Online detecting device and method for two-field leakage magnetic flux of defects on steel products surface
A detection device and technology for steel products, applied in the direction of material magnetic variables, etc., can solve the problems of undetectable cracks, undetectable use, and insensitivity to depth, etc., and achieve the effects of improving product quality, facilitating detection of deep cracks, and large penetration depth
Inactive Publication Date: 2008-11-12
营口市北方检测设备有限公司
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[0005] However, this detection equipment and detection method have the following disadvantages: this detection method is sensitive to area, not to depth, and can only detect cracks with larger openings, cracks with openings smaller than 0.5 mm, and cracks covered by iron scale or without openings No cracks can be detected
Therefore, it cannot be used for detection of rough surface workpieces such as high-temperature continuous casting billets. At present, there is no such precedent in the field of high-temperature continuous casting billet detection.
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[0060] See Figure 4 , Figure 5 As shown, the on-line detection device 40 of double-field leakage magnetic flux for surface defects of steel products of the present invention includes: a stable frame 41 , a follower bracket 42 , a connecting shaft 43 , a driver 44 , a detection head 45 and a transmission rod 46 .
[0061] The stabilizing frame 41 is set as a cavity, and a connecting plate 411 is set at the top of the stabilizing frame 41; At the bottom four corners of the stable frame 41.
[0062] Follow-up support 42 is arranged in the cavity of stable frame 41, is provided with chute 421 in both sides in follow-up support 42, is provided with shaft hole in follow-up support 42 top, and four adjustment nuts 422 are arranged on follow-up support 42 bottom corners. The connecting shaft 43 passes through the shaft hole in the connecting plate 411 of the stable frame 41 and the shaft hole in the follower bracket 42 to connect the stable frame 41 with the follower bracket 42 ....
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The related dual-field leakage flux on-line detector for steel product comprises: a stable frame connected with a servo supporting frame by a connection shaft, a driver on the servo frame, a detection head between slide slots of servo frame, a gear rod to connect the driver and detection head, a magnetizer in water tank, and an active sensor. The detection method comprises: dropping the detection head to approach the steel surface and raising to a set height to generate memory magnetic field; recalling the detection condition data; detecting the ring magnetic field, generating alternative EM field by the sensor; generating distortion signal once detecting crack; processing the output signal to display and alarm and spray mark respectively.
Description
technical field [0001] The invention relates to a non-destructive detection device and detection method for surface defects of steel products, in particular to an online detection device and detection method for double-field leakage magnetic flux of continuous production steel product surface defects. Background technique [0002] Rough surface steel products are high-temperature continuous casting slabs. Due to the high temperature of the workpiece and the rough surface, at present, the non-destructive testing devices and detection methods for surface defects of various steel products in the prior art cannot detect the continuous production of steel products at high temperatures. Defects and deep cracks are effectively detected. The non-destructive testing devices and testing methods for surface defects of various steel products in the prior art are as follows: [0003] See figure 1 As shown, a prior art adopts an automatic camera detection device 10 and a visual inspecti...
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IPC IPC(8): G01N27/83
Inventor 韩世全
Owner 营口市北方检测设备有限公司