MT U-shaped magnetizer device

Abstract

The invention is suitable for the technical field of magnetization flaw detection, and provides an MT U-shaped magnetizer device which is characterized in that a first flaw detection assembly comprises a first red copper bar set and a second red copper bar set which are arranged in parallel, a second flaw detection assembly and a third flaw detection assembly are symmetrically and obliquely arranged at the two ends of the first red copper bar set and the two ends of the second red copper bar set correspondingly and fixedly connected with the first red copper bar set and the second red copper bar set, and the cross sections of the first flaw detection assembly, the second flaw detection assembly and the third flaw detection assembly are in a U shape. By adopting the longitudinal U-shaped magnetizer device, three-dimensional magnetic field magnetization in the X direction, the Y direction and the Z direction can be achieved, and meanwhile, polarity-changing attenuation demagnetization can be tangentially carried out on the inner hole end face, the sharp corner, the periphery of a hole, the abrupt change part of the cross section, steps, the edge of a plate wall and magnetic fields deep in different directions of the special-shaped part through the longitudinal U-shaped coil.

Description

technical field [0001] The invention belongs to the technical field of magnetization flaw detection, in particular to an MT "U" type magnetizer device. Background technique [0002] Magnetic particle inspection is to use its discontinuity near the surface defect of steel parts to generate leakage magnetic field on the surface of the workpiece to attract magnetic powder to form magnetic particle accumulation-magnetic marks at the defect, observe, evaluate and analyze under appropriate lighting conditions to achieve non-destructive testing. Purpose. [0003] The operation of magnetic particle flaw detection: cleaning, spraying, rotating, magnetizing, observing, evaluating, demagnetizing, cleaning, painting, etc. At present, the longitudinal magnetization of domestic flaw detection equipment is magnetized by longitudinal coil or cable winding method within φ350. The general magnetization range is the diameter of the coil, and the direction of the magnetic field is generally pe...

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Problems solved by technology

[0003] The operation of magnetic particle flaw detection: cleaning, spraying, rotating, magnetizing, observing, evaluating, demagnetizing, cleaning, painting, etc. At present, the longitudinal magnetization of domestic flaw detection equipment is magnetized by longitudinal coil or cable winding method within φ350. The general magnetization range is the diameter of the coil, and the direction of the magnetic field is generally perpendicular to the cross-section of the coil. For the end face of the inner hole, sharp corner, around the hole, sudden change in section, step and edge of the board wall, or the outer surface of the special-shaped part, the direction changes, the general traditional Coil flaw detection is segmented flaw detection, especially when L / D<2, the parts need to be connected in series for flaw detection, which is labor-intensive and low in efficiency. At the same time, when testing forgings with strict requirements, it is required to detect deep defects hidden under the skin. Therefore, three-phase full-wave rectifier detection is used. The general longitudinal (or circumferential, longitudinal AC demagnetization) demagnetization method cannot meet the standard demagnetization, so it cannot meet the normal work requirements.

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