Magnetizer of large gear ring workpiece magnetic particle flaw detector

Abstract

The invention relates to a magnetizer suitable for a large gear ring workpiece magnetic particle flaw detector. The magnetizer is mainly composed of an opening and closing closed-circuit magnet yoke and an opening and closing square coil, wherein the opening and closing closed-circuit magnet yoke is composed of a line-shaped magnet yoke and a U-shaped magnet yoke; the U-shaped magnet yoke is provided with an exciting coil; the line-shaped magnet yoke is supported on a frame through a sliding block and a guide rail and is driven by an air cylinder to be combined with and separated from the U-shaped magnet yoke; the opening and closing square coil is composed of a line-shaped conductor and a U-shaped conductor which are meshed through a cone-shaped contact; and the U-shaped conductor is fixed on the line-shaped magnet yoke and can move along the line-shaped magnet yoke to be combined with and separated from the line-shaped conductor. The magnetizer provided by the invention has the advantages that the opening and closing closed-circuit magnet yoke and the opening and closing square coil can surround a unilateral gear ring of a large gear ring workpiece, and the large gear ring simultaneously generates magnetic fields of multiple directions such as circumferential directions, radial directions and axial directions, so that the magnetizing effect is better and more uniform, a blind region is not generated, the distribution of the magnetic fields is uniform, and the detection precision is high.

Description

technical field [0001] The invention relates to a component of a magnetic particle flaw detector, in particular to a magnetization device of the magnetic particle flaw detector suitable for flaw detection of a large ring gear workpiece. Background technique [0002] The magnetic particle flaw detection machine includes a workpiece support and rotation device, a magnetization device, a magnetic suspension spray device and an electrical control device. The magnetization device is one of the important components of the magnetic particle flaw detection machine. , to detect flaws on the surface of the workpiece to be tested. [0003] Magnetic particle inspection is the use of magnetic phenomena to detect defects on the surface and near the surface of the workpiece. It is one of the most commonly used methods in magnetic flux leakage inspection methods. When the workpiece is magnetized, the magnetic force lines on the metal surface and near surface defects are deformed, escape fr...

AI Technical Summary

Problems solved by technology

[0014] Although the above methods can realize the magnetization of the workpiece, they are all unidirectional magnetization. In particular, the circumferential, radial and axial directions of the large ring gear workpiece cannot be magnetized in all directions at the same time, and the workpiece has a magnetization dead zone.

Although the cable winding method can achieve simultaneous circumferential and radial magnetization, it is not suitable for batch detection

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