Shafting rotation precision measuring device and method

Abstract

A shafting rotation precision measuring device and method are suitable for shafting rotation precision measurement of a shaft end assembly, the shafting rotation precision measuring device comprises a lens reflection tool and a rotation precision measuring device from the function aspect, and the readings of a single-shaft photoelectric autocollimator in the horizontal direction and the vertical direction are expanded into Fourier series respectively; first harmonic function calculation is carried out on Fourier series based on a gradienter method, two rectangular coordinates can be obtained, the two components are synthesized, the shaft system rotation precision can be obtained, and the device is simple in structure, convenient to operate and wide in application range. The test verifies and proves that the detection requirement on the rotation precision of the shaft system can be met, and the method has practical engineering significance.

Description

TECHNICAL FIELD

[0001] The application relates to a shafting rotation precision measuring device and method, and belongs to the field of shafting component design. BACKGROUND

[0002] The shafting has strict requirements on rotation precision, and the detection technology of the rotation precision of the shafting plays a decisive role in the performance of the whole system and the precision of the measurement results. The requirements on the precision of the high-precision shafting are also very strict. The detection of the precision of the shafting is relatively simple, and with the development and wider and wider use of the shafting, the detection of the precision of the shafting is also required to be higher and higher. The traditional test methods are angle difference detection and value transmission detection, and the two methods need to perform multiple times of reference transmission, have large precision errors, and are greatly affected by the visual effects of operators, the data processing and calculation process is complicated, and errors are prone to occur, and the level gauge method has simple data processing and calculation process. SUMMARY

[0003] The application solves the technical problem that the error of the traditional shafting component test method is large in the prior art.

[0004] The application solves the above technical problem by the following technical scheme:

[0005] The application provides a shafting rotation precision measuring device, which comprises an industrial computer, a marble flat plate, a single-axis photoelectric autocollimator and a lens reflection tool.

[0006] The shafting to be measured and the single-axis photoelectric autocollimator for measuring the rotation precision of the shafting to be measured are arranged on the marble flat plate, and the industrial computer for controlling the action of the single-axis photoelectric autocollimator is arranged at one end of the marble flat plate close to the single-axis photoelectric autocollimator; and the lens reflection tool is arranged on the shaft end face of the shafting to be measured close to the single-axis photoelectric autocollimator, and serves as the measurement object of the single-axis photoelectric autocollimator.

[0007] The single-axis photoelectric autocollimator is fixed on the two sides of the surface of the marble flat plate after being leveled by a specified precision level before installation, and the leveling requirement is that the non-horizontal error between the surface of the marble flat plate and the single-axis photoelectric autocollimator meets the preset range.

[0008] The lens reflection tool comprises an adapter plate, a lens seat, a lens cover, a plane mirror and a connecting assembly.

[0009] The adapter plate is fixed on the shaft end face of the shafting to be measured close to the single-axis photoelectric autocollimator, the lens seat is fixed on the adapter plate through the connecting assembly, the plane mirror is arranged on the lens seat, the lens cover covers the surface of the lens seat, and the single-axis photoelectric autocollimator measures the installation precision of the plane mirror to reflect the rotation precision of the shafting to be measured.

[0010] The connecting assembly comprises a tightening screw and three adjusting screws (11), the mirror seat is fixed on the adapter plate by the tightening screw, and the plane mirror is arranged on the mirror seat by the adjusting screws (11), which are used to adjust the installation precision measurement value of the plane mirror relative to the single-axis photoelectric autocollimator to meet the precision measurement range.

[0011] The installation precision measurement value of the plane mirror measured by the single-axis photoelectric autocollimator is considered to meet the precision measurement range when the deviations in the horizontal direction and the vertical direction are both not more than 10″, and the preset range of the non-horizontal error of the marble plate surface relative to the single-axis photoelectric autocollimator is not more than 30″.

[0012] The installation precision measurement value comprises a horizontal measurement value and a vertical measurement value, and the horizontal measurement value and the vertical measurement value are respectively expanded into Fourier series and then subjected to first harmonic function calculation to obtain two rectangular coordinate components, and the two rectangular coordinate components are combined to obtain the rotation accuracy of the shaft system to be measured.

[0013] A measurement method implemented by the shaft system rotation accuracy measurement device, comprising:

[0014] The single-axis photoelectric autocollimator is fastened to the marble plate by the tightening screw, and the industrial computer is arranged on the other side of the marble plate;

[0015] The working surfaces of the marble plate and the single-axis photoelectric autocollimator are leveled by the specified precision level until the preset range of the non-horizontal error is met;

[0016] The lens reflection tool is installed on the shaft end surface of one side of the shaft system to be measured;

[0017] The three adjusting screws are adjusted, so that the installation precision measurement value of the shaft system to be measured in the single-axis photoelectric autocollimator rotating by 360° meets the precision measurement range displayed on the industrial computer;

[0018] The measurement of the rotation accuracy of the shaft system to be measured is started, the single-axis photoelectric autocollimator is controlled by the industrial computer, and a group of horizontal measurement value and vertical measurement value reflected by the lens reflection tool are recorded every 10°;

[0019] The horizontal measurement value and the vertical measurement value are respectively expanded into Fourier series, the Fourier series is subjected to first harmonic function calculation, and two rectangular coordinate components obtained by the calculation are combined to obtain the rotation accuracy of the shaft system to be measured.

[0020] After the measurement and recording of each group of horizontal measurement value and vertical measurement value are completed for one lens reflection tool fixing position, the lens reflection tool fixing position is adjusted by the adjusting screws (11), and the measurement and recording of each group of horizontal measurement value and vertical measurement value are re-performed, and after the lens reflection tool fixing position traverses all preset positions, the entire measurement is completed.

[0021] The average of the measurement records of each group of horizontal measurement values and vertical measurement values corresponding to the fixed positions of the lens reflection tool is taken as the final detection result of the rotation accuracy of the shaft system to be measured.

[0022] The method for obtaining the rotation accuracy of the shaft system to be measured is as follows:

[0023] The horizontal measurement value and the vertical measurement value of the shaft system to be measured are recorded once every 10° of rotation, and are denoted as W x1 and W x2 , respectively.

[0024] The Fourier series is expanded respectively, and the Fourier series is calculated by a first harmonic function to obtain two rectangular coordinate components ΔW x1 and ΔW x2 , and the rotation accuracy of the shaft system to be measured is determined after the synthesis of the rectangular coordinate components.

[0025]

[0026] Compared with the prior art, the present application has the following advantages:

[0027] The shaft system rotation accuracy measuring device and method provided by the present application can improve the shaft system installation rotation test accuracy through the structural improvement of the lens reflection tool and the process design based on the level method, and simplify the structural design of the shaft system rotation accuracy measuring device. The overall measurement operation is convenient, the application range is wider, and the detection requirements of the shaft system rotation accuracy can be met. At the same time, based on the process design of the level method, only two horizontal measurement values and vertical measurement values are used, and the shaft system rotation accuracy can be obtained through simple calculation. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 The shaft system rotation accuracy measuring device provided by the present application is a structural schematic diagram;

[0029] Figure 2 The lens reflection tool provided by the present application is a structural schematic diagram. DETAILED DESCRIPTION

[0030] The shaft system rotation accuracy measuring device and method are suitable for the shaft system rotation accuracy measurement of shaft end assemblies, and include a lens reflection tool and a rotation accuracy measuring device from the functional aspect. The readings in the horizontal and vertical directions of a single-axis photoelectric autocollimator are expanded into Fourier series, a first harmonic function calculation is performed on the Fourier series based on the level method, two rectangular coordinates can be obtained, and the shaft system rotation accuracy can be obtained by synthesizing the two components. The structure is simple, the operation is convenient, and the application range is wide. The test verification proves that the detection requirements of the shaft system rotation accuracy can be met, and the present application has practical engineering significance.

[0031] Shaft rotation accuracy measuring device, such as Figure 1 As shown, it includes an industrial computer 1, a marble plate 2, a single-axis photoelectric autocollimator 3, and a lens reflection tool 5, wherein:

[0032] The axis system to be measured and a single-axis photoelectric autocollimator 3 for measuring the rotation accuracy of the axis system to be measured are arranged on a marble plate 2. An industrial computer 1 for controlling the movement of the single-axis photoelectric autocollimator 3 is arranged at the end of the marble plate 2 close to the single-axis photoelectric autocollimator 3; a lens reflection tooling 5 is arranged on the axis system to be measured close to the single-axis photoelectric autocollimator 3, serving as the measurement object of the single-axis photoelectric autocollimator 3.

[0033] Before installation, the single-axis photoelectric autocollimator 3 is leveled with a specified precision level and then fixed on both sides of the surface of the marble slab 2. The leveling requirement is that the non-levelness error between the surface of the marble slab 2 and the single-axis photoelectric autocollimator 3 meets the preset range.

[0034] The lens reflection tooling 5 includes an adapter plate 6, a mirror base 7, a mirror cover 8, a plane mirror 9, and a connecting assembly, wherein:

[0035] The adapter plate 6 is fixed to the axial end face of the axis system to be measured close to the single-axis photoelectric autocollimator 3. The mirror base 7 is fixed to the adapter plate 6 through a connecting component. The plane mirror 9 is set on the mirror base 7. The mirror cover 8 covers the surface of the mirror base 7. The single-axis photoelectric autocollimator 3 reflects the rotation accuracy of the axis system to be measured by measuring the installation accuracy of the plane mirror 9.

[0036] The connecting assembly includes a tightening screw 10 and an adjusting screw 11. The mirror base 7 is fixed to the adapter plate 6 by tightening the screw 10. The plane mirror 9 is set on the mirror base 7 by adjusting the screw 11. There are 3 adjusting screws 11, which are used to adjust the installation accuracy measurement value of the plane mirror 9 relative to the uniaxial photoelectric autocollimator 3 to meet the accuracy measurement range.

[0037] When the installation accuracy measurement values ​​of the plane mirror 9 measured by the single-axis photoelectric autocollimator 3 do not exceed 10" in the horizontal and vertical directions, it is considered to meet the accuracy measurement range; the preset range of the non-levelness error between the surface of the marble slab 2 and the single-axis photoelectric autocollimator 3 is no more than 30".

[0038] When the installation accuracy measurement values ​​of the plane mirror 9 measured by the single-axis photoelectric autocollimator 3 do not exceed 10" in the horizontal and vertical directions, it is considered to meet the accuracy measurement range; the preset range of the non-levelness error between the surface of the marble slab 2 and the single-axis photoelectric autocollimator 3 is no more than 30".

[0039] The specific steps of the measurement method implemented using the above device are:

[0040] The single-axis photoelectric autocollimator 3 is fastened on the marble flat plate 2 by screwing the screw 10, and the industrial computer 1 is arranged on the other side of the marble flat plate 2;

[0041] The working surface of the marble flat plate 2 and the single-axis photoelectric autocollimator 3 is leveled by specifying the precision leveler until the preset range of the non-horizontal error is met;

[0042] The lens reflection tool 5 is installed on the shaft end surface of one side of the shaft system to be measured;

[0043] The three adjusting screws are adjusted so that the installation precision measurement value of the shaft system to be measured measured by the single-axis photoelectric autocollimator 3 rotating 360° meets the precision measurement range displayed on the industrial computer 1;

[0044] The measurement of the rotation precision of the shaft system to be measured is started, and the single-axis photoelectric autocollimator 3 is controlled by the industrial computer 1 to rotate, and a group of horizontal measurement values and vertical measurement values reflected by the lens reflection tool 5 are recorded every 10°;

[0045] The horizontal measurement values and the vertical measurement values are respectively expanded into Fourier series, and the two rectangular coordinate components obtained by calculating the Fourier series are combined to obtain the rotation precision of the shaft system to be measured.

[0046] After the measurement and recording of each group of horizontal measurement values and vertical measurement values are completed for one fixed position of the lens reflection tool 5, the fixed position of the lens reflection tool 5 is adjusted by adjusting the screw 11, and the measurement and recording of each group of horizontal measurement values and vertical measurement values are re-performed, and after the fixed position of the lens reflection tool 5 traverses all the preset positions, the entire measurement is completed.

[0047] After the measurement and recording of each group of horizontal measurement values and vertical measurement values corresponding to each fixed position of the lens reflection tool 5 are averaged, the average value is taken as the final detection result of the rotation precision of the shaft system to be measured.

[0048] The following will be further described in conjunction with the drawings and preferred embodiments of the specification:

[0049] In the current embodiment, the horizontal and vertical values measured by the photoelectric autocollimator 3 on the corresponding lens reflection tool 5 of the shaft system 4 on the marble flat plate 2 can be respectively expanded into Fourier series, and the two rectangular coordinate components can be obtained by calculating the Fourier series, and the two components can be combined to obtain the rotation precision of the shaft system.

[0050] Embodiment one:

[0051] The single-axis photoelectric autocollimator 3 selects a W400 single-axis CCD photoelectric autocollimator, which can achieve a measurement precision of ±1″ within a range of ±400″.

[0052] The lens reflection tooling material is high-quality alloy steel, which has good stability and positioning accuracy after heat treatment and super finishing, as shown in Figure 2 The adapter plate 6 is fixed on the measured shafting 4, the mirror seat 7 is fixed on the adapter plate 6 by tightening the screw 10, the mirror cover 8 and the plane mirror 9 are sequentially linked to the mirror seat 7, the adjusting screw 11 can make fine adjustment of the plane mirror 9, and after adjusting the installation angle to make the horizontal and vertical values measured in 360° rotation have a deviation of not more than 10″, the installation error between them can be ignored.

[0053] The overall measurement device is as follows:

[0054] (1) The single-axis photoelectric autocollimator is fastened on the marble platform by screws; 2 The body is placed on the marble platform, and the marble platform and the working surface are leveled to an error of not more than 30″ by using a 10″ precision level; 3 The adapter plate, mirror seat, mirror cover, plane mirror, tightening screw and adjusting screw in the lens reflection tooling are sequentially installed on the measured shaft end surface; 4 By adjusting the three adjusting screws, the readings of the single-axis photoelectric autocollimator in the horizontal and vertical directions are displayed within 10″ when the measured body rotates 360°. 5 The shafting rotation accuracy is measured, and the readings in the horizontal and vertical directions are recorded every 10°; 6 The measured values can be respectively expanded into Fourier series, and the two rectangular coordinate components can be obtained by calculating the Fourier series as a harmonic function, and the shafting rotation accuracy can be obtained by combining the two components.

[0055] During the test verification process, the rotation error of the horizontal shaft is detected, the single-axis photoelectric autocollimator is fastened on the marble platform by screws, the body is placed on the marble platform, and the marble platform and the working surface are leveled to an error of not more than 30″ by using a 10″ precision level, the adapter plate, mirror seat, mirror cover, plane mirror, tightening screw and adjusting screw in the lens reflection tooling are sequentially installed on the measured body shaft end surface, and the readings of the single-axis photoelectric autocollimator in the horizontal and vertical directions are displayed within 10″ by adjusting the three adjusting screws. The shafting rotation accuracy is measured, and the readings in the horizontal and vertical directions are recorded every 10°, the measured values can be respectively expanded into Fourier series, and the two rectangular coordinate components can be obtained by calculating the Fourier series as a harmonic function, and the shafting rotation accuracy can be obtained by combining the two components. The test results are shown in Table 1 below.

[0056] Table 1 Rotation accuracy measurement data

[0057]

[0058]

[0059]

[0060] The X and Y values of 36 angle positions are taken, three groups are taken respectively, the rotation accuracy is measured, and the final detection result is obtained by taking the average value.

[0061] Although the present application has been disclosed with the above preferred embodiments, it is not intended to limit the present application, and any person skilled in the art can make possible changes and modifications to the technical solutions of the present application by using the disclosed methods and technical contents without departing from the spirit and scope of the present application.

[0062] The contents not described in detail in the specification of the present application belong to the known technology of those skilled in the art.

Claims

1. A shaft rotation accuracy measuring device, characterized by: The invention comprises an industrial control computer (1), a marble plate (2), a single-axis photoelectric autocollimator (3), and a lens reflection tool (5), wherein: A shaft system to be measured and a single-axis photoelectric autocollimator (3) for measuring the rotation accuracy of the shaft system to be measured are arranged on a marble plate (2); an industrial control computer (1) for controlling the movement of the single-axis photoelectric autocollimator (3) is arranged on the end of the marble plate (2) close to the single-axis photoelectric autocollimator (3); and a lens reflection tool (5) is arranged on the shaft system to be measured close to the single-axis photoelectric autocollimator (3) and serves as a measurement object of the single-axis photoelectric autocollimator (3).

2. The shaft system rotation accuracy measuring device according to claim 1, characterized in that: The single-axis photoelectric autocollimator (3) is fixed to both sides of the surface of the marble slab (2) after being leveled by a leveler of specified precision before installation. The leveling requirement is that the leveling error between the surface of the marble slab (2) and the single-axis photoelectric autocollimator (3) meets a preset range.

3. The shaft system rotation accuracy measuring device according to claim 1, characterized in that: The lens reflection tooling (5) comprises an adapter plate (6), a mirror base (7), a mirror cover (8), a plane mirror (9), and a connecting assembly, wherein: The adapter plate (6) is fixed to the shaft end face of the axis system to be measured close to the single-axis photoelectric autocollimator (3); the mirror seat (7) is fixed to the adapter plate (6) through a connecting assembly; the plane mirror (9) is arranged on the mirror seat (7); the mirror cover (8) covers the surface of the mirror seat (7); and the single-axis photoelectric autocollimator (3) reflects the rotation accuracy of the axis system to be measured by measuring the installation accuracy of the plane mirror (9).

4. The shaft system rotation accuracy measuring device according to claim 3, characterized in that: The connecting assembly comprises a tightening screw (10) and an adjusting screw (11); the mirror base (7) is fixed to the adapter plate (6) by tightening the screw (10); the plane mirror (9) is arranged on the mirror base (7) by adjusting the screw (11); the adjusting screws (11) are three in number and are used to adjust the installation accuracy measurement value of the plane mirror (9) relative to the single-axis photoelectric autocollimator (3) to meet the accuracy measurement range.

5. The shaft system rotation accuracy measuring device according to claim 4, characterized in that: When the installation accuracy measurement values ​​of the plane mirror (9) measured by the single-axis photoelectric autocollimator (3) do not exceed 10" in the horizontal and vertical directions, it is considered to meet the accuracy measurement range; the preset range of the non-levelness error between the surface of the marble slab (2) and the single-axis photoelectric autocollimator (3) is no more than 30".

6. The shaft system rotation accuracy measuring device according to claim 4, characterized in that: The installation accuracy measurement value includes a horizontal measurement value and a vertical measurement value. The horizontal measurement value and the vertical measurement value are respectively expanded into Fourier series and then a harmonic function calculation is performed to obtain two rectangular coordinate components. The two rectangular coordinate components are synthesized to obtain the rotation accuracy of the axis system to be measured.

7. A measurement method implemented by the shaft system rotation accuracy measurement device according to claim 6, characterized in that include: The single-axis photoelectric autocollimator (3) is fastened to the marble slab (2) by tightening the screws (10), and the industrial computer (1) is placed on the other side of the marble slab (2); Leveling the marble plate (2) and the working surface of the single-axis photoelectric autocollimator (3) by using a level with a specified precision until the pre-set range of the non-levelness error is satisfied; Installing the lens reflection fixture (5) to the shaft end face on one side of the shaft system to be measured; Adjust the three adjustment screws so that the installation accuracy measurement value measured by the single-axis photoelectric autocollimator (3) when the axis to be measured rotates 360° and the display value on the industrial computer (1) meets the accuracy measurement range; The measurement of the rotation accuracy of the axis system to be measured is started, and the single-axis photoelectric autocollimator (3) is controlled to rotate by the industrial control computer (1), and a set of horizontal measurement values ​​and vertical measurement values ​​reflected by the lens reflective tooling (5) are recorded every 10 degrees; The horizontal and vertical measurement values ​​are expanded into Fourier series respectively, and a harmonic function calculation is performed on the Fourier series. The two rectangular coordinate components obtained by the calculation are synthesized to obtain the rotation accuracy of the axis system to be measured.

8. The measuring method according to claim 7, wherein: After completing the measurement and recording of each group of horizontal measurement values ​​and vertical measurement values ​​for a fixed position of the lens reflective fixture (5), the fixed position of the lens reflective fixture (5) is adjusted by adjusting the screw (11), and then re-performing the measurement and recording of each group of horizontal measurement values ​​and vertical measurement values. After the fixed position of the lens reflective fixture (5) traverses all preset positions, all measurements are completed.

9. The measuring method according to claim 8, characterized in that: After taking the average value of the measurement records of each group of horizontal measurement values ​​and vertical measurement values ​​corresponding to the fixed position of each mounting lens reflection tooling (5), the average value is used as the final detection result of the rotation accuracy of the axis system to be measured.

10. The measuring method according to claim 9, characterized in that: The method to obtain the rotation accuracy of the axis system to be measured is: The horizontal and vertical measurement values ​​of the axis system to be measured are recorded every 10° rotation and are marked as W x1 and W x2 ; Expand them into Fourier series respectively, and perform a harmonic function calculation on the Fourier series to obtain two rectangular coordinate components ΔW x1 and ΔW x2 , and then synthesize the rectangular coordinate components to determine the rotation accuracy of the axis system to be measured:

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