A control method for weathering steel gear heating

Abstract

The invention relates to a heating control method for weather-resistant steel gears, belonging to the technical field of gear production. This process uses different frequency currents with different penetration depths to divide the gear teeth to be heated into three different heating areas, and uses three single-frequency power supplies to pass three different types of high frequency, intermediate frequency, and intermediate frequency to the circular coil at the same time. The frequency current is used to heat the working parts of the gear to be heated - tooth top, tooth side and tooth root. At the same time, real-time temperature monitoring is carried out on the tooth top, tooth side, and tooth root, and the temperature difference of each part is calculated. Through the temperature difference feedback of each part, the power supply heating power corresponding to each part is adjusted to achieve high precision of the gear to be heated. Gradient heating control controls the temperature difference within the temperature accuracy, reduces the production cost under the condition of meeting the production quality requirements, and obtains the best economic benefits for the enterprise.

Description

technical field [0001] The invention relates to the technical field of gear production, in particular to a method for controlling heating of weathering steel gears. Background technique [0002] Weathering steel gears are gears made of alloy steel made of ordinary carbon steel with a small amount of corrosion-resistant elements such as copper and nickel added. The advantages of atmospheric corrosion are widely used in machinery with high precision requirements and harsh climate environments. Although weathering steel materials greatly improve the physical and chemical properties of gears, it is very important to improve the quenching process of weathering steel gears in order to further improve the tooth surface strength, wear resistance and reduce stress concentration. Among the many processes in the quenching process, the quality of gear heating will seriously affect the quality of quenching. [0003] At present, in order to obtain better gear heating quality, people hav...

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Problems solved by technology

Although a small number of companies have used this technology to achieve better results in gear heating, they still have the following shortcomings: the existing dual-frequency power supply is not easy to start frequently, the accuracy of the output frequency signal is poor, and the amplitude and current of the two frequencies are different. The frequency is difficult to adjust independently and other disadvantages; compared with the single-frequency heating technology, although the dual-frequency heating reduces the temperature difference between the addendum and the tooth root during the heating process, the existing dual-frequency heating technology belongs to the rough heating stage. How to control more precisely and obtain a smaller temperature difference has not yet been resolved; dual-frequency heating technology has not been widely used in enterprises due to the high price of power supply and strict requirements on heating technology.

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