Vibration reduction process method based on combination of liquid medium and double-mass sphere

Abstract

The invention discloses a vibration reduction process method based on combination of a liquid medium and a double-mass sphere, and particularly relates to the technical field of machining, which comprises the following steps: step 1, by utilizing the principle that the sphere can freely float in the liquid medium, placing two kinds of spheres with different densities in the liquid medium, under the action of centrifugal force generated by rotation of the workpiece, the ball body is attached to the inner surface of the workpiece to form a layer capable of absorbing vibration energy, and the vibration energy of the workpiece is transmitted to a liquid medium and a machine tool system; 2, the high-density balls mainly absorb vibration impact energy, and the low-density balls efficiently transmit self vibration displacement to a liquid medium in a liquid volume discharging mode (displacement) mainly by means of the large density difference between the low-density balls and the liquid medium. The problems caused by vibration in precision machining of the hollow thin-wall slender shaft are solved.

Description

Technical Field

[0001] The present invention relates to the field of mechanical processing technology, and more specifically, to a vibration reduction process method based on the combination of a liquid medium and a double-mass sphere. Background Art

[0002] The aviation and aerospace industries have high requirements on materials and weight of parts, which requires continuous optimization and improvement of process technology. Most of the metal materials used in aviation and aerospace have the characteristics of high temperature resistance, high strength and high toughness. The material components mainly include iron, titanium, chromium, cobalt, nickel, vanadium, tungsten, molybdenum and manganese, forming high-quality alloy steel.

[0003] With high-quality alloy steel as the basis, the parts design also presents the characteristics of thin wall, slenderness and high precision for the purpose of weight control. In conventional mechanical processing, grinding is one of the important means of high-precision processing. However, the high strength and high toughness of aviation materials are prone to produce high temperature environment locally during the grinding process, forming grinding cracks. The series of chemical reactions formed by high temperature also form a surface strengthening effect, making the processing performance of the material worse.

[0004] Microcracks and microdefects on the workpiece surface are often difficult to control and solve. Given the sensitivity of aviation products to microcracks and microdefects, conventional turning is more controllable. The three processing features of thin wall, slenderness and high precision are simultaneously added to the workpiece, and turning is used, which makes the processing difficult. The key to its dimensional accuracy control and roughness control lies in controlling vibration during the processing process.

[0005] Therefore, there is an urgent need for a vibration reduction process method based on a combination of a liquid medium and a double-mass sphere to solve the above problems. Summary of the invention

[0006] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a vibration reduction process method based on a combination of a liquid medium and a double-mass sphere. The present invention utilizes the principle that spheres of different densities can float freely in a liquid medium. Under the action of the centrifugal force generated by the rotation of the workpiece, the sphere forms a layer that can absorb vibration energy and adheres to the inner surface of the workpiece. The high-density sphere mainly absorbs vibration impact energy, and the low-density sphere mainly utilizes the large density difference between itself and the liquid medium to efficiently transfer its own vibration displacement to the liquid medium in the form of displacement. The mixture formed by the liquid medium and the double-mass sphere is divided into multiple continuous cabins by O-rings on the core shaft. Each cabin independently completes the vibration absorption function to avoid resonance due to a disordered state or mutual cancellation of vibration absorption functions. The number of cabins can be increased or decreased according to the length of the core shaft, which solves the problem caused by vibration in the precision machining of hollow thin-walled slender shafts, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: a vibration reduction process method based on the combination of a liquid medium and a double-mass sphere, comprising the following steps: Step 1: Using the principle that spheres can float freely in liquid media, two spheres of different densities are placed in the liquid medium. Under the centrifugal force generated by the rotation of the workpiece, the spheres adhere to the inner surface of the workpiece to form a layer that can absorb vibration energy, and transmit the vibration energy of the workpiece to the liquid medium and the machine tool system; Step 2: The high-density sphere mainly absorbs vibration impact energy, while the low-density sphere mainly utilizes the large density difference between itself and the liquid medium to efficiently transfer its own vibration displacement to the liquid medium by displacing the liquid volume (displacement); Step 3: Using the continuous multi-compartment method, the mixture formed by the liquid medium and the double-mass sphere is divided into multiple continuous chambers on the core shaft by O-rings. Each chamber independently completes the vibration absorption function to avoid resonance due to disorder or mutual reduction of vibration absorption function. The number of chambers can be increased or decreased according to the length of the core shaft; Step 4: The V-shaped surface of the core shaft of the isolation unit is made into a sawtooth shape with large corrugations to increase the vibration absorption area of ​​the core shaft. The vibration waves transmitted by the liquid medium are continuously absorbed, reflected and attenuated by the sawtooth; Step 5: The workpieces are positioned based on the center holes at both ends. When the workpiece is long, the distance between the two centers is large. There are only O-rings and liquid medium mixtures in between, and the overall rigidity is slightly insufficient. After the workpiece is positioned, the liquid metal is poured into the gap between the mandrel and the workpiece through the built-in flow channel. Since the liquid metal has good fluidity and a low melting point (80°), the pouring does not affect the positioning of the workpiece. After solidification, the mandrel and the workpiece are combined into a whole, ensuring the stability of the process system. After processing, the low-temperature alloy can be welded and separated in a hot water environment without residue.

[0008] Technical effects and advantages of the present invention: The present invention utilizes the principle that a sphere can float freely in a liquid medium, places two spheres of different densities in the liquid medium, and under the centrifugal force generated by the rotation of the workpiece, the spheres adhere to the inner surface of the workpiece to form a layer that can absorb vibration energy, and transmit the vibration energy of the workpiece to the liquid medium and the machine tool system. The high-density sphere mainly absorbs vibration impact energy, and the low-density sphere mainly utilizes the large density difference between itself and the liquid medium to efficiently transmit its own vibration displacement to the liquid medium in the form of displacing the liquid volume (displacement). The continuous multi-compartment method is adopted, and the liquid medium and the double-mass spheres are connected. The hybrid formed by the body is divided into multiple continuous chambers on the mandrel by O-rings. Each chamber independently completes the vibration absorption function to avoid resonance or mutual reduction of vibration absorption functions due to disordered state. The number of chambers can be increased or decreased according to the length of the mandrel. The V-shaped surface of the isolation unit mandrel is made into a large corrugated sawtooth shape to increase the vibration absorption area of ​​the mandrel. The vibration wave transmitted by the liquid medium is continuously absorbed, reflected and attenuated by the sawtooth. The workpiece is positioned based on the top holes at both ends. When the workpiece is long, the distance between the two tops is large. There are only O-rings and liquid medium mixtures during the period, and the overall rigidity Slightly insufficient, after the workpiece is positioned, the liquid metal is poured into the gap between the mandrel and the workpiece through the built-in flow channel. Since the liquid metal has good fluidity and a low melting point (80°), the positioning of the workpiece is not affected after pouring. After solidification, the mandrel and the workpiece are combined into a whole, ensuring the stability of the process system. After the processing is completed, the low-temperature alloy can be welded and separated in a hot water environment without residue. The present invention uses the principle that spheres of different densities can float freely in a liquid medium. Under the centrifugal force generated by the rotation of the workpiece, the spheres form a body that can absorb vibration energy. layer and fit to the inner surface of the workpiece. The high-density sphere mainly absorbs vibration impact energy, and the low-density sphere mainly utilizes the large density difference between itself and the liquid medium to efficiently transfer its own vibration displacement to the liquid medium in the form of displacement. The mixture formed by the liquid medium and the double-mass sphere is divided into multiple continuous cabins on the core shaft by O-rings. Each cabin independently completes the vibration absorption function to avoid resonance due to disorder or mutual reduction of vibration absorption function. The number of cabins can be increased or decreased according to the length of the core shaft, which solves the problem of vibration caused by precision machining of hollow thin-walled slender shafts. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0010] Figure 2 It is a schematic diagram of the structure of the double-mass sphere vibration absorption layer of the present invention. DETAILED DESCRIPTION

[0011] 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.

[0012] As attached Figure 1 and attached Figure 2 As shown, the present invention provides a vibration reduction process method based on the combination of a liquid medium and a double-mass sphere, comprising the following steps: Step 1: Using the principle that spheres can float freely in liquid media, two spheres of different densities are placed in the liquid medium. Under the centrifugal force generated by the rotation of the workpiece, the spheres adhere to the inner surface of the workpiece to form a layer that can absorb vibration energy, and transmit the vibration energy of the workpiece to the liquid medium and the machine tool system; Step 2: The high-density sphere mainly absorbs vibration impact energy, while the low-density sphere mainly utilizes the large density difference between itself and the liquid medium to efficiently transfer its own vibration displacement to the liquid medium by displacing the liquid volume (displacement); Step 3: Using the continuous multi-compartment method, the mixture formed by the liquid medium and the double-mass sphere is divided into multiple continuous chambers on the core shaft by O-rings. Each chamber independently completes the vibration absorption function to avoid resonance due to disorder or mutual reduction of vibration absorption function. The number of chambers can be increased or decreased according to the length of the core shaft; Step 4: The V-shaped surface of the core shaft of the isolation unit is made into a sawtooth shape with large corrugations to increase the vibration absorption area of ​​the core shaft. The vibration waves transmitted by the liquid medium are continuously absorbed, reflected and attenuated by the sawtooth; Step 5: The workpieces are positioned based on the center holes at both ends. When the workpiece is long, the distance between the two centers is large. There are only O-rings and liquid medium mixtures in between, and the overall rigidity is slightly insufficient. After the workpiece is positioned, the liquid metal is poured into the gap between the mandrel and the workpiece through the built-in flow channel. Since the liquid metal has good fluidity and a low melting point (80°), the pouring does not affect the positioning of the workpiece. After solidification, the mandrel and the workpiece are combined into a whole, ensuring the stability of the process system. After processing, the low-temperature alloy can be welded and separated in a hot water environment without residue.

[0013] The present invention utilizes the principle that a sphere can float freely in a liquid medium, places two spheres of different densities in the liquid medium, and under the centrifugal force generated by the rotation of the workpiece, the spheres adhere to the inner surface of the workpiece to form a layer that can absorb vibration energy, and transmit the vibration energy of the workpiece to the liquid medium and the machine tool system. The high-density sphere mainly absorbs vibration impact energy, and the low-density sphere mainly utilizes the large density difference between itself and the liquid medium to efficiently transmit its own vibration displacement to the liquid medium in the form of displacing the liquid volume (displacement). The continuous multi-compartment method is adopted, and the liquid medium and the double-mass spheres are connected. The hybrid formed by the body is divided into multiple continuous chambers on the mandrel by O-rings. Each chamber independently completes the vibration absorption function to avoid resonance or mutual reduction of vibration absorption functions due to disordered state. The number of chambers can be increased or decreased according to the length of the mandrel. The V-shaped surface of the isolation unit mandrel is made into a large corrugated sawtooth shape to increase the vibration absorption area of ​​the mandrel. The vibration wave transmitted by the liquid medium is continuously absorbed, reflected and attenuated by the sawtooth. The workpiece is positioned based on the top holes at both ends. When the workpiece is long, the distance between the two tops is large. There are only O-rings and liquid medium mixtures during the period, and the overall rigidity Slightly insufficient, after the workpiece is positioned, the liquid metal is poured into the gap between the mandrel and the workpiece through the built-in flow channel. Since the liquid metal has good fluidity and a low melting point (80°), the positioning of the workpiece is not affected after pouring. After solidification, the mandrel and the workpiece are combined into a whole, ensuring the stability of the process system. After the processing is completed, the low-temperature alloy can be welded and separated in a hot water environment without residue. The present invention uses the principle that spheres of different densities can float freely in a liquid medium. Under the centrifugal force generated by the rotation of the workpiece, the spheres form a body that can absorb vibration energy. layer and fit to the inner surface of the workpiece. The high-density sphere mainly absorbs vibration impact energy, and the low-density sphere mainly utilizes the large density difference between itself and the liquid medium to efficiently transfer its own vibration displacement to the liquid medium in the form of displacement. The mixture formed by the liquid medium and the double-mass sphere is divided into multiple continuous cabins on the core shaft by O-rings. Each cabin independently completes the vibration absorption function to avoid resonance due to disorder or mutual reduction of vibration absorption function. The number of cabins can be increased or decreased according to the length of the core shaft, which solves the problem of vibration caused by precision machining of hollow thin-walled slender shafts.

[0014] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vibration reduction process based on a combination of a liquid medium and a double-mass sphere, characterized in that: The following steps are involved: Step 1: Using the principle that spheres can float freely in liquid media, two spheres of different densities are placed in the liquid medium. Under the centrifugal force generated by the rotation of the workpiece, the spheres adhere to the inner surface of the workpiece to form a layer that can absorb vibration energy, and transmit the vibration energy of the workpiece to the liquid medium and the machine tool system; Step 2: The high-density sphere mainly absorbs vibration impact energy, while the low-density sphere mainly utilizes the large density difference between itself and the liquid medium to efficiently transfer its own vibration displacement to the liquid medium by displacing the liquid volume (displacement); Step 3: Using the continuous multi-compartment method, the mixture formed by the liquid medium and the double-mass sphere is divided into multiple continuous chambers on the core shaft by O-rings. Each chamber independently completes the vibration absorption function to avoid resonance due to disorder or mutual reduction of vibration absorption function. The number of chambers can be increased or decreased according to the length of the core shaft; Step 4: The V-shaped surface of the core shaft of the isolation unit is made into a sawtooth shape with large corrugations to increase the vibration absorption area of ​​the core shaft. The vibration waves transmitted by the liquid medium are continuously absorbed, reflected and attenuated by the sawtooth; Step 5: The workpieces are positioned based on the center holes at both ends. When the workpiece is long, the distance between the two centers is large. There are only O-rings and liquid medium mixtures in between, and the overall rigidity is slightly insufficient. After the workpiece is positioned, the liquid metal is poured into the gap between the mandrel and the workpiece through the built-in flow channel. Since the liquid metal has good fluidity and a low melting point (80°), the pouring does not affect the positioning of the workpiece. After solidification, the mandrel and the workpiece are combined into a whole, ensuring the stability of the process system. After processing, the low-temperature alloy can be welded and separated in a hot water environment without residue.

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