Error measurement workpiece perpendicularity rapid evaluation method based on single reference plane

Abstract

The invention belongs to the field of precision metrology and computer application, and relates to a method for evaluating a hole shaft part by combining a virtual gauge with measurement data in a mathematical model form, in particular to a method for evaluating the perpendicularity of an L-shaped error measurement workpiece based on a single reference plane, and the method comprises the following steps of: 1, acquiring a reference plane measurement point set and a measured element point set, and establishing a feature row vector set and a state element set; 2, acquiring an initial key sequence number set; 3, establishing an analysis matrix and an analysis column vector; 4, carrying out rank analysis; 5, determining an optimizing direction; 6, solving a new key point, and updating the coordinates of the measuring point set; 7, judging whether the reference element evaluation meets a qualified condition or not; 8, updating the measured element point set; 9, updating a real-time state element set; 10, updating the key sequence number set of the measured elements; 11, establishing an analysis matrix and an analysis column vector; 12, carrying out rank analysis; 13, determining an optimizing direction; 14, solving a new key point, and updating the coordinates of the measurement point set; and 15, carrying out qualification judgment.

Description

technical field [0001] The invention belongs to the field of precision metrology and computer application, and in particular relates to a stable, fast and simple method for evaluating the perpendicularity of a workpiece based on a single reference plane for error measurement, which can be used for the qualification detection of the verticality of an L-shaped measuring workpiece with a single reference plane As well as error evaluation, the evaluation results can provide useful guidance for the improvement of processing technology. Background technique [0002] The present invention takes the L-shaped error measurement workpiece as an example to verify a method for quickly evaluating the perpendicularity of the L-shaped error measurement workpiece based on a single reference plane. The specific placement of the workpiece is that the bottom surface of the L-shaped workpiece fits the horizontal surface, and the side is vertical to the bottom surface. Take the bottom surface of...

AI Technical Summary

Problems solved by technology

In this type of method, the form of the mathematical model is relatively complicated, and the speed change is uneven, so it is not easy to be extended to various tolerance evaluations. Of course, this method is also difficult to be extended to the verticality of angle iron parts based on a single datum plane. evaluating

[0009] In summary, when the current geometric evaluation method is applied to the verticality of angle iron parts with a single reference plane, it is still unable to achieve stability, speed and simplicity at the same time.

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