Laser forming is a non-contact machining technique for metallic
materials that has mainly been used for bending thin metal sheets. Because
non-contact machining does not exhibit spring-back, laser forming can be used
for high-precision bending. In this study, we tried to use laser forming for
fabricating small, thin wire parts. The effects of laser irradiation parameters
such as pulse width, peak power, and oscillation frequency, were carefully
examined. The irradiated wires were pre-processed and thereafter subjected to
sectional SEM-based structural analysis. From the analysis, we confirmed that
wire bending is induced by an intra-wire temperature gradient. In addition, we
propose a multi-irradiation technique for enhancing the stability of bending and
obtaining large bending angles. The effect of this technique was also
investigated by sectional and heat conduction analyses.
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