Rolling Process in Metal Fabrication

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What is the rolling process in metal fabrication?

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The rolling process is a metal forming process where stock material is passed between one or more pairs of rollers to reduce thickness and maintain uniformity.

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What is a rolling mill?

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A rolling mill is a cylindrical shape of roll used in the rolling process, with a housing and set of rollers mounted on a machine known as a stand.

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What is cold rolling?

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Cold rolling is the process of rolling a strip at room temperature, which improves toughness, hardness, mechanical strength, and surface finish of the material.

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What are the applications of cold rolling?

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Cold rolling can produce foil (thickness < 0.2 mm), sheet (thickness 0.2 mm to 6 mm), and plate (thickness > 6 mm) for various industries including packaging, construction, and defense.

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What are the advantages of cold rolling?

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Advantages include good surface finish, improved machinability, close tolerance maintenance (up to 0.025 mm), and being a cheap and easy process.

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What is hot rolling?

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Hot rolling is the process of rolling a strip after heating it above the recrystallization temperature (400-700 °C), which changes the grain structure of the metal.

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What is continuous rolling?

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Continuous rolling aims to decrease the thickness of the metal while increasing its length with minimal width increase.

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What is transverse rolling?

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Transverse rolling uses circular wedge rolls where a heated bar is cropped to length and fed transversely between rolls.

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What is shaped rolling?

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Shaped rolling is a special type of cold rolling where a flat slab is progressively bent into complex shapes without appreciable thickness change.

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What is ring rolling?

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Ring rolling is a process to create seamless rings, used in applications like ball and roller bearings and railway wheel tyres.