Bidirectional composite auxiliary magnetization device for magnetic powder detection
By designing a bidirectional composite auxiliary magnetization device, a bidirectional magnetic field is generated using an AC coil and electrodes, which solves the problem of low multidirectional magnetization efficiency of specimens in the existing technology and realizes efficient detection of the inner and outer surfaces and both ends of the specimen.
Patent Information
- Application Number
- CN202423237089.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2034-12-26
AI Technical Summary
Existing magnetization devices cannot magnetize the specimen in multiple directions during a single excitation process, resulting in low detection efficiency.
A bidirectional composite auxiliary magnetization device is designed. It generates a bidirectional longitudinal magnetic field through AC coil I and AC coil II, and generates a circumferential magnetic field by combining the left and right electrodes, so as to realize the bidirectional magnetization of the specimen. It is suitable for detecting defects on the inner and outer surfaces and both ends of the specimen.
It enables non-contact testing of specimens, allowing simultaneous inspection of any orientation defects on the inner and outer surfaces and both ends of the specimen, thus improving testing efficiency.
Smart Images
Figure CN223857123U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to detection technical field, specifically disclose a two -way composite auxiliary magnetization device for magnetic particle detection. BACKGROUND
[0002] Magnetic particle detection is mainly used for the ferromagnetic material test piece after magnetization, due to the existence of discontinuity in the test piece, the magnetic force line of the workpiece surface and the near surface partial distortion and produce leakage magnetic field, adsorb the magnetic powder applied on the test piece surface, form the visual magnetic mark under the suitable light, thereby show the position, size, shape and severity of discontinuity. Since when the discontinuous orientation and the angle of magnetic field direction is less than 45 DEG, it is difficult to detect by using magnetic particle inspection, therefore, in order to ensure the detection of any orientation discontinuity, each workpiece must be magnetized and inspected at least in two directions, and the direction of two magnetizations is approximately perpendicular. In summary, the more complex the shape of the workpiece, the more the number of single direction magnetization and inspection to be implemented. The current magnetization device cannot realize the magnetization process of one excitation to magnetize the test piece in multiple directions, and the detection efficiency is low.
[0003] Therefore, it is urgent to develop a brand new magnetization device to overcome the problems in the prior art. CONTENT OF THE UTILITY MODEL
[0004] In order to solve the above technical problems, the utility model provides the following technical scheme:
[0005] A two -way composite auxiliary magnetization device for magnetic particle detection, including alternating -current coil I, magnetic yoke I, right support body, right electrode, magnetic yoke II, alternating -current coil II, left support body, metal stick, left electrode, alternating -current coil I is wound on magnetic yoke I, and alternating -current coil II is wound on magnetic yoke II;The magnetic yoke I is parallel to the magnetic yoke II, and is supported by the left support body and the right support body between the two;The left electrode and the right electrode are symmetrically arranged on the left support body and the right support body respectively;The left electrode and the right electrode are connected by the metal stick.
[0006] Alternating -current coil I is wound on magnetic yoke I, and alternating -current coil II is wound on magnetic yoke II;The magnetic yoke I is parallel to the magnetic yoke II, and is supported by the left support body and the right support body between the two;The left electrode and the right electrode are symmetrically arranged on the left support body and the right support body respectively;The left electrode and the right electrode are connected by the metal stick.
[0007] Preferably, the alternating -current coil I and alternating -current coil II are made of enameled wire.
[0008] Preferably, the alternating -current coil I is connected with the first alternating -current source, the alternating -current coil II is connected with the second alternating -current source, and the flow directions of the first alternating -current and the second alternating -current are the same. Alternating -current coil I and alternating -current coil II are connected with alternating current to generate a two -way longitudinal magnetic field, which is used for detecting the circumferential defects of the test piece.
[0009] Preferably, the right electrode and the left electrode are connected with the third alternating -current, and the third alternating -current generates a circumferential magnetic field to detect the longitudinal defects of the test piece.
[0010] Preferably, the right support body and the left support body are provided with sliding mechanisms along the length and width directions of the magnetic yoke I and the magnetic yoke II, so as to magnetize test pieces of different lengths.
[0011] Preferably, the left electrode and the right electrode are provided with lifting mechanisms on the right support body and the left support body, so as to magnetize test pieces of different diameters.
[0012] Preferably, the right electrode and the left electrode are provided with copper meshes on the surfaces, so as to avoid fire.
[0013] Preferably, the metal rod is a copper rod.
[0014] Preferably, the test piece is a cylindrical hollow structure and is placed on the metal rod. When the test piece is magnetized in the circumferential direction, the central conductor method is used for magnetization, so that the inner and outer surfaces and the end surface of the test piece can be magnetized in the circumferential direction. When the test piece is a small cylindrical structure, a plurality of test pieces can be placed on the metal rod at one time for magnetization, so as to improve the efficiency.
[0015] The principle of the utility model lies in that: the alternating current coil I is connected with the first alternating current and the alternating current coil II is connected with the second alternating current, based on the electromagnetic induction principle, the alternating current coil I and the alternating current coil II form the bidirectional alternating magnetization coil, the generated bidirectional magnetic field is superimposed to realize the magnetic field focusing, is mainly used for generating the bidirectional additional longitudinal magnetic field, and mainly detects the circumferential defects of test piece. The left support body and the right support body are fixed between the magnetic yoke I and the magnetic yoke II, the left support body is provided with the left electrode, the right support body is provided with the right electrode, the metal rod is clamped between the left electrode and the right electrode, the left electrode and the right electrode generate the circumferential magnetic field, and the longitudinal defect detection of test piece is realized.
[0016] The utility model discloses obtained the beneficial effect:
[0017] The double-sided composite auxiliary magnetization device is suitable for magnetic powder detection of a cylindrical test piece, has no contact, does not display magnetic poles, and can simultaneously detect defects of any orientation on the inner and outer surfaces and two ends of the test piece. BRIEF DESCRIPTION OF DRAWINGS
[0018] The accompanying drawings are included to provide a further understanding of the utility model, and constitute a part of the specification, and are used for explaining the utility model together with embodiments of the utility model, and do not constitute the limitation to the utility model. In the drawings:
[0019] Figure 1 It is a bidirectional composite auxiliary magnetization device for magnetic powder detection.
[0020] In the drawing: 1, alternating current coil I;2, magnetic yoke I;3, right support body;4, right electrode;5, magnetic yoke II;6, alternating current coil II;7, left support body;8, metal rod;9, left electrode;10, test piece. DETAILED DESCRIPTION
[0021] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.
[0022] In the attached diagram, all identical reference numerals refer to the same components.
[0023] Example 1
[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0025] like Figure 1 As shown, a schematic diagram of a bidirectional composite auxiliary magnetization device for magnetic particle detection is provided, including an AC coil I (1), a magnetic yoke I (2), a right support body (3), a right electrode (4), a magnetic yoke II (5), an AC coil II (6), a left support body (7), a metal rod (8), a left electrode (9), and a test piece (10). The AC coil I (1) is wound around the magnetic yoke I (2), and the AC coil II (6) is wound around the magnetic yoke II (5). AC current is passed through the AC coil I (1) and the AC coil II (6) to generate a bidirectional longitudinal magnetic field, which is mainly used to detect circumferential defects in the test piece (10). The left support body (7) and the right support body (3) are fixed between the magnetic yoke I (2) and the magnetic yoke II (5). The left support body (7) is provided with a left electrode (9), and the right support body (3) is provided with a right electrode (4). The metal rod (8) is clamped between the left electrode (7) and the right electrode (4). The left electrode (7) and the right electrode (4) generate a circumferential magnetic field to realize the detection of longitudinal defects in the test piece.
[0026] The specific steps for use are as follows: First, pretreatment: remove debris such as oil stains, paint, burrs, oxide scale, and metal shavings from the surface of the specimen (10); Second, magnetization: based on the principle of electromagnetic induction, AC coil I (1) is supplied with AC current 1 and AC coil II (6) is supplied with AC current 2. AC coil I (1) and AC coil II (6) mainly generate bidirectional longitudinal magnetic fields for detecting circumferential defects of the specimen (10). The left electrode (7) and right electrode (4) are supplied with AC current to generate circumferential magnetic fields for detecting longitudinal defects of the specimen (10); Third, magnetic suspension liquid is applied: magnetic suspension liquid is applied while the specimen (10) is magnetized; Fourth, under darkroom conditions, the specimen (10) is observed with an ultraviolet lamp. If defects are found, they are marked with a red pen and evaluated; Fifth, demagnetization and post-treatment: the specimen (10) is demagnetized and the magnetic suspension liquid on the surface of the specimen (10) is cleaned.
[0027] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A bidirectional composite auxiliary magnetization device for magnetic particle detection, characterized in that, The alternating current coil I, the magnetic yoke I, the right support body, the right electrode, the magnetic yoke II, the alternating current coil II, the left support body, the metal rod and the left electrode are provided. The alternating current coil I is wound on the magnetic yoke I, and the alternating current coil II is wound on the magnetic yoke II; the magnetic yoke I and the magnetic yoke II are parallel to each other and are connected and supported by the left support body and the right support body; the left support body and the right support body are symmetrically provided with the left electrode and the right electrode respectively; and the left electrode and the right electrode are connected by the metal rod.
2. The bidirectional composite auxiliary magnetization device for magnetic particle detection according to claim 1, characterized in that, The alternating current coil I and the alternating current coil II are made of enameled wire.
3. The bidirectional composite auxiliary magnetization device for magnetic particle detection according to claim 1, characterized in that, The alternating current coil I is connected with a first alternating current source, the alternating current coil II is connected with a second alternating current source, and the first alternating current and the second alternating current have the same flow direction.
4. The bidirectional composite auxiliary magnetizing device for magnetic particle detection according to claim 1, characterized in that, The right electrode and the left electrode are connected with a third alternating current.
5. The bidirectional composite auxiliary magnetizing device for magnetic particle detection according to claim 1, characterized in that, The right support body and the left support body are provided with sliding mechanisms along the length and width directions of the magnetic yoke I and the magnetic yoke II.
6. The bidirectional composite auxiliary magnetizing device for magnetic particle detection according to claim 1, characterized in that, The left electrode and the right electrode are provided with lifting mechanisms on the right support body and the left support body.
7. The bidirectional composite auxiliary magnetizing device for magnetic particle detection according to claim 1, characterized in that, The surfaces of the right electrode and the left electrode are provided with copper meshes.
8. The bidirectional composite auxiliary magnetizing device for magnetic particle detection according to claim 1, characterized in that, The metal rod is a copper rod.