So I read about this thing called the “automatic generation of gages”. Basically, it’s a process of making three flats surfaces by manually rubbing them against each other in pairs. You can’t get them truly flat with two pieces cause it causes belling and curvature between the pieces. i.e. one would be concave while the other convex. What I don’t get is why. Because even if all parts receive an equal number of strokes or the cutting powder is equally spread between them, it won’t work. So what causes the curvature?
Maybe I should first ask how grinding works when they are both made of the same material. If one was harder than the other it would just cut away from the softer material. But when they are the same material how does it work? is it that they are not equally hard everywhere or something? And why does it specifically lead to a curvature.
Apologies if the answer is obvious.
In: Engineering
As they start to take on the convex/concave shape, rubbing either of those on something else will grind down the high points.
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