Magnetic powder inspection equipment with high detection accuracy

Abstract

The invention relates to magnetic powder inspection equipment with high detection accuracy. The equipment comprises a base, a top plate, a controller, a magnetic powder box, a spray head, a lifting mechanism, a support plate, a translation box, a rotary plate, a fastening mechanism, a cleaning mechanism, two support plates and two magnetizing devices, wherein the cleaning mechanism comprises an alcohol box, a dropper, a sponge block and a mounting assembly, the mounting assembly comprises a guide rod and two mounting units, and each mounting unit comprises a lifting plate, a spring and a pressing plate; a translation mechanism comprises a translation block, a translation plate, a first motor, an offset assembly and two translation assemblies. According to the magnetic powder inspection equipment with high detection accuracy, oil stains on the surface of a workpiece are removed through the cleaning mechanism, and the condition that oil stains adsorb magnetic powder and affect distribution of magnetic marks is prevented; in addition, the rotary plate is driven to rotate and offset through the translation assemblies, surplus magnetic powder is thrown conveniently through rotation of the workpiece after the magnetic powder falls onto the surface of the workpiece, magnetic mark display is correct, and the detection accuracy and the practicability of the equipment are conveniently improved.

Description

technical field [0001] The invention relates to the field of detection instruments, in particular to a magnetic particle flaw detection device with high detection accuracy. 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, and through the difference between the magnetic permeability of the surface and near-surface defects (such as cracks, slag inclusions, hairlines, etc.) of steel products and the magnetic permeability of steel, these materials are magnetized The magnetic field at the discontinuity will be distorted, forming a leakage magnetic field 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, that is, the magnetic mark, showing the position and shape of the defect under appropriate lighting conditions. The accumulation of these m...

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Problems solved by technology

[0003] However, when the existing magnetic particle flaw detection device detects the surface of the workpiece of steel products, the surface of the workpiece usually contains oil stains. After the magnetic powder is removed, some excess magnetic powder tends to stay on the surface where the non-defect position of the workpiece is located, resulting in the expansion of the magnetic mark display, which in turn reduces the accuracy, resulting in a reduction in the practicability of the existing magnetic particle flaw detection device

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