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Magnetic power flaw detection inspection method of connecting type product

A technology of magnetic particle flaw detection and inspection method, which is applied in the direction of material magnetic variable, etc., can solve the problems that castings cannot be found, the magnetic conductivity of bed castings cannot be found, and the depth is difficult to determine, so as to improve the efficiency of power supply, prevent parts from burning, and smooth the surface cleaning effect

Active Publication Date: 2019-06-14
大成(常熟)机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages are: only applicable to ferromagnetic materials; only the length and shape of the defect can be shown, but it is difficult to determine its depth; some workpieces that affect the residual magnetism need to be demagnetized and cleaned after magnetic particle inspection
But it can't find parts in bed castings and materials with poor magnetic permeability (such as austenitic steel), and it can't find deep defects in castings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A magnetic particle inspection method for connected products, comprising the following steps:

[0032] S1 pretreatment: Use kerosene to remove oil and impurities on the surface of the parts, then wash with water and dry for later use;

[0033] S2 Magnetization: Turn the probe close to the part after being electromagnetized, so that the part is partially magnetized, and the rotation speed of the electric coil is 15r / min;

[0034] S3 Apply magnetic suspension: Apply fluorescent magnetic suspension to the magnetized area of ​​the part to make the magnetic powder adsorb to the defect, and then use a black light to irradiate the fluorescent magnetic suspension applied to the surface of the part for 12s;

[0035] S4 Flaw detection: The electromagnetic probe is used to move from the upper part to the lower part of the surface for flaw detection;

[0036] S5 Observation and recording of magnetic marks: observe the magnetic marks on the surface of parts and record the magnetic ...

Embodiment 2

[0048] A magnetic particle inspection method for connected products, comprising the following steps:

[0049] S1 pretreatment: Use kerosene to remove oil and impurities on the surface of the parts, then wash with water and dry for later use;

[0050] S2 Magnetization: Make the probe close to the part after being electromagnetized, so that the part is partially magnetized, and the rotation speed of the electric coil is 16r / min;

[0051] S3 Apply magnetic suspension: Apply fluorescent magnetic suspension to the magnetized area of ​​the part to make the magnetic powder adsorb to the defect, and then use a black light to irradiate the fluorescent magnetic suspension applied to the surface of the part for 13s;

[0052] S4 Flaw detection: The electromagnetic probe is used to move from the upper part to the lower part of the surface for flaw detection;

[0053] S5 Observation and recording of magnetic marks: observe the magnetic marks on the surface of parts and record the magnetic ...

Embodiment 3

[0065] A magnetic particle inspection method for connected products, comprising the following steps:

[0066] S1 pretreatment: Use kerosene to remove oil and impurities on the surface of the parts, then wash with water and dry for later use;

[0067] S2 Magnetization: Turn the probe close to the part after passing through the electromagnetization, so that the part is partially magnetized, and the rotation speed of the electric coil is 17r / min;

[0068] S3 Apply magnetic suspension: Apply fluorescent magnetic suspension to the magnetized area of ​​the part to make the magnetic powder adsorb to the defect, and then use a black light to irradiate the fluorescent magnetic suspension applied to the surface of the part for 15 seconds;

[0069] S4 Flaw detection: The electromagnetic probe is used to move from the upper part to the lower part of the surface for flaw detection;

[0070] S5 Observation and recording of magnetic marks: observe the magnetic marks on the surface of parts ...

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PUM

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Abstract

The invention relates to the technical field of magnetic power flaw detection, in particular to a magnetic power flaw detection inspection method of a connecting type product. The method comprises thefollowing steps of removing oil stain and impurities on the surface of a part by kerosene; then, performing clean cleaning by water; performing drying for use; after a probe is electrified and magnetized, approaching the probe to the part, so that the part is locally magnetized; exerting fluorescent magnetic suspension to a magnetization region of the part so that the magnetic powder is adsorbedonto a flaw position; then, irradiating the fluorescent magnetic suspension exerted onto the surface of the part for 12 to 18s by a blacklight lamp; moving an electromagnetic probe from the upper partof the part surface to the lower part for flaw detection; observing magnetic marks on the surface of the part; and performing magnetic mark recording. The magnetic power flaw detection inspection method of the connecting type product has the advantages that the imaging effect is good, and the detection speed is high.

Description

technical field [0001] The invention relates to the technical field of magnetic particle flaw detection, in particular to a magnetic particle flaw detection inspection method for connected products. Background technique [0002] In industry, magnetic particle flaw detection can be used for final product inspection to ensure that no harmful defects occur on the surface of the workpiece after various processing procedures (such as welding, metal heat treatment, grinding). It can also be used for the inspection of semi-finished products and raw materials such as bars, billets, forgings, castings, etc., to find the original surface defects. Railway, aviation and other transportation departments, smelting, chemical industry, power and various machinery manufacturing plants, etc., often use magnetic particle inspection for important steel parts during regular maintenance of equipment to find defects such as fatigue cracks during use. Prevent catastrophic accidents in the continue...

Claims

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Application Information

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IPC IPC(8): G01N27/84
Inventor 张琛顾静芬李桂珍顾健
Owner 大成(常熟)机械有限公司