Magnetic force testing tool

Abstract

The utility model relates to the technical field of electromagnetic force detection equipment, and specifically discloses a magnetic force test tool. Comprising a base, a positioning mechanism and a magnetic test piece mounting mechanism, four corners of the base are fixed on the test platform through bottom feet matched with bolts, and the upper surface of the base is provided with a double-station mounting structure formed by a base table and a substrate; the positioning mechanism is vertically arranged on the base station and is matched with the leading-out device; the magnetic force test piece installation mechanisms are symmetrically arranged on the substrate and are matched with the magnetic force test pieces. The axis of the positioning mechanism and the axis of the test piece mounting mechanism are designed to be 90-degree vertical layout, so that decoupling of a magnetic field action direction and a mechanical detection direction is realized; interference of a magnetic field on the pressure sensor is avoided, meanwhile, it is ensured that magnetic force is completely converted into axial movement of the mounting plate, and the measurement precision is remarkably improved. The problems that a traditional magnetic force testing tool is insufficient in measurement precision and stability and poor in operation efficiency and adaptability are solved.

Description

Technical Field

[0001] This utility model belongs to the technical field of electromagnetic force testing equipment, specifically, it relates to a magnetic force testing fixture. Background Technology

[0002] In the design and fabrication of a 45 GHz ECR ion source, the downstream extraction device (including plasma electrodes, extraction electrodes, and accelerating electrodes) is responsible for efficiently and stably converting the plasma in a high confinement magnetic field into a high-quality ion beam. Since even small deviations under ultra-high magnetic fields (approximately 1.6 T) can lead to the failure of electron cyclotron resonance (ECR) conditions or the degradation of plasma confinement quality, which in turn severely affects the intensity and stability of the extracted beam, accurate magnetic force testing is an indispensable prerequisite for the extraction device to achieve its expected performance.

[0003] Existing magnetic testing fixtures face core accuracy and stability challenges when testing extraction devices from 45 GHz ECR ion sources (corresponding to an ultra-high magnetic field of approximately 1.6 T). First, the magnetic field and mechanical detection directions are not decoupled. The pressure sensor is often located on the path of strong magnetic field lines, which not only significantly distorts the measured magnetic field due to the ferromagnetic material, leading to inaccurate field strength and distribution, but also makes the sensor output susceptible to interference from the strong magnetic field, resulting in severe reading drift. Second, the test component mounting structure (such as sliders / grooves) has high frictional resistance and is prone to wobbling, making it difficult to accurately transmit micro-Newton-level magnetic forces to the sensor. Especially under high field strength, minute changes in magnetic force are easily drowned out by frictional noise. Furthermore, the lack of an effective demagnetization design causes eddy currents to be generated in the fixture's metal components in the strong variable magnetic field, creating background interference magnetic fields that further reduce the signal-to-noise ratio and measurement reliability. Simultaneously, existing solutions are cumbersome to operate and have poor adaptability when testing 45 GHz ECR ion sources with ultra-high field and high precision requirements. The key problem lies in the lack of an efficient and precise adjustment mechanism: micron-level rapid alignment of the extraction device is impossible, manual and repeated adjustments are time-consuming and prone to introducing errors; the distance adjustment between the test piece and the working surface of the extraction device relies on overall disassembly and reassembly or coarse adjustment mechanisms, making it impossible to complete multi-distance gradient detection in a single clamping operation, and difficult to obtain high-resolution magnetic force-distance decay curves. Simultaneously, operating components (such as handwheels) are easily magnetized and jammed when located in strong magnetic field areas, making maintenance difficult. The size, shape, or material of ordinary test pieces (such as those containing ferromagnetic materials) is incompatible with the extraction device, failing to realistically simulate plasma boundary conditions, leading to measurement results deviating from actual operating conditions. These problems collectively restrict the efficiency and data reliability of the research and optimization of ultra-high magnetic field equipment.

[0004] Based on this, the present invention provides a magnetic force testing fixture to solve the problems existing in the prior art. Utility Model Content

[0005] In view of this, the main objective of this utility model is to provide a magnetic force testing fixture to solve the problems of insufficient measurement accuracy and stability, as well as deficiencies in operation efficiency and adaptability of traditional magnetic force testing fixtures.

[0006] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0007] A magnetic force testing fixture, characterized in that it includes a base, a positioning mechanism, and a magnetic force test piece mounting mechanism;

[0008] The base is fixed to the test platform by foot bolts at its four corners, and its upper surface is provided with a base and a base plate to form a dual-station installation structure.

[0009] The positioning mechanism is vertically mounted on the base and is matched with the lead-out device;

[0010] The magnetic test piece mounting mechanism is symmetrically arranged on the substrate and matches the magnetic test piece; and the positioning mechanism is arranged at 90° to the axis of the magnetic test piece mounting mechanism.

[0011] In a preferred embodiment, the positioning mechanism includes a positioning component and an adjustment component;

[0012] The positioning components are symmetrically mounted on the base and are matched with the lead-out device;

[0013] The adjustment component is located inside the base and is connected to the positioning component.

[0014] In a preferred embodiment, the positioning assembly includes a positioning plate, an L-shaped positioning element, and a first adjusting rod;

[0015] The positioning plate is a plate-shaped structure, and a first slider is provided at its bottom. The first slider is slidably connected to a first groove opened on the base.

[0016] The positioning components are movably mounted on the positioning plate and are arranged symmetrically.

[0017] The first adjusting rod is rotatably mounted on the positioning plate and is threadedly connected to two symmetrical L-shaped positioning parts.

[0018] In a preferred embodiment, two guide grooves and one movable groove are provided on the inner surface of the positioning plate, and the three are arranged in parallel; the two guide grooves are symmetrically distributed on both sides of the movable groove, and a guide block is provided on the back side of the positioning member to match the guide groove; the movable groove is rotatably connected to the first adjusting rod and engages with the locking block on the back side of the positioning member; the first adjusting rod is a bidirectional lead screw.

[0019] In a preferred embodiment, one end of the first adjusting rod extends to the outside of the positioning plate, and a first handwheel is provided at the end of the first adjusting rod.

[0020] In a preferred embodiment, the adjustment assembly includes a second handwheel, a transmission chain, and a second adjustment lever;

[0021] The second adjusting rod is rotatably disposed in the first sliding groove and threadedly connected to the first slider, and a driven gear is fixedly connected to one end of the second adjusting rod extending to the outside of the base.

[0022] The second handwheel is rotatably mounted on the base, and its transmission rod extends to the outside of the base and is connected to a drive gear;

[0023] The transmission chain is fitted on the outside of the driving gear and the driven gear, and meshes with both.

[0024] In a preferred embodiment, the second adjusting rod is a bidirectional lead screw.

[0025] In a preferred embodiment, the magnetic test piece mounting mechanism includes a mounting plate with a plurality of positioning holes that match the magnetic test piece; a second slider is also provided at the lower end of the mounting plate, and the second slider is slidably connected to a second groove provided on the substrate.

[0026] In a preferred embodiment, the magnetic test piece is a plate-shaped structure that is the same size as and matches the working surface of the lead-out device under test.

[0027] In a preferred embodiment, a testing mechanism is also mounted on the substrate. The testing mechanism includes a movable component, which is slidably mounted in a second slide groove via a lower locking block, and a pressure sensor is provided in the middle of the movable component. Positioning bolts are threaded to both ends of the movable component, and the positioning bolts are threaded to threaded holes provided at the bottom of the second slide groove.

[0028] Compared with the prior art, the present invention provides a magnetic force testing fixture, which has the following beneficial effects:

[0029] 1. Vertical dual-station magnetic-force decoupling layout: By designing the axes of the positioning mechanism and the test piece mounting mechanism to be perpendicular to each other at 90°, the direction of magnetic field action and the direction of mechanical detection are decoupled. This structure avoids the interference of the magnetic field on the pressure sensor, while ensuring that the magnetic force is completely converted into the axial movement of the mounting plate, which significantly improves the measurement accuracy.

[0030] 2. A decomposed adjustment mechanism is employed, using a bidirectional lead screw-type first adjusting rod to drive symmetrical L-shaped positioning components, achieving micron-level centering and clamping of the lead-out device. A chain-driven second adjusting rod controls the spacing of the positioning plates along the first sliding groove, adapting to equipment of different sizes. Simultaneously, a second handwheel, via a transmission chain, moves the operating end outward to a low magnetic field region, preventing the metal tool from being magnetized.

[0031] 3. Low-friction, high-stability force transmission structure: The test piece mounting mechanism adopts a trapezoidal locking second slider and second groove, which reduces the friction coefficient of the smooth surface. At the same time, the trapezoidal structure suppresses lateral displacement, ensuring that the magnetic force is transmitted to the pressure sensor without loss. The pressure sensor is installed on the lower side of the mounting plate, avoiding the path of the main magnetic field line and eliminating the distortion effect of the ferromagnetic material of the sensor on the magnetic field.

[0032] 4. The adjustable gradient detection module, through the cooperation of the positioning bolt and multiple sets of threaded holes, realizes the step adjustment of the distance between the test piece and the working surface of the lead-out device, and can support the completion of multi-distance magnetic gradient detection in a single clamping.

[0033] 5. The test piece is made of non-magnetic material and is the same size as the working surface of the extraction device, which can realistically simulate working conditions. This solves the problems of insufficient measurement accuracy and stability, as well as operational efficiency and adaptability defects in traditional magnetic force testing fixtures. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the structure of the magnetic force testing fixture of this utility model;

[0036] Figure 2 This is a schematic diagram of the structure of the base of this utility model;

[0037] Figure 3 This is an exploded view of the positioning component of this utility model;

[0038] Figure 4 This is a top-view sectional view of the base of this utility model;

[0039] Figure 5 This is a top view of the magnetic force testing fixture of this utility model in use.

[0040] Figure 6 This is a schematic diagram of the magnetic force test piece mounting mechanism of this utility model;

[0041] Figure 7 This is a schematic diagram of the structure of the testing mechanism of this utility model.

[0042] [Explanation of Key Component Symbols]

[0043] 1. Base; 11. Platform; 12. Base plate; 13. First slide groove; 14. Second slide groove; 15. Threaded hole; 2. Foot; 3. Positioning mechanism; 31. Positioning plate; 311. Guide groove; 312. Movable groove; 313. First slider; 32. Positioning component; 321. Guide block; 322. Locking block; 33. First adjusting rod; 34. Driven gear; 35. Driven gear; 36. Second handwheel; 37. Transmission chain; 38. Second adjusting rod; 4. Magnetic test piece mounting mechanism; 41. Mounting plate; 42. Second slider; 5. Testing mechanism; 51. Movable component; 52. Pressure sensor; 53. Positioning bolt; 6. Magnetic test piece; 7. Lead-out device. Detailed Implementation

[0044] The structure of the magnetic force testing fixture will be further described in detail below with reference to the accompanying drawings and embodiments of the present invention.

[0045] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0046] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments as described in this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0047] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0048] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 9 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0049] As per the instruction manual Figures 1-7 As shown, this utility model provides a technical solution:

[0050] A magnetic force testing fixture includes a base 1, a positioning mechanism 3, and a magnetic test piece mounting mechanism 4. The base 1 is fixed to a testing platform at its four corners via foot 2 and bolts. Its upper surface is provided with a base 11 and a base plate 12, forming a dual-station mounting structure. The positioning mechanism 3 is vertically mounted on the base 11 and is used to fix an energized lead-out device 7. The magnetic test piece mounting mechanism 4 is symmetrically arranged on the base plate 12 and is used to clamp and fix the magnetic test piece 6, facilitating the application of magnetic force to the magnetic test piece 6 using the lead-out device 7 during use. Furthermore, the positioning mechanism 3 and the magnetic test piece mounting mechanism 4 are arranged perpendicularly at 90° to each other to ensure the accuracy of the test geometry.

[0051] During testing, the fixture is first secured to the test platform using foot 2. Then, the lead-out device 7 is fixed using positioning mechanism 3 and energized to generate the magnetic field to be measured. Next, the non-magnetic magnetic test piece 6 is mounted onto the magnetic test piece mounting mechanism 4. At this point, the test mechanism 5 (including pressure sensor 52) located on the base plate 12 is manipulated to contact the magnetic test piece 6 on the magnetic test piece mounting mechanism 4. Finally, the pressure sensor 52 of the test mechanism 5 measures the magnetic force acting on the magnetic test piece 6 (expressed as pressure on the pressure sensor 52), completing a quantitative assessment of the magnetic attraction or repulsion force of the lead-out device 7.

[0052] In a preferred embodiment, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the positioning mechanism 3 includes a positioning component and an adjustment component; the positioning component is symmetrically installed on the base 11 and is used in conjunction with the lead-out device 7 to clamp and fix the lead-out device 7; the adjustment component is located inside the base 11 and is connected to the positioning component to adjust the movement of the two positioning components toward each other or away from each other.

[0053] Specifically, such as Figure 1 and Figure 3 As shown, the positioning assembly includes a positioning plate 31, L-shaped positioning elements 32, and a first adjusting rod 33. The positioning plate 31 is a plate-shaped structure with a first slider 313 at its bottom. The first slider 313 is slidably connected to a first groove 13 formed on the base 11, allowing the entire positioning plate 31 to move along the direction of the first groove 13. Two L-shaped positioning elements 32 are movably mounted on the positioning plate 31 and arranged symmetrically. The first adjusting rod 33 is rotatably mounted on the positioning plate 31 and threadedly connected to the two symmetrical L-shaped positioning elements 32. By rotating the first adjusting rod 33, the two L-shaped positioning elements 32 can be driven to move in opposite directions or away from each other in a linear motion. This adjustment mechanism is used to clamp (movement in opposite directions) or release (movement away from each other) the lead-out device 7 during operation, thereby achieving its precise positioning.

[0054] More specifically, two guide grooves 311 and one movable groove 312 are machined on the inner surface of the positioning plate 31, and the three are arranged in parallel. The two guide grooves 311 are symmetrically distributed on both sides of the movable groove 312. A guide block 321 is provided on the back side of the L-shaped positioning member 32, which cooperates with the guide groove 311 to form a snap-fit ​​connection, ensuring that the positioning member 32 slides along a predetermined path when moving. The movable groove 312 is used to accommodate and constrain the rotation of the first adjusting rod 33, and engages with the locking block 322 on the back side of the positioning member 32. The first adjusting rod 33 is a bidirectional lead screw, whose threads mesh with the two locking blocks 322. When the first adjusting rod 33 is rotated, the two locking blocks 322, together with the fixed positioning member 32, are driven to make precise opposite or opposite movements under the guidance of the movable groove 312 through the transmission of the lead screw-nut pair, thereby realizing the clamping or releasing of the test lead-out device 7.

[0055] More specifically, the first slide groove 13 is a trapezoidal slide groove with a small opening and a large inner side, and is used in conjunction with the shape of the first slide groove 13 to ensure the stability of the positioning plate 31 during movement.

[0056] More specifically, the locking block 322 is provided with a threaded hole that is threadedly connected to the first adjusting rod 33. The guide block 321 and the guide groove 311, the movable groove 312 and the locking block 322 are all tightly engaged to ensure the stability of the positioning component 32 during the adjustment process.

[0057] More specifically, one end of the first adjusting rod 33 extends to the outside of the positioning plate 31, and a first handwheel 331 is provided at the end of the first adjusting rod 33 for adjusting the relative position relationship between the two positioning members 32 by rotating the first handwheel 331 during use.

[0058] Specifically, such as Figure 1 , Figure 2 and Figure 4 As shown, the adjustment assembly includes a second handwheel 36, a transmission chain 37, and a second adjustment rod 38. The second adjustment rod 38 is rotatably mounted in the first slide groove 13 and threadedly connected to the first slider 313. A driven gear 34 is fixedly connected to one end of the second adjustment rod 38 extending to the outside of the base 11. The second handwheel 36 is rotatably mounted on the base 11 via a bearing, and its transmission rod extends to the outside of the base 11 and is fixedly mounted with a driving gear 35. The transmission chain 37 is fitted around the outside of the driving gear 35 and the driven gear 34, meshing with both. Through the linkage of the transmission chain 37, the second handwheel 36 and the second adjustment rod 38 are connected to form a linkage adjustment mechanism. This allows rotating the second handwheel 36 to drive the second adjustment rod 38 to rotate, thereby driving the first slider 313 (and its connected positioning plate 31) to move within the first slide groove 13 via threaded transmission, achieving the adjustment of the two positioning plates 31's relative or distancing movements.

[0059] More specifically, the second adjusting rod 38 is a two-way lead screw, used to adjust the movement of the first slider 313 towards or away from each other, thereby adjusting the movement of the two positioning plates 31 towards or away from each other.

[0060] In a preferred embodiment, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the magnetic test piece mounting mechanism 4 includes a mounting plate 41 with several positioning holes for positioning the magnetic test piece 6 to be installed. In use, bolts are passed through the positioning holes to secure the mounting plate 41 to the magnetic test piece 6, thus completing the installation and fixing of the magnetic test piece 6. Simultaneously, the main function of the mounting plate 41 is to support the fixed magnetic test piece 6 and effectively transmit and convert the magnetic force (attraction or repulsion) experienced by the magnetic test piece 6 in the magnetic field into a tendency for the mounting plate 41 to move. This tendency for movement forms the basis for subsequent quantitative magnetic force measurement using the testing mechanism 5.

[0061] Specifically, a second slider 42 is provided at the lower end of the mounting plate 41. The second slider 42 is slidably connected to the second slide groove 14 provided on the base plate 12. Both the surfaces of the second slider 42 and the second slide groove 14 are smooth surfaces to reduce friction and ensure the magnetic detection accuracy of the lead-out device 7. The structure of the second slider 42 is a trapezoidal structure that matches the second slide groove 14. The mutual engagement of the two can ensure the stability of the mounting plate 41 during movement.

[0062] Specifically, the magnetic force test piece 6 is a plate-shaped structure that is the same size as and matches the working surface of the lead-out device 7 under test, and is used to fully receive the magnetic force from the working surface of the lead-out device 7 under test to ensure test accuracy.

[0063] In a preferred embodiment, such as Figure 1 , Figure 2 and Figure 7 As shown, the testing mechanism 5 includes a movable part 51, which is slidably installed in the second slide groove 14 via a lower locking block. A pressure sensor 52 is installed in the middle of the movable part 51 and contacts the mounting plate 41 for detecting the pressure of the mounting plate 41.

[0064] Specifically, the pressure sensor 52 is mounted on the lower side of the mounting plate 41. This arrangement aims to reduce the interference that the pressure sensor 52 itself and its surrounding surface may cause to the magnetic force propagation path, thereby ensuring the accuracy of the magnetic force test.

[0065] Specifically, both ends of the movable part 51 are threadedly connected to positioning bolts 53. These positioning bolts 53 cooperate with the threaded holes 15 located at the bottom of the second slide groove 14. Their functions are twofold: first, to fix the position of the movable part 51 by tightening the positioning bolts 53; and second, to precisely adjust the distance between the magnetic force test piece 6 and the working surface of the lead-out device 7 by screwing the positioning bolts 53 into the threaded holes 15 at different positions at the bottom of the second slide groove 14. This design enables the detection of magnetic force gradients at different distances.

[0066] The working principle of the magnetic force testing fixture described in this utility model includes:

[0067] Step 1: Secure the base 1 to the test platform using the feet 2 and bolts;

[0068] Use the first adjusting rod 33 to adjust the L-shaped positioning piece 32 to clamp the lead-out device 7; rotate the second handwheel 36, and drive the second adjusting rod 38 through the transmission chain 37 to adjust the spacing of the positioning plate 31 to adapt to the size of the lead-out device 7.

[0069] Step 2: Installation and position calibration of the magnetic test piece;

[0070] The non-magnetic magnetic force test piece 6 (with the same size as the working surface of the lead-out device 7) is fixed to the mounting plate 41 with bolts; the initial distance between the magnetic force test piece 6 and the lead-out device 7 is adjusted by using the positioning bolt 53 to cooperate with different threaded holes 15.

[0071] Step 3: Magnetic field loading and force measurement;

[0072] The device 7 is powered on to generate the magnetic field to be measured. The magnetic force acts on the magnetic force test piece 6, pushing the mounting plate 41 to move along the second slide groove 14. The pressure sensor 52 of the movable part 51 contacts the lower side of the mounting plate 41 to detect the motion resistance (i.e. the magnitude of the magnetic force) in real time.

[0073] Step 4: Gradient detection;

[0074] Loosen the positioning bolt 53 and move the movable part 51 to the position of another set of threaded holes 15 on the second slide groove 14; re-fix the positioning bolt 53 and change the distance between the magnetic force test piece 6 and the lead-out device 7.

[0075] Repeat step 3 to obtain the magnetic force values ​​at different distances and calculate the magnetic field gradient.

[0076] Step 5: Data Analysis;

[0077] Record the output data of pressure sensor 52, and plot the magnetic force-distance curve in combination with the spacing parameter; evaluate the uniformity of magnetic field strength, attenuation characteristics and engineering applicability.

[0078] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model.

Claims

1. A magnetic force testing fixture, characterized in that, It includes a base (1), a positioning mechanism (3), and a magnetic test piece mounting mechanism (4); The base (1) is fixed to the test platform by the four corners of the base (2) and bolts. The upper surface of the base is provided with a base (11) and a base plate (12) to form a dual-station installation structure. The positioning mechanism (3) is vertically mounted on the base (11) and is matched with the lead-out device (7); The magnetic test piece mounting mechanism (4) is symmetrically arranged on the substrate (12) and matches the magnetic test piece (6); and the positioning mechanism (3) is arranged at 90° with the axis of the magnetic test piece mounting mechanism (4).

2. The magnetic force testing fixture as described in claim 1, characterized in that, The positioning mechanism (3) includes a positioning component and an adjustment component; The positioning components are symmetrically mounted on the base (11) and are matched with the lead-out device (7); The adjustment component is located inside the base (11) and is connected to the positioning component.

3. The magnetic force testing fixture as described in claim 2, characterized in that, The positioning assembly includes a positioning plate (31), an L-shaped positioning element (32), and a first adjusting rod (33). The positioning plate (31) is a plate-shaped structure, and a first slider (313) is provided at its bottom. The first slider (313) is slidably connected to a first groove (13) opened on the base (11). The positioning element (32) is movably mounted on the positioning plate (31) and arranged symmetrically; The first adjusting rod (33) is rotatably mounted on the positioning plate (31) and threadedly connected to two symmetrical L-shaped positioning parts (32).

4. The magnetic force testing fixture as described in claim 3, characterized in that, Two guide grooves (311) and one movable groove (312) are provided on the inner surface of the positioning plate (31), and the three are arranged in parallel; the two guide grooves (311) are symmetrically distributed on both sides of the movable groove (312), and the back side of the positioning member (32) is provided with a guide block (321) that matches the guide groove (311); the movable groove (312) is rotatably connected to the first adjusting rod (33) and engages with the locking block (322) on the back side of the positioning member (32); the first adjusting rod (33) is a two-way lead screw.

5. A magnetic force testing fixture as described in claim 3, characterized in that, One end of the first adjusting rod (33) extends to the outside of the positioning plate (31), and a first handwheel (331) is provided at the end of the first adjusting rod (33).

6. The magnetic force testing fixture as described in claim 3, characterized in that, The adjustment assembly includes a second handwheel (36), a transmission chain (37), and a second adjustment rod (38); The second adjusting rod (38) is rotatably disposed in the first slide groove (13) and threadedly connected to the first slider (313), and a driven gear (34) is fixedly connected to one end of the second adjusting rod (38) extending to the outside of the base (11). The second handwheel (36) is rotatably mounted on the base (11), and its transmission rod extends to the outside of the base (11) and is connected to the drive gear (35). The transmission chain (37) is fitted on the outside of the driving gear (35) and the driven gear (34) and meshes with both.

7. A magnetic force testing fixture as described in claim 6, characterized in that, The second adjusting rod (38) is a two-way lead screw.

8. The magnetic force testing fixture as described in claim 1, characterized in that, The magnetic test piece mounting mechanism (4) includes a mounting plate (41), which has a plurality of positioning holes that match the magnetic test piece (6); a second slider (42) is also provided at the lower end of the mounting plate (41), and the second slider (42) is slidably connected to a second sliding groove (14) provided on the substrate (12).

9. A magnetic force testing fixture as described in claim 1, characterized in that, The magnetic test piece (6) is a plate-shaped structure that is the same size as and matches the working surface of the lead-out device (7) to be tested.

10. A magnetic force testing fixture as described in claim 8, characterized in that, The substrate (12) is also equipped with a testing mechanism (5), which includes a movable part (51). The movable part (51) is slidably installed in the second slide groove (14) by a lower side block, and a pressure sensor (52) is provided in the middle of the movable part (51). The two ends of the movable part (51) are also threadedly connected with positioning bolts (53), and the positioning bolts (53) are threadedly connected to the threaded holes (15) provided at the bottom of the second slide groove (14).

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