| 摘要 |
PURPOSE:To smooth operation and to increase a yield by carrying out compression forming of a bandlike material plate in the lateral direction of the plate using a pressing jig and carrying out plastic forming on a bead part at side parts of the material plate with the material plate compressed. CONSTITUTION:Lower dies 2 at both sides of a straightening die 20 are provided with slide cams 22 having a linear pressing surface 21 as the pressing jig. An upper die 4 fixed on a press ram 3 is provided with two drive cams 24 corresponding to the slide cams 22 respectively. A bead forming part 31 is formed on the straightening die 20. A straightening punch 32 generating a permanent deformation on the side of the material plate W is put on the upper die 4. The bandlike material plate W is moved from an uncoiler onto the straightening die 20 and the upper die 4 is moved down. The cams 22 are moved horizontally by an inclined plane 26 of the cams 24 to compress both sides of the material plate W. Then a permanent deformation is formed on the bead part B through the punch 32. The operation is smoothed and the yield is increased by straightening of snaking motion of the material plate W.
|
