Uniform self-control gear heat treatment device and method based on asynchronous double-frequency induction heating

Abstract

The invention discloses a uniform self-control gear heat treatment device and method based on asynchronous double-frequency induction heating. The device is driven by a motor, a lead screw and a nut sliding block are used as transmission parts to control lifting adjustment of a gear in real time, and an infrared temperature measurement camera is arranged on the side of the gear. The method comprises the steps that before the gear is heated, the vertical distance between the gear and an induction coil is adjusted to a set value, then the initial power of a power supply during medium-high frequency induction heating is set, then the power supply is on, medium-frequency current is connected and then high-frequency current is connected, and then the temperature difference between a tooth top and a tooth root is determined; and the temperature difference is compared with a temperature difference check value set in a computer, according to a comparison result, whether the vertical distance between the gear and the induction coil is adjusted or not is determined and whether the power of the power supply during medium-high frequency induction heating is adjusted or not is determined, and heating can be finished until the real-time quenching temperature of the gear is not lower than the set induction quenching temperature. Otherwise, the previous medium-high frequency induction heating process needs to be repeated until the requirement is met.

Description

technical field [0001] The invention belongs to the technical field of gear heat treatment, and in particular relates to a uniform self-controlled gear heat treatment device and method based on asynchronous dual-frequency induction heating. Background technique [0002] Gears are one of the most widely used transmission parts in modern machinery. The quality of heat treatment directly affects the accuracy, strength and service life of gears, and also greatly affects the manufacturing accuracy and quality stability of subsequent machining processes. Taking the bevel gear used in important fields such as aerospace as an example, its contact fatigue strength and surface hardness need more stringent requirements. Therefore, the use of electromagnetic induction technology for heat treatment of gears has been used more and more, because it is easy to precisely control the heating temperature, and has obvious advantages in changing the dislocation density of the microstructure and ...

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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