| 摘要 |
A method for press forming characterized in that a hole is punched in a blank for a pin for fixing hatch loop, then a detail development is cut down according to the its contour, annealed to the required hardness, after annealing the blank is barreled and feed the blank to a bending die and across the metal fibers at 90° to the blank horizontal plane, ears are formed after which mounting holes are cut on a flat part of a pressed part. Ears are formed in the bending die of at least two mirror disposed blanks. A device for press forming holder of a hatch loop of a freight car comprises a punch 1 mounted at an upper plate 2, a matrix 3 mounted at a lower plate 4 and a holder 5 made up of different sections at the horizontal surface of which detail blanks 6 and supports 7 are arranged and a pusher 8. |
