Formability Analysis of Al 5052 in Single Point Incremental Forming

摘要

Sheet metals are used in a variety of applications, starting from simple to complicated shapes like automobile body panels. Sheet metal can be formed using punch and die. Even if the sheet metals are ductile in character, they can be formed to certain extent and beyond this, failures may happen like wrinkling and fracture. The strain at the fracture is called forming limiting starin and also it used a measure of formability. In conventional sheet metal forming which uses press tools, the limiting strain is less. To overcome this issue a new process Single Point Incremental Forming (SPIF) can be used to make proto types to accommodate design changes quickly and to have a good control in dimensional accuracy. The forming in SPIF is effected by incremental in nature hence the limiting strain of this lies above the limiting strain of conventionally formed materials. These enhance the limiting strain during the incremental forming process. In this work, SPIF was carried out on Al 5052 alloy sheets and forming limit was determined by experimentally and forming limit diagram which is a unique one for SPIF was also constructed.