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Bolt defect magnetic testing device

A magnetic detection device and magnetic detection technology, applied in the direction of material magnetic variables, etc., can solve problems such as complex detection procedures, fast ultrasonic attenuation, and opening defects

Active Publication Date: 2015-09-30
NINGBO YINZHOU CITAI ELECTRONICS TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the ultrasonic wave attenuates quickly in the air, and the detection generally requires a sound wave propagation medium, such as oil or water and other coupling agents.
There are the following limitations for bolt penetration testing: the testing procedure is complicated, only surface opening defects can be detected, and the environmental pollution is serious

Method used

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  • Bolt defect magnetic testing device
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Embodiment Construction

[0020] Below in conjunction with accompanying drawing and specific embodiment the present invention will be described in further detail:

[0021] Such as Figure 1-Figure 2 As shown, the present invention proposes a magnetic detection device for bolt defects, which includes a magnetic detection mechanism, a signal collector and a controller with a display. The magnetic detection mechanism is provided with a magnetic detection sensor, and the magnetic detection sensor collects signals through connected with the controller, the magnetic detection mechanism includes two support plates 4 connected by connecting rods, each of the two support plates 4 is provided with a rotating plate 1 that is rotatably connected with the support plates 4, and the two The rotating plates 1 are arranged in parallel, and the two sides facing each other of the two rotating plates 1 are respectively provided with a clamping seat 3 for clamping the two ends of the workpiece 9. When the two rotating plat...

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Abstract

The invention provides a bolt defect magnetic testing device which comprises a magnetic testing mechanism, a signal acquiring device and a controller with a display; a magnetic testing sensor is arranged in the magnetic testing mechanism, and connected with the controller through the signal acquiring device; the magnetic testing mechanism comprises two supporting plates connected through a connecting rod; rotating plates rotationally connected with the corresponding supporting plates are arranged on the two corresponding supporting plates; the two rotating plates are arranged in parallel; grip slippers used for gripping two ends of a workpiece are respectively arranged on two opposite surfaces of the two rotating plates; a sliding seat sliding on the connecting rod is arranged on the connecting rod; the magnetic testing sensor is arranged on the sliding seat. The bolt defect magnetic testing device, provided by the invention, is used for nondestructive testing of the surface defect and the near surface defect of a high-strength bolt.

Description

technical field [0001] The invention relates to the technical field of magnetic detection, in particular to a bolt defect magnetic detection device for high-strength bolts. Background technique [0002] Bolts made of high-strength steel, or bolts that require a large pre-tightening force, can be called high-strength bolts. High-strength bolts are mostly used for the connection of bridges, rails, high-pressure and ultra-high-pressure equipment. The fracture of such bolts is mostly brittle fracture. The high-strength bolts used in ultra-high pressure equipment require a large prestress in order to ensure the sealing of the container. [0003] Since such high-strength bolts need to exert a large pre-tightening force, the quality requirements of the bolts are relatively high, and the quality inspection of such bolts often requires non-destructive testing technology. At present, the commonly used methods of non-destructive testing include ultrasonic testing, eddy current testi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/82
Inventor 于润桥夏桂锁张斌胡博程东方程强强
Owner NINGBO YINZHOU CITAI ELECTRONICS TECH CO LTD
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