Induction quenching device and quenching method thereof

Abstract

The invention relates to an induction hardening device and a quenching method thereof, which include a base, a fixing device, a bearing, a control device, a heating device, a cooling device, a hardness measuring device and a shaft cap, the base is placed on the ground, and the fixing devices are respectively arranged on the base The first end and the second end of the control device, the rack in the control device is inserted into the socket on the measuring fixed ring, and the heating device, the cooling device and the hardness measuring device are inserted and fixed in the heating fixed ring, the cooling fixed ring and the measuring fixed ring respectively. On the outer rod, and the second end of the outer rod is provided with a shaft cap. The present invention introduces on-line microhardness measurement, makes the process of determining cooling parameters on-line and continuous, and can continuously change parameters on-line, improves the efficiency of trial and error in the production process, and reduces trial and error and processing costs; at the same time, large-scale processing Surface regionalization can achieve independent control of multiple small processing surfaces, which can greatly improve the phenomenon of uneven performance after heat treatment and improve the quality of heat treatment.

Description

technical field [0001] The invention belongs to the technical field of induction heat treatment, in particular to an induction hardening device and a hardening method thereof. Background technique [0002] The service life and quality of bearing parts depend on the contact fatigue life, strength and dimensional stability of the parts themselves. Heat treatment can change the microstructure of steel and eliminate various defects after processing, which is an important way to improve these properties. Induction heat treatment has the advantages of high efficiency, environmental protection, energy saving, etc., so the application of induction heat treatment is more and more extensive. However, the research found that when heat treating the inner surface of large bearing parts, there are the following problems in the process: when determining the quenching parameters of induction heat treatment, the whole part is usually trial and error, and the process is often cumbersome, tim...

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Problems solved by technology

However, the research found that the following problems exist in the process of heat treatment of the inner surface of large bearing parts: when determining the quenching parameters of induction heat treatment, the entire part is usually trial and error, and the process is often cumbersome, time-consuming and costly ;Due to the skin effect of the induced current, when heating a part with a large area, it will cause uneven heating. When the same surface is heated, the temperature near the two sides is higher, and the middle is lower. The temperature difference between the heating surface is large, which seriously affects the quality of heat treatment.

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