A magnetic box adsorption force testing device and its manufacturing and use method

Abstract

A magnetic box adsorption force testing device comprises: a bracket portion having an upper mounting plate and a lower fixed template connected by support rods, wherein the top surface of the lower fixed template is provided with a flat adsorption surface; a drive portion comprising a drive cylinder and a drive pump, the drive cylinder being mounted on the upper mounting plate, and the drive pump being connected to the drive cylinder via a pipeline through which a drive fluid flows; a tension sensor assembly portion comprising a display, a tension sensor, a chain, and a fixture; the display being electrically connected to the tension sensor, which is connected to an output terminal; the chain being composed of non-rigidly connected links, with the upper end of the chain connected to the tension sensor and the lower end of the chain connected to the fixture; the fixture having a side opening and a symmetrical load-bearing bottom plate for clamping the magnetic box; the test device is lightweight and provides accurate test values. Furthermore, methods for making and using the test device are provided.

Description

Technical Field

[0001] The present invention relates to the technical field of detecting the magnetic adsorption force of a magnetic box, and in particular to a device for detecting the magnetic adsorption force of a magnetic box and a method for manufacturing and using the device. Background Art

[0002] A magnetic box refers to a magnetic fixing device used to fix the mold used to produce precast concrete components to the working mold platform during the production process of precast concrete components. The magnetic fixing device includes a shell, a mounting cavity is provided in the shell, and a magnet assembly is slidably provided in the mounting cavity. The shell is provided with a magnetic switch for driving the magnet assembly to move up and down, and one end of the bottom edge of the shell is provided with a limit groove to cooperate with the mold template. When the mold needs to be fixed, the peripheral portion of the limit groove is first pressed against the mold template, and then the magnetic switch is pressed down to activate the magnet assembly to contact the working mold platform, so that the bottom surface of the magnet assembly is tightly adsorbed to the working mold platform. The peripheral portion of the limit groove thus presses the mold template tightly. Multiple magnetic boxes are set at multiple locations in the mold to achieve overall fixation of the entire mold. The specific structure of the internal magnetic box can be found in the Chinese utility model patents with announcement numbers CN209257204U and CN209190963U.

[0003] Magnetic box manufacturers typically test the magnetic adhesion of their boxes in-house. The commonly used testing equipment is an electronic tensile tester, which is bulky, weighs over a ton, and is typically fixed in place, making it difficult to move. Therefore, each test requires the magnetic box to be transported to the electronic tensile tester, making on-site testing impossible. More importantly, after purchasing a batch of magnetic boxes, such as precast concrete component manufacturers, they need to conduct spot checks at the precast concrete production site. However, magnetic box manufacturers cannot bring a large and cumbersome electronic tensile tester to the site, nor can they afford to purchase one in person. Therefore, the conventional practice is to attach the magnetic box directly to the work formwork and use a workshop hoisting cart to pull an electronic hanging scale to test the magnetic adhesion.

[0004] However, the following deficiencies always exist in the entire testing process:

[0005] 1. Due to the special on-site working conditions (concrete environment), the surface of the working mold table is not flat and clean, which directly affects the true magnetic adsorption force of the magnetic box;

[0006] 2. Using a honing machine for lifting not only results in an excessively fast and uneven lifting speed, but more importantly, the honing machine, electronic hanging scale, and magnetic box are basically connected by rigid rods, which is not conducive to assembly operations. In addition, during the entire testing process, the pulling force of the honing machine cannot be guaranteed to be applied vertically to the magnetic box, resulting in inaccurate test values.

[0007] In the prior art, although the utility model patent with announcement number CN210269014U discloses a tension sensor detection device, the inspiration provided by the invention concept is mainly to solve the problem of conveniently fixing sensors of different sizes. It requires the use of multiple components such as handwheels, nuts, and screws that are indirectly or directly connected to the sensors to rotate, rather than using the sensors to detect other products. Therefore, whether the product to be tested is easy to install and fix, and whether the installation and fixation can effectively ensure that the drive mechanism can vertically apply tension to the product to be tested, etc., are not mentioned, and there is no relevant inspiration. In addition, the device is provided with a large housing, which not only contains the drive mechanism, but also is provided with a drive bracket, guide rods, etc., coupled with the brackets and fixing mechanisms outside the large housing, making the entire device not advantageous in terms of size and weight, not light enough, and not conducive to easy transportation for on-site use.

[0008] Furthermore, the public text of the invention patent application with publication number CN102914430A describes a vehicle door lock handle tension test device. Although the purpose of this device is to detect the tension of the vehicle door lock handle, during the actual testing process, the vehicle door lock handle is mainly fixed by two movable fixing plates, and the position is variable. It is also impossible to ensure that the tension of the cylinder piston rod can be applied vertically to the handle, resulting in the actual detected value being only an inaccurate approximate value.

[0009] Therefore, how to obtain a detection device that is lightweight for easy transportation, can achieve accurate detection, and is convenient for clamping the product to be tested is a technical problem that needs to be solved urgently in the industry. Summary of the Invention

[0010] In order to solve the above technical problems, the present invention proposes a magnetic box adsorption force testing device with a new structure, a method for manufacturing the testing device, and a method for using the testing device.

[0011] As a first aspect, the present invention provides a magnetic box adsorption force testing device, comprising: a bracket portion having an upper mounting plate and a lower fixed template, which are connected by a support rod, wherein the top surface of the lower fixed template is processed to form a flat adsorption surface;

[0012] The driving part includes a driving cylinder and a driving pump, wherein the driving cylinder can be detachably mounted on the upper mounting plate so that the output end faces downward toward the lower fixed template, and the driving pump is connected to the driving cylinder through a pipeline, wherein the driving fluid flows in the pipeline;

[0013] The tension sensor assembly includes a display, a tension sensor, a chain and a tooling fixture; the display is electrically connected to the tension sensor via a signal line, and the tension sensor is detachably universally connected to the output end; the chain is composed of non-rigidly connected chain links and is arranged between the tension sensor and the tooling fixture, with the upper end of the chain connected to the tension sensor and the lower end of the chain connected to the tooling fixture; the tooling fixture is provided with a side opening and a symmetrical bearing base, and the magnetic box control switch is laterally inserted into the tooling fixture through the side opening and is limited to the bearing base to achieve rapid clamping.

[0014] Preferably, the tooling fixture has a first accommodating space and a second accommodating space, both of which are connected to the side opening, the first accommodating space is used to accommodate the head of the magnetic box control switch, and the second accommodating space is used to accommodate the rod of the magnetic box control switch, and the first accommodating space is composed of the spacing space between the top plate and the two supporting bottom plates, and the second accommodating space is composed of the spacing space between the two supporting bottom plates.

[0015] Preferably, the fixture further comprises a pad, which is placed on the two bearing base plates and is provided with a lateral limiting slot having a width smaller than the distance between the two bearing base plates.

[0016] Preferably, the ends of the two supporting base plates away from the side openings are connected to form a whole plate with a lateral notch.

[0017] Preferably, the driving cylinder is selected from one of an oil cylinder and an air cylinder. Correspondingly, when an oil cylinder is selected, the driving pump is selected from a manual or automatic oil pump, and when an air cylinder is selected, the driving pump is selected from a manual or automatic air pump.

[0018] Preferably, the chain may have one or more chain links, and the chain links may be closed loops or open loops.

[0019] The magnetic box adsorption force testing device proposed in the present invention is provided with three major parts, namely the bracket part, the driving part, and the tension sensor assembly part. In addition, each part is an assembled integral structure. In this way, the three major parts can be quickly assembled to form the required testing device, and the three major parts can be removed from the testing device to facilitate transportation to the concrete manufacturer for rapid assembly and testing. In addition, the structural design of the three major parts is streamlined, especially the bracket part, which only has an upper mounting plate, a lower fixed template and a support rod connecting the two. It can be seen that the testing device of the present invention has unique advantages in terms of portability and quick assembly.

[0020] The test device of the present invention, after the tensile test device adopts a detachable universal connection to the output end of the driving cylinder, is also connected to the tooling fixture through a chain, and the chain is composed of non-rigidly connected chain links. When clamping the magnetic box, compared with the rigidly connected connecting rod, interference-free and fast clamping can be achieved. More importantly, under the action of the chain, the magnetic box can quickly achieve an automatic plumb state after clamping, so that the magnetic box finally obtains vertical tension, which can truly and effectively guarantee the accuracy of the test value.

[0021] The tooling fixture of the present invention adopts a lateral insertion and limit-carrying method to achieve the clamping of the magnetic box. During operation, the clamping is very convenient, and the magnetic box is not completely fixed. It is convenient to quickly take the tooling fixture out from the side of the magnetic box after the magnetic box naturally reaches a plumb state and contacts the lower fixed template, which facilitates the actual detection operation as a whole.

[0022] It should be noted that the pulling force of the driving part of the present invention is controllable, and the pulling force can be applied slowly, so that the magnetic box can be vertically pulled up to apply vertical pulling force, and the lower fixed template is provided with a flat adsorption surface. As a result, very accurate detection values ​​can be finally obtained, and the values ​​can be fed back and displayed on the display, which is convenient for the collation and collection of values.

[0023] As a second aspect, the present invention provides a method for manufacturing the above-mentioned test device, wherein the test device can be disassembled into a bracket portion, a drive portion, and a tension sensor assembly portion, each portion independently forming an assembled integral structure;

[0024] The upper mounting plate and the lower fixed template of the bracket part are both horizontal and arranged correspondingly up and down, and are connected by support rods to form the bracket part, wherein the lower fixed template is processed with a flat adsorption surface for the magnetic box to be adsorbed;

[0025] The driving cylinder of the driving part is invertedly mounted on the upper mounting plate to obtain an output end vertically facing the lower fixed template, and is connected to the driving pump through a pipeline to obtain driving fluid;

[0026] The tension sensor assembly is vertically located between the output end and the lower fixed template. The tension sensor is connected to the output end using a universal adapter and is connected to a display via a signal line to display the actual adsorption force of the magnetic box. After the test, the display still displays the maximum adsorption force value. The fixture is provided with a side opening and a symmetrical load-bearing base. The magnetic box control switch is laterally inserted into the fixture through the side opening and is limited to the load-bearing base to achieve rapid clamping.

[0027] A chain composed of non-rigidly connected chain links is set between the tension sensor and the tooling fixture, the upper end of the chain is connected to the tension sensor, and the lower end is connected to the tooling fixture; when clamping the magnetic box, the non-rigid connection of the chain can be conveniently and quickly installed. After clamping, the magnetic box is suspended in the air, and under the automatic plumb action of the chain, the magnetic box can obtain the vertical tension of the drive cylinder.

[0028] Compared to existing concrete construction environments, the flat adsorption surface machined into the lower fixed formwork provides ample support for the magnetic box, allowing for better detection of actual adsorption force. Furthermore, the chain's automatic plumbing effect is highly effective and rapid, enabling ideal vertical tension to be achieved, making test values ​​more accurate and reliable.

[0029] As a third aspect, the present invention provides a method for using the above-mentioned testing device, which includes a bracket part, a driving part and a tension sensor assembly part. The three parts are independent of each other and form an assembled integral structure, which can be quickly assembled into the testing device and can be quickly disassembled from the testing device.

[0030] When using, it mainly includes the following steps:

[0031] (1) Quickly assemble the three parts into the detection device;

[0032] (2) Insert the magnetic box into the fixture from the side opening and limit its loading to the load-bearing bottom plate to achieve quick clamping. Keep the magnetic box suspended in the process;

[0033] (3) After the suspended magnetic box is in a natural plumb state, start the operating drive part to keep the magnetic box in a natural plumb state and slowly contact the lower fixed template, and then pull out the fixture sideways from the magnetic box control switch;

[0034] (4) Press the magnetic box control switch to fully adsorb the magnetic box onto the lower fixed template;

[0035] (5) Clamp the magnetic box again, then start the operating drive part, and apply vertical pulling force to the magnetic box in a fast-first-slow-later mode until the magnetic box is pulled up, and finally obtain the maximum adsorption force value on the display.

[0036] Preferably, when detecting a magnetic box with low adsorption force, when the tooling fixture cannot clamp the magnetic box, the pad is inserted laterally from the side opening, so that the pad is placed on the two bearing base plates, and the pad with a small lateral limit slot width implements the loading limit of the magnetic box control switch.

[0037] Preferably, the height at which the magnetic box is suspended requires that the bottom surface of the magnetic box does not touch the lower fixed template and will not automatically adsorb to the lower fixed template; when the magnetic box control switch is pressed, the magnet assembly inside the magnetic box moves downward to contact the lower fixed template, and is tightly adsorbed to the lower fixed template under the action of the magnetic adsorption force.

[0038] Compared with the prior art, the test device of the present invention can be directly disassembled into three major parts during use, and can be conveniently transported to the concrete manufacturer for rapid assembly into the test device. Of course, it can also be transported directly without disassembling, because the overall structure is very light and does not take up space. After use, the overall basic weight of the test device is maintained at about 40KG, which is much lighter than the existing one-ton weight. During the detection process, the side-insertion method is adopted to quickly clamp the magnetic box, and it is convenient to remove the working fixture from the magnetic box. In the process of clamping the magnetic box, the suspended magnetic box does not contact the lower fixed template. By utilizing the automatic plumb effect of the chain, the suspended magnetic box can quickly achieve the automatic plumb effect, thereby obtaining vertical tension and ensuring detection accuracy. The overall operation is convenient, fast and accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A schematic structural diagram of a testing device provided in a specific embodiment of the present invention;

[0040] Figure 2 This is a structural schematic diagram of a magnetic box after being clamped by a fixture in a specific embodiment of the present invention;

[0041] Figure 3 A schematic structural diagram of a fixture in a specific embodiment of the present invention;

[0042] Figure 4 This is a structural schematic diagram of a specific embodiment of the present invention in which a fixture is further padded with a pad.

[0043] Figure 5 Schematic diagram of the structure of a testing device in another specific embodiment of the present invention.

[0044] Reference numerals

[0045] Upper mounting plate 1, lower fixed template 2, support rod 3, drive cylinder 4, drive pump 5, display 6, tension sensor 7, chain 8, fixture 9, magnetic box 10, side opening 11, bearing base plate 12, control switch 13, pad 14, lateral limit slot 15, first accommodating space 16, second accommodating space 17, top plate 18, connecting nut 19. DETAILED DESCRIPTION

[0046] The following will be combined with the accompanying drawings to clearly describe the technical solutions in the specific embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of this application, not all of them. All other embodiments obtained by ordinary technicians in this field based on the following embodiments are within the scope of protection of the present invention.

[0047] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0048] A specific embodiment of the present invention provides a magnetic box adsorption force testing device, which includes a bracket part, a driving part and a tension sensor assembly part, wherein the tension sensor assembly part is used to clamp the magnetic box 10 and detect the tension applied to the magnetic box 10 by the driving part and display the value.

[0049] like Figure 1 Figure 2 shows a magnetic box adsorption force testing device according to this embodiment. The device comprises the three major components described above: a support portion, a drive portion, and a tension sensor assembly. The support portion comprises two flat plates: an upper mounting plate 1 and a lower fixed template 2. Both plates are horizontal and positioned in a corresponding position. In this embodiment, they are substantially identical in size and rectangular in shape.

[0050] To fully demonstrate its lightness, the bracket portion is formed by connecting only four support rods 3. As a result, the entire bracket portion, that is, the load-bearing portion, has a very streamlined structure, which conforms to the characteristics of lightness and makes a significant contribution to the reduction of the overall weight of the device. It should be noted that in order to solve the problem in the prior art that the uneven working formwork under concrete working conditions affects the actual detection value of the adsorption force, the lower fixed formwork is processed by a grinder to form a flat adsorption surface for the magnetic box 10 to fully adsorb, thereby effectively solving the problem in the prior art and improving the accuracy of the detection value.

[0051] exist Figure 1 The drive unit comprises a drive cylinder 4 and a drive pump 5. The drive cylinder 4 is removably mounted upside down on the upper mounting plate so that its output end faces vertically downward toward the lower fixed template. The drive pump 5 is connected to the drive cylinder 4 via a pipeline, through which a drive fluid flows. To facilitate rapid assembly of the test device, the drive cylinder 4 is removably mounted in the middle of the upper mounting plate 1. The drive cylinder 4 and the drive pump 5 are integrally assembled via the pipeline. Therefore, during assembly, there is no need to reassemble the drive cylinder 4 and the drive pump 5. If disassembly is required, the drive cylinder 4 can be disassembled and transported because it is removably mounted on the upper mounting plate 1. Alternatively, the assembled test device can be transported or moved without disassembly.

[0052] In this embodiment, the driving cylinder 4 and the driving pump 5 both adopt manual structures. The driving cylinder adopts a manual oil cylinder, and the driving pump adopts a manual oil pump. The manual structure can well control the slow increase of pulling force, so as to obtain reliable detection values.

[0053] like Figures 1-4 As shown, in this embodiment, the tension sensor assembly includes a display 6, a tension sensor 7, a chain 8 and a fixture 9.

[0054] The display 6 is electrically connected to the tension sensor 7 via a signal line, and can store the value obtained by the tension sensor 7 and display the maximum adsorption force value. The display 6 can be placed on the upper mounting plate 1 or the lower fixed template 2, or can also be placed on the bottom surface, without any specific requirements.

[0055] The tension sensor 7 is detachably universally connected to the output end of the oil cylinder (the output piston rod of the oil cylinder). In order to realize the detachable universal connection, a universal connector (unmarked) is used for connection in this embodiment, thereby obtaining the rotation of the tension sensor 7 within an appropriate range, which facilitates the clamping operation of the magnetic box 10 and its own connection operation.

[0056] The chain 8 itself is composed of non-rigidly connected links and is arranged between the tension sensor 7 and the fixture 9. The upper end of the chain 8 is connected to the tension sensor 7, and the lower end of the chain 8 is connected to the fixture 9. The arrangement of the chain 8 is very important. When clamping and assembling the magnetic box 10, the non-rigid connection of the chain 8 allows for quick clamping and assembly. After clamping, the magnetic box 10 is suspended in the air. Under the automatic plumbing effect of the chain, the magnetic box 10 and the magnetic box 10 are placed in a plumb state, ultimately obtaining very accurate detection values.

[0057] The chain 8 of the present invention may have one or more links, and the link may be a closed loop or an open loop. It should be noted that when there is one link, the upper end of the link and the tension sensor, and the lower end and the fixture can be rotatably connected to meet the automatic plumb effect. The open loop refers to a non-closed loop, and is generally set in the center of the link. Please refer to the attached Figure 5 In the structure of the embodiment shown, a connecting nut 19 is provided on the non-closed loop chain link to connect the non-closed loop chain link to form a closed loop. Of course, when it is necessary to open the chain link to form an open loop, the connecting nut 19 can be unscrewed.

[0058] In this embodiment, see Figure 2-Figure 4The fixture 9 is provided with a side opening 11 and a symmetrical supporting base 12. The control switch 13 of the magnetic box 10 is inserted into the fixture 9 laterally through the side opening 11 and is positioned on the supporting base 12 for quick clamping. To achieve positioning, the width of the gap between the two supporting bases 12 is generally smaller than the outer diameter of the head of the control switch 13. This ensures that the protrusion of the head radially protruding from the rod of the control switch 13 is positioned on the supporting base 12.

[0059] Of course, the magnetic boxes that need to be tested are of different sizes. When it is necessary to test a magnetic box with a smaller magnetic force, the fixture 9 also has a pad 14, which is placed on the two bearing base plates 12, and a lateral limit slot 15 with a width less than the distance (interval width) between the two bearing base plates 12 is opened on the pad 14. At this time, the protruding part of the head of the control switch 13 is carried on the pad 14 on both sides of the lateral limit slot 15, and the magnetic box can be clamped at the same time. It can be seen that the fixture of the present invention can clamp magnetic boxes with different magnetic forces, which increases versatility and saves costs.

[0060] In this embodiment, in order to increase the reliability of the loading and limiting function, the ends of the two supporting base plates 12 away from the side openings 11 are connected to form a whole plate with a lateral notch.

[0061] like Figure 2-Figure 4 As shown, in this embodiment, in order to realize the clamping of the magnetic box 10, the tooling fixture 9 has a first accommodating space 16 and a second accommodating space 17, and the first accommodating space 16 and the second accommodating space 17 are both connected to the side opening 11, the first accommodating space 16 is used to accommodate the head (unmarked) of the magnetic box control switch 13, and the second accommodating space 17 is used to accommodate the rod (unmarked) of the magnetic box control switch 13, and the first accommodating space 16 is composed of the spacing space between the top plate 18 and the two bearing bottom plates 12, and the second accommodating space 17 is composed of the spacing space between the two bearing bottom plates 12.

[0062] In summary, the testing device of the present invention is lightweight, assembleable, and disassembleable, offering unique advantages in transportation and handling. More importantly, during testing, the pulling force can be easily controlled and vertical force can be applied, resulting in highly accurate and reliable test values. Furthermore, testing can be performed on-site.

[0063] During production, it is important to grind the lower fixed template to create a flat adsorption surface for the magnetic box to fully adsorb; when making fixtures, set up hollow structural parts to reduce weight, and pay attention to the comprehensive setting of the side opening, the first accommodation space, and the second accommodation space; the cylinder must be installed in an inverted state so that the output end is vertically downward; pay attention to the setting and configuration position of the chain.

[0064] When using it, the following steps are mainly used:

[0065] (1) The three major parts, namely the bracket part, the drive part and the tension sensor assembly part, are quickly assembled into the detection device. Of course, if the detection device is not disassembled, it can also be directly transported as a whole to the concrete precast component manufacturer for on-site testing;

[0066] (2) Insert the magnetic box 10 into the fixture 9 from the side opening 11 and place the control switch 13 of the magnetic box 10 on the bearing base 12 to achieve quick clamping. During this process, keep the magnetic box 10 suspended. The height of the suspension is based on the requirement that the magnetic box 10 does not touch the lower fixed template 2. The height can be slightly higher than the lower fixed template 2. Be careful not to make the height too high to avoid the magnetic box 10 from vertically descending and contacting the lower fixed template 2 in the next step.

[0067] (3) After the suspended magnetic box 10 is in a natural plumb state, start the oil pump and press the oil cylinder. The output end of the oil cylinder slowly extends vertically downward, so that the magnetic box 10 remains in a natural plumb state and slowly contacts the lower fixed template 2. Then, the fixture 9 is pulled out laterally from the control switch 13 of the magnetic box 10.

[0068] (4) Press the control switch 13 of the magnetic box 10 so that the bottom of the magnetic component in the magnetic box 10 fully contacts the lower fixed template 2, thereby the magnetic box 10 is fully adsorbed on the lower fixed template 2. It should be noted that the lower fixed template 2 is made of a material that can be adsorbed by the magnet in the magnetic component. In this embodiment, it is preferably made of mold steel.

[0069] (5) Clamp the magnetic box 10 again, then start the oil pump and apply vertical pulling force to the magnetic box 10 in a fast-then-slow mode until the magnetic box 10 is pulled up, and finally obtain the maximum adsorption force value on the display 6.

[0070] During use, the magnetic box 10 uses the chain 14 and adopts a two-time clamping method to achieve an automatic plumb state. During the clamping process, the use of a carrying limit method can achieve both quick clamping and quick release, and the subsequent second clamping will not be affected after release.

[0071] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A magnetic box adsorption force testing device, characterized in that: include: The bracket part comprises an upper mounting plate and a lower fixed template, which are connected by a support rod, wherein the top surface of the lower fixed template is processed to form a flat adsorption surface; The driving part includes a driving cylinder and a driving pump, wherein the driving cylinder can be detachably mounted on the upper mounting plate so that the output end faces downward toward the lower fixed template, and the driving pump is connected to the driving cylinder through a pipeline, wherein the driving fluid flows in the pipeline; The tension sensor assembly includes a display, a tension sensor, a chain, and a fixture. The display is electrically connected to the tension sensor via a signal line, and the tension sensor is detachably universally connected to the output end. The chain is composed of non-rigidly connected links and is disposed between the tension sensor and the fixture. The upper end of the chain is connected to the tension sensor, and the lower end of the chain is connected to the fixture. The fixture is provided with a side opening and a symmetrical bearing base. The magnetic box control switch is laterally inserted into the fixture through the side opening and can be loaded and limited to the bearing base to achieve rapid clamping. The fixture comprises a first accommodating space and a second accommodating space, both of which are connected to the side opening. The first accommodating space is used to accommodate the head of the magnetic box control switch and allows the head of the magnetic box control switch to run along it. The second accommodating space is used to accommodate the rod of the magnetic box control switch and allows the rod of the magnetic box control switch to run along it. The first accommodating space is formed by the space between the top plate and the two supporting bottom plates, and the second accommodating space is formed by the space between the two supporting bottom plates. The fixture further comprises a pad, which is placed on the two bearing base plates and is provided with a lateral limiting slot having a width smaller than the distance between the two bearing base plates.

2. The testing device according to claim 1, characterized in that The ends of the two supporting bottom plates away from the side openings are connected to form a whole plate with a side notch.

3. The testing device according to claim 1, wherein: The driving cylinder is selected from one of an oil cylinder and an air cylinder. Correspondingly, when an oil cylinder is selected, the driving pump is selected from a manual or automatic oil pump. When an air cylinder is selected, the driving pump is selected from a manual or automatic air pump. The chain has one or more chain links, and the chain links are closed loops or open loops.

4. A method for manufacturing a magnetic box adsorption force testing device according to any one of claims 1 to 3, characterized in that: The test device can be disassembled into a bracket part, a driving part and a tension sensor assembly part, and each part independently forms an assembled integral structure; The upper mounting plate and the lower fixed template of the bracket part are both horizontal and arranged correspondingly up and down, and are connected by support rods to form the bracket part, wherein the lower fixed template is processed with a flat adsorption surface for the magnetic box to be adsorbed; The driving cylinder of the driving part is invertedly mounted on the upper mounting plate to obtain an output end vertically facing the lower fixed template, and is connected to the driving pump through a pipeline to obtain driving fluid; The tension sensor assembly is vertically located between the output end and the lower fixed template. The tension sensor is connected to the output end using a universal adapter and is connected to a display via a signal line to display the actual adsorption force of the magnetic box. After the test, the display still displays the maximum adsorption force value. The fixture is provided with a side opening and a symmetrical load-bearing base. The magnetic box control switch is laterally inserted into the fixture through the side opening and is limited to the load-bearing base to achieve rapid clamping. A chain composed of non-rigidly connected chain links is set between the tension sensor and the tooling fixture, the upper end of the chain is connected to the tension sensor, and the lower end is connected to the tooling fixture; when clamping the magnetic box, the non-rigid connection of the chain can be conveniently and quickly installed. After clamping, the magnetic box is suspended in the air, and under the automatic plumb action of the chain, the magnetic box can obtain the vertical tension of the drive cylinder.

5. A method for using the magnetic box adsorption force testing device according to any one of claims 1 to 3, characterized in that: The test device comprises a bracket part, a driving part and a tension sensor assembly part. The three parts are independent of each other and form an assembled integral structure, which can be quickly assembled into the test device and can also be quickly disassembled from the test device.

6. The method of use according to claim 5, characterized in that: The following steps are involved: (1) Quickly assemble the three parts into the test device; (2) Insert the magnetic box into the fixture from the side opening and limit its loading to the load-bearing bottom plate to achieve quick clamping. Keep the magnetic box suspended in the process; (3) After the suspended magnetic box is in a natural plumb state, start the operating drive part to keep the magnetic box in a natural plumb state and slowly contact the lower fixed template, and then pull out the fixture sideways from the magnetic box control switch; (4) Press the magnetic box control switch to fully adsorb the magnetic box onto the lower fixed template; (5) Clamp the magnetic box again, then start the operating drive part, and apply vertical pulling force to the magnetic box in a fast-first-slow-later mode until the magnetic box is pulled up, and finally obtain the maximum adsorption force value on the display.

7. The method of use according to claim 6, characterized in that: When detecting a magnetic box with low adsorption force, when the space between the two supporting bases of the tooling fixture is unable to clamp the magnetic box, the pad is inserted sideways from the side opening, so that the pad is placed on the two supporting bases, and the pad with a small lateral limit groove width is used to limit the loading of the magnetic box control switch.

8. The method of use according to claim 7, characterized in that: The height at which the magnetic box is suspended requires that the bottom surface of the magnetic box does not touch the lower fixed template and does not automatically adsorb to the lower fixed template; when the magnetic box control switch is pressed, the magnet assembly inside the magnetic box moves downward to contact the lower fixed template and is tightly adsorbed to the lower fixed template under the action of magnetic adsorption force.

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