A Study on the Forming of a Tetragonal Cup with the Acute and Obtuse Corners

모서리가 예각과 둔각인 4각용기의 성형에 관한 연구

A trapexoidal cup of corner angles, 72。 and 102。 has been drawn to 45mm in depth. Strains on the corner flange with an acute corner angle have been compared with those on the corner flange of a square cup and those on the corner flange with an obtuse corner angle respectively. The result has shown that the strains of an acute corner angle have been relieved more than those of a square cup in case of the same conditions except of the corner angles.