Temperature of metal
Temperature of metal
(OP)
I am trying to settle a dispute and can find nothing in the machinery's handbook or online to support or deny either side of this issue. In high tolerance machining, temperature changes in your material can make a difference. When a piece of metal is heated it expands. How does this affect the size of holes bored in the piece. Will the holes enlarge with the part or will the material expand into the holes making them smaller? If you can provide proof of your answer I would appreciate it.
Thanks,
Dblcrona
Thanks,
Dblcrona





RE: Temperature of metal
Take any two points in a block of material. Draw an imaginary line along any path between these two points. If the material along this path expands the line get longer. The points have moved farther apart. It doesn't matter if there is a hole in the material directly between these points.
RE: Temperature of metal
RE: Temperature of metal
Can't remember exactly but basically:
We had a metal ring with a ball that didn't quite fit thorugh it.
We heated the ring, tried again and the ball fitted.
It's the same reason that in some interference fits you'll slightly heat the female item with the hole while cooling the male component.
KENAT, probably the least qualified checker you'll ever meet...
RE: Temperature of metal
RE: Temperature of metal
Temperatures around 70F are considered nominal.
RE: Temperature of metal
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RE: Temperature of metal