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Testing Method Of Bolts
Nov 03, 2017

Bolt detection is divided into two types: artificial and machine. Manual is the most primitive and most commonly used consistent detection method. In order to minimize the outflow of undesirable products, general production enterprise personnel through the visual manner of the packaging or delivery of products to carry out inspection to exclude undesirable products (including tooth injury, mixed materials, rust, etc.).

Another way for machine automatic detection, mainly magnetic particle flaw detection. Magnetic particle flaw detection is the interaction between magnetic particle and leakage magnetic field in the defect of bolts, according to the difference of the magnetic permeability and the steel permeability of the possible defects of the bolts (such as crack, slag, mixing, etc.), after magnetization, the field in the discontinuous place of these materials will be changed to form a leakage magnetic field on the workpiece surface of part of the flux leakage. In order to attract magnetic powder to form defects in the magnetic powder accumulation-magnetic trace, in the appropriate light conditions, showing the location and shape of defects, the accumulation of these magnetic particles to observe and explain, has achieved the purpose of eliminating undesirable products.

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