Magnetic powder inspection apparatus

A technology of magnetic particle flaw detection and current coil, which is applied in the direction of material magnetic variables, etc., can solve the problems of poor consistency of manual winding, unsuitable for batch inspection, cumbersome manual winding, etc., and achieve the effect of good and reliable contact, increased flexibility, and uniform magnetic field distribution

Active Publication Date: 2011-09-28
盐城东车科技有限公司
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  • Description
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AI Technical Summary

Problems solved by technology

Its disadvantage is that manual winding is cumbersome, and the consistency of manual winding is poor, the work efficiency is low, and it is not suitable for batch detection

Method used

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  • Magnetic powder inspection apparatus
  • Magnetic powder inspection apparatus
  • Magnetic powder inspection apparatus

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Experimental program
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Effect test

Embodiment 1

[0027] Such as figure 1 As shown, the workpiece to be detected is a ring-shaped workpiece with a diameter of 1250mm, a thickness of 210mm, and an inner hole of 230mm, such as a locomotive wheel, a wheel center and other ring-shaped workpieces. The produced fork-shaped current coil 7 has a fork-shaped shape, and the projection of each turn is U-shaped. Two groups of fork-shaped current coils 7 are respectively fixed on the inside of two epoxy resin plates with a thickness of 15mm on both sides of the workpiece to be detected. , the epoxy resin plate is connected with the movable mechanism of the flaw detection device through the fixed seat 1, which not only plays a role of fixing but also plays the role of inter-turn insulation. The ring current coil 3 is also fixed with an iron core detecting magnetic bar 2 on the fixing base 1 . The fork-shaped current coils 7 on the left and right sides are connected through the terminal 4 on the outer diameter surface of the workpiece to b...

Embodiment 2

[0029] The workpiece to be inspected is an extra large annular workpiece with a diameter of 2530mm, a thickness of 110mm, and an inner hole of 1850mm, such as the inner and outer rings of the pitch bearing. Fork-shaped current coil, its shape is fork-shaped, and the projection of each turn is U-shaped. Two sets of fork-shaped current coils are respectively fixed on the inside of two epoxy resin plates with a thickness of 15mm on both sides of the workpiece to be tested. The epoxy resin plate It is connected with the movable mechanism of the flaw detection device through the fixed base 1 . The fork arm length of the above-mentioned fork-shaped current coil is 80 mm, the length of the fork back rod is 850 mm, the length of the fork arm of the right fork-shaped coil is 450 mm, the length of the fork back rod is 1350 mm, and the fork tip contacts of the left fork-shaped coil are equipped with 15 mouth-shaped The bracket adopts 15 small air cylinders to drive the meshing and pressi...

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Abstract

The invention relates to a magnetic powder flaw detection device which comprises furcated current coils distributed on the positions of two end faces of a detected workpiece; the detected workpiece shows a two-surface surrounded shape by the furcated current coils; each furcated current coils in the positions of the end faces of the detected workpiece consist of a plurality of conductor wires which are radial from center to outside; the furcated current coils in the positions of the left end face and the right end face are fixed on two permanent seats of flaw detection equipment; two permanent seats can relatively move; the furcated current coils in the positions of the left end face and the right end face are connected through a wire connecting terminal which can be opened and closed; and when the wire connecting terminal is closed, the furcated current coils are connected to form a current passage. The magnetic powder flaw detection device overcomes the disadvantages of a rod-threading method in detecting a large-scale annular, disc or hollow workpiece, has an ideal magnetizing effect and an accurate and reliable detection result, and is suitable for batch detection, in particular for the detection of the annular, disc or hollow workpiece with large difference between inside diameter and outside diameter.

Description

technical field [0001] The invention relates to a magnetization device of a magnetic particle flaw detection machine, in particular to a magnetization coil of a magnetic particle flaw detection machine. Background technique [0002] Magnetic particle inspection is the use of magnetic phenomena to detect surface and near-surface defects of workpieces, and it is the most commonly used method in magnetic flux leakage inspection. The basis of magnetic particle flaw detection is the magnetic interaction between the leakage field at the defect and the magnetic powder. After the ferromagnetic material or the workpiece is magnetized, the magnetic field lines are deformed at the defects on the surface and near the surface, and escape from the surface of the workpiece to form magnetic poles and form a detectable leakage magnetic field. At this time, sprinkle magnetic powder or pour magnetic suspension on the surface of the workpiece, and the magnetic powder particles will be adsorbed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/84
Inventor 杨晓春沈育辉
Owner 盐城东车科技有限公司
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