A magnet marking machine

Abstract

This utility model discloses a magnetic marking machine, relating to the field of magnetic marking technology. It includes a frame, a marking head, a control system, and a flexible electromagnetic chuck device mounted on the frame's worktable. The flexible electromagnetic chuck device consists of four layers: an array of permeable micropores on the surface of the flexible silicone chuck layer, which utilizes the downward pressure of the marking head to trigger self-generated negative pressure adsorption; an electromagnet array embedded in the bottom of the silicone layer, employing honeycomb-shaped independent units to achieve precise local excitation; a magnetically reinforcing layer made of high-permeability permalloy, integrating discrete magnetic fields to enhance magnetic attraction; and a buffer air cavity layer connected to a negative pressure air source, suppressing vibration displacement through pre-compressed elastic support columns. This solution solves the problem of adsorption and positioning of irregularly shaped magnets, achieving adaptive zero-energy adsorption and vibration-resistant control on curved surfaces.

Description

Technical Field

[0001] This utility model relates to the field of magnet marking technology, specifically a magnet marking machine. Background Technology

[0002] Magnet marking machines are key equipment for surface marking of magnetic workpieces such as permanent magnets and motor rotors. In these applications, the stability and non-displacement fixation of the workpiece are prerequisites for ensuring marking accuracy.

[0003] In existing technologies, rigid electromagnetic chucks are commonly used as fixing devices for magnetic workpieces. However, when dealing with workpieces with complex curved surfaces or irregular shapes, this fixing method suffers from several drawbacks. The working surface of the rigid chuck is usually flat, while the surface of irregularly shaped magnets often has uneven or non-planar structures. When the two come into contact, complete surface contact cannot be achieved, inevitably creating localized or distributed micro-air gaps between the chuck and the magnet. The presence of these air gaps disrupts the closure of the magnetic circuit, resulting in weakened adsorption force, insecure workpiece fixing, and consequently, affecting marking quality, leading to blurred markings, positional misalignment, or even marking failure. Therefore, we propose a magnetic marking machine. Utility Model Content

[0004] This invention addresses the shortcomings of existing technologies by proposing a magnet marking machine.

[0005] In order to solve the above-mentioned technical problems, the present invention solves the problem that irregular workpieces cannot be fully fitted to rigid suction cups in the prior art through the following technical solution.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A magnetic marking machine includes a frame, a marking head, a control system, and a flexible electromagnetic chuck device. The flexible electromagnetic chuck device is fixed to the worktable of the frame and includes a flexible silicone chuck layer, an electromagnet array, a magnetically reinforcing layer, and a buffer air cavity layer. The surface of the flexible silicone chuck layer has an array of permeable micropores. The electromagnet array is embedded at the bottom of the flexible silicone chuck layer, and each electromagnet is independently connected to the control system. The magnetically reinforcing layer is fixed below the electromagnet array and is made of a high-permeability soft magnetic alloy. The buffer air cavity layer is fixed between the bottom of the magnetically reinforcing layer and the worktable of the frame.

[0008] Preferably, the spacing between the array of breathable micropores is 2-3 times the pore diameter.

[0009] Preferably, the electromagnet array is composed of miniature electromagnet units arranged in a honeycomb pattern.

[0010] Preferably, the magnetic reinforcement layer is made of 1J22 type permalloy and the surface is treated with insulation.

[0011] Preferably, the buffer air cavity layer is connected to a negative pressure air source, and a matrix of elastic support columns is fixed inside the layer, with a magnetically conductive reinforcement layer connected to the top of the elastic support columns.

[0012] Preferably, the elastic support column is a bellows structure filled with non-Newtonian fluid, and a pressure sensor is fixedly mounted on its top and connected to the control system.

[0013] Preferably, the negative pressure air source is connected to the buffer air chamber layer through a PID controller. Both the negative pressure air source and the PID controller are fixed on the outside of the frame. The PID controller receives the pressure sensor signal and dynamically adjusts the negative pressure value inside the buffer air chamber layer.

[0014] Preferably, the breathable micropores are blind holes with closed bottoms, and the closed bottom has a spherical dome structure.

[0015] Preferably, the top opening size of the breathable micropores is smaller than the inner bottom size, forming a conical expansion structure.

[0016] Preferably, the axis of the breathable micropores forms an acute angle with the vertical direction.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This invention utilizes a flexible silicone suction cup layer to adaptively fit complex curved workpieces. Its surface array of breathable micropores, combined with negative pressure adsorption, eliminates the air gap between the suction cup and the workpiece. The electromagnet array achieves precise local magnetic force compensation through independent control, and the magnetic enhancement layer optimizes the magnetic circuit closure. The three elements work together to ensure that irregularly shaped magnets do not shift or shake during the marking process, thus avoiding blurry markings and positional deviations at the source.

[0019] The elastic support columns distributed in a matrix within the buffer air chamber are filled with non-Newtonian fluid. They harden instantaneously upon impact with the marking head to provide rigid support, while maintaining flexible buffering under normal conditions. Combined with a PID controller that receives pressure sensor signals in real time and dynamically adjusts the negative pressure value, the adsorption force is always dynamically matched with workpiece deformation and external impact, improving the stability of the marking process and the lifespan of the equipment.

[0020] The breathable microporous blind hole dome structure, combined with the conical expansion design, increases the negative pressure area while avoiding debris blockage; the inclined arrangement of micropores guides the airflow in a directional manner, accelerating the extraction of air from the air gap; enabling the equipment to quickly and stably clamp various magnetic workpieces, improving marking clarity and production efficiency. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the outer structure of the buffer air cavity layer of this utility model;

[0024] Figure 3 This is a schematic diagram of the flexible electromagnetic chuck device of this utility model;

[0025] Figure 4 This is a schematic diagram of the internal structure of the buffer air cavity layer of this utility model;

[0026] Figure 5 This is a schematic diagram of the distribution of the breathable micropores in this utility model;

[0027] Figure 6 This is a schematic diagram of the breathable microporous structure of this utility model.

[0028] Drawing number descriptions: 1. Frame; 2. Marking head; 3. Control system; 4. Flexible electromagnetic chuck device; 5. Flexible silicone chuck layer; 6. Electromagnet array; 7. Magnetic reinforcement layer; 8. Buffer air chamber layer; 9. Breathable micropores; 10. Negative pressure air source; 11. Elastic support column; 12. Pressure sensor; 13. PID controller. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings. Example

[0030] Please see Figures 1-6 A magnet marking machine includes a frame 1, a marking head 2, a control system 3, and a flexible electromagnetic chuck device 4. The flexible electromagnetic chuck device 4 is fixed on the worktable of the frame 1. The flexible electromagnetic chuck device 4 includes a flexible silicone chuck layer 5, an electromagnet array 6, a magnetically reinforcing layer 7, and a buffer air cavity layer 8. The surface of the flexible silicone chuck layer 5 is provided with an array of breathable micropores 9. The flexible silicone chuck layer 5 directly contacts the surface of the workpiece, and its elastic deformation capability adapts to the concave and convex structure of the irregularly shaped magnet.

[0031] An electromagnet array 6 is embedded at the bottom of a flexible silicone suction cup layer 5. Each electromagnet is independently connected to a control system 3 to generate a directional magnetic field that penetrates the silicone layer to adsorb the workpiece. A magnetically enhanced layer 7 is fixed below the electromagnet array 6 and is made of a soft magnetic alloy with high magnetic permeability. It integrates the discrete magnetic field into a closed magnetic circuit to improve the overall adsorption strength.

[0032] The buffer air chamber layer 8 is fixed between the bottom of the magnetically reinforcing layer 7 and the worktable of the frame 1. Through the negative pressure pre-compression elastic support column 11, the stiffness is dynamically multiplied under high-intensity impact, thus suppressing the vibration and displacement of the workpiece.

[0033] The following describes some embodiments of this application in detail with reference to the accompanying drawings:

[0034] Please see Figures 1-6 This invention utilizes a flexible silicone suction cup layer 5 to adaptively fit complex curved workpieces. Its surface array of breathable micropores 9, combined with negative pressure adsorption, eliminates the air gap between the suction cup and the workpiece. The electromagnet array 6 achieves precise local magnetic force compensation through independent control, and the magnetic enhancement layer 7 optimizes the magnetic circuit closure. The three work together to ensure that the irregularly shaped magnet does not shift or shake during the marking process, thus avoiding blurred markings and positional deviations at the source.

[0035] The array of permeable micropores 9 has a pore spacing of 2-3 times the pore diameter, forming a honeycomb-like negative pressure adsorption array on the surface of the silicone layer. This precise spacing design ensures that the negative pressure action areas of adjacent micropores are continuously covered and do not interfere with each other: a spacing of less than 2 times the pore diameter will cause airflow short-circuiting and reduce adsorption efficiency, while a spacing of more than 3 times will form adsorption blind zones. Combined with the negative pressure source of the buffer air cavity layer 8, this layout enables the workpiece surface to obtain uniform adsorption force per unit area, eliminating the risk of local warping.

[0036] Furthermore, the ventilating micropore 9 is a blind hole with a closed bottom, forming a micro negative pressure chamber. The closed bottom of the ventilating micropore 9 has a spherical dome structure, which causes the airflow in the chamber to form a vortex effect: when the negative pressure is activated, the airflow spirals and accelerates along the dome wall, improving the air gap extraction efficiency compared to a flat bottom structure. The blind hole design also prevents processing debris from entering the electromagnet array 6, maintaining the long-term reliability of the equipment.

[0037] Meanwhile, the top opening size of the permeable micropore 9 is smaller than the inner bottom size, forming a conical expansion structure and creating the Venturi effect: the high-speed airflow at the narrow end diffuses under reduced pressure in the expansion section, increasing the negative pressure adsorption area to several times that of the physical opening. The cone inclination angle optimizes the airflow guidance, causing the air gap detached from the workpiece to flow directionally along the cone wall, shortening the air gap extraction time;

[0038] Furthermore, the axis of the permeable micropores 9 forms an acute angle with the vertical direction, creating a tangential adsorption component. When the workpiece is placed, the tilted micropores generate a horizontal adsorption vector component, counteracting the horizontal displacement tendency caused by the operation of the marking head 2. The micropore group forms a mesh-like locking force field, enhancing the workpiece's shear resistance.

[0039] In this technical solution, the electromagnet array 6 is composed of honeycomb-shaped micro electromagnet units, which can perform zoned magnetic force compensation for differences in the curvature of the workpiece surface: more units are activated in high curvature areas to enhance adsorption, while the magnetic strength is reduced in planar areas for energy-saving operation. The honeycomb hexagonal structure maximizes the unit density, so that the magnetic field distribution and the air-permeable micropore array 9 form a spatial mapping relationship, realizing the vector superposition of magnetic-air adsorption forces.

[0040] In this technical solution, the magnetic reinforcement layer 7 is made of 1J22 permalloy and its surface is treated with insulation. This concentrates the discrete magnetic field lines of the electromagnet array 6 into a high-strength closed magnetic circuit, increasing the magnetic permeability compared to ordinary silicon steel. The surface insulation treatment blocks eddy current paths, reducing magnetic energy loss and preventing electromagnetic interference with the operation of the marking head 2.

[0041] In this technical solution, the buffer air cavity layer 8 is connected to the negative pressure air source 10, and the layer is fixed with matrix-distributed elastic support columns 11. The top of the elastic support columns 11 is connected to the magnetically conductive reinforcement layer 7. The buffer air cavity layer 8 is a rigid cavity, which maintains a constant volume and avoids magnetic circuit distortion caused by flexible deformation. The matrix-distributed elastic support columns 11 can reduce high-intensity impact acceleration.

[0042] Among them, the elastic support column 11 is a bellows structure filled with non-Newtonian fluid. A pressure sensor 12 is fixed on its top and connected to the control system 3. The viscosity of the non-Newtonian fluid increases when the shear rate is large, thereby instantly increasing the equivalent stiffness. The top pressure sensor 12 provides real-time feedback of the impact load and provides a response signal for PID control.

[0043] In addition, the negative pressure air source 10 is connected to the buffer air chamber layer 8 through the PID controller 13. Both the negative pressure air source 10 and the PID controller 13 are fixed on the outside of the frame 1. The PID controller 13 receives the signal from the pressure sensor 12 and dynamically adjusts the negative pressure value inside the buffer air chamber layer 8. By dynamically adjusting the pressure of the buffer chamber, the stiffness of the elastic support column 11 is doubled during the marking impact period to suppress vibration, and the pressure is reduced during the interval period to save energy, thus achieving dual-excellence control of vibration resistance and energy consumption.

[0044] The working principle of this device is as follows:

[0045] When the marking head 2 presses down on the workpiece, a wedge-shaped air gap is formed between the workpiece and the silicone layer. The influx of air generates a high-speed jet. The jet expands and decelerates through the conical micro-hole, converting kinetic energy into negative pressure, thereby adsorbing the workpiece through the silicone physical conduction. When the adsorption force in the concave area of ​​the curved surface is insufficient, the control system 3 activates the corresponding micro electromagnet to generate directional magnetic attraction force, which works in conjunction with pneumatic adsorption to ensure full surface adhesion.

[0046] During the marking impact, the negative pressure of the buffer chamber is adjusted to pre-compress the elastic support column 11 filled with non-Newtonian fluid, thereby increasing the impact shear rate of the elastic support column 11 and increasing the viscosity of the non-Newtonian fluid, thus increasing the equivalent stiffness of the elastic support column 11 and suppressing vibration displacement; the pressure sensor 12 can monitor the impact force and transmit the signal to the PID controller 13 for dynamic adjustment of the negative pressure.

[0047] Throughout the marking process, the discrete electromagnet magnetic fields of the electromagnet array 6 are gathered by the 1J22 permalloy magnetic permeable layer to form a low magnetic resistance closed loop, which stabilizes the magnetic adsorption effect on the magnetic workpiece.

[0048] When the marking head 2 rises, the workpiece is relieved of its gravity, the negative pressure in the micro-hole dissipates, the electromagnetic array is de-energized, and the elastic support column 11 is reset by the negative pressure air source 10, ready for the next loading.

[0049] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the principles, the implementation of the present invention may have any modifications or variations.

Claims

1. A magnet marking machine comprising a frame (1), a marking head (2), a control system (3), characterized in that, Also includes: The flexible electromagnetic chuck device (4) is fixed on the worktable of the frame (1). The flexible electromagnetic chuck device (4) includes a flexible silicone chuck layer (5), an electromagnet array (6), a magnetic reinforcement layer (7), and a buffer air cavity layer (8). The flexible silicone suction cup layer (5) has an array of breathable micropores (9) on its surface; the electromagnet array (6) is embedded in the bottom of the flexible silicone suction cup layer (5), and each electromagnet is independently connected to the control system (3); the magnetic reinforcement layer (7) is fixedly disposed below the electromagnet array (6) and is made of a high magnetic permeability soft magnetic alloy; the buffer air cavity layer (8) is fixedly disposed between the bottom of the magnetic reinforcement layer (7) and the worktable of the frame (1).

2. A magnet marking machine according to claim 1, characterized in that: The spacing between the array of breathable micropores (9) is 2-3 times the pore diameter.

3. The magnet marking machine of claim 1, wherein: The electromagnet array (6) is composed of honeycomb-shaped micro electromagnet units.

4. The magnet marking machine of claim 1, wherein: The magnetic reinforcement layer (7) is made of 1J22 type permalloy and its surface is treated with insulation.

5. The magnet marking machine of claim 1, wherein: The buffer air cavity layer (8) is connected to the negative pressure air source (10), and the layer is fixed with matrix-distributed elastic support columns (11), the top of which is connected to the magnetically conductive reinforcement layer (7).

6. A magnet marking machine according to claim 5, characterized in that: The elastic support column (11) is a bellows structure filled with non-Newtonian fluid, and a pressure sensor (12) is fixed on its top and connected to the control system (3).

7. A magnet marking machine according to claim 6, characterized in that: The negative pressure air source (10) is connected to the buffer air chamber layer (8) through the PID controller (13). The negative pressure air source (10) and the PID controller (13) are both fixed on the outside of the frame (1). The PID controller (13) receives the signal from the pressure sensor (12) and dynamically adjusts the negative pressure value inside the buffer air chamber layer (8).

8. The magnet marking machine of claim 1, wherein: The breathable micropores (9) are blind holes with closed bottoms, and the closed bottoms have a spherical dome structure.

9. A magnet marking machine according to claim 8, characterized in that: The top opening size of the breathable micropore (9) is smaller than the inner bottom size, forming a conical expansion structure.

10. A magnet marking machine according to claim 9, characterized in that: The axis of the breathable micropore (9) forms an acute angle with the vertical direction.

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