| 摘要 |
PURPOSE:To make the movement of a work exactly follow up the stroke of the high-speed motion of a press machine by providing feed bars for the work having the specific construction to a transfer device for the press machine to be driven by AC servocontrol motors. CONSTITUTION:The work is subjected to press working by dies provided between a ram 2 and a bed 4 when the ram is vertically driven by a driving shaft 1 consisting of a crank shaft. The work is moved forward and backward by a motor 6 for the feed bars to be individually driven by the AC servocontrol motors and the feed bars 5, 5 are vertically moved by motors 15, 16 for lifting. The feed bars 5, 5 are further moved by motors 9, 10 for clamping so as to attached and detach to and from each other. The press working motion of the work and the movement and stop of the work by the feed bars 5, 5 are exactly synchronized at a high speed by synchronizing the driving of the above- mentioned motors 6, 9, 10, 15, 16 and the press motor 3 for moving the working ram, by which the press molding efficiency is improved. |
