Three-coordinate measuring machine measuring method of complex workpiece surface flatness measurement

Abstract

The invention discloses a three-coordinate measuring machine measuring method of complex workpiece surface flatness measurement and relates to the simulation measurement field. The method comprises the following steps of carrying out workpiece gridding; extracting a space coordinate of a workpiece grid unit node; screening a grid unit node of a surface to be measured; determining a measuring position of a measuring point and a measuring track; generating a three-coordinate measuring program of the surface to be measured; completing acquisition of three-coordinate measuring point positions; andfinally acquiring an actual measuring value of a whole measuring surface sampling node set. The method does not depend on a specific sampling curve and a regular sampling area, and the measuring point of a complex workpiece surface can be rapidly generated; based on a condition that measuring surface integrity is guaranteed, sampling uniformity is ensured; and measuring point distribution and measuring path planning are less dependent on manpower, and the method possesses good adaptability to measurement of different complex surface components.

Description

technical field [0001] The invention relates to the field of simulation measurement, in particular to a three-coordinate measuring machine measurement method for measuring the surface flatness of complex workpieces. Background technique [0002] The three-coordinate measuring machine obtains the spatial coordinate information of the contact point through contact measurement, which reflects the actual manufacturing size and surface flatness of the part, and is widely used in laboratory scientific research and industrial production. There are two basic principles of three-coordinate measurement: one is to establish a fixture coordinate system through a fixed fixture system, and obtain the actual position of the corresponding point of the workpiece in the fixture coordinate system through the preset position of the three-coordinate measuring machine measuring point. Since the absolute coordinate system of the fixture is used to define the position of the preset measurement poin...

AI Technical Summary

Problems solved by technology

This technology only realizes the reduction of the initial measurement grid, and cannot realize the irregular grid measurement of complex surfaces, so the measurement adaptability to complex workpiece surfaces is small

[0005] The current three-coordinate measuring machine defines the position of the measurement point, mainly relying on manual point finding, or defining a standard measurement sampling curve, or defining a standard sampling area. This mode of defining the position of the measurement point not only requires a large number of manual definition operations, Relying on the standard sampling point trajectory, and for the measurement of complex workpiece surfaces, manual definition of measurement points or scanning measurement of specific areas cannot achieve efficient and uniform point distribution, and cannot achieve irregular grid measurement of irregular surfaces

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