Abstract
In this study, electromagnetic-force-assisted laser bending and straightening process is proposed, in which the external force is applied by a controlled force generated by an electromagnet. The process was found suitable for laser assisted bending and straightening. The experiments as well as simulations indicated that a large bend angle can be obtained by controlling the electric current and air gap between electromagnet and workpiece. A good agreement between simulation and experimental results was obtained. Edge effect was very less in case of strips that got attached with the magnet during laser bending. The spring-back effect was very less at high laser power, low scan speed and high current. The laser irradiated region had higher micro-hardness than base material. The micro-hardness of laser irradiated region depended on laser power, scan speed and magnetic force of attraction. Straightening of mechanically bent strip was also carried out. Results indicate that use of an electromagnet with laser irradiation is an effective way to straighten bent strips.
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