Novel non-contact electromagnetic damping shock absorber

Abstract

The invention is applied to the field of manufacturing industry and vibration reduction, provides a novel non-contact electromagnetic damping vibration absorber which is applied to a saw blade working at a high speed, and aims to provide a vibration reduction mode which can generate a vibration reduction effect on the saw blade and is not in direct contact with the saw blade. The non-contact electromagnetic damping shock absorber is a turning buckle type device and is composed of a permanent magnet, an iron outer shell, a support, a rubber gasket, a supporting aluminum shell, a metal clamp and a metal hinge, the shock absorber and a sawing machine are fixed through bolts, each saw blade uses two shock absorbers, the two shock absorbers are symmetrically distributed, and the two shock absorbers are connected through bolts. The lower right side and the upper left side of the saw blade are respectively fixed; the two permanent magnets are located on the upper side and the lower side of the saw blade correspondingly, and the same poles of the two permanent magnets are opposite. In order to protect the permanent magnet and increase the utilization rate of a magnetic field generated by the permanent magnet, the outer side of the permanent magnet is wrapped by two separated iron shells; the iron shell is not in complete gapless contact with the permanent magnet, and the periphery of the permanent magnet is isolated from the iron shell through the support. The saw blade can generate vibration during high-speed work, at the moment, the vibration can cut a repulsive magnetic field generated by an upper permanent magnet and a lower permanent magnet which are opposite in the same stage, and then eddy current is formed in the saw blade to restrain vibration. Meanwhile, the two permanent magnets with the same poles opposite to each other can magnetize the saw blade, electromagnetic force in the same direction is generated on the saw blade, and vibration generated when the saw blade works is further restrained. According to the design, the electromagnetic force generated by the permanent magnet and the damping characteristic of the permanent magnet are integrated, use of excessive parts is reduced through non-contact vibration reduction, the vibration reduction effect is more single, the service life of the saw blade is effectively prolonged, and the production precision of the saw blade is effectively improved.

Description

Technical Field

[0001] The invention relates to the field of sawing machine vibration reduction control, and in particular to a novel non-contact electromagnetic damping vibration isolator and a vibration reduction method. Background Art

[0002] With the rapid development of high-precision CNC machine tools and ultra-precision machining equipment, vibration suppression has become a key challenge in improving machining quality and extending tool life. Traditional passive vibration reduction is limited by a narrow frequency band and material aging, while active vibration reduction relies on complex control systems, which are costly and have delayed response. Furthermore, contact dampers, due to mechanical wear and heat generation, cannot meet the requirements for long-term stable operation of machine tools.

[0003] Electromagnetic damping technology, due to its non-contact, wear-free, and wide-band response characteristics, has become a research hotspot in the field of machine tool vibration reduction. Based on the principle of electromagnetic induction, this technology dissipates vibration energy through the eddy current effect or Lorentz force generated by the movement of a conductor in a magnetic field, achieving efficient vibration reduction without the need for physical contact. In recent years, advances in high-performance permanent magnet materials (such as neodymium iron boron) and intelligent control algorithms have enabled breakthroughs in the compactness, high response speed, and adaptive adjustment of electromagnetic dampers.

[0004] Machine tool vibrations are characterized by high frequency, small amplitude, and multi-source coupling. Traditional electromagnetic damping solutions suffer from insufficient adaptability, high energy consumption, or complex structures. Therefore, there is an urgent need for a lightweight, low-power, non-contact electromagnetic damper that can be easily integrated into a machine tool spindle or feed system. Summary of the Invention

[0005] In order to overcome the above-mentioned deficiencies in the prior art, the present invention proposes a novel non-contact electromagnetic damping vibration isolator.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] A novel non-contact electromagnetic damping vibration isolator, characterized by comprising a permanent magnet, an iron housing, a bracket, a rubber gasket, a supporting aluminum housing, a metal clamp, and a metal hinge. The bracket is a fastening bolt, one end of which has an external thread structure that engages with the iron bracket and the other end is in non-fixed contact with the supporting aluminum housing. An internal thread structure is provided at a corresponding position on the inner wall of the housing, achieving an adjustable connection with the bracket through threaded engagement. When assembled, the permanent magnet generates a directional magnetic field, interacting with the magnetic conductive material of the housing to form a closed magnetic circuit. The rubber gasket is adhesively connected to the permanent magnet and the supporting aluminum housing. The metal hinge is bolted to the housing to form a reversible snap-fit mechanism. The metal clamp is located on the front side of the housing and, when the housing is snapped together, locks the housing to prevent it from opening. When closed, this mechanism forms a sealed cavity, encapsulating the permanent magnet and the bracket, forming a non-contact vibration damping system. The vibration isolators are symmetrically located on the lower left and upper right sides of the saw blade.

[0008] Preferably, the saw blade electromagnetic damping vibration absorber has a unique non-contact vibration reduction method. The saw blade generates vibration when working at high speed. The vibration cuts the magnetic lines of force, and eddy currents are generated in the saw blade to suppress the vibration of the saw blade. At the same time, due to the magnetization effect of the permanent magnet, the vibration of the saw blade is further suppressed. The magnetic field is used to reduce the vibration of the saw blade, thereby reducing wear and increasing its service life.

[0009] Preferably, rectangular prism-type permanent magnets are used, and magnetization directions of the same level are adopted to generate a transverse magnetic field in the middle of the permanent magnet, so that the saw blade vibrates to cut the magnetic flux lines, thereby reducing vibration; the two permanent magnets are coaxially packaged in the shell by threaded locking to form a closed-loop magnetic circuit carrier.

[0010] Preferably, the vibration damper suppresses the vibration of the high-speed saw blade in a contactless manner, and each sawing machine is equipped with two vibration dampers, which are symmetrically distributed on the upper right and lower left of the band saw blade.

[0011] Preferably, the magnetic circuit is designed to be emitted by the permanent magnet, pass through the saw blade, the iron shell, and finally be absorbed by the permanent magnet, thereby constructing an optimized magnetic conduction path, increasing the transverse magnetic field strength between the permanent magnets, improving the effective working magnetic field strength, and significantly improving the magnetic energy product utilization rate.

[0012] Preferably, the outer shell is made of an iron-based alloy material with soft magnetic properties, which on the one hand forms electromagnetic shielding protection for the permanent magnet and effectively suppresses external stray magnetic field interference; at the same time, the height of the outer shell on the left and right sides of the permanent magnet is less than the height of the rubber gasket, preventing the saw blade from hitting the outer shell first during violent vibration and causing damage or deformation.

[0013] Preferably, the bracket is in the form of a bolt, with an external thread on the outer end and the inner side cooperating with the groove of the supporting aluminum shell, and is fastened between the shell and the permanent magnet to form an electromagnetic isolation barrier; at the same time, the bracket plays a position limiting role for the permanent magnet, so that the permanent magnet can always be maintained in the center position of the shell, preventing position deviation caused by the attraction or repulsion of the iron shell on the permanent magnet.

[0014] Preferably, the rubber gasket and the permanent magnet are interference-wrapped, that is, a mechanical limit is formed to avoid additional impact of the saw blade on the permanent magnet when the saw blade amplitude is too large.

[0015] Compared with the prior art, the novel non-contact electromagnetic damping vibration absorber disclosed in the present invention has the following advantages:

[0016] Beneficial effects:

[0017] By leveraging the damping properties of permanent magnets and the magnetization phenomenon to generate electromagnetic force, this not only achieves a stable damping effect, but also significantly reduces the purchase and maintenance costs of the shock absorber, improving its practicality. This new non-contact electromagnetic damping shock absorber maintains excellent vibration damping performance while significantly reducing costs, thus opening up a new direction for the future development of machine tool vibration reduction technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. 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 these drawings without creative work.

[0019] Figure 1 The non-contact electromagnetic damping vibration reduction system disclosed in the present invention

[0020] Figure 2 Closed three-dimensional view of the non-contact electromagnetic damping vibration isolator disclosed in the present invention

[0021] Figure 3 This is the internal structure diagram of the non-contact electromagnetic damping vibration absorber disclosed in the present invention

[0022] Figure 4 Left view of the non-contact electromagnetic damping vibration absorber disclosed in the present invention

[0023] Figure 5 The overall cross-sectional view of the non-contact electromagnetic damping vibration absorber disclosed in the present invention

[0024] Figure 6 A partial diagram of the connection method of the bracket, supporting aluminum shell, and rubber gasket in the non-contact electromagnetic damping vibration absorber disclosed in the present invention

[0025] Figure 7 Left side cross-sectional view of the non-contact electromagnetic damping vibration absorber disclosed in the present invention

[0026] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0027] 1-permanent magnet, 2-housing, 3-bracket, 4-metal clamp, 5-metal hinge, 6-rubber gasket, 7-support aluminum shell DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making any creative efforts shall fall within the scope of protection of the present invention.

[0029] The specific solution of a novel non-contact electromagnetic damping vibration isolator provided by the present invention is described in detail below with reference to the accompanying drawings. Specific embodiment:

[0031] like Figure 2 As shown, this embodiment includes: 1-permanent magnet, 2-housing, 3-bracket, 4-metal clamp, 5-metal hinge, 6-rubber gasket, 7-support aluminum shell. The bracket 3 is in the form of a fastening bolt, one end of which is provided with an external thread structure to engage with the iron shell 2, and the other end is in non-fixed contact with the supporting aluminum shell 7; an internal thread structure is provided at the corresponding position of the inner wall of the shell 2, and an adjustable connection with the bracket 3 is achieved by threaded engagement; the permanent magnet 1 generates a directional magnetic field in the assembled state, and interacts with the magnetic conductive material of the shell 2 to form a closed magnetic circuit; the rubber gasket 6 is adhesively connected to the permanent magnet 1 and the supporting aluminum shell 7 by adhesive; the metal hinge 5 forms a reversible buckling mechanism with the shell 2 through bolts; the metal clamp 4 is located on the front side of the shell 2, and when the shell 2 is buckled, the metal clamp 4 will lock the shell 2 to prevent it from opening; when the mechanism is closed, it forms a closed cavity, encapsulating the permanent magnet 1 and the bracket 3 therein, forming a non-contact vibration damping system; the shock absorber 1 is symmetrically distributed at the lower left and upper right of the saw blade.

[0032] One embodiment of the present invention is to design a new type of non-contact electromagnetic damping shock absorber, which is a flip-up device that can be disassembled when the device stops working and is specifically used in sawing machines. The shock absorber is provided with a rectangular shell 2 on the outermost side, which is composed of two identical iron rectangular cavities. The two rectangular cavities are connected by a movable metal hinge 5, which increases the convenience of the shock absorber disassembly process; at the same time, a metal clamp 4 is added to the front side of the shell 2. When the two permanent magnets repel each other, the two parts of the cavity shell may not close due to excessive repulsion or vibration of the working machine tool. The metal clamp 4 effectively avoids this situation. The two permanent magnets 1 are respectively located in the center of the upper and lower rectangular cavities and are coaxially placed on the shell 2. The magnetization directions of the two permanent magnets 1 are opposite to each other at the same level, so that the magnetic field generated between the two permanent magnets is horizontal. The outer shell 2 is a four-sided surround type, with the top in contact with the permanent magnet 1 and the other four sides not in contact, to isolate the permanent magnet from the influence of the external magnetic field environment. This is designed to allow more transverse magnetic fields to play a role when the saw blade vibrates up and down between the two permanent magnets, thereby better reducing vibration. The sides of the permanent magnet 1 are wrapped with rubber gaskets 6, and their length is greater than the left and right sides of the outer shell 2. The longer part forms a mechanical limit to protect the permanent magnet from damage. Eight brackets 3 are used between the permanent magnet 1 and the outer shell 2. They are connected to the grooves on the supporting aluminum shell 7 in a mortise and tenon manner and are connected to the outer shell 2 by threads to control the position of the permanent magnet 1 in the center. The supporting aluminum shell 7, the permanent magnet 1, and the rubber gasket 6 are bonded by adhesive for surface contact. When the saw blade vibrates, it cuts the transverse magnetic field generated by the permanent magnet 1, thereby generating eddy currents inside the saw blade, thereby suppressing the saw blade vibration. At the same time, due to the magnetization effect, the two permanent magnets 1 will generate electromagnetic forces in the same direction on the saw blade, further suppressing the saw blade vibration. All of the above components are designed to achieve this vibration reduction method.

[0033] Furthermore, the device utilizes a structure with upper and lower permanent magnets, each magnetized axially in opposite directions, creating a coupled mechanism of repulsion and attraction for the saw blade. This magnetic pole configuration effectively suppresses saw blade vibration through a magnetic coupling effect, where the repulsive magnetic field generated by the upper magnet and the attractive magnetic field of the lower magnet work together to form a dynamically balanced vibration reduction system.

[0034] Furthermore, the permanent magnet assembly adopts a dual-rectangular prism symmetrical structure design. Two permanent magnets with the same polarity, positioned opposite each other, are coaxially positioned via a threaded fastening mechanism and integrated into the housing to form a closed magnetic circuit. The innovative same-polarity reverse magnetization method generates a high-intensity transverse magnetic field in the magnetic gap region. When the saw blade reciprocates within this field, the electromagnetic induction effect generates a Lorentz force opposite to the vibration direction, thus forming an effective vibration damping mechanism. This packaging structure not only achieves an optimized magnetic circuit design, but its modular assembly method also enhances the maintainability of the device.

[0035] In summary, the novel non-contact electromagnetic damping vibration isolator of the present invention integrates electromagnetic induction and electromagnetic force, is applicable to various saw blade vibration frequencies, reduces vibration generated by high-speed saw blade operation, increases saw blade service life, and improves sawing machine precision. The use of rectangular permanent magnets of equal magnitude achieves high damping in a compact size. A semi-enclosed iron rectangular housing reduces electromagnetic interference, optimizes the magnetic circuit design, protects the permanent magnets from impact, and reduces permanent magnet consumption. A metal clamp prevents magnetic circuit consumption caused by excessive electromagnetic force or high-frequency saw blade vibration. A threaded connection and metal hinges enhance the device's modular assembly simplicity. This device provides a novel method for reducing saw blade vibration, improving production precision, and reducing production and maintenance costs. It provides an innovative approach to reducing saw blade vibration and has significant practical significance. While embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A non-contact saw blade damping vibration absorber, characterized in that: It consists of a permanent magnet, an outer shell, a bracket, a rubber gasket, a supporting aluminum shell, a metal clamp, and a metal hinge. The bracket is in the form of a fastening bolt, one end of which is provided with an external thread structure to engage with the iron bracket, and the other end is in non-fixed contact with the supporting aluminum shell. The inner wall of the outer shell is provided with an internal thread structure at a corresponding position, and an adjustable connection with the bracket is achieved through threaded engagement. The permanent magnet generates a directional magnetic field in the assembled state, interacting with the magnetic conductive material of the outer shell to form a closed magnetic circuit. The rubber gasket is adhesively connected to the permanent magnet and the supporting aluminum shell. The metal hinge is connected to the outer shell by bolts to form a reversible buckling mechanism. The metal clamp is located on the front side of the outer shell. When the outer shell is buckled, the metal clamp locks the outer shell to prevent it from opening. When the mechanism is closed, it forms a closed cavity, encapsulating the permanent magnet and the bracket, forming a non-contact vibration damping system. The vibration dampers are symmetrically distributed on the upper left and lower right of the saw blade.

2. A saw blade electromagnetic damping vibration absorber according to claim 1, characterized in that: The saw blade damping vibration absorber has a unique non-contact vibration reduction method. The saw blade generates vibration when working at high speed. The vibration cuts the magnetic flux lines, and eddy currents are generated in the saw blade to suppress the vibration of the saw blade. At the same time, due to the magnetization effect of the permanent magnet, the vibration of the saw blade is further suppressed. The magnetic field is used to reduce the vibration of the saw blade, thereby reducing wear and increasing its service life.

3. The permanent magnet according to claim 1, characterized in that A rectangular prism-type permanent magnet is used, and magnetization directions of the same level and relative to each other are adopted, thereby generating a transverse magnetic field in the middle of the permanent magnet, causing the saw blade to vibrate to cut the magnetic flux lines, thereby reducing vibration; the two permanent magnets are coaxially packaged in the housing by means of threaded locking to form a closed-loop magnetic circuit carrier.

4. The non-contact electromagnetic damping vibration absorber for saw blades according to claim 1, characterized in that: The vibration damper suppresses the vibration of the high-speed saw blade in a contactless manner. Two vibration dampers are installed on each sawing machine and are symmetrically distributed on the upper left and lower right of the band saw blade.

5. The permanent magnet according to claim 3, characterized in that: The magnetic circuit is designed to be emitted from the permanent magnet, pass through the saw blade, the iron shell, and finally be absorbed by the permanent magnet, thereby constructing an optimized magnetic conduction path, increasing the transverse magnetic field strength between the permanent magnets, improving the effective working magnetic field strength, and significantly improving the magnetic energy product utilization rate.

6. The housing according to claim 1, wherein: The outer shell is made of an iron-based alloy material with soft magnetic properties. On the one hand, it forms electromagnetic shielding protection for the permanent magnet, effectively suppressing external stray magnetic field interference; at the same time, the height of the outer shell on the left and right sides of the permanent magnet is less than the height of the rubber gasket, preventing the saw blade from hitting the outer shell first during violent vibration and causing damage or deformation.

7. The bracket according to claim 1, characterized in that: The bracket adopts a double insurance form of bolts and springs, with an external thread on the outer end and the inner side cooperating with the groove of the supporting aluminum shell, fastened between the shell and the permanent magnet to form an electromagnetic isolation barrier; at the same time, the bracket plays a position limiting role for the permanent magnet, so that the permanent magnet can always be maintained at the center position of the shell, preventing position deviation caused by the attraction or repulsion of the iron shell on the permanent magnet.

8. The rubber gasket according to claim 1, characterized in that: The rubber gasket and the permanent magnet are interference-wrapped, forming a mechanical limit, which is intended to avoid additional impact of the saw blade on the permanent magnet when the saw blade amplitude is too large.

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