Difference Between Bulk Forming And Sheet Metal Forming

Rolling forging extrusion and drawing are bulk forming processes.

Difference between bulk forming and sheet metal forming.

Sheet metal forming involves forming and cutting operations performed on metal sheets strips and coils. Bulk deformation refers to the use of raw materials for forming which have a low surface area to volume ratio. 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. On the word we can say the shape changes are significant.

They both involve the manipulation of metal to achieve a different size and or shape. The most typical in this group is the embedded pin transducer technique. 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. In bulk deformation processes the more important point are shape change.

Sheet bulk metal forming differences in plastic flow resulting from the plane stress conditions of sheet metal forming and the three dimensional stress conditions of bulk metal forming have long been utilized to classify metal forming processes into two different groups. Upsetting of sheet metal. 5 are discussed including detailed process analysis and potential industrial applications. Usually the initial shape is a simple one.

In summary they may be divided into the following categories. Forging and forming aren t the same however. In bulk deformation processes part of the work have low volume to area ratio on the other hand in sheet metal processes part of the work have a high volume to area ratio in sheet metal processes term press working. The surface area to volume ratio of the starting metal is relatively high.

Describe a the similarities and b the differences between the bulk deformation processes considered last week and the sheet metal forming processes looked at in this week s lecture. In the next sections the different sheet bulk metal forming processes illustrated in fig. Tools include punch die that are used to deform the sheets. Classification of basic sheet forming processes bending deep drawing shearing.

Typically metal forming processes can be classified into two broad groups. They each use a different method. A more comprehensive list applicable to other metal forming processes including bulk and sheet metal forming has been presented by schey 1983. Bulk deformation shape changes are significant work parts have a low surface area to volume ratio.

Deformation processes are important in transforming one shape of a solid material into another shape.