Abstract
A geometrical base parameter is investigated to determine the effect on a bending quality of a thin sheet metal for a roll forming process. This parameter is usually used as a criterion for the quality control of incoming materials for the bending process. This study was conducted by using a FEM simulation. The determination of the geometrical base parameter is considered as an appropriate and unique characteristic for each type of materials. To find this geometrical base parameter the dimensions of the workpiece must be measured while loading. The sensitivity of the bend allowance of a sheet metal is dependent on this geometrical base parameter. The high geometrical base parameter is led to indicate the elongation and the strength of the material. The principles of the geometrical base parameter are dependent on several factors, such as the bending angle, bending radius, material thickness, bend allowance, bending types and mechanical properties of materials. The outcomes of this study could provide the information used to enhance the bend quality of the sheet metal.
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