An alien magnetic detector

Abstract

The present invention provides a kind of extraterrestrial magnetic detector, which comprises a main body, a linear guide rail is arranged on the main body, a moving collet coil device and an outer star wheel workpiece bearing platform are both arranged on the linear guide rail, and a moving chuck coil device is arranged on the linear guide rail. Above the workpiece loading platform of the outer star wheel; there is a liquid collecting tank under the linear guide rail, and the lower part of the fixed chuck coil device with internal spray function is set in the liquid collecting tank, and the fixed chuck coil device and the moving chuck coil device are coaxially arranged ; There is an external spray head in the liquid collection tank, and the liquid collection tank is connected to the magnetic suspension tank; the side of the main body is equipped with an automatic loading and unloading mechanism. The device provided by the invention overcomes the deficiencies of the prior art, and enables the planetary wheels of various specifications to be magnetized sufficiently and evenly without changing tooling, and can conveniently realize automatic loading and unloading of workpieces, which is safe and reliable. The failure rate is low, and it can be inserted into the factory automatic assembly line.

Description

technical field [0001] The invention relates to a magnetic detector for outer planetary wheels, which is used for magnetic particle flaw detection of outer planetary wheels of automobile parts, and belongs to the technical field of magnetic detectors. Background technique [0002] The outer star wheel is the main part in the car drive shaft universal joint. If there are defects such as cracks caused by material quality and processing on the outer star wheel, the drive shaft may break during use, which can easily cause car crashes and fatal accidents. Therefore, it must be inspected for flaw detection during the manufacturing process of the outer planetary wheel. From the perspective of fracture mechanics, the risk of surface defects is much higher than that of internal defects of the same size, so the magnetic particle inspection equipment suitable for the detection of surface and near-surface defects of ferromagnetic materials is used by manufacturers as an important means...

AI Technical Summary

Problems solved by technology

[0005] 1. Horizontal magnetic detector: the small end of the outer star wheel and the top of the inner spherical surface of the outer star wheel are clamped by the chucks at both ends, and the circumferential magnetization is carried out by directly passing the alternating current to find the axis of the inner and outer surface of the outer star wheel. Directional defects: The closed-circuit yoke is composed of chucks, guide rails and outer star wheel workpieces, and longitudinal magnetization is carried out by passing direct current through the coils on the chucks at both ends to find radial defects on the inner and outer surfaces of the outer star wheel ;This kind of structure can fully magnetize the inner and outer surfaces of the outer star wheel workpiece, but it can only be loaded and unloaded manually, and the rhythm is slow, which cannot meet the requirements of mass production.

In addition, due to the longitudinal AC magnetization, affected by the AC skin effect, it is difficult for the magnetic field to be introduced into the inner spherical surface of the outer star wheel, so that the defects of the inner spherical surface cannot be clearly displayed

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