UHF sensing devices | frequency induction equipment | Qingdao days Run High Frequency (view) Run by High Frequency Electric Co., Ltd. Qingdao days. UHF sensing devices | frequency induction equipment | Qingdao days Run High Frequency (view) is High Frequency Electric Co., Ltd. Qingdao Tianrun (www.gaozhoubo.com.cn) launched this new upgrade, the above picture is only for reference, please call Phone or pictures on this page, for the latest information, contact: Yan Lidong. Principle of the workpiece into a high-frequency inductor (coil) inside, when the sensor is passed through an alternating current of a predetermined frequency, i.e. around the alternating magnetic field. Electromagnetic induction of the alternating magnetic field of the induction currents generated in the closed workpiece - vortex. Induced current distribution in the cross section of the workpiece is not uniform, the workpiece surface is very high current density gradually decreases inwardly, this phenomenon is called the skin effect. Workpiece surface high density currents of electricity into heat, so that the surface temperature rises high frequency induction equipment prices, namely to achieve surface heating. Current higher the frequency, the workpiece surface and internal current density difference is greater the heating layer thinner. Rapid cooling in the heating layer temperature exceeds the critical temperature of the steel post, you can achieve surface hardening. According to the frequency of the alternating current level of induction heating heat treatment can be divided into UHF, HF, super audio, frequency, frequency 5 classes. ① ultra-high frequency induction heating heat treatment used in the current frequency up to 27 MHz, the heating layer is extremely thin, only about 0.15 mm, can be used for surface hardening thin circular saws and other complex shape of the workpiece. ② high frequency induction heating heat treatment used in the current frequency is usually 200 to 300 kHz, the heating layer depth of 0.5 to 2 mm high frequency induction equipment, and can be used for surface hardening gears, cylinder liners, cams, shafts and other parts. ③ super audio induction heating current frequency used for the heat treatment is generally 20 to 30 kHz frequency induction equipment manufacturers, small modulus gear with ultra-audio frequency induction heating current, the heating layer generally distributed along the tooth profile, pure fire after use better performance . ④ heat induction heating current frequency used is generally 2.5 to 10 kHz frequency induction equipment, heating layer depth of 2 to 8 mm, and more for big modulus gear, larger diameter shaft surface and other parts of cold roll quenching. ⑤ frequency induction heating heat treatment used in the current frequency of 50 to 60 Hz, a heating layer depth of 10 to 15 mm, can be used for surface hardening of large workpieces.