Bulk Deformation And Sheet Metal Forming

The pri mary use of the tenn bulk deformation is to distinguish it from sheet fonning processes.

Bulk deformation and sheet metal forming. Bulk forming processes one is bulk forming and the other is sheet metal forming. Bulk deformation is characteristic in that the work formed has a low surface area to volume ratio. Typically metal forming processes can be classified into two broad groups. Machines for each use tensile compressive and shear stresses or a combination of tensile and compressive stresses to permanently deform the metal into desired shapes.

In sheet forming opera tions the defonnation stresses are usually in the plane of the sheet metal whereas in bulk defonnation the. Bulk deformation processes and sheet metal working processes. Bulk defonnation is a metal fonning process where the defonnation is three dimensional in nature. Bulk forming and sheet metal forming.

Most deformation processes and their associated forming machine tools can be placed into one of two groups. Several methods for measuring interfacial friction during plastic deformation have been developed some of which have been listed by wang and lenard 1992 a more comprehensive list applicable to other metal forming processes including bulk and sheet metal forming has been presented by schey 1983 in summary they may be divided into the following categories. Usually the initial shape is a simple one. Metal forming processes can be classified under two major groups.

The key difference between bulk deformation and sheet metal forming is that in bulk deformation the work parts have a low area to volume ratio whereas in sheet metal forming the area to volume ratio is high. Bulk deformation refers to the use of raw materials for forming which have a low surface area to volume ratio.