Under the support of Hong Kong Innovation and Technology Fund, we have developed a computer-based Stamping Operation Monitoring and Diagnosis System (SOMS) for monitoring metal stamping operations. SOMS is an intelligent, reliable, and cost effective on-line monitoring system specifically for stamping operations. It has the following features:
It is an intelligent monitoring system. Every time a die is set, it can automatically learn alarm threshold and diagnose the root cause of the defects. It also can alert users when malfunctions such as slug-pulling, wrinkling, thickness change of raw material, mis-feeding and double-thickness etc. occur. Since the product defects are minimized, the press and mould will be protected accordingly.
It is a stand-alone a single board computer. It can control several stamping machines via network communication system during different process, record information (e.g., press operating time, number of shots, idling time and etc.) for industry engineers' analysis, and improve their product quality and mould design. It is also possible to use one unit to monitoring multiple pressers, or uses a standard PC computer (Minimum requirement: CPU 486—133MHz) to replace the single board computer.
It is a reliable monitoring system. The installation is very easy and it functions equally well for all kinds of C frame cross-shaft press and column frame hydraulic press. The system uses strain sensors mounted onto the frame of the press. It is robust against various kinds of disturbances such as oil, chips, dusts, and the vibration of the nearby press. It has a user-friendly interface with both Chinese and English display on large LCD screen making the operation easy.
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