Abstract The demand for hot stamping parts in the automobile industry is increasing due to growth of eco-friendly vehicles with improved crash safety performance and lighter weight. However, use ultra-high-strength steel cold challenging its high yield strength low elongation. Hot a widely used process overcome this challenge, but long die quenching time reduces productivity. In order address i...

Additively manufactured polymer tools are evaluated for use in metal forming as prototype and the attempt to make sheet more attractive small production volumes. Printing materials, strategies accuracies presented before tested V-bending groove pressing of 1 mm aluminum sheets. The shows that change surface topography during until a steady state is reached at around five strokes. geometrical ac...

Press-induced long-period fiber gratings exhibiting strong core-to-cladding mode coupling were formed in photonic crystal fiber. Only one resonance peak was observed over a 600 nm spectral range and the resonant wavelength was tuned over the whole range by tilting a groove plate before pressing the fiber. The resonant wavelength decreased with increasing periodicity of the grating, which was op...