Professional Machinists... need some tips on brand names/quality...
Registered User
Joined: Feb 2004
Posts: 291
From: Abbeville , LA
OldSStroker...
from automotive machinists point of view
Example=> Sunnen Rod Heater
heat connecting rod's small-end to install rods on pistons in pressed-pin situations
another way to look at molecular expansion due to heat
from automotive machinists point of view
Example=> Sunnen Rod Heater
heat connecting rod's small-end to install rods on pistons in pressed-pin situations
another way to look at molecular expansion due to heat
Registered User
Joined: Nov 2002
Posts: 588
From: Indiana
Originally posted by OldSStroker Of couse some smarta$$ heats the ring and slips the ball into, but not thru it, and cools it to shrink fit the ring onto the ball! Anticipating this behavior, what could you do tho make this a recoverable situation for the teacher/demonstrator?
If you have to keep them made of the same materials, dry ice on the ball and heat on the ring is the only thing that comes to mind, and hope that the heat transfer between the two isn't ideal.
Just a thought...
Registered User
Joined: Oct 2002
Posts: 2,931
From: Upstate NY
Originally posted by nateh
If I were just demonstrating the principle and the materials were irrelevant, I'd make the ring out of material with a higher rate of thermal expansion. Then when the stuck assembly is heated as a unit, the ring would get "more bigger" than the ball. Depending on how tight the interference fit was, it would come apart that way.
Just a thought...
If I were just demonstrating the principle and the materials were irrelevant, I'd make the ring out of material with a higher rate of thermal expansion. Then when the stuck assembly is heated as a unit, the ring would get "more bigger" than the ball. Depending on how tight the interference fit was, it would come apart that way.
Just a thought...
We make the "*****" (pistons) out of higher expansion aluminum and the "rings" (cylinders) out of iron. We then worry about piston slap when the engine is cold. In most OEM situations we DO have it both ways: almost no slap when cold and no scuffing when very hot.
We also do the opposite with pistons and pins where we use a very close fit, a fraction of a .001. At least we're using the dissimilar materials to an advantage here.
Registered User
Joined: Jul 2000
Posts: 520
From: MD
Originally posted by OldSStroker
Of couse some smarta$$ heats the ring and slips the ball into, but not thru it, and cools it to shrink fit the ring onto the ball! Anticipating this behavior, what could you do tho make this a recoverable situation for the teacher/demonstrator?
Of couse some smarta$$ heats the ring and slips the ball into, but not thru it, and cools it to shrink fit the ring onto the ball! Anticipating this behavior, what could you do tho make this a recoverable situation for the teacher/demonstrator?
Otherwise, bludgeon the student repeatedly over the head until the ball comes loose?
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