Bendability Of Sheet Metal

Formability of a sheet metal in stretch bending operation when limited by localized necking is represented by forming limit diagram fld.

Bendability of sheet metal. Mark a bend line and place the sheet metal on the edge of your bench. Bendability is related to the more general term of formability discussed in the sheet metal forming section. The bending force is proportional to the thickness of the sheet metal and inversely proportional to the width of the notch of the lower die. Clamp the wood on top of the metal to the workbench.

Bendability of sheet metal is the characteristic degree to which a particular sheet metal part can be bent without failure. The bendability of sheet metals often refers to the minimum die radius over which a sheet with a given thickness can be bent successfully without defects. In the actual bending the thickness of the sheet metal is set and the width of the lower die slot is selected according to the thickness of the sheet metal. Experimental determination of the fld involves considerable testing and evaluation of test data.

If you want a sharp 90 bend tap along the crease with a mallet. The process is limited by the occurrence of shear bands thickness inhomogeneties microcracks and ultimately fracture on the convex surface of the bent sheet. In sheet metal forming localized necking and fracture are two primary modes of failure.