| 摘要 |
PURPOSE:To perform a press bending with making the motion of a metal die at higher speed without using a core by forming the inner side contact face in opposition to the motion direction of the punch for contact and by bringing the outer side contact face to the inner side contact face by the punch to support the forming part of the inner side contact face. CONSTITUTION:The bending part A of one part is bent at right angles and also the bending part B of another part is bent at right angles and the bending part C to locate at the inner side thereof is bent in acute angle, as per the figure (a) on the forming part of the end parts 5, 6 of the phosphor bronze plate removing the unnecessary part with punching. The bending part D to locate at the inner side than the part A as per the figure (b) is bent in the obtuse angle nearer to the right angle than the obtuse angle of the part C then. The parts D and C are bent at right angles and the tip of the part B is pressed and the contact face E thereof and the contact face F of the tip of the part A are abutted as per the figure (c). Thereafter the semi- fabricated item forming the semi-fabricated terminal being placed on the center projecting part of a die 11, namely end parts 5, 6 as per the figure (b) is pressed by punches 15, 16 to bend the part C and D at right angles and the terminal 1 having loop shaped sections 5, 6 is completed. |
