A magnetic force indicating device and a method for using an electromagnetic chuck

Abstract

The present invention discloses a magnetic force indicating device and a method for using an electromagnetic chuck, relating to the technical fields of magnetic force monitoring and electromagnetic chucks. The magnetic force indicating device and the method for using an electromagnetic chuck control the direction of a magnetic pointer with a plumb bob by using gravity and magnetic force, so as to monitor whether the electromagnetic chuck has magnetic force and the magnitude of the magnetic force.

Description

Technical Field

[0001] The invention relates to the technical field of magnetic force monitoring and electromagnetic chuck, and in particular to a magnetic force indicating device and a method for using the electromagnetic chuck. Background Art

[0002] When electromagnetic suction cups are used to lift long materials, due to their long length, a row of multiple parallel electromagnetic suction cups are used for lifting. Since many electromagnetic suction cups are used, if one electromagnetic suction cup has a fault, it is difficult to find out during the lifting and placement of the long materials, thus causing safety hazards at the lifting site. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] In view of the deficiencies in the prior art, the present invention provides a magnetic indication device and a method for using an electromagnetic chuck, which solves the problem that there is no convenient and intuitive way to monitor the magnetic force of the electromagnetic chuck, especially the problem that a faulty electromagnetic chuck is difficult to detect during the use of parallel electromagnetic chucks.

[0005] (II) Technical solution

[0006] To achieve the above object, the present invention is implemented by the following technical scheme: a magnetic indicating device, the indicating device comprises a dial, a pointer is rotatably connected to the dial through a rotating shaft, the pointer comprises a needle segment and a weight segment, the weight segment is made of non-magnetic material, and the needle segment is made of a material that can be attracted by magnetic force;

[0007] When the attraction of the magnetic force under the dial on the needle segment is greater than the gravity on the weight segment, the weight segment will rotate above the shaft and the needle segment will rotate below the shaft;

[0008] When the attraction of the magnetic force under the dial on the needle segment is smaller than the gravity of the weight segment, the weight segment and the needle segment will deflect;

[0009] When there is no magnetic force below the dial, the weight segment will rotate below the shaft and the needle segment will rotate above the shaft.

[0010] Preferably, a non-magnetic indicator plate is provided on the top of the dial.

[0011] Preferably, a magnetic indicator plate is provided at the bottom of the dial.

[0012] Preferably, the front surface of the needle segment is coated with at least one of fluorescent and reflective materials.

[0013] Preferably, the front side of the weight section is coated with at least one of fluorescent and reflective materials.

[0014] An electromagnetic chuck, including an electromagnetic chuck, the electromagnetic chuck includes a housing, an iron core is arranged inside the housing, an electromagnetic coil is wound around the iron core, and a magnetic force indicating device is arranged at the top of the electromagnetic chuck. Technicians should install the magnetic force indicating device above the iron core. If it is installed in other positions, the magnetic force lines generated by the electromagnetic chuck may not be perpendicular, resulting in inaccurate monitoring.

[0015] Preferably, it includes an electromagnetic chuck wiring, the electromagnetic chuck wiring is electrically connected to the electromagnetic coil, and a current indicator is arranged on the electromagnetic chuck wiring. When current passes through the electromagnetic chuck wiring, the current indicator will emit an indication signal.

[0016] Preferably, the current indicator is provided with a power-on signal lamp and a power-off signal lamp.

[0017] An installation and debugging method for a magnetic force indicating device, including an electromagnetic chuck, the indicating device is installed on the top of the electromagnetic chuck through a base, the height of the base is a, and the method includes the following steps:

[0018] S1: Start the electromagnetic chuck with the normal operating current, use a Hall sensor to measure the magnetic force at a height a above the top of the electromagnetic chuck, and observe the rotation of the pointer.

[0019] S1.1: If the pointer deflects, but the needle segment does not point vertically to the electromagnetic chuck, then reduce the height of a by 5% and repeat S1.

[0020] S1.2: If the pointer rotates and the needle segment points vertically to the electromagnetic chuck, then increase the height of a by 5% and repeat S1 until the needle segment does not point vertically to the electromagnetic chuck, and record the height b of the base at this time, and use 95% of b as the height of the base.

[0021] A usage method of an electromagnetic chuck, the indicating device is installed on the top of the electromagnetic chuck through a base, and the method includes the following steps:

[0022] Step 1: Start the electromagnetic chuck to adsorb an object, but the object is still on the lifting plane.

[0023] Step 2: When the electromagnetic chuck is stable, observe the state of the pointer on the indicating device and the state of the current indicator.

[0024] Step 3: If the current indicator indicates that current passes through the electromagnetic chuck wiring and the needle segment of the pointer points vertically to the electromagnetic chuck, it means that the electromagnetic chuck is operating normally.

[0025] Step 4: If the current indicator indicates that current passes through the electromagnetic chuck wiring and the needle segment of the pointer does not point vertically to the electromagnetic chuck, it means that the electromagnetic chuck is not operating at full power and needs to be shut down for maintenance.

[0026] Step Five: If the current indicator shows that there is current passing through the electromagnetic chuck wiring and the plumb segment of the pointer is vertically downward, it indicates a malfunction of the electromagnetic chuck, no magnetic force is generated, and the lifting work should be stopped for maintenance;

[0027] Step Six: If the current indicator shows that there is no current passing through the electromagnetic chuck wiring, but the needle segment of the pointer is vertically pointing to the electromagnetic chuck, it indicates a malfunction of the current indicator, and the current indicator needs to be repaired. The simultaneous setting of the current indicator and the indicating device is conducive to the operating personnel to promptly eliminate the malfunction point of the electromagnetic chuck and improve the maintenance efficiency.

[0028] (III) Beneficial Effects

[0029] The present invention provides a magnetic force indicating device and a method for using an electromagnetic chuck. It has the following beneficial effects:

[0030] This magnetic force indicating device and the method for using an electromagnetic chuck control the direction of the magnetic pointer with a plumb bob by using gravity and magnetic force, so as to monitor whether the electromagnetic chuck has magnetic force and the magnitude of the magnetic force. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic structural diagram of the magnetic force indicating device;

[0032] Figure 2 It is a schematic structural diagram of the magnetic force indicating device (with an indicating plate);

[0033] Figure 3 It is a schematic structural diagram of an electromagnetic chuck with a magnetic force indicating device;

[0034] Figure 4 It is a schematic structural diagram of an electromagnetic chuck with a magnetic force indicating device (with a current indicator);

[0035] Figure 5 It is a sectional view of the structure of an electromagnetic chuck with a magnetic force indicating device (with a current indicator).

[0036] In the figure: 1. Electromagnetic chuck; 11. Outer shell; 12. Iron core; 13. Electromagnetic coil; 2. Indicating device; 21. Dial; 22. Pointer; 221. Needle segment; 222. Plumb segment; 23. Magnetic presence / absence indicating plate; 24. Magnetic presence indicating plate; 25. Base; 3. Current indicator; 31. Electric light for presence of electricity; 32. Electric light for absence of electricity; 4. Electromagnetic chuck wiring. DETAILED DESCRIPTION OF THE INVENTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0038] Embodiment 1: The most basic unit for implementing the functions of the present invention

[0039] A magnetic indication device, the indication device 2 includes a dial 21, and a pointer 22 is rotatably connected to the dial 21 through a rotating shaft. The pointer 22 includes a needle segment 221 and a weight segment 222. The weight segment 222 is made of non-magnetic materials such as plastics and silica gels, and the needle segment 221 is made of materials that can be attracted by magnetic force such as ferroalloys.

[0040] When the magnetic force existing below the dial 21 has an attraction force on the needle segment 221 greater than the gravity of the weight segment 222, the weight segment 222 will rotate above the rotating shaft, and the needle segment 221 will rotate below the rotating shaft.

[0041] When the magnetic force existing below the dial 21 has an attraction force on the needle segment 221 less than the gravity of the weight segment 222, the weight segment 222 and the needle segment 221 will deflect.

[0042] When there is no magnetic force below the dial 21, the weight segment 222 will rotate below the rotating shaft, and the needle segment 221 will rotate above the rotating shaft.

[0043] It should be noted that it is best to test the magnetic force of the electromagnetic chuck 1 before installing this device on the electromagnetic chuck 1, and respectively measure the attraction of the needle segment 211 by the suction force of the electromagnetic chuck 1 under different currents. Because to determine whether the magnetic force of the electromagnetic chuck 1 is sufficient, it is necessary to ensure that the indication device 2 has sufficient sensitivity. We can adjust the sensitivity of the indication device 2 by adjusting the distance between the indication device 2 and the electromagnetic chuck 1 through the base 25. Finally, the height adjustment of the base 25 should meet the following conditions:

[0044] 1. Under the normal operating current, the attraction force of the electromagnetic chuck 1 on the needle segment 211 is slightly greater than the gravity of the weight segment 222.

[0045] 2. Under a current less than the normal operating current, the attraction force of the electromagnetic chuck 1 on the needle segment 211 is less than the gravity of the weight segment 222.

[0046] Embodiment 2: Since the environment at the lifting site is relatively dark, in order to facilitate on-site personnel to observe the indication device 2

[0047] On the basis of Embodiment 1, a non-magnetic indicator plate 23 can be provided at the top of the dial 21, a magnetic indicator plate 24 can be provided at the bottom of the dial 21, at least one of fluorescent and reflective materials can be coated on the front of the needle segment 221, and at least one of fluorescent and reflective materials can be coated on the front of the weight segment 222, etc., which can enhance the observation.

[0048] Embodiment 3: The electromagnetic chuck 1 with the indicating device 2

[0049] An electromagnetic chuck includes an electromagnetic chuck 1. The electromagnetic chuck 1 includes a housing 11. An iron core 12 is arranged inside the housing 11, and an electromagnetic coil 13 is wound around the iron core 12. The indicating device 2 in Embodiment 1 or Embodiment 2 is provided at the top of the electromagnetic chuck 1.

[0050] Embodiment 4: In order to monitor the power state of the electromagnetic chuck 1

[0051] On the basis of Embodiment 3, it includes an electromagnetic chuck wiring 4. The electromagnetic chuck wiring 4 is electrically connected to the electromagnetic coil 13. A current indicator 3 is provided on the electromagnetic chuck wiring 4. When current passes through the electromagnetic chuck wiring 4, the current indicator 3 will emit an indication signal.

[0052] Also for the convenience of observation, an electrified signal lamp 31 and a non-electrified signal lamp 32 are provided on the current indicator 3. The electrified signal lamp 31 can be a red signal lamp, and the non-electrified signal lamp can be a green signal lamp.

[0053] In summary, the magnetic force indicating device and the electromagnetic chuck use gravity and magnetic force to control the direction of the magnetic pointer with a weight, so as to monitor whether the electromagnetic chuck has magnetic force and the magnitude of the magnetic force.

[0054] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. is the description of the structure of the present invention based on the drawings shown, and is only for the convenience of describing the present invention simply, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0055] For the "first" and "second" in this technical solution, they are only the appellation distinctions for the same or similar structures, or the corresponding structures with similar functions, rather than the arrangement of the importance of these structures, nor are there sorting, or comparing sizes, or other meanings.

[0056] In addition, unless otherwise clearly defined and limited, the terms "installed" and "connected" should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two structures. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the general idea of the present invention and in connection with the specific circumstances of the context of this solution.

Claims

1. A magnetic force indicating device and a method for using an electromagnetic chuck. The indicating device (2) includes a dial (21), and a pointer (22) is rotatably connected to the dial (21) through a rotating shaft. Characterized in that: The pointer (22) includes a needle segment (221) and a weight segment (222). The weight segment (222) is made of a non-magnetic material, and the needle segment (221) is made of a material that can be attracted by magnetic force. When the magnetic force existing below the dial (21) attracts the needle segment (221) with a force greater than the gravity of the weight segment (222), the weight segment (222) will rotate above the rotating shaft, and the needle segment (221) will rotate below the rotating shaft. When the magnetic force existing below the dial (21) attracts the needle segment (221) with a force less than the gravity of the weight segment (222), the weight segment (222) and the needle segment (221) will deflect. When there is no magnetic force below the dial (21), the weight segment (222) will rotate below the rotating shaft, and the needle segment (221) will rotate above the rotating shaft. It includes an electromagnetic chuck (1). The electromagnetic chuck (1) includes a housing (11), a iron core (12) is arranged inside the housing (11), an electromagnetic coil (13) is wound around the iron core (12), an indicating device (2) is arranged on the top of the electromagnetic chuck (1), including an electromagnetic chuck wiring (4). The electromagnetic chuck wiring (4) is electrically connected to the electromagnetic coil (13). A current indicator (3) is arranged on the electromagnetic chuck wiring (4). When there is current passing through the electromagnetic chuck wiring (4), the current indicator (3) will emit an indication signal. An electric signal lamp (31) and a non-electric signal lamp (32) are arranged on the current indicator (3). The indicating device (2) is installed on the top of the electromagnetic chuck (1) through a base (25). The height of the base (25) is a. The following steps are included: Installation and debugging steps: S1: Start the electromagnetic chuck (1) with the normal operating current, use a Hall sensor to measure the magnetic force magnitude at a height a above the top of the electromagnetic chuck (1), and observe the rotation of the pointer (22). S1.1: If the pointer (22) deflects, but the needle segment (221) does not point vertically to the electromagnetic chuck (1), then reduce the height of a by 5% and repeat S1. S1.2: If the pointer (22) rotates and the needle segment (221) points vertically to the electromagnetic chuck (1), then increase the height of a by 5% and repeat S1 until the needle segment (221) does not point vertically to the electromagnetic chuck (1), and record the height b of the base (25) at this time, and use 95% of b as the height of the base (25). Usage steps: Step one: Start the electromagnetic chuck (1) to adsorb an object, but the object is still on the lifting plane. Step two: Wait until the electromagnetic chuck (1) is stable, and observe the state of the pointer (22) on the indicating device (2) and the state of the current indicator (3). Step three: If the current indicator (3) indicates that there is current passing through the electromagnetic chuck wiring (4) and the needle segment (221) of the pointer (22) points vertically to the electromagnetic chuck (1), it means that the electromagnetic chuck (1) is operating normally. Step 4: If the current indicator (3) indicates that there is current passing through the electromagnetic chuck wiring (4) and the needle section (221) of the pointer (22) is not vertically pointing to the electromagnetic chuck (1), it means that the electromagnetic chuck (1) is not operating at full power and the machine needs to be shut down for maintenance; Step 5: If the current indicator (3) indicates that there is current passing through the electromagnetic chuck wiring (4) and the plumb bob section (222) of the pointer is vertically downward, it means that the electromagnetic chuck (1) is faulty and no magnetic force is generated, and the lifting work should be stopped for maintenance; Step 6: If the current indicator (3) indicates that there is no current passing through the electromagnetic chuck wiring (4), but the needle section (221) of the pointer (22) is vertically pointing to the electromagnetic chuck (1), it means that the current indicator (3) is faulty and the current indicator (3) needs to be repaired.

2. A method for using a magnetic force indicating device and an electromagnetic chuck according to claim 1, wherein: A non-magnetic indicator board (23) is provided at the top of the dial (21).

3. A method for using a magnetic force indicating device and an electromagnetic chuck according to claim 1, wherein: A magnetic indicator board (24) is provided at the bottom of the dial (21).

4. A method for using a magnetic force indicating device and an electromagnetic chuck according to claim 1, wherein: At least one of fluorescent and reflective materials is coated on the front surface of the needle section (221).

5. A method for using a magnetic force indicating device and an electromagnetic chuck according to claim 1, wherein: At least one of fluorescent and reflective materials is coated on the front surface of the plumb bob section (222).

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