Round magnetic core drawing test device

Abstract

The invention provides a circular magnetic core drawing test device which comprises a base assembly, a grabbing assembly arranged on the base assembly and used for grabbing a circular shell magnetic core, a drawing assembly arranged on one side of the grabbing assembly, and air pipe fittings arranged on the grabbing assembly and the drawing assembly correspondingly. The grabbing assembly comprises a first grabbing piece far away from one side of the drawing assembly and a second grabbing piece arranged on one side, close to the drawing assembly, of the first grabbing piece, the second grabbing piece is driven by the drawing assembly and moves in the direction close to or far away from the first grabbing piece, and the circular shell magnetic core is located between the opposite positions of the first grabbing piece and the second grabbing piece. Through the circular structural design of the first grabbing piece and the second grabbing piece at the contact part with the circular shell magnetic core, the outer surface of the circular shell magnetic core can be effectively attached in the grabbing process, so that the pressure on the outer surface in the clamping process of the circular shell magnetic core is uniform, and the drawing force is uniformly applied in the drawing process; therefore, the data accuracy in the subsequent drawing force measurement process is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of round magnetic core testing, and in particular to a round magnetic core pulling test device. Background Art

[0002] The magnetic core is a common electronic component, widely used in various electromagnetic devices. As the name suggests, the round magnetic core refers to a magnetic core with a round shape. It is usually made of magnetic materials such as ferrite, soda-lime glass, etc., and has high magnetic permeability and magnetic saturation induction intensity. The structure of the round magnetic core may include solid or hollow forms, in which the hollow magnetic core has a hollow hole in the middle so that wires or other devices can pass through it.

[0003] After the round magnetic core is produced and processed, it is necessary to conduct appearance inspection, effect monitoring and durability quality inspection. Among them, the pull-out test of the round magnetic core is one of the important means to evaluate its mechanical properties and durability. Through the test, we can understand the tensile strength, fracture mode and deformation of the magnetic core, and provide strong support for the design, manufacture and application of the magnetic core. In practical applications, appropriate test methods and parameters should be selected according to specific needs to ensure the accuracy and reliability of the test results.

[0004] In the existing round magnetic core pulling test process, due to the round design of the magnetic core itself, for the convenience of testing, most of the time, multiple sets of clamps are used to clamp along the edge of the round magnetic core, and the clamps are connected to the corresponding tensile gauges to complete the final pulling test. However, the clamping method using multiple sets of clamps will cause some clamps to have uneven clamping forces during subsequent pulling tests due to different clamping positions, thereby affecting the accuracy of subsequent pulling tests. At the same time, the clamping method using multiple sets of clamps will cause uneven clamping forces at multiple locations on the surface of the round magnetic core, and cause different wear conditions on the outer surface of the round magnetic core during the subsequent pulling process. Summary of the invention

[0005] Based on this, the purpose of the present invention is to provide a circular magnetic core pulling test device, which aims to solve the problem in the prior art that multiple sets of clamps are usually used to clamp the edges of the circular magnetic core during the existing circular magnetic core pulling test, which easily leads to uneven clamping force and different wear on the outer surface of the circular magnetic core.

[0006] The present invention provides a circular magnetic core pulling test device, comprising a base assembly, a grabbing assembly arranged on the base assembly for grabbing a circular shelled magnetic core, a pulling assembly arranged on one side of the grabbing assembly, and air pipe parts respectively arranged on the grabbing assembly and the pulling assembly; The grabbing assembly includes a first grabbing member at a side away from the pulling assembly, and a second grabbing member arranged at a side of the first grabbing member close to the pulling assembly, the second grabbing member is driven by the pulling assembly and moves toward or away from the first grabbing member, the first grabbing member and the second grabbing member are arranged opposite to each other, and the circular shelled magnetic core is located between the opposite positions of the first grabbing member and the second grabbing member; The pulling assembly includes a sliding member for carrying the second grabbing member, a movable plate arranged on the side of the sliding member away from the second grabbing member, and a driving member arranged on the side of the movable plate away from the sliding member, a tension meter is arranged between the sliding member and the movable plate, wherein the driving member drives the movable plate and in turn drives the tension meter and the sliding member to move toward or away from the first grabbing member, so that the current tension is fed back through the tension meter.

[0007] As described above, through the circular structural design of the first grasping member and the second grasping member at the contact part with the circular shelled magnetic core, it can be ensured that the outer surface of the circular shelled magnetic core is effectively adhered to during the grasping process, so as to ensure that the outer surface pressure of the circular shelled magnetic core is uniform during the clamping process and the pulling force is uniformly applied during the pulling process, so as to ensure the accuracy of the data in the subsequent pulling force measurement process. In the existing circular magnetic core pulling test process, multiple sets of clamps are usually used to clamp around the edge of the circular magnetic core, which can easily lead to uneven clamping force and different wear on the outer surface of the circular magnetic core.

[0008] Furthermore, the base assembly includes a bottom plate, a first fixed frame arranged on the top of the bottom plate for supporting the first grabbing member, a slide rail arranged in sequence on the top of the bottom plate and away from the first fixed frame for connecting the second grabbing member, a limit block for limiting the sliding trajectory of the second grabbing member, and a second fixed frame for supporting at least part of the pulling assembly.

[0009] Furthermore, the first grabbing member includes a first cylinder fixedly connected to the first fixed frame, a first output end arranged on the side of the first cylinder facing the second grabbing member, a first movable part movably arranged on the side of the first output end away from the first cylinder, and a first grabbing sleeve arranged on the side of the first movable part away from the first output end.

[0010] Furthermore, the second grabbing member includes a second cylinder fixedly mounted on the sliding member, a second output end arranged on a side of the second cylinder away from the drawing assembly, a second movable part movably arranged on a side of the second output end away from the second cylinder, and a second grabbing sleeve arranged on a side of the second movable part away from the second output end.

[0011] Furthermore, a receiving groove for receiving the circular shelled magnetic core is provided between the first grabbing sleeve and the second grabbing sleeve, and a plurality of edge fasteners are embedded in the circumferential edge of the receiving groove, and the edge fasteners abut against the circumferential surface of the circular shelled magnetic core.

[0012] Furthermore, the sliding member includes a sliding member that is mounted on the sliding rail and slides along the track of the sliding rail, a cylinder mounting platform that is arranged on the side of the sliding member away from the sliding rail and is used to fix the second grabbing member, and a fixed baffle extending outward from the middle of the cylinder mounting platform, and the dynamometer is arranged between the fixed baffle and the movable plate.

[0013] Furthermore, the driving member includes a third cylinder connected to a side of the dynamometer away from the fixed baffle, and a pull rod arranged on a side of the third cylinder away from the dynamometer.

[0014] Furthermore, the output end of the third cylinder is connected to the dynamometer, and the side of the third cylinder away from the pull rod is fixedly connected to the second fixing bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the structure of a round magnetic core pulling test device in an embodiment of the present invention; Figure 2 It is a partial structural schematic diagram of a base assembly in a round magnetic core pulling test device in an embodiment of the present invention; Figure 3 It is a partial structural schematic diagram of a grab assembly in a round magnetic core pulling test device in an embodiment of the present invention; Figure 4 It is a partial structural schematic diagram of a drawing assembly in a round magnetic core drawing test device in an embodiment of the present invention.

[0016] Description of main component symbols:

[0017] The following specific implementations will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0018] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0019] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0021] See also Figures 1 to 4 , shown is a round magnetic core drawing test device in an embodiment of the present invention, comprising a base assembly 1, a grasping assembly 2 arranged on the base assembly 1 for grasping a round shelled magnetic core 3, a drawing assembly 4 arranged on one side of the grasping assembly 2, and an air pipe member 5 respectively arranged on the grasping assembly 2 and the drawing assembly 4, the grasping assembly 2 comprising a first grasping member 21 away from a side of the drawing assembly 4, and a second grasping member 22 arranged on a side of the first grasping member 21 close to the drawing assembly 4, the second grasping member 22 is driven by the drawing assembly 4 and moves toward or away from the first grasping member 21, the first grasping member 2 1 is arranged opposite to the second grasping member 22, the circular shelled magnetic core 3 is located between the opposite positions of the first grasping member 21 and the second grasping member 22, the pulling assembly 4 includes a sliding member for carrying the second grasping member 22, a movable plate 45 arranged on the side of the sliding member away from the second grasping member 22, and a driving member arranged on the side of the movable plate 45 away from the sliding member, a tension meter 44 is arranged between the sliding member and the movable plate 45, wherein the driving member drives the movable plate 45 and in turn drives the tension meter 44 and the sliding member to move toward or away from the first grasping member 21, and the current tension is fed back through the tension meter 44.

[0022] Furthermore, the base assembly 1 includes a bottom plate 11, a first fixing frame 12 arranged on the top of the bottom plate 11 for supporting the first grabbing member 21, a slide rail 13 arranged in sequence on the top of the bottom plate 11 and away from the first fixing frame 12 to connect the second grabbing member 22, a limit block 14 for limiting the sliding trajectory of the second grabbing member 22, and a second fixing frame 15 for supporting at least part of the drawing assembly 4, the first grabbing member 21 includes a first cylinder 211 fixedly connected to the first fixing frame 12, a first output end 212 arranged on the side of the first cylinder 211 facing the second grabbing member 22, and a movable cylinder 211 arranged at the first output end 212 away from the first cylinder 211 The first movable part 213 on one side, and the first grabbing sleeve 214 arranged on the side of the first movable part 213 away from the first output end 212, the second grabbing member 22 includes a second cylinder 221 fixedly mounted on the sliding member 42, a second output end 222 arranged on the second cylinder 221 away from the drawing assembly 4, a second movable part 223 movably arranged on the side of the second output end 222 away from the second cylinder 221, and a second grabbing sleeve 224 arranged on the side of the second movable part 223 away from the second output end 222, and a receiving groove for receiving the circular shelled magnetic core is relatively opened between the first grabbing sleeve 214 and the second grabbing sleeve 224, and the receiving groove is relatively opened between the first grabbing sleeve 214 and the second grabbing sleeve 224. A plurality of edge fasteners 225 are embedded in the circumferential edge of the groove. It should be noted that the edge fasteners 225 are composed of a spring rod fixedly embedded in the edges of the first grabbing sleeve 214 and the second grabbing sleeve 224 and a circular rubber pad on the side of the spring rod away from the first grabbing sleeve 214 and the second grabbing sleeve 224. To ensure that the circular shelled magnetic core 3 is initially grasped by the first grabbing sleeve 214 and the second grabbing sleeve 224 respectively, the edge fasteners 225 can be used to initially clamp the edges of the circular shelled magnetic core 3 according to the external size of the circular shelled magnetic core 3, and the circumferential surface of the circular shelled magnetic core 3 is abutted against the edge fasteners 225 to ensure the stability of the circular shelled magnetic core 3. A sliding member 42 is sleeved on the slide rail 13 and slides along the track of the slide rail 13, a cylinder mounting platform 41 is arranged on the side of the sliding member 42 away from the slide rail 13 and is used to fix the second grabbing member 22, and a fixed baffle 43 extends outward from the middle of the cylinder mounting platform 41, a dynamometer 44 is arranged between the fixed baffle 43 and the movable plate 45, the driving member includes a third cylinder 46 connected to the side of the dynamometer 44 away from the fixed baffle 43, and a pull rod 47 arranged on the side of the third cylinder 46 away from the dynamometer 44, the output end of the third cylinder 46 is connected to the dynamometer 44, and the side of the third cylinder 46 away from the pull rod 47 is fixedly connected to the second fixed frame 15.

[0023] In the specific implementation, the operator can first drive the pulling assembly 4 through the controller to pull the second grabbing member 22 to separate it from the first grabbing member 21. In some optional embodiments of the present invention, the controller can be set at any convenient position of the round magnetic core pulling test device for the operator to operate, and the controller can be an MCU (Microcontroller Unit; microcontroller unit) chip, to achieve overall control of the circular core pulling test device through the MCU chip, wherein the controller is electrically connected to the circular core pulling test device, and the electrical connection includes a wired connection and a wireless connection, and the wireless connection method includes but is not limited to Bluetooth connection, WiFi, IF radio frequency, zigbee, and the wired connection method includes but is not limited to a USB line connecting the circular core pulling test device to the controller, and then the circular shelled magnetic core 3 is placed between the first grasping member 21 and the second grasping member 22 through the awakened pulling assembly 4, wherein it should be noted that the circular shelled magnetic core 3 can be divided into an upper shell in contact with one side of the first grasping member 21 and a lower shell in contact with the second grasping member 22, and the test purpose of the present application is to perform an axial pulling test on the circular shelled magnetic core 3. The test is performed until the outer shells on both sides of the circular shelled magnetic core 3 are pulled apart. After that, the circular shelled magnetic core 3 can be initially clamped by the edge fasteners 225 arranged at the edges of the first grabbing sleeve 214 and the second grabbing sleeve 224 to ensure its stability, so as to ensure that the subsequent first clamping sleeve 214 and the second grabbing sleeve 224 can be accurately clamped when they are retracted toward the circular shelled magnetic core 3. It is further explained that the first grabbing member 21 and the second grabbing member 22 are driven in the same manner, wherein two air pipe members 5 are respectively installed on the first cylinder 211, which correspondingly control the two first movable parts 213 located on the first output end 212, so that the two first movable parts 213 can move along the slide groove on the first output end 212 in a trajectory close to or away from each other, and drive the first grabbing sleeve 214 located on the first movable part 213 to be relatively retracted or expanded, as shown in the accompanying drawings of the specification Figure 3As shown, the first grabbing sleeve 214 is composed of two semicircular sleeves arranged opposite to each other, and the driving distance of the second grabbing member 22 opposite to each other is also the same as that of the first grabbing member 21. Afterwards, the operator can control the first cylinder 211 and the second cylinder 221 respectively to drive the first grabbing sleeve 214 and the second grabbing sleeve 224 to close to the circular shelled magnetic core 3 and complete the clamping operation. The circular design of the first grabbing sleeve 214 and the second grabbing sleeve 224 can effectively fit the outer surface of the circular shelled magnetic core 3 to ensure that the outer surface pressure of the circular shelled magnetic core 3 is uniform during the clamping process, and the data in the subsequent pulling force measurement process is accurate. Furthermore, in order to reduce the first The inner walls of the grabbing sleeve 214 and the second grabbing sleeve 224 are in direct contact with the circular shelled magnetic core 3, causing wear. A peripheral fastener 225 may be added therebetween, wherein the circular rubber pad on the peripheral fastener 225 may serve a protective purpose. At the same time, during the compression process, it may also conform to the surface deformation of the circular shelled magnetic core 3, thereby increasing the tension of the circular shelled magnetic core 3 in the first grabbing sleeve 214 and the second grabbing sleeve 224. In addition, the rubber pad itself also has good protectiveness and anti-slip properties, thereby further ensuring the stability of the circular shelled magnetic core 3 in the first grabbing sleeve 214 and the second grabbing sleeve 224, while improving the protection of the surface of the circular shelled magnetic core 3.

[0024] Furthermore, after the circular shelled magnetic core 3 is stably grasped by the grasping assembly 2, the pulling assembly 4 can be controlled. Specifically, the operator can wake up the third cylinder 46 through the controller, and the third cylinder 46 can drag the second grasping member 22 located on the cylinder mounting platform 41 along the slide rail 13 toward the second fixed frame 15 on the premise that the second fixed frame 15 is a fixed position. During the process, the output end of the third cylinder 46 can pull the dynamometer 44 to link the second grasping member 22 to pull toward the same side, until the circular shelled magnetic core 3 is finally pulled open, and the maximum pulling force value displayed on the dynamometer 44 during the pulling process is obtained and determined as the final transfer force of the current circular shelled magnetic core 3.

[0025] In addition, in order to ensure that the equipment is not bumped due to the pulling force after the circular shelled magnetic core 3 is pulled open, the limit block 14 is designed. It should be noted that the limit block 14 can be made of rubber or sponge pad, which can effectively reduce the reverse impact of the second grabbing member 22 after the pulling is completed, so as to improve the protection of the equipment.

[0026] In summary, through the circular structural design of the first grasping member 21 and the second grasping member 22 in the contact part with the circular shelled magnetic core 3, it can be ensured that the outer surface of the circular shelled magnetic core 3 is effectively fitted during the grasping process, so as to ensure that the outer surface pressure of the circular shelled magnetic core 3 is uniform during the clamping process and the pulling force is uniformly applied during the pulling process, so as to ensure the accuracy of the data in the subsequent pulling force measurement process. In the existing circular magnetic core pulling test process, multiple sets of clamps are usually used to clamp around the edge of the circular magnetic core, which can easily lead to uneven clamping force and different wear on the outer surface of the circular magnetic core.

[0027] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0028] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A round magnetic core pulling test device, characterized in that: It comprises a base assembly, a grabbing assembly arranged on the base assembly for grabbing a circular shelled magnetic core, a drawing assembly arranged on one side of the grabbing assembly, and air pipe parts respectively arranged on the grabbing assembly and the drawing assembly; The grabbing assembly includes a first grabbing member at a side away from the pulling assembly, and a second grabbing member arranged at a side of the first grabbing member close to the pulling assembly, the second grabbing member is driven by the pulling assembly and moves toward or away from the first grabbing member, the first grabbing member and the second grabbing member are arranged opposite to each other, and the circular shelled magnetic core is located between the opposite positions of the first grabbing member and the second grabbing member; The pulling assembly includes a sliding member for carrying the second grabbing member, a movable plate arranged on the side of the sliding member away from the second grabbing member, and a driving member arranged on the side of the movable plate away from the sliding member, a tension meter is arranged between the sliding member and the movable plate, wherein the driving member drives the movable plate and in turn drives the tension meter and the sliding member to move toward or away from the first grabbing member, so that the current tension is fed back through the tension meter.

2. The round magnetic core pulling test device according to claim 1, characterized in that: The base assembly includes a bottom plate, a first fixing frame arranged on the top of the bottom plate for supporting the first grabbing member, a slide rail arranged in sequence on the top of the bottom plate and away from the first fixing frame for connecting the second grabbing member, a limit block for limiting the sliding trajectory of the second grabbing member, and a second fixing frame for supporting at least part of the pulling assembly.

3. The round magnetic core pulling test device according to claim 2, characterized in that: The first grabbing member includes a first cylinder fixedly connected to the first fixing frame, a first output end arranged on the side of the first cylinder facing the second grabbing member, a first movable part movably arranged on the side of the first output end away from the first cylinder, and a first grabbing sleeve arranged on the side of the first movable part away from the first output end.

4. The round magnetic core pulling test device according to claim 3, characterized in that: The second grabbing member includes a second cylinder fixedly mounted on the sliding member, a second output end arranged on a side of the second cylinder away from the drawing assembly, a second movable part movably arranged on a side of the second output end away from the second cylinder, and a second grabbing sleeve arranged on a side of the second movable part away from the second output end.

5. The round magnetic core pulling test device according to claim 4, characterized in that: A receiving groove for receiving the circular shelled magnetic core is provided between the first grabbing sleeve and the second grabbing sleeve. A plurality of edge fasteners are embedded in the circumferential edge of the receiving groove. The edge fasteners abut against the circumferential surface of the circular shelled magnetic core.

6. The round magnetic core pulling test device according to claim 2, characterized in that: The sliding member includes a sliding member that is sleeved on the sliding rail and slides along the track of the sliding rail, a cylinder mounting platform that is arranged on the side of the sliding member away from the sliding rail and is used to fix the second grabbing member, and a fixed baffle extending outward from the middle of the cylinder mounting platform, and the dynamometer is arranged between the fixed baffle and the movable plate.

7. The round magnetic core pulling test device according to claim 6, characterized in that: The driving member comprises a third cylinder connected to a side of the dynamometer away from the fixed baffle, and a pull rod arranged on a side of the third cylinder away from the dynamometer.

8. The round magnetic core pulling test device according to claim 6, characterized in that: The output end of the third cylinder is connected to the dynamometer, and the side of the third cylinder away from the pull rod is fixedly connected to the second fixing frame.

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