit the cutter-head of a lathe (a function of the material's yield strength, tensile strength, Young's modulus, Poisson's ratio, shear-angle of the cutter, and obviously the volumetric removal rate). It's calculus based equations, rooted in both Mechanics-of-Materials and Thermodynamics.
The purpose of the lesson was to show that it's mathematically possible to accurately predict the actual cutting-power requirements for any particular machining operation, and the expected temperature rise of the cutter (which will temper/anneal if it gets too hot), and also the expected temperature rise of waste chips - because some metals will make for very exciting shop-fires with inadequate cooling . . .
Welcome to reality. . . . .
Reality is to realise that
'one man's meet is is another man's poisson' and of course for the Francophile -- Poisson D'Abril.'
But for those who can really do maths, having a machine shop or whatever you call it and whatever I would call it, is a fine way not only to alienate neighbours but to ruin a fairly substantial investment of 2/3rds of a million in sterling and that , if you are still with me, is a lot of scrap lathes.