Uniform self-controlled gear heat treatment device and method based on asynchronous dual-frequency induction heating

Abstract

A device and method for uniform self-control gear heat treatment based on asynchronous dual-frequency induction heating. The device is driven by a motor and uses a screw and a screw nut slider as transmission parts to control the lifting and lowering of the gear in real time. An infrared sensor is installed on the side of the gear. Temperature measuring camera. The method is: before heating the gear, first adjust the vertical distance between the gear and the induction coil to the set value, then set the initial power of the power supply for medium and high frequency induction heating, then turn on the power supply, first pass the medium frequency current, and then convert to high frequency current. , then determine the temperature difference between the tooth top and the tooth root, and compare the temperature difference with the temperature difference calibration value set in the computer. Based on the comparison results, decide whether to adjust the vertical distance between the gear and the induction coil, and decide whether to adjust the middle and high The power supply power during frequency induction heating cannot be terminated until the real-time quenching temperature of the gear is not lower than the set induction quenching temperature. Otherwise, the previous medium and high frequency induction heating process needs to be repeated until the requirements are met.

Description

Technical field [0001] The invention belongs to the technical field of gear heat treatment, and in particular relates to a device and method for uniform self-control gear heat treatment based on asynchronous dual-frequency induction heating. Background technique [0002] As one of the most widely used transmission parts in modern machinery, gears’ heat treatment quality directly affects the accuracy, strength and service life of the gears, and also greatly affects the manufacturing accuracy and quality stability of subsequent machining processes. Taking bevel gears used in important fields such as aerospace and aviation as an example, their contact fatigue strength and surface hardness require stricter requirements. Therefore, the method of heat treatment of gears using electromagnetic induction technology has been increasingly used because it facilitates precise control of the heating temperature and has obvious advantages in changing the dislocation density of the microstr...

AI Technical Summary

Problems solved by technology

However, there are also obvious shortcomings and deficiencies in the existing dual-frequency induction heating technology.

Specifically, in the existing dual-frequency induction heating technology, the heating only takes the final set temperature or heating time as the control object, and the real-time regulation of the gear tooth temperature cannot be realized during the heating process, so the heating control method is relatively rough. Moreover, it has a serious dependence on the power sensitivity of the induction power supply, and the induction power supply that meets the requirements is expensive, resulting in poor economy of gear heat treatment

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