MACHINE FOR MAKING 3-DIMENSIONAL CURVES WITH THE SAME RADIUS OF CURVATURE, CAPABLE OF SHORTENING WORK TIME

摘要

PURPOSE: A machine for making 3-dimensional curves with the same radius of curvature is provided to reduce labor force as well as production costs.;CONSTITUTION: A machine for making 3-dimensional curves with the same radius of curvature is used for a gas storage tank of an LPG transport ship. The machine comprises an upper punch(20) and lower die(40). The upper punch is fixed to and installed at the bottom of a ram that reciprocates. The lower die is in contact with the upper punch when the ram moves down. The bottom of the upper punch and the top of the lower die have curved surfaces(21), which correspond to each other. Either the curved surface of the upper punch or that of the lower die is protruded in a round shape. The machine reduces production costs. The machine uses additional heating and cooling system, and does not use a thermal deformation method.;COPYRIGHT KIPO 2010