Analysis of the stress state analysis shows that the high-frequency machine stress state, the pressure in the rough edges of the mold value σs ln (r + h) / r. Reached when the r / h value α1 and yield stress σs phase and on values. Thus the high-frequency welded pipe technology, rough stretch resistance in the curved section significantly weaker. Instead hardening effects are due to bending caused these segments, its more hardened flat segment generated quickly. According to r / h value of high frequency welded pipe supply is one of the dominant factors. Before carrying capacity determination section blank punch and die of the minimum allowable radius Rmin should proceed from the following conditions, i.e. not in contact with the mold segments into the plastic blank in a stretched state is subjected to contact pressure should disappear. The resulting value Rmin than usual bending nearly 50% larger, for low carbon steel, Rmin value does not exceed the thickness value of the material. The inclined wall in the test sample limit angle of nearly 45 °, the results of this can be confirmed by test pressing profiles. * High frequency induction heating machine IGBT amplifier, dual regulation and soft switching resonant frequency automatic tracking system, MOSFET devices and unique inverter technology, high frequency stable operation. High frequency induction heating equipment works constant current and power control function, which greatly optimizes the metal heating process. * High-frequency induction heating machine, under the same conditions than conventional high-frequency heating equipment tube and save 50% frequency welded pipe prices, no high-frequency radiation, no high-frequency jamming. Reducing the power load and power capacity, with 100% of full load design, high frequency induction heating machine can continuously twenty-four hours of uninterrupted work. * High-frequency induction heating machine high frequency welded pipe, with automatic heating, insulation, cooling function is set three periods of time, help to improve the quality of high-frequency induction heating machine heating simplify manual operation. Power and frequency can select the high-frequency induction heating machine power according to high frequency, the higher the frequency, the more shallow depth of heating, the lower the better high-frequency frequency diathermy. Induction heating machine 1 ~ 20KHZ the frequency frequency automatic tracking frequency welded pipe price |. High-frequency welded | Qingdao Tianrun High Frequency provided by Qingdao Tianrun High Frequency Electric Co. Qingdao Tianrun High Frequency Electric Co., Ltd. (www.gaozhoubo.com.cn) strong, credible, in Qingdao, Shandong packaging related equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Qingdao Tianrun High Frequency and you hand into the brilliant, for a better future!