Asynchronous dual-frequency induction heating of gears based on irregular coil

doi:10.13251/j.issn.0254-6051.2024.12.044

Abstract

Abstract: Due to the shape differences between the large and small ends of bevel gears, uneven distribution of hardening layer was caused by uneven quenching temperature distribution on the surface of bevel gears during traditional single-frequency electromagnetic heating. To solve the problem, two induction heating coil structures (hood coil and profile coil) were designed, an asynchronous dual-frequency segmented iterative cyclic induction heating method for bevel gears based on profiled coil was proposed, a physical model of electric-magnetic-thermal multi-parameter coupling was constructed and verified by induction heating test. The results show that the hood coil can heat the tooth bottom of the bevel gear well, and the profile coil can profiling heat the top and surface of the gear tooth. On this basis, the simulation results of electric-magnetic-thermal multi-field coupling for asynchronous dual-frequency induction heating show that the cycle state of asynchronous dual-frequency induction heating has a large influence on the uniformity of the temperature distribution of the tooth surface of the bevel gear. When the total time of asynchronous dual-frequency induction heating is certain, with the increase of the number of iterations, it helps to avoid excessive local temperatures, and improve the uniformity of the temperature in the direction of the imitation tooth profile and tooth width, and when the iteration cycle is up to 4 times, the temperature difference in the direction of the tooth width and the tooth profile is no longer changed significantly. As the ratio of medium and high frequency induction heating time increases, the uniformity of temperature distribution on the tooth surface of the bevel gear decreases. The asynchronous dual-frequency induction heating test on the bevel gear verifies the correctness of the constructed temperature field model.

Key words: bevel gears, induction heating, irregular coil, dual-frequency induction heating

CLC Number:

TG155.2

Liang Jianquan, Xiao Yao, Wei Yulin, Zhao Daifu, Han Yi. Asynchronous dual-frequency induction heating of gears based on irregular coil[J]. Heat Treatment of Metals, 2024, 49(12): 274-283.

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