A magnetic tension detection device based on deflection structure and detection method thereof

Abstract

The present invention discloses a magnetic tension detection device based on a deflection structure, the device includes a shell, a deflection structure and a magnetic tension component arranged in the shell, and the magnetic tension detection is performed by combining the magnetic tension of the built-in deflection structure with the magnetic block to be tested in combination with the magnetic tension component. The overall structure is stable, and its special deflection structure can be quickly stabilized, so as to quickly measure the magnetic tension. Its shell adopts a low-carbon steel sleeve for magnetic shielding technology to overcome external interference and improve the detection accuracy. When using the detection device, it is first calibrated with a standard part before detection, and the numerical range of the magnetic tension of a qualified workpiece is obtained and set in the force sensor. During the detection, the magnetic block to be tested is placed on the upper surface of the shell, and the magnetic tension is determined by the deflection structure and the magnetic tension component to determine whether the magnetic tension is within the numerical range of the magnetic tension of the qualified workpiece to determine whether it is qualified.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic detection of workpieces made of special materials, and in particular to a magnetic tension detection device based on a deflection pendulum structure and a detection method thereof. Background Art

[0002] In traditional quality inspection of magnet pulling force, a dynamometer is generally used to calculate the pulling force of the magnet for screening. However, since the dynamometer uses a spring test and all manual operations are used, the test efficiency is low. The deviation of the measured value is relatively large, the recorded data has low reference value, and the accuracy will be reduced after long-term use.

[0003] The Chinese invention patent with publication number CN 103076129 A discloses an electromagnet tension test device, including a bottom plate, on which an electromagnet fixing device and an electromagnet testing device are arranged, and an iron block and a tension test sensor are arranged on the testing device. When the electromagnet needs to be tested, the electromagnet is inserted into the fixing hole to fix the electromagnet. When the electromagnet is energized, a magnetic force is generated to attract the iron block, and then the cylinder is started to pull the sensor connection block, the sensor and the iron block backward. When the iron block is separated from the electromagnet, the cylinder stops operating, and the sensor records the tension value between the electromagnet and the iron block. This determines whether the product is qualified.

[0004] This test device overcomes the defect of large measurement error of spring dynamometer, but during the measurement process, the magnetic block to be tested needs to be manually fixed, and after the test is completed, the next magnetic block to be tested needs to be removed and fixed, which is not convenient for rapid detection of batch magnetic blocks and has low test efficiency. Summary of the invention

[0005] The purpose of the present invention is to provide a magnetic tension detection device based on a deflection structure to address the defects of the dynamometer in the prior art, which has large measurement errors and is not convenient for rapid detection of batch magnetic blocks. The device includes a housing, a deflection structure and a magnetic tension component arranged in the housing. The magnetic tension detection is performed by combining the magnetic tension component with the magnetic tension of the built-in deflection structure of the workpiece to be tested. The overall structure is stable, and its special deflection structure can be quickly stabilized, so as to quickly measure the magnetic tension. The housing adopts a low-carbon steel sleeve for magnetic shielding technology to overcome external interference and improve detection accuracy.

[0006] Another object of the present invention is to provide a detection method, which first uses a standard part for calibration before detection, obtains a numerical range of magnetic pull of a qualified workpiece and sets it in a force sensor. During detection, the annular magnetic block to be tested is placed on the upper surface of the housing, and the magnetic pull is measured by the deflection structure and the magnetic pull component to determine whether the magnetic pull is within the numerical range of the magnetic pull of the qualified workpiece to determine whether it is qualified.

[0007] The technical solution adopted to achieve the purpose of the present invention is:

[0008] A magnetic tension detection device based on a deflection structure, characterized in that it comprises a housing, a deflection structure arranged in the housing, and a magnetic tension detection component, wherein:

[0009] The top of the housing is provided with a positioning assembly for positioning the magnetic block to be measured;

[0010] The deflection structure includes a magnetic ring, a deflection frame driven by the magnetic ring to deflect and move upward, and a stabilizing component for stabilizing the bottom of the deflection frame; the stabilizing component includes a base fixed to the bottom of the deflection frame, a fixing plate fixed to the bottom of the shell, a centripetal spring group for balancing and pulling the base to the periphery of the fixing plate, a support shaft fixed to the lower surface of the fixing plate, and a support shaft socket formed in the center of the base, and the end of the support shaft is in contact with the support shaft socket;

[0011] The magnetic tension detection assembly includes a force sensor fixed below the fixed plate and a probe seat fixed at the bottom of the force sensor, the probe of the force sensor is coaxially arranged with the magnetic ring and the bottom is inserted into the probe seat, wherein the support shaft is fixed below the probe seat.

[0012] In the above technical solution, the positioning assembly includes a positioning sleeve fixed in the top opening of the shell, two positioning columns fixed above the positioning sleeve and protruding from the top surface of the shell, and an upper positioning surface formed on the top surface of the shell.

[0013] In the above technical solution, the yaw frame includes a circular top support and a bottom support coaxial with the magnetic ring, a hanging basket frame is arranged between the top support and the bottom support, the magnetic ring is fixed on the annular protrusion in the middle part of the top support, the magnetic ring and the annular protrusion are located in the top opening of the outer shell, and the base is fixed on the upper surface of the bottom support.

[0014] In the above technical solution, the fixed plate is a three-pronged plate, which is fixed to the bottom of the shell by three columns. The centripetal spring group includes three springs of the same material and length. One end of each spring is fixed to the base, and the other end is fixed to the edge of the three-pronged plate. The three springs are symmetrically arranged.

[0015] In the above technical solution, the deflection structure also includes a damping assembly, which includes a groove formed by the annular protrusion and used to fill the damping oil, and a vertical rod fixed to the bottom of the positioning sleeve and extending into the groove but not contacting the bottom of the groove.

[0016] In the above technical solution, the magnetic conductive ring is made of iron-nickel alloy.

[0017] In the above technical solution, the shell includes an upper end cover, a lower end cover and a sleeve, the top opening is located in the middle of the upper end cover, there is a gap between the magnetic ring and the top opening, and the column is fixed on the lower end cover.

[0018] In the above technical solution, an annular indicator light is provided on the upper surface of the upper end cover, and the annular indicator light is communicatively connected with the force sensor.

[0019] In the above technical solution, a door is provided on the side wall of the sleeve.

[0020] In the above technical solution, the sleeve is made of magnetic shielding material.

[0021] In the above technical solution, it also includes a bracket, which includes a frame structure composed of a top plate, a bottom plate and two side plates, an intermediate partition is arranged between the top plate and the bottom plate, and an opening consistent with the shape and size of the top of the magnetic tension detection device based on the pendulum structure is opened in the middle of the top plate, the bottom of the magnetic tension detection device based on the pendulum structure is fixed on the intermediate partition, and the top is flush with the top plate.

[0022] In the above technical solution, shock absorbers are provided on the bottom supporting feet of the frame structure.

[0023] Another object of the present invention is the detection method of the magnetic tension detection device based on the yaw structure, which positions the magnetic block to be tested on the upper surface of the shell through a positioning assembly. The magnetic block to be tested applies an upward magnetic tension to the magnetic conductive ring, driving the yaw structure to move upward. The central axis socket at the lower part of the yaw structure forms an axis socket with the support shaft under the force sensor, and applies axial upward pressure to the force sensor. The force sensor measures the pressure as the magnetic tension of the magnetic block to be tested.

[0024] In the above technical scheme, a standard workpiece is first used for calibration to obtain the magnetic tension value range of a qualified workpiece and set it in the force sensor. During detection, the magnetic block to be tested is placed on the upper surface of the shell, and the magnetic tension is measured through the deflection structure and the magnetic tension component to determine whether it is within the magnetic tension value range of the qualified workpiece to determine whether it is qualified.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The magnetic tension detection device based on the deflection structure provided by the present invention places the annular magnetic block to be tested on the upper surface of the shell during detection, and the magnetic tension can be measured through the deflection structure and the magnetic tension component, which is convenient for continuous detection of the magnetic tension of batch magnetic blocks, reduces manual operation steps, is suitable for application in production lines, and improves detection efficiency.

[0027] 2. The magnetic tension detection device based on the yaw structure provided by the present invention has a magnetic ring made of an iron-nickel alloy, which has a high magnetic permeability and a negligible residual magnetism. Therefore, in the detection device, after completing the measurement of a workpiece and removing the workpiece, the lower magnetic ring will be in a state of negligible magnetism due to the extremely small residual magnetism, and will not interfere with the measurement of the next annular magnetic block, thereby avoiding the influence of residual magnetism on the magnetic eccentricity measurement during batch annular magnetic block detection and improving the detection accuracy.

[0028] 3. The magnetic tension detection device based on the deflection structure provided by the present invention has a stable structure. Its special deflection structure can simulate the real working condition of the workpiece, set the distance between the workpiece and the magnetic ring, and thus quickly measure the magnetic tension. Its shell adopts low-carbon steel sleeve for magnetic shielding technology, overcomes external interference, and improves detection accuracy.

[0029] 4. The magnetic tension detection method of the magnetic block provided by the present invention first uses a standard workpiece for calibration to obtain a numerical range of magnetic tension of a qualified workpiece. There is no need to read the specific value during measurement. It only needs to determine whether the magnetic tension is within the numerical range, and display whether the workpiece is qualified through an indicator light. The method is simple and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Shown is a schematic structural diagram of a comprehensive detection device for an annular magnetic block.

[0031] Figure 2 Shown is a partial enlarged view of the stabilizing component in the yaw structure.

[0032] Figure 3 Shown is an enlarged top view of the integrated detection device of the annular magnetic block.

[0033] Figure 4 Shown is a schematic diagram of the bracket structure.

[0034] In the figure: 1-positioning sleeve, 1-1-vertical rod, 2-screw, 3-magnetic ring, 4-upper end cover, 5-top support, 5-1-annular protrusion, 6-sleeve, 7-basket frame, 8-, 9-fixing plate, 10-earring, 11-force sensor, 12-probe seat, 13-support shaft, 14-support shaft nest, 15-base, 16-bottom support, 17-fixing nut, 18-column, 19-lower end cover, 20-positioning column, 21-ring indicator light, 22-dial seat, 23-LED lamp, 24-hexagonal screw, 25-set screw, 32-spring, 33-arc gasket, 34-damping oil, 35-magnetic block to be tested, 36-top plate, 37-bottom plate, 38-middle partition, 39-shock absorber. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0036] Example 1

[0037] A magnetic tension detection device of an annular magnetic block combined with a deflection structure comprises a housing, a deflection structure arranged in the housing, and a magnetic tension component, wherein:

[0038] A positioning assembly for positioning the magnetic block 35 to be measured is disposed on the top of the housing to ensure that the magnetic block 35 to be measured maintains a coaxial center with the deflection structure in the initial state, thereby avoiding measurement errors and improving measurement accuracy.

[0039] The deflection structure includes a magnetic ring 3, a deflection frame driven by the magnetic ring 3 to deflect and move upward at the top, and a stabilizing component for stabilizing the bottom of the deflection frame; there is a gap between the magnetic ring 3 and the top opening formed on the top of the shell, and the magnetic ring 3 is attracted by the annular magnetic block to drive the top of the deflection frame to deflect and move upward in the gap; the stabilizing component includes a base 15 fixed to the bottom of the deflection frame, a fixing plate 9 fixed on the bottom of the shell, a centripetal spring group that balances and pulls the base 15 to the periphery of the fixing plate 9, a support shaft 13 fixed to the lower surface of the fixing plate 9, and a support shaft socket 14 formed in the center of the base 15, and the end of the support shaft 13 is in contact with the support shaft socket 14;

[0040] The magnetic tension detection assembly includes a force sensor 11 fixed below the fixed plate 9 and a probe seat 12 fixed at the bottom of the force sensor 11, the probe of the force sensor 11 is coaxially arranged with the magnetic ring 3 and the bottom is inserted into the probe seat 12, wherein the support shaft 13 is fixed below the probe seat 12.

[0041] When the deflection structure is in a natural state, the force sensor 11 returns to zero. The magnetic block 35 to be measured is placed on the positioning assembly for positioning. The magnetic block 35 to be measured applies an upward magnetic pull to the magnetic ring 3, driving the deflection structure to move upward. The central shaft socket 14 at the lower part of the deflection structure forms a shaft socket with the support shaft 13 below the force sensor 11, and applies axial upward pressure to the force sensor 11. The force sensor 11 measures the pressure as the magnetic pull of the magnetic block to be measured. The force sensor 11 is connected to the processor, i.e., the industrial computer, for communication. The processor receives the signal of the force sensor 11 and displays the magnetic pull value.

[0042] In order to realize rapid continuous inspection of batch workpieces, firstly, standard workpieces are used for calibration to obtain the magnetic tension value range of qualified workpieces and set it in the force sensor 11. During inspection, the magnetic block 35 to be tested is placed on the upper surface of the shell, and the magnetic tension is measured through the deflection structure and the magnetic tension component to determine whether the magnetic tension is within the magnetic tension value range of qualified workpieces to determine whether it is qualified.

[0043] Specifically, the positioning assembly includes a positioning sleeve 1 fixed in the top opening of the shell, two positioning posts 20 fixed above the positioning sleeve 1 and protruding from the top surface of the shell, and an upper positioning surface formed on the top surface of the positioning sleeve 1 and / or the top surface of the shell. The positioning sleeve 1 is arranged in the top opening of the top of the shell, and its outer edge is fixed to the top of the shell by screws 2. When in use, the magnetic block to be measured is sleeved on the outer edges of the two positioning posts 20 for axial positioning and placed on the upper positioning surface. The two positioning posts 20 position the inner ring side wall of the annular magnetic block, and the upper positioning surface positions the bottom surface of the annular magnetic block. The two positioning posts 20 and the upper positioning surface cooperate with each other to achieve precise positioning of the annular magnetic block.

[0044] Example 2

[0045] This embodiment introduces the deflection structure in detail based on the embodiment 1.

[0046] When the deflection structure is in a natural state (a state where no magnetic block to be tested is placed), the deflection structure and the magnetic block to be tested (annular) are coaxial, and the centripetal spring group provides an upward pulling force to the deflection structure as a whole, which is balanced with the overall gravity of the deflection structure. When the deflection structure is under the magnetic force of the magnetic block to be tested, the support shaft 13 provides a point-contact lower support for the deflection structure, which can ensure that the deflection structure can use the contact point between it and the lower support as a fulcrum, and under the magnetic field of the magnetic block to be tested with magnetic eccentricity, it is like an inverted simple pendulum, showing a radial deflection along the magnetic center direction.

[0047] Specifically, the deflection frame includes a circular top support 5 and a bottom support 16 coaxial with the magnetic ring 3, and a hanging basket frame 7 is arranged between the top support 5 and the bottom support 16. The hanging basket frame 7 is three or more evenly distributed support rods, which can minimize the weight of the deflection structure and facilitate the inspection and maintenance of the magnetic tension detection component located inside. The hanging basket frame 7 and the top support 5 are fixed by a set screw 25, the magnetic ring 3 is fixed to the outside of the annular protrusion 5-1 in the middle of the top support 5, and the base 15 is fixed to the upper surface of the bottom support 16 by a fixing nut 17. The hanging basket frame 7 can be deformed so that the top of the deflection structure is offset while the bottom remains stable.

[0048] Specifically, the fixed plate 9 is a three-pronged plate, which is fixed to the bottom of the shell by three columns 18. The spring group includes three springs 32 of the same material and length. The bottoms of the three springs 32 are fixed to the base 15, and the tops are fixed to the earrings 10 of the three-pronged plate 9. The three springs are symmetrically arranged with the axis of the annular magnet as the axis.

[0049] In order to avoid the influence of the unbalanced mass of the deflection structure itself (mass error that may exist during the processing) on ​​the magnetic eccentricity measurement, the deflection structure is constrained by three evenly distributed centripetal spring groups with consistent stiffness dimensions through structural design, so as to avoid arbitrary rotation of the deflection structure, thereby avoiding the influence of the unbalanced mass of the deflection structure on the magnetic eccentricity measurement. Similarly, with the help of the centripetal spring group on the deflection structure, the impact of the deflection structure on the force sensor and the influence on the measurement are avoided. In addition, with the restraint of the centripetal spring group on the deflection structure, when the measured deflection structure is evacuated after the measurement is completed, it can also maintain balance with the overall gravity of the deflection structure to achieve the acceptance of the deflection structure, thereby ensuring reliable and efficient measurement.

[0050] At the moment of placing the magnetic block to be measured, the magnetic ring 3 drives the deflection structure to swing instantaneously. After the deflection occurs, due to the effect of inertia, the unstable deflection structure will shake. In order to ensure the rapid stabilization of the deflection structure during measurement, alleviate the fluctuation of the deflection structure during the measurement process, and make the measurement stable, the deflection structure also includes a damping component, which includes a groove for filling the damping oil 34 formed by the annular protrusion 5-1 and a vertical rod 1-1 fixed to the bottom of the positioning sleeve 1 and extending into the groove but not contacting the bottom of the groove. The vertical rod 1-1 forms damping with the damping oil 34, and the vertical rod 1-1 does not contact the bottom of the groove, reserving space for the upward movement of the deflection structure. The damping oil is composed of a special component with a flexible blocking effect, which can reduce the shaking of the deflection structure and promote its stability as soon as possible, thereby improving the measurement efficiency.

[0051] The magnetic conductive ring 3 is made of an iron-nickel alloy. Since the iron-nickel alloy is a soft magnetic material, it has a high magnetic permeability and a negligible residual magnetism. Therefore, in the detection device, after completing the measurement of a workpiece and removing the workpiece, the magnetic conductive ring 3 will be in a negligible magnetic state due to the extremely small residual magnetism, and will not interfere with the measurement of the next annular magnetic block.

[0052] Example 3

[0053] This embodiment introduces the shell and support structure in detail on the basis of Embodiment 1 and Embodiment 2.

[0054] The shell includes an upper end cover 4, a lower end cover 19 and a sleeve 6, an arc-shaped gasket 33 is arranged between the lower end cover 19 and the sleeve 6, the upper end cover 4 has an opening at the top, there is a gap between the magnetic ring 3 and the opening formed at the top of the upper end cover 4, and the column 18 is fixed on the lower end cover 19.

[0055] An annular indicator light 21 is provided on the upper surface of the upper end cover 4, and the annular indicator light 21 is communicatively connected with the force sensor 11. The annular indicator light 21 is embedded in the upper end cover 4, and its upper surface is flush with the upper surface of the upper end cover 4. A dial seat 22 is provided below, and the dial seat 22 is fixed to the upper end cover 4 by a hexagonal screw 24. Red and green LED lights 23 are evenly and alternately arranged below the annular indicator light 21. The force sensor 11 is set with a magnetic tension value range of qualified annular magnetic blocks. When the magnetic tension value measured by the magnetic block to be tested is within this value range, the green indicator light turns on and the value displayed on the industrial computer is green, indicating that the product is qualified. When the measured magnetic tension is outside this value range, the red indicator light turns on and the value displayed on the industrial computer is red, indicating that the product is unqualified.

[0056] A door 8 is provided on the side wall of the sleeve 6, and opening the door allows for convenient maintenance of internal components.

[0057] The sleeve 6 is made of magnetic shielding material, preferably low carbon steel. Due to the magnetic shielding effect of the outer sleeve made of low magnetic resistance ferromagnetic material, the magnetic lines of force of the interfering magnetic field will be diverted and shunted along the surface of the sleeve, so that the deflection structure in the detection device is in a relatively closed magnetic circuit environment, thereby avoiding the influence of the dynamic interfering magnetic field on the measurement in the production detection site.

[0058] In order to facilitate measurement, the magnetic tension detection device based on the deflection structure also includes a bracket, which includes a frame structure composed of a top plate 36, a bottom plate 37 and two side plates 40, and a middle partition plate 38 is arranged between the top plate 36 and the bottom plate 37. An opening having the same shape and size as the top of the magnetic tension detection device based on the deflection structure is opened in the middle of the top plate 36. The bottom of the magnetic tension detection device based on the deflection structure is fixed on the middle partition plate 38, and the top is flush with the top plate 36. The top plate 36 forms a detection platform for convenient and rapid detection.

[0059] As a preferred embodiment, a shock absorber 39 is provided on the bottom support foot of the frame structure to prevent measurement deviation caused by vibration.

[0060] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" and the like are used in the embodiments to illustrate the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "on" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0061] Furthermore, relational terms such as “first” and “second” and the like are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any such actual relationship or order between these components.

[0062] The above is only a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A magnetic tension detection device based on a deflection structure, characterized in that: The invention comprises a housing, a deflection device arranged in the housing, Structural and magnetic pull test assembly, wherein: A positioning component for positioning the magnetic block (35) to be measured is provided on the top of the housing; The deflection structure comprises a magnetic ring (3), a deflection frame whose top is driven by the magnetic ring (3) to deflect and move upward, and a stabilizing component for stabilizing the bottom of the deflection frame; the stabilizing component comprises a base (15) fixed at the bottom of the deflection frame, a fixing plate (9) fixed on the bottom of the housing, a centripetal spring group for balancing and pulling the base (15) to be fixed to the periphery of the fixing plate (9), a support shaft (13) fixed to the lower surface of the fixing plate (9), and a support shaft socket (14) formed at the center of the base (15), wherein the end of the support shaft (13) is in contact with the support shaft socket (14); The magnetic tension detection assembly comprises a force sensor (11) fixed below the fixing plate (9) and a probe seat (12) fixed at the bottom of the force sensor (11), the probe of the force sensor (11) is coaxially arranged with the magnetic conductive ring (3) and the bottom is inserted into the probe seat (12), wherein the support shaft (13) is fixed below the probe seat (12); The deflection frame comprises a circular top support (5) and a bottom support (16) coaxial with the magnetic conductive ring (3); a hanging basket frame (7) is arranged between the top support (5) and the bottom support (16); the magnetic conductive ring (3) is fixed on an annular protrusion (5-1) in the middle of the top support (5); the magnetic conductive ring (3) and the annular protrusion (5-1) are located in the top opening of the shell; and the base (15) is fixed on the upper surface of the bottom support (16); There is a gap between the magnetic conductive ring (3) and the top opening formed on the top of the shell.

2. The magnetic tension detection device based on the deflection structure according to claim 1, characterized in that: The positioning assembly comprises a positioning sleeve (1) fixed in a top opening of the shell, two positioning columns (20) fixed above the positioning sleeve (1) and protruding from the top surface of the shell, and an upper positioning surface formed on the top surface of the shell.

3. The magnetic tension detection device based on the deflection structure according to claim 1, characterized in that: The fixing plate (9) is a three-pronged plate, which is fixed to the bottom of the housing via three columns (18). The centripetal spring group comprises three springs (32) of the same material and length. One end of each spring (32) is fixed to the base (15), and the other end is fixed to the edge of the three-pronged plate (9). The three springs are symmetrically arranged.

4. The magnetic tension detection device based on the deflection structure as claimed in claim 2, characterized in that: The deflection structure also includes a damping component, which includes a groove formed by the annular protrusion (5-1) and used to fill the damping oil (34), and a vertical rod (1-1) fixed to the bottom of the positioning sleeve (1) and extending into the groove but not contacting the bottom of the groove.

5. The magnetic tension detection device based on the deflection structure according to claim 1, characterized in that: The magnetic conductive ring (3) is made of an iron-nickel alloy.

6. The magnetic tension detection device based on the deflection structure as claimed in claim 3, characterized in that: The housing comprises an upper end cover (4), a lower end cover (19) and a sleeve (6); the top opening is located in the middle of the upper end cover (4); a gap exists between the magnetic ring (3) and the top opening; and the column (18) is fixed on the lower end cover (19).

7. The magnetic tension detection device based on the deflection structure according to claim 6, characterized in that: An annular indicator light (21) is provided on the upper surface of the upper end cover (4), and the annular indicator light (21) is communicatively connected to the force sensor (11).

8. The magnetic tension detection device based on the deflection structure as claimed in claim 6, characterized in that: A door (8) is provided on the side wall of the sleeve (6).

9. The magnetic tension detection device based on the deflection structure according to claim 6, characterized in that: The sleeve (6) is made of magnetic shielding material.

10. The magnetic tension detection device based on the deflection structure according to claim 1, characterized in that: The device also comprises a bracket, wherein the bracket comprises a frame structure composed of a top plate (36), a bottom plate (37) and two side plates (40); an intermediate partition plate (38) is arranged between the top plate (36) and the bottom plate (37); an opening having the same shape and size as the top of the magnetic tension detection device based on the deflection structure is opened in the middle of the top plate (36); the bottom of the magnetic tension detection device based on the deflection structure is fixed on the intermediate partition plate (38), and the top is flush with the top plate (36).

11. The magnetic tension detection device based on the deflection structure according to claim 10, characterized in that: A shock absorber (39) is arranged on the bottom support foot of the frame structure.

12. The detection method of the magnetic tension detection device based on the deflection structure according to any one of claims 1 to 11, characterized in that: The magnetic block (35) to be measured is positioned and placed on the upper surface of the housing through a positioning assembly. The magnetic block (35) to be measured applies an upward magnetic pulling force to the magnetic conductive ring (3), driving the deflection structure to move upward. The central shaft socket (14) at the lower part of the deflection structure and the support shaft (13) below the force sensor (11) form a shaft socket fit, and apply axial upward pressure to the force sensor (11). The pressure measured by the force sensor (11) is the magnetic pulling force of the magnetic block (35) to be measured.

13. The detection method according to claim 12, characterized in that: First, a standard workpiece is used for calibration to obtain a magnetic pull value range of a qualified workpiece and set it in a force sensor (11). During detection, a magnetic block (35) to be tested is placed on the upper surface of the housing, and the magnetic pull is measured by a deflection structure and a magnetic pull component to determine whether the magnetic pull is within the magnetic pull value range of the qualified workpiece to determine whether it is qualified.

Images