Unit-I: Basics of Mechanics and Force System
Unit 2 Part 2: Rolling Process
Subject: Manufacturing Process I Unit 2: Metal Forming Processes Unit 2 Part 2: Rolling Process Definition of Rolling It is a forming process in which the raw material is heated to plastic state & it is compressed between two rolls of equal size and the raw material is deformed under the combined action of compression and shear such that the cross-section area is reduced at the expense of increasing length. Note Rolling is generally a Hot Working Process. The raw material used in rolling is called INGOTS which are made by casting process. After rolling the ingots, they become BLOOM . Blooms are bars of square cross section. Blooms are further rolled into BILLETS. Billets are shorter in length. Types of Rolling Depending upon the working temperature, Rolling can be of two types, like Hot & Cold Rolling. Hot Rolling When the working temperature in a particular rolling process is above the recrystallisation temperature of the work metal, then it is called hot rolling. Cold Rollin...
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