The force exerted by rollers on the sheet reduces its thickness and increase the strength of the sheet.
Cold working sheet metal.
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Cold working or cold forming is any metalworking process in which metal is shaped below its recrystallization temperature usually at the ambient temperature.
Meaning of cold working.
The steel bars we machine are typically cold drawn cold worked.
Most of cold working processes are performed at room temperature.
In the precision machining industry cold working processes can include thread rolling thread forming swaging crimping staking planishing and metal spinning.
The haynes and hastelloy alloys can be readily formed into various configurations by cold working.
The cold working of the metal increases the hardness yield strength and tensile strength.
In this method the shape changes but the volume of the metal remains constant.
Such processes are contrasted with hot working techniques like hot rolling forging welding etc.
The process consists of a set of two or more rollers spaced closed together and the sheet or strip of metal is passed through them.
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Metal is said to be cold worked if it is mechanically processed below the recrystallization temperature of the metal.
Bending of sheet metal is another process for cold working which involves deforming metal over a work axis thereby creating a change in the geometry of the metal.
Cold work is defined as the plastic deformation of a metal below its re crystallization temperature.
When a metal is cold rolled it is plastically deformed as it is forced between the two rolls.
Cold rolling is often used commercially in order to produce sheet metal plates and bars.