Main shaft error test system based on wireless acceleration sensor
Through the spindle error testing system based on wireless acceleration sensors, the problems of error separation and environmental impact in traditional testing methods are solved, and high-precision and low-cost spindle slewing error testing is achieved.
Patent Information
- Application Number
- CN202411823784.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2025-03-25
AI Technical Summary
The traditional spindle rotation accuracy test method relies on standard workpieces and precision ranging instruments, which have roundness errors and eccentricity errors, and are affected by ambient temperature fluctuations, so the test results are not reliable enough.
A spindle error testing system based on wireless acceleration sensor is adopted to collect time domain acceleration signals through wireless acceleration sensors and perform data processing to calculate gyro errors, including axial motion errors, pure radial motion errors and angular motion errors.
It realizes high-precision spindle error testing without the need for standard workpieces and precision distance measuring instruments. The test results are not affected by the error separation method and standard part accuracy, and are well adaptable to the environment.
Smart Images
Figure CN119689976A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of precision machinery, and in particular relates to a spindle error testing system based on a wireless acceleration sensor. Background Art
[0002] For high-precision spindles or turntables, their rotation error will significantly affect the machining accuracy of precision machining equipment or the detection accuracy of precision measuring instruments, generally resulting in reduced machining accuracy of machine tools and increased measurement uncertainty of instruments such as profilers. Therefore, spindle rotation accuracy tests must be performed on high-precision spindles or turntables during the development process or before they are put into use.
[0003] The traditional spindle rotation accuracy test method requires the use of standard workpieces and precision distance measuring instruments. The standard workpiece itself has roundness errors, and eccentricity errors will inevitably be introduced during the installation process, so the test results will include the above two errors. Therefore, error separation technology is needed to separate the errors, and the separation effect is affected by the separation method and the accuracy of the standard parts. In addition, precision distance measuring instruments such as laser interferometers need to be aligned with the standard workpiece before measurement, which takes a long time to adjust and is easily affected by ambient temperature fluctuations during the test. Summary of the invention
[0004] The present invention aims to solve the technical problems in the prior art and provides a spindle error testing system based on a wireless acceleration sensor.
[0005] In order to solve the above technical problems, the technical solutions of the present invention are as follows:
[0006] A spindle error test system based on a wireless acceleration sensor comprises: a wireless acceleration sensor, a signal receiver, a signal processor and a data processing module; the signal receiver, the signal processor and the data processing module are connected in sequence;
[0007] The wireless acceleration sensor is arranged on the end face of the high-precision spindle or the surface of the turntable;
[0008] The wireless acceleration sensor is used to collect time domain acceleration signals and send the collected signals to the signal receiver by wireless transmission;
[0009] The signal receiver is used to transmit the received signal to the signal processor;
[0010] The signal processor is used to store the signal received by the signal receiver and export it to the data processing module;
[0011] The data processing module is used to calculate the time domain acceleration data and convert it into the rotation error of the high-precision spindle or turntable.
[0012] In the above technical solution, the number of the wireless acceleration sensors is one, two or three.
[0013] In the above technical solution, the measurement accuracy of the wireless acceleration sensor is determined according to the magnitude of the rotation error of different spindles or turntables.
[0014] In the above technical solution, the tested spindle error includes: axial motion error and / or pure radial motion error and / or angular motion error.
[0015] In the above technical solution, the wireless acceleration sensor is of tri-directional or unidirectional type.
[0016] The present invention has the following beneficial effects:
[0017] The spindle error test system based on the wireless acceleration sensor of the present invention has the advantages of simple system, easy operation, low cost, etc.; it does not need to rely on standard workpieces (such as single-ball standard rods or double-ball standard rods) and precision distance measuring instruments, and the test can be completed only by the wireless acceleration sensor. The test data does not need to be separated by errors, so the test results are not affected by the separation method and the accuracy of the standard parts; it does not need precision distance measuring instruments such as laser interferometers, and has good environmental adaptability. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0019] Figure 1 It is a structural schematic diagram of the spindle error testing system based on the wireless acceleration sensor of the present invention.
[0020] Figure 2 The present invention is a schematic diagram of the sensor layout when the spindle error test system based on the wireless acceleration sensor is used to simultaneously test the axial motion error and the angular motion error.
[0021] Figure 3 A schematic diagram of the sensor layout when only the axial motion error is tested using the spindle error test system based on the wireless acceleration sensor of the present invention.
[0022] The reference numerals in the figures indicate:
[0023] 1- high-precision spindle end face or turntable table, 2- wireless acceleration sensor, 3- signal receiver, 4- signal processor, 5- data processing module. DETAILED DESCRIPTION
[0024] The inventive concept of the present invention is:
[0025] The spindle error testing system based on the wireless acceleration sensor of the present invention performs testing through the wireless acceleration sensor, and obtains the rotation accuracy of the high-precision spindle or turntable through data post-processing calculation based on the pasted acceleration sensor, thereby evaluating its performance index.
[0026] The spindle error testing system based on the wireless acceleration sensor of the present invention can perform testing without the aid of a standard workpiece (such as a single-ball standard rod or a double-ball standard rod) and a precision distance measuring instrument, and can quantitatively obtain the rotation accuracy of a high-precision spindle or turntable.
[0027] The present invention is described in detail below in conjunction with the accompanying drawings.
[0028] Embodiment 1:
[0029] The spindle error test system based on the wireless acceleration sensor of the present invention is composed of the following Figure 1 As shown, it includes: wireless acceleration sensor 2, signal receiver 3, signal processor 4 and data processing module 5; signal receiver 3, signal processor 4 and data processing module 5 are connected in sequence. Three wireless acceleration sensors 2 are arranged on the high-precision spindle end face or turntable table 1; wireless acceleration sensor 2 is used to collect time domain acceleration signal, and send the collected signal to signal receiver 3 by wireless transmission; signal receiver 3 is used to transmit the received signal to signal processor 4; signal processor 4 is used to store the signal received by signal receiver 3 and export it to data processing module 5; data processing module 5 is used to calculate time domain acceleration data, convert acceleration signal into displacement signal by quadratic integration, and further fit the in-plane point displacement and normal vector change of the high-precision spindle end face or turntable table. The axial and radial components of the in-plane point displacement represent the axial motion error and pure radial motion error of the high-precision spindle or turntable, and the radial component of the normal vector change represents the angular motion error.
[0030] In the spindle error test system based on wireless acceleration sensors of the present invention, three wireless acceleration sensors 2 are arranged on the high-precision spindle end face or the turntable table 1, and the three are not on the same straight line.
[0031] In the spindle error test system based on the wireless acceleration sensor of the present invention, the signal collected by the wireless acceleration sensor 2 is received by the signal receiver 3 through wireless transmission after frequency modulation and transmission, and then demodulated and stored by the signal processor 4, and finally exported to the data processing module 5 to calculate the rotation error of the high-precision spindle or turntable. The rotation error includes axial motion error, pure radial motion error, and angular motion error.
[0032] The wireless acceleration sensor 2 can be pasted on any high-precision spindle end face or turntable table 1, and at least three wireless acceleration sensors 2 need to be pasted.
[0033] The wireless acceleration sensor 2 is of three-way type, and its pasting position can be appropriately adjusted according to the structural form of the main shaft or the turntable.
[0034] Embodiment 2:
[0035] The spindle error test system based on the wireless acceleration sensor of the present invention is composed of the following Figure 1 As shown, it includes: a wireless acceleration sensor 2, a signal receiver 3, a signal processor 4 and a data processing module 5; the signal receiver 3, the signal processor 4 and the data processing module 5 are connected in sequence. Two wireless acceleration sensors 2 are arranged on the high-precision spindle end face or the turntable table 1; the wireless acceleration sensor 2 is used to collect time domain acceleration signals, and send the collected signals to the signal receiver 3 by wireless transmission; the signal receiver 3 is used to transmit the received signals to the signal processor 4; the signal processor 4 is used to store the signals received by the signal receiver 3 and export them to the data processing module 5; the data processing module 5 is used to calculate the time domain acceleration data, convert the acceleration signal into a displacement signal by quadratic integration, and further fit the displacement and plane inclination of the in-plane point of the high-precision spindle end face or the turntable table along the axial direction, the displacement of the in-plane point along the axial direction represents the axial motion error of the high-precision spindle or turntable, and the plane inclination represents the angular motion error.
[0036] See attached Figure 2 Two wireless acceleration sensors 2 are arranged on the high-precision spindle end face or turntable table 1 to be tested, and the axial motion error and the angular motion error can be tested at the same time. The specific test process is the same as that in Example 1 and will not be repeated here.
[0037] In this embodiment, two wireless acceleration sensors 2 are arranged at 180° (with the center of the high-precision spindle end face or turntable table 1 as the center of the circle, at the same distance from the center and 180° apart) on both sides of the high-precision spindle end face or turntable table 1. The type of wireless acceleration sensor 2 can be three-way or unidirectional.
[0038] Embodiment 3:
[0039] The spindle error test system based on the wireless acceleration sensor of the present invention is composed of the following Figure 1As shown, it includes: a wireless acceleration sensor 2, a signal receiver 3, a signal processor 4 and a data processing module 5; the signal receiver 3, the signal processor 4 and the data processing module 5 are connected in sequence. A wireless acceleration sensor 2 is set on the end face of the high-precision spindle or the turntable surface 1; the wireless acceleration sensor 2 is used to collect time domain acceleration signals, and send the collected signals to the signal receiver 3 by wireless transmission; the signal receiver 3 is used to transmit the received signals to the signal processor 4; the signal processor 4 is used to store the signals received by the signal receiver 3 and export them to the data processing module 5; the data processing module 5 is used to calculate the time domain acceleration data, and convert the acceleration signal into a displacement signal by quadratic integration, and the axial component of the displacement signal represents the axial motion error of the high-precision spindle or turntable.
[0040] See attached Figure 3 , a wireless acceleration sensor 2 is set on the high-precision spindle end face or turntable table 1 to be tested, and the axial motion error can be tested. The specific test process is the same as that of Example 1 and will not be repeated here.
[0041] In this embodiment, the wireless acceleration sensor 2 is arranged at the center of the high-precision spindle end face or the turntable table 1, and the type of the wireless acceleration sensor 2 can be three-way or one-way.
[0042] The contents not described in detail in the specification of the present invention belong to the technology recognized by those skilled in the art.
[0043] The spindle error test system based on the wireless acceleration sensor of the present invention has the advantages of simple system, easy operation, low cost, etc.; it does not need to rely on standard workpieces (such as single-ball standard rods or double-ball standard rods) and precision distance measuring instruments, and the test can be completed only by the wireless acceleration sensor. The test data does not need to be separated by errors, so the test results are not affected by the separation method and the accuracy of the standard parts; it does not need precision distance measuring instruments such as laser interferometers, and has good environmental adaptability.
[0044] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.
Claims
1. A spindle error test system based on a wireless acceleration sensor, characterized in that: include: A wireless acceleration sensor (2), a signal receiver (3), a signal processor (4) and a data processing module (5); the signal receiver (3), the signal processor (4) and the data processing module (5) are connected in sequence; The wireless acceleration sensor (2) is arranged on a high-precision spindle end face or a turntable surface (1); The wireless acceleration sensor (2) is used to collect time domain acceleration and send the collected signal to the signal receiver (3) by wireless transmission; The signal receiver (3) is used to transmit the received signal to the signal processor (4); The signal processor (4) is used to store the signal received by the signal receiver (3) and export it to the data processing module; The data processing module (5) is used to calculate the time domain acceleration data and convert it into a rotation error of a high-precision spindle or turntable.
2. The spindle error test system based on the wireless acceleration sensor according to claim 1, characterized in that: The number of the wireless acceleration sensors (2) is one, two or three.
3. The spindle error test system based on wireless acceleration sensor according to claim 1, characterized in that: The measurement accuracy of the wireless acceleration sensor (2) is determined according to the magnitude of the rotation error.
4. The spindle error test system based on wireless acceleration sensor according to claim 1, characterized in that: The spindle errors tested include: axial motion error and / or pure radial motion error and / or angular motion error.
5. The spindle error testing system based on wireless acceleration sensor according to claim 1, characterized in that: The wireless acceleration sensor (2) is of a three-way or a one-way type.