Calibration Method for Multi-Probe Measuring Device

Abstract

The present invention discloses a calibration method for a multi-probe measuring device. The measuring device is used to measure the end face runout and cylindrical runout of an aero-engine rotor. The measuring device is a measuring device provided with two or more probes. The probes are divided into calibration probes and actual measurement probes. The calibration method of the measuring device consists of the following steps: Place a calibration master gauge with the same preparation structure as the aero-engine rotor at the center position of the turntable of the measuring device. Fit the calibration probe to the calibration position of the calibration master gauge. Start the turntable and rotate it one week so that the turntable drives the calibration master gauge to rotate. Calibrate the measuring device according to the data measured by the calibration probe and establish a reference coordinate system. Fit the actual measurement probe to the actual measurement position of the calibration master gauge. Calibrate the measuring device according to the data measured by the actual measurement probe under the reference coordinate system. The present invention can improve the measurement accuracy of aero-engine rotor products, reduce measurement errors, and ensure the repeatability of measurement results.

Description

Technical Field

[0001] The present invention belongs to the field of aero-engine assembly, and particularly relates to a calibration method for a multi-probe measuring device. Background Art

[0002] In the field of aviation machinery manufacturing, in order to obtain the geometric parameters of machined parts, a coordinate measuring machine is generally used for measurement. In order to ensure the measurement accuracy of the probe of the coordinate measuring machine, the internationally common method is to calibrate the probe with a standard ball, that is, to calibrate with a ruby ball, which can well ensure the measurement accuracy of a coordinate measuring machine with a single probe. In the field of aero-engine manufacturing, after the assembly of the aero-engine rotor, various indicators need to meet certain accuracy requirements before leaving the factory for use. Using a single probe for measurement has low efficiency and low productivity of the enterprise. Therefore, in actual production, multiple probes are often used simultaneously and cooperate with each other for measurement to improve production efficiency. However, for a measuring device with multiple probes, the above method cannot be used for calibration. Summary of the Invention

[0003] The purpose of the present invention is to provide a calibration method for a multi-probe measuring device to solve the problems that it is difficult to calibrate multiple probes of the multi-probe measuring device and the standard ball of the prior art cannot calibrate it.

[0004] The present invention adopts the following technical solutions: A calibration method for a multi-probe measuring device, the measuring device is used to measure the end face runout and cylindrical runout of an aero-engine rotor, the measuring device is a measuring device provided with two or more probes, and the probes are divided into calibration probes and actual measurement probes.

[0005] The calibration method of the measuring device consists of the following steps:

[0006] Place a calibration master gauge with the same preparation structure as the aero-engine rotor at the center position of the turntable of the measuring device, and make the axis of the calibration master gauge coincide with the axis of the turntable.

[0007] Attach the calibration probe to the calibration position of the calibration master gauge, start the turntable and rotate it one week so that the turntable drives the calibration master gauge to rotate, calibrate the measuring device according to the data measured by the calibration probe, and establish a reference coordinate system.

[0008] Attach the actual measurement probe to the actual measurement position of the calibration master gauge, start the turntable and rotate it one week so that the turntable drives the calibration master gauge to rotate, and calibrate the measuring device according to the data measured by the actual measurement probe in the reference coordinate system.

[0009] Both the calibration position and the actual measurement position are any plane or any curved surface of the calibration master gauge.

[0010] Further, when the measuring device is used to measure the end face runout and radial runout of the rotor of the circular-arc end tooth connection structure of an aeroengine,

[0011] The calibration master gauge is exactly the same as the structural dimensions of the rotor of the circular-arc end tooth connection structure of the aeroengine, and includes:

[0012] The upper circular plate is horizontally arranged.

[0013] The upper circular ring is horizontally arranged and sleeved on the periphery of the upper circular plate, and is coaxially arranged with the upper circular ring.

[0014] The column is vertically arranged, coaxially arranged with the upper circular ring, located below the upper circular plate, and its upper end is fixedly connected to the central position on the lower side of the upper circular plate. An upper groove and a lower groove are respectively formed along the outer wall for one week.

[0015] The lower circular plate is horizontally arranged, coaxially arranged with the upper circular ring and has the same size, located below the column, and the central position on its upper side is fixedly connected to the lower end of the column.

[0016] The lower circular ring is horizontally arranged and sleeved on the periphery of the lower circular plate, and is coaxially arranged with the upper circular ring.

[0017] Further, two calibration probes are provided, namely a first calibration probe and a second calibration probe respectively.

[0018] The first calibration probe is used to fit on the upper end face of the upper circular ring of the calibration master gauge and measure the first calibration data. The first calibration measurement data is used to fit the end face runout value of the first calibration plane.

[0019] The second calibration probe is used to fit on the inner wall surface on the upper side of the upper circular ring of the calibration master gauge and measure the second calibration data. The second calibration data is used to fit the cylindrical runout value of the second calibration surface.

[0020] Two actual measurement probes are provided, namely a third actual measurement probe and a fourth actual measurement probe respectively.

[0021] The third actual measurement probe is used to fit on the lower end face of the upper circular ring of the calibration master gauge and measure the third actual measurement data. The third actual measurement data is used to fit the end face runout value of the third actual measurement plane.

[0022] The fourth actual measurement probe is used to fit on the inner wall surface on the lower side of the upper circular ring of the calibration master gauge and measure the fourth actual measurement data. The fourth actual measurement data is used to fit the cylindrical runout value of the fourth actual measurement surface.

[0023] The calibration method includes:

[0024] Calculate the flatness of the first calibration plane based on the end face runout value of the first calibration plane, and compare the flatness of the first calibration plane with the preset value of the first calibration plane. When the flatness of the first calibration plane ≥ the preset value of the first calibration plane, perform centering and tilting adjustment on the turntable until the flatness of the first calibration plane < the preset value of the first calibration plane.

[0025] Calculate the roundness of the second calibration surface based on the cylindrical runout value of the second calibration surface, and compare the roundness of the second calibration surface with the preset value of the second calibration surface. When the roundness of the second calibration surface ≥ the preset value of the second calibration surface, perform centering and tilting adjustment on the turntable until the roundness of the second calibration surface < the preset value of the second calibration surface.

[0026] Establish a reference coordinate system using the end face runout value of the first calibration plane and the cylindrical runout value of the second calibration surface.

[0027] Under the reference coordinate system, calculate the flatness of the third measured plane based on the end face runout value of the third measured plane, and compare the flatness of the third measured plane with the preset value of the third measured plane. When the flatness of the third measured plane ≥ the preset value of the third measured plane, perform centering and tilting adjustment on the turntable until the flatness of the third measured plane < the preset value of the third measured plane.

[0028] Under the reference coordinate system, calculate the roundness of the fourth measured surface based on the cylindrical runout value of the fourth measured surface, and compare the roundness of the fourth measured surface with the preset value of the fourth measured surface. When the roundness of the fourth measured surface ≥ the preset value of the fourth measured surface, perform centering and tilting adjustment on the turntable until the roundness of the fourth measured surface < the preset value of the fourth measured surface.

[0029] Furthermore, the third measured probe is also used to fit against the upper end face of the lower ring of the calibration master gauge and measure the fifth measured data, and the fifth measured data is used to fit the end face runout value of the fifth measured plane.

[0030] The fourth measured probe is also used to fit against the outer wall surface of the lower ring of the calibration master gauge and measure the sixth measured data, and the sixth measured data is used to fit the cylindrical runout value of the sixth measured surface.

[0031] The calibration method includes:

[0032] Under the reference coordinate system, calculate the flatness of the fifth measured plane based on the end face runout value of the fifth measured plane, and compare the flatness of the fifth measured plane with the preset value of the fifth measured plane. When the flatness of the fifth measured plane ≥ the preset value of the fifth measured plane, perform centering and tilting adjustment on the turntable until the flatness of the fifth measured plane < the preset value of the fifth measured plane.

[0033] In the reference coordinate system, calculate the roundness of the sixth measured surface according to the cylindrical runout value of the sixth measured surface, and compare the roundness of the sixth measured surface with the preset value of the sixth measured surface. When the roundness of the sixth measured surface ≥ the preset value of the sixth measured surface, perform centering and tilting adjustment on the turntable until the roundness of the sixth measured surface < the preset value of the sixth measured surface.

[0034] Further,

[0035] The third measured probe is also used to fit against the inner wall surface of the groove on the column of the calibration master gauge and measure the seventh measured data, and the seventh measured data is used to fit the cylindrical runout value of the seventh measured surface.

[0036] The fourth measured probe is also used to fit against the inner wall surface of the lower groove on the column of the calibration master gauge and measure the eighth measured data, and the eighth measured data is used to fit the cylindrical runout value of the eighth measured surface.

[0037] The calibration method includes:

[0038] In the reference coordinate system, calculate the roundness of the seventh measured surface according to the cylindrical runout value of the seventh measured surface, and compare the roundness of the seventh measured surface with the preset value of the seventh measured surface. When the roundness of the seventh measured surface ≥ the preset value of the seventh measured surface, perform centering and tilting adjustment on the turntable until the roundness of the seventh measured surface < the preset value of the seventh measured surface;

[0039] In the reference coordinate system, calculate the roundness of the eighth measured surface according to the cylindrical runout value of the eighth measured surface, and compare the roundness of the eighth measured surface with the preset value of the eighth measured surface. When the roundness of the eighth measured surface ≥ the preset value of the eighth measured surface, perform centering and tilting adjustment on the turntable until the roundness of the eighth measured surface < the preset value of the eighth measured surface.

[0040] Further, the calibration method also includes:

[0041] Calculate the coaxiality of the second calibration surface according to the cylindrical runout value of the second calibration surface, and compare the coaxiality of the second calibration surface with the preset coaxiality value of the second calibration surface. When the coaxiality of the second calibration surface ≥ the preset coaxiality value of the second calibration surface, perform centering and tilting adjustment on the turntable until the coaxiality of the second calibration surface < the preset coaxiality value of the second calibration surface,

[0042] In the reference coordinate system, calculate the coaxiality of the fourth measured surface according to the cylindrical runout value of the fourth measured surface, and compare the coaxiality of the fourth measured surface with the preset coaxiality value of the fourth measured surface. When the coaxiality of the fourth measured surface ≥ the preset coaxiality value of the fourth measured surface, perform centering and tilting adjustment on the turntable until the coaxiality of the fourth measured surface < the preset coaxiality value of the fourth measured surface.

[0043] Furthermore, the calibration method further includes:

[0044] In the reference coordinate system, calculate the coaxiality of the seventh measured surface according to the cylindrical runout value of the seventh measured surface, and compare the coaxiality of the seventh measured surface with the preset value of the coaxiality of the seventh measured surface. When the coaxiality of the seventh measured surface ≥ the preset value of the coaxiality of the seventh measured surface, perform centering and tilting adjustment on the turntable until the coaxiality of the seventh measured surface < the preset value of the coaxiality of the seventh measured surface;

[0045] In the reference coordinate system, calculate the coaxiality of the eighth measured surface according to the cylindrical runout value of the eighth measured surface, and compare the coaxiality of the eighth measured surface with the preset value of the coaxiality of the eighth measured surface. When the coaxiality of the eighth measured surface ≥ the preset value of the coaxiality of the eighth measured surface, perform centering and tilting adjustment on the turntable until the coaxiality of the eighth measured surface < the preset value of the coaxiality of the eighth measured surface.

[0046] The beneficial effects of the present invention are:

[0047] By setting a high-precision calibration master gauge with the same structure as the aero-engine rotor preparation structure, then using a probe to measure the corresponding positions of the calibration master gauge, and further calibrating the measuring device. After the measuring device is calibrated, replace the calibration master gauge with a real aero-engine rotor, and then measure the aero-engine rotor, which improves the measurement efficiency;

[0048] The number of probes of the present invention can be designed according to the structure of the aero-engine rotor to be measured, which can improve the measurement accuracy of the aero-engine rotor product, reduce the measurement error, ensure the repeatability of the measurement result, and can quickly calibrate the probe of the measuring device to improve the measurement speed; The present invention takes a high-precision measurement system with 4 probes as the object and develops a calibration standard master gauge, a calibration method and an evaluation method. Description of the Drawings

[0049] Figure 1 It is a schematic structural diagram of the calibration master gauge of the present invention.

[0050] Wherein: 1. upper circular plate; 2. upper ring; 3. column; 4. upper groove; 5. lower groove; 6. lower circular plate; 7. lower ring. Detailed Embodiments

[0051] The present invention will be described in detail below with reference to the drawings and specific embodiments.

[0052] It should be noted that the structures, ratios, sizes, etc. shown in the attached drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the efficacy that the present invention can produce and the purpose that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention.

[0053] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the attached drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation of the present invention. Without substantial change in the technical content, it should also be regarded as the scope where the present invention can be implemented.

[0054] The present invention discloses a calibration method for a multi-probe measuring device. As Figure 1 shown, the measuring device is used to measure the end face runout and cylindrical runout of an aero-engine rotor. The measuring device is a measuring device provided with two or more probes. The probes are divided into calibration probes and actual measurement probes. The calibration method of the measuring device consists of the following steps:

[0055] Place a calibration master gauge with the same structure as the aero-engine rotor at the center position of the turntable of the measuring device, and make the axis of the calibration master gauge coincide with the axis of the turntable.

[0056] Attach the calibration probe to the calibration position of the calibration master gauge, start the turntable and rotate it one week so that the turntable drives the calibration master gauge to rotate. Calibrate the measuring device according to the data measured by the calibration probe, and establish a reference coordinate system according to the data measured by the calibration probe.

[0057] Attach the actual measurement probe to the actual measurement position of the calibration master gauge, start the turntable and rotate it one week so that the turntable drives the calibration master gauge to rotate. Calibrate the measuring device according to the data measured by the actual measurement probe in the reference coordinate system. The calibration position and the actual measurement position are both any plane of the calibration master gauge, and the calibration position and the actual measurement position can also be any curved surface of the calibration master gauge.

[0058] When the measuring device is used to measure the end face runout and radial runout of the rotor of the aero-engine circular arc end tooth connection structure, as Figure 1 shown, the calibration master gauge has the same structural dimensions as the rotor of the aero-engine circular arc end tooth connection structure, and includes: upper circular plate 1, upper ring 2, column 3, lower circular plate 6, lower ring 7.

[0059] The upper circular plate 1 is horizontally arranged, the upper ring 2 is horizontally arranged, the upper ring 2 is sleeved on the periphery of the upper circular plate 1, the upper ring 2 is coaxially arranged with the upper circular plate 1, the column 3 is vertically arranged, the column 3 is coaxially arranged with the upper ring 2, the column 3 is located below the upper circular plate 1, and the upper end of the column 3 is fixedly connected to the central position on the lower side of the upper circular plate 1. An upper groove 4 and a lower groove 5 are respectively formed around the outer wall of the column 3 for one week.

[0060] The lower circular plate 6 is horizontally arranged, the lower circular plate 6 is coaxially arranged with the upper ring 2 and has the same size, the lower circular plate 6 is located below the column 3, and the central position on the upper side of the lower circular plate 6 is fixedly connected to the lower end of the column 3. The ring 7 is horizontally arranged, the ring 7 is sleeved on the periphery of the lower circular plate 6, and the ring 7 is coaxially arranged with the upper ring 2.

[0061] There are two calibration probes, namely a first calibration probe and a second calibration probe. The first calibration probe is used to fit on the upper end face of the upper ring 2 of the calibration master gauge and measure the first calibration data. The first calibration measurement data is used to fit the end face runout value of the first calibration plane. The second calibration probe is used to fit on the inner wall surface on the upper side of the upper ring 2 of the calibration master gauge and measure the second calibration data. The second calibration data is used to fit the cylindrical surface runout value of the second calibration surface.

[0062] There are two actual measurement probes, namely a third actual measurement probe and a fourth actual measurement probe. The third actual measurement probe is used to fit on the lower end face of the upper ring 2 of the calibration master gauge and measure the third actual measurement data. The third actual measurement data is used to fit the end face runout value of the third actual measurement plane. The fourth actual measurement probe is used to fit on the inner wall surface on the lower side of the upper ring 2 of the calibration master gauge and measure the fourth actual measurement data. The fourth actual measurement data is used to fit the cylindrical surface runout value of the fourth actual measurement surface.

[0063] When there are two calibration probes, namely a first calibration probe and a second calibration probe, and there are two actual measurement probes, namely a third actual measurement probe and a fourth actual measurement probe, the correction method includes:

[0064] Calculate the flatness of the first calibration plane according to the end face runout value of the first calibration plane, and compare the flatness of the first calibration plane with the preset value of the first calibration plane. When the flatness of the first calibration plane ≥ the preset value of the first calibration plane, perform centering and tilting adjustment on the turntable until the flatness of the first calibration plane < the preset value of the first calibration plane.

[0065] Calculate the roundness of the second calibration surface based on the cylindrical runout value of the second calibration surface, and compare the roundness of the second calibration surface with the preset value of the second calibration surface. When the roundness of the second calibration surface ≥ the preset value of the second calibration surface, perform centering and tilting adjustment on the turntable until the roundness of the second calibration surface < the preset value of the second calibration surface.

[0066] Establish a reference coordinate system using the end face runout value of the first calibration plane and the cylindrical runout value of the second calibration surface.

[0067] Under the reference coordinate system, calculate the flatness of the third measured plane based on the end face runout value of the third measured plane, and compare the flatness of the third measured plane with the preset value of the third measured plane. When the flatness of the third measured plane ≥ the preset value of the third measured plane, perform centering and tilting adjustment on the turntable until the flatness of the third measured plane < the preset value of the third measured plane.

[0068] Under the reference coordinate system, calculate the roundness of the fourth measured surface based on the cylindrical runout value of the fourth measured surface, and compare the roundness of the fourth measured surface with the preset value of the fourth measured surface. When the roundness of the fourth measured surface ≥ the preset value of the fourth measured surface, perform centering and tilting adjustment on the turntable until the roundness of the fourth measured surface < the preset value of the fourth measured surface.

[0069] In addition, when there are two calibration probes, namely the first calibration probe and the second calibration probe, and two measured probes, namely the third measured probe and the fourth measured probe, the third measured probe is also used to fit against the upper end face of the lower ring 7 of the calibration master gauge and measure the fifth measured data, and the fifth measured data is used to fit the end face runout value of the fifth measured plane. The fourth measured probe is also used to fit against the outer wall surface of the lower ring 7 of the calibration master gauge and measure the sixth measured data, and the sixth measured data is used to fit the cylindrical runout value of the sixth measured surface.

[0070] At this time, the calibration method further includes:

[0071] Under the reference coordinate system, calculate the flatness of the fifth measured plane based on the end face runout value of the fifth measured plane, and compare the flatness of the fifth measured plane with the preset value of the fifth measured plane. When the flatness of the fifth measured plane ≥ the preset value of the fifth measured plane, perform centering and tilting adjustment on the turntable until the flatness of the fifth measured plane < the preset value of the fifth measured plane.

[0072] In the reference coordinate system, calculate the roundness of the sixth measured surface according to the cylindrical runout value of the sixth measured surface, and compare the roundness of the sixth measured surface with the preset value of the sixth measured surface. When the roundness of the sixth measured surface ≥ the preset value of the sixth measured surface, perform centering and tilting adjustment on the turntable until the roundness of the sixth measured surface < the preset value of the sixth measured surface.

[0073] In addition, when there are two calibration probes, namely the first calibration probe and the second calibration probe, and there are two measured probes, namely the third measured probe and the fourth measured probe, the third measured probe is also used to fit against the inner wall surface of the groove 4 on the column 3 of the calibration master gauge and measure the seventh measured data, and the seventh measured data is used to fit the cylindrical runout value of the seventh measured surface. The fourth measured probe is also used to fit against the inner wall surface of the lower groove 5 on the column 3 of the calibration master gauge and measure the eighth measured data, and the eighth measured data is used to fit the cylindrical runout value of the eighth measured surface.

[0074] At this time, the calibration method further includes:

[0075] In the reference coordinate system, calculate the roundness of the seventh measured surface according to the cylindrical runout value of the seventh measured surface, and compare the roundness of the seventh measured surface with the preset value of the seventh measured surface. When the roundness of the seventh measured surface ≥ the preset value of the seventh measured surface, perform centering and tilting adjustment on the turntable until the roundness of the seventh measured surface < the preset value of the seventh measured surface.

[0076] In the reference coordinate system, calculate the roundness of the eighth measured surface according to the cylindrical runout value of the eighth measured surface, and compare the roundness of the eighth measured surface with the preset value of the eighth measured surface. When the roundness of the eighth measured surface ≥ the preset value of the eighth measured surface, perform centering and tilting adjustment on the turntable until the roundness of the eighth measured surface < the preset value of the eighth measured surface.

[0077] When the measuring device is calibrated according to the flatness of each plane and the roundness of each surface, it is necessary to calibrate the measuring device according to the coaxiality. At this time, the calibration method further includes:

[0078] Calculate the coaxiality of the second calibration surface according to the cylindrical runout value of the second calibration surface, and compare the coaxiality of the second calibration surface with the preset coaxiality value of the second calibration surface. When the coaxiality of the second calibration surface ≥ the preset coaxiality value of the second calibration surface, perform centering and tilting adjustment on the turntable until the coaxiality of the second calibration surface < the preset coaxiality value of the second calibration surface.

[0079] In the reference coordinate system, calculate the coaxiality of the fourth measured surface according to the cylindrical runout value of the fourth measured surface, and compare the coaxiality of the fourth measured surface with the preset value of the coaxiality of the fourth measured surface. When the coaxiality of the fourth measured surface ≥ the preset value of the coaxiality of the fourth measured surface, perform centering and tilting adjustment on the turntable until the coaxiality of the fourth measured surface < the preset value of the coaxiality of the fourth measured surface.

[0080] At this time, the calibration method may further include:

[0081] In the reference coordinate system, calculate the coaxiality of the seventh measured surface according to the cylindrical runout value of the seventh measured surface, and compare the coaxiality of the seventh measured surface with the preset value of the coaxiality of the seventh measured surface. When the coaxiality of the seventh measured surface ≥ the preset value of the coaxiality of the seventh measured surface, perform centering and tilting adjustment on the turntable until the coaxiality of the seventh measured surface < the preset value of the coaxiality of the seventh measured surface;

[0082] In the reference coordinate system, calculate the coaxiality of the eighth measured surface according to the cylindrical runout value of the eighth measured surface, and compare the coaxiality of the eighth measured surface with the preset value of the coaxiality of the eighth measured surface. When the coaxiality of the eighth measured surface ≥ the preset value of the coaxiality of the eighth measured surface, perform centering and tilting adjustment on the turntable until the coaxiality of the eighth measured surface < the preset value of the coaxiality of the eighth measured surface.

[0083] Embodiment 1

[0084] Measure three times in sequence 1, 2, and 3 to check the repeatability of the measurement. The individual measurement results between the repeat times must be repeated within 0.002 mm and 20°. If the results do not meet the repeatability requirements, clean the calibration master again, confirm that the probe clarity and position are correct, confirm that the tilt and centering deviation have been adjusted, and then repeat the test.

[0085] Record the results of each run, calculate the average value of the results, and compare the calculated average value with the corresponding preset value. Flatness ≤ 0.0005 mm, roundness ≤ 0.0002 mm, coaxiality ≤ 0.002 mm.

[0086] Use the least squares method to fit the data measured on the first calibration plane and the second calibration surface of the calibration master to obtain the end face runout value of the first calibration plane and the cylindrical runout value of the second calibration surface, and establish a reference coordinate system. Then, measure the third measured plane, the fourth measured surface, the fifth measured plane, the sixth measured surface, the seventh measured surface, and the eighth measured surface in sequence, and calibrate the measuring device.

[0087] For the convenience of recording, the upper end face of the upper ring 2 is named as face B, the lower end face of the upper ring 2 is named as face A, the inner wall face on the upper side of the upper ring 2 is named as face C, the inner wall face on the lower side of the upper ring 2 is named as face D, the upper end face of the lower ring 7 is named as face G, the outer wall face of the lower ring 7 is named as face F, the inner wall face of the groove 4 on the column 3 is named as face I, and the inner wall face of the lower groove 5 on the column 3 is named as face J.

[0088] Fit the data measured by the calibration probe and the actual measurement probe, and calculate the flatness and roundness. The specific detailed data are shown in Table 1. Compare the average value of flatness, the average value of roundness, and the average value of coaxiality in Table 1 with the corresponding preset values, and correct the turntable of the measuring device according to the comparison results. Among them, the preset value of flatness is 0.0005 mm, the preset value of roundness is 0.0002 mm, and the preset value of coaxiality is 0.002 mm.

[0089] Table 1 Measurement Data

[0090]

[0091]

[0092] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. Calibration method for a multi-probe measuring device, characterized in that, The measuring device is used to measure the end face runout and cylindrical surface runout of an aero-engine rotor. The measuring device is a measuring device provided with two or more measuring heads. The measuring heads are divided into calibration measuring heads and actual measurement measuring heads. The calibration method of the measuring device consists of the following steps: Place a calibration master gauge with the same preparation structure as the aero-engine rotor at the center position of the turntable of the measuring device, and make the axis of the calibration master gauge coincide with the axis of the turntable. Attach the calibration measuring head to the calibration position of the calibration master gauge, start the turntable and rotate it one week so that the turntable drives the calibration master gauge to rotate. Calibrate the measuring device according to the data measured by the calibration measuring head, and establish a reference coordinate system. Attach the actual measurement measuring head to the actual measurement position of the calibration master gauge, start the turntable and rotate it one week so that the turntable drives the calibration master gauge to rotate. Calibrate the measuring device according to the data measured by the actual measurement measuring head in the reference coordinate system. Both the calibration position and the actual measurement position are any plane or any curved surface of the calibration master gauge. When the measuring device is used to measure the end face runout and radial runout of the rotor of the aero-engine circular arc end tooth connection structure, The calibration master gauge has exactly the same structural dimensions as the rotor of the aero-engine circular arc end tooth connection structure, and includes: The upper circular plate (1), which is horizontally arranged. The upper circular ring (2), which is horizontally arranged and sleeved on the periphery of the upper circular plate (1), and is coaxially arranged with the upper circular ring (2). The column (3), which is vertically arranged and coaxially arranged with the upper circular ring (2), is located below the upper circular plate (1). Its upper end is fixedly connected to the central position on the lower side of the upper circular plate (1), and upper grooves (4) and lower grooves (5) are respectively formed along the outer wall for one week. The lower circular plate (6), which is horizontally arranged and coaxially arranged with the upper circular ring (2) and has the same size, is located below the column (3). The central position on its upper side is fixedly connected to the lower end of the column (3). The lower circular ring (7), which is horizontally arranged and sleeved on the periphery of the lower circular plate (6), and is coaxially arranged with the upper circular ring (2).

2. The calibration method of the multi-probe measurement device according to claim 1, wherein There are two calibration measuring heads, namely the first calibration measuring head and the second calibration measuring head. The first calibration measuring head is used to attach to the upper end face of the upper circular ring (2) of the calibration master gauge and measure the first calibration data. The first calibration measurement data is used to fit the end face runout value of the first calibration plane. The second calibration measuring head is used to attach to the inner wall surface on the upper side of the upper circular ring (2) of the calibration master gauge and measure the second calibration data. The second calibration data is used to fit the cylindrical surface runout value of the second calibration curved surface. There are two actual measurement measuring heads, namely the third actual measurement measuring head and the fourth actual measurement measuring head. The third actual measurement measuring head is used to attach to the lower end face of the upper circular ring (2) of the calibration master gauge and measure the third actual measurement data. The third actual measurement data is used to fit the end face runout value of the third actual measurement plane. The fourth actual measurement measuring head is used to attach to the inner wall surface on the lower side of the upper circular ring (2) of the calibration master gauge and measure the fourth actual measurement data. The fourth actual measurement data is used to fit the cylindrical surface runout value of the fourth actual measurement curved surface. The calibration method includes: Calculate the flatness of the first calibration plane based on the end face runout value of the first calibration plane, and compare the flatness of the first calibration plane with the preset value of the first calibration plane. When the flatness of the first calibration plane ≥ the preset value of the first calibration plane, perform centering and tilting adjustment on the turntable until the flatness of the first calibration plane < the preset value of the first calibration plane. Calculate the roundness of the second calibration surface based on the cylindrical runout value of the second calibration surface, and compare the roundness of the second calibration surface with the preset value of the second calibration surface. When the roundness of the second calibration surface ≥ the preset value of the second calibration surface, perform centering and tilting adjustment on the turntable until the roundness of the second calibration surface < the preset value of the second calibration surface. Establish a reference coordinate system using the end face runout value of the first calibration plane and the cylindrical runout value of the second calibration surface. Under the reference coordinate system, calculate the flatness of the third measured plane based on the end face runout value of the third measured plane, and compare the flatness of the third measured plane with the preset value of the third measured plane. When the flatness of the third measured plane ≥ the preset value of the third measured plane, perform centering and tilting adjustment on the turntable until the flatness of the third measured plane < the preset value of the third measured plane. Under the reference coordinate system, calculate the roundness of the fourth measured surface based on the cylindrical runout value of the fourth measured surface, and compare the roundness of the fourth measured surface with the preset value of the fourth measured surface. When the roundness of the fourth measured surface ≥ the preset value of the fourth measured surface, perform centering and tilting adjustment on the turntable until the roundness of the fourth measured surface < the preset value of the fourth measured surface.

3. The calibration method of the multi-probe measuring device according to claim 2, wherein The third measured probe is further used to fit against the upper end face of the lower ring (7) of the calibration master gauge and measure the fifth measured data, and the fifth measured data is used to fit the end face runout value of the fifth measured plane. The fourth measured probe is further used to fit against the outer wall surface of the lower ring (7) of the calibration master gauge and measure the sixth measured data, and the sixth measured data is used to fit the cylindrical runout value of the sixth measured surface. The calibration method includes: Under the reference coordinate system, calculate the flatness of the fifth measured plane based on the end face runout value of the fifth measured plane, and compare the flatness of the fifth measured plane with the preset value of the fifth measured plane. When the flatness of the fifth measured plane ≥ the preset value of the fifth measured plane, perform centering and tilting adjustment on the turntable until the flatness of the fifth measured plane < the preset value of the fifth measured plane. Under the reference coordinate system, calculate the roundness of the sixth measured surface based on the cylindrical runout value of the sixth measured surface, and compare the roundness of the sixth measured surface with the preset value of the sixth measured surface. When the roundness of the sixth measured surface ≥ the preset value of the sixth measured surface, perform centering and tilting adjustment on the turntable until the roundness of the sixth measured surface < the preset value of the sixth measured surface.

4. The calibration method of the multi-probe measuring device according to claim 3, wherein The third actual measuring probe is also used to fit against the inner wall surface of the groove (4) on the column (3) of the calibration master gauge and measure the seventh actual measurement data, and the seventh actual measurement data is used to fit the cylindricity runout value of the seventh actual measurement surface. The fourth actual measuring probe is also used to fit against the inner wall surface of the lower groove (5) on the column (3) of the calibration master gauge and measure the eighth actual measurement data, and the eighth actual measurement data is used to fit the cylindricity runout value of the eighth actual measurement surface. The calibration method includes: In the reference coordinate system, calculate the roundness of the seventh actual measurement surface according to the cylindricity runout value of the seventh actual measurement surface, and compare the roundness of the seventh actual measurement surface with the preset value of the seventh actual measurement surface. When the roundness of the seventh actual measurement surface ≥ the preset value of the seventh actual measurement surface, perform centering and tilting adjustment on the turntable until the roundness of the seventh actual measurement surface < the preset value of the seventh actual measurement surface. In the reference coordinate system, calculate the roundness of the eighth actual measurement surface according to the cylindricity runout value of the eighth actual measurement surface, and compare the roundness of the eighth actual measurement surface with the preset value of the eighth actual measurement surface. When the roundness of the eighth actual measurement surface ≥ the preset value of the eighth actual measurement surface, perform centering and tilting adjustment on the turntable until the roundness of the eighth actual measurement surface < the preset value of the eighth actual measurement surface.

5. The calibration method of the multi-probe measuring device according to claim 4, characterized in that, The calibration method further includes: Calculate the coaxiality of the second calibration surface according to the cylindricity runout value of the second calibration surface, and compare the coaxiality of the second calibration surface with the preset coaxiality value of the second calibration surface. When the coaxiality of the second calibration surface ≥ the preset coaxiality value of the second calibration surface, perform centering and tilting adjustment on the turntable until the coaxiality of the second calibration surface < the preset coaxiality value of the second calibration surface. In the reference coordinate system, calculate the coaxiality of the fourth actual measurement surface according to the cylindricity runout value of the fourth actual measurement surface, and compare the coaxiality of the fourth actual measurement surface with the preset coaxiality value of the fourth actual measurement surface. When the coaxiality of the fourth actual measurement surface ≥ the preset coaxiality value of the fourth actual measurement surface, perform centering and tilting adjustment on the turntable until the coaxiality of the fourth actual measurement surface < the preset coaxiality value of the fourth actual measurement surface.

6. The calibration method of the multi-probe measuring device according to claim 5, characterized in that, The calibration method further includes: In the reference coordinate system, calculate the coaxiality of the seventh actual measurement surface according to the cylindricity runout value of the seventh actual measurement surface, and compare the coaxiality of the seventh actual measurement surface with the preset coaxiality value of the seventh actual measurement surface. When the coaxiality of the seventh actual measurement surface ≥ the preset coaxiality value of the seventh actual measurement surface, perform centering and tilting adjustment on the turntable until the coaxiality of the seventh actual measurement surface < the preset coaxiality value of the seventh actual measurement surface. In the reference coordinate system, calculate the coaxiality of the eighth actual measurement surface according to the cylindricity runout value of the eighth actual measurement surface, and compare the coaxiality of the eighth actual measurement surface with the preset coaxiality value of the eighth actual measurement surface. When the coaxiality of the eighth actual measurement surface ≥ the preset coaxiality value of the eighth actual measurement surface, perform centering and tilting adjustment on the turntable until the coaxiality of the eighth actual measurement surface < the preset coaxiality value of the eighth actual measurement surface.

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