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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 blade eddy current flaw detection and sorting machine

Automatic blade eddy current flaw detection and sorting machine

  • Classification:Automatic blade eddy current flaw detection and sorting machine
  • Number of visits:second
  • Date of issue:2021-04-24 10:20:26
  • 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.

全自動葉片渦流探傷分選機

運用導體的渦流開展各種各樣檢驗,是一種電流的磁效應查驗,其典型性運用是渦流探傷檢測。這兒概述對有導電率的產品工件表面裂痕等渦流探傷設備缺點的查驗。

(1)渦流的特點

并以觸碰方法對帶磁體和導電性非磁性體(鋁合金型材、不銹鋼板、銅等)材料的產品工件開展探傷檢測。除裂痕之外,運用該渦流還可對下邊各種各樣缺點開展探傷檢測:表面的鍛造裂縫和孔、切削燙傷、刮痕、黑皮膚殘余、部分材料變化或存有臟東西(材料歸類查驗)及部分強度變化(原材料構成和構造的查驗)等。

(2)渦流的基本原理

交流電路經線圈,在軸承渦流探傷生產廠家檢測周邊造成磁場(用磁力線表明),并對周邊的導體造成功效。因電磁線圈磁場是變化的,根據導體的磁場在方位和標值上面隨時間而變化。這時候,導體阻攔磁場變化造成電,稱之為電流的磁效應。導體中造成的靜電場,在變化的導體磁力線功效下造成電流量(交流電流),依據該電流量的樣子稱其為渦流。造成于導體中的渦流,其尺寸與遍布狀況伴隨著頻率、導體的傳導率、透磁率,實驗體的規格、樣子,電磁線圈的樣子、規格、電流量及與導體的間距,及其機殼的樣子不一樣而變化。

板塊產品工件表面如果有裂痕,渦流將曲折離去有裂痕的缺點區流動性(降低了電磁線圈的負荷),其結果使磁場變化。那樣有無裂紋等渦流探傷檢測造成的導體特性的變化及渦流的遍布狀況隨著而變,渦流造成的磁力線也跟隨變化。因而要是檢驗出磁力線的變化,就能獲知是不是存有損害以及它導體的特性。


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