Pressure fault detection system and pressure fault detection method for servo press

Abstract

The invention belongs to the technical field of press detection, and in particular relates to a pressure fault detection system and a pressure fault detection method for a servo press. A threshold value range of a pressure value of the press and a torque value of a motor is obtained by taking the pressure value of the press and the torque value of the motor as a pressure fault detection index, andreal-time fault detection and real-time fault alarm are achieved by comparing a detection value of the press and an output torque value of a servo driver measured by a pressure sensor.

Description

technical field [0001] The invention belongs to the technical field of press detection, and in particular relates to a pressure fault detection system and method of a servo press. Background technique [0002] At this stage, in the industry of servo presses, pressure faults are mainly detected through the feedback values ​​of pressure sensors installed on the four side columns of the servo press. The detection principle is as follows: When the control mode is position control, deformation will occur on the four side columns of the press during the downward process of the slider of the press, and the pressure sensors fixed on the side columns will also deform to varying degrees. The pressure sensor detects the deformation of the strain gauge to generate a corresponding pressure value signal, which is transmitted to the control system through the signal detection circuit. During the forming process of the entire press, the pressure is the highest at the bottom dead point. Mos...

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Problems solved by technology

The disadvantage of the above two existing methods is that it can only detect the failure of the maximum pressure exceeding the nominal pressure of the press at the bottom dead center, but cannot detect the abnormal pressure state in other stroke ranges

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