Safe operation of medium frequency and power frequency induction heating equipment

(1) Medium frequency induction heating frequency conversion equipment, including generator type and silicon controlled type. The Z high voltage of the intermediate frequency current can reach about 750V, and the safe electricity rules must be observed when using it (the power of the frequency converter is generally greater than 100kW). If machine room shall be well ventilated and kept clean, tidy and dry. If equipment can only be started up and operated by more than two persons, and the person in charge of operation shall be designated. Operators shall be familiar with and abide by the operating procedures of intermediate frequency equipment, and wear the specified protective articles. The workpiece shall be removed of burrs, iron filings and oil dirt, otherwise it is easy to produce arc striking. During operation, it is also necessary to prevent the workpiece from contacting the sensor to produce arc striking. When using medium frequency quenching machine tools, attention shall be paid to the safety operation procedures for electrical, mechanical and hydraulic transmission. The equipment shall be repaired by a specially assigned person. Before repair, discharge the capacitor with a discharge rod. Live repair is strictly prohibited.

(2) Power frequency induction heating equipment is used to heat, quench or normalize large workpieces with industrial electric frequency, low voltage and large current. The rules for safe use of electricity shall be observed during use.
In order to prevent large workpieces from cracking and injuring people during power frequency induction heating, the operating procedures for power frequency heat treatment and corresponding process procedures for large workpieces must be strictly observed during operation. Large workpieces shall be subject to ultrasonic flaw detection one by one. Workpieces with white spots, serious segregation, looseness and other defects found after flaw detection shall not be heated with power frequency equipment. Burrs, iron filings and oil stains shall be removed from the workpiece to prevent arcing. During the production operation, the person in charge must be appointed, and the operator must be familiar with and comply with the operating procedures of power frequency equipment.
The workpiece shall be provided with a lifting hole or a suitable clamping table to ensure the safety of workpiece handling and lifting. When operating the power frequency heating machine tool, pay attention to the safe use rules of electrical and mechanical transmission.