Magnetic particle flaw detector for irregular parts

Abstract

The invention discloses a magnetic particle flaw detector for irregular parts. The magnetic particle flaw detector includes a rack, an iron core is fixed on the rack, multiple groups of longitudinal magnetization coils and multiple groups of circumferential magnetization coils in wire connection are fixed to the iron core, the longitudinal magnetization coils are in circular distribution along the horizontal circumferential direction, and the circumferential magnetization coils are in longitudinal extension distribution. During use of the magnetic particle flaw detector, workpieces are placed in a liquid collection bucket, when a magnetic suspension liquid is sprayed to irregular parts, the longitudinal magnetization coils and circumferential magnetization coils of the magnetic particle flaw detector provided by the invention can form a multipath three-dimensional magnetic field for magnetic particle flaw detection of the irregular parts. Compared with existing two-path magnetic field, the multi-path magnetic field can achieve more accurate flaw detection, also the irregular parts only need to be placed in the liquid collection basket, and no special clamping tool is needed, the diversity problem of irregular parts is solved, i.e. the magnetic particle flaw detector can be applicable to different irregular parts. Therefore, the magnetic particle flaw detector for irregular parts provided by the invention has the technical effects of precise flaw detection and good universality.

Description

technical field [0001] The invention relates to a magnetic particle inspection equipment, which is a non-destructive inspection method for finding defects on the surface or near the surface through the leakage magnetic field generated by the magnetism. Background technique [0002] After the workpiece made of ferromagnetic material is magnetized, the workpiece has magnetic force lines passing through it. If the workpiece itself has no defects, the magnetic field lines are uniformly and continuously distributed inside it. However, when there are defects inside the workpiece, such as cracks, inclusions, pores and other non-ferromagnetic substances, their reluctance is very large and their permeability is low, which will inevitably cause changes in the distribution of magnetic force lines. The magnetic lines of force at the defect cannot pass through, and a certain degree of bending will occur. [0003] Existing magnetic particle inspection machines are generally aimed at val...

AI Technical Summary

Problems solved by technology

For special special-shaped parts such as small batches or sharp corners, there are no corresponding fixtures for positioning special-shaped parts on the market, and general testing equipment. If special equipment for special-shaped parts is produced, it will undoubtedly increase a lot of manufacturing costs.

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