Rotational symmetry incomplete spherical surface roundness measuring tool and use method

Abstract

The invention relates to a roundness measuring tool for a rotationally symmetrical incomplete spherical surface and a use method, aims at the sphericity forming particularity of rotationally symmetrical incomplete spherical surface parts, realizes the accurate detection and judgment of the spherical precision of the parts through the roundness error of cross sections of equatorial circles which pass through the center of a sphere and have a deflection angle as large as possible, and belongs to the technical field of bearing detection. The tool comprises a workbench base, an angle adjusting mechanism, an angle locking mechanism and a sliding workbench. The tool comprises a roundness measuring instrument workbench, a microdrum, a mandrel, a measuring rod and the like. Through cooperation of a rough adjusting knob and a microdrum in the angle adjusting mechanism, rapid and precise adjustment of the inclination angle and the sphere center position of a workpiece is achieved, a roundness detection section which envelops a sphere error as much as possible is determined, and it is ensured that a center shaft of a roundness instrument can accurately penetrate through the sphere center of the workpiece; the tool provided by the invention is compact in structure, flexible in adjustment and high in measurement precision, and overcomes the limitation that a traditional roundness instrument can only perform horizontal measurement.

Description

Technical Field

[0001] The present invention relates to the technical field of bearing detection, and in particular to a professional roundness measurement tool and a method for using the same, and specifically to a rotationally symmetric non-holosphere roundness measurement tool and a method for using the same. Background Art

[0002] As an important parameter for characterizing the geometric accuracy of rotationally symmetrical parts, roundness has extensive and critical applications in high-end manufacturing fields such as aerospace, automotive manufacturing, precision machinery, and bearings. However, traditional roundness measurement methods for bearing parts are mostly based on the horizontal placement of the workpiece. The workpiece is rotated by the rotating platform of the roundness meter, and the measuring rod is used to collect the contour changes of a certain section, and the roundness error of the measured section is evaluated accordingly. Traditional roundness meters are difficult to directly adapt to the roundness measurement and evaluation of spherical measurement sections with tilted equatorial sections of the spherical surface of the part. In particular, for the detection of spherical errors of rotationally symmetrical non-complete spheres, the measurement capability is limited when measuring tilted sections that pass through the center of the sphere or non-equatorial sections.

[0003] In view of this, how to provide a roundness measurement tool that has a compact structure, strong adjustability, and high measurement accuracy for multi-angle measurement and analysis of roundness has become a technical problem that needs to be urgently solved in the existing technology. Summary of the Invention

[0004] The present invention is dedicated to overcoming the deficiencies of the prior art and provides a multi-angle measurement and analysis roundness meter fixture with compact structure, strong adjustability and high measurement accuracy, as well as a spherical error detection method for rotationally symmetric non-holospheres.

[0005] In one aspect, the present invention provides a rotationally symmetric non-holosphere roundness measurement tool, comprising: The roundness meter workbench is used to provide a basic support platform, has an angle dial, and can rotate around the center axis of the roundness meter workbench; A workbench base is mounted on the roundness meter workbench, the central axis of the workbench base coincides with the central axis of the roundness meter workbench, and can rotate along the central axis driven by the roundness meter workbench; An angle adjustment mechanism, mounted on the workbench base, for adjusting the tilt angle of the workpiece being measured; Angle locking mechanism, used to lock or release the angle adjustment mechanism; A sliding workbench is mounted on the upper portion of the angle adjustment mechanism and is slidable; A differential cylinder is connected to the sliding table and is used to precisely adjust the lateral position of the sliding table; The mandrel is mounted on the sliding table and is used to mount the workpiece to be measured; A measuring rod is provided with a measuring head, contacts the surface of the section to be measured of the workpiece and transmits a measuring signal, and is used to measure the roundness of the workpiece; Among them, the coordinated adjustment of the angle adjustment mechanism and the differential cylinder enables the central axis of the roundness instrument workbench to accurately pass through the center of the sphere of the workpiece to be measured.

[0006] Optionally, a positioning pin is provided between the workbench base and the roundness instrument workbench to ensure the alignment of the central axis of the workbench base and the roundness instrument workbench.

[0007] Optionally, the angle adjustment mechanism is provided with a rough adjustment knob, which is used in combination with the differential cylinder to realize the combined adjustment of large angles and micro displacements.

[0008] Optionally, the angle locking mechanism adopts a quick locking structure for quickly loosening the structure, enabling the angle adjustment mechanism to adjust the tilt angle of the workpiece to be measured, or, after the angle adjustment mechanism adjusts the tilt angle of the workpiece to be measured, quickly locking the angle adjustment mechanism.

[0009] Optionally, the differential cylinder is a spiral structure with a function of fine adjustment accuracy.

[0010] Optionally, the mandrel and the sliding workbench adopt a detachable connection structure, which is convenient for replacing workpieces to be measured with different specifications.

[0011] Optionally, the workpiece to be measured is a rotationally symmetric non-complete spherical surface part.

[0012] Optionally, the sliding workbench is provided with a guide rail system to ensure smooth movement during the adjustment of the differential cylinder and avoid position deviation.

[0013] Optionally, the measuring rod is connected to the measuring system of the roundness instrument, which can automatically collect and transmit measurement data for measuring and recording the roundness of the sphere passing through the center of the workpiece to be measured.

[0014] Optionally, the measuring system connected to the measuring rod includes data recording and fitting software, which can draw a polar coordinate diagram and automatically calculate the roundness error.

[0015] On the other hand, the present invention provides a method for using the roundness measurement tooling for rotationally symmetric non-complete spherical surfaces, specifically a method for measuring and discriminating the spherical error of rotationally symmetric non-complete spherical surfaces based on the roundness measurement tooling for rotationally symmetric non-complete spherical surfaces, including: Install the workpiece to be measured on the mandrel, and adjust the tilt angle and lateral position of the workbench through the angle adjustment mechanism and the differential cylinder so that the central axis of the roundness instrument workbench passes through the center of the sphere of the workpiece to be measured; Adjust the measuring rod to make it contact with the cross-section to be measured of the workpiece to be measured to complete the initial positioning; Drive the roundness instrument workbench to rotate, so that the workpiece to be measured rotates synchronously with the roundness instrument workbench, and the measuring rod synchronously collects the radial displacement data of each point of the cross-section to be measured during the rotation process; The measuring system records the change in the radial displacement of each point on the cross-section to be measured of the workpiece under test during rotation; Calculate the difference between the maximum value and the minimum value in the recorded data as the roundness error value of the cross-section to be measured; The analysis system draws the polar coordinate roundness diagram of the workpiece under test and analyzes the direction and distribution of the errors.

[0016] A roundness measuring tooling and usage method for a rotationally symmetric non-integral spherical surface provided by the present invention. The tooling has a compact structure, strong adjustability, and high measurement accuracy, and can effectively solve the technical bottleneck that traditional roundness meters can only measure horizontal cross-sections and are difficult to adapt to non-centered or inclined cross-section measurements; the tooling realizes the rapid adjustment and micron-level precise control of the inclination angle of the workpiece through an angle adjustment mechanism provided with a combination of a rough adjustment knob and a high-precision differential cylinder, and greatly improves the adjustment efficiency and angle stability through a quick locking mechanism; the mandrel and the sliding workbench adopt a detachable connection structure, which is convenient for replacing workpieces of different specifications and improves the versatility of the system; in cooperation with the guide rail system and the automated measurement system, it realizes the precise roundness analysis of the measurement cross-section of the workpiece under test under the installation requirement of the inclination angle, and can automatically record data, draw a polar coordinate diagram and calculate the roundness error, thereby greatly improving the measurement accuracy, operation convenience and data processing efficiency of the rotationally symmetric non-integral spherical surface spherical error, and meeting the diverse and high-precision requirements for the roundness measurement of complex workpieces in high-end fields such as aerospace, automobile manufacturing, and precision machinery. Description of the Drawings

[0017] This specification sets forth a complete and enabling disclosure of the present application to those skilled in the art, including its best mode. This specification refers to the accompanying drawings, in which: Figure 1 is a schematic structural diagram of a roundness measuring tooling for a rotationally symmetric non-integral spherical surface provided by an embodiment of the present invention. Detailed Embodiment

[0018] Reference will now be made in detail to embodiments of the present application, and one or more examples of the embodiments of the present application will be illustrated in the drawings. Each example is provided for the purpose of explaining the present application and not for limiting the present application. In fact, those skilled in the art will clearly understand that various modifications and variations can be made to the present application without departing from the scope or spirit of the present application. For example, features described or illustrated as part of one embodiment can be used in conjunction with another embodiment to produce yet another embodiment. As used in this specification, the terms "first", "second", etc. can be used interchangeably to distinguish one component from another without intending to indicate the position or importance of each component. As used in the specification, unless the context clearly indicates otherwise, the terms "a", "an", "the", and "said" are intended to mean the presence of one or more elements. The terms "comprising", "including", and "having" are intended to be inclusive and mean that there may be other elements in addition to the listed elements.

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] Figure 1 The following is a schematic structural diagram of a rotary symmetric non-integral spherical roundness measurement tooling provided for the embodiments of the present invention, as Figure 1 shown, the tooling includes: A roundness instrument workbench 1, which is used to provide a basic support platform, is provided with an angle scale and can rotate around the central axis of the roundness instrument workbench 1; A workbench base 2 is installed on the roundness instrument workbench 1. The central axis of the workbench base 2 coincides with the central axis of the roundness instrument workbench 1 and can rotate along the axis under the drive of the roundness instrument workbench 1; An angle adjustment mechanism 3 is installed on the workbench base 2 and is used to adjust the inclination angle of the workpiece 6 to be measured; An angle locking mechanism 8 is used to lock or release the angle adjustment mechanism 3; A sliding workbench 4 is installed on the upper part of the angle adjustment mechanism 3 and can slide; A differential cylinder 9 is connected to the sliding workbench 4 and is used to precisely adjust the lateral position of the sliding workbench 4; A mandrel 7 is installed on the sliding workbench and is used to install the workpiece 6 to be measured; wherein, the workpiece 6 to be measured is a rotary symmetric non-integral spherical part.

[0021] The measuring rod 5 is provided with a measuring head, which contacts the surface of the cross-section to be measured of the workpiece 6 to be measured and transmits a measuring signal, and is used for measuring the roundness of the workpiece 6 to be measured. Among them, the cooperative adjustment of the angle adjustment mechanism 3 and the differential cylinder 9 enables the central axis of the roundness instrument workbench 1 to accurately pass through the center of the sphere of the workpiece 6 to be measured.

[0022] The rotationally symmetric non-integral spherical surface roundness measurement tooling provided by the present invention realizes the following remarkable technical effects through a carefully designed structural combination, especially the cooperative use of the angle adjustment mechanism and the differential cylinder: First, the measurement axis is accurately passed through the center of the sphere, improving the accuracy of roundness measurement: The angle of the workpiece is roughly adjusted by the angle adjustment mechanism 3, and the sliding workbench 4 is precisely adjusted laterally at the micron level in cooperation with the differential cylinder 9, so that the center of the sphere of the workpiece 6 installed on the mandrel 7 coincides precisely with the central axis of the roundness instrument workbench 1, thereby ensuring that the measurement axis passes through the center of the sphere and meeting the roundness measurement requirements of complex cross-sections to be measured.

[0023] Second, it supports different-angle measurements, expanding the measurement adaptability and flexibility: The workbench base 2 can rotate around the central axis with the roundness instrument workbench 1, and any inclination angle can be set through the angle adjustment mechanism, so that the measurement is not limited to the horizontal cross-section, but can be adapted to the roundness error analysis of spherical bodies and any inclined cross-sections, significantly expanding the applicable range of the roundness instrument.

[0024] Third, it improves the measurement centering efficiency and reduces manual operation errors: The central axis of the workbench base 2 and the central axis of the roundness instrument workbench 1 are designed to be strictly coaxial, ensuring that the entire platform always moves around a fixed center during the rotation process. Combining with the high-precision position adjustment ability of the differential cylinder, the workpiece centering process can be quickly completed, reducing manual repeated calibration and improving the measurement efficiency and repeatability accuracy.

[0025] Fourth, the measurement process is stable and reliable, avoiding the interference of contact errors: After the angle setting is completed, the angle is rigidly locked by the angle locking mechanism 8 to avoid measurement deviation caused by angle drift. At the same time, the connection between the sliding workbench and the differential cylinder is stable, and the adjustment process is smooth, effectively avoiding interference phenomena such as jumping and displacement during the process of the measuring rod 5 contacting the workpiece.

[0026] Fifth, the structure is compact and the operation is convenient, suitable for actual industrial scenario applications: Each component is compact and reasonable in spatial layout, and the angle adjustment and fine adjustment mechanisms are integrated in an integrated platform, which is convenient for users to quickly clamp the workpiece and set the measurement position, improving the overall operability and on-site applicability of the equipment.

[0027] In one embodiment, a positioning pin shaft (not shown in the figure) is provided between the workbench base 2 and the roundness instrument workbench 1 to ensure the alignment of the central axes of the workbench base 2 and the roundness instrument workbench 1. This structure avoids eccentricity caused by installation errors, thereby improving the accuracy of roundness measurement.

[0028] In one embodiment, the angle adjustment mechanism 3 is provided with a coarse adjustment knob, which cooperates with the differential cylinder 9 to achieve combined adjustment of large angles and micro displacements. By rotating this knob, the adjustment module can be driven to rotate within a large range to quickly set the initial tilt angle of the workpiece 6 to be measured. The coarse adjustment structure is usually linked to the rotating shaft through a gear or worm mechanism and has the characteristics of simple structure and rapid response. The differential cylinder 9 is installed on the fine movement unit of the angle adjustment mechanism and adopts a screw propulsion structure, with high linear propulsion accuracy and anti-backlash performance. After the coarse adjustment is completed, the operator can rotate the differential cylinder to perform fine control of the angular displacement at the micron level for the final precise setting of the tilt angle of the workpiece to be measured. The rotation process of the differential cylinder realizes angle fine adjustment through a small pitch thread and is equipped with scale markings to assist visual reading. In addition, to ensure the stability of the entire adjustment process, a friction damping and limit structure is provided inside the angle adjustment mechanism, which can effectively avoid the mechanical impact generated during the coarse adjustment from affecting the fine adjustment result.

[0029] In one embodiment, the angle locking mechanism 8 adopts a quick locking structure for quick release, enabling the angle adjustment mechanism 3 to adjust the tilt angle of the workpiece 6 to be measured. After the angle adjustment mechanism 3 adjusts the tilt angle of the workpiece 6 to be measured, the angle adjustment mechanism 3 is quickly locked. When it is necessary to adjust the tilt angle of the workpiece to be measured, the user only needs to easily operate the unlocking mechanism to flexibly adjust the angle adjustment mechanism; after the adjustment is completed, the set angle can be firmly locked through the quick locking mechanism to ensure that the adjustment accuracy does not shift due to equipment vibration or misoperation. This technical solution solves the problems of traditional locking mechanisms such as cumbersome adjustment steps, unstable locking, and the need to use tools, effectively improving the operation convenience, measurement preparation efficiency, and angle stability during the measurement process, and is particularly suitable for high-precision measurement scenarios that require frequent angle fine adjustment and repositioning.

[0030] In one embodiment, the differential cylinder 9 is of a spiral structure and has the function of fine adjustment accuracy.

[0031] In one embodiment, the mandrel 7 and the sliding workbench 4 adopt a detachable connection structure, which is convenient for replacing workpieces 6 of different specifications.

[0032] In one embodiment, the workpiece 6 to be measured is a non-complete spherical rotationally symmetric part.

[0033] In one embodiment, the sliding workbench 4 is provided with a guide rail system to ensure smooth movement during the adjustment of the micrometer barrel and avoid position deviation.

[0034] In one embodiment, the measuring rod 5 is connected to the measuring system of the roundness instrument (not shown in the figure), which can automatically collect and transmit measurement data for measuring and recording the roundness of the sphere passing through the center of the workpiece 6 to be measured. The roundness errors of the cross-sections passing through the center of the sphere and forming multiple different angles with the equatorial cross-section are measured, and the maximum roundness error value is taken as the spherical error. Specifically, when measuring the spherical error, data on the surface of the sphere are usually obtained through a series of cross-sections passing through the center of the sphere at different angles. Each cross-section represents the shape of the sphere in a different orientation. In actual operation, the following several methods can be selected for cross-section measurement: The equatorial cross-section is located in the central plane of the sphere and is usually one of the most critical cross-sections. Measuring the error of the equatorial cross-section can provide basic information about the shape of the sphere. In addition to the equatorial cross-section, the sphere needs to be cut at multiple different angles, such as 0°, 22.5°, 45°, 60°, 90°, etc. After obtaining the measurement data, the roundness of each cross-section needs to be fitted and the roundness error calculated. Specifically, the difference between the fitted circle and the actual measurement points is used to obtain the roundness error value of each cross-section. Finally, among all the measured cross-sections, the maximum roundness error is selected as the spherical error. Usually, this maximum value reflects the shape deviation of the sphere.

[0035] In one embodiment, the measuring system connected to the measuring rod 5 includes data recording and fitting software, which can draw a polar coordinate diagram and automatically calculate the roundness error of the measurement cross-section as the spherical error caused by the inconsistency of the spherical surface profiles of the part's equator and the cross-section of the sphere passing through the center and perpendicular to the equatorial circle.

[0036] The present invention also provides a method for using the above-mentioned roundness measurement tooling for a rotationally symmetric non-complete spherical surface, including: Step 11: Mount the workpiece 6 to be measured on the mandrel 7, and adjust the tilt angle and lateral position of the workbench through the angle adjustment mechanism 3 and the micrometer barrel 9 so that the central axis of the roundness instrument workbench 1 passes through the center of the sphere of the workpiece 6 to be measured; Step 12: Adjust the measuring rod 5 to make it contact the cross-section to be measured of the workpiece 6 to be measured to complete the initial positioning; Step 13: Drive the roundness instrument workbench 1 to rotate so that the workpiece 6 to be measured rotates synchronously with the roundness instrument workbench 1, and the measuring rod 5 synchronously collects the radial displacement data of each point on the cross-section to be measured during the rotation process; Step 14: Record the change amount of the radial displacement of each point on the cross-section to be measured of the workpiece 6 to be measured during the rotation process through the measuring system; Step 15: Calculate the roundness error value of the measurement cross-section by the least squares method; Step 16: Analyze the system to draw the polar coordinate roundness diagram of the workpiece 6 to be measured and analyze the direction and distribution of the errors.

[0037] Step 17: After measuring a certain cross-section of the workpiece 6 to be measured, the user can continue to adjust the angle adjustment mechanism to a new inclination angle and repeat the above measurement steps. By collecting the roundness errors of cross-sections at multiple different angles, a complete roundness error distribution map of the spherical part can be more accurately constructed in three-dimensional space, realizing the precise evaluation of the overall geometric accuracy of the sphere.

[0038] In one embodiment, during the measurement process, the roundness instrument workbench 1 rotates at a constant low speed to avoid the phenomenon of probe bounce or data jitter caused by high rotational speed, thereby improving the stability and repeatability of data collection. This measure ensures that the measurement system can stably respond to each angular displacement during the entire rotation cycle, and the data more truly reflects the change of the workpiece contour.

[0039] In one embodiment, a high-precision displacement sensor is used to record the radial change data of the probe in real time. The information collected by the sensor will be synchronously transmitted to the data processing module or computer system for subsequent roundness error calculation and fitting analysis, ensuring the automation and high efficiency of the entire measurement process.

[0040] In one embodiment, the least squares method is used to fit a theoretical circle to the collected radial data points, and the difference between the maximum deviation and the minimum deviation is used as the roundness error value.

[0041] In one embodiment, to improve the measurement stability and traceability, the initial contact point coordinates of the probe 5 are recorded before each measurement and verified after the measurement to prevent measurement deviation caused by sliding error or installation disturbance, and improve the consistency of the measurement process.

[0042] In one embodiment, the computer system converts the measured data into a polar coordinate diagram for display, reflecting the directional and periodic characteristics of the roundness error, which helps to analyze the sources of manufacturing errors, such as spindle eccentricity of the machine tool, fixture deformation, etc., and guides the subsequent process optimization.

[0043] In one embodiment, this method is applicable to a variety of precision parts with spherical center geometric features, such as spherical shells, spherical sockets, spherical bearings, etc. In the measurement of such workpieces to be measured, traditional methods often have difficulty in reflecting the spherical error of the entire sphere, or it is impossible to ensure the coincidence of the spherical center and the rotation axis for obliquely placed parts like putty, while this method effectively solves this problem through the platform structure design and fine-tuning mechanism, and has broad engineering application prospects.

[0044] The description of the present invention has been given for purposes of illustration and description, and is not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the invention and its practical application, and to enable others of ordinary skill in the art to understand the invention and design various embodiments with various modifications suitable for the particular use.

[0045] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A rotational symmetry non-integral spherical roundness measurement tooling, characterized in that Comprising: A roundness instrument workbench (1) for providing a basic support platform, with an angle dial and capable of rotating around the central axis of the roundness instrument workbench (1); A workbench base (2) installed on the roundness instrument workbench (1), the central axis of the workbench base (2) coinciding with the central axis of the roundness instrument workbench (1), and capable of rotating along the central axis driven by the roundness instrument workbench (1); An angle adjustment mechanism (3) installed on the workbench base (2) for adjusting the tilt angle of the workpiece to be measured (6); An angle locking mechanism (8) for locking or releasing the angle adjustment mechanism (3); A sliding workbench (4) installed on the upper part of the angle adjustment mechanism (3) and capable of sliding; A differential cylinder (9) connected to the sliding workbench (4) for precisely adjusting the lateral position of the sliding workbench (4); A mandrel (7) installed on the sliding workbench (4) for installing the workpiece to be measured (6); A measuring rod (5) provided with a measuring head, contacting the surface of the cross-section of the workpiece to be measured (6) and transmitting a measurement signal for measuring the roundness of the workpiece to be measured (6); Wherein, the coordinated adjustment of the angle adjustment mechanism (3) and the differential cylinder (9) enables the central axis of the roundness instrument workbench (1) to precisely pass through the center of the sphere of the workpiece to be measured (6).

2. The roundness measurement tooling for a rotationally symmetric non-complete spherical surface according to claim 1, wherein A positioning pin is provided between the workbench base (2) and the roundness instrument workbench (1) to ensure the alignment of the central axes of the workbench base (2) and the roundness instrument workbench (1).

3. The roundness measurement tooling for a rotationally symmetric non-integral spherical surface according to claim 1, wherein The angle adjustment mechanism (3) is provided with a rough adjustment knob to cooperate with the differential cylinder (9) to achieve combined adjustment of large angles and micro displacements.

4. The roundness measurement tooling for a rotationally symmetric non-complete spherical surface according to claim 1, wherein The angle locking mechanism (8) adopts a quick locking structure for quickly releasing the structure, enabling the angle adjustment mechanism (3) to adjust the tilt angle of the workpiece to be measured, After the angle adjustment mechanism (3) adjusts the tilt angle of the workpiece to be measured, quickly lock the angle adjustment mechanism (3).

5. The roundness measurement tooling for a rotationally symmetric non-integral spherical surface according to claim 1, characterized in that, The differential cylinder (9) is of a spiral structure and has the function of fine adjustment accuracy.

6. The roundness measurement tooling for a rotationally symmetric non-complete spherical surface according to claim 1, characterized in that, The mandrel (7) and the sliding workbench (4) adopt a detachable connection structure to facilitate the replacement of workpieces to be measured (6) of different specifications.

7. The rotational symmetry non-integral spherical surface roundness measurement tooling according to claim 1, characterized in that The workpiece to be measured (6) is a rotationally symmetric non-complete spherical surface part.

8. The roundness measurement tooling for a rotationally symmetric non-complete spherical surface according to claim 1, characterized in that, The sliding workbench (4) is provided with a guide rail system to ensure smooth movement during the adjustment of the differential cylinder and avoid position deviation.

9. The roundness measurement tooling for a rotationally symmetric non-integral spherical surface according to claim 1, characterized in that, The measuring rod (5) is connected to the measuring system of the roundness instrument, and can automatically collect and transmit measurement data for measuring and recording the roundness through the center of the sphere of the workpiece to be measured (6); And / or The measuring system connected to the measuring rod (5) includes data recording and fitting software, which can draw a polar coordinate diagram and automatically calculate the roundness error.

10. A method for using a rotationally symmetric non-integral spherical roundness measurement tooling as described in any one of claims 1-9, characterized in that, Comprising: Install the workpiece to be measured (6) on the mandrel (7), and adjust the tilt angle and lateral position of the workbench through the angle adjustment mechanism (3) and the differential cylinder (9) so that the central axis of the roundness instrument workbench (1) passes through the center of the sphere of the workpiece to be measured (6); Adjust the measuring rod (5) to make it contact the cross-section to be measured of the workpiece to be measured (6) to complete the initial positioning; Drive the rotation of the roundness instrument workbench (1) so that the workpiece under test (6) rotates synchronously with the roundness instrument workbench (1), and the measuring rod (5) synchronously collects the radial displacement data of each point on the cross-section to be measured during the rotation process; Record the change in the radial displacement of each point on the cross-section to be measured of the workpiece under test (6) during the rotation process through the measurement system; Calculate the difference between the maximum value and the minimum value in the recorded data as the roundness error value of the cross-section to be measured; The analysis system draws the polar coordinate roundness diagram of the workpiece under test (6) and analyzes the direction and distribution of the errors.

Images