Classification of forming process.

Major Groups of processes are 1. Rolling Process. 2. Forging process 3. Drawing process 4. Extrusion process 5. Sheet metal forming process 6. High Energy rate forming process. Based on type of Force applied to the work piece as it is formed into shape . 1. Direct Compression Type Processes : force is applied to the surface of the work piece & the metal flows at right angle to the direction of the compression . Eg Forging & rolling 2. Indirect Compression Process : Eg Wiredrawing & tube drawing , extrusion & deep drawing of a cup. The primary force are frequently tensile , but indirect compressive force developed by the reaction of the w/p with die reach high value. 3. Tension type forming : Eg Stretch Forming : where the metal is wrapped over the contour of a die under the application of the tensile force . 4. Bending process : application of bending moments to the sheets . 5. Shearing process : Involves sufficient shearing forces of sufficient magnitude to rupture the metal in the plane of the shear . Another Classification 1. Primary mechanical working Process ( processing operations ) 2. Secondary working Process ( Fabrication)