Patent ID: 9156073
Filing Date: 2015-10-13
Classification: B21C,B21D

Abstract:
1. A forming apparatus, comprising: a shoe block train including a plurality of shoes, each of the shoes being formed with a concave die, and a cross-sectional shape of the concave die, in a longitudinal direction of a material to be formed, at its outward surface being an arc having a radius of a first virtual circle so that the cross-sectional shape extends along a part or all of the peripheral shape of the target cross-section of the material to be formed by the apparatus; and at least one turning unit, each of which having an endless track on which the shoe block train moves, wherein the shoes come in contact with and move synchronously with the material in a forming area during movement in the longitudinal direction of the material, and wherein a portion of the endless track in the forming area defines an arc having a radius of a second virtual circle having a center of curvature identical to a center of curvature of the first virtual circle.