A device and method for detecting inner and outer diameters of disc shaft and casing parts with compensation

Abstract

This invention discloses a device and method for measuring the inner and outer diameters of disc-type and casing-type parts with compensation, belonging to the field of aero-engine manufacturing. It includes a main board with a fixed-point measurement assembly and a moving-point measurement assembly. The fixed-point measurement assembly includes a first measuring head mounted on the main board. The moving-point measurement assembly includes a linear guide rail, a sliding block, a second measuring head, a grating reading head, and a flexible gauge. The linear guide rail is mounted on the main board and is arranged along its length. The sliding block is mounted on the linear guide rail, which drives the sliding block to move linearly. The second measuring head, the grating reading head, and the flexible gauge are all mounted on the sliding block. The main board also has a grating steel strip arranged along its length. The grating reading head and the grating steel strip are arranged opposite each other. The first measuring head and the second measuring head are arranged sequentially along the length of the main board, and the distance between them and the main board is equal.

Description

Technical Field

[0001] This invention belongs to the field of aero-engine manufacturing technology, specifically relating to a device and method for measuring the inner and outer diameters of disc-type and casing-type parts with compensation. Background Technology

[0002] Typically, aero engines contain rotating parts such as discs and shafts, and casings. During the manufacturing process, the discs and shafts and casings require online inspection to ensure that their machining accuracy meets the requirements, thereby ensuring the high reliability of the aero engine.

[0003] Existing common inspection methods include aluminum plate inspection and standard part inspection. When using aluminum plate measuring tools, a long rod is typically used to transmit displacement. In this case, different measuring forces can introduce measurement errors. Furthermore, dial indicators or micrometers are typically used for reading, which are also prone to reading errors. When using standard parts for inspection, a separate set of standard parts needs to be designed for each part of different sizes and materials, resulting in high costs and inconvenient management. Therefore, there is an urgent need for a high-precision, low-cost device and method for inspecting the inner and outer diameters of disc-shaped and casing-type parts with compensation. Summary of the Invention

[0004] To address the aforementioned problems in the prior art, this invention provides a device and method for detecting the inner and outer diameters of disc-shaped and casing-shaped parts with compensation. The technical problem to be solved by this invention is achieved through the following technical solution: In a first aspect, the present invention provides a device for measuring the inner and outer diameters of disc-shaped and casing-shaped parts with compensation, including a main board, on which a measuring fixed point component and a measuring moving point component are provided; The fixed-point measurement component includes a first measuring head mounted on the main board, and the moving-point measurement component includes a linear guide rail, a sliding block, a second measuring head, an optical grating reading head, and a flexible gauge. The linear guide rail is mounted on the main board and is set along the length of the main board. The sliding block is mounted on the linear guide rail and is used to drive the sliding block to make linear movements. The second measuring head, the optical grating reading head, and the flexible gauge are all mounted on the sliding block. The motherboard is also equipped with a grating steel strip, which is set along the length of the motherboard. The grating reading head and the grating steel strip are set opposite to each other. The first measuring head and the second measuring head are set sequentially along the length of the motherboard and the distance between the two and the motherboard is equal.

[0005] In one embodiment of the present invention, the measuring moving point assembly further includes a first measuring rod and a first support block, the first support block being mounted on a sliding support block, and the two ends of the first measuring rod being connected to the first support block and the second measuring head, respectively.

[0006] In one embodiment of the present invention, the measuring moving point assembly further includes a first positioning block, which is fixedly connected to a sliding support block, and is used to position the second measuring head.

[0007] In one embodiment of the present invention, the measuring positioning assembly further includes a second measuring rod and a second support block, the second support block being mounted on the main board, and the two ends of the second measuring rod being connected to the second support block and the first measuring head, respectively.

[0008] In one embodiment of the present invention, the measurement positioning component further includes a second positioning block, which is fixedly connected to the main board and is used to position the first measuring head.

[0009] In one embodiment of the present invention, the motherboard is further provided with a temperature sensor and a controller. The temperature sensor is used to detect the temperature of the environment in which the motherboard is located. The temperature sensor, the grating reading head, and the flexible gauge are all connected to the controller.

[0010] In one embodiment of the present invention, the motherboard is further provided with a zero-point positioning plate, which is located at one end of the linear guide rail and between the first measuring head and the second measuring head. The zero-point positioning plate is used to provide a mechanical zero point for the measuring moving point assembly.

[0011] In one embodiment of the present invention, the motherboard is further provided with a limiting pin, which is matched with the sliding block for limiting.

[0012] In one embodiment of the present invention, the motherboard is further provided with a grating fixing plate, and the grating steel strip is bonded to the grating fixing plate.

[0013] Secondly, the present invention also provides a method for measuring the inner and outer diameters of disc-shaped and casing-shaped parts with compensation, including the inner and outer diameter compensation measuring device for disc-shaped and casing-shaped parts as described above. The inner and outer diameter compensation measuring device includes a main board, on which a measuring fixed point component and a measuring moving point component are provided. The measuring moving point component includes a linear guide rail, a sliding support block, a second measuring head, a grating reading head, and a flexible gauge. The main board is also provided with a temperature sensor and a controller. The temperature sensor is used to detect the temperature of the environment in which the main board is located. The temperature sensor, the grating reading head, and the flexible gauge are all connected to the controller. The methods include: The controller acquires the displacement of the flexible gauge and the measurement value of the grating reading head. Based on the displacement of the flexible gauge, the measurement value of the grating reading head is corrected to obtain the compensated measurement data. The controller acquires the detection data from the temperature sensor and the measurement value from the grating reading head. Based on the detection data from the temperature sensor, the measurement value from the grating reading head is corrected to obtain the compensated measurement data.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: In the above-described scheme of this application, the inner and outer diameter belt compensation detection device includes a main board, on which a measuring fixed point assembly and a measuring moving point assembly are provided. The measuring fixed point assembly includes a first measuring head mounted on the main board, and the measuring moving point assembly includes a linear guide rail, a sliding block, a second measuring head, a grating reading head, and a flexible gauge. The linear guide rail is mounted on the main board and is arranged along the length direction of the main board. The sliding block is mounted on the linear guide rail, and the linear guide rail is used to drive the sliding block to make linear movements. The second measuring head, the grating reading head, and the flexible gauge are all mounted on the sliding block. The main board is also provided with a grating steel strip, which is arranged along the length direction of the main board. The grating reading head and the grating steel strip are arranged opposite each other. The first measuring head and the second measuring head are arranged sequentially along the length direction of the main board, and the distance between the two and the main board is equal. Using this structure, during measurement, the detection device is first placed on the outer circumferential surface of a disc-shaped part or the inner circumferential surface of a casing-like part. Then, the first measuring head is placed against the surface of the part, and a second measuring head is moved via a linear guide rail, causing the first and second measuring heads to abut against the two sides of the part, respectively. At this point, the number of pulses on the grating steel strip is read by the grating reading head, which yields the displacement of the sliding block. Based on the preset distance between the first and second measuring heads in their initial positions, the distance between them can be determined, thus providing the outer or inner diameter of the part. The displacement of the flexible gauge can detect the magnitude of the measuring force, allowing for correction of the grating detection value based on the gauge's displacement, improving detection efficiency and accuracy. Furthermore, this detection device can be applied to parts of different sizes and materials simultaneously, eliminating the need to design different detection devices for different parts, thereby reducing production costs and expanding the applicability of the detection device.

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] Figure 1 This is a front view of the inner and outer diameter band compensation detection device in an embodiment of the present invention; Figure 2 This is a top view of the inner and outer diameter band compensation detection device in an embodiment of the present invention; Figure 3 This is a side view of the inner and outer diameter band compensation detection device in an embodiment of the present invention.

[0017] Reference numerals: 1-Main board, 2-Measuring positioning component, 21-First measuring head, 22-Second measuring rod, 23-Second support block, 24-Second positioning block, 3-Measuring moving point component, 31-Linear guide rail, 32-Sliding support block, 33-Second measuring head, 34-Grate reading head, 35-Flexible gauge, 36-First measuring rod, 37-First support block, 38-First positioning block, 4-Grate steel strip, 5-Controller, 6-Zero point positioning plate, 7-Limit pin, 8-Grate fixing plate. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to specific embodiments, but the implementation of the present invention is not limited thereto.

[0019] Example 1: Please see Figure 1 , Figure 2 and Figure 3 This invention provides a device for compensating the inner and outer diameters of disc-shaped and casing-shaped parts, including a main board 1. The main board 1 is equipped with a measuring fixed point assembly 2 and a measuring moving point assembly 3. The measuring fixed point assembly 2 includes a first measuring head 21 mounted on the main board 1. The measuring moving point assembly 3 includes a linear guide rail 31, a sliding block 32, a second measuring head 33, a grating reading head 34, and a flexible gauge 35. The linear guide rail 31 is mounted on the main board 1 and is arranged along the length direction of the main board 1. The sliding block 32 is mounted on the linear guide rail 31 and is used to drive the sliding block 32 to make linear movements. The second measuring head 33, the grating reading head 34, and the flexible gauge 35 are all mounted on the sliding block 32. The main board 1 is also equipped with a grating steel strip 4, which is arranged along the length direction of the main board 1. The grating reading head 34 and the grating steel strip 4 are arranged opposite each other. The first measuring head 21 and the second measuring head 33 are arranged sequentially along the length direction of the main board 1 and the distance between them and the main board 1 is equal.

[0020] In some embodiments of this application, during measurement, the first measuring head 21 is fixed relative to the motherboard 1, while the second measuring head 33 moves under the action of the linear guide rail 31, thereby adjusting the distance between the first measuring head 21 and the second measuring head 33.

[0021] In some embodiments of this application, the linear guide 31 includes guide rails and a sliding seat. There are two guide rails, which are installed parallel to each other on the main board 1. The sliding seat is installed on the guide rails and slides with them.

[0022] In some embodiments of this application, the center of the grating reading head 34 is aligned with the grating steel strip 4 to ensure that the grating reading head 34 can read the number of pulses of the grating steel strip 4.

[0023] In some embodiments of this application, the sliding block 32 is fastened to the sliding seat of the linear guide rail 31 by screws.

[0024] In some embodiments of this application, the flexible gauge 35 is an existing sensor or mechanical element that utilizes the principle of flexible deformation to measure minute displacements or forces. The side head of the flexible gauge 35 and the second measuring head 33 are the same side head, which can move in one direction with a displacement of 0.5 mm. When detecting the inner and outer diameters of a part, the magnitude of the measuring force can be controlled by the displacement of the flexible gauge 35, and then the grating detection value can be corrected through displacement compensation.

[0025] In the above-described scheme of this application, the inner and outer diameter belt compensation detection device includes a main board 1, on which a measuring fixed point assembly 2 and a measuring moving point assembly 3 are provided; the measuring fixed point assembly 2 includes a first measuring head 21 mounted on the main board 1, and the measuring moving point assembly 3 includes a linear guide rail 31, a sliding block 32, a second measuring head 33, a grating reading head 34, and a flexible gauge 35. The linear guide rail 31 is mounted on the main board 1 and is arranged along the length direction of the main board 1. The sliding block 32 is mounted on the linear guide rail 31 and is used to drive the sliding block 32 to make linear movements. The second measuring head 33, the grating reading head 34, and the flexible gauge 35 are all mounted on the sliding block 32; the main board 1 is also provided with a grating steel strip 4, which is arranged along the length direction of the main board 1. The grating reading head 34 and the grating steel strip 4 are arranged opposite each other. The first measuring head 21 and the second measuring head 33 are arranged sequentially along the length direction of the main board 1 and the distance between the two and the main board 1 is equal. With this structure, during measurement, the detection device is first placed on the outer circumferential surface of a disc-shaped part or the inner circumferential surface of a casing-like part. Then, the first measuring head 21 is placed against the surface of the part, and the second measuring head 33 is moved by the linear guide rail 31, causing the first measuring head 21 and the second measuring head 33 to respectively abut against the two side surfaces of the part. At this time, the number of pulses on the grating steel strip 4 is read by the grating reading head 34, which yields the displacement of the sliding block 32. Based on the preset distance between the first measuring head 21 and the second measuring head 33 in their initial positions, the distance between the first measuring head 21 and the second measuring head 33 can be determined, thus revealing the outer or inner diameter of the part. The displacement of the flexible gauge 35 can detect the magnitude of the measuring force, allowing for correction of the grating detection value based on the displacement of the flexible gauge 35, thereby improving detection efficiency and accuracy. Furthermore, the detection device of this application can be applied to parts of different sizes and materials simultaneously, eliminating the need to design different detection devices for different parts, thus reducing production costs and increasing the applicability of the detection device.

[0026] In some embodiments of this application, such as Figure 1 and Figure 3As shown, the measuring moving point assembly 3 also includes a first measuring rod 36 and a first support block 37. The first support block 37 is mounted on the sliding support block 32, and the two ends of the first measuring rod 36 are connected to the first support block 37 and the second measuring head 33, respectively. With this structure, the first support block 37 serves as a connecting transition between the sliding support block 32 and the second measuring head 33, and can stably bear and transmit the installation force of the first measuring rod 36 and the measuring head, so that the second measuring head 33 maintains a consistent posture during its movement along the linear guide rail 31. The length and installation position of the first measuring rod 36 can be flexibly adjusted according to the spatial requirements of the measuring head, which is convenient for adapting to the measurement range of parts of different sizes. At the same time, it makes the transmission path of the measuring force more direct, reduces deformation or gaps caused by intermediate links, and helps to improve the consistency and repeatability of position detection.

[0027] In some embodiments of this application, the first support block 37 is fastened to the sliding support block 32 by a cylindrical pin and a hexagonal set screw.

[0028] In some embodiments of this application, such as Figure 1 and Figure 3 As shown, the measuring moving point assembly 3 also includes a first positioning block 38, which is fixedly connected to the sliding support block 32. The first positioning block 38 is used to position the second measuring head 33. With this structure, the fixed connection between the first positioning block 38 and the sliding support block 32 provides a definite installation reference and constraint position for the second measuring head 33 on the sliding support block 32, ensuring the measuring head remains stable during assembly and use, and preventing displacement caused by vibration or external forces. This positioning structure helps to standardize the initial posture of the probe during each measurement, reducing measurement deviations caused by inconsistent installation. It also facilitates quick restoration of the original assembly relationship during maintenance or probe replacement, contributing to consistent measurement over long-term use.

[0029] In some embodiments of this application, such as Figure 1 and Figure 3 As shown, the measurement positioning assembly 2 also includes a second measuring rod 22 and a second support block 23. The second support block 23 is mounted on the main board 1, and the two ends of the second measuring rod 22 are connected to the second support block 23 and the first measuring head 21, respectively. With this structure, the second support block 23 serves as a mounting base between the main board 1 and the first measuring head 21, firmly supporting the first measuring head 21 at a predetermined height and position, keeping it fixed during measurement and providing a reliable reference point for the entire inspection. The length and installation angle of the second measuring rod 22 can be adapted to the size and shape of the part being measured, enabling the first measuring head 21 to accurately contact measurement surfaces with different curvatures or depths. Simultaneously, the rigid connection transmits contact force, reducing errors introduced by structural deformation and improving the stability and repeatability of the positioning measurement.

[0030] In some embodiments of this application, the second support block 23 is fastened to the main board 1 by a cylindrical pin and a hexagonal set screw.

[0031] In some embodiments of this application, such as Figure 1 and Figure 3 As shown, the measurement positioning component 2 also includes a second positioning block 24, which is fixedly connected to the main board 1. The second positioning block 24 is used to position the first measuring head 21. With this structure, the fixed connection of the second positioning block 24 to the main board 1 provides a definite installation position and directional constraint for the first measuring head 21, ensuring that the measuring head maintains a fixed spatial posture after assembly and avoiding positional changes caused by vibration or accumulated assembly errors during use. This positioning method ensures that the first measuring head 21 is in the same reference position during each measurement, which is beneficial for forming a stable relative relationship with the measuring moving point component 3, reducing systematic errors caused by reference point drift, and also facilitating the rapid restoration of the original measurement reference after equipment maintenance or component replacement, maintaining long-term consistency in the testing process.

[0032] In some embodiments of this application, such as Figure 1 and Figure 2 As shown, the motherboard 1 also includes a temperature sensor and a controller 5. The temperature sensor detects the temperature of the environment in which the motherboard 1 is located. The temperature sensor, the grating reading head 34, and the flexibility gauge 35 are all connected to the controller 5. With this structure, the temperature sensor can detect real-time temperature changes in the environment in which the motherboard 1 is located and transmit the temperature signal to the controller 5. The controller 5 simultaneously receives the measurement data from the grating reading head 34 and the displacement signal from the flexibility gauge 35, thus incorporating temperature variables into the overall measurement system. This allows the system to correct the grating measurement value based on real-time temperature data when calculating part dimensions, compensating for errors caused by thermal expansion and contraction due to changes in ambient or material temperature. This makes the measurement results closer to the actual dimensions of the part at standard temperatures, which is beneficial for maintaining the accuracy and comparability of the test results under different environmental conditions.

[0033] In some embodiments of this application, the controller 5 is mainly an electronic processing module that performs a series of operations such as demodulation, amplification, conversion, processing and display of the displacement signal of the flexible gauge 35, the reading signal of the grating reading head 34 and the temperature signal of the temperature sensor, thereby realizing the digitalization of part inspection.

[0034] In some embodiments of this application, such as Figure 1 and Figure 2As shown, the main board 1 also has a zero-point positioning plate 6, which is located at one end of the linear guide rail 31 and between the first measuring head 21 and the second measuring head 33. The zero-point positioning plate 6 provides a mechanical zero point for the measuring moving point assembly 3. With this structure, the zero-point positioning plate 6 is fixed as a physical entity at a predetermined position on the main board 1, between the first measuring head 21 and the second measuring head 33, providing a clear and repeatable mechanical reference point for the moving slide of the measuring moving point assembly 3. This allows the measuring moving point assembly 3 to accurately zero itself by contacting the positioning plate before each measurement, establishing a unified displacement starting reference. The zero point determined in this mechanical way reduces system deviations introduced by electronic drift or reset errors, ensuring that the displacement measured by the grating reading head 34 has a consistent reference origin, thereby improving the consistency and reliability of measurement results across multiple measurements and between different operators.

[0035] In some embodiments of this application, the temperature sensor and controller 5 can realize measurement compensation for parts of different materials under different temperature detection environments.

[0036] In some embodiments of this application, the zero-point positioning plate 6 is fastened to the main board 1 with bolts.

[0037] In some embodiments of this application, the final measured dimension of the part is the sum of the positional distance between two measuring points at the mechanical zero point and their relative displacement.

[0038] In some embodiments of this application, such as Figure 1 and Figure 2 As shown, the main board 1 is also equipped with a limit pin 7, which engages with the sliding block 32. With this structure, the limit pin 7 provides a physical barrier boundary for the travel of the sliding block 32 on the linear guide rail 31, preventing it from sliding out of the effective working range of the guide rail due to inertia or accidental operation. This limiting engagement constrains the endpoint of the sliding block 32's movement, preventing collisions or excessive displacement between the measuring moving point assembly 3 and other parts of the device, thus protecting precision components such as the grating reading head 34 and the flexible gauge 35 from mechanical damage. Simultaneously, the fixed position of the limit pin 7 helps maintain the movement of the measuring moving point assembly 3 within a safe range, ensuring stable starting and ending positions for each measurement, which is beneficial for standardized operation and long-term reliability of the device.

[0039] In some embodiments of this application, the motherboard 1 is provided with a pin hole, and the limiting pin 7 is tightly fitted into the pin hole.

[0040] In some embodiments of this application, such as Figure 1 and Figure 3As shown, the main board 1 also has a grating fixing plate 8, to which the grating steel strip 4 is bonded. With this structure, the grating fixing plate 8 provides the main board 1 with a flat and stable dedicated mounting surface, and the grating steel strip 4 is fixed thereon by bonding. This ensures that the grating steel strip 4 remains straight and fixed in position along its length, avoiding twisting or undulation of the steel strip that might be caused by unevenness or stress deformation of the main board 1 surface if directly bonded. The stable attachment of the grating steel strip 4 provides a highly consistent scale reference for the grating reading head 34, reducing measurement errors caused by deformation or displacement of the steel strip itself, and helping to ensure the accuracy and long-term stability of the grating measurement system across the entire measurement range.

[0041] In some embodiments of this application, the grating fixing plate 8 is fastened to the main board 1 by bolts.

[0042] Example 2: Secondly, the present invention also provides a method for measuring the inner and outer diameters of disc-shaped and casing-shaped parts with compensation, including the inner and outer diameter compensation measuring device for disc-shaped and casing-shaped parts as described above. The inner and outer diameter compensation measuring device includes a main board, on which a measuring fixed point component and a measuring moving point component are provided. The measuring moving point component includes a linear guide rail, a sliding support block, a second measuring head, a grating reading head, and a flexible gauge. The main board is also provided with a temperature sensor and a controller. The temperature sensor is used to detect the temperature of the environment in which the main board is located. The temperature sensor, the grating reading head, and the flexible gauge are all connected to the controller. The methods include: The controller acquires the displacement of the flexible gauge and the measurement value of the grating reading head. Based on the displacement of the flexible gauge, the measurement value of the grating reading head is corrected to obtain the compensated measurement data. The controller acquires the detection data from the temperature sensor and the measurement value from the grating reading head. Based on the detection data from the temperature sensor, the measurement value from the grating reading head is corrected to obtain the compensated measurement data.

[0043] The beneficial effects of Embodiment 2 and its various implementations of the present invention can be found in the analysis of the beneficial effects of Embodiment 1 and its various implementations, and will not be repeated here.

[0044] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0046] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0047] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A device for detecting the inner and outer diameters of disc-type and casing-type parts with compensation, characterized in that, Includes a motherboard, on which a fixed-point measurement component and a moving-point measurement component are provided; The fixed-point measurement assembly includes a first measuring head mounted on the main board. The moving-point measurement assembly includes a linear guide rail, a sliding block, a second measuring head, an optical grating reading head, and a flexible gauge. The linear guide rail is mounted on the main board and is arranged along the length direction of the main board. The sliding block is mounted on the linear guide rail and is used to drive the sliding block to make linear movements. The second measuring head, the optical grating reading head, and the flexible gauge are all mounted on the sliding block. The motherboard is also provided with a grating steel strip, which is arranged along the length of the motherboard. The grating reading head and the grating steel strip are arranged opposite to each other. The first measuring head and the second measuring head are arranged sequentially along the length of the motherboard and the distance between them and the motherboard is equal.

2. The device for detecting the inner and outer diameters of disc-type and casing-type parts with compensation according to claim 1, characterized in that, The measuring moving point assembly further includes a first measuring rod and a first support block. The first support block is mounted on the sliding support block, and the two ends of the first measuring rod are respectively connected to the first support block and the second measuring head.

3. The device for detecting the inner and outer diameters of disc-type and casing-type parts with compensation according to claim 2, characterized in that, The measuring moving point assembly further includes a first positioning block, which is fixedly connected to the sliding support block. The first positioning block is used to position the second measuring head.

4. The device for detecting the inner and outer diameters of disc-type and casing-type parts with compensation according to claim 1, characterized in that, The measurement positioning assembly further includes a second measuring rod and a second support block. The second support block is mounted on the main board, and the two ends of the second measuring rod are respectively connected to the second support block and the first measuring head.

5. The inner and outer diameter compensation detection device for disc-type and casing-type parts according to claim 4, characterized in that, The measurement positioning component further includes a second positioning block, which is fixedly connected to the main board and is used to position the first measuring head.

6. The device for detecting the inner and outer diameters of disc-type and casing-type parts with compensation according to claim 1, characterized in that, The motherboard is also equipped with a temperature sensor and a controller. The temperature sensor is used to detect the temperature of the environment in which the motherboard is located. The temperature sensor, the grating reading head, and the flexible gauge are all connected to the controller.

7. The device for detecting the inner and outer diameters of disc-type and casing-type parts with compensation according to claim 1, characterized in that, The motherboard is also provided with a zero-point positioning plate, which is located at one end of the linear guide rail and between the first measuring head and the second measuring head. The zero-point positioning plate is used to provide a mechanical zero point for the measuring moving point assembly.

8. The device for detecting the inner and outer diameters of disc-type and casing-type parts with compensation according to claim 1, characterized in that, The motherboard is also provided with a limiting pin, which cooperates with the sliding block for limiting.

9. The device for detecting the inner and outer diameters of disc-type and casing-type parts with compensation according to claim 1, characterized in that, The motherboard is also provided with a grating fixing plate, and the grating steel strip is bonded to the grating fixing plate.

10. A method for detecting the inner and outer diameters of disc-type and casing-type parts with compensation, characterized in that, The device includes an inner and outer diameter compensation detection device for disc-type and casing-type parts as described in any one of claims 1-9. The inner and outer diameter compensation detection device includes a main board, on which a measuring fixed point assembly and a measuring moving point assembly are provided. The measuring moving point assembly includes a linear guide rail, a sliding support block, a second measuring head, a grating reading head, and a flexible gauge. The main board is also provided with a temperature sensor and a controller. The temperature sensor is used to detect the temperature of the environment in which the main board is located. The temperature sensor, the grating reading head, and the flexible gauge are all connected to the controller. The method includes: The controller acquires the displacement of the flexible gauge and the measurement value of the grating reading head. Based on the displacement of the flexible gauge, the measurement value of the grating reading head is corrected to obtain the compensated measurement data. The controller acquires the detection data from the temperature sensor and the measurement value from the grating reading head. Based on the detection data from the temperature sensor, the measurement value from the grating reading head is corrected to obtain compensated measurement data.

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