Bearing ring demagnetizing device

Abstract

The invention relates to the field of bearing machining, in particular to a bearing ring demagnetizing device. A sensor in the bearing ring demagnetizing device is used for detecting an external bearing ring signal and transmitting the signal to a CPU. A data input and display unit inputs demagnetizing curve parameters to the CPU and displays demagnetizing parameter information. First and second drive circuits receive the demagnetizing curve parameters of the CPU and control current changes of first and second layer coils respectively, so that changes of a demagnetizing magnetic field are controlled for demagnetizing. The included angle between the winding direction of the second layer coil and the winding direction of the first layer coil ranges from 20 degrees to 45 degrees. The number of turns of the second layer coil is 30-40% that of the first layer coil. The first layer coil participates in the whole demagnetizing process, the second layer coil participates in demagnetizing only at the last stage of demagnetizing, namely during the period not exceeding 25% of the total time, and the second layer coil assists in eliminating the final residual magnetism intensity of bearing rings. The bearing ring demagnetizing device can well solve the problem of too much residual magnetism caused by incomplete demagnetizing of bearing ring demagnetizing equipment, is simple and small in structure, convenient to assemble and good in demagnetizing effect, and the residual magnetism of the device is smaller than 0.1 mT.

Description

technical field [0001] The invention relates to the field of bearing processing, in particular to a demagnetization device for a bearing ring. Background technique [0002] The surface of the bearing ring after grinding is often stuck with iron filings and other sundries, which must be completely cleaned before use to prevent damage to the equipment. Due to the extensive use of magnetic chucks and other devices during the grinding process, the surface of the bearing ring is magnetized, which makes iron filings and other debris adhere firmly and is not easy to be cleaned. Therefore, it must be demagnetized and ensure its residual magnetism. It is less than a certain value (0.3mT stipulated in GB). With the development of industrial technology, the value stipulated by the national standard has sometimes been difficult to meet the processing requirements, and the traditional solution produces a large remanence, especially for thinner ones. The residual magnetism at the edge of...

AI Technical Summary

Problems solved by technology

[0002]The surface of the bearing ring after grinding is often stuck with iron filings and other debris, which must be completely cleaned before use to prevent damage to the equipment

Due to the extensive use of magnetic chucks and other devices during the grinding process, the surface of the bearing ring is magnetized, which makes iron filings and other debris adhere firmly and is not easy to be cleaned. Therefore, it must be demagnetized and ensure its residual magnetic strength. It is less than a certain value (0.3mT stipulated in GB). With the development of industrial technology, the value stipulated by the national standard is sometimes difficult to meet the processing requirements, and the traditional solution produces a large remanence, especially for thinner ones. The residual magnetism at the edge of the ultra-thin ferrule is often too large, and in many cases even the basic requirements of the national standard are difficult to meet, resulting in difficulty in washing, and subsequent use on the equipment will seriously affect the performance of the equipment

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