Test fixture and test method for drawing force of self-adhesive iron core
By designing a pull-out force test fixture for self-bonded iron cores and utilizing the coordination of connectors and a tensile testing machine, the problem of pull-out force testing of self-bonded iron cores was solved, and accurate pull-out force measurement was achieved.
Patent Information
- Application Number
- CN202410329617.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-21
- Publication Date
- 2025-09-30
AI Technical Summary
The existing technology lacks an effective test fixture, making it difficult to accurately test the pull-out force of the self-bonded iron core.
A pull-out force test fixture for a self-bonding iron core is designed, which includes a first force-bearing member, a second force-bearing member, a first connecting member, and a second connecting member. The first connecting member and the second connecting member are inserted into the inner circumferential wall of the self-bonding iron core and fixed thereto, and a tensile testing machine is used to apply force to perform a pull-out force test.
The accurate test of the pull-out force of the self-bonded iron core is achieved, ensuring the validity and accuracy of the test results.
Smart Images
Figure CN120721485A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of self-bonding iron cores, and in particular to a pull-out force testing fixture and a testing method for self-bonding iron cores. Background Art
[0002] An electric motor, commonly known as a motor, is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. Its primary function is to generate driving torque, serving as a power source for electrical appliances and various machines. The iron core plays a crucial role in the entire motor, increasing the magnetic flux of the inductor coil and achieving maximum electromagnetic power conversion.
[0003] With the continuous development of new energy, companies have higher and higher requirements for the quality of the iron core in the motor, and the materials are getting thinner and thinner. The emerging bonding process can greatly improve the performance of the iron core and reduce iron loss, making self-bonding iron core a favorite in the market.
[0004] Most self-bonded cores are ring-shaped, which makes it very difficult to test the pull-out force of the core after self-bonding. Currently, there is no effective test fixture. In view of this, it is necessary to develop a fixture to test the pull-out force of the self-bonded core. Summary of the Invention
[0005] In order to solve the above-mentioned deficiencies in the prior art, the first object of the present application is to provide a pull-out force testing fixture for a self-bonding iron core.
[0006] The present application is implemented through the following technical solution: a pull-out force testing fixture for a self-bonding iron core, comprising a first force-bearing member, a second force-bearing member, a first connecting member and a second connecting member, the first force-bearing member being connected to the first connecting member, the second force-bearing member being connected to the second connecting member, the first connecting member and the second connecting member being arranged between the first force-bearing member and the second force-bearing member, the first connecting member and the second connecting member being coaxially opposite to each other, the first force-bearing member and the second force-bearing member being respectively used to connect to a tensile testing machine, the first connecting member and the second connecting member being respectively used to be inserted into the inner circumferential wall of the self-bonding iron core to be tested and connected to the self-bonding iron core to be tested, and the first connecting member and the second connecting member having a certain distance therebetween after being inserted into the self-bonding iron core to be tested.
[0007] Furthermore, the first force-bearing member is a first force-bearing tension plate, the second force-bearing member is a second force-bearing tension plate, and the first force-bearing tension plate and the second force-bearing tension plate are arranged in parallel.
[0008] Furthermore, the first connecting member is a first screw, the second connecting member is a second screw, the first screw is vertically connected to the first load-bearing tension plate, and the second screw is vertically connected to the second load-bearing tension plate.
[0009] Furthermore, the outer diameter of the first screw is equal to the outer diameter of the second screw, and the outer diameter of the first screw is larger than the inner diameter of the self-bonding core to be tested.
[0010] Furthermore, the difference between the outer diameter of the first screw and the inner diameter of the self-bonding core to be tested is 1-4 mm.
[0011] Furthermore, the difference between the inner diameter of the first screw and the inner diameter of the self-bonding core to be tested is 1-2 mm.
[0012] Furthermore, the outer peripheries of the first screw and the second screw are coated with glue.
[0013] Furthermore, the first screw and the first stressed pulling plate are integrally provided or separately provided, and the second screw and the second stressed pulling plate are integrally provided or separately provided.
[0014] Furthermore, the lengths of the first connecting member and the second connecting member are equal, and the lengths of the first connecting member and the second connecting member inserted into the inner circumferential wall of the self-bonding core to be tested are also equal.
[0015] The second purpose of the present application is to provide a pull-out force testing method for a self-bonding iron core, and the test is performed using the above-mentioned pull-out force testing fixture for the self-bonding iron core. First, the first connecting member and the second connecting member are respectively inserted into the inner circumference of the self-bonding iron core to be tested and fixed to its inner circumferential wall. Then, a force is applied to the first force-bearing member and the second force-bearing member through a tensile testing machine, so that the first force-bearing member and the second force-bearing member move in opposite directions until the electrical steel on the self-bonding iron core to be tested is peeled off. At this time, the force applied by the tensile testing machine is the pull-out force of the self-bonding iron core.
[0016] The pull-out force testing fixture for the self-bonding iron core provided in the present application realizes the connection between the test fixture and the self-bonding iron core to be tested through the setting of the first connecting member and the second connecting member, thereby facilitating the testing of the pull-out force of the self-bonding iron core. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0018] Figure 1 This is a schematic diagram of the assembly structure of the self-bonding iron core pull-out force test fixture and the self-bonding iron core to be tested. DETAILED DESCRIPTION
[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application for which protection is sought, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.
[0020] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application 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 should not be understood as a limitation on this application.
[0021] In addition, it should be understood that although the terms first, second, third, etc. may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".
[0022] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms "a", "the" and "the" used in this application and the appended claims are also intended to include plural forms, unless the context clearly indicates otherwise. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically limited. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.
[0023] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.
[0024] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.
[0025] The following describes in detail a self-bonding iron core pull-out force test fixture and test method of the present application in conjunction with the accompanying drawings. The features of the following embodiments can be combined with each other unless they conflict.
[0026] Please refer to Figure 1 As shown, the present application provides a pull-out force test fixture for a self-bonded iron core, comprising a first force-bearing member, a second force-bearing member, a first connecting member and a second connecting member, wherein the first force-bearing member is connected to the first connecting member, the second force-bearing member is connected to the second connecting member, the first connecting member and the second connecting member are arranged between the first force-bearing member and the second force-bearing member, the first connecting member and the second connecting member are coaxially opposite to each other, the first force-bearing member and the second force-bearing member are respectively used to connect to a tensile testing machine, the first connecting member and the second connecting member are respectively used to be inserted into the inner circumferential wall of the self-bonded iron core 10 to be tested and connected to the self-bonded iron core 10 to be tested, and the first connecting member and the second connecting member have a certain distance 30 after being inserted into the self-bonded iron core 10 to be tested.
[0027] The self-bonding core 10 to be tested is subjected to a pull-out force test after being bonded and cured at a set temperature and a set pressure. The first connecting member and the second connecting member are respectively inserted from both ends of the self-bonding core 10 to be tested and fixed to its inner circumferential wall. Then, the tensile testing machine is applied to the first force-bearing member and the second force-bearing member to pull the first force-bearing member and the second force-bearing member to move in opposite directions. By applying tensile forces of different magnitudes, the electrical steel on the self-bonding core 10 to be tested is peeled off, and the pull-out force of the self-bonding core 10 is measured, thereby realizing the pull-out force test of the self-bonding core 10, so that the bonding factor of the self-bonding core 10 can be set according to the pull-out force requirements corresponding to the usage scenario.
[0028] After the first connecting member and the second connecting member are inserted into the self-bonding core 10, there is a certain distance 30 between them, so that under the pulling action of the tensile testing machine, the adjacent electrical steel in the middle position of the self-bonding core 10 is peeled off first, thereby ensuring the accuracy of the tensile force test of the self-bonding core 10.
[0029] In this embodiment, the first force-bearing member is a first force-bearing plate 21, and the second force-bearing member is a second force-bearing plate 23. The first force-bearing plate 21 and the second force-bearing plate 23 are arranged in parallel. This arrangement makes the forces exerted on the first force-bearing plate 21 and the second force-bearing plate 23 more uniform, ensuring the effectiveness of the pull-out force test of the self-bonded core 10 to be tested.
[0030] In this embodiment, the first connecting member is a first screw 22, and the second connecting member is a second screw 24. The first screw 22 is vertically connected to the first load-bearing tension plate 21, and the second screw 24 is vertically connected to the second load-bearing tension plate 23. The first screw 22, the second screw 24, the first load-bearing tension plate 21 and the second load-bearing tension plate 23 are all coaxially arranged.
[0031] In this embodiment, the outer diameter of the first screw 22 is equal to the outer diameter of the second screw 24, and the outer diameter of the first screw 22 is larger than the inner diameter of the self-bonded core 10 to be tested. The thread engagement force between the first screw 22 and the second screw 24 ensures a fixed connection between the first screw 22 and the self-bonded core 10 to be tested, and between the second screw 24 and the self-bonded core 10 to be tested. However, due to a certain gap between the threads, the outer peripheries of the first screw 22 and the second screw 24 are coated with glue, making the connection between the first screw 22 and the self-bonded core 10 to be tested, and between the second screw 24 and the self-bonded core 10 to be tested, more effective and stable.
[0032] The difference between the outer diameter of the first screw 22 and the inner diameter of the self-bonding core 10 to be tested is 1-4 mm, preferably 1-2 mm.
[0033] The first screw 22 is integrally or separately provided with the first tension plate 21, and the second screw 24 is integrally or separately provided with the second tension plate 23. In this embodiment, the first screw 22 is integrally formed with the first tension plate 21, and the second screw 24 is integrally formed with the second tension plate 23.
[0034] The first and second screws 22, 24 are of equal length, and the lengths to which they are inserted into the inner circumferential wall of the self-bonded core 10 to be tested are also equal. This arrangement allows the electrical steel adjacent to the center of the self-bonded core 10 to be tested, i.e., the center between the first and second screws 22, 24, to be peeled away first, further ensuring the accuracy of the pull-out force test of the self-bonded core 10.
[0035] When performing a pull-out force test on the self-bonded core 10 to be tested, the first screw 22 and the second screw 24 are first inserted into the inner circumference of the self-bonded core 10 to be tested and fixed to its inner circumferential wall. At this time, the first screw 22 and the second screw 24 are coaxially close and have a certain distance 30. Then, a force is applied to the first force-bearing tension plate 21 and the second force-bearing tension plate 23 through a tensile testing machine, so that the first force-bearing tension plate 21 and the second force-bearing tension plate 23 move in opposite directions until the adjacent electrical steel phases at the center of the self-bonded core 10 to be tested are peeled off. At this time, the force applied by the tensile testing machine is the pull-out force of the self-bonded core 10.
[0036] The above description is merely a preferred embodiment of the present application and does not constitute any form of limitation to the present application. Although the present application has been disclosed as above with preferred embodiments, it is not intended to limit the present application. Any technician familiar with this profession can make slight changes or modifications to equivalent embodiments with equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.
Claims
1. A pull-out force test fixture for a self-bonding iron core, characterized in that: It includes a first force-bearing member, a second force-bearing member, a first connecting member and a second connecting member, the first force-bearing member is connected to the first connecting member, the second force-bearing member is connected to the second connecting member, the first connecting member and the second connecting member are arranged between the first force-bearing member and the second force-bearing member, the first connecting member and the second connecting member are coaxially opposite to each other, the first force-bearing member and the second force-bearing member are respectively used to connect to a tensile testing machine, the first connecting member and the second connecting member are respectively used to be inserted into the inner circumferential wall of the self-bonded iron core to be tested and connected to the self-bonded iron core to be tested, and the first connecting member and the second connecting member have a certain distance after being inserted into the self-bonded iron core to be tested.
2. The pull-out force testing fixture for the self-bonding iron core according to claim 1, characterized in that: The first force-bearing member is a first force-bearing tension plate, the second force-bearing member is a second force-bearing tension plate, and the first force-bearing tension plate and the second force-bearing tension plate are arranged in parallel.
3. The pull-out force testing fixture for the self-bonding iron core according to claim 2, characterized in that: The first connecting member is a first screw, the second connecting member is a second screw, the first screw is vertically connected to the first stress-bearing tension plate, and the second screw is vertically connected to the second stress-bearing tension plate.
4. The pull-out force testing fixture for the self-bonding iron core according to claim 3, characterized in that: The outer diameter of the first screw is equal to the outer diameter of the second screw, and the outer diameter of the first screw is larger than the inner diameter of the self-bonding core to be tested.
5. The pull-out force testing fixture for the self-bonding iron core according to claim 4, characterized in that: The difference between the outer diameter of the first screw and the inner diameter of the self-bonding core to be tested is 1-4 mm.
6. The pull-out force testing fixture for the self-bonding iron core according to claim 5, characterized in that: The difference between the inner diameter of the first screw and the inner diameter of the self-bonding core to be tested is 1-2 mm.
7. The pull-out force testing fixture for the self-bonding iron core according to claim 4, characterized in that: The outer peripheries of the first screw and the second screw are both coated with glue.
8. The pull-out force testing fixture for the self-bonding iron core according to claim 3, characterized in that: The first screw and the first stressed pulling plate are integrally or separately provided, and the second screw and the second stressed pulling plate are integrally or separately provided.
9. The pull-out force testing fixture of the self-bonding iron core according to claim 1, characterized in that: The lengths of the first connecting member and the second connecting member are equal, and the lengths of the first connecting member and the second connecting member inserted into the inner peripheral wall of the self-bonding core to be tested are also equal.
10. A method for testing the pull-out force of a self-bonding iron core, characterized in that: A pull-out force testing fixture for a self-bonding core comprising the invention as claimed in any one of claims 1 to 9, wherein the first connecting member and the second connecting member are respectively inserted into the inner circumference of the self-bonding core to be tested and fixedly connected to its inner circumferential wall, and then a force is applied to the first force-bearing member and the second force-bearing member by a tensile testing machine, so that the first force-bearing member and the second force-bearing member move in opposite directions until the electrical steel on the self-bonding core to be tested is peeled off, at which time the force applied by the tensile testing machine is the pull-out force of the self-bonding core.