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Can someone please describe upsetting as it would be used to narrow the bottom opening of a vertical hole to prevent a pin from working itself out?
"Upset" is a somewhat loose term, but as we tended to use it blacksmithing it would, for the purpose of your application, commonly refer to an operation on the pin, not the hole. The end of the pin protruding from the hole would be hammered (peened over) to form enough of a mushroom head to prevent its backing out of the hole.
-Marty-
When's your term paper due ?Can someone please describe upsetting as it would be used to narrow the bottom opening of a vertical hole to prevent a pin from working itself out?
I would think that staking would be done with the pin in the hole.I think "Upsetting" the hole would be called "Staking"
upset forging "increase diameter by reducing length "
per wikipedia
I only know how to upset my wife.
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cold working is similar to hot forging to change part shape BUT when you cold work metal it gets a stronger tensile strength with less ductility. eventually it will crack rather than allow pushing or hammering the metal to a more different shape.
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take a stronger grade 8 bolt and bend it. normally it will easily snap or break under load cause its damaged from it being bent. a weaker grade 2 bolt maybe you can bend once and it is still ok.
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got to watch cold working parts. when they crack, snap or fail often its with little to no warning. what appears to be ok is not ok under load
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