Positioning jig for magnetic declination test of magnet product

Abstract

The utility model discloses a positioning tool for magnetic declination testing of a magnet product, the upper end face of a bottom plate is provided with a positioning groove for placing the product, a positioning plate is arranged on the bottom plate, one side of the positioning plate is provided with a guide groove vertically penetrating through the body of the positioning plate, and the vertical projection of the positioning groove is located in the guide groove. A receding groove vertically penetrating through a body of the pressing plate is formed in one corner of the pressing plate, the pressing plate abuts against the bottom plate and is inserted into the guide groove, the pressing plate at least partially covers the positioning groove, the receding groove is at least partially communicated with the positioning groove, and the pressing plate is fixed to the bottom plate and / or the positioning plate through the positioning structure. According to the utility model, the pressing plate covers the magnet product in the positioning groove, and the receding groove is communicated with part of the positioning groove, so that the magnet product can be observed, the position stability of the magnet product in a material moving process or a magnetic field test process is ensured, and the magnet product cannot be separated from the positioning groove; and it can be ensured that a magnet product is arranged in the positioning groove for testing, and testing effectiveness and testing accuracy are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of magnet processing equipment, in particular to a positioning fixture for testing the magnetic deflection angle of a magnet product. Background Art

[0002] Magnetic products are widely used in various electronic products. For example, strong magnetic magnets with magnetic declination are used in the accessories of smart watches. The magnetic declination is 20°, 24.8°, etc. In order to ensure that the various indicators of the magnetic product meet the use requirements, multiple tests are required, among which magnetic declination is also a test indicator.

[0003] The magnetic deflection test of strong magnetic magnet products can be carried out by fixing the magnet product with a fixture and placing it in a three-dimensional Helmholtz coil device for testing. For example, a magnetic deflection test tool for special-shaped products with application number 202321403570.6 uses a combination of snap-on and clamping to fix the product and can adjust the angle accordingly. However, for special-shaped products, the product needs to have an internal notch for snapping onto the fixed clamp rod, which also limits the application of the test tool. Utility Model Content

[0004] The purpose of the utility model is to provide a positioning fixture for testing the magnetic deflection of a magnet product, wherein the pressure plate portion covers the magnet product in the positioning groove, and the clearance groove can be connected to part of the positioning groove so that the magnet product can be observed, thereby ensuring the position stability of the magnet product during material transfer or testing in a magnetic field, and the magnet product will not leave the positioning groove. It can also be ensured that there is a magnet product in the positioning groove for testing, thereby ensuring the effectiveness and accuracy of the test.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a positioning fixture for testing the magnetic deflection of a magnet product, comprising:

[0006] The bottom plate has a positioning groove on its upper end surface for placing products.

[0007] A positioning plate is arranged on the bottom plate, and a guide groove is provided on one side of the positioning plate vertically penetrating the body thereof, and a vertical projection of the positioning groove is located in the guide groove.

[0008] A pressing plate, one corner of which is provided with a clearance groove vertically penetrating the main body thereof, the pressing plate abuts against the bottom plate and is inserted into the guide groove, the pressing plate at least partially covers the positioning groove, and the clearance groove is at least partially connected to the positioning groove,

[0009] A positioning structure fixes the pressing plate to the base plate and / or the positioning plate.

[0010] As a further optimization, the positioning plate is adhered to the base plate, preferably by evenly applying glue to the lower end surface of the positioning plate for fixing and adhering.

[0011] As a further optimization, at least part of the vertical projections of the opposite side walls of the positioning plate are located on the bottom plate.

[0012] As a further optimization, the base plate is provided with a mounting groove, the positioning plate is provided with a positioning piece, and the positioning piece is embedded in the mounting groove. The cooperation of the two can ensure the position accuracy of the positioning plate on the base plate.

[0013] As a further optimization, the positioning structure includes a locking column, a bottom hole arranged on the bottom plate, and a waist hole arranged on the pressure plate. After the locking column passes through the waist hole, it is locked in the bottom hole to fix the pressure plate on the bottom plate.

[0014] As a further optimization, the positioning structure includes a slot arranged on the positioning plate and connected to the guide groove, and an insert plate is provided on the pressure plate beside the give way groove, and the insert plate is interference fit in the slot.

[0015] As a further optimization, an arc-shaped embedding groove is provided on the side wall of the slot, and an arc-surface embedding block is provided on the plug plate. The arc-surface embedding block is embedded in the arc-shaped embedding groove, so as to further improve the stability of horizontal insertion.

[0016] As a further optimization, the positioning structure also includes guide belts arranged on the opposite side walls of the pressure plate, and slide grooves arranged on the opposite side walls of the guide groove. The guide belts can be horizontally slidable in the slide grooves, which can ensure that the pressure plate will not leave the guide grooves in the vertical direction.

[0017] As a further optimization, the guide belt and the slide groove are respectively arranged in the middle of the pressure plate and the guide groove.

[0018] As a further optimization, the bottom plate, positioning plate, pressure plate and positioning structure are all made of non-metallic materials, such as hard plastic materials.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] 1. The covering part of the pressing plate is located on the magnet product in the positioning groove, and the clearance groove can be connected to part of the positioning groove so that the magnet product can be observed, ensuring the position stability of the magnet product during the material transfer process or the test in the magnetic field. The magnet product will not leave the positioning groove, and it can also ensure that there is a magnet product in the positioning groove for testing, ensuring the effectiveness and accuracy of the test;

[0021] 2. The positioning structure can ensure the stable coverage of the pressing plate on the product, thereby ensuring the position stability of the product. Brief Description of the Drawings

[0022] Figure 1 It is a structural diagram of the present utility model.

[0023] Figure 2 It is a schematic exploded view of the present utility model.

[0024] Figure 3 It is a structural diagram of the positioning plate in another embodiment of the present utility model.

[0025] Figure 4 It is a structural diagram of the pressing plate in another embodiment of the present utility model.

[0026] Figure 5 It is an installation schematic diagram of the pressing plate and the positioning plate in another embodiment of the present utility model. Detailed Description of the Preferred Embodiments

[0027] The following are specific embodiments of the present utility model in combination with the accompanying drawings to further describe the technical solutions of the present utility model, but the present utility model is not limited to these embodiments.

[0028] As Figures 1 to 2 shown, in one embodiment of the present utility model, a positioning fixture for testing the magnetic declination of a magnet product includes a bottom plate 1, a positioning plate 2, a pressing plate 3, and a positioning structure. A positioning groove 101 for placing the product is provided on the upper end surface of the bottom plate 1. The positioning plate 2 is disposed on the bottom plate 1, and the positioning plate 2 and the bottom plate 1 can be fixedly connected by glue pasting. A guide groove 201 vertically penetrating its body is provided on one side of the positioning plate 2. The vertical projection of the positioning groove 101 is located in the guide groove 201. A relief groove 301 vertically penetrating its body is provided at a corner of the pressing plate 3. The pressing plate 3 abuts against the bottom plate 1 and is inserted into the guide groove 201. The pressing plate 3 at least partially covers the positioning groove 101, and the relief groove 301 is at least partially communicated with the positioning groove 101. The positioning structure fixes the pressing plate 3 on the bottom plate 1. The positioning structure may include a locking column 4, a bottom hole 103 provided on the bottom plate 1, and a waist-shaped hole 302 provided on the pressing plate 3. The locking column 4 passes through the waist-shaped hole 302 and is locked in the bottom hole 103 to fix the pressing plate 3 on the bottom plate 1. The longer hole-shaped structure of the waist-shaped hole 302 is easy to align with the bottom hole 103.

[0029] In this embodiment, the positioning plate 2 is fixedly connected to the bottom plate 1. The magnet product to be tested for magnetic declination is placed in the positioning groove 101. The lower end surface of the pressing plate 3 is abutted against the upper end surface of the bottom plate 1, and the pressing plate 3 is translated on the bottom plate 1 and inserted into the guide groove 201 until one end of the pressing plate 3 extending into the guide groove 201 abuts against the inner wall of the guide groove 201. At this time, the pressing plate 3 covers part of the positioning groove 101 and part of the magnet product. Due to the existence of the relief groove 301, the other part of the positioning groove 101 and the other part of the magnet product are exposed and observable. Then, the pressing plate 3 and the bottom plate 1 are fixed by the locking column 4 to complete the positioning of the magnet product by this positioning jig. Then, the whole is placed in a testing device (such as a three-dimensional composite Helmholtz coil device) for magnetic declination testing.

[0030] In the present utility model, the pressing plate 3 can partially cover the magnet product located in the positioning groove 101, and the relief groove 301 on the pressing plate 3 can communicate with part of the positioning groove 101 so that the magnet product can be observed. Therefore, it can ensure the position stability of the magnet product during the process of feeding it to the testing device, during the testing process in the magnetic field, and during the discharging process from the testing device. For example, it will not cause the smaller magnet product to fall out after detaching from the positioning groove 101 due to the instability of moving the positioning jig, nor will it cause the position of the magnet product to be unstable due to the acting force of the magnetic field in the magnetic field. Therefore, the magnet product will not detach from the positioning groove, and it can also (due to being observable) ensure that there is a magnet product in the positioning groove for testing, guaranteeing the effectiveness and accuracy of the testing, and thus improving the testing efficiency.

[0031] Furthermore, at least part of the vertical projections of the opposite side walls of the positioning plate 2 are located on the bottom plate 1. Preferably, the width of the positioning plate 2 is less than or equal to the width of the bottom plate 1. After applying glue to the contact surfaces of the positioning plate 2 and the bottom plate 1, they are pasted and fixed.

[0032] Preferably, the bottom plate 1 is provided with an installation groove 102, and the positioning plate 2 is provided with a positioning piece 202. The positioning piece 202 is embedded in the installation groove 102. The cooperation between the positioning piece 202 and the installation groove 102 can ensure the accurate position of the positioning plate 2 installed on the bottom plate 1, and thus can ensure the accurate extension of the guide groove 201.

[0033] Combined with Figures 3 to 5 As shown in the figure, in another embodiment of the present utility model, the difference from the above embodiment is that the positioning structure includes a slot 202 provided on the positioning plate 2 and communicating with the guide groove 201. An insertion plate 31 is provided on the pressing plate 3 beside the relief groove 301. The insertion plate 31 is press-fitted into the slot 202. The pressing plate 3 is fixed to the bottom plate 1 in the form of press-fitting, avoiding the step of fixing by the locking column 4, and the operation is more convenient.

[0034] Furthermore, an arc-shaped embedding groove 204 can be provided on the side wall of the slot 202, and an arc-shaped embedding block 33 is provided on the insertion plate 31. The arc-shaped embedding block 33 is embedded in the arc-shaped embedding groove 204, so that on the basis of interference fit, clamping connection can be further carried out to ensure the connection stability, and the arc-shaped structures of each other are easy to realize insertion and detachment under the action of external force.

[0035] The above structure realizes stable connection in the horizontal direction. In order to ensure the installation stability in the vertical direction, the positioning structure further includes guide belts 32 provided on the opposite side walls of the pressing plate 3 and sliding grooves 203 provided on the opposite side walls of the guide groove 201. The guide belts 32 are slidably arranged in the sliding grooves 203 horizontally.

[0036] Therefore, the pressing plate 3 can be fixed to the positioning plate 2 by the limitation of the guide belts 32 and the sliding grooves 203 in the vertical direction and the interference insertion (including the arc-shaped embedding block 33 and the arc-shaped embedding groove 204) in the horizontal direction.

[0037] In addition, preferably, the guide belts 32 and the sliding grooves 203 are respectively arranged in the middle of the pressing plate 3 and the guide groove 201, that is, no matter the pressing plate 3 is used on the front or the back, it can be accurately inserted into the guide groove 201 and its lower end surface can cover the positioning groove 101.

[0038] In the above two embodiments, since the positioning jig needs to be placed in a magnetic field and the magnetic declination of the test magnet product is measured, the bottom plate 1, the positioning plate 2, the pressing plate 3 and the positioning structure cannot be made of magnetically conductive materials to avoid interacting with the magnetic field and affecting the test data. Preferably, they are made of non-metallic materials, and hard plastic materials can be selected.

[0039] The specific embodiments described herein are only illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A positioning fixture for magnetic declination testing of a magnet product, characterized in that, Comprising: A bottom plate, on the upper end surface of which there is a positioning groove for placing a product. A positioning plate, which is arranged on the bottom plate. One side of the positioning plate is provided with a guide groove vertically penetrating its body, and the vertical projection of the positioning groove is located in the guide groove. A pressing plate, at one corner of which there is a relief groove vertically penetrating its body. The pressing plate abuts against the bottom plate and is inserted into the guide groove. The pressing plate at least partially covers the positioning groove, and the relief groove is at least partially communicated with the positioning groove. A positioning structure, which fixes the pressing plate to the bottom plate and / or the positioning plate.

2. The positioning fixture for magnetic declination test of the magnet product according to claim 1, characterized in that, The positioning plate is pasted on the bottom plate.

3. The positioning fixture for magnetic declination testing of the magnet product according to claim 2, wherein At least a part of the vertical projections of the opposite side walls of the positioning plate are located on the bottom plate.

4. The positioning fixture for magnetic declination test of the magnet product according to claim 1, characterized in that, An installation groove is provided on the bottom plate, and a positioning piece is provided on the positioning plate. The positioning piece is embedded in the installation groove.

5. The positioning jig for magnetic declination test of the magnet product according to any one of claims 1 to 4, characterized in that The positioning structure includes a locking column, a bottom hole provided on the bottom plate, and a waist hole provided on the pressing plate. The locking column passes through the waist hole and is locked in the bottom hole to fix the pressing plate to the bottom plate.

6. The positioning fixture for magnetic declination test of the magnet product according to any one of claims 1 to 4, characterized in that, The positioning structure includes a slot provided on the positioning plate and communicated with the guide groove. An insertion plate is provided on the pressing plate beside the relief groove. The insertion plate is press-fitted into the slot.

7. The positioning fixture for magnetic declination test of the magnet product according to claim 6, characterized in that, An arc-shaped embedding groove is provided on the side wall of the slot, and an arc-shaped embedding block is provided on the insertion plate. The arc-shaped embedding block is embedded in the arc-shaped embedding groove.

8. The positioning jig for magnetic declination test of the magnet product according to claim 6, characterized in that, The positioning structure further includes guide strips provided on the opposite side walls of the pressing plate and sliding grooves provided on the opposite side walls of the guide groove. The guide strips are slidably arranged horizontally in the sliding grooves.

9. The positioning fixture for magnetic declination test of the magnet product according to claim 8, characterized in that, The guide strips and the sliding grooves are respectively arranged in the middle of the pressing plate and the guide groove.

10. The positioning jig for magnetic declination test of the magnet product according to claim 1, characterized in that, The bottom plate, the positioning plate, the pressing plate and the positioning structure are all made of non-metallic materials.

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