Magnetic ring and magnetic core pressure stress test clamp

Abstract

The utility model discloses a magnetic ring and magnetic core pressure stress test fixture, which comprises a compressible test frame and a jig part arranged in the test frame, an inductance test device with one end capable of being in winding connection with a product to be tested is arranged on the outer side of the test frame, and the jig part comprises a first hoop and a second hoop which are correspondingly arranged. A cavity for placing a product to be tested is arranged between the first hoop and the second hoop, and a pressure adjusting device is arranged above the test frame, so that the pressure adjusting device is utilized to push the test frame to compress, and then the first hoop can be connected with the surface of the product to be tested to quantitatively apply pressure; moreover, the inductance of the product after pressurization is monitored in time through the inductance testing device, thereby facilitating the quantification of the pressure stress of the product, and meeting the requirements of subsequent material research and development, and belongs to the technical field of pressure stress testing.

Description

Technical Field

[0001] The utility model belongs to the technical field of compressive stress testing, and more specifically relates to a compressive stress testing fixture for a magnetic ring and a magnetic core. Background Art

[0002] Magnetic rings and magnetic cores are electronic accessories that are often used in winding coils and transformers. Magnetic rings are also called ferrite magnetic rings. They are annular magnetic conductors. The main material is ferrite. Magnetic rings have different impedance characteristics at different frequencies. Magnetic cores refer to a sintered magnetic metal oxide made by mixing and pressing various iron oxide mixtures. Its magnetic permeability generally ranges from tens to thousands. The magnetoelectric properties mainly depend on the magnetic permeability of the powder material, the size and shape of the powder, their filling factor, the content of the insulating medium, the molding pressure and the heat treatment process.

[0003] When the magnetic ring is used by the client, it will be wound with copper wires of different specifications to make an inductor. When the number of copper coils is large or the copper wire is very thick, compressive stress will be generated on the magnetic ring, causing the inductance performance of the magnetic ring to fluctuate. Therefore, it is necessary to consider the impact of compressive stress on inductance during material research and development, and develop materials that resist compressive stress. However, the compressive stress caused by the tightness and number of turns of copper wire winding is not well quantified, so it is difficult to make a comparison. Utility Model Content

[0004] The main purpose of the utility model is to provide a magnetic ring and magnetic core compressive stress testing fixture which can apply pressure quantitatively and perform inductance testing under the pressurized state.

[0005] In order to achieve the above object, the technical solution of the utility model is:

[0006] A magnetic ring and magnetic core compressive stress test fixture, including a compressible test frame and a fixture part arranged in the test frame, an inductance test device with one end that can be wound around a product to be tested is provided on the outside of the test frame, the fixture part includes a first clamp and a second clamp that are correspondingly arranged, a cavity for placing the product to be tested is provided between the first clamp and the second clamp, and a pressure regulating device is provided above the test frame, and the pressure regulating device can push the test frame to compress so that the first clamp is in contact with the surface of the product to be tested.

[0007] In a specific embodiment of the present invention, the test frame includes a first pressing plate and a second pressing plate which are arranged in parallel, and at least two return springs are arranged between the first pressing plate and the second pressing plate.

[0008] In a specific embodiment of the present invention, the first clamp is arranged perpendicular to the lower end surface of the second pressing plate.

[0009] In a specific embodiment of the present invention, the pressure regulating device comprises a pressure sensor arranged perpendicularly to the upper end surface of the test frame and a pressure regulating knob arranged on the pressure sensor.

[0010] In a specific embodiment of the present invention, a pressure display gauge is provided on the side of the pressure sensor.

[0011] In a specific embodiment of the present invention, the first clamp, the second clamp and the pressure sensor are coaxially arranged.

[0012] In a specific embodiment of the utility model, the inductance testing device comprises a tester and a display panel arranged on a side of the tester, and a plurality of connectors are arranged at intervals below the display panel.

[0013] In a specific embodiment of the present invention, the corresponding connectors and the product to be tested can be connected respectively by copper wires, so that the inductance testing device can timely monitor the change of the inductance of the product after pressurization.

[0014] In a specific embodiment of the present invention, the first clamp and the second clamp are both arc-shaped.

[0015] One of the above technical solutions of the utility model has at least one of the following advantages or beneficial effects:

[0016] The utility model arranges a pressure regulating device above the test frame, and uses the pressure regulating device to push the test frame for compression, so that the first clamp can be connected with the surface of the product to be tested, and quantitative pressure is applied. The inductance change of the product after pressurization is timely monitored by the inductance testing device, so as to facilitate the quantification of the compressive stress of the product and meet the needs of subsequent material research and development. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments;

[0018] Attached Figure 1 This is an overall structural diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0019] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0020] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more features.

[0023] In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection or a movable connection, a detachable connection or a non-detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be internal connection between two elements, indirect connection, or an interactive relationship between two elements.

[0024] The following disclosure provides many different embodiments or examples for implementing different solutions of the present invention.

[0025] See attached Figure 1 As shown, a magnetic ring and magnetic core compressive stress test fixture includes a compressible test frame 1, a fixture part 2 arranged in the test frame 1, an inductance test device 3 and a pressure adjustment device 4, wherein the inductance test device 3 is arranged on the outside of the test frame 1, and one end of the inductance test device 3 can be wound with the product to be tested.

[0026] In one embodiment of the utility model, the test frame 1 includes a first pressure plate 11 and a second pressure plate 12 arranged in parallel, two return springs 13 are provided between the first pressure plate 11 and the second pressure plate 12, the two return springs 13 are respectively located at the two ends of the first pressure plate 11 and the second pressure plate 12, and the first clamp 21 is arranged perpendicular to the lower end surface of the second pressure plate 12.

[0027] In one embodiment of the utility model, the fixture part 2 includes a first clamp 21 and a second clamp 22 which are correspondingly arranged, and a cavity for placing the product to be tested is provided between the first clamp 21 and the second clamp 22, and the first clamp 21 and the second clamp 22 can be set according to the size or shape of the product, and the first clamp 21 and the second clamp 22 are preferably arc-shaped.

[0028] In one embodiment of the utility model, the pressure regulating device 4 is located above the test frame 1, and the pressure regulating device 4 includes a pressure sensor 41 arranged perpendicular to the upper end surface of the test frame 1 and a pressure regulating knob 42 arranged on the pressure sensor 41. A pressure display gauge 43 is provided on the side of the pressure sensor 41, and the end of the pressure sensor 41 away from the pressure regulating knob 42 can be connected to the first pressure plate 11.

[0029] In one embodiment of the utility model, the first clamp 21, the second clamp 22 and the pressure sensor 41 are coaxially arranged, so that the pressure regulating device 4 can push the test frame 1 to compress through the pressure sensor 41, thereby making the first clamp 21 connect with the surface of the product to be tested, thereby achieving the purpose of quantitatively applying pressure.

[0030] In one embodiment of the present invention, the inductance testing device 3 includes a tester 31 and a display panel 32 disposed on a side of the tester 31 , and four connectors 33 are spaced apart below the display panel 32 .

[0031] In one embodiment of the utility model, the corresponding connector 33 and the product to be tested can be connected respectively by copper wires, so that the inductance testing device 3 can timely monitor the change of the inductance of the product after pressurization, thereby facilitating the quantification of the compressive stress of the product and meeting the needs of subsequent material research and development.

[0032] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A magnetic ring and magnetic core compressive stress test fixture, characterized in that: The invention comprises a compressible test frame (1) and a fixture part (2) arranged in the test frame (1); an inductance test device (3) whose one end can be wound around a product to be tested is arranged on the outer side of the test frame (1); the fixture part (2) comprises a first clamp (21) and a second clamp (22) arranged correspondingly; a cavity for placing the product to be tested is arranged between the first clamp (21) and the second clamp (22); a pressure regulating device (4) is arranged above the test frame (1); the pressure regulating device (4) can push the test frame (1) to be compressed so that the first clamp (21) is in contact with the surface of the product to be tested.

2. The magnetic ring and magnetic core compressive stress test fixture according to claim 1, characterized in that: The test frame (1) comprises a first pressing plate (11) and a second pressing plate (12) which are arranged in parallel, and at least two return springs (13) are arranged between the first pressing plate (11) and the second pressing plate (12).

3. The magnetic ring and magnetic core compressive stress test fixture according to claim 2, characterized in that: The first clamp (21) is arranged perpendicular to the lower end surface of the second pressing plate (12).

4. The magnetic ring and core compressive stress test fixture according to claim 1, characterized in that: The pressure regulating device (4) comprises a pressure sensor (41) arranged perpendicular to the upper end surface of the test frame (1) and a pressure regulating knob (42) arranged on the pressure sensor (41).

5. The magnetic ring and magnetic core compressive stress test fixture according to claim 4, characterized in that: A pressure display gauge (43) is provided on the side of the pressure sensor (41).

6. The magnetic ring and core compressive stress test fixture according to claim 4, characterized in that: The first clamp (21), the second clamp (22) and the pressure sensor (41) are coaxially arranged.

7. The magnetic ring and core compressive stress test fixture according to claim 1, characterized in that: The inductance testing device (3) comprises a tester (31) and a display panel (32) arranged on the side of the tester (31), and a plurality of connectors (33) are arranged at intervals below the display panel (32).

8. The magnetic ring and core compressive stress test fixture according to claim 7, characterized in that: The corresponding connectors (33) and the product to be tested can be connected respectively by copper wires, so that the inductance testing device (3) can timely monitor the change of the inductance of the product after pressure is applied.

9. The magnetic ring and magnetic core compressive stress test fixture according to claim 1, characterized in that: The first clamp (21) and the second clamp (22) are both arc-shaped.

Images