Four-point cylindricity measurement method based on singularity rate analysis

Abstract

The present invention discloses a four-point cylindricity measurement method based on singularity rate analysis. The method comprises the steps of: measuring multi-circle measurement signals collectedthrough axial three-sectional four sensors to obtain the shape of the section of a measured cylinder and shafting runout and mixed signals of straight line error motion of a measurement rack; according to a prior section shape signal period, employing the singular value decomposition method to obtain fundamental wave signals, and performing singularity rate spectral analysis for residual signalsto measure the section runout period; and employing addition of measurement signals of diametrical sensors and a sequence vector three-point straightness error separation method to remove various error motions in the measurement process to obtain an actual section shape and obtain relative radius, the unrounded degree and the least-squares centre vector of each section circle, and fitting and measuring the space bending middle line of the measured cylinder to achieve measurement reconstruction of the silhouette of the cylinder defined based on the international standard. The number of the sensors is small, the antijamming capability is high, and the measurement system is simple in structure.

Description

technical field

[0001] The invention relates to the field of precision testing technology and the design and manufacture of large-scale in-situ measurement equipment, in particular to a four-point cylindricity measurement method based on singularity analysis for large-scale cylinder cylindricity measurement. Background technique

[0002] Large-scale precision shaft rollers are the core components used in the production of large-scale solar panels, ship and automobile steel plates, LCD screens, high-quality paper, etc. in the fields of new energy, ships, ships, papermaking, and mining. The length of several meters, the accuracy of its profile, that is, errors such as cylindricity errors will be copied to the products produced, which are important factors that determine the surface quality of products. Therefore, the shape detection accuracy of large-scale shaft parts marks the technical level of a country's high-end equipment manufacturing industry and the international compe...

Examples

Embodiment Construction

[0052] In this example, if figure 2 As shown, a four-point cylindricity measurement method based on singularity analysis, the measurement frame (8) can move in the Y-Z direction under the joint support of the Z guide rail (7) and the Y guide rail (9); the supporting shaft system (5 ) supports and drives the object under test (6) to rotate; the Z guide rail (7) is parallel to the axial direction of the object under test (6); at the beginning of the measurement, the measuring frame (8) is approached along the Y direction under the support of the Y guide rail (9) The measured object 6 moves into the position measurement along the Z direction under the support of the Z guide rail (7), and the moving step distance of the measuring frame (8) along the Z direction is d; The multi-turn measurement signals collected are obtained from the mixed signals of the measured cylindrical cross-section shape, the shaft runout and the linear error motion of the measuring frame. Carry out singul...

technical field

[0001] The invention relates to the field of precision testing technology and the design and manufacture of large-scale in-situ measurement equipment, in particular to a four-point cylindricity measurement method based on singularity analysis for large-scale cylinder cylindricity measurement. Background technique

[0002] Large-scale precision shaft rollers are the core components used in the production of large-scale solar panels, ship and automobile steel plates, LCD screens, high-quality paper, etc. in the fields of new energy, ships, ships, papermaking, and mining. The length of several meters, the accuracy of its profile, that is, errors such as cylindricity errors will be copied to the products produced, which are important factors that determine the surface quality of products. Therefore, the shape detection accuracy of large-scale shaft parts marks the technical level of a country's high-end equipment manufacturing industry and the international compe...

Examples

Embodiment Construction

[0052] In this example, if figure 2 As shown, a four-point cylindricity measurement method based on singularity analysis, the measurement frame (8) can move in the Y-Z direction under the joint support of the Z guide rail (7) and the Y guide rail (9); the supporting shaft system (5 ) supports and drives the object under test (6) to rotate; the Z guide rail (7) is parallel to the axial direction of the object under test (6); at the beginning of the measurement, the measuring frame (8) is approached along the Y direction under the support of the Y guide rail (9) The measured object 6 moves into the position measurement along the Z direction under the support of the Z guide rail (7), and the moving step distance of the measuring frame (8) along the Z direction is d; The multi-turn measurement signals collected are obtained from the mixed signals of the measured cylindrical cross-section shape, the shaft runout and the linear error motion of the measuring frame. Carry out singul...

Images