Machining forming method and machining device for multi-scale microstructure surface

Abstract

The invention belongs to the technical field of fine precision machining and manufacturing, and particularly provides a machining forming method and a machining device for a multi-scale microstructure surface, and the device comprises a special-shaped groove which is internally provided with a coil; the objective table is used for placing a to-be-processed object, a containing cavity is formed in the top of the special-shaped groove, the containing cavity is located on one side of the coil, and the objective table is placed in the containing cavity; the elastic piece is fixed in the containing cavity, and the elastic piece is located between the objective table and the coil; and the magnet is installed in the objective table and located on the side, close to the coil, of the objective table. The polarity of a magnetic field generated by the coil is periodically changed by introducing alternating current with preset frequency, so that the objective table moves in the special-shaped groove, and high-speed reciprocating motion of the objective table in the special-shaped groove is realized under the limiting action of the elastic piece and the special-shaped groove, so that low-frequency vibration of the objective table is realized, and multi-scale surface machining of a workpiece is realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of micro-precision machining and manufacturing, and in particular relates to a machining and forming method and a machining device for a multi-scale microstructure surface. Background Art

[0002] Multiscale microstructured surfaces play an important role in enhancing mass transfer and heat transfer, which is mainly reflected in the following aspects: (1) Large specific surface area: Multiscale microstructured surfaces have a larger surface area, which can improve the efficiency of mass transfer and heat transfer and produce a microscopic disturbance effect on the flow of the fluid; (2) High contact rate of the mass transfer and heat transfer interface: Multiscale microstructured surfaces can increase the contact rate of the mass transfer and heat transfer interface, allowing the heat transfer medium to more fully contact the heat transfer surface, thereby improving the heat transfer efficiency; (3) Regulatable surface wettability: By regulating the wettability of the multiscale microstructured surface, the contact between the heat transfer medium and the surface can be improved, thereby enhancing the heat transfer effect; (4) Controllable surface temperature distribution: Multiscale microstructured surfaces can control the temperature distribution of the heat transfer medium by adjusting the surface structure and material properties, thereby optimizing the heat transfer process.

[0003] At present, the main methods for forming multi-scale surfaces are: laser processing, ion beam etching, plasma etching, nanoimprinting, chemical corrosion, etc. The above forming methods have problems such as high cost and difficulty in mass production.

[0004] Based on this, the present invention provides a method and a device for processing and forming a multi-scale microstructure surface to solve the above problems. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, the present invention provides a method and a device for processing and forming a multi-scale microstructure surface to solve the problems in the prior art.

[0006] One embodiment of the present invention provides a method for processing a multi-scale microstructure surface, comprising the following steps:

[0007] An alternating current of a preset frequency is supplied to the coil, so that the magnet in the stage on one side of the coil is subjected to a magnetic field force from the coil, which includes an attractive force and a repulsive force;

[0008] The magnet inside the stage is subject to the magnetic field force F of the coil. m After the action, the stage overcomes the friction force f and the elastic force F of the elastic member in the special-shaped groove. t Do work and move back and forth in the direction of approaching or moving away from the coil, so that the stage will vibrate periodically at a low frequency in the special-shaped slot. Assuming the resultant force F on the stage in the special-shaped slot, the motion characteristic of the stage is: F = Fm-f-Ft, where:

[0009]

[0010] Pm is the magnetic moment of the bar magnet, μ is the magnetic permeability of the bar magnet, L is the length of the coil, N is the number of turns of the coil, R is the radius of the coil, I(t) is the alternating current, and d is the distance between the bar magnet and the conductive coil;

[0011] Fix the workpiece to be processed on a stage in a low-frequency vibration state so that the workpiece follows the vibration;

[0012] The surface of the workpiece on the stage in a low-frequency vibration state is processed by a processing tool to complete the multi-scale microstructure surface processing of the workpiece.

[0013] In one embodiment, when the magnet in the carrier is attracted by the coil, friction is generated between the carrier and the bottom of the special-shaped groove and the carrier squeezes the elastic member. When the attraction is greater than the sum of the friction force and the elastic force of the elastic member, the carrier moves in the special-shaped groove toward the coil.

[0014] In one embodiment, when the magnet in the stage is subjected to the repulsive force of the coil, friction is generated between the stage and the bottom of the special-shaped groove and the stage is subjected to the force of the elastic member. When the sum of the repulsive force and the force of the elastic member is greater than the friction force, the stage moves in the special-shaped groove in a direction away from the coil.

[0015] A processing device for a multi-scale microstructure surface, used to implement the processing and forming method of the multi-scale microstructure surface as described above, the processing device comprising:

[0016] A special-shaped slot, wherein a coil is arranged inside the special-shaped slot;

[0017] A stage, the stage is used to place the object to be processed, a receiving cavity is provided at the top of the special-shaped groove, the receiving cavity is located on one side of the coil, and the stage is placed in the receiving cavity;

[0018] An elastic member, the elastic member is fixed in the accommodating cavity, and the elastic member is located between the stage and the coil;

[0019] The magnet is installed inside the stage and is located on a side of the stage close to the coil.

[0020] In one of the embodiments, the top of the accommodating cavity is closed, and the top of the loading platform abuts against the inner top wall of the special-shaped groove.

[0021] In one of the embodiments, one end of the loading platform along the direction of the magnetic field force abuts against the elastic member, and the other end of the loading platform along the direction of the magnetic field force abuts against the inner wall of the special-shaped groove.

[0022] In one embodiment, the distance between the coil and the magnet is 0 to 10 mm.

[0023] The multi-scale microstructure surface processing method and processing device provided in the above embodiments have the following beneficial effects:

[0024] 1. By passing an alternating current of a preset frequency, the polarity of the magnetic field generated by the coil changes periodically, causing the coil to generate periodic attraction and repulsion on the magnet in the stage, so that the resultant force F exerted on the stage in the special-shaped groove changes regularly, so that the stage moves in the special-shaped groove. Combined with the limiting effect of the elastic part and the special-shaped groove, the stage can reciprocate at high speed in the special-shaped groove, thereby realizing low-frequency vibration of the stage, so as to realize the processing of multi-scale surfaces of the workpiece.

[0025] 2. By changing the frequency and voltage of the coil alternating current and controlling the magnetic field force, different cutting forces and vibration frequencies can be obtained to achieve the processing of different multi-scale microstructure surfaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the structure of a processing device for a multi-scale microstructure surface provided by an embodiment of the present invention;

[0028] Figure 2 for Figure 1 Schematic diagram of placing a workpiece to be processed in a processing device for a multi-scale microstructure surface;

[0029] Figure 3 for Figure 2 Schematic diagram of the surface structure of a workpiece after the surface of the workpiece is processed by the processing device for the multi-scale microstructure surface.

[0030] Figure Number:

[0031] 1. Coil; 2. Elastic part; 3. Magnet; 4. Stage; 5. Special-shaped slot; 6. Workpiece; 7. Processing tool. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0034] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0035] Reference Figure 1-Figure 3 One embodiment of the present invention provides a processing device for a multi-scale microstructure surface, including a special-shaped groove 5, a coil 1, a stage 4, an elastic member 2, and a magnet 3. The special-shaped groove 5 is used to install the coil 1, the stage 4, and the elastic member 2, and the magnet 3 is fixed inside the stage 4; the coil 1 is used to connect the alternating current to generate a magnetic field. Since the coil 1 is connected to the alternating current of a preset frequency, the magnetic pole direction of the magnetic field generated by the coil 1 will change periodically; the stage 4 is used to place a workpiece 6 to be processed; the elastic member 2 is used to provide elastic force for the stage 4; the magnet 3 is used to generate a mutual force with the magnetic field generated by the coil 1.

[0036] The coil 1 is installed inside one side of the special-shaped groove 5; a receiving cavity is opened at the top of the special-shaped groove 5, and the stage 4 is placed in the receiving cavity, and the top of the receiving cavity is closed, and the top of the stage 4 abuts against the inner top wall of the special-shaped groove 5; the elastic member 2 is fixed in the receiving cavity, the elastic member 2 is located between the stage 4 and the coil 1, and the stage 4 is located on one side of the coil 1 in the horizontal direction; when the stage 4 is placed in the special-shaped groove 5, the two ends of the elastic member 2 are in contact with the stage 4 and the special-shaped groove 5 respectively, and the side of the elastic member 2 in contact with the stage 4 is arc-shaped;

[0037] The two ends of the stage 4 along the horizontal direction of the magnetic field force are in contact with the inner wall of the special-shaped groove 5 and the elastic member 2 respectively; the magnet 3 is bar-shaped and horizontally installed in the stage 4, and the magnet 3 is located on the side of the stage 4 close to the coil 1, and the distance between the coil 1 and the magnet 3 is 0 to 10 mm, so that the magnetic force is always maintained in a normal state without weakening, thereby achieving effective effect.

[0038] In this embodiment, the principle is as follows: magnet 3 is relatively fixed to stage 4, coil 1 is relatively fixed to special-shaped slot 5, stage 4 and special-shaped slot 5 are supported by elastic member 2, and when alternating current is applied to coil 1, stage 4 will generate low-frequency vibration. When the magnetic field force generated by coil 1 is in the positive direction of x-axis (i.e., away from stage 4) and is greater than the elastic force generated by elastic member 2 and the mutual friction between stage 4 and special-shaped slot, stage 4 is subjected to a force in the direction close to coil 1, and the acceleration is in the positive direction of x-axis, and has a tendency to move in the positive direction of x-axis. Due to the action of elastic member 2, stage 4 moves in the positive direction of x-axis after a period of action of magnetic field force; when the magnetic field force generated by coil 1 is in the negative direction of x-axis (i.e., toward stage 4) and the vector sum of the elastic force generated by elastic member 2 is greater than stage 4, stage 4 will be subjected to a force in the direction close to coil 1, and the acceleration is in the positive direction of x-axis, and has a tendency to move in the positive direction of x-axis. Due to the action of elastic member 2, stage 4 moves in the positive direction of x-axis after a period of action of magnetic field force. 4 and the special-shaped groove, the stage 4 will move in the direction away from the coil 1. Based on the kinematic principle, the relative vibration of the stage 4 and the processing tool 7 can be achieved. Therefore, the movement of the processing tool 7 relative to the surface of the workpiece 6 adds low-frequency vibration in addition to the main movement. The combination of the device and the processing tool 7 can realize the processing of multi-scale surfaces of the workpiece 6. The processing tool 7 includes but is not limited to (micro) milling cutters, (micro) grinders, saw blades, saw wires, etc. The device is simple and easy to operate, and innovatively solves the problems existing in the existing processing of multi-scale microstructure surfaces.

[0039] One embodiment of the present invention provides a method for processing a multi-scale microstructure surface, comprising the following steps:

[0040] S1, passing an alternating current of a preset frequency into the coil 1, so that the magnet 3 in the stage 4 on one side of the coil 1 is subjected to a magnetic field force from the coil 1, and the magnetic field force includes an attractive force and a repulsive force;

[0041] S2, the magnet 3 in the stage 4 is subjected to the magnetic field force F of the coil 1m After the action, the stage 4 overcomes the friction force f and the elastic force F of the elastic member 2 in the special-shaped groove 5. t Work is done and reciprocatingly moves toward or away from the coil 1, causing the stage 4 to vibrate periodically at a low frequency in the special-shaped slot 5. Assuming the resultant force F on the stage 4 in the special-shaped slot, the motion characteristic of the stage is: F = Fm-f-Ft, where:

[0042]

[0043] Pm is the magnetic moment of the bar magnet 3, μ is the magnetic permeability of the bar magnet 3, L is the length of the coil 1, N is the number of turns of the coil 1, R is the radius of the coil 1, I(t) is the alternating current, and d is the distance between the bar magnet 3 and the coil 1;

[0044] Specifically, when the magnetic field generated by the coil 1 is in the direction of the stage 4, the force between the magnet 3 in the stage 4 and the coil 1 is an attractive force; that is, when the polarity generated by the coil 1 is opposite to the polarity of the corresponding magnet 3, the force between the coil 1 and the stage 4 is an attractive force, and the stage 4 moves close to the coil 1 due to the attractive force of the coil 1, and is simultaneously subjected to the reaction force of the elastic member 2. When the magnetic field generated by the coil 1 is away from the direction of the stage 4, the force between the magnet 3 in the stage 4 and the coil 1 is a repulsive force; that is, when the polarity generated by the coil 1 is the same as the polarity of the corresponding magnet 3, the force between the coil 1 and the stage 4 is a repulsive force, and the stage 4 is subjected to a force in the direction away from the coil 1, and is simultaneously subjected to the elastic force, and has a tendency to move away from the coil 1. Due to the periodic change in the direction of the magnetic pole of the coil 1, the stage 4 also has periodic oscillations. When the tool cuts the workpiece 6 on the periodically oscillating stage 4, a multi-level microstructure will be formed, thereby realizing multi-scale surface processing.

[0045] S3, fixing the workpiece 6 to be processed on the stage 4 which is in a low-frequency vibration state, so that the workpiece 6 follows the vibration;

[0046] S4. Use the processing tool 7 to process the surface of the workpiece 6 on the stage 4 in the low-frequency vibration state to complete the multi-scale microstructure surface processing of the workpiece 6.

[0047] As needed, the above-mentioned installation, setting, provision or connection methods include but are not limited to installation, setting or connection by screws, riveting, welding or socketing, fixing, etc., and the installation, setting or connection method is selected according to the needs of the working scenario.

[0048] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A method for processing and forming a multi-scale microstructure surface, characterized in that: The steps include: An alternating current of a preset frequency is supplied to the coil, so that the magnet in the stage on one side of the coil is subjected to a magnetic field force from the coil, which includes an attractive force and a repulsive force; The magnet inside the stage is subject to the magnetic field force F of the coil. m After the action, the stage overcomes the friction force f and the elastic force F of the elastic member in the special-shaped groove. t Do work and move back and forth in the direction of approaching or moving away from the coil, so that the stage will vibrate periodically at a low frequency in the special-shaped slot. Assuming the resultant force F on the stage in the special-shaped slot, the motion characteristic of the stage is: F = Fm-f-Ft ， in: Pm is the magnetic moment of the magnet, μ is the magnetic permeability of the magnet, L is the length of the coil, N is the number of turns of the coil, R is the radius of the coil, I(t) is the alternating current, and d is the distance between the magnet and the coil; Fix the workpiece to be processed on a stage in a low-frequency vibration state so that the workpiece follows the vibration; The surface of the workpiece on the stage in a low-frequency vibration state is processed by a processing tool to complete the multi-scale microstructure surface processing of the workpiece.

2. The method for processing a multi-scale microstructure surface as claimed in claim 1, characterized in that: When the magnet in the stage is attracted by the coil, friction is generated between the stage and the bottom of the special-shaped groove and the stage squeezes the elastic part. When the attraction is greater than the sum of the friction and the elastic force of the elastic part, the stage moves in the special-shaped groove toward the coil.

3. The method for processing a multi-scale microstructure surface as claimed in claim 1, characterized in that: When the magnet in the stage is repelled by the coil, friction is generated between the stage and the bottom of the special-shaped groove and the stage is acted upon by the elastic member. When the sum of the repulsive force and the force of the elastic member is greater than the friction force, the stage moves in the special-shaped groove away from the coil.

4. A processing device for a multi-scale microstructure surface, used to implement the processing and forming method of a multi-scale microstructure surface as claimed in any one of claims 1 to 3, characterized in that: include: A special-shaped slot, wherein a coil is arranged inside the special-shaped slot; A stage, the stage is used to place the object to be processed, a receiving cavity is provided at the top of the special-shaped groove, the receiving cavity is located on one side of the coil, and the stage is placed in the receiving cavity; An elastic member, the elastic member is fixed in the accommodating cavity, and the elastic member is located between the stage and the coil; The magnet is installed inside the stage and is located on a side of the stage close to the coil.

5. The processing device for a multi-scale microstructure surface as claimed in claim 4, characterized in that: The top of the accommodating cavity is closed, and the top of the loading platform abuts against the inner top wall of the special-shaped groove.

6. The processing device for a multi-scale microstructure surface as claimed in claim 4, characterized in that: One end of the loading platform along the direction of the magnetic field force abuts against the elastic member, and the other end of the loading platform along the direction of the magnetic field force abuts against the inner wall of the special-shaped groove.

7. The processing device for a multi-scale microstructure surface as claimed in claim 4, characterized in that: The distance between the coil and the magnet is 0 to 10 mm.

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