Test tool suitable for low-loss magnetic core

Abstract

The invention relates to the technical field of magnetic core testing, and discloses a testing tool suitable for a low-loss magnetic core, which comprises a driving box, an operation box arranged at the upper end of the driving box, and a tightening dismounting unit arranged at one end, far away from a driving motor, of a reciprocating rod, the tightening dismounting unit comprises a tightening part and a shearing part which are arranged on the reciprocating rod; by arranging the detachable mounting disc and the tightening part, after winding of the coil is completed, a worker can clamp and fix the tail end of the coil through the tightening part and cut off the coil through the cutting-off part, and at the moment, it is guaranteed that the tail end of the cut-off coil is in a tightened state all the time; and then, a worker can disassemble the placement rod and the whole wound magnetic core on the placement rod, the worker can transfer and weld the magnetic core, subsequent coil winding is not affected, and the efficiency and quality of normal winding treatment of the magnetic core are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic core testing, and particularly to a testing tool suitable for low-loss magnetic cores. Background Art

[0002] In the manufacturing process of electronic components such as inductors, transformers, and filters, testing the magnetic core by the inductance method is a very important step, which plays a crucial role in quality control, performance verification, and design optimization. The inductance method testing can help confirm whether the inductance value of the magnetic core at a specific frequency meets the design requirements. Different designs have different requirements for the inductance value. For example, the designs of inductors and transformers usually require specific inductance values to meet the load requirements of the working conditions. The testing can ensure that the inductance value of the magnetic core at a specific working frequency is stable and there will be no deviation caused by uneven materials or problems in the manufacturing process.

[0003] When testing the magnetic core by the inductance method, a certain number of turns of coils need to be wound around the outer surface of the magnetic core, and an alternating current is passed through the coils to calculate the magnetic permeability of the magnetic core. Currently, manual winding or an automatic winding machine is usually used to wind the coils around the magnetic core. Manual winding has a slow efficiency and cannot achieve continuous production. After the automatic winding machine finishes winding, it cannot directly cut the end of the coil. Because the coil needs to be wound around the magnetic core surface with a certain tension, if it is directly cut, after the end of the coil loses the force of the subsequent coils, the last few turns of the wound coils will become loose, resulting in deviation of the subsequent test results. If the end of the coil is first welded and fixed to the magnetic core, the staff needs to perform the welding on the winding machine, which will affect the winding of the subsequent magnetic cores by the winding machine and affect the production efficiency and quality. Summary of the Invention

[0004] In view of the problems in the prior art that manual winding cannot achieve continuous production and the existing automatic winding machine directly cuts the end of the coil after winding, resulting in some coils on the magnetic core losing tension and becoming loose, affecting the subsequent detection results and production quality, a testing tool suitable for low-loss magnetic cores is proposed.

[0005] The present application provides a testing tool suitable for low-loss magnetic cores, and its purpose is: by setting a detachable mounting plate and a tensioning component, when the coil winding is completed, the staff can clamp and fix the end of the coil through the tensioning component, and cut the coil through the cutting component. At this time, it is ensured that the end of the coil is always in a tensioned state after cutting. Subsequently, the staff can detach the placement rod and the wound magnetic core on the placement rod as a whole. The staff can transfer the magnetic core and perform welding, which will not affect the winding of the subsequent coils and ensure the efficiency and quality of the normal winding process of the magnetic core.

[0006] The technical solution of the present invention is: a test fixture suitable for low-loss magnetic cores, comprising a drive box, an operating box arranged at the upper end of the drive box, a bottom plate arranged on the side wall of the drive box, a drive motor arranged inside the drive box, a reciprocating rod arranged at the drive end of the drive motor, a threaded ring arranged on the side wall of the drive box, and a tightening and disassembly unit arranged at the end of the reciprocating rod away from the drive motor, the tightening and disassembly unit comprising a tightening component and a shearing component arranged on the reciprocating rod;

[0007] The tensioning component includes an insertion slot provided on the reciprocating rod, a mounting plate provided inside the insertion slot, a placement rod provided on a side wall of the mounting plate, an annular slot provided on a curved side wall of the mounting plate, a damping bearing provided in the annular slot, a bearing plate provided on an outer ring of the damping bearing, a bending plate provided on a curved side wall of the bearing plate, a friction telescopic rod provided on a side wall of the bending plate, and a clamping seat provided at a telescopic end of the friction telescopic rod;

[0008] A clamping assembly is provided inside the clamping seat, a support plate is provided at the upper end of the base plate, a limiting rod is installed on the side wall of the support plate, a circular hole is opened at the lower end of the supporting plate, the limiting rod slides through the circular hole, and the limiting rod is used to limit the supporting plate.

[0009] Furthermore, the clamping assembly includes a through hole formed on the side wall of the clamping seat, two mounting grooves formed inside the clamping seat, and the two mounting grooves are respectively located at the upper and lower ends of the through hole. A clamping plate is installed in each of the two mounting grooves, and a trigger rod is installed at the upper end of the clamping plate, and the trigger rod slides through the top of the clamping seat.

[0010] Furthermore, the shearing component includes a connecting block arranged on the side wall of the clamping seat, a shearing seat arranged on the connecting block, a shearing groove opened on the shearing seat, a blade arranged in the shearing groove, and a synchronization rod arranged on the upper end of the blade.

[0011] Furthermore, it also includes a guide assembly arranged on the side wall of the drive box, the guide assembly includes a connecting rod arranged on the side wall of the drive box, an adjusting rod arranged at one end of the connecting rod, a guide rod arranged on the adjusting rod, a guide block arranged on the side wall of the guide rod, and a guide head arranged on the guide block, and a connecting element is installed between the guide block and the shear seat.

[0012] Furthermore, the connecting element includes a connecting plate arranged at the lower end of the shear seat, a vertical groove arranged on the side wall of the connecting plate, a clamping plate slidably arranged in the vertical groove, a fixed plate arranged on the side wall of the guide block, and a clamping slot opened on the fixed plate. The end face of the clamping plate is L-shaped, and the lower end of the clamping plate is used to be clamped into the clamping slot.

[0013] Further, it further includes a wire paying-off assembly disposed on the bottom plate. The wire paying-off assembly includes a cylinder disposed at the upper end of the bottom plate and a wire paying-off roller disposed at the upper end of the cylinder.

[0014] Further, a reciprocating thread groove is formed at the upper end of the reciprocating rod, and the reciprocating rod is installed on the inner wall of the thread ring through the reciprocating thread groove.

[0015] Advantages of the present invention:

[0016] 1. By providing a tensioning component, after the coil winding is completed and the staff cuts the end of the coil, the tensioning component can still ensure that the end of the wound coil remains in a tensioned state, preventing the situation that the end of the coil loses tension and becomes loose when the staff directly cuts the coil, and avoiding the deviation of the test results due to different tensions of the wound coils, effectively improving the test quality and data accuracy.

[0017] 2. By providing a limiting rod and a damping bearing, after the mounting disc is installed on the reciprocating rod, the driving motor can only drive the mounting disc to rotate, but not drive the bearing plate to rotate. And by providing a friction telescopic rod and a connecting element, it is ensured that during the winding process, the clamping seat always remains in the same horizontal position, does not affect the normal wire direction during the winding process, and can be quickly disassembled for subsequent welding work.

[0018] 3. By providing a detachable mounting disc, after the coil winding is completed, the coil end is fixed by the tensioning component and cut, the staff can quickly disassemble the placing rod with the magnetic core and reinstall a new placing rod. The two are used alternately, and when the staff welds the end of the coil, it will not affect the subsequent welding of the magnetic core, effectively improving the efficiency of coil winding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a first perspective three-dimensional structural schematic diagram of the present invention;

[0020] Figure 2 is of the present invention Figure 1 planar structural schematic diagram;

[0021] Figure 3 is of the present invention Figure 2 magnified structural schematic diagram at A in;

[0022] Figure 4 is of the present invention Figure 1 side view planar structural schematic diagram;

[0023] Figure 5 is a second perspective three-dimensional structural schematic diagram of the present invention;

[0024] Figure 6 is of the present invention Figure 5Schematic diagram of the enlarged structure at position B in the [device];

[0025] Figure 7 Schematic diagram of the clamping assembly structure of the present invention;

[0026] Figure 8 Schematic diagram of the connecting element structure of the present invention;

[0027] Figure 9 Schematic diagram of a partial structure of the mounting disc of the present invention.

[0028] In the figure:

[0029] 1. Driving box; 2. Operating box; 3. Bottom plate; 4. Reciprocating rod; 5. Threaded ring; 6. Mounting disc; 7. Placing rod; 8. Bearing plate; 9. Bent plate; 10. Friction telescopic rod; 11. Clamping seat; 12. Support plate; 13. Limiting rod; 14. Clamping plate; 15. Trigger rod; 16. Connecting block; 17. Shearing seat; 18. Blade; 19. Synchronizing rod; 20. Connecting rod; 21. Adjusting rod; 22. Guide rod; 23. Guide block; 24. Guide head; 25. Connecting plate; 26. Vertical groove; 27. Clamping plate; 28. Fixed plate; 29. Card slot; 30. Cylinder; 31. Pay-off reel; 32. Reciprocating thread groove. Specific embodiments

[0030] To make the above objects, features, and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings of the specification.

[0031] Example 1, referring to Figures 1 - 7 and Figure 9 , which is the first embodiment of the present invention, provides a test tool for low-loss magnetic cores, including a driving box 1, an operating box 2 fixedly installed at the upper end of the driving box 1, a bottom plate 3 fixedly installed on the side wall of the driving box 1, a driving motor fixedly installed inside the driving box 1, a reciprocating rod 4 slidably installed at the driving end of the driving motor, a threaded ring 5 fixedly installed on the side wall of the driving box 1, and a tensioning and disassembling unit installed at the end of the reciprocating rod 4 away from the driving motor. The tensioning and disassembling unit includes a tensioning component and a shearing component installed on the reciprocating rod 4. A reciprocating thread groove 32 is opened at the upper end of the reciprocating rod 4, and the reciprocating rod 4 is installed on the inner wall of the threaded ring 5 through the reciprocating thread groove 32.

[0032] The tensioning component includes an insertion groove formed in the reciprocating rod 4, a mounting disc 6 slidably mounted inside the insertion groove, a placement rod 7 fixedly mounted on the side wall of the mounting disc 6, an annular groove formed in the curved side wall of the mounting disc 6, a damping bearing fixedly mounted in the annular groove, a bearing plate 8 fixedly mounted on the outer ring of the damping bearing, a bending plate 9 fixedly mounted on the curved side wall of the bearing plate 8, a friction telescopic rod 10 fixedly mounted on the side wall of the bending plate 9, and a clamping seat 11 fixedly mounted on the telescopic end of the friction telescopic rod 10.

[0033] A clamping component is installed inside the clamping seat 11. A support plate 12 is fixedly mounted at the upper end of the bottom plate 3. A limiting rod 13 is fixedly mounted on the side wall of the support plate 12. A circular hole is formed at the lower end of the bearing plate 8. The limiting rod 13 slidably penetrates inside the circular hole. The limiting rod 13 is used to limit the bearing plate 8.

[0034] The clamping component includes a through hole formed through the side wall of the clamping seat 11, two mounting grooves formed inside the clamping seat 11, and the two mounting grooves are respectively located at the upper and lower ends of the through hole. Clamping plates 14 are installed in both mounting grooves. A trigger rod 15 is installed at the upper end of the clamping plate 14. The trigger rod 15 slidably penetrates above the clamping seat 11.

[0035] Specifically, the function of the tensioning component is as follows: After the coil winding is completed, the staff first tightens the end of the coil through the tensioning component, and then cuts the end of the coil, ensuring that the end of the coil is always in a tight state after being cut, avoiding the loss of tension of the coil after cutting, resulting in a decrease in the tension of the last few turns of the coil, making the tension of the coil wound on the magnetic core uneven, and further leading to inaccurate subsequent test results and affecting the subsequent production quality. Therefore, the technical solution of the present invention is: By setting the mounting disc 6 and the placement rod 7, the mounting disc 6 and the placement rod 7 can be detachably mounted at one end of the reciprocating rod 4. After the coil winding is completed, the two clamping plates 14 cooperate with each other to clamp the end of the coil, and at the same time, the mounting disc 6 is detached from the reciprocating rod 4. Since the clamping seat 11 is fixedly mounted on the mounting disc 6 through the bending plate 9, when the mounting disc 6 is detached, the clamping seat 11 will be synchronously detached. During the process, the end of the coil and the magnetic core are relatively stationary, that is, the magnetic core is detached. And it is ensured that the tension at the end remains unchanged. The staff can weld the detached magnetic core, and at the same time, a new mounting disc 6 can be installed on the reciprocating rod 4 for coil winding. Therefore, this device enables the staff not to affect the subsequent coil winding of the magnetic core when welding the end of the magnetic core coil, effectively improving the production efficiency and quality, and when cutting the end of the coil, the situation of the coil loosening due to the disappearance of the tension at the end of the coil will not occur, effectively improving the coil winding quality.

[0036] The difficulties of the present invention are as follows: how to ensure that the clamping seat 11 is fixedly installed on the mounting plate 6 and can be detached together with the mounting plate 6, and also ensure that during the coil winding process, it does not move along with the reciprocating movement of the placing rod 7, but remains relatively stationary with the guiding lead head 24, and the bearing plate 8 does not rotate along with the rotation of the mounting plate 6.

[0037] During the use process, the staff places the magnetic core on the placing rod 7, installs it at one end of the reciprocating rod 4 through the mounting plate 6, and fixes one end of the coil on the wire feeding roller 31 to pass through the guiding lead head 24, the cutting slot, the through hole respectively and is fixedly connected to the outer surface of the magnetic core. Then the driving motor is started, and the driving end of the driving motor drives the mounting plate 6 to rotate synchronously through the reciprocating rod 4. During the rotation, the mounting plate 6 reciprocates horizontally, and the reciprocating distance is equal to the length of the magnetic core.

[0038] After the coil winding is completed, the staff presses the trigger rod 15, so that the trigger rod 15 drives the clamping plate 14 to move downward to clamp the end of the coil. During the disassembly process, the clamping seat 11 always remains relatively stationary with the mounting plate 6 and the magnetic core. Therefore, the end of the coil clamped by the clamping seat 11 always remains relatively stationary with the magnetic core, and thus the tension at the end of the coil always remains unchanged.

[0039] Embodiment 2, refer to Figures 5 - 8 , which is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that: it further includes a guiding component installed on the side wall of the driving box 1. The guiding component includes a connecting rod 20 fixedly installed on the side wall of the driving box 1, an adjusting rod 21 fixedly installed at one end of the connecting rod 20, a guiding rod 22 fixedly installed on the adjusting rod 21, a guiding block 23 fixedly installed on the side wall of the guiding rod 22, a guiding lead head 24 fixedly installed on the guiding block 23. A connecting element is installed between the guiding block 23 and the cutting seat 17.

[0040] The connecting element includes a connecting plate 25 fixedly installed at the lower end of the cutting seat 17, a vertical slot 26 opened on the side wall of the connecting plate 25, a clamping plate 27 slidably installed in the vertical slot 26, a fixing plate 28 fixedly installed on the side wall of the guiding block 23, a clamping slot 29 opened on the fixing plate 28. The end face of the clamping plate 27 is L-shaped, and the lower end of the clamping plate 27 is used to be clamped into the clamping slot 29. It further includes a wire feeding component installed on the bottom plate 3. The wire feeding component includes a cylinder thirty fixedly installed at the upper end of the bottom plate 3, and a wire feeding roller 31 rotatably installed at the upper end of the cylinder 30

[0041] Specifically, the guiding component is used to guide the coil to move onto the magnetic core. The guiding head 24 is on the same horizontal plane as the through hole on the clamping seat 11. The connecting element is used to connect and limit the shearing seat 17 and the guiding block 23, so that when the mounting plate 6 reciprocates horizontally for winding, the shearing seat 17 and the clamping seat 11 are fixed and always in the same position. By inserting the lower end of the clamping plate 27 into the clamping groove 29, when the mounting plate 6 is moving, the clamping seat 11 and the shearing seat 17 are always at the same horizontal height and position under the support of the friction telescopic rod 10, ensuring normal winding in the subsequent process.

[0042] The functions of the damping bearing and the friction telescopic rod 10 are as follows: to ensure that when the mounting plate 6 is removed, the bearing plate 8 and the clamping seat 11 will not move relative to each other under the external force during the removal process, that is, only when the torsional force received by the bearing plate 8 and the horizontal force received by the clamping seat 11 reach a certain value, will relative rotation or movement occur. Such a setting enables the staff to not move relative to each other due to external forces when removing the mounting plate 6, effectively improving the overall stability.

[0043] The remaining structures are the same as those in Embodiment 1.

[0044] Embodiment 3, referring to Figure 8 , is the third embodiment of the present invention. The difference between this embodiment and the second embodiment is that the shearing component includes a connecting block 16 fixedly installed on the side wall of the clamping seat 11, a shearing seat 17 fixedly installed on the connecting block 16, a shearing groove opened on the shearing seat 17, a blade 18 slidably installed in the shearing groove, and a synchronous rod 19 fixedly installed at the upper end of the blade 18.

[0045] Specifically, the shearing component is used to cut the end of the coil. It should be noted that the end of the coil needs to be clamped by the tensioning component first before the end can be cut by the shearing component, preventing the situation where the tension of the coil decreases due to the disappearance of the pulling force at the end of the coil caused by cutting first.

[0046] During use, after the coil winding is completed, the staff presses the trigger rod 15, causing the trigger rod 15 to drive the clamping plate 14 to move downward to clamp the end of the coil. After clamping, the synchronous rod 19 is pressed, causing the blade 18 to move downward to cut the end of the coil. At this time, the cutting process of the end of the coil is completed.

[0047] The remaining structures are the same as those in Embodiment 2.

[0048] Combining Embodiments 1-3, the working principle of the present invention is as follows: The staff places the magnetic core on the placement rod 7, installs it at one end of the reciprocating rod 4 through the mounting disc 6, and passes one end of the coil on the wire pay-off reel 31 through the guiding lead head 24, the cutting slot, and the through hole and fixedly connects it to the outer surface of the magnetic core. Then, the driving motor is turned on. The driving end of the driving motor drives the mounting disc 6 to rotate synchronously through the reciprocating rod 4. During the rotation, the mounting disc 6 reciprocates horizontally, and the reciprocating distance is equal to the length of the magnetic core.

[0049] After the coil winding is completed, the staff presses the trigger rod 15, so that the trigger rod 15 drives the clamping plate 14 to move downward to clamp the end of the coil. After the clamping is completed, the synchronization rod 19 is pressed, so that the blade 18 moves downward to cut the end of the coil. At this time, the cutting process of the end of the coil is completed. The staff removes the mounting disc 6 from the reciprocating rod 4. During the removal process, the clamping seat 11 always remains relatively stationary with respect to the mounting disc 6 and the magnetic core. Therefore, the end of the coil clamped by the clamping seat 11 always remains relatively stationary with respect to the magnetic core, and thus the tension at the end of the coil always remains unchanged.

[0050] After the staff removes the mounting disc 6, another mounting disc 6 can be installed at one end of the reciprocating rod 4, and the end of the coil of the removed mounting disc 6 is welded. The end of the coil is welded to the surface of the corresponding magnetic core, and the reciprocating rod 4 welds the magnetic core on another mounting disc 6 to ensure the continuity of the operation of the device.

[0051] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A test tooling applicable to low-loss magnetic cores, comprising a driving box (1), an operation box (2) arranged at the upper end of the driving box (1), a bottom plate (3) arranged on the side wall of the driving box (1), a driving motor arranged inside the driving box (1), a reciprocating rod (4) arranged at the driving end of the driving motor, and a threaded ring (5) arranged on the side wall of the driving box (1), characterized in that: It further includes a tensioning and disassembling unit arranged at the end of the reciprocating rod (4) far from the driving motor. The tensioning and disassembling unit includes a tensioning component and a shearing component arranged on the reciprocating rod (4); The tensioning component includes an insertion groove opened on the reciprocating rod (4), a mounting disc (6) arranged inside the insertion groove, a placing rod (7) arranged on the side wall of the mounting disc (6), an annular groove opened on the curved side wall of the mounting disc (6), a damping bearing arranged in the annular groove, a bearing plate (8) arranged on the outer ring of the damping bearing, a bending plate (9) arranged on the curved side wall of the bearing plate (8), a friction telescopic rod (10) arranged on the side wall of the bending plate (9), and a clamping seat (11) arranged at the telescopic end of the friction telescopic rod (10); A clamping component is arranged inside the clamping seat (11). A support plate (12) is arranged at the upper end of the bottom plate (3). A limiting rod (13) is installed on the side wall of the support plate (12). A round hole is opened at the lower end of the bearing plate (8). The limiting rod (13) slidably penetrates inside the round hole. The limiting rod (13) is used to limit the bearing plate (8).

2. The test tooling applicable to a low-loss magnetic core according to claim 1, characterized in that: The clamping component includes a through hole penetratingly opened on the side wall of the clamping seat (11), two mounting grooves opened inside the clamping seat (11), and the two mounting grooves are respectively located at the upper and lower ends of the through hole. Clamping plates (14) are installed in both of the two mounting grooves. A trigger rod (15) is installed at the upper end of the clamping plate (14). The trigger rod (15) slidably penetrates above the clamping seat (11).

3. The test tooling applicable to a low-loss magnetic core according to claim 2, characterized in that: The shearing component includes a connecting block (16) arranged on the side wall of the clamping seat (11), a shearing seat (17) arranged on the connecting block (16), a shearing groove opened on the shearing seat (17), a blade (18) arranged in the shearing groove, and a synchronous rod (19) arranged at the upper end of the blade (18).

4. A test tooling applicable to a low-loss magnetic core according to claim 3, characterized in that: It further includes a guiding component arranged on the side wall of the driving box (1). The guiding component includes a connecting rod (20) arranged on the side wall of the driving box (1), an adjusting rod (21) arranged at one end of the connecting rod (20), a guiding rod (22) arranged on the adjusting rod (21), a guiding block (23) arranged on the side wall of the guiding rod (22), a guiding head (24) arranged on the guiding block (23). A connecting element is installed between the guiding block (23) and the shearing seat (17).

5. The test tooling for a low-loss magnetic core according to claim 4, characterized in that: The connecting element includes a connecting plate (25) arranged at the lower end of the shearing seat (17), a vertical groove (26) arranged on the side wall of the connecting plate (25), a clamping plate (27) slidably arranged in the vertical groove (26), a fixing plate (28) arranged on the side wall of the guiding block (23), a clamping groove (29) opened on the fixing plate (28). The end face of the clamping plate (27) is L-shaped, and the lower end of the clamping plate (27) is used to be clamped into the clamping groove (29).

6. The test tooling applicable to a low-loss magnetic core according to claim 1, characterized in that: It further includes a wire paying-off component arranged on the bottom plate (3). The wire paying-off component includes a cylinder (30) arranged at the upper end of the bottom plate (3), and a wire paying-off roller (31) arranged at the upper end of the cylinder (30).

7. A test tooling applicable to a low-loss magnetic core according to claim 1, characterized in that: A reciprocating thread groove (32) is formed at the upper end of the reciprocating rod (4), and the reciprocating rod (4) is mounted on the inner wall of the thread ring (5) through the reciprocating thread groove (32).

Images