Roller flaw detection process for steel structure production

Abstract

The invention discloses a roller flaw detection process for steel structure production. The roller flaw detection process is characterized by comprising the steps of: a, precleaning, which is implemented by removing grease and other impurities possibly affecting normal distribution of magnetic powder and affecting density, characteristics and clarity of magnetic powder deposits on surfaces of allmaterials and test piece; b, flaw detection of defects, which is implemented by performing flaw detection of defects on a roller by means of magnetic powder flaw detection equipment; c, demagnetization, which is implemented by demagnetizing magnetic powder directly by means of the magnetic powder flaw detection equipment; d, post-cleaning, which is implemented by cleaning all magnetic powder on the test pieces after inspection and demagnetization, and thoroughly removing all blockages in holes and cavities.

Description

technical field [0001] The invention belongs to the technical field of flaw detection equipment, and in particular relates to a roller flaw detection process for steel structure production. Background technique [0002] Magnetic particle flaw detection uses the interaction between the leakage magnetic field at the defect of the workpiece and the magnetic powder. It uses the difference between the magnetic permeability of the surface of the steel product and the near-surface defects (such as cracks, slag inclusions, hairlines, etc.) and the magnetic permeability of the steel. After magnetization, these The magnetic field at the discontinuity of the material will change, and a leakage magnetic field will be generated on the surface of the workpiece at the part of the magnetic flux leakage, thereby attracting the magnetic powder to form the magnetic powder accumulation at the defect - the magnetic trace. Under appropriate lighting conditions, the defect position and The shape, ...

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Problems solved by technology

[0004]However, when the device detects the flaws of the rollers, it needs to wait for the flaw detection of the three rollers to be completed before proceeding to the next round of flaw detection. There is a certain limit to the quantity. At the same time, after the flaw detection is completed, the rollers need to be manually removed one by one and sorted and placed, which reduces the flaw detection efficiency of the rollers.

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