Flange flatness measuring device and measuring method

Abstract

The invention discloses a flange flatness measuring method and device, and belongs to the technical field of industrial equipment. According to the flange flatness measurement method, the flatness of a to-be-measured surface of a to-be-measured piece is measured, firstly, the flatness of a supporting surface is measured and calibrated by using a laser sensor, and the calibrated supporting surface is a reference surface for subsequent measurement, so that the influence of the supporting surface on a measurement result is weakened; the to-be-measured piece is placed on the supporting surface, and the to-be-measured surface is arranged upwards, so that the laser sensor can measure the to-be-measured surface; and finally, measuring the flatness of the to-be-measured surface by using a laser sensor, and judging whether the to-be-measured surface meets the mounting requirement or not. According to the measurement method, the influence of the supporting surface flatness on the flange flatness measurement result is weakened, and the accuracy of flange flatness measurement is improved.

Description

[0001] This application is a divisional application of the Chinese application with application number 202111275019.3, application date October 29, 2021, and invention name “A flange measurement method and measuring device”. Technical Field

[0002] The present invention relates to the technical field of industrial equipment, and in particular to a flange flatness measuring method and a measuring device. Background Art

[0003] In different actual working conditions, different flange installation positions have different requirements for flange flatness. For example, when manufacturing a wind turbine tower, the flatness of the flange connecting two adjacent cylinders must be less than or equal to 2mm, but the flatness of the flange connecting the cylinder and the wind turbine servo seat must be less than or equal to 0.35mm. Therefore, it is necessary to measure the flatness of the flange to determine whether the flange meets the installation requirements.

[0004] At present, the flange flatness is measured by placing a laser sensor above the flange surface to be measured. However, the result of the flatness measurement process is affected by the flatness of the support surface on which the flange is placed, thereby reducing the accuracy of the flange flatness measurement.

[0005] Therefore, it is urgent to provide a flange flatness measurement method and a measuring device to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to provide a flange flatness measurement method and a measuring device, which solves the problem that the measurement result of the flange flatness is easily affected by the flatness of the supporting surface on which the flange is placed, and improves the accuracy of the flange flatness measurement.

[0007] In order to achieve the above objectives, the following technical solutions are provided:

[0008] A flange flatness measurement method comprises the following steps:

[0009] S1. Use a laser sensor to measure and calibrate the flatness of the supporting surface of the load-bearing platform;

[0010] S2, placing the piece to be tested on the supporting surface of the carrying platform, with the surface to be tested of the piece to be tested facing upward;

[0011] S3. Taking the support surface as a reference surface, using the laser sensor to measure the flatness of the surface to be measured, and determining whether the surface to be measured meets the installation requirements.

[0012] As an optional solution of the above flange flatness measurement method, step S1 further includes the following steps:

[0013] S11, selecting a plurality of first points to be measured on the support surface to measure the flatness of the support surface;

[0014] S12. If the measured value of the flatness of the supporting surface is equal to the first preset value, the measured value of the laser sensor needs to be reset to zero; otherwise, the flatness of the supporting surface needs to be corrected until the flatness of the supporting surface is equal to the first preset value.

[0015] As an optional solution of the above flange flatness measurement method, step S3 also includes the following steps:

[0016] S31, selecting a plurality of second test points on the surface to be tested to measure the flatness of the surface to be tested;

[0017] S32. If the measured value of the flatness of the surface to be measured is equal to the second preset value, the surface to be measured is qualified; otherwise, the surface to be measured is unqualified.

[0018] As an optional solution of the above flange flatness measurement method, the method further includes the following steps:

[0019] S41, the carrying platform returns to the initial position, and the measured object is removed from the carrying platform;

[0020] S42, repeating step S2 and step S3 to measure the flatness of the test surface of another test piece.

[0021] A measuring device, applied to the above flange flatness measuring method, comprising:

[0022] A carrying platform, wherein a receiving groove is provided on the carrying platform, a supporting surface is provided in the receiving groove, the supporting surface is used to support the piece to be tested, and the surface to be tested of the piece to be tested is arranged upward;

[0023] The laser sensor is arranged above the carrying platform and can measure the flatness of the surface to be measured by taking the supporting surface as a reference surface.

[0024] As an optional solution of the above-mentioned measuring device, it also includes a carrying plate for carrying the test piece, the carrying plate can be arranged on the carrying platform, and the carrying platform is also provided with a clamping assembly for clamping the carrying plate.

[0025] As an optional solution of the above-mentioned measuring device, two clamping assemblies are provided, and the two clamping assemblies are respectively used to clamp two ends of the carrying plate.

[0026] As an optional scheme of the above-mentioned measuring device, the supporting platform includes a first plate and a second plate arranged at intervals in the vertical direction, and the supporting plate is arranged on the first plate; the clamping assembly includes a clamping member and a driving member, and the clamping member includes a first component and a second component, the first component is rotatably arranged at either end of the first plate, and the driving member is arranged between the first plate and the second plate, one end of the second component is rotatably connected to the output end of the driving member, and the other end is rotatably connected to one end of the first component, and the driving member is used to drive the second component away from or close to the supporting platform.

[0027] As an optional solution of the above-mentioned measuring device, it also includes a casing and an adjustment component, the adjustment component is arranged in the casing, the supporting platform is arranged at the output end of the adjustment component, and the adjustment component is used to adjust the relative position between the test piece and the laser sensor.

[0028] As an optional scheme of the above-mentioned measuring device, the adjustment component includes a first module and a second module, the driving direction of the first module is a first direction, and the supporting platform is arranged at the output end of the first module; the driving direction of the second module is a second direction, and the first module is arranged at the output end of the second module; the first direction and the second direction are arranged vertically in a horizontal plane.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The present invention provides a flange flatness measurement method, which measures the flatness of the surface to be tested of the workpiece to be tested, first uses a laser sensor to measure and calibrate the flatness of the support surface, and the calibrated support surface is the reference surface for subsequent measurements, thereby weakening the influence of the support surface on the measurement result; then the workpiece to be tested is placed on the support surface, and the surface to be tested is set upward to facilitate the laser sensor to measure the surface to be tested; finally, the laser sensor is used to measure the flatness of the surface to be tested to determine whether the surface to be tested meets the installation requirements. The above measurement method weakens the influence of the support surface flatness on the flange flatness measurement result and improves the accuracy of flange flatness measurement.

[0031] A measuring device provided by the present invention is applied to the above flange plane measurement method, comprising a bearing platform and a laser sensor, wherein a receiving groove is provided on the bearing platform, a supporting surface is provided in the receiving groove, the supporting surface is used to support the workpiece to be measured, and the measured surface of the workpiece to be measured is arranged upward. The laser sensor is arranged above the bearing platform, and can measure the flatness of the measured surface with the supporting surface as the reference surface, thereby reducing the influence of the flatness of the supporting surface on the flange flatness measurement result and improving the accuracy of the flange flatness measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1Schematic diagram of the structure of the flange flatness measuring device in an embodiment of the present invention;

[0033] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0034] Figure 3 It is an assembly diagram of the carrying platform and the clamping assembly in an embodiment of the present invention;

[0035] Figure 4 is a flow chart of a measurement method in an embodiment of the present invention;

[0036] Figure 5 is a flow chart of step S1 in an embodiment of the present invention;

[0037] Figure 6 Flow chart of step S3 in the embodiment of the present invention.

[0038] Reference numerals:

[0039] 1. Load-bearing platform; 2. Clamping assembly; 3. Adjustment assembly; 4. Laser sensor; 5. Auxiliary slide rail; 6. Working platform;

[0040] 11. first plate; 111. bearing plate; 12. second plate;

[0041] 21. Clamping member; 211. First member; 212. Second member; 22. Driving member;

[0042] 31. First module; 32. Second module;

[0043] 61. Support frame. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0045] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0047] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0048] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0050] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0051] In actual working conditions, the flatness requirements of flanges installed in different positions are different. In order to determine whether the flange meets the installation requirements at the installation position, the flatness of the flange needs to be measured. However, the measurement result of the flange flatness is easily affected by the supporting surface on which the flange is placed, thereby reducing the accuracy of the flange flatness measurement. Figure 1-Figure 3 As shown, this embodiment provides a flange flatness measurement method and a measurement device to solve the above-mentioned problem.

[0052] refer to Figure 1 The measuring device relates to the technical field of industrial equipment, and includes a carrying platform 1 and a laser sensor 4. The carrying platform 1 is provided with a receiving groove, and the receiving groove is provided with a supporting surface, and the supporting surface is used to support the object to be measured, and the surface to be measured of the object to be measured is arranged upward. The laser sensor 4 is arranged above the carrying platform 1, and can measure the flatness of the surface to be measured with the supporting surface as a reference surface, thereby reducing the influence of the flatness of the supporting surface on the flange flatness measurement result and improving the accuracy of the flange flatness measurement.

[0053] Combination Figure 2 Optionally, the measuring device includes a carrying plate 111 for carrying the piece to be measured, and the carrying plate 111 can be arranged on the carrying platform 1 to place the piece to be measured on the carrying platform 1. The carrying platform 1 is also provided with a clamping assembly 2 for clamping the carrying plate 111 to ensure that the position of the piece to be measured on the carrying platform 1 is fixed, so as to avoid the reduction of measurement accuracy due to the displacement of the piece to be measured during the measurement process. The setting of the carrying plate 111 avoids direct contact between the clamping assembly 2 and the piece to be measured, and avoids damage to the piece to be measured by the clamping assembly 2. Furthermore, a through groove is provided on the carrying plate 111, and the piece to be measured can be arranged in the through groove to enable the carrying of the piece to be measured by the carrying plate 111. The setting of the through groove enables the supporting surface to pass through the carrying plate 111 to support the piece to be measured.

[0054] Further optionally, two clamping assemblies 2 are provided, and the two clamping assemblies 2 are respectively used to clamp the two ends of the carrier plate 111, so that the two ends of the carrier plate 111 are subjected to balanced force, avoiding one end of the carrier plate 111 from tilting due to pressure difference, thereby ensuring the accuracy of measurement.

[0055] Specifically, Figure 3As shown, the carrying platform 1 includes a first plate 11 and a second plate 12 spaced apart in the vertical direction, the carrying plate 111 is arranged on the first plate 11, the clamping assembly 2 includes a clamping member 21 and a driving member 22, the clamping member 21 includes a first component 211 and a second component 212, the first component 211 is rotatably arranged at either end of the first plate 11, the driving member 22 is arranged between the first plate 11 and the second plate 12, one end of the second component 212 is rotatably connected to the output end of the driving member 22, and the other end is rotatably connected to one end of the first component 211, and the driving member 22 is used to drive the second component 212 away from or close to the carrying platform 1, so as to achieve the abutment or separation of the free end of the first component 211 from the carrying plate 111. When the second component 212 is driven by the driving member 22 to move in a direction away from the carrying platform 1, one end of the first component 211 will move in a direction away from the carrying platform 1 accordingly, so that the first component 211 rotates relative to the first plate 11. During the rotation of the first component 211 relative to the first plate 11, one end of the first component 211 will move along an arc-shaped trajectory, while driving the second component 212 to rotate relative to the output end of the driving member 22, and the free end of the first component 211 will approach the bearing plate 111 until it abuts against the bearing plate 111. Further, the first component 211 is connected to the first plate 11 through a first rotating shaft to realize the rotation connection between the first component 211 and the first plate 11. The rotating end of the first component 211 is connected to one end of the second component 212 through a second rotating shaft to realize the rotation connection between the first component 211 and the second component 212. The other end of the second component 212 is connected to the output end of the driving member 22 through a third rotating shaft to realize the rotation connection between the second component 212 and the output end of the driving member 22. Further optionally, the free end of the first component 211 is a hook structure, which is convenient for abutting the bearing plate 111. Further optionally, the driving member 22 is a cylinder, and a gas pipe joint is provided on the carrying platform 1, and the gas pipe joint connects the external gas source and the cylinder to provide power for the cylinder to move. Further optionally, a throttle valve is also provided on the carrying platform 1, and the throttle valve is provided on the pipeline connecting the cylinder and the external gas source to adjust the movement speed of the cylinder.

[0056] Further optionally, a positioning column is provided on the first plate 11 and a positioning hole is provided on the carrying plate 111. The positioning column can penetrate the positioning hole to achieve rapid positioning and guiding of the carrying plate 111 on the carrying platform 1, thereby improving measurement efficiency.

[0057] Since three points are required to determine a plane, in order to ensure the accuracy of positioning, further optionally, a plurality of positioning posts are provided, and the positioning holes are provided in a one-to-one correspondence with the positioning posts. In this embodiment, four positioning posts are provided.

[0058] Optionally, the flange flatness measuring device further includes a housing and an adjustment component 3, wherein the adjustment component 3 is disposed in the housing, and the carrying platform 1 is disposed at the output end of the adjustment component 3, and the adjustment component 3 is used to adjust the relative position between the workpiece to be measured and the laser sensor 4. The setting of the adjustment component 3 enables the laser sensor 4 to select multiple measurement points on the workpiece to be measured for measurement, so as to improve the accuracy of the measurement. On the other hand, the workpiece to be measured can be kept away from the laser sensor 4, so as to facilitate the replacement of the workpiece to be measured and to measure another workpiece to be measured.

[0059] Specifically, the adjustment component 3 includes a first module 31 and a second module 32. The driving direction of the first module 31 is a first direction (i.e., the X direction in the figure), and the carrying platform 1 is arranged at the output end of the first module 31; the driving direction of the second module 32 is a second direction (i.e., the Y direction in the figure), and the first module 31 is arranged at the output end of the second module 32; the first direction and the second direction are arranged vertically in a horizontal plane. The specific structure of the adjustment component 3 enables the DUT to change its position in the first direction and the second direction to adjust the relative position between the DUT and the laser sensor 4.

[0060] Further optionally, the flange plane measuring device further comprises an auxiliary slide rail 5, the auxiliary slide rail 5 extends along the second direction, and the first module 31 can be slidably arranged on the auxiliary slide rail 5. The provision of the auxiliary slide rail 5 improves the stability of the first module 31 during the movement along the second direction.

[0061] Further optionally, the auxiliary slide rail 5 includes a slide rail body and a slider, the slide rail body is arranged in the housing along the second direction, the slider is slidably arranged on the slide rail body, and the first module 31 is connected to the slider to realize the sliding of the first module 31 on the auxiliary slide rail 5.

[0062] Further optionally, the housing includes a box body and a protective cover. Specifically, an electric control box is arranged in the box body for controlling the movement of each component in the flange flatness measuring device.

[0063] Further optionally, a fan is provided on the side wall of the box body to circulate air inside and outside the box body, thereby reducing the temperature inside the box body and improving the safety of the flange flatness measuring device. Specifically, a plurality of fans are provided, and the more fans there are, the higher the safety of the flange flatness measuring device. In this embodiment, two fans are provided on the side wall of the box body, and the two fans are spaced apart in the vertical direction.

[0064] Further optionally, a plurality of supporting feet are provided at the bottom end of the box body to ensure stable placement of the housing on the ground.

[0065] Further optionally, a working platform 6 is provided at the top of the box, and a protective cover is used to cover the working platform 6, and the adjustment component 3 and the auxiliary slide rail 5 are both arranged on the working platform 6. Further optionally, a buffer pad is provided between the working platform 6 and the box to buffer the impact force exerted on the box during the measurement process and prevent the box from being damaged. Specifically, the buffer pad is a U-force rubber pad. In the present embodiment, four buffer pads are provided, and the four buffer pads are respectively arranged at the four corners of the working platform 6. Further optionally, a support frame 61 is provided on the workbench, and the laser sensor 4 is arranged on the support frame 61. The provision of the protective cover prevents the adjustment component 3, the bearing platform 1 and the laser sensor 4 from being disturbed by the external environment, which ensures the accuracy of the measurement results on the one hand, and protects the safety of each component on the other hand, thereby extending the life of the flange flatness measuring device.

[0066] Further optionally, a display is provided on the protective cover, and the display is communicatively connected with the laser sensor 4 to display the measurement result of the surface to be measured, so that the staff can obtain the measurement result in time.

[0067] Optionally, the protective cover is provided with an opening so that the staff can replace the workpiece to be measured through the opening. Optionally, a grating is provided at the opening, and the grating is communicatively connected to the electric control box. When the grating is blocked during the measurement process, the electric control box stops urgently, thereby improving the safety during the measurement process.

[0068] Further optionally, an emergency stop switch is provided on the protective cover, and the emergency stop switch is communicatively connected to the electric control box, so that in an emergency, the operation of the flange flatness measuring device can be quickly stopped, thereby improving the safety during the measurement process.

[0069] Further optionally, two starting switches connected in series are provided on the protective cover, and both starting switches are communicatively connected to the electric control box. Only when both starting switches are connected can the flange flatness measuring device be started, thereby avoiding the situation where the flange flatness measuring device is accidentally started due to accidental touching of the switch.

[0070] Further optionally, a USB interface is provided on the protective cover for connecting to an external terminal for information transmission.

[0071] This embodiment also provides a measurement method, using the flange flatness measurement device to measure the workpiece to be measured. Figure 4-Figure 6 4 is a flow chart of the measurement method in this embodiment.

[0072] like Figure 4 As shown, the measurement method includes the following steps:

[0073] S1. Use the laser sensor 4 to measure and calibrate the flatness of the support surface of the carrying platform 1. The calibrated support surface is the reference surface for subsequent measurements, thereby reducing the influence of the support surface on the measurement results.

[0074] S2, placing the piece to be tested on the supporting surface of the carrier plate platform 1, with the surface to be tested of the piece to be tested facing upward, so that the laser sensor 4 can measure the surface to be tested.

[0075] S3. Use the laser sensor 4 to measure the flatness of the surface to be measured to determine whether the surface to be measured meets the installation requirements. The commonly used measurement method directly measures the flatness of the surface to be measured, and the measurement result is easily affected by the flatness of the support surface supporting the surface to be measured, which reduces the accuracy of the measurement. However, the above measurement method first measures and calibrates the flatness of the support surface, and then uses the calibrated support surface as the reference surface for subsequent measurements, which weakens the influence of the support surface flatness on the flange flatness measurement result and improves the accuracy of the flange flatness measurement.

[0076] refer to Figure 5 Optionally, step S1 further includes the following steps:

[0077] S11. Select multiple first points to be measured on the support surface to measure the flatness of the support surface; select multiple first points to be measured and perform repeated measurements to improve the accuracy of the support surface flatness measurement.

[0078] S12, if the measured value of the flatness of the support surface is equal to the first preset value, the measured value of the laser sensor 4 needs to be reset to zero, that is, the subsequent measurement process uses the support surface as the reference surface. Otherwise, it means that the flatness of the support surface does not meet the measurement requirements, and the flatness of the support surface needs to be corrected until the flatness of the support surface is equal to the first preset value.

[0079] In this embodiment, there are four first test points, and the first preset value is 0.005 mm. The number of the first test points and the size of the first preset value are determined according to the actual working conditions, and are not fixed, so no excessive restrictions are made here.

[0080] refer to Figure 6 Optionally, step S3 further includes the following steps:

[0081] S31, selecting a plurality of second points to be measured on the surface to be measured to measure the flatness of the surface to be measured; selecting a plurality of second points to be measured to perform repeated measurements further improves the accuracy of the flatness measurement of the surface to be measured.

[0082] S32: If the measured value of the flatness of the surface to be measured is equal to the second preset value, it means that the flatness of the surface to be measured meets the installation requirements and the surface to be measured is qualified. Otherwise, it means that the flatness of the surface to be measured does not meet the installation requirements and the surface to be measured is unqualified.

[0083] In this embodiment, eight second test points are provided, and the second preset value is 0.004 mm. The number of the second test points and the size of the second preset value are determined according to the actual working conditions, and are not fixed, and are not restricted too much here.

[0084] Reference again Figure 4 Optionally, the measuring method further comprises the steps of:

[0085] S41 , the carrying platform 1 returns to the initial position, and the measured object is removed from the carrying platform 1 . The return of the carrying platform 1 can be achieved by the adjustment component 3 .

[0086] S42, repeating step S2 and step S3 to measure the flatness of the test surface of another test piece.

[0087] Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A flange flatness measurement method, characterized in that: The steps include: S1. Using a laser sensor (4) to measure and calibrate the flatness of the support surface of the carrying platform (1); S2, placing the piece to be tested on the support surface of the carrying platform (1), with the surface to be tested of the piece to be tested facing upwards; S3, taking the support surface as a reference surface, using the laser sensor (4) to measure the flatness of the surface to be measured, and judging whether the surface to be measured meets the installation requirements; S41, the carrying platform (1) returns to the initial position, and the measured object is removed from the carrying platform (1); S42, repeating step S2 and step S3 to measure the flatness of the surface to be tested of another piece to be tested; Wherein, the support surface is located below the laser sensor (4), and the surface to be measured is located between the support surface and the laser sensor (4); Step S1 also includes the following steps: S11, selecting a plurality of first points to be measured on the support surface to measure the flatness of the support surface; S12. If the measured value of the flatness of the support surface is equal to the first preset value, the measured value of the laser sensor (4) needs to be reset to zero; otherwise, the flatness of the support surface needs to be corrected until the flatness of the support surface is equal to the first preset value.

2. The flange flatness measurement method according to claim 1, characterized in that: Step S3 also includes the following steps: S31, selecting a plurality of second test points on the surface to be tested to measure the flatness of the surface to be tested; S32. If the measured value of the flatness of the surface to be measured is equal to the second preset value, the surface to be measured is qualified; otherwise, the surface to be measured is unqualified.

3. A measuring device, characterized in that: The flange flatness measurement method as claimed in any one of claims 1 to 2 comprises: A carrying platform (1), wherein the carrying platform (1) is provided with a receiving groove, wherein a supporting surface is provided in the receiving groove, wherein the supporting surface is used to support the object to be tested, and the surface to be tested of the object to be tested is arranged to face upwards; The laser sensor (4) is arranged above the bearing platform (1) and can measure the flatness of the surface to be measured using the supporting surface as a reference surface.

4. The measuring device according to claim 3, characterized in that It also comprises a carrying plate (111) for carrying the test piece, the carrying plate (111) can be arranged on the carrying platform, and the carrying platform (1) is also provided with a clamping assembly (2) for clamping the carrying plate (111).

5. The measuring device according to claim 4, characterized in that Two clamping assemblies (2) are provided, and the two clamping assemblies (2) are used to clamp two ends of the carrying plate (111) respectively.

6. The measuring device according to claim 5, characterized in that The bearing platform (1) comprises a first plate (11) and a second plate (12) which are arranged at intervals in a vertical direction, and the bearing plate (111) is arranged on the first plate (11); the clamping assembly (2) comprises a clamping member (21) and a driving member (22), and the clamping member (21) comprises a first component (211) and a second component (212), the first component (211) is rotatably arranged at either end of the first plate (11), and the driving member (22) is arranged between the first plate (11) and the second plate (12), one end of the second component (212) is rotatably connected to the output end of the driving member (22), and the other end is rotatably connected to one end of the first component (211), and the driving member (22) is used to drive the second component (212) to move away from or close to the bearing platform (1).

7. The measuring device according to claim 3, characterized in that It also comprises a casing and an adjustment component (3), wherein the adjustment component (3) is arranged in the casing, the carrying platform (1) is arranged at the output end of the adjustment component (3), and the adjustment component (3) is used to adjust the relative position between the object to be tested and the laser sensor (4).

8. The measuring device according to claim 7, characterized in that The adjustment component (3) comprises a first module (31) and a second module (32); the driving direction of the first module (31) is a first direction, and the bearing platform (1) is arranged at the output end of the first module (31); the driving direction of the second module (32) is a second direction, and the first module (31) is arranged at the output end of the second module (32); the first direction and the second direction are arranged perpendicularly in a horizontal plane.

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