Bulk Forming And Sheet Metal Forming

The application of bulk forming processes to sheet or plate semi finished products sometimes in combination with conventional sheet forming processes creates new products with the requested properties.

Bulk forming and sheet metal forming.

Sheet metal is metal formed by an industrial process into thin flat pieces. Bulk defonnation is a metal fonning process where the defonnation is three dimensional in nature. In sheet forming opera tions the defonnation stresses are usually in the plane of the sheet metal whereas in bulk defonnation the. Tools include punch die that are used to deform the sheets.

Elastic strain field sheet bulk metal forming means technological processes in which plastic deformation zone size is comparable to the sheet thickness. Bulk deformation is characteristic in that the work formed has a low surface area to volume ratio. Sheet metal is one of the fundamental forms used in metalworking and it can be cut and bent into a variety of shapes countless everyday objects are fabricated from sheet metal. In sheet metal working the metal being processed will have a high surface area to volume ratio.

2012 as semifinished product sheets with an initial thickness of 1 5 mm are used and subjected to one or several conventional bulk forming operations. Tion to sheet metal forming at the same time eliminating its disadvantages as far as possible. Thicknesses can vary significantly. Simulation of titanium cup drawing in qform.

For example processes such as forming operation small radius bending and ironing of small sized parts. Upsetting of sheet metal. The surface area to volume ratio of the starting metal is relatively high. Classification of basic sheet forming processes bending deep drawing shearing.

5 are discussed including detailed process analysis and potential industrial applications. This includes special meshing technologies for sheet metal structures optimized element formulations and specific functionalities. The pri mary use of the tenn bulk deformation is to distinguish it from sheet fonning processes. Sheet bulk metal forming sbmf processes are defined as forming of sheets with an intended three dimensional material flow as in bulk forming processes merklein et al.

In the next sections the different sheet bulk metal forming processes illustrated in fig. Specific upgrading and software adjustments allow the requirements of sheet metal forming simulation. Bulk deformation processes and sheet metal working processes. Extremely thin sheets are considered foil or leaf and pieces thicker than 6 mm 0 25 in are considered.

Upsetting is a typical cold bulk forming operation with linear tool motion and a controlled reduction of at least one workpiece dimension between two tools. The paper defines this new class of sheet bulk metal forming processes gives an overview of the existing processes belonging to this class.