| 摘要 |
A METHOD OF MANUFACTURING AN ARC-LIKE FORMED PRODUCT AND AN APPARATUS FOR CARRYING OUT THE METHOD An arc-like formed product, such as bearing metal, is manufactured from a sheet of metal strip by introducing the metal strip in a tangential direction of a cylindrical forming surface of a die, bending and rolling the metal strip along the forming surface of the die into an arc shape, cutting both ends of formed metal strip at both ends of the forming surface of the die while pressing the metal strip against the forming surface of the die in a range of at least 1/20 to 1/3 of its length, transferring the formed strip piece of metal into a coining die and coining the same. An apparatus for carrying out the process to manufacture the arc-like formed product includes a forming die having a cylindrical forming surface and cutter portions on the both ends thereof, a die roller rolling and moving around the forming surface of the die, a supporting member adapted to be capable of moving toward the forming die and having loading ends with a width in a range of at least 1/20 to 1/3 of the length of the forming surface for pressing the formed metal strip against the forming surface, movable blades for cutting the metal strip in cooperation with the cutter portions, means for transferring the formed strip piece of metal into a coining die, a plunger punch for coining the formed strip piece in cooperation with the coining die and a number of cams provided on a driving shaft for driving the movable elements mentioned above respectively and successively. |
