Main shaft device, machine tool and vibration control method

Abstract

The invention provides a main shaft device, a machine tool and a vibration control method, the main shaft device comprises a shell, a positioning part, a driving part, a vibration sensor and a controller, the positioning part comprises a positioning sleeve, the positioning sleeve is detachably connected with the shell, the driving part comprises a shaft core, and the shaft core penetrates through the positioning sleeve. A mounting hole is formed in the positioning sleeve, and a vibration sensor is arranged in the mounting hole and used for sensing vibration signals of the shaft core. And according to the vibration signal, the controller controls the motion states such as shutdown, rotating speed, feeding speed or feeding amount of the driving part. The vibration of the shaft core is detected through the vibration sensor to judge whether the vibration of the shaft core is normal or not, so that an operator can adjust the movement of the driving part according to the vibration state of the shaft core, and workpiece machining under the abnormal vibration state of the shaft core is avoided.

Description

Technical Field

[0001] This invention relates to the field of machine tool spindles, and more specifically, to a spindle device, a machine tool, and a vibration control method. Background Technology

[0002] In the field of machine tool processing, the spindle is one of the core components of a machine tool. Its performance directly affects the machining accuracy, efficiency, and stability of the machine tool, and plays a decisive role in the overall machining quality.

[0003] Traditional machine tool spindles often experience vibration during operation due to a combination of factors, such as spindle vibrations caused by cutting tools, unstable spindle dynamic balance, and excessively hard workpiece materials. Spindle vibration not only degrades the surface quality of machined workpieces, reducing product yield, but also accelerates wear on the spindle and related components, shortens equipment lifespan, increases maintenance costs and downtime, and ultimately impacts production efficiency. Existing machine tool spindle vibration monitoring and control methods have many shortcomings. Some spindles lack effective vibration monitoring methods, making it difficult for operators to accurately and in real-time grasp the spindle's vibration status and promptly detect potential vibration problems.

[0004] Therefore, how to grasp the spindle vibration state and control the spindle vibration is a technical problem that needs to be further solved by those skilled in the art. Summary of the Invention

[0005] To address the aforementioned problems, the present invention aims to provide a spindle device, a machine tool, and a vibration control method.

[0006] The objective of this invention is achieved through the following technical solution: The present invention provides a spindle device comprising: case; The positioning component includes a positioning sleeve, which is detachably disposed at one end of the housing and has mounting holes. A drive component is disposed within a housing. The drive component includes a shaft that passes through a positioning sleeve and extends from the end of the positioning sleeve away from the housing. A vibration sensor, installed in the mounting hole, is used to sense the vibration signal of the shaft core. The vibration signal includes at least the vibration amplitude and the vibration frequency. The controller, connected to the vibration sensor and the drive component, is used to control the motion state of the drive component according to the vibration signal. The motion state of the drive component includes shutting down the drive component and adjusting the motion parameters of the drive component. The motion parameters include at least one of the drive component's rotational speed, feed rate, and feed amount.

[0007] Furthermore, the mounting hole is provided on the wall of the positioning component along the axial direction of the positioning component, and the housing is provided with a first wiring channel communicating with the mounting hole. The first wiring channel is used to arrange the connection line between the controller and the vibration sensor.

[0008] Furthermore, the housing also includes an end cap, which is located at the end of the housing away from the positioning sleeve. The end face of the end cap extends toward the positioning sleeve and is provided with a second wiring channel for wiring, which is connected to the first wiring channel.

[0009] Furthermore, a positioning structure for positioning the vibration sensor is provided in the mounting hole. The positioning structure includes a positioning cylinder, one end of which abuts against the housing, and the other end of which abuts against the vibration sensor. The vibration sensor is positioned between the positioning cylinder and the bottom surface of the mounting hole. A third wiring channel is provided inside the positioning cylinder, and the third wiring channel is connected to the first wiring channel.

[0010] Furthermore, the positioning structure also includes a positioning cylinder, which is detachably installed in the mounting hole, and a vibration sensor is installed inside the positioning cylinder.

[0011] Furthermore, the positioning components also include a bearing and a bearing housing, with the bearing sleeved on the shaft core, the bearing housing sleeved on the bearing, and the positioning sleeve sleeved on the bearing housing.

[0012] A second aspect of the present invention provides a machine tool, including a base, a worktable, a column, and a spindle device of any one of the above. The worktable and the column are disposed on the base, and the spindle device is disposed on the column. The output end of the spindle device is used to hold a cutting tool.

[0013] A third aspect of this invention provides a vibration control method for a spindle device, applicable to any of the aforementioned spindle devices or machine tools, the method comprising the following steps: Vibration sensing signals are acquired in real time through vibration sensors, and the vibration sensing signals include at least the real-time vibration amplitude or the real-time vibration frequency. The real-time vibration amplitude is compared with the preset amplitude threshold, or the real-time vibration frequency is compared with the preset frequency threshold. If the real-time vibration amplitude is greater than or equal to the vibration threshold or the real-time vibration frequency is greater than or equal to the frequency threshold, the first control command is generated. Based on the first control command, the shaft of the control drive component is stopped.

[0014] Furthermore, before stopping the movement of the shaft of the drive component based on the first control command, the following is also included: The real-time vibration amplitude is compared with a preset amplitude threshold, or the real-time vibration frequency is compared with a preset frequency threshold. If the real-time vibration amplitude is greater than or equal to a first predetermined proportion of the vibration threshold or the real-time vibration frequency is greater than or equal to a first predetermined proportion of the frequency threshold, a second control command is generated, wherein the first predetermined proportion is less than 1. According to the second control command, the motion parameters of the drive component are reduced, including the rotational speed and / or feed rate and / or feed amount of the drive component.

[0015] Furthermore, before stopping the movement of the shaft of the drive component based on the first control command, the following is also included: The real-time vibration amplitude is compared with a preset amplitude threshold, or the real-time vibration frequency is compared with a preset frequency threshold. If the real-time vibration amplitude is greater than or equal to a second predetermined proportion of the vibration threshold or the real-time vibration frequency is greater than or equal to a second predetermined proportion of the frequency threshold, a third control command is generated, wherein the second predetermined proportion is less than 1 and greater than the first predetermined proportion. According to the third control command, the motion parameters of the drive component are reduced. The motion parameters include the rotational speed, feed rate and feed amount of the drive component.

[0016] The beneficial effects of this invention are as follows: a detachable positioning sleeve is provided at one end of the housing, a mounting hole is provided inside the positioning sleeve, and a vibration sensor is provided inside the mounting hole to sense the vibration signal of the shaft core. Based on the vibration signal, the controller controls the motion state of the drive component, such as its shutdown, rotational speed, feed rate, or feed amount. This application detects the vibration of the shaft core using a vibration sensor to determine whether the vibration of the shaft core is normal, allowing the operator to adjust the movement of the drive component according to the vibration state of the shaft core, thereby avoiding workpiece processing when the shaft core is in an abnormal vibration state. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a sectional view of the spindle assembly of the present invention; Figure 2 This is a partially enlarged view of the spindle device of the present invention; Figure 3 This is a schematic diagram of the positioning structure of the present invention; Figure 4 This is a flowchart of the vibration control method for the spindle device of the present invention.

[0018] The attached figures are labeled as follows: 10-Housing, 11-First wiring channel, 12-End cap, 121-Second wiring channel; 20-Positioning component, 21-Positioning sleeve, 211-Mounting hole, 22-Bearing, 23-Bearing housing, 24-Flange, 25-Balance disc, 26-Gland cover, 27-Dust cover, 28-Collar; 30-Drive component, 31-Shaft core, 32-Rotor, 33-Stator; 40 - Vibration sensor; 50 - Positioning structure, 51 - Positioning cylinder, 511 - Third wiring channel, 52 - Positioning cylinder. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0020] refer to Figure 1 and Figure 2 A first aspect of the present invention provides a spindle device, including a housing 10, a positioning component 20, a driving component 30, a vibration sensor 40, and a controller. The housing 10 of the spindle device is made of cylindrical metal, which has high strength and rigidity, and its interior is hollow, providing installation space for the driving component 30.

[0021] The positioning component 20 includes a positioning sleeve 21, which is detachably mounted on one end of the housing 10 via a threaded connection. The positioning sleeve 21 is provided with a mounting hole 211, which can be cylindrical to accommodate the vibration sensor 40.

[0022] The drive component 30 is disposed within the housing 10. The shaft core 31 passes through the positioning sleeve 21 and protrudes from the end of the positioning sleeve 21 away from the housing 10. The end of the shaft core 31 is designed with a chuck for gripping tools, which can firmly grip various types of tools to meet different machining needs. The drive component 30 also includes a rotor 32 and a stator 33. The stator 33 is fixedly mounted on the housing 10 body, and the rotor 32 is rotatably disposed within the stator 33. The shaft core 31 is inserted into the rotor 32 and fixedly connected to the rotor 32.

[0023] The vibration sensor 40 is a highly sensitive sensor, installed in the mounting hole 211 of the positioning sleeve 21. During the machining process, when the spindle 31 drives the tool to rotate and feed, the spindle 31 may vibrate due to various factors. The vibration sensor 40 can sense the vibration signal of the spindle 31 in real time, including the vibration amplitude and vibration frequency.

[0024] The controller can be a programmable logic controller (PLC), which is connected to the vibration sensor 40 and the drive component 30 via signal lines. During the processing, the vibration sensor 40 transmits the sensed vibration signal to the controller in real time. After receiving the vibration signal, the controller performs rapid analysis and processing.

[0025] When the controller detects that the vibration amplitude exceeds a preset safety threshold, it will immediately issue a command to shut down the drive component 30 to prevent tool damage or decreased machining accuracy due to excessive vibration, thus ensuring the safety of the machining process. Alternatively, when the controller detects a predetermined vibration amplitude value, it will adjust the motion parameters of the drive component 30 to ensure that the motion state of the drive component 30 is in a preset state or meets the machining requirements. The motion parameters include at least one of the following: the rotational speed of the drive component 30, the feed rate, and the feed amount.

[0026] When the vibration amplitude is within the normal range, but the vibration frequency changes abnormally, the controller will adjust the motion parameters of the drive component 30 according to the preset program. For example, the controller will reduce the rotational speed of the drive component 30; or, the controller will adjust the feed rate; or, the controller will adjust the feed amount accordingly, thereby optimizing the machining process and controlling the vibration frequency of the spindle device within a suitable range, thereby improving machining quality and efficiency.

[0027] In some implementations, reference Figure 1 and Figure 2 The mounting hole 211 is provided along the axial direction of the positioning component 20 on the wall surface of the positioning component 20, and is in the form of a cylindrical groove or channel. The vibration sensor 40 is securely installed in the mounting hole 211 to sense the vibration signal of the shaft core 31 in real time.

[0028] The housing 10 is provided with a first wiring channel 11 communicating with the mounting hole 211. Preferably, the first wiring channel 11 is a cylindrical channel with a diameter designed according to the thickness of the cable to be laid out, ensuring that the cable can pass through smoothly without being excessively squeezed. Preferably, the first wiring channel 11 is provided to extend through the axial direction of the housing 10 to the outside of the housing 10, which facilitates the cable arrangement between the controller and the vibration sensor 40.

[0029] In some implementations, reference Figure 1 and Figure 2 The housing 10 also includes an end cap 12, which is bolted to one end of the housing 10 away from the positioning sleeve 21. The end face of the end cap 12 extends towards the positioning sleeve 21 and is provided with a second wiring channel 121 for wiring. Preferably, the second wiring channel 121 is a cylindrical channel with a diameter matching that of the first wiring channel 11, and is precisely connected to the first wiring channel 11 to form a complete wiring path.

[0030] During wiring, the cable connecting the vibration sensor 40 and the controller can first pass through the first wiring channel 11, then enter the second wiring channel 121, and finally be led out from the end face of the end cover 12 and connected to the controller. During the processing, the vibration sensor 40 senses the vibration signal of the shaft core 31 in real time and transmits the signal to the controller through the wiring channel, and the controller analyzes and processes the signal.

[0031] In some implementations, reference Figure 1 and Figure 2 A positioning structure 50 for positioning the vibration sensor 40 is provided in the mounting hole 211. The positioning structure 50 includes a positioning cylinder 51, which is cylindrical. One end of the positioning cylinder 51 abuts against one end of the housing 10, and the other end of the positioning cylinder 51 abuts against the vibration sensor 40, thus firmly positioning the vibration sensor 40 between the positioning cylinder 51 and the bottom surface of the mounting hole 211.

[0032] The positioning cylinder 51 has a through third wiring channel 511, which is connected to the first wiring channel 11. The positioning cylinder 51 fixes the vibration sensor 40 in the mounting hole 211, and the lead wire of the vibration sensor 40 is led out from the end face of the end cover 12 through the third wiring channel 511, the first wiring channel 11 and the second wiring channel 121.

[0033] In some implementations, reference Figure 1 , Figure 2 and Figure 3 The positioning structure 50 also includes a positioning cylinder 52. The positioning cylinder 52 is detachably mounted within the mounting hole 211, and its outer diameter matches the inner diameter of the mounting hole 211. It is securely mounted in the mounting hole 211 by means of threaded connection or adhesive bonding. The vibration sensor 40 is housed within the positioning cylinder 52, which protects the vibration sensor 40. Furthermore, when assembling the vibration sensor 40, it can be first installed within the positioning cylinder 52, and then the positioning cylinder 52 can be installed into the mounting hole 211, facilitating the installation of the vibration sensor 40.

[0034] In some implementations, reference Figure 1 and Figure 2 The positioning component 20 also includes a bearing 22 and a bearing housing 23. The bearing 22 is a high-precision bearing capable of simultaneously withstanding axial and radial loads, ensuring the stability and accuracy of the shaft core 31 during high-speed rotation. The bearing 22 is fitted onto the shaft core 31. The bearing housing 23 is fitted onto the bearing 22, and its inner diameter matches the outer diameter of the bearing 22. The positioning sleeve 21 is fitted onto the bearing housing 23, and the entire positioning component 20 is mounted onto the housing 10.

[0035] Further, refer to Figure 1 and Figure 2 The positioning component 20 also includes a flange 24, a balance disc 25, a pressure cap 26, a dust cover 27, and a collar 28. The positioning sleeve 21 is connected to the housing 10, and the bearing 22 is fitted onto the shaft core 31. The bearing housing 23 is fitted between the positioning sleeve 21 and the bearing 22. The flange 24 is mounted on the bearing housing 23. The balance disc 25 is fitted onto the shaft core 31, and the balance disc 25 is located on the side of the bearing 22 away from the housing 10. The collar 28 is fixed to the flange 24. The dust cover 27 is mounted on the flange 24 and inserted between the balance disc 25 and the pressure cap 26. The output end of the shaft core 31 is sealed and positioned by the balance disc 25, the dust cover 27, and the pressure cap 26.

[0036] A second aspect of this invention provides a machine tool, including a base, a worktable, a column, and a spindle device of any one of the above. The worktable and column are disposed on the base, and the spindle device is disposed on the column. The output end of the spindle device is used to hold a cutting tool. By providing the spindle device of this application on the machine tool, the machine tool can monitor the vibration state of the spindle device at all times during the machining process. If an abnormality in the spindle vibration state is detected, the spindle device is controlled to stop machining or the machining state of the spindle device is adjusted so that the machining state of the spindle device meets the machining requirements.

[0037] refer to Figure 1 and 4 A third aspect of the present invention provides a vibration control method for a spindle device, applicable to any of the aforementioned spindle devices or machine tools, the method comprising the following steps: S100: The vibration sensor 40 acquires the vibration sensing signal in real time, and the vibration sensing signal includes at least the real-time vibration amplitude or the real-time vibration frequency. S200: Compare the real-time vibration amplitude with the preset amplitude threshold, or compare the real-time vibration frequency with the preset frequency threshold. If the real-time vibration amplitude is greater than or equal to the vibration threshold or the real-time vibration frequency is greater than or equal to the frequency threshold, then generate the first control command. S300: Based on the first control command, control the shaft core 31 of the drive component 30 to stop moving.

[0038] During CNC lathe machining, the spindle drives the cutting tool to rotate at high speed to achieve machining. The vibration control method in this embodiment monitors and controls the CNC machine tool spindle in real time. Before machining begins, amplitude and frequency thresholds are preset based on the machining accuracy requirements of the CNC machine tool and the rated parameters of the spindle. For example, for high-precision machining, the amplitude threshold is set to 0.01 mm and the frequency threshold is set to 1000 Hz. These thresholds can be flexibly adjusted according to different workpieces, cutting tools, and cutting parameters.

[0039] After the CNC machine tool starts and begins machining, the vibration sensor acquires the vibration sensing signal of the spindle device in real time and converts it into an electrical signal through internal circuitry. These electrical signals contain information such as real-time vibration amplitude and frequency, and are transmitted to the controller through wiring channels or wireless communication.

[0040] After receiving the real-time vibration signal from the vibration sensor, the controller processes and analyzes it. First, it extracts the real-time vibration amplitude and frequency from the signal. Then, it compares the real-time vibration amplitude with a preset amplitude threshold and the real-time vibration frequency with a preset frequency threshold. For example, at a certain moment, the controller detects that the real-time vibration amplitude of the spindle is 0.012 mm, which is greater than the preset amplitude threshold of 0.01 mm; or the real-time vibration frequency is 1200 Hz, which is greater than the preset frequency threshold of 1000 Hz. In this case, the controller immediately generates a first control command. After generating the first control command, the controller sends the command to the drive unit through the communication line. Upon receiving the command, the drive unit quickly cuts off the power or takes other braking measures to stop the spindle from moving.

[0041] After the spindle stops moving, the CNC lathe's control system issues an alarm signal, notifying the operator to inspect and handle the issue. The operator can check and adjust the tool, workpiece, and cutting parameters to eliminate factors causing spindle vibration. After the problem is resolved, the CNC lathe is restarted to continue machining. It should be noted that when any value of the real-time vibration amplitude or frequency is greater than or equal to its preset value, the first control command is generated.

[0042] The procedure before step S300 also includes: S400: Compare the real-time vibration amplitude with a preset amplitude threshold, or compare the real-time vibration frequency with a preset frequency threshold. If the real-time vibration amplitude is greater than or equal to a first predetermined proportion of the vibration threshold or the real-time vibration frequency is greater than or equal to a first predetermined proportion of the frequency threshold, then generate a second control command, wherein the first predetermined proportion is less than 1. S500: According to the second control command, reduce the motion parameters of the drive component 30, including the rotational speed and / or feed rate and / or feed amount of the drive component 30.

[0043] The spindle drives the cutting tool to rotate at high speed and cut the workpiece. Before machining begins, based on the machining accuracy requirements of the precision machining center and the rated parameters of the spindle, the amplitude threshold and frequency threshold are preset. At the same time, a first predetermined ratio is also set, such as 0.7. This means that when the real-time vibration amplitude reaches 70% of the amplitude threshold (i.e., 0.007 mm), or the real-time vibration frequency reaches 70% of the frequency threshold (i.e., 700 Hz), corresponding control measures will be triggered.

[0044] After the machining center starts and begins machining, the vibration sensor collects the vibration signals from the spindle in real time. This vibration sensor converts the vibration data into electrical signals, which are then transmitted to the controller via wiring. Upon receiving the real-time vibration signals from the vibration sensor, the controller immediately processes and analyzes them. First, it extracts the real-time vibration amplitude and frequency from the signal, and then compares them with preset amplitude and frequency thresholds, respectively.

[0045] For example, at a certain processing moment, the control system detects a real-time vibration amplitude of 0.008 mm, which is greater than a first predetermined proportion of the amplitude threshold, i.e., 0.008 mm is greater than 0.007 mm (amplitude threshold 0.01 × first predetermined proportion 0.7 = 0.007 mm); or the real-time vibration frequency is 800 Hz, which is greater than a first predetermined proportion of the frequency threshold, i.e., the real-time vibration frequency 800 Hz is greater than 700 Hz (frequency threshold 1000 × 0.7 = 700 Hz). At this time, the control system generates a second control command.

[0046] The control system adjusts the motion parameters of the drive component according to the generated second control command. These motion parameters include the rotational speed and / or feed rate and / or feed amount of the drive component. For example, the rotational speed of the drive component is reduced from 8000 r / min to 6000 r / min, and / or the feed rate is reduced from 500 mm / min to 300 mm / min, and / or the feed amount is reduced from 0.2 mm to 0.15 mm. By reducing these motion parameters, the cutting load on the spindle is reduced, thereby reducing the vibration amplitude. After adjusting the motion parameters, the control system continues to monitor the spindle vibration in real time. If the vibration improves, and the real-time vibration amplitude and frequency are both below the corresponding first predetermined proportional threshold, the current motion parameters are maintained for continued machining.

[0047] The procedure before step S300 also includes: Step S600: Compare the real-time vibration amplitude with a preset amplitude threshold, or compare the real-time vibration frequency with a preset frequency threshold. If the real-time vibration amplitude is greater than or equal to a second predetermined proportion of the vibration threshold or the real-time vibration frequency is greater than or equal to a second predetermined proportion of the frequency threshold, then generate a third control command, wherein the second predetermined proportion is less than 1 and greater than the first predetermined proportion. Step S700: According to the third control command, reduce the motion parameters of the drive component 30, including the rotational speed, feed rate and feed amount of the drive component 30.

[0048] For example, the preset amplitude threshold is 0.01 mm, and the frequency threshold is 1000 Hz. The first predetermined ratio is set to 0.7, and the second predetermined ratio is set to 0.8. When the real-time vibration amplitude reaches 70% of the amplitude threshold (i.e., 0.007 mm) or the real-time vibration frequency reaches 70% of the frequency threshold (i.e., 700 Hz), a first control command is generated to trigger initial control; when the real-time vibration amplitude reaches 80% of the amplitude threshold (i.e., 0.008 mm) or the real-time vibration frequency reaches 80% of the frequency threshold (i.e., 800 Hz), a third control command will be generated for a larger adjustment.

[0049] The controller adjusts the motion parameters of the drive component according to the third control command. These motion parameters include the drive component's rotational speed, feed rate, and feed depth. For example, the drive component's rotational speed is reduced from 6000 r / min to 4000 r / min, the feed rate from 400 mm / min to 250 mm / min, and the feed depth from 0.15 mm to 0.1 mm. By reducing these motion parameters, the cutting force during machining is reduced, thereby decreasing the vibration amplitude.

[0050] After adjusting the motion parameters, the vibration sensor 40 continues to monitor the vibration in real time. If the vibration is effectively controlled, and both the real-time vibration amplitude and frequency are below the corresponding second predetermined proportional threshold, the current motion parameters are maintained and processing continues. If the vibration situation does not improve, and the real-time vibration amplitude is greater than or equal to the amplitude threshold or the real-time vibration frequency is greater than or equal to the frequency threshold, the controller generates a first control command to stop the movement of the shaft core of the drive component, in order to avoid damage to the processing equipment and crankshaft workpiece due to excessive vibration. The operator then inspects and repairs the equipment, and restarts processing after eliminating the fault factors.

[0051] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A spindle arrangement, characterized by The application relates to a vibration sensor device. The vibration sensor device comprises a shell (10), a positioning component (20), a driving component (30), a vibration sensor (40) and a controller. The positioning component (20) comprises a positioning sleeve (21) which is detachably arranged at one end of the shell (10) and is provided with a mounting hole (211). The driving component (30) is arranged in the shell (10) and comprises a shaft core (31) which penetrates through the positioning sleeve (21) and is arranged to extend out of the shell (10) from the one end of the positioning sleeve (21). The vibration sensor (40) is arranged in the mounting hole (211) and is used for sensing a vibration signal of the shaft core (31), wherein the vibration signal at least comprises a vibration amplitude and a vibration frequency. The controller is connected with the vibration sensor (40) and the driving component (30) and is used for controlling a motion state of the driving component (30) according to the vibration signal, wherein the motion state of the driving component (30) comprises at least one of the following: stopping the driving component (30) and adjusting a motion parameter of the driving component (30), and the motion parameter comprises at least one of the following: a rotating speed, a feeding speed and a feeding amount of the driving component (30).

2. The spindle arrangement of claim 1, wherein, The mounting hole (211) is arranged on a wall surface of the positioning component (20) along an axial direction of the positioning component (20), the shell (10) is provided with a first wiring channel (11) which is in communication with the mounting hole (211) and is used for arranging a connecting line of the controller and the vibration sensor (40).

3. The spindle arrangement of claim 2, wherein, The shell (10) further comprises an end cover (12) which is arranged at the one end of the shell (10) away from the positioning sleeve (21), an end surface of the end cover (12) extends to the side of the positioning sleeve (21) and is provided with a second wiring channel (121) which is used for wiring and is in communication with the first wiring channel (11).

4. Spindle arrangement according to claim 2 or 3, characterized in that The mounting hole (211) is provided with a positioning structure (50) which is used for positioning the vibration sensor (40), the positioning structure (50) comprises a positioning cylinder (51), one end of the positioning cylinder (51) abuts against the shell (10), and the other end of the positioning cylinder (51) abuts against the vibration sensor (40), and the vibration sensor (40) is positioned between the positioning cylinder (51) and a bottom surface of the mounting hole (211). The positioning cylinder (51) is provided with a through third wiring channel (511) which is in communication with the first wiring channel (11).

5. The spindle arrangement of claim 4, wherein, The positioning structure (50) further comprises a positioning cylinder (52) which is detachably arranged in the mounting hole (211) and is used for arranging the vibration sensor (40) therein.

6. The spindle arrangement of claim 4, wherein, The positioning component (20) further comprises a bearing (22) and a bearing seat (23), the bearing (22) is sleeved on the shaft core (31), the bearing seat (23) is sleeved on the bearing (22), and the positioning sleeve (21) is sleeved on the bearing seat (22).

7. A machine tool, characterized by The main shaft device comprises a base, a workbench, a column and the main shaft device of any one of claims 1-6, the workbench and the column are arranged on the base, the main shaft device is arranged on the column, and an output end of the main shaft device is used for clamping a tool.

8. A vibration control method of a spindle device, characterized by, The method is applied to the main shaft device of any one of claims 1-6 or the machine tool of claim 7, and comprises the following steps: Real-time vibration sensing signals are acquired by the vibration sensor (40), and the real-time vibration sensing signals at least include real-time vibration amplitudes or real-time vibration frequencies; The real-time vibration amplitudes are compared with preset amplitude thresholds, or the real-time vibration frequencies are compared with preset frequency thresholds, if the real-time vibration amplitudes are greater than or equal to the vibration thresholds or the real-time vibration frequencies are greater than or equal to the frequency thresholds, first control instructions are generated; Based on the first control instructions, the shaft core (31) of the driving component (30) is controlled to stop moving.

9. The vibration control method of the spindle apparatus according to claim 8, wherein Before the shaft core (31) of the driving component (30) is controlled to stop moving based on the first control instructions, the method further comprises the following steps: The real-time vibration amplitudes are compared with preset amplitude thresholds, or the real-time vibration frequencies are compared with preset frequency thresholds, if the real-time vibration amplitudes are greater than or equal to a first predetermined proportion of the vibration thresholds or the real-time vibration frequencies are greater than or equal to a first predetermined proportion of the frequency thresholds, second control instructions are generated, wherein the first predetermined proportion is less than 1; According to the second control instructions, the motion parameters of the driving component (30) are reduced, the motion parameters include the rotating speed and / or the feeding speed and / or the feeding amount of the driving component (30).

10. The vibration control method of the spindle apparatus according to claim 9, wherein Before the shaft core (31) of the driving component (30) is controlled to stop moving based on the first control instructions, the method further comprises the following steps: The real-time vibration amplitudes are compared with preset amplitude thresholds, or the real-time vibration frequencies are compared with preset frequency thresholds, if the real-time vibration amplitudes are greater than or equal to a second predetermined proportion of the vibration thresholds or the real-time vibration frequencies are greater than or equal to a second predetermined proportion of the frequency thresholds, third control instructions are generated, wherein the second predetermined proportion is less than 1 and greater than the first predetermined proportion; According to the third control instructions, the motion parameters of the driving component (30) are reduced, the motion parameters include the rotating speed and the feeding speed and the feeding amount of the driving component (30).

Images