Low noise axial fan machining method and system

Abstract

This application relates to a low-noise axial flow fan processing method and system. The material to be processed generates heat during the cutting and milling process, so the stiffness data of the material to be processed is determined to avoid deformation caused by high temperatures during cutting. Specifically, by selecting different milling cutters, the temperature rise rate between the milling cutter and the material to be processed can be reduced, thereby reducing the impact of high temperatures on the deformation of the cutting material. In the surface machining process, there can be face milling, vertical milling, and curve milling steps. Controlling the milling cutter's rotational speed and feed rate in the face milling step can reduce the impact of vibration stress. Controlling the axial cutting depth of each cut in the vertical milling step can reduce the impact of vibration stress. Controlling the axial and radial cutting depths of each cut in the curve milling step can reduce the impact of vibration stress.

Description

Technical Field

[0001] This application relates to the technical field of low-noise axial flow fan processing methods and systems, and in particular to a low-noise axial flow fan processing method and system. Background Technology

[0002] Axial flow fans are frequently used in applications involving air turbulence, such as tunnel ventilation. Their strong air turbulence control is attributed to their large size and high-speed rotation of the shaft. However, as the size of the axial flow fan increases, the required machining accuracy also increases. At high speeds, lower machining accuracy results in higher noise levels during operation. In the machining process of low-noise axial flow fans, the contact surface between the machining tool and the material being cut vibrates due to the need to process numerous curved surfaces. This vibration generates high temperatures, which can cause deformation of the material, and also creates vibrational stress that further deforms the material being cut. Therefore, it is necessary to address the low machining accuracy of traditional axial flow fan machining methods by proposing a low-noise axial flow fan machining method and system. Summary of the Invention

[0003] Therefore, it is necessary to propose a low-noise axial flow fan processing method and system to address the shortcomings of low processing accuracy in traditional axial flow fan processing methods.

[0004] This application provides a method for processing a low-noise axial flow fan, including:

[0005] Call the stiffness data of the material to be processed;

[0006] Match the milling cutter so that the stiffness of the milling cutter and the stiffness of the material to be machined meet the matching degree threshold;

[0007] Analyze the machining process and determine at least one milling step;

[0008] Select a milling step;

[0009] Determine whether the milling step is a face milling step;

[0010] If the milling step is a face milling step, then adjust the milling cutter's rotation speed and feed rate;

[0011] If the milling step is not a face milling step, then determine whether the milling step is a vertical milling step;

[0012] If the milling step is a vertical milling step, then adjust the axial cutting depth of the milling cutter for each feed.

[0013] If the milling step is not a vertical milling step, then determine whether the milling step is a curve milling step;

[0014] If the milling step is a curve milling step, then adjust the axial and radial cutting depths of the milling cutter for each feed.

[0015] Return to the previous step and select a milling step until all milling steps have been selected;

[0016] Based on the output vibration of each milling step, the vibration damper is adjusted to achieve a low-noise axial flow fan machining program.

[0017] This application provides a low-noise axial flow fan processing system, including:

[0018] The host computer is used to execute the aforementioned low-noise axial flow fan processing method;

[0019] The machining center is communicatively connected to the host computer.

[0020] A vibration sensor is connected to the host computer for communication.

[0021] A vibration damper is installed on the bottom surface of the machining center, and the vibration damper is communicatively connected to the host computer.

[0022] This application relates to a low-noise axial flow fan processing method and system. By accessing the stiffness data of the material to be processed, the deformation threshold at the recrystallization temperature of the material itself is determined. Since the material to be processed generates heat during the cutting and milling process, determining the stiffness data of the material to be processed can avoid deformation of the material being cut due to high temperatures. Specifically, by selecting different milling cutters, the rate of temperature rise between the milling cutter and the material to be processed can be reduced, thereby reducing the impact of high temperatures on the deformation of the cutting material. In the surface machining process, there can be face milling, vertical milling, and curve milling steps. In the face milling step, controlling the milling cutter's rotational speed and feed rate can reduce the impact of vibration stress. In the vertical milling step, controlling the axial cutting depth of the milling cutter for each feed can reduce the impact of vibration stress. In the curve milling step, controlling the axial and radial cutting depths of the milling cutter for each feed can reduce the impact of vibration stress. Attached Figure Description

[0023] Figure 1 This is a flowchart illustrating a low-noise axial flow fan processing method according to an embodiment of this application.

[0024] Figure 2 This is a structural connection diagram of a low-noise axial flow fan processing system provided in one embodiment of this application.

[0025] Figure label:

[0026] 100 - Host computer; 200 - Machining center; 300 - Vibration sensor; 400 - Vibration damper. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0028] This application provides a method for processing a low-noise axial flow fan.

[0029] like Figure 1 As shown in one embodiment of this application, a low-noise axial flow fan processing method includes:

[0030] S100, retrieves the stiffness data of the material to be processed.

[0031] Specifically, as temperature increases, the activity of molecules or atoms in a material increases, causing the material to expand in volume. Conversely, at low temperatures, the activity of molecules or atoms decreases, causing the material to contract. This phenomenon of thermal expansion or contraction is common in metallic materials.

[0032] The expansion or contraction of metallic materials at different temperatures will affect the deformation threshold of the metallic materials.

[0033] Understandably, for most metallic materials, the strength and hardness of the metal usually decrease at high temperatures, which makes the material more prone to deformation when subjected to stress.

[0034] Therefore, calling the stiffness data of the material to be processed based on temperature parameters can be used to prevent the material to be cut from deforming due to high temperature.

[0035] On the other hand, the strength and hardness of metals decrease at high temperatures. By selecting a milling cutter with appropriate stiffness and applying a suitable milling cutter speed, vibration stress can be reduced and deformation of the material to be processed can be minimized.

[0036] Simply put, the application of stiffness data of the material to be processed based on temperature parameters can be used to prevent high-temperature deformation of the material to be processed, and can also be used to reduce the strength and hardness of the material to be processed, thereby reducing vibration stress.

[0037] S200, Matching the milling cutter to ensure that the stiffness of the milling cutter and the stiffness of the material to be machined meet the matching threshold.

[0038] Specifically, milling cutter stiffness refers to the ability of a milling cutter to resist deformation when subjected to external forces. High-stiffness milling cutters deform less, while low-stiffness milling cutters are prone to bending or deformation.

[0039] In fact, when the material to be processed performs well in a high-temperature environment, that is, the material to be processed has less deformation but a greater reduction in strength and hardness in a high-temperature environment, it is suitable to match a high-rigidity milling cutter, which can also be adapted to a higher milling cutter speed.

[0040] When the material to be machined performs poorly at high temperatures—that is, the material exhibits significant deformation at high temperatures while its strength and hardness decrease only slightly—a low-stiffness milling cutter is suitable, allowing for a lower milling speed. The deformation of the low-stiffness milling cutter couples with the deformation stress in the material being machined. Furthermore, the lower milling speed results in lower heat generation, further reducing the deformation of the material. This improves the machining accuracy of the material.

[0041] S300, analyze the machining process and determine at least one milling step.

[0042] Specifically, milling steps include face milling, vertical milling, curve milling, and other milling machining methods.

[0043] S400, Select a milling step.

[0044] S500 determines whether the milling step is a face milling step.

[0045] S610, if the milling step is a face milling step, then adjust the milling cutter's rotational speed and feed rate.

[0046] S620, if the milling step is not a face milling step, then determine whether the milling step is a vertical milling step.

[0047] S630, if the milling step is a vertical milling step, then adjust the axial cutting depth of the milling cutter for each feed.

[0048] S640, if the milling step is not a vertical milling step, then determine whether the milling step is a curve milling step.

[0049] S650, if the milling step is a curve milling step, then adjust the axial cutting depth and radial cutting depth of the milling cutter for each feed.

[0050] S700, return to the step of selecting a milling step, until all milling steps have been selected.

[0051] The S800 adjusts the vibration damper based on the output vibration of each milling step to achieve a low-noise axial flow fan machining program.

[0052] Specifically, dampers in machining centers absorb vibration energy through the damping effect, thereby improving the machining quality of CNC machine tools or mechanical devices and extending tool life. Simply put, dampers effectively suppress vibration, improving machining accuracy and product quality.

[0053] This embodiment relates to a low-noise axial flow fan machining method. By calling the stiffness data of the material to be machined, the deformation threshold at the recrystallization temperature of the material itself is determined. Since the material to be machined generates heat during the cutting and milling process, determining the stiffness data of the material to be machined can avoid deformation of the material being cut due to high temperatures. Specifically, by selecting different milling cutters, the rate of temperature rise between the milling cutter and the material to be machined during the milling process can be reduced, thereby reducing the impact of high temperatures on the deformation of the cutting material. In the surface machining process, there can be face milling, vertical milling, and curve milling steps. In the face milling step, controlling the milling cutter's rotational speed and feed rate can reduce the impact of vibration stress. In the vertical milling step, controlling the axial cutting depth of the milling cutter for each feed can reduce the impact of vibration stress. In the curve milling step, controlling the axial and radial cutting depths of the milling cutter for each feed can reduce the impact of vibration stress.

[0054] In one embodiment of this application, before S100, the following steps are included:

[0055] S111, receiving the recrystallization temperature of the material to be processed.

[0056] Specifically, for most metallic materials, the strength limit of metallic materials and the change with temperature can be roughly divided into three stages.

[0057] The first stage is the initial stage. In the initial stage, the temperature is low, and the strength limit of metallic materials decreases significantly as the temperature increases.

[0058] The second stage is the intermediate stage, in which the strength limit of metallic materials slowly decreases as the temperature increases.

[0059] The third stage is the high-temperature stage, during which the strength limit of metallic materials decreases sharply as the temperature increases.

[0060] These three stages correspond to the processes of transgranular fracture to intergranular fracture in metallic materials, respectively.

[0061] When the material to be processed performs well in a high-temperature environment, the high-temperature stage of the material to be processed can be selected as the processing temperature threshold.

[0062] When the material to be processed does not perform well in a high-temperature environment, the intermediate stage of the material to be processed can be selected as the processing temperature threshold.

[0063] The processing temperature threshold is the recrystallization temperature of the material to be processed as defined in S112.

[0064] S112, Determine the deformation threshold of the material to be processed based on the recrystallization temperature of the material to be processed.

[0065] Specifically, even at the recrystallization temperature of the material to be processed, the metallic material will still exhibit creep.

[0066] The first stage of creep in metallic materials is unavoidable.

[0067] The second stage of creep in metallic materials is relatively mild.

[0068] When the material to be processed performs well in a high-temperature environment, the milling cutter speed can be selected according to the first stage creep time of the metal material to complete the milling step with small deformation.

[0069] When the material to be processed does not perform well in a high-temperature environment, the milling cutter speed can be selected during the first and second stages of creep in the metal material to complete the milling step with small deformation.

[0070] S113, using the deformation threshold of the material to be processed to determine the stiffness of the material to be processed.

[0071] Specifically, based on the relationship between temperature and creep rate of metallic materials, the deformation threshold of the material to be processed can be determined, and thus the stiffness of the material to be processed can be determined.

[0072] This embodiment relates to determining the stiffness of the material to be processed. During the creep process of metallic materials, the first stage creep and the second stage creep of the metallic materials will generate subgrains. Controlling the temperature after material processing, i.e., heat treatment of the material to be processed, can effectively reduce the subgrain spin.

[0073] In one embodiment of this application, S100 includes:

[0074] S121, based on the stiffness of the material to be processed, select a rotational speed range.

[0075] Specifically, the rotational speed range of the milling cutter can be determined based on the creep time of the material to be processed.

[0076] S122, select a speed within the speed range.

[0077] S123, determine the temperature of the milling cutter at this rotational speed and the static displacement working state of the material to be processed.

[0078] Specifically, friction occurs due to the rotational motion between the milling cutter material and the workpiece. This friction causes the temperature at the friction interface to rise, a phenomenon known as friction heating.

[0079] Therefore, it is necessary to determine the temperature under static displacement working conditions in order to match the temperature under static displacement working conditions with the creep temperature of the material to be processed.

[0080] S124, based on the temperature under static displacement working conditions, determines the deformation value of the material to be processed.

[0081] Specifically, when the temperature under static displacement working conditions is matched with the creep temperature of the material to be processed, the deformation value of the material to be processed can be determined quickly and effectively.

[0082] S125, return to one speed within the selected speed range, until all speeds have been selected.

[0083] Specifically, all the rotational speeds in this embodiment are actually based on the creep time of the material to be processed, which can determine the rotational speed range of the milling cutter.

[0084] For example, if the creep time of the material to be processed is 5 minutes, then a time period of 3 to 5 minutes can be selected, with an interval of 10 seconds as one creep time for the material to be processed. Such as 3 minutes, 3 minutes and 10 seconds, 3 minutes and 20 seconds, 3 minutes and 30 seconds, etc.

[0085] If the creep time of the material to be processed is selected as 3 minutes, then the number of milling cutter revolutions required to complete the milling step is 10,000 revolutions, and the rotation speed of the milling cutter is one-third of 10,000 revolutions per minute.

[0086] If the creep time of the material to be processed is selected as 5 minutes, then the number of milling cutter revolutions required to complete the milling step is 10,000, and the rotation speed of the milling cutter is 2,000 revolutions per minute.

[0087] All the speeds mentioned are discrete values ​​ranging from two thousand revolutions per minute to one-third ten thousand revolutions per minute.

[0088] S126, return to the selected milling cutter's rotational speed range until all milling cutters have been selected.

[0089] In one embodiment of this application, S200 includes:

[0090] S211, select a temperature.

[0091] Specifically, the temperature is the temperature of the milling cutter under static displacement working conditions with the material to be processed at that rotational speed.

[0092] S212, determine whether the temperature is less than or equal to the recrystallization temperature of the material to be processed.

[0093] S213, if the temperature is higher than the recrystallization temperature of the material to be processed, return to the step of selecting a temperature, until all temperatures have been selected.

[0094] S214, if the temperature is less than or equal to the recrystallization temperature of the material to be processed, then add the milling cutter corresponding to the temperature to the selectable milling cutter folder, and return to the step of selecting a temperature until all temperatures have been selected.

[0095] Specifically, friction occurs due to the rotational motion between the milling cutter material and the workpiece. This friction causes the temperature at the friction interface to rise, a phenomenon known as friction heating.

[0096] Therefore, it is necessary to determine the temperature under static displacement working conditions in order to match the temperature under static displacement working conditions with the creep temperature of the material to be processed.

[0097] The higher the temperature, the more pronounced the creep phenomenon of the material being processed; simply put, the higher the temperature, the more significant the deformation of the material. Therefore, keeping the temperature below or equal to the recrystallization temperature of the material can greatly reduce the deformation caused by temperature.

[0098] More specifically, the temperature selected in this embodiment is actually the temperature of the workpiece and the milling cutter under static displacement working conditions at the selected rotation speed.

[0099] In one embodiment of this application, S200 further includes:

[0100] S221, Select a milling cutter from the candidate milling cutter folder.

[0101] S222, determine the rotational speed of the milling cutter.

[0102] S223, based on the selected milling cutter and its rotational speed, determines the deformation value of the material to be processed.

[0103] S224, return to the selection folder of milling cutters and select one milling cutter until all milling cutters in the selection folder have been selected.

[0104] S225 selects the milling cutter and its rotational speed that minimizes the deformation value of the material to be machined.

[0105] Specifically, through S211 to S214, the three-dimensional relationship between the type of milling cutter, the rotational speed of the milling cutter, and the deformation value of the material to be processed can be determined.

[0106] Based on the three-dimensional relationship, the actual working configuration of the milling cutter and the milling cutter speed can be selected when the deformation value of the material to be processed is at its lowest.

[0107] By selecting the appropriate milling cutter and its rotational speed, the machining accuracy of low-noise axial flow fans can be greatly improved.

[0108] In one embodiment of this application, S610 includes:

[0109] S611, determine the initial contact point between the milling cutter and the material to be machined in the face milling step.

[0110] S612, adjusts the angle of entry of the milling cutter at the initial contact point with respect to the plane of the material to be machined.

[0111] S613 selects the rotational speed of a milling cutter.

[0112] S614 selects a feed rate for a milling cutter.

[0113] S615 receives the first vibration parameters from the vibration sensor.

[0114] S616, return to the step of selecting a milling cutter speed, until all speeds have been selected.

[0115] S617, return to the step of selecting a feed rate for a milling cutter, until the feed rates for all milling cutters have been selected.

[0116] S618 selects the milling cutter's rotational speed and feed rate under the optimal first vibration parameters.

[0117] Specifically, face milling cutters are mainly used for milling large-area planes and machining relatively flat three-dimensional contours using multiple axes. They are characterized by high milling speed, high machining efficiency, and good surface finish.

[0118] In face milling, the feed rate of the milling cutter is a key factor affecting machining accuracy. In fact, the feed rate of the milling cutter affects the vibration stress between the milling cutter and the workpiece.

[0119] Under the same working conditions of milling cutter, milling cutter speed, and workpiece, the faster the feed rate of the milling cutter, the greater the vibration stress.

[0120] Similarly, under the same milling cutter feed rate, the same milling cutter speed, and the same working conditions of the material to be machined, the greater the hardness of the milling cutter, the greater the vibration stress.

[0121] Under the same milling cutter feed rate, the same milling cutter, and the same workpiece, the higher the milling cutter speed, the greater the vibration stress.

[0122] By comprehensively analyzing the milling cutter hardness, milling cutter speed, and milling cutter feed rate, it is possible to ensure machining accuracy while maintaining high machining speed.

[0123] In one embodiment of this application, S630 includes:

[0124] S631, select a unit axial cutting depth.

[0125] Specifically, the unit axial cutting depth is the axial cutting depth of each feed of the milling cutter.

[0126] S632 calls up the milling cutter's rotational speed and feed rate under the optimal vibration parameters.

[0127] S633, execute the vertical milling step.

[0128] S634 receives the second vibration parameter from the vibration sensor.

[0129] S635, return to the step of selecting a unit axial cutting depth until all unit axial cutting depths have been selected.

[0130] S636: Select the unit axial cutting depth under the optimal second vibration parameter to determine the axial cutting depth of the milling cutter for each feed.

[0131] Specifically, end mills are the most frequently used type of milling cutter on machining centers. Their structure includes a cylindrical surface and cutting edges on the end face, which can perform cutting simultaneously or individually.

[0132] More specifically, based on S611 to S618, a more suitable end mill hardness, a more suitable end mill speed, and a more suitable end mill feed rate can be determined.

[0133] The optimal depth of cut per unit axial direction for machining efficiency can be determined using the second vibration parameter from the vibration sensor.

[0134] In one embodiment of this application, S650 includes:

[0135] S651, select a unit radial cutting depth.

[0136] Specifically, the unit radial cutting depth is the radial cutting depth of each feed of the milling cutter.

[0137] S652 calls up the milling cutter's rotational speed, feed rate, and depth of cut per unit axial direction under the optimal vibration parameters.

[0138] S653, execute the curve milling step.

[0139] S654 receives the third vibration parameter from the vibration sensor.

[0140] S655, return to the step of selecting a unit radial cutting depth until all unit radial cutting depths have been selected.

[0141] S656, select the unit axial cutting depth under the optimal third vibration parameter, and determine the radial cutting depth of the milling cutter for each feed.

[0142] Specifically, curve milling cutters are suitable for machining curved workpieces and can be used to mill arc-shaped, elliptical, and other similar workpieces.

[0143] Curve milling is essentially a milling step in three-dimensional spatial coordinates. By decomposing the motion trajectory of this step, it can be simplified into a process in which vertical milling and face milling are performed simultaneously.

[0144] In one embodiment of this application, S800 includes:

[0145] S810 receives vibration parameters from the vibration sensor.

[0146] Specifically, the vibration parameters include one or more of the first vibration parameter, the second vibration parameter, and the third vibration parameter.

[0147] S820 analyzes the vector direction of the vibration force and the corresponding value of the vibration force in the vibration parameters.

[0148] The S830 outputs damping parameters for adjusting vibration based on the vector direction of the vibration force and the corresponding vibration force value.

[0149] Specifically, based on the vibration parameters from the vibration sensor, the vibration is decomposed into three orthogonal vector vibrations in three-dimensional spatial coordinates. Using the data from these three orthogonal vector vibrations, the damper receives damping parameters from the host computer to adjust the vibration, and the damper then regulates the vibration.

[0150] This application provides a low-noise axial flow fan processing system.

[0151] like Figure 2 As shown in one embodiment of this application, a low-noise axial flow fan processing system includes a host computer 100, a machining center 200, a vibration sensor 300, and a vibration damper 400.

[0152] The host computer 100 is used to execute the aforementioned low-noise axial flow fan processing method.

[0153] The machining center 200 is communicatively connected to the host computer 100.

[0154] The vibration sensor 300 is communicatively connected to the host computer 100.

[0155] The vibration damper 400 is disposed on the bottom surface of the machining center 200, and the vibration damper 400 is communicatively connected to the host computer 100.

[0156] This embodiment relates to a low-noise axial flow fan machining system. The host computer 100 determines the deformation threshold at the recrystallization temperature of the material to be machined by calling the stiffness data of the material. Since the material generates heat during cutting and milling, determining the stiffness data of the material can avoid deformation caused by high temperatures. Specifically, the machining center 200 calls the milling cutter based on the instructions of the host computer 100. By selecting different milling cutters, the host computer 100 can reduce the temperature rise rate between the milling cutter and the material, thereby reducing the impact of high temperatures on the deformation of the cutting material. In the surface machining process, there can be face milling, vertical milling, and curve milling steps. Controlling the milling cutter's rotational speed and feed rate in the face milling step can reduce the impact of vibration stress. Controlling the axial cutting depth of the milling cutter in each feed in the vertical milling step can reduce the impact of vibration stress. The vibration sensor 300 can detect vibration stress, and controlling the axial and radial cutting depths of the milling cutter in each feed in the curve milling step can further reduce the impact of vibration stress. Vibration damper 400 can reduce the effects of vibration stress.

[0157] The technical features of the above embodiments can be combined arbitrarily, and the execution order of the method steps is not restricted. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0158] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for processing a low-noise axial flow fan, characterized in that, include: The recrystallization temperature of the material to be processed; The deformation threshold of the material to be processed is determined based on its recrystallization temperature. The stiffness of the material to be processed is determined by using its deformation threshold. Call the stiffness data of the material to be processed; Based on the stiffness of the material to be processed, select a rotational speed range. Select a speed within the speed range; Determine the temperature of the milling cutter under static displacement working conditions relative to the workpiece at that rotational speed; Determine the deformation value of the material to be processed based on the temperature under static displacement working conditions; Return to one speed within the selected speed range until all speeds have been selected; Return to the previous step of selecting a milling cutter within a certain rotational speed range, until all milling cutters have been selected; Matching milling cutters, including: Select a temperature; the temperature is the temperature of the milling cutter under the static displacement working state of the material to be processed at that rotational speed. Determine whether the temperature is less than or equal to the recrystallization temperature of the material to be processed; If the temperature is higher than the recrystallization temperature of the material to be processed, return to the step of selecting a temperature, until all temperatures have been selected; If the temperature is less than or equal to the recrystallization temperature of the material to be processed, then add the milling cutter corresponding to that temperature to the selectable milling cutter folder, and return to the previous step of selecting a temperature, until all temperatures have been selected; Select a milling cutter from the folder of available milling cutters; Determine the rotational speed of the milling cutter; Based on the selected milling cutter and its rotational speed, the deformation value of the material to be processed is determined; Return to the folder of selected milling cutters and select one milling cutter, until all milling cutters in the folder have been selected; Select the milling cutter and the milling cutter speed that minimize the deformation value of the material to be processed, so that the stiffness of the milling cutter and the stiffness of the material to be processed meet the matching degree threshold. Analyze the machining process and determine at least one milling step; Select a milling step; Determine whether the milling step is a face milling step; If the milling step is a face milling step, then adjust the milling cutter's rotation speed and feed rate; If the milling step is not a face milling step, then determine whether the milling step is a vertical milling step; If the milling step is a vertical milling step, then adjust the axial cutting depth of the milling cutter for each feed. If the milling step is not a vertical milling step, then determine whether the milling step is a curve milling step; If the milling step is a curve milling step, then adjust the axial and radial cutting depths of the milling cutter for each feed. Return to the previous step and select a milling step until all milling steps have been selected; Based on the output vibration of each milling step, the vibration damper is adjusted to achieve a low-noise axial flow fan machining program.

2. The low-noise axial flow fan processing method according to claim 1, characterized in that, If the milling step is a face milling step, then adjusting the milling cutter's rotational speed and feed rate includes: Determine the initial contact point between the milling cutter and the material to be machined in the face milling step; Adjust the angle of entry of the milling cutter at the initial contact point with respect to the plane of the material to be machined; Select the rotational speed of the milling cutter; Select a feed rate for the milling cutter; Receive the first vibration parameters from the vibration sensor; Return to the step of selecting a milling cutter speed, until all speeds have been selected; Return to the previous step and select a feed rate for a milling cutter until all milling cutter feed rates have been selected; Select the milling cutter's rotational speed and feed rate under the optimal first vibration parameters.

3. The low-noise axial flow fan processing method according to claim 2, characterized in that, If the milling step is a vertical milling step, then adjusting the axial cutting depth of the milling cutter for each feed includes: Select a unit axial cutting depth; the unit axial cutting depth is the axial cutting depth of each feed of the milling cutter; Select the milling cutter's rotational speed and feed rate under the optimal vibration parameters; Perform the vertical milling step; Receive the second vibration parameter from the vibration sensor; Return to the previous step and select a unit axial cutting depth until all unit axial cutting depths have been selected; By selecting the optimal second vibration parameter for the unit axial cutting depth, the axial cutting depth of each feed of the milling cutter is determined.

4. The low-noise axial flow fan processing method according to claim 3, characterized in that, If the milling step is a curve milling step, then adjusting the axial and radial cutting depths of the milling cutter for each feed includes: Select a unit radial cutting depth; the unit radial cutting depth is the radial cutting depth of each feed of the milling cutter; The optimal vibration parameters are selected for the milling cutter's rotational speed, feed rate, and depth of cut per unit axial direction. Perform the curve milling step; Receive the third vibration parameter from the vibration sensor; Return to the previous step and select a unit radial cutting depth until all unit radial cutting depths have been selected; By selecting the optimal unit axial cutting depth under the third vibration parameter, the radial cutting depth of each feed of the milling cutter is determined.

5. The low-noise axial flow fan processing method according to claim 4, characterized in that, The process for machining a low-noise axial flow fan, which adjusts the vibration damper based on the output vibration of each milling step, includes: The vibration parameters are received from the vibration sensor; the vibration parameters include one or more of a first vibration parameter, a second vibration parameter, and a third vibration parameter. Analyze the vector direction of the vibration force and the corresponding value of the vibration force in the vibration parameters; Based on the vector direction of the vibration force and the corresponding vibration force value, the damping parameters for adjusting the vibration are output.

6. A low-noise axial flow fan processing system, characterized in that, include: The host computer is used to execute the low-noise axial flow fan processing method as described in any one of claims 1 to 5; The machining center is communicatively connected to the host computer. A vibration sensor is connected to the host computer for communication. A vibration damper is installed on the bottom surface of the machining center, and the vibration damper is communicatively connected to the host computer.

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