| 摘要 |
PURPOSE:To obtain a good formed product having uniform finish in a titled working method for making hemming on the end of specified panel work by forming the basal part of folded flange parts to nearly cylindrical shape. CONSTITUTION:A flange part F is formed by bending at the end of a panel work W as in the past. However, the radius of curvature R1 of the basal part is made equal to the radius of curvature R at the time of completion of hemming work mentioned later. Then, the work W is placed on an insert punch 6, fixed with a pad 7. A sectional die 8 is advanced from the horizontal direction, and the basal part of the flange part F is bent and formed to a nearly semicircular sectional from by an arc-shaped projection 6a and an arc-shaped forming face 8a. After this preliminary bending work, the work W is inverted, and placed on die 1A together with other panel work W2, and hemming worked by a die 11 provided with an arc-shaped forming face 12a and a stepped part 12b. Thus, a formed product in which a cylindrical part Q is formed is obtained. |
