The development status of cold crucible vacuum induction suspension melting equipment is described, and its application and composition are briefly introduced. The logic control and process control of vacuum levitation smelting process between PLC and touch screen of upper computer are analyzed. The system can meet the technical requirements of different smelting processes and the optimal control state. As a human-computer interaction interface, touch screen is more simple, safe and convenient in use, installation and maintenance.<br>
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