Operation method and operation control device of servo press production line

Abstract

A servo press line operation method operates a servo press line in which a servo press and a servo transfer device are disposed in a workpiece transfer direction. The servo press line operation method includes causing a transfer controller to receive a master signal that causes the servo transfer device to make a motion in synchronization with the servo press, the transfer controller controlling a motor of the servo transfer device using a motor instruction, causing the transfer controller to determine whether or not an abnormality in the master signal has occurred, and causing the transfer controller to generate the motor instruction based on a stop signal that stops the motor of the servo transfer device, instead of the master signal, when the transfer controller has determined that an abnormality in the master signal has occurred.

Description

technical field [0001] The invention relates to an operation method and an operation control device of a servo press production line in which a servo press and a servo transmission device are alternately arranged in the conveying direction of a workpiece. Background technique [0002] There is known a servo press production line in which servo presses and servo transfer devices are alternately arranged in the conveying direction of workpieces. The servo press performs stamping on the workpiece transferred by the upstream servo transfer device. The processed workpiece is sent away by the downstream servo transfer device. Here, the so-called upstream servo transmission device and downstream servo transmission device refer to the servo transmission devices arranged on both sides of the servo press along the processing direction, which are respectively arranged upstream and downstream in the workpiece transmission direction. In this way, the workpiece is sequentially transferr...

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Problems solved by technology

But this is under the premise that the main signal is normal, and it cannot be applied to the case where the main signal itself is abnormal

[0007] Here, the main signal itself is abnormal not only due to influences such as noise in the communication path, but also due to incorrect setting of the control program of the servo press production line, etc.

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