Magnetic force detection device for electromagnetic chuck

Abstract

The invention relates to the technical field of magnetic force detection, in particular to a magnetic force detection device for an electromagnetic chuck, which comprises a multi-point magnetic force detection device mounted on a rack, and the multi-point magnetic force detection device comprises a multi-point tension seat, a lifting driver, a limiting grabbing device and a movable feeding device; the multi-point tension seat is fixedly mounted on the rack, a plurality of tension detection pieces are mounted on the multi-point tension seat, and the plurality of tension detection pieces are uniformly distributed at equal intervals; the lifting driver is fixedly mounted on the rack, and the lifting driver is arranged right above the multi-point tension seat; the limiting grabbing device is fixedly installed at the output end of the lifting driver and used for fixedly grabbing the electromagnetic chuck. The movable feeding device is fixedly installed on the multi-point tension base, the movable end of the movable feeding device horizontally moves to be used for limiting the position of the movable electromagnetic chuck, the product detection quality is effectively improved, and safety accidents are reduced.

Description

Technical Field

[0001] This invention relates to the field of magnetic force detection technology, specifically to a magnetic force detection device for an electromagnetic chuck. Background Technology

[0002] Electromagnetic chucks, devices that use electromagnetic principles to attract magnetic materials, are widely used in industrial fields such as machining, steel logistics, and waste recycling. Their core performance directly affects the safety and efficiency of operations. During the manufacturing process, their comprehensive performance must be rigorously tested to ensure that product quality meets standards.

[0003] Existing electromagnetic chuck performance testing devices, such as the comprehensive electromagnetic chuck performance testing device disclosed in patent CN115327455B, mainly focus on testing the overall mechanical properties of the electromagnetic chuck. These devices typically use servo motors, tension sensors, and other structures to measure the maximum adsorption force (tensile strength) of the electromagnetic chuck when detached from a single solid metal test block, as well as its adsorption retention accuracy under specific offset conditions. These tests are of great significance for evaluating the basic performance of electromagnetic chucks under ideal working conditions.

[0004] However, traditional testing methods have significant limitations that cannot be ignored. Traditional tests cannot effectively detect the uniformity of the adsorption force distribution on the working surface of an electromagnetic chuck. In actual production scenarios, due to the combined influence of various factors, it is often difficult to achieve a uniform distribution of magnetic induction intensity on the surface of an electromagnetic chuck. On the one hand, the rationality of the internal magnetic circuit design directly affects the distribution of the magnetic field; design flaws may lead to areas with excessively strong or weak magnetic fields. On the other hand, manufacturing process deviations inevitably affect the uniformity of the magnetic field; for example, insufficient processing precision and assembly errors can cause differences in surface adsorption force. Furthermore, during long-term use, electromagnetic chucks may be damaged by impacts, wear, and high temperatures, further disrupting the uniformity of their surface magnetic field. These factors combined result in areas of strong or weak adsorption force on the surface of the electromagnetic chuck. When the electromagnetic chuck is used to adsorb bulk materials, such as iron filings or small steel parts, this uneven adsorption force will have serious consequences. In areas with weak adsorption, the adsorbed material is very likely to fall off during handling. This will not only reduce work efficiency and increase the workload of repeated adsorption, but may also lead to the safety risk of falling objects from heights, posing a serious threat to the lives of on-site personnel and equipment.

[0005] While existing testing equipment can measure the overall suction force of electromagnetic chucks to meet standards, it cannot identify or locate "magnetic blind spots" or "weak magnetic areas" on the surface. This means that a substandard product with severely uneven surface adhesion may pass the traditional overall tensile test and be mistakenly judged as a qualified product entering the market. Such misjudgment poses a significant hidden danger for subsequent use. If problems arise in actual operation, it will not only cause economic losses to the company but may also lead to safety accidents and irreparable consequences. Summary of the Invention

[0006] To address the aforementioned issues, a magnetic force detection device for electromagnetic chucks is provided. This device effectively improves product testing quality and reduces safety accidents through multi-point magnetic force detection.

[0007] To address the problems of existing technologies, this invention provides a magnetic force detection device for an electromagnetic chuck, comprising a multi-point magnetic force detection device mounted on a frame. The multi-point magnetic force detection device includes a multi-point tension base, a lifting driver, a limiting gripping device, and a moving feeding device. The multi-point tension base is fixedly mounted on the frame, and multiple tension detection elements are installed on the multi-point tension base, with the multiple tension detection elements evenly distributed at equal intervals. The lifting driver is fixedly mounted on the frame and positioned directly above the multi-point tension base. The limiting gripping device is fixedly mounted on the output end of the lifting driver and is used to fix the position of the electromagnetic chuck. The moving feeding device is mounted on the multi-point tension base, and its movable end is used to limit the position of the moving electromagnetic chuck.

[0008] Preferably, the tension detection component includes a telescopic shaft, a first spring, a pull rope, a connecting block, and a pressure sensor; the telescopic shaft is slidably installed inside the multi-point tension seat; the first spring is installed on the outside of the telescopic shaft, with the end of the first spring away from the telescopic shaft abutting against the multi-point tension seat; the pull rope is fixedly installed on the top of the telescopic shaft; the connecting block is fixedly installed on the end of the pull rope away from the telescopic shaft; and the pressure sensor is fixedly installed inside the multi-point tension seat, and the pressure sensor is used to detect the pressure of the first spring.

[0009] Preferably, a buffer contact head is also installed at the bottom of the telescopic shaft. The buffer contact head includes a connecting base, a buffer contact seat, and a second spring. The connecting base is fixedly installed at the bottom of the telescopic shaft and is provided with a sliding connecting sleeve. The buffer contact seat is provided with a limiting mounting rod, which is slidably installed inside the sliding connecting sleeve. A second spring is installed between the connecting base and the buffer contact seat.

[0010] Preferably, the multi-point tension seat includes a limiting mounting seat, a buffer plate, and a buffer base; the limiting mounting seat has multiple equally spaced first limiting mounting holes inside, which are used to install telescopic shafts; the buffer plate is slidably mounted on the limiting mounting seat, and the buffer plate has multiple second limiting mounting holes that match the first limiting mounting holes; multiple third springs are provided and distributed between the buffer plate and the limiting mounting seat; the buffer base is fixedly mounted on the bottom of the limiting mounting seat, and the buffer base has a buffer layer inside.

[0011] Preferably, the limiting gripping device includes an angle adjustment device, a clamping hook, an elastic pressing frame, a fourth spring, and a first synchronous retraction device; the angle adjustment device is fixedly installed on the telescopic end of the lifting drive; the first synchronous retraction device is installed on the movable end of the angle adjustment device; the elastic pressing frame is slidably installed at the axial position of the first synchronous retraction device; the fourth spring is installed between the elastic pressing frame and the first synchronous retraction device; the clamping hook is provided with multiple hooks and is evenly distributed on the movable end of the first synchronous retraction device, and the clamping hooks are fixedly connected to the movable end of the first synchronous retraction device.

[0012] Preferably, the angle adjustment device includes a connector, a rotating connecting frame, a first push driver, a push block, a second push driver, and a limit stop; the connector is fixedly installed at the output end of the lifting driver, and a rotating connecting seat is rotatably installed on the side of the connector; the rotating connecting frame is rotatably installed at the bottom of the connector, and the bottom of the rotating connecting frame is fixedly connected to the first synchronous retraction device; the first push driver is fixedly installed on the rotating connecting seat, and a push block is provided at the output end of the first push driver, and the push block is rotatably connected to the rotating connecting frame; the second push driver is fixedly installed on the side of the connector; and the limit stop is fixedly installed at the output end of the second push driver.

[0013] Preferably, the first synchronous retraction device includes a limiting mounting plate, a synchronous drive disk, a limiting slider, and a rotary drive device; the limiting mounting plate is fixedly mounted on the rotating connecting frame, and the limiting mounting plate is provided with multiple limiting slide rails; the synchronous drive disk is rotatably mounted on the limiting mounting plate, and the synchronous drive disk is provided with multiple drive inclined grooves; multiple limiting sliders are provided, the limiting sliders are slidably connected to the limiting slide rails, and the limiting sliders are also provided with a push shaft, which is slidably connected to the drive inclined grooves; Preferably, the mobile feeding device includes a movable screw slide, a second synchronous shrinking device, a limiting shaft, and a support block; the movable screw slide is fixed on a multi-point tension seat; the second synchronous shrinking device is fixedly connected to the moving end of the movable screw slide; multiple limiting shafts are provided, and the limiting shafts are fixedly connected to the movable end of the second synchronous shrinking device; multiple support blocks are provided and evenly distributed at the axial position of the second synchronous shrinking device, and multiple sliding balls are provided on the support blocks.

[0014] The advantages of this invention compared to the prior art are: 1. This invention, by installing multiple evenly spaced tension detection components on a multi-point tension base, allows for simultaneous measurement of the adsorption force at different locations on the surface of the electromagnetic chuck during testing. When the electromagnetic chuck adsorbs the tension detection components and rises, if some of the detection components detach from the chuck and reset during the ascent, it accurately identifies "magnetic blind zones" or "weak magnetic zones" on the surface of the electromagnetic chuck. This effectively overcomes the limitation of traditional testing devices in detecting the uniformity of adsorption force distribution on the working surface of the electromagnetic chuck. This helps to strictly control the product quality of electromagnetic chucks, preventing substandard products with severely uneven surface adsorption force from entering the market through overall tension testing. It also reduces safety risks such as reduced work efficiency, material detachment, and falling objects caused by uneven adsorption force, ensuring the safety of on-site personnel and the normal operation of equipment and facilities.

[0015] 2. In the adsorption stability testing stage of this invention, when the electromagnetic chuck can lift all the tension testing components to the designated position without any detachment, the limiting gripping device swings to simulate the environment of the electromagnetic chuck in actual use. By observing whether the adsorbed tension testing components remain stably adsorbed during the swinging process of the electromagnetic chuck, the adsorption stability of the electromagnetic chuck under actual working conditions can be comprehensively evaluated. This testing method is closer to actual application scenarios and can promptly detect adsorption instability problems that may occur in complex environments, providing a more reliable basis for judging the quality of electromagnetic chucks. This ensures that only products with good adsorption stability enter the market, reducing economic losses and safety accidents caused by insufficient adsorption stability. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of a magnetic force detection device for an electromagnetic chuck according to the present invention.

[0017] Figure 2 This is a front view of a magnetic force detection device for an electromagnetic chuck according to the present invention.

[0018] Figure 3 This is a three-dimensional schematic diagram of a multi-point tension seat and a moving feeding device in a magnetic force detection device for an electromagnetic chuck according to the present invention.

[0019] Figure 4 This is a front view of a multi-point tension seat in a magnetic force detection device for an electromagnetic chuck according to the present invention.

[0020] Figure 5 yes Figure 4 A three-dimensional planar sectional view at section AA.

[0021] Figure 6 yes Figure 5 A magnified view of a section at point B.

[0022] Figure 7yes Figure 5 A magnified view of a section at point C.

[0023] Figure 8 This is a three-dimensional schematic diagram of the limiting gripping device in a magnetic force detection device for an electromagnetic chuck according to the present invention. Figure 1 .

[0024] Figure 9 This is a three-dimensional schematic diagram of the limiting gripping device in a magnetic force detection device for an electromagnetic chuck according to the present invention. Figure 2 .

[0025] Figure 10 This is a three-dimensional schematic diagram of the moving feeding device in a magnetic force detection device for an electromagnetic chuck according to the present invention.

[0026] The numbers on the map are: 1. Frame; 2. Multi-point tension seat; 21. Tension detection component; 211. Telescopic shaft; 212. First spring; 213. Pull rope; 214. Connecting block; 215. Pressure sensor; 217. Connecting base; 2171. Sliding connecting sleeve; 218. Buffer contact seat; 2181. Limiting mounting rod; 219. Second spring; 22. Limiting mounting seat; 221. First limiting mounting hole; 23. Buffer plate; 231. Second limiting mounting hole; 24. Third spring; 25. Buffer base; 251. Buffer layer; 3. Lifting driver; 4. Limit gripping device; 41. Angle adjustment device; 411. Connecting piece; 4111. Rotation 412. Connecting seat; 413. Rotating connecting frame; 414. First push driver; 415. Push block; 416. Second push driver; 417. Limiting stop; 418. Clamping hook; 419. Elastic pressing frame; 42. Fourth spring; 43. First synchronous retraction device; 44. Limiting mounting plate; 451. Limiting slide rail; 452. Synchronous drive disk; 4521. Drive slant groove; 453. Limiting slider; 4531. Pushing shaft; 454. Rotary drive device; 55. Moving feeding device; 56. Moving screw slide; 57. Second synchronous retraction device; 58. Limiting shaft; 59. Support block; 50. Sliding ball; 60. Electromagnetic chuck. Detailed Implementation

[0027] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0028] See Figures 1 to 10As shown, a magnetic force detection device for an electromagnetic chuck includes a multi-point magnetic force detection device mounted on a frame 1. The multi-point magnetic force detection device includes a multi-point tension base 2, a lifting driver 3, a limiting gripping device 4, and a moving feeding device 5. The multi-point tension base 2 is fixedly mounted on the frame 1, and multiple tension detection elements 21 are installed on the multi-point tension base 2, which are evenly distributed at equal intervals. The lifting driver 3 is fixedly mounted on the frame 1 and is positioned directly above the multi-point tension base 2. The limiting gripping device 4 is fixedly mounted on the output end of the lifting driver 3 and is used to fix the position of the electromagnetic chuck 6. The moving feeding device 5 is mounted on the multi-point tension base 2, and its movable end is used to limit the position of the moving electromagnetic chuck 6.

[0029] When magnetic force testing of the electromagnetic chuck 6 is required, the operator places the chuck 6 to be tested onto the mobile loading device 5. The mobile loading device 5 limits the electromagnetic chuck 6 and transports it directly below the limiting gripping device 4. At this time, the lifting drive 3 is activated, driving the limiting gripping device 4 downward until it reaches the position of the electromagnetic chuck 6 and clamps and fixes it. Subsequently, the lifting drive 3 rises and resets, driving the electromagnetic chuck 6 to rise synchronously, causing the electromagnetic chuck 6 to disengage from the mobile loading device 5, and the mobile loading device 5 resets.

[0030] The lifting driver 3 descends again, causing the electromagnetic chuck 6 to contact the tension detection elements 21 of the multi-point tension seat 2. Subsequently, the electromagnetic chuck 6 activates, generating magnetic attraction to attract the tops of the multiple tension detection elements 21. Next, the lifting driver 3 rises, causing the electromagnetic chuck 6 to rise as well, synchronously raising the attracted tension detection elements 21. During the ascent, the tension detection elements 21 experience pressure due to elastic compression. When the electromagnetic chuck 6 stops at the designated position, the attraction force of each attracted tension detection element 21 on the surface of the electromagnetic chuck 6 can be effectively tested. If some tension detection elements 21 in certain areas detach from the electromagnetic chuck 6 and reset during the ascent, it indicates that the magnetic attraction force of the electromagnetic chuck 6 is insufficient.

[0031] If the electromagnetic chuck 6 can lift all the tension detection elements 21 to the designated position without detachment, the limiting gripping device 4 will begin to swing. The swinging of the limiting gripping device 4 will cause the electromagnetic chuck 6 to shake, simulating the environment of the electromagnetic chuck 6 in actual use. The shaking of the electromagnetic chuck 6 will affect the adsorption stability. If the adsorbed tension detection elements 21 can still maintain stable adsorption, it indicates that the electromagnetic chuck 6 is qualified; conversely, if the tension detection elements 21 detach, it indicates that the adsorption stability of the electromagnetic chuck 6 is insufficient, making it a substandard product.

[0032] See Figures 4 to 7As shown, the tension detection component 21 includes a telescopic shaft 211, a first spring 212, a pull rope 213, a connecting block 214, and a pressure sensor 215. The telescopic shaft 211 is slidably installed inside the multi-point tension seat 2. The first spring 212 is installed on the outside of the telescopic shaft 211, and the end of the first spring 212 away from the telescopic shaft 211 abuts against the multi-point tension seat 2. The pull rope 213 is fixedly installed on the top of the telescopic shaft 211. The connecting block 214 is fixedly installed on the end of the pull rope 213 away from the telescopic shaft 211. The pressure sensor 215 is fixedly installed inside the multi-point tension seat 2, and the pressure sensor 215 is used to detect the pressure of the first spring 212.

[0033] The telescopic shaft 211 is slidably installed inside the multi-point tension seat 2, allowing it to slide freely up and down. The first spring 212 is installed on the outside of the telescopic shaft 211, with one end connected to the telescopic shaft 211 and the other end abutting against the multi-point tension seat 2. At this time, the first spring 212 is in a naturally extended state, and the pressure sensor 215 detects that the pressure value of the first spring 212 is the initial value. The connecting block 214 is fixed to the top of the telescopic shaft 211 by the pull rope 213, remaining stationary and awaiting contact with the electromagnetic chuck 6.

[0034] When the electromagnetic chuck 6 is used for magnetic force detection, it contacts the connecting block 214 and generates a magnetic attraction force. During the ascent of the electromagnetic chuck 6, this magnetic attraction force is transmitted to the telescopic shaft 211 through the connecting block 214 and the pull rope 213, causing the telescopic shaft 211 to rise synchronously within the multi-point tension seat 2. During the ascent, the telescopic shaft 211 exerts a compressive force on the first spring 212, causing it to undergo elastic deformation, shortening its length and increasing its elastic potential energy. The pressure sensor 215 detects the pressure change of the first spring 212 caused by the compression in real time. This pressure change is directly proportional to the magnitude of the magnetic attraction force applied by the electromagnetic chuck 6 to the connecting block 214. This allows for the detection of the adsorption force at a single point on the surface of the electromagnetic chuck 6.

[0035] During the adsorption stability test, when the electromagnetic chuck 6 drives the connecting block 214, the pull rope 213, and the telescopic shaft 211 to the designated position without any detachment, the limiting gripping device 4 swings, causing the electromagnetic chuck 6 to shake. If the electromagnetic chuck 6 is adsorbed stably, the connecting block 214 will always remain adsorbed to the electromagnetic chuck 6, the telescopic shaft 211 will not fluctuate abnormally, the pressure value of the first spring 212 will remain relatively stable, and the pressure signal fluctuation detected by the pressure sensor 215 will be within the allowable range. Conversely, if the adsorption stability of the electromagnetic chuck 6 is insufficient, the connecting block 214 will detach from the electromagnetic chuck 6 during the shaking process, the telescopic shaft 211 will move downward under the elastic restoring force of the first spring 212, the pressure value of the first spring 212 will decrease rapidly, and the pressure sensor 215 will detect the abnormal change in the pressure signal, thereby determining whether the electromagnetic chuck 6 is qualified.

[0036] See Figures 5 to 6 As shown, a buffer contact head is also installed at the bottom of the telescopic shaft 211. The buffer contact head includes a connecting base 217, a buffer contact seat 218, and a second spring 219. The connecting base 217 is fixedly installed at the bottom of the telescopic shaft 211, and a sliding connecting sleeve 2171 is provided on the connecting base 217. A limiting mounting rod 2181 is provided on the buffer contact seat 218, and the limiting mounting rod 2181 is slidably installed inside the sliding connecting sleeve 2171. A second spring 219 is installed between the connecting base 217 and the buffer contact seat 218.

[0037] During the magnetic force detection process, when the connecting block 214 disengages from the electromagnetic chuck 6, the telescopic shaft 211 moves downward under the elastic restoring force of the first spring 212. During this movement, the telescopic shaft 211 drives the connecting base 217 to move downward synchronously, and the connecting base 217 further drives the buffer contact seat 218 to move downward together. When the buffer contact seat 218 reaches contact with the bottom of the multi-point tension seat 2, due to the blocking effect of the bottom of the multi-point tension seat 2, the buffer contact seat 218 cannot continue to move downward, while the connecting base 217, driven by the telescopic shaft 211, still has a downward tendency. At this time, relative movement occurs between the connecting base 217 and the buffer contact seat 218, and the second spring 219 undergoes elastic deformation due to the compression of the connecting base 217, its length shortens, and its elastic potential energy increases. The elastic deformation process of the second spring 219 effectively absorbs part of the kinetic energy of the telescopic shaft 211 when it resets, and converts the impact force of the telescopic shaft 211 into the elastic potential energy of the second spring 219, thereby playing a buffering role and avoiding the device damage that may be caused by the telescopic shaft 211 directly hitting the bottom of the multi-point tension seat 2, and ensuring the stability of the telescopic shaft 211 when it resets.

[0038] See Figures 3 to 7 As shown, the multi-point tension seat 2 includes a limiting mounting seat 22, a buffer plate 23, and a buffer base 25; the limiting mounting seat 22 has a plurality of equally spaced first limiting mounting holes 221 inside, which are used to install the telescopic shaft 211; the buffer plate 23 is slidably mounted on the limiting mounting seat 22, and the buffer plate 23 has a plurality of second limiting mounting holes 231 that match the first limiting mounting holes 221; a plurality of third springs 24 are provided and distributed between the buffer plate 23 and the limiting mounting seat 22; the buffer base 25 is fixedly mounted on the bottom of the limiting mounting seat 22, and the buffer base 25 has a buffer layer 251 inside.

[0039] The limiting mounting base 22 and the buffer plate 23 are connected by a sliding connection. Multiple second limiting mounting holes 231 on the buffer plate 23, matching the first limiting mounting hole 221, further precisely guide the movement of the telescopic shaft 211. During magnetic force detection, when the electromagnetic chuck 6 contacts the connecting block 214 and generates magnetic attraction, causing the telescopic shaft 211 to rise, the first limiting mounting hole 221 and the second limiting mounting hole 231 work together to restrict the telescopic shaft 211 to linear movement only in the vertical direction, preventing deviation or tilting and ensuring the accuracy of the tensile force detection.

[0040] During the movement of the telescopic shaft 211, the multi-point tension seat 2 is equipped with double buffer protection. On the one hand, multiple third springs 24 are evenly distributed between the buffer plate 23 and the limiting mounting seat 22. When the telescopic shaft 211 moves downward under the elastic restoring force of the first spring 212, the third springs 24 play a buffering role, absorbing part of the impact energy, reducing the collision force between the limiting mounting seat 22 and the buffer plate 23, and extending the service life of the device. On the other hand, the buffer layer 251 set inside the buffer base 25 further reduces the impact force at the bottom when it comes into contact with the buffer contact head at the bottom of the telescopic shaft 211. When the connecting block 214 disengages from the electromagnetic chuck 6 and the telescopic shaft 211 moves downward quickly, the buffer contact head comes into contact with the buffer layer 251. The buffer layer 251 disperses and absorbs the impact force through its own elastic deformation, preventing the telescopic shaft 211 from directly impacting the buffer base 25 and causing damage. At the same time, the buffer plate 23 can also effectively support the connecting block 214 during compression, reduce the impact force of the connecting block 214, and protect the connecting block 214 and related components from damage.

[0041] See Figure 1 and Figure 2 As shown, the limiting gripping device 4 includes an angle adjustment device 41, a clamping hook 42, an elastic pressing frame 43, a fourth spring 44, and a first synchronous retraction device 45; the angle adjustment device 41 is fixedly installed on the telescopic end of the lifting drive 3; the first synchronous retraction device 45 is installed on the movable end of the angle adjustment device 41; the elastic pressing frame 43 is slidably installed on the axial position of the first synchronous retraction device 45; the fourth spring 44 is installed between the elastic pressing frame 43 and the first synchronous retraction device 45; the clamping hook 42 has multiple hooks and is evenly distributed on the movable end of the first synchronous retraction device 45, and the clamping hook 42 is fixedly connected to the movable end of the first synchronous retraction device 45.

[0042] When the electromagnetic chuck 6 to be tested is placed on the mobile feeding device 5 and conveyed directly below the limiting gripping device 4, the lifting drive 3 is activated, driving the angle adjustment device 41 fixedly installed at its telescopic end to move downward. During the descent, the angle adjustment device 41 drives the first synchronous retraction device 45 installed at its movable end to move downward synchronously, thereby moving the multiple gripping hooks 42 evenly distributed at the movable end of the first synchronous retraction device 45 to the side of the electromagnetic chuck 6. At the same time, the elastic pressure frame 43, which is slidably installed at the axial position of the first synchronous retraction device 45, presses against the top of the electromagnetic chuck 6 under the reaction force generated by contacting the top of the electromagnetic chuck 6 during the downward movement. This pressing action keeps the electromagnetic chuck 6 stable during subsequent gripping. During the process of the elastic pressure frame 43 pressing against the top of the electromagnetic chuck 6, the fourth spring 44 installed between the elastic pressure frame 43 and the first synchronous retraction device 45 is compressed, producing elastic deformation, providing power for subsequent elastic reset.

[0043] After the elastic pressure frame 43 presses down on the top of the electromagnetic chuck 6, the first synchronous retraction device 45 is activated, and its movable end drives multiple clamping hooks 42 to retract synchronously. Since the clamping hooks 42 are fixedly connected to the movable end of the first synchronous retraction device 45, the multiple clamping hooks 42 converge from the sides of the electromagnetic chuck 6 towards the center during retraction, achieving a limiting clamping of the electromagnetic chuck 6. The design of the clamping hooks 42 ensures that a uniform clamping force is applied to the electromagnetic chuck 6 during clamping, preventing damage or slippage due to uneven clamping force. After clamping is complete, the lifting driver 3 drives the angle adjustment device 41 to rise. The angle adjustment device 41, through the first synchronous retraction device 45 and the clamping hooks 42, synchronously lifts the electromagnetic chuck 6, causing it to disengage from the mobile feeding device 5. At this time, the mobile feeding device 5 resets after completing its conveying task.

[0044] The lifting driver 3 descends again, causing the clamped electromagnetic chuck 6 to contact the tension detection element 21 of the multi-point tension seat 2. Subsequently, the electromagnetic chuck 6 activates, generating magnetic attraction to attract the tops of the multiple tension detection elements 21. Next, the lifting driver 3 rises, causing the electromagnetic chuck 6 to rise as well. The electromagnetic chuck 6 then synchronously raises the attracted tension detection elements 21 for a suction test. During the suction test, the angle adjustment device 41 can adjust the angle of the first synchronous retraction device 45 according to actual testing requirements. By changing the spatial orientation of the first synchronous retraction device 45, the angle adjustment device 41 causes the clamped electromagnetic chuck 6 to move synchronously, simulating different angle and orientation changes that the electromagnetic chuck 6 may encounter during actual use, thereby more comprehensively testing the magnetic performance of the electromagnetic chuck 6.

[0045] See Figure 2 , Figure 8 and Figure 9As shown, the angle adjustment device 41 includes a connector 411, a rotating connecting frame 412, a first push driver 413, a push block 4131, a second push driver 414, and a limit stop 415. The connector 411 is fixedly installed at the output end of the lifting driver 3, and a rotating connecting seat 4111 is rotatably installed on the side of the connector 411. The rotating connecting frame 412 is rotatably installed at the bottom of the connector 411, and the bottom of the rotating connecting frame 412 is fixedly connected to the first synchronous retraction device 45. The first push driver 413 is fixedly installed on the rotating connecting seat 4111, and a push block 4131 is provided at the output end of the first push driver 413. The push block 4131 is rotatably connected to the rotating connecting frame 412. The second push driver 414 is fixedly installed on the side of the connector 411. The limit stop 415 is fixedly installed at the output end of the second push driver 414.

[0046] The electromagnetic chuck 6 to be tested is placed on the moving feeding device 5, which limits the movement of the electromagnetic chuck 6 and transports it directly below the limiting gripping device 4. At this time, the lifting drive 3 is activated, driving the connector 411 fixedly installed at its output end to move downward. Since the rotating connecting frame 412 is rotatably installed at the bottom of the connector 411 and the rotating connecting seat 4111 is rotatably installed on the side of the connector 411, the rotating connecting frame 412 and the rotating connecting seat 4111 move downward synchronously during the downward movement of the connector 411. Simultaneously, the elastic pressing frame 43, which is slidably installed at the axial position of the first synchronous contraction device 45, presses against the top of the electromagnetic chuck 6 under the reaction force generated by its contact with the top of the electromagnetic chuck 6 during the downward movement, keeping the electromagnetic chuck 6 stable in subsequent operations. During this process, the fourth spring 44 installed between the elastic pressing frame 43 and the first synchronous contraction device 45 is compressed, producing elastic deformation, providing power for subsequent elastic reset.

[0047] After the elastic pressing frame 43 presses against the top of the electromagnetic chuck 6, the first synchronous retraction device 45 is activated. Its movable end drives multiple clamping hooks 42, which are evenly distributed on the movable end and fixedly connected to it, to retract synchronously. The multiple clamping hooks 42 converge from the sides of the electromagnetic chuck 6 towards the center, achieving limited clamping of the electromagnetic chuck 6 and ensuring that a uniform clamping force is applied to the electromagnetic chuck 6, preventing damage or slippage of the electromagnetic chuck 6 due to uneven clamping force. After clamping is completed, the lifting driver 3 drives the connecting piece 411 to rise. The connecting piece 411, through the rotation of the connecting frame 412 and the first synchronous retraction device 45, synchronously lifts the electromagnetic chuck 6, causing the electromagnetic chuck 6 to disengage from the moving feeding device 5. The moving feeding device 5 then resets.

[0048] The lifting driver 3 descends again, causing the clamped electromagnetic chuck 6 to contact the tension detection element 21 of the multi-point tension seat 2. At this time, the angle adjustment device 41 is in the initial state, and the second push driver 414 is fixedly installed on the side of the connector 411. The limiting block 415 at its output end is in the position to block the rotation of the rotating connecting frame 412, thus limiting the rotation of the rotating connecting frame 412 and ensuring that the electromagnetic chuck 6 maintains a stable posture during the contact between the electromagnetic chuck 6 and the tension detection element 21 and during the subsequent initial lifting process.

[0049] The electromagnetic chuck 6 activates, generating magnetic force to attract the tops of multiple tension detection elements 21. Next, the lifting driver 3 rises, causing the electromagnetic chuck 6 to rise as well. The electromagnetic chuck 6 then synchronously raises the attracted tension detection elements 21 to perform a suction test. During the ascent, the tension detection elements 21 experience elastic compression, generating pressure. When the electromagnetic chuck 6 stops at the designated position, the suction force of each attracted tension detection element 21 on the surface of the electromagnetic chuck 6 can be effectively verified. If some tension detection elements 21 detach from the electromagnetic chuck 6 and reset during the ascent, it indicates that the magnetic force of the electromagnetic chuck 6 is insufficient.

[0050] If the electromagnetic chuck 6 can drive all the tension testing elements 21 to the designated position without detachment during the suction test, it enters the adsorption stability testing stage. At this time, the second push driver 414 is activated, causing the limit block 415 to disengage from the rotating connecting frame 412, releasing the restriction on the rotation of the rotating connecting frame 412, allowing the rotating connecting frame 412 to rotate freely. Subsequently, the first push driver 413, which is fixedly installed on the rotating connecting seat 4111, is activated, and the push block 4131 at its output end pushes the rotating connecting frame 412 to rotate reciprocally. Since the bottom of the rotating connecting frame 412 is fixedly connected to the first synchronous retraction device 45, the first synchronous retraction device 45 drives the clamped electromagnetic chuck 6 to shake synchronously through the clamping hook 42, thereby simulating the environment of the electromagnetic chuck 6 in actual use. The shaking of the electromagnetic chuck 6 will affect the adsorption stability. If the adsorbed tension detection element 21 can still maintain stable adsorption, it means that the electromagnetic chuck 6 is qualified; otherwise, if the tension detection element 21 detaches, it indicates that the adsorption stability of the electromagnetic chuck 6 is insufficient and it is a defective product. After the adsorption stability test is completed, all components are reset and await the next test.

[0051] See Figure 2 , Figure 8 and Figure 9As shown, the first synchronous retraction device 45 includes a limiting mounting plate 451, a synchronous drive disk 452, a limiting slider 453, and a rotary drive device 454. The limiting mounting plate 451 is fixedly mounted on the rotating connecting frame 412, and the limiting mounting plate 451 is provided with multiple limiting slide rails 4511. The synchronous drive disk 452 is rotatably mounted on the limiting mounting plate 451, and the synchronous drive disk 452 is provided with multiple drive inclined grooves 4521. Multiple limiting sliders 453 are provided, and the limiting sliders 453 are slidably connected to the limiting slide rails 4511. The limiting sliders 453 are also provided with a push shaft 4531, and the push shaft 4531 is slidably connected to the drive inclined grooves 4521. The rotary drive device 454 is mounted on the limiting mounting plate 451 and is used to drive the synchronous drive disk 452 to rotate.

[0052] The limiting mounting plate 451 is fixedly mounted on the rotating connecting frame 412, providing a stable mounting base for the entire device. Multiple limiting slide rails 4511 on the limiting mounting plate 451 provide track constraints for the directional movement of the limiting slider 453. The synchronous drive disk 452 is rotatably mounted on the limiting mounting plate 451, and multiple drive grooves 4521 on it correspond to the push shaft 4531 on the limiting slider 453. The limiting slider 453 can move linearly on the limiting slide rails 4511 through a sliding connection, and each limiting slider 453 is fixedly connected to a clamping hook 42 for clamping the electromagnetic chuck 6. The rotary drive device 454 is mounted on the limiting mounting plate 451 and is in a ready-to-start state, used to drive the synchronous drive disk 452 to rotate.

[0053] When the electromagnetic chuck 6 needs to be clamped, the rotary drive device 454 is activated, outputting power to drive the synchronous drive disk 452 to rotate around its central axis. During the rotation of the synchronous drive disk 452, the drive sloping groove 4521 moves accordingly. Since the push shaft 4531 is slidably connected to the drive sloping groove 4521, and the limiting slider 453 is limited to linear movement by the limiting slide rail 4511, the drive sloping groove 4521 applies a pushing force to the push shaft 4531 along the direction of the limiting slide rail 4511 during rotation.

[0054] Under the pushing force of the driving inclined groove 4521, the pushing shaft 4531 drives the limiting slider 453 to move synchronously towards the center along the limiting slide rail 4511. Because the pushing shafts 4531 on multiple limiting sliders 453 are all synchronously pushed by the driving inclined groove 4521 on the synchronous driving disk 452, multiple limiting sliders 453 can move towards the center simultaneously and at equal distances. Each limiting slider 453 is fixedly connected to a clamping hook 42. As the limiting slider 453 moves, multiple clamping hooks 42 also converge synchronously from the side of the electromagnetic chuck 6 towards the center, realizing the limiting clamping of the electromagnetic chuck 6. In this process, due to the synchronous movement of each limiting slider 453, a uniform clamping force can be applied to the electromagnetic chuck 6, effectively avoiding damage or slippage of the electromagnetic chuck 6 due to uneven clamping force.

[0055] See Figure 3 and Figure 10 As shown, the mobile feeding device 5 includes a movable screw slide 51, a second synchronous shrinking device 52, a limiting shaft 53, and a support block 54; the movable screw slide 51 is fixed on the multi-point tension seat 2; the second synchronous shrinking device 52 is fixedly connected to the moving end of the movable screw slide 51; multiple limiting shafts 53 are provided, and the limiting shafts 53 are fixedly connected to the movable end of the second synchronous shrinking device 52; multiple support blocks 54 are provided and evenly distributed at the axial position of the second synchronous shrinking device 52, and multiple sliding balls 541 are provided on the support blocks 54.

[0056] When magnetic force testing of the electromagnetic chuck 6 is required, the operator places the electromagnetic chuck 6 to be tested on multiple support blocks 54 at the axis of the second synchronous retraction device 52. At this time, the bottom of the electromagnetic chuck 6 contacts the sliding ball bearings 541 on the support blocks 54. The sliding ball bearings 541 can effectively reduce the friction between the electromagnetic chuck 6 and the support blocks 54, allowing the electromagnetic chuck 6 to move relatively easily in the horizontal direction, while providing stable horizontal support for the electromagnetic chuck 6.

[0057] After the electromagnetic chuck 6 is placed, the second synchronous retraction device 52 is activated. The second synchronous retraction device 52 has the same structure as the first synchronous retraction device 45. The movable end of the second synchronous retraction device 52 drives multiple limiting shafts 53 to retract synchronously. During the retraction process, the limiting shafts 53 gradually approach the electromagnetic chuck 6 and contact its side. As the limiting shafts 53 continue to retract, they apply a horizontal thrust to the electromagnetic chuck 6, causing it to move horizontally with the assistance of the sliding ball bearings 541. This corrects the position of the electromagnetic chuck 6, ensuring it is in the accurate loading position and providing precise positioning assurance for subsequent inspection operations.

[0058] After position correction is completed, the movable lead screw slide 51 is activated. Through its internal lead screw transmission mechanism, the movable lead screw slide 51 converts rotational motion into linear motion, driving the second synchronous retraction device 52, fixed to its moving end, to move horizontally. During movement, the second synchronous retraction device 52 stably supports the electromagnetic chuck 6 via the support block 54 and sliding ball bearings 541, ensuring the electromagnetic chuck 6 moves horizontally synchronously. Finally, the movable lead screw slide 51 accurately moves the placed electromagnetic chuck 6 directly below the limiting gripping device 4. At this point, the movable loading device 5 completes its loading task and awaits the start of the subsequent testing process, effectively improving the efficiency of the entire magnetic force testing process.

[0059] Specific working principle: When magnetic force testing of the electromagnetic chuck 6 is required, the operator places the chuck 6 to be tested onto the mobile loading device 5. The mobile loading device 5 limits the electromagnetic chuck 6 and transports it directly below the limiting gripping device 4. At this time, the lifting drive 3 is activated, driving the limiting gripping device 4 downward until it reaches the position of the electromagnetic chuck 6 and clamps and fixes it. Subsequently, the lifting drive 3 rises and resets, driving the electromagnetic chuck 6 to rise synchronously, causing the electromagnetic chuck 6 to disengage from the mobile loading device 5, and the mobile loading device 5 resets.

[0060] The lifting driver 3 descends again, causing the electromagnetic chuck 6 to contact the tension detection elements 21 of the multi-point tension seat 2. Subsequently, the electromagnetic chuck 6 activates, generating magnetic attraction to attract the tops of the multiple tension detection elements 21. Next, the lifting driver 3 rises, causing the electromagnetic chuck 6 to rise as well, synchronously raising the attracted tension detection elements 21. During the ascent, the tension detection elements 21 experience pressure due to elastic compression. When the electromagnetic chuck 6 stops at the designated position, the attraction force of each attracted tension detection element 21 on the surface of the electromagnetic chuck 6 can be effectively tested. If some tension detection elements 21 in certain areas detach from the electromagnetic chuck 6 and reset during the ascent, it indicates that the magnetic attraction force of the electromagnetic chuck 6 is insufficient.

[0061] If the electromagnetic chuck 6 can lift all the tension detection elements 21 to the designated position without detachment, the limiting gripping device 4 will begin to swing. The swinging of the limiting gripping device 4 will cause the electromagnetic chuck 6 to shake, simulating the environment of the electromagnetic chuck 6 in actual use. The shaking of the electromagnetic chuck 6 will affect the adsorption stability. If the adsorbed tension detection elements 21 can still maintain stable adsorption, it indicates that the electromagnetic chuck 6 is qualified; conversely, if the tension detection elements 21 detach, it indicates that the adsorption stability of the electromagnetic chuck 6 is insufficient, making it a substandard product.

[0062] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A magnetic force detection device for an electromagnetic chuck, comprising a multi-point magnetic force detection device mounted on a frame (1), characterized in that, The multi-point magnetic force detection device includes a multi-point tension seat (2), a lifting driver (3), a limit gripping device (4), and a moving feeding device (5); The multi-point tension seat (2) is fixedly installed on the frame (1). Multiple tension detection pieces (21) are installed on the multi-point tension seat (2). The multiple tension detection pieces (21) are evenly distributed at equal intervals. The lifting drive (3) is fixedly installed on the frame (1), and the lifting drive (3) is located directly above the multi-point tension seat (2); The limiting gripping device (4) is fixedly installed at the output end of the lifting drive (3). The limiting gripping device (4) is used to fix the position of the electromagnetic chuck (6). The mobile feeding device (5) is installed on the multi-point tension seat (2), and the movable end of the mobile feeding device (5) is used to limit the position of the mobile electromagnetic chuck (6).

2. The magnetic force detection device for an electromagnetic chuck according to claim 1, characterized in that, The tension detection component (21) includes a telescopic shaft (211), a first spring (212), a pull rope (213), a connecting block (214), and a pressure sensor (215); The telescopic shaft (211) is slidably installed inside the multi-point tension seat (2); The first spring (212) is installed on the outside of the telescopic shaft (211), and the end of the first spring (212) away from the telescopic shaft (211) abuts against the multi-point tension seat (2); The pull rope (213) is fixedly installed on the top of the telescopic shaft (211); The connecting block (214) is fixedly installed at the end of the pull rope (213) away from the telescopic shaft (211); The pressure sensor (215) is fixedly installed inside the multi-point tension seat (2) and is used to detect the pressure of the first spring (212).

3. The magnetic force detection device for an electromagnetic chuck according to claim 2, characterized in that, The bottom of the telescopic shaft (211) is also equipped with a buffer abutment, which includes a connecting base (217), a buffer abutment seat (218), and a second spring (219). The connecting base (217) is fixedly installed at the bottom of the telescopic shaft (211), and the connecting base (217) is provided with a sliding connecting sleeve (2171). The buffer contact seat (218) is provided with a limiting installation rod (2181), which is slidably installed inside the sliding connecting sleeve (2171); A second spring (219) is installed between the connecting base (217) and the buffer abutment (218).

4. The magnetic force detection device for an electromagnetic chuck according to claim 2, characterized in that, The multi-point tension seat (2) includes a limiting mounting seat (22), a buffer plate (23), and a buffer base (25); The interior of the limiting mounting base (22) is provided with a plurality of equally spaced first limiting mounting holes (221), which are used to install the telescopic shaft (211). The buffer plate (23) is slidably mounted on the limiting mounting base (22), and the buffer plate (23) is provided with a plurality of second limiting mounting holes (231) that match the first limiting mounting hole (221). The third spring (24) is provided in multiple parts and distributed between the buffer plate (23) and the limiting mounting seat (22); The buffer base (25) is fixedly installed at the bottom of the limiting mounting base (22), and the buffer base (25) has a buffer layer (251) inside.

5. The magnetic force detection device for an electromagnetic chuck according to claim 1, characterized in that, The limiting gripping device (4) includes an angle adjustment device (41), a clamping hook (42), an elastic pressing frame (43), a fourth spring (44), and a first synchronous retraction device (45). Angle adjustment device (41) is fixedly installed on the telescopic end of lifting drive (3); The first synchronous contraction device (45) is installed at the movable end of the angle adjustment device (41); The elastic pressure frame (43) is slidably installed at the axial position of the first synchronous contraction device (45); The fourth spring (44) is installed between the elastic pressure frame (43) and the first synchronous contraction device (45); The clamping hook (42) is provided with multiple hooks and is evenly distributed on the movable end of the first synchronous contraction device (45). The clamping hook (42) is fixedly connected to the movable end of the first synchronous contraction device (45).

6. The magnetic force detection device for an electromagnetic chuck according to claim 5, characterized in that, The angle adjustment device (41) includes a connector (411), a rotating connecting frame (412), a first push driver (413), a push block (4131), a second push driver (414), and a limit stop (415). The connector (411) is fixedly installed at the output end of the lifting drive (3), and a rotating connecting seat (4111) is rotatably installed on the side of the connector (411). The rotating connecting frame (412) is rotatably mounted on the bottom of the connector (411), and the bottom of the rotating connecting frame (412) is fixedly connected to the first synchronous retraction device (45); The first push driver (413) is fixedly installed on the rotating connecting seat (4111). The output end of the first push driver (413) is provided with a push block (4131), and the push block (4131) is rotatably connected to the rotating connecting frame (412). The second push-actuator (414) is fixedly mounted on the side of the connector (411); The limit stop (415) is fixedly installed at the output end of the second push driver (414).

7. The magnetic force detection device for an electromagnetic chuck according to claim 5, characterized in that, The first synchronous contraction device (45) includes a limiting mounting plate (451), a synchronous drive disk (452), a limiting slider (453), and a rotation drive device (454). The limiting mounting plate (451) is fixedly mounted on the rotating connecting frame (412), and the limiting mounting plate (451) is provided with multiple limiting slide rails (4511). The synchronous drive disk (452) is rotatably mounted on the limit mounting plate (451), and the synchronous drive disk (452) is provided with multiple drive slant slots (4521). Multiple limit sliders (453) are provided. The limit sliders (453) are slidably connected to the limit slide rails (4511). The limit sliders (453) are also provided with push shafts (4531). The push shafts (4531) are slidably connected to the drive inclined grooves (4521). A rotary drive device (454) is mounted on a limit mounting plate (451) and is used to drive the synchronous drive disk (452) to rotate.

8. The magnetic force detection device for an electromagnetic chuck according to claim 1, characterized in that, The mobile feeding device (5) includes a mobile screw slide (51), a second synchronous retraction device (52), a limiting shaft (53), and a support block (54); The movable lead screw slide (51) is fixed on the multi-point tension seat (2); The second synchronous contraction device (52) is fixedly connected to the moving end of the movable screw slide (51); Multiple limiting shafts (53) are provided, and the limiting shafts (53) are fixedly connected to the movable end of the second synchronous shrinking device (52); multiple support blocks (54) are provided and evenly distributed at the axial position of the second synchronous shrinking device (52), and multiple sliding balls (541) are provided on the support blocks (54).

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