Asynchronous double-frequency induction heating numerical simulation method based on specially-shaped inductors

Abstract

The invention discloses an asynchronous double-frequency induction heating numerical simulation method based on specially-shaped inductors, and belongs to the technical field of asynchronous double-frequency induction heating. The method is based on ANSYS finite element numerical simulation software, medium-frequency and high-frequency inductors in different shapes are used for heating a chain wheel, and the nonuniformity of asynchronous double-frequency induction heating temperature distribution of the chain wheel is reduced; asynchronous double-frequency heating simulation of the chain wheel under the specially-shaped inductors is realized with a unit birth-death method, and the calculation time is shortened in a modeling mode that overlapped parts among sub-models are still kept independent from one another; switching of medium-frequency and high-frequency induction heating working conditions is achieved under the same model, the tooth profile temperature difference is used as the basis of medium-frequency and high-frequency heating switching, a traditional simulation method based on heating time is abandoned, more accurate heating control directly based on a targeted target is achieved, the precision and efficiency of medium-high frequency switching control are greatly improved, and simulation is closer to real production.

Description

technical field [0001] The invention belongs to the technical field of asynchronous dual-frequency induction heating, and in particular relates to a numerical simulation method for asynchronous dual-frequency induction heating based on special-shaped inductors. Background technique [0002] At present, in order to solve the problem of high-quality induction heating on the surface of complex-shaped workpieces, German Eldec Induction Heating Equipment Co., Ltd. and university researchers have developed a synchronous dual-frequency induction heating technology, which has obtained a relatively uniform heating layer on the surface of complex-shaped workpieces. Aiming at the technical blockade and the high price of dual-frequency equipment, although China has developed an asynchronous dual-frequency heating method based on the same kind of inductor, which has obtained a more uniform heating layer than single-frequency induction heating, but this method is not as good as the foreign...

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Problems solved by technology

Aiming at the technical blockade and the high price of dual-frequency equipment, although China has developed an asynchronous dual-frequency heating method based on the same kind of inductor, which has obtained a more uniform heating layer than single-frequency induction heating, but this method is not as good as the foreign synchronous dual-frequency heating method. Compared with induction heating technology, it still has the following disadvantages: when the same kind of inductor is used to perform asynchronous dual-frequency heating on the workpiece, the temperature inhomogeneity of the heating layer obtained is still large, and the heating quality is low; for large-module gears, heavy-duty chains For workpieces with complex shapes such as wheels whose surface shape changes greatly, the intermediate frequency frequency needs to be reduced extremely low to obtain a more uniform heating layer temperature at the bottom and top of the tooth, but this will reduce the heating efficiency, and the heating time will be too long, resulting in tooth hardening The phenomenon

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