The study of Parameter of L-Bending Wiping Process Causing Spring Back by Simulating Finite Element
DOI:
https://doi.org/10.14456/rmutlengj.2020.9Keywords:
Spring-Back, L-Bending Process, Finite ElementAbstract
Bending is an important process for assembly lines in the industrial sectors. Particularly, when there is a defect on the work piece, the employee has to waste time decorating before the next production line delivery. The main defect is the spring back of the metal sheets. Therefore, this research has studied the spring black of different types of metal sheet, which are stainless steel material grade SUS304, structural steel SPCC grade and aluminum grade AA6016, thickness 1 mm, by changing the variable of the radius to be in the range from 0.25t to 5.5t 1t, and set the mold gap in the range from 0.25 t to 1.25t, by using the finite element method on the wiping die to analyze the bending angle and the spring return coefficient. The result shows that yield strength affects the spring return of the material and the die radius is directly proportional to the spring. When considering the mold gap, it is found that the narrow mold gap causes less spring back than the wider mold. The spring return coefficient of stainless-steel decreases when the ratio of die radius to the thickness of workpiece increase. The simulation of using finite element produced results consistent with the real experiment
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