Method for rapidly evaluating perpendicularity of axle hole part based on single datum plane

Abstract

The invention belongs to the field of precision metrology and computer application, is a method for evaluating an axle hole part by combining the virtual gauge with the measuring data in the form of the mathematical model, and specifically relates to a method for rapidly evaluating the perpendicularity of the axle hole part based on a single datum plane. The method comprises the steps of: 1, acquiring a measuring point set of the datum plane and a point set of a measured feature, and building a characteristic line vector set and a status element set; 2, acquiring an initial key sequence numberset; 3, building an analysis matrix and an analysis column vector; 4, performing rank analysis; 5, determining an optimizing direction; 6, solving a new key point and updating the coordinate of the measuring point set; 7, judging whether the datum feature evaluation satisfies the acceptance condition or not; 8, pre-locating the point set of the measured feature; 9, updating a real-time status element set; 10, updating a key sequence number set of the measured feature; 11, building the analysis matrix and the analysis column vector; 12, performing the rank analysis; 13, determining the optimizing direction; 14, solving the new key point and updating the coordinate of the measuring point set; and 15, performing qualification judgment.

Description

technical field [0001] The invention belongs to the field of precision measurement and computer application, and specifically relates to a stable, rapid and simple method for evaluating the verticality of shaft-hole parts based on a single reference plane, which can be used for the error of the verticality of shaft-hole parts based on a single reference plane Conformity inspection and assessment, and provide guidance for the improvement of processing technology. Background technique [0002] Dimensional error and shape error (abbreviation of shape error and position error) directly affect product quality, assembly and service life. It is of great significance to quickly and accurately calculate part error. The verticality error of shaft and hole parts based on a single reference plane refers to the minimum circumscribed cylinder diameter that is perpendicular to the reference plane and includes the axis of the measured hole and shaft part. [0003] The first category, speci...

AI Technical Summary

Problems solved by technology

However, this method is very sensitive to the initial value and is not always stable for the geometry evaluation task

[0008] In summary, when the current geometric evaluation method is applied to the verticality of shaft and hole parts based on a single datum plane, it cannot be stable, fast and simple in form at the same time.

Images