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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

Web site: www.hnlqy.com


Automatic big roller eddy current flaw detection and sorting machine

Automatic big roller eddy current flaw detection and sorting machine

  • Classification:Automatic big roller eddy current flaw detection and sorting machine
  • Number of visits:second
  • Date of issue:2021-04-24 10:31:07
  • Product overview

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


Technical parameters: flaw detection sensitivity: from the workpiece surface to the metal extending depth ≥ 0.05mm, length ≥2 mm 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 with a depth of ≥0.20mm and a length of ≥ 1mm can be detected.

全自動大滾子渦流探傷分選機

渦流探傷是利用溝通交流磁鐵線圈在金屬材料構件表面磁感應造成的渦旋碰到缺點會造成轉變的原理,來檢驗構件缺點的無損檢測技術性。利用電流的磁效應原理用勵磁電流電磁線圈使導電性構件內造成渦電流,依靠檢測電渦流探傷電磁線圈測量渦電流的變化量,進而得到 構件缺點的相關信息內容。

渦流探傷是以溝通交流磁鐵線圈在金屬材料構件表面磁感應造成渦旋的無損檢測技術性。它適用導電性原材料,包含鐵磁性材料和非鐵磁性材料金屬復合材料構件的超聲檢測。因為渦流探傷,在檢驗時不規定電磁線圈與構件密不可分觸碰,也無需在電磁線圈與構件間填滿藕合劑,非常容易完成檢測自動化技術。但金屬探傷僅適用導電性原材料,只有檢驗表面或近表面層的缺點,麻煩應用于樣子繁雜的構件.在火電站中關鍵運用于檢驗凝汽器管、汽輪發電機葉子、汽輪機轉子管理中心孔和焊接等。

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