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Cixi Jingchuang Industrial Automation Co., Ltd

Contact person: Manager Tu (Sales Manager)

Telephone: 13586643385

Contact: Deng Musong

Telephone: 13506741638

The true: 0574-63571884

Mail Box: 496613547@qq.com

Address: No. 1, Lane 8, Shuiyunpu Road, Liujia Village, Xinpu Town, Cixi City, Zhejiang Province

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Automatic eddy current flaw detector for hub bearing

Automatic eddy current flaw detector for hub bearing

  • Classification:Automatic eddy current flaw detector for hub bearing
  • Number of visits:second
  • Date of issue:2021-04-24 10:16:10
  • Product overview

Key performance index

1, flaw detection sensitivity: from the workpiece surface to the metal extension depth ≥ 0.06mm, length ≥ 2mm crack, defect; When the thickness of the metal between the top edge of the crack and the surface of the workpiece is ≤ 0.2mm, the crack depth ≥0.20mm and length ≥ 2mm can be detected.

2. Leakage rate: 0%, that is, unqualified products are eliminated 100%; Misjudgment rate (wrongly judging qualified products as unqualified products)≤1%. All rejected items can be inspected once again to reduce misjudgment.

3, Detection frequency range: 100 Hz ~ 1 MHz, adjustable.

4, Band-pass filtering, center frequency 250 ~ 1 000 KHz, 8 levels.

5. Gain: Gain of each channel is 0 ~ 60 dB, adjustment amount is 1 dB/ gear.

6, phase: 0° ~ 360°, step distance is 1°.

7. Detection time: 6 seconds

Principle of Eddy Current Testing: Eddy current testing uses the principle of electromagnetic induction to excite the probe coil with sinusoidal current. When the probe is close to the metal surface, the alternating magnetic field around the coil generates induced current on the metal surface. For flat metal, the flow of the induced current is a concentric circle of coils, shaped like a vortex, called an eddy current. The eddy also generates a magnetic field of the same frequency, in the opposite direction of the coil's magnetic field. The loss resistance of the eddy current channel and the anti-magnetic flux generated by the eddy current are reflected back to the probe coil, changing the current magnitude and phase of the coil, that is, changing the impedance of the coil. Therefore, when the probe moves on the metal surface and encounters defects or changes in material and size, the reaction of eddy current magnetic field to the coil is different, resulting in changes in coil impedance. By measuring such changes with eddy current testing instruments, the metal surface can be identified with defects or other physical property changes. There are many factors that affect the eddy current field, such as the degree of coupling between the probe coil and the material under test, the shape and size of the material, electrical conductivity, magnetic permeability, and defects. Therefore, the problems of flaw detection, thickness measurement and sorting of metal materials can be solved by using eddy current principle

技術參數:探傷靈敏度:由工件表面向金屬內延伸深度≥0.05 mm,長度≥2 mm的裂紋、缺陷;對于金屬內部尚未延展到工件表面的裂紋,當裂紋上緣與工件表面之間的金屬厚度≤0.2 mm時,深度≥0.20mm,長度≥1 mm的裂紋可以檢出。





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